A boiler sootblower valve disc assembly

Abstract

The utility model discloses a kind of boiler soot blower valve clack assemblies, apply in the field of boiler equipment, solve the existing boiler soot blower valve clack assembly is susceptible to medium, leading to the technical problem of the reduction of movable seal stability, its technical scheme main point is including valve body, the end of the valve body is equipped with steam inlet hole, combined valve clack is movably connected in the valve body, the combined valve clack includes drive valve stem, valve clack core block fixed with drive valve stem end portion and the protection assembly between valve stem and valve clack core block, the protection assembly includes the protection valve sleeve of drive valve stem sleeve connection, protection valve clack fixed with protection valve sleeve end portion and the shock absorbing kit between drive valve stem and protection valve stem, the shock absorbing kit includes the shock absorbing groove of being opened in the inner wall of protection valve sleeve, shock absorbing sheet fixed on drive valve stem, compression spring and tension spring respectively on drive valve stem on the both sides of shock absorbing sheet are set, with the technical effect that the work sealing stability and reliability of valve clack assembly can be improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment, and in particular to a boiler soot blower valve assembly. Background Technology

[0002] The boiler sootblower lifting valve is a crucial component in the boiler system used to control and regulate the operating status of the sootblower. Its main function is to control the flow of steam or air to start, stop, and regulate the sootblower, thereby effectively removing ash and deposits from inside the boiler. The lifting valve typically consists of a valve body, valve stem, valve disc, and drive mechanism. The valve disc is a core component within the sootblower inlet steam (or air) control valve, functioning similarly to a one-way switch. It is installed at the inlet of the sootblower body. When the sootblower needs to operate, the actuator (cylinder or motor) pushes the valve stem, causing the valve disc to leave the valve seat, opening the passage and allowing high-pressure steam or air to enter the sootblowing nozzle for soot blowing. After soot blowing is completed, the actuator drives the valve stem to reset, and the valve disc, under the pressure of the medium and the spring force (if present), tightly presses back onto the valve seat, cutting off the medium flow and preventing steam leakage into the non-operating sootblower.

[0003] Chinese Patent Publication No. CN223076271U discloses a valve disc assembly for a boiler soot blower, including a lower valve disc and an upper valve disc; a valve stem is provided at the center of the lower valve disc, passing through the upper valve disc and tightly fitting the upper valve disc; a flat-mouth threaded head is threadedly connected to the valve stem to assemble and fix the upper valve disc and the valve stem; a retractable corrugated hose is installed between the lower valve disc and the upper valve disc and located outside the valve stem; a buffer assembly is provided between the lower valve disc and the upper valve disc.

[0004] Although this type of boiler sootblower valve assembly can achieve contact sealing between the upper and lower valve discs driven by the valve stem through the combination of the set buffer component and the resistance-increasing structure, reducing contact wear, the frequent opening and closing of the valve discs, the high temperature and pressure and the erosion of the medium, especially the large amount of steam and other media directly acting on the corrugated hose part of the valve assembly from the inlet, accelerates its aging process, directly causing the upper and lower valve discs to fail due to elastic deformation during the movement of the valve stem, and thus cannot guarantee the reliable operation of the entire valve assembly. Utility Model Content

[0005] The purpose of this utility model is to provide a valve disc assembly for a boiler soot blower, which has the advantage of improving the stability and reliability of the valve disc during operation.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a boiler sootblower valve disc assembly, comprising a valve body, wherein the end of the valve body is provided with a steam inlet, characterized in that: a combined valve disc is movably connected within the valve body, the combined valve disc comprising a drive valve stem, a valve disc core block fixed to the end of the drive valve stem, and a protective assembly disposed between the valve stem and the valve disc core block, the protective assembly comprising a protective valve sleeve sleeved with the drive valve stem, a protective valve disc fixed to the end of the protective valve sleeve, and a protective valve disc disposed between the drive valve stem and the valve disc core block. A damping kit between the valve stem and the protective valve stem includes a damping groove formed on the inner wall of the protective valve sleeve, a damping plate fixed on the driving valve stem, and a compression spring and a tension spring respectively sleeved on both sides of the driving valve stem of the damping plate. The compression spring and tension spring are fitted into the damping groove. The valve disc core block is provided with a damping cavity for the protective valve disc to fit into. The inner wall of the valve body end at one end of the steam inlet is provided with a buffer block that cooperates with the protective valve disc. The inner wall of the valve body at one end of the buffer block is provided with a sealing groove for the valve disc core block to fit into.

