Two-dimensional flow direction labyrinth type multi-stage depressurization regulating valve

Abstract

The utility model provides a two-dimensional flow direction labyrinth type multi-stage depressurization regulating valve which is characterized in that a sleeve seat is arranged at a throttling hole of an inner cavity of a valve body, a two-dimensional flow direction labyrinth sleeve assembly is arranged on the sleeve seat, a sealing ring seat is arranged on the two-dimensional flow direction labyrinth sleeve assembly, the sealing ring seat is tightly pressed in the valve body through an upper cover, a valve core is arranged in the valve body, and the two-dimensional flow direction labyrinth type multi-stage depressurization regulating valve is arranged in the valve body. A valve rod is arranged on the valve element, the upper end of the valve rod sequentially penetrates through a guide sleeve and an upper cover to extend out of the upper cover, the guide sleeve is installed in an inner hole in the bottom end of the upper cover, and a sealing filler set is arranged in an inner hole in the upper end of the upper cover. And a filler pressing plate is arranged above the sealing filler group and is connected with the upper cover. The two-dimensional flow direction maze sleeve assembly is of a multi-layer flat plate maze type structure, the maze set can be detached to be cleaned and replaced independently, the maintenance cost of customers is reduced, machining is easy, and cost is low; through radial and axial combination of the two layers of labyrinth pieces, a plurality of 90-degree bent flow channel structures are formed, and pressure reduction or noise reduction is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a two-dimensional flow direction labyrinth type multi-stage pressure reduction regulating valve. Background Art

[0002] In recent years, with the upgrading of industrial control technology, the application fields of control valves have become more and more extensive, and the working conditions they need to cope with have become more and more complex. In the chemical, petroleum, metallurgical, electric power and other industries, the valve stem deflects seriously under some working conditions during the production process, resulting in leakage of packing, and often involving flammable, explosive, toxic and harmful media; at the same time, the environment in which some control valves are located is also relatively harsh, accompanied by wind, sand, dust and other particles, which can easily allow external environmental debris to enter the valve packing area, causing damage to the packing. Based on these harsh working conditions involved above, a two-dimensional flow maze-type multi-stage step-down regulating valve is needed to ensure the reliability and safety of the valve during use. Summary of the invention

[0003] In view of the shortcomings in the prior art, the utility model provides a two-dimensional flow labyrinth type multi-stage step-down regulating valve, which has smooth and reliable operation. The flow channels of the labyrinth pieces can be designed independently to achieve continuous adjustment of various characteristics without dead zones, and can effectively control the flow rate and noise of the medium. The labyrinth group can be disassembled and cleaned, and can be replaced individually. It is simple to process and has low cost.

[0004] The technical solution adopted by the utility model is:

[0005] A two-dimensional flow labyrinth multi-stage pressure-reducing regulating valve, which includes: a valve body, a sleeve seat, a two-dimensional flow labyrinth sleeve assembly, a valve core, a valve stem, a sealing ring seat and an upper cover, a sleeve seat is provided at the throttling hole of the inner cavity of the valve body, a two-dimensional flow labyrinth sleeve assembly is provided on the sleeve seat, a sealing ring seat is provided on the two-dimensional flow labyrinth sleeve assembly, the sealing ring seat is pressed into the valve body by the upper cover, a valve core is provided inside the valve body, a sealing surface at the lower end of the valve core cooperates with the sleeve seat for sealing, a valve stem is provided on the valve core, the upper end of the valve stem passes through a guide sleeve and the upper cover in turn and extends to the outside of the upper cover, the guide sleeve is installed in the inner hole at the bottom end of the upper cover, a sealing packing group is provided in the inner hole at the upper end of the upper cover; a packing pressure plate is provided above the sealing packing group, and the packing pressure plate is connected to the upper cover.

[0006] Preferably, in the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, the valve stem and the valve core are connected by threads.

[0007] Preferably, in the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, the packing pressure plate is connected to the upper cover via a stud and a nut.

[0008] Preferably, the two-dimensional flow labyrinth multi-stage pressure-reducing regulating valve, wherein: the sealing packing group includes a packing pad, a packing group, a packing pad, a packing group and a packing gland from bottom to top, and a packing pressure plate is arranged above the packing gland.

[0009] Preferably, in the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, the upper cover is connected to the valve body via nuts 2 and bolts.

[0010] Preferably, in the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, a metal toothed gasket is arranged between the valve body and the upper cover, and a winding gasket is arranged between the valve body and the sleeve seat, and between the valve body and the sealing ring seat.

[0011] Preferably, in the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, a sealing ring is arranged between the valve core and the sealing ring seat, and a guide ring is arranged on the sealing ring.

[0012] Preferably, the two-dimensional flow labyrinth type multi-stage step-down regulating valve, wherein: the two-dimensional flow labyrinth sleeve assembly includes a cover plate, a labyrinth piece one, a labyrinth piece two, and a base, and a plurality of labyrinth pieces one and two are alternately arranged between the cover plate and the base; a plurality of incompletely evenly distributed rectangular holes are arranged on the labyrinth piece one and the labyrinth piece two, and adjacent labyrinth pieces one and two are superimposed, and the rectangular holes are alternately formed up and down to form a group of labyrinth flow channels, and the flow channels alternate axially up and down, and the flow channels radially form a two-dimensional flow labyrinth flow channel from inside to outside or from outside to inside.

