Porous depressurization cage type regulating valve

Abstract

The utility model relates to a porous depressurization cage type regulating valve, which comprises a valve body, an upper valve cover, a valve cage assembly, a valve core and a valve rod, the valve body is detachably connected with the upper valve cover, the valve body is provided with a liquid inlet cavity and a liquid outlet cavity, and the valve cage assembly is arranged between the valve body and the upper valve cover. The valve cage assembly comprises a guide valve cage, an inner valve cage, an outer valve cage and a valve seat which are sequentially distributed from top to bottom, the outer valve cage is welded to the outer side of the inner valve cage in a sleeving mode, an inner pressure reducing hole and an outer pressure reducing hole are formed in the positions, located in the liquid outlet cavity, of the inner valve cage and the outer valve cage respectively, and the inner valve cage and the outer valve cage are combined to form a buffer area. The valve cage assembly is of a valve cage structure with multiple sets of drill holes, the inner valve cage and the outer valve cage are arranged to form two pressure reduction structures, so that the valve has the pressure reduction and noise reduction functions, the inner valve cage and the outer valve cage are connected through the welding technology, the valve cage assembly is small in overall structure and small in occupied space, and the service life of the valve cage assembly is prolonged. And the whole structure of the valve is light, and the market competitiveness of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a multi-hole pressure-reducing cage-type regulating valve. Background Art

[0002] A control valve is a valve used to adjust process parameters such as medium flow, pressure, temperature, liquid level, etc. in the field of industrial automation process control. In the fields of petroleum, petrochemical, power generation, new energy, coal chemical industry, fine chemical industry, etc., high pressure and high pressure difference working conditions have extremely high requirements on the leakage level of the control valve.

[0003] The traditional porous pressure-reducing cage-type regulating valve has certain shortcomings. Patent No. CN202122603733.2 discloses a cage-type porous pressure-reducing and noise-reducing regulating valve, in which the valve cage assembly includes an inner sleeve and an outer sleeve. A plurality of water outlet holes staggered from each other are provided on the inner sleeve, the outer sleeve and the two-layer sleeve, which can effectively avoid high pressure difference and thus effectively reduce noise. However, the inner sleeve and the outer sleeve are fixed by screws. In order to reserve the screw fixing depth, the valve cage assembly is thickened as a whole, which occupies a larger space and reduces the medium flow rate. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a multi-porous pressure-reducing cage-type regulating valve, comprising a valve body, an upper valve cover, a valve cage assembly, a valve core and a valve stem, the valve body is detachably connected to the upper valve cover, the valve body is provided with a liquid inlet chamber and a liquid outlet chamber, and a valve cage assembly is provided between the valve body and the upper valve cover, the valve cage assembly is connected to a valve core for controlling the flow of the medium, the valve core is slidably connected to the upper valve cover through the valve stem, the valve cage assembly comprises a guide valve cage, an inner valve cage, an outer valve cage and a valve seat distributed in sequence from top to bottom, the outer valve cage sleeve is welded to the outside of the inner valve cage, and the inner valve cage and the outer valve cage are respectively provided with an inner pressure-reducing hole and an outer pressure-reducing hole at the liquid outlet chamber, and the inner valve cage and the outer valve cage are combined to form a buffer zone.

[0005] By adopting the above technical solution, the valve cage assembly is a valve cage structure with multiple groups of drilled holes, and is provided with an inner valve cage and an outer valve cage, a total of two pressure reducing structures. When the valve core is opened, the medium flows in from the liquid inlet chamber, and flows into the buffer zone from the inner pressure reducing hole. The medium is buffered and mixed and then flows from the second pressure reducing hole to the liquid outlet chamber, so that the valve has the function of reducing pressure and noise. The inner valve cage and the outer valve cage are connected by welding technology, so that the overall structure of the valve cage assembly is compact and occupies little space, making the overall structure of the valve lightweight, thereby improving the market competitiveness of the product.

[0006] The utility model is further configured such that a limiting portion is provided above the inner valve cage, the top surface of the outer valve cage abuts against the limiting portion, an upper welding point is provided between the limiting portion and the outer valve cage, and a lower welding point is provided between the bottom surface of the inner valve cage and the outer valve cage.

[0007] By adopting the above technical solution, an array of drilled holes are provided on the outer valve cage and the side of the outer valve cage. The outer valve cage is sleeved on the outer side of the inner valve cage from bottom to top. When the outer valve cage abuts against the limiting part, the joints of the outer valve cage and the inner valve cage are welded to form upper and lower welding points.

[0008] The utility model is further configured that the valve cage assembly also includes a sealing ring, the bottom surface of the guide valve cage abuts against the limiting portion, and the sealing ring is clamped between the guide valve cage and the inner valve cage, and the valve core is sealed and connected to the inner valve cage through the sealing ring.

