Flow stabilizing fence structure at the end of the labyrinth flow channel
By setting up a stable flow fence structure at the end of the labyrinth flow channel in the valve, and using multiple impact reversals to reduce the medium flow rate, the problem of medium erosion of the valve core under a small opening and large pressure difference is solved, and effective protection of the valve core is achieved.
Patent Information
- Application Number
- CN202421562950.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-03
AI Technical Summary
When the valve is running at a small opening and a large pressure difference, high-pressure steam or medium can easily directly erode the valve core, resulting in wear, leakage and even damage to the valve core. The traditional labyrinth structure cannot completely avoid the erosion of the valve core by the medium.
The labyrinth sheet flow channel end steady flow fence structure is adopted, and is arranged at the bottom of the valve core guide sleeve in the valve body, including multiple sets of axial buffer components. Each buffer component is composed of a barrier plate, a first fence plate, a second fence plate and a barrier plate. The first fence plate and the second fence plate are stacked up and down to form a bent overflow gap. When the medium passes through these gaps, it impacts, reduces the flow rate and reduces the impact on the valve core.
Through multiple impact commutation of the medium in the buffer assembly, the flow rate and impact potential energy of the medium are reduced, and the impact of the medium on the valve core is significantly reduced, ensuring the stability and long life of the valve core.
Smart Images
Figure CN222746738U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of valves, in particular to a flow stabilizing fence structure at the end of a labyrinth flow channel. Background Art
[0002] When the valve is running with a small opening and a large pressure difference, high-pressure steam or medium can easily directly erode the valve core, causing wear, leakage or even damage to the valve core. Although the traditional labyrinth structure can reduce the medium flow rate to a certain extent, it cannot completely prevent the medium from eroding the valve core.
[0003] In summary, how to offset the flow rate of the medium and ensure that the medium does not erode the valve core has become an urgent problem that researchers in this field need to solve. Utility Model Content
[0004] The technical problem to be solved by the utility model is: how to offset the flow rate of the medium and ensure that the medium does not erode the valve core;
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] The utility model is a flow stabilizing fence structure at the end of a labyrinth flow channel, wherein the fence structure is arranged at the bottom of a valve core guide sleeve in a valve body, and comprises: a plurality of axially arranged buffer components arranged on an upper support plate and a lower support plate; each buffer component comprises: a baffle plate, a first fence plate, a second fence plate, and a baffle plate are arranged axially in sequence from top to bottom; when the first fence plate and the second fence plate are stacked up and down, a curved flow gap is formed between the first fence plate and the second fence plate;
[0007] In this solution, the medium enters from the outside of the buffer component and is discharged from the inside of the buffer component. When the medium passes through the upper and lower curved flow gaps, collision occurs, which reduces the impact potential energy of the medium, can reduce the flow rate of the medium, and reduce the erosion effect of the medium on the valve core.
[0008] The top of the upper support plate is connected to the valve core guide sleeve, and the bottom of the lower support plate is connected to the valve seat. The function of the barrier plate is to prevent the medium from entering another buffer component, causing turbulence of the medium during the buffering process.
[0009] In order to illustrate the first setting method of the first fence plate and the second fence plate, the utility model adopts a first fence plate with a first circulation hole in a ring shape; the second fence plate has a first groove opened outwardly on its inner side edge, and a second groove opened inwardly on its outer side edge; a first fence is formed between the first groove and the second groove, and the first fence is located below the first circulation hole; partial areas of the first groove and the second groove are connected to the first circulation hole.
[0010] In this solution, the medium enters from the second groove, enters the first flow hole through the impact reversal of the first fence, and collides when moving to the end of the first flow hole. The secondary reversal discharges the medium from the first groove, and the medium realizes secondary impact reversal in the buffer assembly to offset the potential energy of the medium, allowing the medium to enter the valve core to reach a stable state, thereby avoiding erosion of the valve core.
[0011] In order to illustrate the second setting mode of the first fence plate and the second fence plate, the utility model adopts the first fence plate on which the second flow hole and the third flow hole are opened in a ring shape, and the third flow hole is located on the outside of the second flow hole; the second fence plate has a fourth flow hole opened in a ring shape in the middle; the second fence plate has a third groove opened outwardly on the inner side edge, and a fourth groove opened inwardly on the outer side edge; the third groove and a part of the fourth flow hole are connected to the second flow hole; a part of the fourth flow hole and the fourth groove are connected to the third flow hole; the third groove and a side edge of the fourth flow hole form a second fence, and a third fence is formed between a side edge of the fourth flow hole and the fourth groove; a fourth fence is formed between the second flow hole and the third flow hole;
[0012] In this solution, the medium enters from the third groove, hits the second fence, changes direction and enters the third flow hole, hits when moving to the end of the third flow hole, changes direction twice and enters the fourth flow hole, hits when moving to the end of the fourth flow hole, changes direction three times and enters the second flow hole, hits when moving to the end of the second flow hole, changes direction four times and enters the fourth groove for discharge. The medium realizes four impact changes in the buffer assembly, which offsets the potential energy of the medium, and makes the medium enter the valve core to reach a stable state, thereby avoiding erosion of the valve core.