[0013] Preferably, the two-dimensional flow labyrinth type multi-stage pressure-reducing regulating valve, wherein: the cover plate, labyrinth piece one, labyrinth piece two, and base are fixed by straight pins and nuts three, and the labyrinth piece one and the labyrinth piece two are both provided with pin holes that match the straight pins.

[0014] Advantages of the utility model:

[0015] (1) The utility model provides a two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve. The two-dimensional flow direction labyrinth sleeve assembly is a multi-layer flat labyrinth structure. The labyrinth group can be disassembled for cleaning and replaced individually, which reduces the customer's maintenance cost. The processing is simple and the cost is low. Each labyrinth piece has a plurality of rectangular holes that are not completely evenly distributed. Every two labyrinth pieces are stacked, and the rectangular holes are staggered up and down to form a group of labyrinth flow channels. The flow channels alternate axially up and down, and the flow channels radially go from inside to outside or from outside to inside, forming a two-dimensional flow direction labyrinth flow channel. Through the radial and axial combination between the two layers of labyrinth pieces, multiple 90° curved flow channel structures are formed to achieve pressure reduction or noise reduction. All labyrinth pieces in the labyrinth group are positioned by direct pins and fixed with nuts, which are easy to disassemble and assemble. The flow direction from inside to outside and from outside to inside can be selected.

[0016] (2) The two-dimensional flow maze-type multi-stage pressure-reducing regulating valve of the utility model realizes continuous multi-stage pressure reduction at full opening; the flow passages of each group of maze plates can be designed independently to realize continuous adjustment of multiple characteristics without dead zones.

[0017] (3) In the two-dimensional flow labyrinth-type multi-stage step-down regulating valve of the utility model, the sealing packing group is formed by a double-layer combination of a packing group and a packing gasket to achieve a high-performance sealing effect; metal toothed gaskets and winding gaskets are arranged between the valve body and the sleeve seat, the valve body and the sealing ring seat, and the valve body and the upper cover to ensure the overall sealing of the inner cavity of the valve body.

[0018] (4) The two-dimensional flow labyrinth type multi-stage step-down regulating valve of the utility model has a valve core and a valve stem threadedly connected, and the valve stem is welded to the bottom of the valve core and a bevel pin is added to provide a double-layer anti-loosening effect; a sealing ring is provided between the valve core and the sealing ring seat to achieve dynamic sealing of the valve core when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 for Figure 1 A partial enlarged view of Figure I.

[0021] Figure 3 for Figure 1 A partial enlarged view of middle II.

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the middle maze segment 1.

[0023] Figure 5 for Figure 3 Schematic diagram of the structure of the second middle maze segment.

[0024] Figure 6 for Figure 3 Schematic diagram of the maze piece combination. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with specific drawings and embodiments.

[0026] like Figure 1-6The present embodiment provides a two-dimensional flow labyrinth multi-stage pressure-reducing regulating valve, which comprises a valve body 1, a sleeve seat 2, a two-dimensional flow labyrinth sleeve assembly 3, a valve core 4, a valve stem 5, a sealing ring seat 6 and an upper cover 7. A sleeve seat 2 is provided at the throttling hole of the inner cavity of the valve body 1, a two-dimensional flow labyrinth sleeve assembly 3 is provided on the sleeve seat 2, a sealing ring seat 6 is provided on the two-dimensional flow labyrinth sleeve assembly 3, the sealing ring seat 6 is pressed into the valve body 1 through the upper cover 7, a valve core 4 is provided inside the valve body 1, a sealing surface at the lower end of the valve core 4 cooperates with the sleeve seat 2 for sealing, a valve stem 5 is provided on the valve core 4, an upper end of the valve stem 5 passes through a guide sleeve 8 and an upper cover 7 in sequence and extends to the outside of the upper cover 7, the guide sleeve 8 is installed in the inner hole at the bottom end of the upper cover 7, a sealing packing group 11 is provided in the inner hole at the upper end of the upper cover 7; a packing pressing plate 15 is provided above the sealing packing group, and the packing pressing plate 15 is connected to the upper cover 7.

[0027] The valve stem 5 is connected to the valve core 4 by threads, and the valve stem 5 is welded to the bottom of the valve core 4 and an inclined pin is added to prevent double loosening; the packing pressure plate 15 is connected to the upper cover 7 by a stud 13 and a nut 14; the sealing packing group 11 includes a packing pad 20, a packing group 21, a packing pad 20, a packing group 21 and a packing gland 12 from bottom to top, and a packing pressure plate 15 is arranged above the packing gland 12.

[0028] The upper cover 7 is connected to the valve body 1 through nuts 9 and bolts 10; a metal toothed gasket 16 is arranged between the valve body 1 and the upper cover 7, and a winding gasket 19 is arranged between the valve body 1 and the sleeve seat 2, and between the valve body 1 and the sealing ring seat 6.