[0007] Furthermore, the top of the protective valve disc is also provided with an oblique guide block.

[0008] Furthermore, the bottom of the sealing groove is provided with a buffer pad.

[0009] Furthermore, the end of the protective valve sleeve that is sleeved with the drive valve stem is also movably covered with a protective sleeve block.

[0010] Furthermore, a limit valve sleeve block is also movably fixed on the drive valve stem.

[0011] Furthermore, the sidewall of the valve disc core block is provided with a wear-resistant ring.

[0012] In summary, this utility model has the following beneficial effects: 1. Through the nested design of the driving valve stem and the protective valve sleeve in the combined valve disc, the protective valve disc can achieve a shock-absorbing contact process during the valve disc closing process, forming an effective absorption and buffer against contact friction impact, ensuring the durability and stability of the valve disc assembly; and through the hidden, non-exposed layout, it effectively reduces the direct impact of possible high-temperature airflow and other blowing media on the vulnerable parts of the valve disc assembly, accelerating the aging and wear of related components, and improving the overall stability and reliability of the valve disc assembly during operation. Attached Figure Description

[0013] Figure 1 This is a partial cross-sectional view of the valve disc assembly in the embodiment.

[0014] Reference numerals: 1. Valve body; 2. Steam inlet; 3. Drive valve stem; 4. Valve disc core block; 5. Protective valve sleeve; 6. Protective valve disc; 7. Damping groove; 8. Damping plate; 9. Compression spring; 10. Tension spring; 11. Damping chamber; 12. Buffer block; 13. Sealing groove; 14. Inclined guide block; 15. Buffer pad; 16. Protective sleeve block; 17. Limit valve sleeve block; 18. Wear-resistant ring. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Example: A boiler sootblower valve assembly, such as Figure 1 As shown, the valve body includes a valve body 1, with a steam inlet 2 at one end. A combined valve disc is movably connected inside the valve body 1. The combined valve disc includes a drive valve stem 3, a valve disc core block 4 fixed to the end of the drive valve stem 3, and a protective component located between the valve stem and the valve disc core block 4. During the operation of the valve body 1, an external drive actuator drives the drive valve stem 3 to realize the overall movement of the combined valve disc, thereby achieving the opening and closing process of the steam inlet 2.

[0017] The protection component includes a protective valve sleeve 5 that is sleeved with the drive valve stem 3, a protective valve disc 6 that is fixed to the end of the protective valve sleeve 5, and a damping kit located between the drive valve stem 3 and the protective valve stem. As the valve disc core block 4 moves, the protection component partially and synchronously provides damping protection for the valve disc core block 4. The damping kit includes a damping groove 7 formed on the inner wall of the protective valve sleeve 5, a damping plate 8 fixed on the drive valve stem 3, and a compression spring 9 and a tension spring 10 respectively sleeved on both sides of the drive valve stem 3. The compression spring 9 and tension spring 10 are fitted into the damping groove 7. The valve disc core block 4 is provided with a damping cavity 11 for the protective valve disc 6 to fit into. In the non-contact friction state, the relative position between the drive valve stem 3 and the protective valve sleeve 5 is stabilized by the combined work of the compression spring 9 and the tension spring 10. When the drive valve stem 3 drives the valve disc core block 4 to close near the steam inlet 2, the protection component triggers the protection function. A buffer block 12 that cooperates with the protective valve disc 6 is provided on the inner wall of the valve body 1 at one end of the steam inlet 2. As rod 3 continues to rise, the protective valve disc 6 first contacts the buffer block 12, simultaneously driving the compression spring 9 to compress and the tension spring 10 to extend, causing the protective valve disc 6 to move into the buffer groove. This weakens the direct impact friction in the conventional valve disc assembly. Furthermore, the inner wall of the valve body 1 at one end of the buffer block 12 is provided with a sealing groove 13 for the valve disc core block 4 to fit into, allowing the valve disc core block 4 to be precisely engaged in the sealing groove 13 on both sides. The bottom of the sealing groove 13 is provided with a buffer pad 15, which improves the stability and reliability of the closed seal between the combined valve disc and the valve body 1. Moreover, the vertically downward slotted design reduces the direct action of steam or other soot blowing media on the groove, delaying the wear or aging process of the seals.