[0009] Furthermore, the valve seat is provided with a protrusion, the inner valve cage and the outer valve cage are combined to form a slot adapted to the protrusion, the slot is clamped to the outer side of the protrusion, and the valve core is abutted and sealed to the inner side of the protrusion.

[0010] By adopting the above technical solution, the sealing ring is a high temperature resistant metal ring, which mainly plays the role of guiding the valve core between the guide valve cage and the valve cage. The raised part also plays the role of positioning with the outer valve cage and sealing connection when abutting with the valve core.

[0011] The utility model is further configured that a main sealing member is provided between the valve body and the upper valve cover, an upper sealing member is provided between the guide valve cage and the upper valve cover, and a lower sealing member is provided between the valve seat and the valve body.

[0012] Furthermore, the upper valve cover is provided with a stuffing box, and the valve stem is slidably connected to the upper valve cover via the stuffing box.

[0013] By adopting the above technical solution, the sealing effect of the upper and lower ends of the valve cage assembly is improved through the upper seal and the lower seal. The valve stem is connected to the upper valve cover in a sliding seal through the stuffing box to prevent the medium from leaking from the gap between the valve stem and the upper valve cover, thereby improving the overall sealing effect of the valve body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The cage assembly is a cage structure with multiple sets of holes, and is equipped with two pressure-reducing structures, the inner cage and the outer cage, so that the valve has the functions of pressure reduction and noise reduction;

[0016] 2. The inner cage and the outer cage are connected by welding process, which makes the overall structure of the cage assembly compact and occupies little space, making the overall structure of the valve lightweight and improving the market competitiveness of the product.

[0017] The embodiments of the utility model are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural sectional view of the utility model;

[0019] Figure 2 It is a structural cross-sectional view of the inner valve cage and the outer valve cage of the utility model after welding;

[0020] Figure 3 It is a structural schematic diagram of the medium of the utility model when it flows through the inner valve cage and the outer valve cage;

[0021] Figure 4 For the utility model Figure 1 A partial enlarged view of the A-direction view;

[0022] Among them: 1-valve body, 2-upper valve cover, 3-valve cage assembly, 4-valve core, 5-valve stem, 6-main seal, 7-upper seal, 8-lower seal, 9-stuffing box, 11-liquid inlet cavity, 12-liquid outlet cavity, 13-inner pressure relief hole, 14-external pressure relief hole, 15-buffer zone, 31-guide valve cage, 32-inner valve cage, 33-outer valve cage, 34-valve seat, 35-sealing ring, 321-limiting part, 322-upper welding point, 323-lower welding point, 324-slot, 341-protrusion; DETAILED DESCRIPTION

[0023] like Figure 1 , 2 As shown, the present embodiment provides a porous pressure-reducing cage-type regulating valve, comprising a valve body 1, an upper valve cover 2, a valve cage assembly 3, a valve core 4 and a valve stem 5. The valve body 1 is detachably connected to the upper valve cover 2. The valve body 1 is provided with a liquid inlet chamber 11 and a liquid outlet chamber 12, and a valve cage assembly 3 is provided between the valve body 1 and the upper valve cover 2. The valve cage assembly 3 is connected to a valve core 4 for controlling the flow of a medium. The valve core 4 is slidably connected to the upper valve cover 2 through the valve stem 5. The valve cage assembly 3 comprises a guide valve cage 31, an inner valve cage 32, an outer valve cage 33 and a valve seat 34 which are sequentially distributed from top to bottom. The outer valve cage 33 is welded to the outer side of the inner valve cage 32, and the inner valve cage 32 and the outer valve cage 33 are respectively provided with an inner pressure-reducing hole 13 and an outer pressure-reducing hole 14 at the liquid outlet chamber 12, and the inner valve cage 32 and the outer valve cage 33 are combined to form a buffer zone 15.

[0024] In this embodiment, a limiting portion 321 is provided above the inner valve cage 32, and the top surface of the outer valve cage 33 abuts against the limiting portion 321. An upper welding point 322 is provided between the limiting portion 321 and the outer valve cage 33, and a lower welding point 323 is provided between the bottom surface of the inner valve cage 32 and the outer valve cage 33. The outer valve cage 33 and the side surfaces of the outer valve cage 33 are provided with array-distributed drill holes. The outer valve cage 33 is sleeved on the outer side of the inner valve cage 32 from bottom to top. When the outer valve cage 33 abuts against the limiting portion 321, the joints of the outer valve cage 33 and the inner valve cage 32 are welded to form an upper welding point 322 and a lower welding point 323.

