Anti-scouring continuous blowdown cascade labyrinth regulating valve
By designing an anti-scouring continuous sewage discharge cascade labyrinth regulating valve, the medium is buffered by a multi-stage buffer cavity, which solves the problem of easy damage of the existing regulating valve and achieves good medium buffering effect, strong anti-scouring ability and long service life.
Patent Information
- Application Number
- CN202423126117.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The existing angle regulating valves of the main and bypass regulating valves of the continuous blowdown of the steam drum are easily damaged under the long-term erosion of the full pressure difference of the steam drum pressure, have poor impact resistance of the buffer medium, and have a short service life.
The anti-scour continuous sewage discharge cascade maze regulating valve is adopted. The medium inlet and outlet are designed with an asymmetrical tilt setting. Combined with a multi-stage buffer cavity and a multi-section valve core structure, the medium is buffered through the bending channel, and the impact force is reduced by the multi-stage buffer cavity composed of the anti-scour sleeve and the valve core. The valve core and anti-scour sleeve are replaceable.
It can effectively buffer the impact of the medium and extend the service life of the valve. The damaged parts can be replaced separately, which improves the durability of the entire valve.
Smart Images
Figure CN223447682U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of anti-scouring continuous blowdown cascade labyrinth regulating valve. BACKGROUND
[0002] The continuous blowdown main and bypass regulating door of steam drum in prior art are mostly angle regulating valve, the regulating valve generally adopts throttling sleeve type regulating mode, the impact ability of buffer medium is poor, is easily damaged under the long-term steam drum pressure full pressure difference scouring effect, and service life is lower. UTILITY MODEL CONTENTS
[0003] The utility model aims at overcoming the insufficient of prior art, provide a kind of anti-scouring continuous blowdown cascade labyrinth regulating valve, and the buffer effect of medium is good, and the anti-scouring ability is strong, and service life is long.
[0004] The technical scheme of the utility model is: a kind of anti-scouring continuous blowdown cascade labyrinth regulating valve, including valve body, valve cover, valve stem and the valve core fixed on valve stem, the lower end of the valve body is respectively provided with the medium inlet and the medium outlet of asymmetric and inclined arrangement, the valve cavity of valve body is located between the medium inlet and the medium outlet, one end of the medium outlet penetrates the bottom of valve cavity, one end of the medium inlet penetrates the side wall of the lower end of valve cavity, a scouring sleeve is fixed in the valve cavity, the outer periphery of the scouring sleeve keeps distance with the inner wall of valve cavity, the inner periphery of the scouring sleeve is provided with multiple convex rings, each the convex ring will be separated into multiple stages buffer cavities in the scouring sleeve, multiple through holes are arrayed on the buffer cavity of the uppermost stage, the outer diameter of the valve core corresponds with the inner diameter of each convex ring, the valve core is also provided with multiple necked portions corresponding to each convex ring, the bottom of the valve core is also provided with a plug, the plug is arranged corresponding to the communication place of medium outlet and valve cavity.
[0005] Further, the bottom of the valve cavity has a deep hole, the deep hole and the scouring sleeve are coaxially arranged, one end of the medium outlet penetrates the side wall of the deep hole, the bottom of the plug has a column corresponding to the deep hole.
[0006] Further, the outer periphery of the column is also provided with a sealing ring, and the bottom of the deep hole is arc-shaped.
[0007] Specifically, the top of the scouring sleeve is fixed to the top of the valve cavity by a hole sealing pad block, the bottom of the valve cavity has a fixed recess hole corresponding to the scouring sleeve, and the bottom of the scouring sleeve is inserted and sealingly connected in the fixed recess hole.
[0008] Further, the valve core is also provided with multiple sealing rings corresponding to each convex ring.
[0009] Further, the upper end of the convex ring has a horn-shaped flow guide port, and the horn-shaped flow guide port has an inclined flow guide groove.
[0010] Furthermore, the outer periphery of the lower end of the anti-scour sleeve is also provided with a threaded guide convex strip.
[0011] Specifically, the valve core is a multi-section structure, and each section of the valve core is screwed onto the valve stem in sequence.
[0012] Preferably, the convex ring has two sections and the reduced diameter portion has two segments.
[0013] Furthermore, both ends of the two reduced diameter portions each have a frustum.
[0014] The beneficial effect of the utility model is that when the medium flows through the utility model, it first needs to enter the anti-scour sleeve through the bent channel, then pass through the multi-stage buffer cavity composed of the anti-scour sleeve and the valve core, and then be discharged into the medium outlet from the bottom of the valve cavity. This process can effectively buffer the impact force of the medium and reduce the impact on the inside of the valve body.