[0018] Considering the smooth contact process between the protective valve disc 6 and the buffer block 12, reducing component wear caused by direct impact, the top of the protective valve disc 6 is also equipped with an inclined guide block 14. This not only ensures the smoothness and uniform force feedback process of the contact force between the protective valve disc 6 and the buffer block 12, but also enables uniform contact between the steam and other media entering the valve body 1 and the entire combined valve disc when the combined valve disc is open. This results in a uniform distribution of the soot blowing medium, maintaining a uniform airflow around the combined valve disc and avoiding wear caused by turbulence. The side wall of the valve disc core block 4 is equipped with a wear-resistant ring 18, which improves the wear resistance of the valve disc core block 4 during repeated movement and reduces the impact of potential friction gaps on airtight stability.

[0019] Meanwhile, considering that the bellows and other vulnerable components in the existing valve disc assembly are directly exposed inside the valve body 1, resulting in compromised stability and reliability of the valve disc, this valve disc assembly adopts a fitted cavity structure design. This ensures a relatively reliable and stable working environment for the damping kit, preventing accelerated aging and wear caused by direct action from media such as soot blowing gas. Furthermore, a protective sleeve block 16 is movably mounted at the end where the protective valve sleeve 5 connects to the drive valve stem 3, enabling smooth and gentle relative movement between the protective valve sleeve 5 and the drive valve stem 3. Simultaneously, a limit valve sleeve block 17 is movably fixed on the drive valve stem 3, allowing users to adjust the limit fastening position according to actual sealing conditions. By adjusting the position of the limit valve sleeve block 17, the maximum deformation of the compression spring 9 and tension spring 10 is limited, achieving flexible adjustment of the damping response of the protective valve sleeve 5.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A boiler sootblower valve assembly, comprising a valve body (1), wherein the end of the valve body (1) is provided with a steam inlet (2), characterized in that: The valve body (1) is movably connected to a combined valve disc, which includes a drive valve stem (3), a valve disc core block (4) fixed to the end of the drive valve stem (3), and a protective assembly disposed between the valve stem and the valve disc core block (4). The protective assembly includes a protective valve sleeve (5) sleeved with the drive valve stem (3), a protective valve disc (6) fixed to the end of the protective valve sleeve (5), and a damping kit disposed between the drive valve stem (3) and the protective valve stem. The damping kit includes a damping groove (7) formed on the inner wall of the protective valve sleeve (5) and a component fixed to the drive valve stem (3). The damping plate (8) is fitted on the valve stem (3) on both sides of the damping plate (8), and the compression spring (9) and tension spring (10) are respectively fitted on the valve stem (3). The compression spring (9) and tension spring (10) are fitted in the damping groove (7). The valve core block (4) is provided with a damping cavity (11) for the valve disc (6) to be fitted. The inner wall of the valve body (1) at one end of the steam inlet (2) is provided with a buffer block (12) that cooperates with the valve disc (6). The inner wall of the valve body (1) at one end of the buffer block (12) is provided with a sealing groove (13) for the valve core block (4) to be fitted.

2. The boiler sootblower valve assembly according to claim 1, characterized in that: The top of the protective valve disc (6) is also provided with an oblique guide block (14).

3. The boiler sootblower valve assembly according to claim 1, characterized in that: The bottom of the sealing groove (13) is provided with a buffer pad (15).

4. The boiler sootblower valve assembly according to claim 1, characterized in that: The protective valve sleeve (5) is also movably covered with a protective sleeve block (16) at one end where it is sleeved with the drive valve stem (3).

5. A boiler sootblower valve assembly according to claim 1, characterized in that: The drive valve stem (3) is also movably fixed with a limit valve sleeve block (17).

6. A boiler sootblower valve assembly according to claim 1, characterized in that: The side wall of the valve disc core block (4) is provided with a wear-resistant ring (18).

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