[0013] In order to realize the axial positioning of multiple buffer components, the utility model adopts a positioning rod disposed between the upper support plate and the lower support plate; the positioning rod axially passes through the buffer component for positioning connection;
[0014] This enables multiple buffer components to be stacked and fixed axially.
[0015] The first fence plate and the second fence plate are made of stainless steel or alloy steel.
[0016] The first fence plate and the second fence plate are made of wear-resistant and corrosion-resistant metal materials, such as stainless steel or alloy steel, to improve their long-term operational stability and reliability.
[0017] The first flow hole, the first slot, and the second slot have a side surface that impacts the medium at an angle of 0 to 30° to the vertical plane, or the second flow hole, the third flow hole, the fourth flow hole, the third slot, and the fourth slot have a side surface that impacts the medium at an angle of 0 to 30° to the vertical plane;
[0018] The inclined setting of the impact surface can counteract the turbulence generation of the medium.
[0019] The length of the first circulation hole is 2 to 3 times the width of the first fence, the length of the second circulation hole is 2 to 3 times the width of the second fence; the length of the third circulation hole is 2 to 3 times the width of the third fence;
[0020] This setting ensures that the medium can pass through the flow gap smoothly and avoids blockage.
[0021] The beneficial effects of the utility model are as follows: the utility model is a flow stabilizing fence structure at the end of a labyrinth flow channel. The medium enters from the outside of the buffer component and is discharged from the inside of the buffer component. When the medium passes through the upper and lower bent flow gaps, collision occurs, which reduces the impact potential energy of the medium, can reduce the flow rate of the medium, and reduce the erosion effect of the medium on the valve core. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0023] Figure 1 It is a schematic diagram of the structure in which the fence structure is installed in the valve body;
[0024] Figure 2 It is a cross-sectional view of the utility model;
[0025] Figure 3 yes Figure 2 A schematic diagram of the structure at A;
[0026] Figure 4 yes Figure 2 Schematic diagram of the structure at B;
[0027] Figure 5 This is an exploded view of the utility model with half of the first fence board and the second fence board omitted. DETAILED DESCRIPTION
[0028] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0029] like Figure 1-4 As shown, the utility model is a flow stabilizing fence structure at the end of a labyrinth flow channel, wherein the fence structure 1 is arranged at the bottom of a valve core guide sleeve 3 in a valve body 2, and comprises: a plurality of groups of axially arranged buffer components 6 arranged on an upper support plate 4 and a lower support plate 5; each buffer component 6 comprises: a baffle plate 7, a first fence plate 8, a second fence plate 9, and a baffle plate 7 are axially arranged in sequence from top to bottom; when the first fence plate 8 and the second fence plate 9 are stacked up and down, a curved flow gap 10 is formed between the first fence plate 8 and the second fence plate 9;
[0030] In this solution, the medium enters from the outside of the buffer component and is discharged from the inside of the buffer component. When the medium passes through the upper and lower curved flow gaps, it will collide, reducing the impact potential energy of the medium, which can reduce the flow rate of the medium and reduce the erosion effect of the medium on the valve core.
[0031] The top of the upper support plate is connected to the valve core guide sleeve, and the bottom of the lower support plate is connected to the valve seat. The function of the barrier plate is to prevent the medium from entering another buffer component, causing turbulence of the medium during the buffering process.
[0032] like Figure 3 As shown, in order to illustrate the first setting method of the first fence plate and the second fence plate, the utility model adopts the first fence plate 8 on which the first circulation hole 11 is opened in a ring shape; the second fence plate 9 has a first groove 12 opened outwardly on its inner side edge, and a second groove 13 opened inwardly on its outer side edge; a first fence 14 is formed between the first groove 12 and the second groove 13, and the first fence 14 is located below the first circulation hole 11; partial areas of the first groove 12 and the second groove 13 are connected to the first circulation hole 11.
[0033] In this solution, the medium enters from the second groove, enters the first flow hole through the impact reversal of the first fence, and collides when moving to the end of the first flow hole. The secondary reversal discharges the medium from the first groove, and the medium realizes secondary impact reversal in the buffer assembly to offset the potential energy of the medium, allowing the medium to enter the valve core to reach a stable state, thereby avoiding erosion of the valve core.