[0015] Moreover, the anti-scour sleeve of the utility model is a replaceable structure, and the valve core is a multi-stage replaceable structure. When the above two components are damaged or partially damaged, there is no need to replace the entire valve or valve core, which can effectively improve the overall service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the utility model in the open state;
[0017] Figure 2 This is a schematic diagram of the structure of the utility model in the closed state;
[0018] Figure 3 It is a structural diagram of the valve core of the utility model.
[0019] In the figure: valve body 1, valve cover 2, valve stem 3, valve core 4, medium inlet 5, medium outlet 6, valve chamber 7, anti-scour sleeve 8, convex ring 9, reduced diameter part 10, plug 11, deep hole 12, cylinder 13, sealing ring 14, perforated sealing gasket 15, and guide convex strip 16. DETAILED DESCRIPTION
[0020] The technical solution of the present invention will be further specifically described below with reference to the embodiments and the accompanying drawings.
[0021] Combine Figure 1 and Figure 2As shown, the anti-erosion continuous blowdown cascade labyrinth regulating valve comprises a valve body 1, a valve cover 2, a valve stem 3, and a valve core 4 fixed on the valve stem 3. The valve body 1 has an asymmetric and inclined medium inlet 5 and a medium outlet 6 on both sides of the lower end. A valve cavity 7 is located between the medium inlet 5 and the medium outlet 6. One end of the medium outlet 6 penetrates the bottom of the valve cavity 7, and one end of the medium inlet 5 penetrates the side wall of the lower end of the valve cavity 7. An anti-erosion sleeve 8 is fixed in the valve cavity 7. The outer periphery of the anti-erosion sleeve 8 is spaced from the inner wall of the valve cavity 7. The inner periphery of the anti-erosion sleeve 8 is provided with multiple convex rings 9. Each convex ring 9 separates the anti-erosion sleeve 8 into multiple stages of buffer cavities. Multiple through holes are arranged on the uppermost stage of the buffer cavities. The outer diameter of the valve core 4 corresponds to the inner diameter of each convex ring 9. The valve core 4 is also provided with multiple reduced diameter portions 10 corresponding to each convex ring 9. The bottom of the valve core 4 is also provided with a plug 11 corresponding to the communication between the medium outlet 6 and the valve cavity 7.
[0022] The working principle of the above structure is as follows: when the valve is opened, the valve stem 3 and the valve core 4 are in a raised state. The medium enters the gap between the valve cavity 7 and the anti-erosion sleeve 8 from the medium inlet 5, and then enters the anti-erosion sleeve 8 from the uppermost stage of the buffer cavities. At this time, each reduced diameter portion 10 of the valve core 4 is raised to the position of the convex ring 9, forming a gap between the reduced diameter portion 10 and the convex ring 9. The plug 11 is spaced from the bottom of the valve cavity 7. The medium passes through each buffer cavity in turn, and finally is discharged into the medium outlet 6 and discharged from the medium outlet 6; when the valve is closed, the valve stem 3 drives the valve core 4 to descend. The valve core 4 and each convex ring 9 cooperate to form multiple stages of sealing surfaces. The plug 11 closes the communication between the medium outlet 6 and the bottom of the valve cavity 7 to ensure the sealing of the valve.
[0023] As can be seen from the above, when the medium flows, it needs to pass through the bent channel into the anti-erosion sleeve 8, and then pass through the multiple stages of buffer cavities composed of the anti-erosion sleeve 8 and the valve core 4, and finally be discharged into the medium outlet 6 from the bottom of the valve cavity 7. This can effectively buffer the impact force of the medium and reduce the impact on the inside of the valve body 1. Moreover, the impact force of the medium mainly acts on the anti-erosion sleeve 8. When the anti-erosion sleeve 8 is deformed and twisted, the anti-erosion sleeve 8 can be replaced, without the need to replace the entire valve, which can effectively improve the service life of the entire valve.
[0024] In another embodiment, the bottom of the valve cavity 7 has a deep hole 12 coaxially arranged with the anti-erosion sleeve 8. One end of the medium outlet 6 penetrates the side wall of the deep hole 12. The bottom of the plug 11 has a column 13 corresponding to the deep hole 12. This structure allows the medium to be buffered by the deep hole 12 before entering the medium outlet 6, thereby reducing the impact of the medium on the end of the medium outlet 6. On the other hand, the cooperation of the column 13 and the deep hole 12 also increases another heavy seal.
[0025] Specifically, a sealing ring is provided on the outer periphery of the column 13 to ensure the sealing between the column 13 and the deep hole 12. The bottom of the deep hole 12 is arc-shaped so that the descending medium forms a swirl flow before being discharged into the medium outlet 6.