[0025] Combination Figure 4As shown, in this embodiment, the valve cage assembly 3 also includes a sealing ring 35, the bottom surface of the guide valve cage 31 abuts against the limiting portion 321, and the sealing ring 35 is clamped between the guide valve cage 31 and the inner valve cage 32, the valve core 4 is sealed and connected to the inner valve cage 32 through the sealing ring 35, the valve seat 34 is provided with a protrusion 341, the inner valve cage 32 and the outer valve cage 33 are combined to form a groove 324 adapted to the protrusion 341, the groove 324 is clamped on the outer side of the protrusion 341, the valve core 4 abuts and is sealed and connected to the inner side of the protrusion 341, the sealing ring 35 is a high temperature resistant metal ring, which mainly guides the valve core 4 between the guide valve cage 31 and the valve cage, and the protrusion 341 also plays a role in positioning with the outer valve cage 33, and a role in sealing connection when abutting with the valve core 4.

[0026] In this embodiment, a main seal 6 is provided between the valve body 1 and the upper valve cover 2, an upper seal 7 is provided between the guide valve cage 31 and the upper valve cover 2, a lower seal 8 is provided between the valve seat 34 and the valve body 1, and the upper valve cover 2 is provided with a stuffing box 9. The valve stem 5 is slidably connected to the upper valve cover 2 through the stuffing box 9. The upper seal 7 and the lower seal 8 improve the sealing effect of the upper and lower ends of the valve cage assembly 3. The valve stem 5 is slidably and sealingly connected to the upper valve cover 2 through the stuffing box 9 to prevent the medium from leaking from the gap between the valve stem 5 and the upper valve cover 2, thereby improving the overall sealing effect of the valve body 1.

[0027] Combination Figure 3 As shown, the working principle of the utility model is that the valve cage assembly 3 is a valve cage structure with multiple groups of drilled holes, and is provided with an inner valve cage 32 and an outer valve cage 33, a total of two pressure reducing structures. When the valve core 4 is opened, the medium flows in from the liquid inlet chamber 11, and flows into the buffer zone 15 from the inner pressure reducing hole 13. The medium is buffered and mixed and then flows from the second pressure reducing hole to the liquid outlet chamber 12, so that the valve has the function of reducing pressure and reducing noise. The inner valve cage 32 and the outer valve cage 33 are connected by welding technology, so that the overall structure of the valve cage assembly 3 is compact and occupies a small space, so that the overall structure of the valve is lightweight, thereby improving the market competitiveness of the product.

[0028] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A porous pressure-reducing cage-type regulating valve, comprising a valve body (1), an upper valve cover (2), a valve cage assembly (3), a valve core (4) and a valve stem (5), wherein the valve body (1) is detachably connected to the upper valve cover (2), the valve body (1) is provided with a liquid inlet cavity (11) and a liquid outlet cavity (12), and a valve cage assembly (3) is provided between the valve body (1) and the upper valve cover (2), the valve cage assembly (3) is connected to a valve core (4) for controlling a medium flow, and the valve core (4) is slidably connected to the upper valve cover (2) through the valve stem (5), characterized in that: The valve cage assembly (3) comprises a guide valve cage (31), an inner valve cage (32), an outer valve cage (33) and a valve seat (34) which are arranged in sequence from top to bottom. The outer valve cage (33) is welded to the outer side of the inner valve cage (32). The inner valve cage (32) and the outer valve cage (33) are respectively provided with an inner pressure reducing hole (13) and an outer pressure reducing hole (14) at the liquid outlet cavity (12). The inner valve cage (32) and the outer valve cage (33) are combined to form a buffer zone (15). A limiting portion (321) is provided above the inner valve cage (32). The top surface of the outer valve cage (33) abuts against the limiting portion (321). An upper welding point (322) is provided between the limiting portion (321) and the outer valve cage (33). A lower welding point (323) is provided between the bottom surface of the inner valve cage (32) and the outer valve cage (33).

2. The porous pressure-reducing cage-type regulating valve according to claim 1, characterized in that: The valve cage assembly (3) also includes a sealing ring (35), the bottom surface of the guide valve cage (31) abuts against the limiting portion (321), and the sealing ring (35) is clamped between the guide valve cage (31) and the inner valve cage (32), and the valve core (4) is sealed and connected to the inner valve cage (32) via the sealing ring (35).

3. The porous pressure-reducing cage-type regulating valve according to claim 2, characterized in that: The valve seat (34) is provided with a protrusion (341), and the inner valve cage (32) and the outer valve cage (33) are combined to form a groove (324) adapted to the protrusion (341), the groove (324) is clamped to the outer side of the protrusion (341), and the valve core (4) is abutted and sealed to the inner side of the protrusion (341).

4. The porous pressure-reducing cage-type regulating valve according to claim 1, characterized in that: A main seal (6) is provided between the valve body (1) and the upper valve cover (2), an upper seal (7) is provided between the guide valve cage (31) and the upper valve cover (2), and a lower seal (8) is provided between the valve seat (34) and the valve body (1).

5. The porous pressure-reducing cage-type regulating valve according to claim 4, characterized in that: The upper valve cover (2) is provided with a stuffing box (9), and the valve stem (5) is slidably connected to the upper valve cover (2) via the stuffing box (9).

Images