[0034] like Figure 4 As shown, in order to illustrate the second setting mode of the first fence plate and the second fence plate, the utility model adopts the first fence plate 8 on which the second flow hole 14 and the third flow hole 15 are opened in a ring shape, and the third flow hole 15 is located on the outside of the second flow hole 14; the second fence plate 9 has a fourth flow hole 16 opened in a ring shape in the middle; the second fence plate 9 has a third groove 17 opened outwardly on the inner side edge, and a fourth groove 18 opened inwardly on the outer side edge; the third groove 17 and a part of the fourth flow hole 16 are connected to the second flow hole 14; a part of the fourth flow hole 16 and the fourth groove 18 are connected to the third flow hole 15; the third groove 17 and one side of the four flow holes 16 form a second fence 19, and a third fence 20 is formed between one side of the four flow holes 16 and the fourth groove 18; a fourth fence 21 is formed between the second flow hole 14 and the third flow hole 15;
[0035] In this solution, the medium enters from the third groove, hits the second fence, changes direction and enters the third flow hole, hits when moving to the end of the third flow hole, changes direction twice and enters the fourth flow hole, hits when moving to the end of the fourth flow hole, changes direction three times and enters the second flow hole, hits when moving to the end of the second flow hole, changes direction four times and enters the fourth groove for discharge. The medium realizes four impact changes in the buffer assembly, which offsets the potential energy of the medium, and makes the medium enter the valve core to reach a stable state, thereby avoiding erosion of the valve core.
[0036] like Figure 5 As shown, in order to realize the axial positioning of multiple buffer components, the utility model adopts a positioning rod 22 disposed between the upper support plate 8 and the lower support plate 9; the positioning rod 22 axially passes through the buffer component 6 for positioning connection;
[0037] This enables multiple buffer components to be stacked and fixed axially.
[0038] The first fence plate 8 and the second fence plate 9 are made of stainless steel or alloy steel.
[0039] The first fence plate and the second fence plate are made of wear-resistant and corrosion-resistant metal materials, such as stainless steel or alloy steel, to improve their long-term operational stability and reliability.
[0040] like Figure 3 As shown, the first flow hole 11, the first slot 12, and the second slot 13 have a side surface (at C) that impacts the medium and an inclination angle with the vertical plane of 0 to 30°, or the second flow hole 14, the third flow hole 15, the fourth flow hole 16, the third slot 17, and the fourth slot 18 have a side surface (at D) that impacts the medium and an inclination angle with the vertical plane of 0 to 30°;
[0041] The inclined setting of the impact surface can counteract the turbulence generation of the medium.
[0042] like Figure 4 As shown, the length of the first circulation hole 11 is 2 to 3 times the width of the first fence 14, the length of the second circulation hole 14 is 2 to 3 times the width of the second fence 19; the length of the third circulation hole 15 is 2 to 3 times the width of the third fence 20;
[0043] This setting ensures that the medium can pass through the flow gap smoothly and avoids blockage.
[0044] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A flow stabilizing fence structure at the end of the labyrinth flow channel, the fence structure is arranged at the bottom of the valve core guide sleeve in the valve body, characterized in that: include: A plurality of axially arranged buffer components are arranged on the upper support plate and the lower support plate; Each buffer assembly includes: a blocking plate, a first fence plate, a second fence plate, and a blocking plate are axially arranged in sequence from top to bottom; When the first fence plate and the second fence plate are stacked up and down, a curved flow gap is formed between the first fence plate and the second fence plate.
2. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 1, characterized in that: The first fence plate is provided with a first flow hole in a ring shape; The second fence plate has a first groove formed outwardly on its inner side and a second groove formed inwardly on its outer side; A first fence is formed between the first groove and the second groove, and the first fence is located below the first flow hole; Partial areas of the first groove and the second groove are connected to the first flow hole.
3. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 1, characterized in that: The first fence plate is provided with a second circulation hole and a third circulation hole in a ring shape, and the third circulation hole is located outside the second circulation hole; A fourth flow hole is provided in a ring-shaped manner in the middle of the second fence plate; The second fence plate has a third groove formed outwardly on its inner side and a fourth groove formed inwardly on its outer side; The third groove and a partial area of the fourth flow hole are connected to the second flow hole; A partial area of the fourth circulation hole and the fourth groove are connected to the third circulation hole; The third groove and one side of the fourth flow hole form a second fence, and a third fence is formed between one side of the fourth flow hole and the fourth groove; A fourth fence is formed between the second circulation hole and the third circulation hole.
4. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 1, characterized in that: A positioning rod is provided between the upper supporting plate and the lower supporting plate; The positioning rod axially passes through the buffer assembly for positioning connection.
5. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 1, characterized in that: The first fence plate and the second fence plate are made of alloy steel.
6. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 2, characterized in that: The inclination angle between one side surface of the first flow hole, the first groove and the second groove impacting the medium and the vertical surface is 0-30°.
7. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 3, characterized in that: The inclination angle between one side surface of the second flow hole, the third flow hole, the fourth flow hole, the third groove, and the fourth groove impacting the medium and the vertical surface is 0-30°.
8. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 2, characterized in that: The length of the first flow hole is 2 to 3 times the width of the first fence.
9. The flow stabilizing fence structure at the end of the labyrinth flow channel according to claim 3, characterized in that: The length of the second flow hole is 2 to 3 times the width of the second fence; The length of the third flow hole is 2 to 3 times the width of the third fence.