[0026] In another embodiment, the top of the anti-scour sleeve 8 is fixed to the top of the valve cavity 7 through a perforated sealing gasket 15, and the bottom of the valve cavity 7 has a fixed recessed hole corresponding to the anti-scour sleeve 8, and the bottom of the anti-scour sleeve 8 is inserted into and sealed in the fixed recessed hole.
[0027] In another embodiment, the valve core 4 is further provided with a plurality of sealing rings 14 corresponding to the convex rings 9 to ensure the reliability of the sealing after the valve core 4 and the convex rings 9 are matched;
[0028] In another embodiment, the upper end of the convex ring 9 has a trumpet-shaped guide port, and the trumpet-shaped guide port has an inclined guide groove to further improve the buffering capacity of this position for the medium;
[0029] In another embodiment, the outer periphery of the lower end of the anti-scour sleeve 8 also has a threaded guide ridge 16, which on the one hand enhances the strength of the lower end of the anti-scour sleeve 8, and on the other hand guides the medium entering from the medium inlet 5 to reduce the impact of the medium on the lower end of the anti-scour sleeve 8 when entering the valve chamber 7.
[0030] In another embodiment, Figure 3 As shown, the valve core 4 is a multi-section structure, and each section of the valve core 4 is screwed onto the valve stem 3 in sequence. This structure allows only the section of the valve core 4 to be replaced when part of the valve core 4 is twisted or deformed, without having to replace the entire valve core 4.
[0031] Preferably, the convex ring 9 has two sections, and the reduced diameter portion 10 has two sections;
[0032] Specifically, since the reduced diameter portion 10 is subjected to greater impact when the valve is opened, both ends of the reduced diameter portions 10 are respectively provided with a frustum to increase the service life of the reduced diameter portions 10 .
Claims
1. A scour-resistant continuous sewage discharge cascade labyrinth regulating valve, comprising a valve body (1), a valve cover (2), a valve stem (3), and a valve core (4) fixed to the valve stem (3), wherein the lower end of the valve body (1) is provided with asymmetrical and inclined medium inlet (5) and medium outlet (6), respectively, and the valve cavity (7) of the valve body (1) is located between the medium inlet (5) and the medium outlet (6), and wherein the valve body (1) is characterized in that: One end of the medium outlet (6) passes through the bottom of the valve cavity (7), and one end of the medium inlet (5) passes through the side wall of the lower end of the valve cavity (7). An anti-scouring sleeve (8) is fixed in the valve cavity (7), and the outer periphery of the anti-scouring sleeve (8) maintains a distance from the inner wall of the valve cavity (7). The inner periphery of the anti-scouring sleeve (8) is provided with multiple convex rings (9) at the same height. Each convex ring (9) divides the interior of the anti-scouring sleeve (8) into multiple buffer cavities. A plurality of through holes are arranged in an array on the buffer cavity at the uppermost level. The outer diameter of the valve core (4) corresponds to the inner diameter of each convex ring (9). The valve core (4) also has multiple reduced diameter portions (10) corresponding to each convex ring (9). The bottom of the valve core (4) is also provided with a plug (11). The plug (11) is provided corresponding to the connection between the medium outlet (6) and the valve cavity (7).
2. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 1, characterized in that: The bottom of the valve cavity (7) has a deep hole (12), the deep hole (12) and the anti-scour sleeve (8) are coaxially arranged, one end of the medium outlet (6) passes through the side wall of the deep hole (12), and the bottom of the plug (11) has a column (13) corresponding to the deep hole (12).
3. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 2, characterized in that: A sealing ring is also provided on the outer periphery of the column (13), and the bottom of the deep hole (12) is arc-shaped.
4. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 3, characterized in that: The top of the anti-scour sleeve (8) is fixed to the top of the valve cavity (7) via a perforated sealing gasket (15); the bottom of the valve cavity (7) has a fixed recessed hole corresponding to the anti-scour sleeve (8); and the bottom of the anti-scour sleeve (8) is inserted into and sealed in the fixed recessed hole.
5. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 4, characterized in that: The valve core (4) is also provided with a plurality of sealing rings (14) corresponding to the convex rings (9).
6. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 5, characterized in that: The upper end of the convex ring (9) is provided with a trumpet-shaped flow guide port, and the trumpet-shaped flow guide port is provided with a guide groove arranged obliquely.
7. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 6, characterized in that: The outer periphery of the lower end of the anti-scour sleeve (8) is also provided with a threaded flow-guiding convex strip (16).
8. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 1, characterized in that: The valve core (4) is a multi-section structure, and each section of the valve core (4) is screwed onto the valve stem (3) in sequence.
9. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 8, characterized in that: The convex ring (9) has two sections, and the reduced diameter portion (10) has two sections.
10. The anti-scour continuous sewage discharge cascade labyrinth regulating valve according to claim 9, characterized in that: Both ends of the two reduced diameter parts (10) are also provided with a frustum.