[0029] A sealing ring 18 is arranged between the valve core 4 and the sealing ring seat 6, and a guide ring 17 is arranged on the sealing ring 18. The guide ring 17 guides the valve core 4 and prevents the sealing ring 18 from being pressurized and cold-flowing into the gap between the valve core 4 and the two-dimensional flow labyrinth sleeve assembly, thereby extending the service life of the sealing ring.

[0030] The two-dimensional flow directional labyrinth sleeve assembly 3 includes a cover plate 22, a labyrinth piece 1 23, a labyrinth piece 24, and a base 25. A plurality of labyrinth pieces 1 23 and a labyrinth piece 24 are alternately arranged between the cover plate 22 and the base 25; a plurality of incompletely evenly distributed rectangular holes are arranged on the labyrinth piece 1 23 and the labyrinth piece 24, and adjacent labyrinth pieces 1 23 and labyrinth pieces 24 are superimposed, and the rectangular holes are alternately arranged up and down to form a group of labyrinth flow channels, and the flow channels alternate axially up and down, and the flow channels radially form a two-dimensional flow directional labyrinth flow channel from the inside to the outside or from the outside to the inside, and the labyrinth group can be disassembled for cleaning and replaced individually.

[0031] The cover plate 22 , the labyrinth piece 1 23 , the labyrinth piece 24 , and the base 25 are fixed by means of a straight pin 26 and a nut 3 27 . The labyrinth piece 1 23 and the labyrinth piece 24 are both provided with a pin hole 28 that matches the straight pin 26 .

[0032] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A two-dimensional flow maze-type multi-stage pressure-reducing regulating valve, characterized in that: The valve body (1) comprises a sleeve seat (2), a two-dimensional flow direction labyrinth sleeve assembly (3), a valve core (4), a valve stem (5), a sealing ring seat (6) and an upper cover (7), wherein the sleeve seat (2) is provided at a throttle hole in the inner cavity of the valve body (1), the sleeve seat (2) is provided with a two-dimensional flow direction labyrinth sleeve assembly (3), the two-dimensional flow direction labyrinth sleeve assembly (3) is provided with a sealing ring seat (6), the sealing ring seat (6) is pressed into the valve body (1) through the upper cover (7), and the valve body (1) is provided with a sealing ring seat (6) inside. A valve core (4) is provided, wherein a sealing surface at the lower end of the valve core (4) cooperates with a sleeve seat (2) for sealing, a valve stem (5) is provided on the valve core (4), and an upper end of the valve stem (5) passes through a guide sleeve (8) and an upper cover (7) in sequence and extends to the outside of the upper cover (7), wherein the guide sleeve (8) is installed in an inner hole at the bottom end of the upper cover (7), and a sealing packing group (11) is provided in the inner hole at the upper end of the upper cover (7); a packing pressure plate (15) is provided above the sealing packing group, and the packing pressure plate (15) is connected to the upper cover (7).

2. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1 is characterized in that: The valve stem (5) is connected to the valve core (4) via threads.

3. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1 is characterized in that: The packing pressure plate (15) is connected to the upper cover (7) via a stud (13) and a nut (14).

4. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1, characterized in that: The sealing packing group (11) comprises, from bottom to top, a packing pad (20), a packing group (21), a packing pad (20), a packing group (21) and a packing gland (12), wherein a packing gland (15) is arranged above the packing gland (12).

5. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1, characterized in that: The upper cover (7) is connected to the valve body (1) via a second nut (9) and a bolt (10).

6. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1, characterized in that: A metal toothed gasket (16) is arranged between the valve body (1) and the upper cover (7), and a winding gasket (19) is arranged between the valve body (1) and the sleeve seat (2), and between the valve body (1) and the sealing ring seat (6).

7. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1, characterized in that: A sealing ring (18) is arranged between the valve core (4) and the sealing ring seat (6), and a guide ring (17) is arranged on the sealing ring (18).

8. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 1, characterized in that: The two-dimensional flow direction labyrinth sleeve assembly (3) comprises a cover plate (22), a labyrinth piece 1 (23), a labyrinth piece 2 (24), and a base (25); a plurality of labyrinth pieces 1 (23) and labyrinth pieces 2 (24) are arranged alternately between the cover plate (22) and the base (25); a plurality of incompletely evenly distributed rectangular holes are arranged on the labyrinth piece 1 (23) and the labyrinth piece 2 (24); adjacent labyrinth pieces 1 (23) and labyrinth pieces 2 (24) are superimposed, and the rectangular holes are staggered up and down to form a group of labyrinth flow channels; the flow channels are alternately arranged axially up and down, and the flow channels are arranged radially from inside to outside or from outside to inside to form a two-dimensional flow direction labyrinth flow channel.

9. The two-dimensional flow direction labyrinth type multi-stage pressure reducing regulating valve according to claim 8, characterized in that: The cover plate (22), the first labyrinth piece (23), the second labyrinth piece (24), and the base (25) are fixed by means of a straight pin (26) and a nut (27). The first labyrinth piece (23) and the second labyrinth piece (24) are both provided with a pin hole (28) that matches the straight pin (26).

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