Special valve for discharging ash and slag

Abstract

The utility model discloses a kind of special valves for unloading ash and discharging slag, it is related to valve technical field, main purpose is to effectively solve the problem of valve material accumulation, gate sealing is not strict in time.This utility model's main technical scheme is as follows: special valve for unloading ash and discharging slag, it includes: valve body;The valve body is provided with gate and valve rod in it, the valve rod is connected to the gate, for driving the gate relative to the valve body sealing surface moves up and down;Wherein, the valve body sealing surface above the valve body is equipped with first purging hole, the valve body sealing surface below the valve body is equipped with second purging hole.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a special valve for unloading ash and slag. Background Technology

[0002] The existing coal gasification inlet and slag discharge valves, due to the transportation of granular materials and dust, suffer from material accumulation at the bottom of the original gate valves, preventing the valve plate from closing properly. The maintenance process after material accumulation is very complicated. At the same time, since granular materials are being transported, the presence of granular materials on the sealing surface not only results in poor sealing but also accelerates wear on the sealing surface, leading to a short service life. Leaks occur after only a few valve openings and closings, posing significant safety hazards and labor intensity to production and maintenance. Furthermore, large-scale leakage necessitates shutdown for replacement or repair, which has a significant impact on production. Utility Model Content

[0003] In view of this, the present invention provides a special valve for unloading ash and slag, the main purpose of which is to solve the problems of material accumulation in valves and poor sealing of gate plates in a timely and effective manner.

[0004] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0005] This utility model provides a special valve for unloading ash and slag, which includes: a valve body;

[0006] The valve body is provided with a gate and a valve stem, and the valve stem is connected to the gate to drive the gate to move up and down relative to the sealing surface of the valve body;

[0007] The valve body above the sealing surface is provided with a first purge hole, and the valve body below the sealing surface is provided with a second purge hole.

[0008] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0009] Optionally, the valve body below the valve body sealing surface is provided with a slag discharge groove, and the second purging hole is provided on the side wall of the slag discharge groove.

[0010] Optionally, the bottom wall of the slag discharge trough is provided with slag discharge holes.

[0011] Optionally, the gate is a single-sided sealing wedge-shaped gate, and the orientation of the first purge hole is perpendicular to the sealing surface of the gate.

[0012] Optionally, the sealing surface of the gate is a hard alloy sealing surface that has been overlaid.

[0013] Optionally, the side wall of the slag discharge trough near the valve body sealing surface is a first side wall, and the second purge hole is disposed on the first side wall.

[0014] Optionally, the sidewall of the slag discharge trough away from the valve body sealing surface is a second sidewall, and the distance between the second sidewall and the first sidewall is greater than the thickness of the gate.

[0015] By employing the above technical solution, this utility model has at least the following advantages:

[0016] Before the valve is closed, the gate is located above the valve body sealing surface, and the first purge hole is directly opposite the gate. Nitrogen gas is blown into the valve body through the first purge hole to purge the gate sealing surface and the valve body sealing surface. This keeps the sealing surface clean when the valve is closed, resulting in good valve sealing performance.

[0017] A second purging hole is provided in the valve body below the valve body sealing surface. Nitrogen gas is used to purge the bottom of the valve body regularly to keep the bottom clean and free of slag, thus preventing the gate from failing to close properly. Attached Figure Description

[0018] Figure 1 A cross-sectional view of a special valve for unloading ash and slag provided in an embodiment of this utility model.

[0019] The reference numerals in the accompanying drawings include: valve body 1, gate 2, valve stem 3, first purge hole 4, second purge hole 5, slag discharge trough 6, and slag discharge hole 7. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, an embodiment of this utility model provides a special valve for unloading ash and slag, which includes: valve body 1;

[0023] The valve body 1 is provided with a gate plate 2 and a valve stem 3. The valve stem 3 is connected to the gate plate 2 and is used to drive the gate plate 2 to move up and down relative to the sealing surface of the valve body 1.

[0024] The valve body 1 above the sealing surface is provided with a first purge hole 4, and the valve body 1 below the sealing surface is provided with a second purge hole 5.

[0025] The working process of a special valve for ash and slag discharge is as follows:

[0026] Before the valve is closed, the gate 2 is located above the sealing surface of the valve body 1, and the first purge hole 4 is directly opposite the gate 2. Nitrogen gas is blown into the valve body 1 through the first purge hole 4 to purge the sealing surface of the gate 2 and the sealing surface of the valve body 1. When the valve is closed, the sealing surface can be kept clean, and the valve sealing performance is good.

[0027] A second purge hole 5 is provided in the valve body 1 below the sealing surface of the valve body 1. Nitrogen gas is used to purge the bottom of the valve body 1 regularly to keep the bottom clean and free of slag, so as to prevent the gate 2 from not closing properly.

[0028] In the technical solution of this utility model, nitrogen gas is periodically blown in from above and below the sealing surface of the valve body 1 in the above manner to avoid material accumulation in the valve and to prevent the gate plate 2 from not sealing properly.

[0029] Specifically, it also includes a first purge pipe and a second purge pipe. The first purge pipe is connected to the first purge port 4 and is equipped with a first regulating valve. The second purge pipe is connected to the second purge port 5 and is equipped with a second regulating valve. The purge pressure of nitrogen is controlled by controlling the opening of the first regulating valve and the second regulating valve.

[0030] In a specific embodiment, the valve body 1 below the sealing surface is provided with a slag discharge groove 6, and the second purging hole 5 is provided on the side wall of the slag discharge groove 6.

[0031] In this embodiment, specifically, the second purge hole 5 is located on the side wall of the slag discharge trough 6 below the sealing surface of the valve body 1. This prevents the second purge hole 5 from affecting the flatness of the sealing surface of the valve body 1. At the same time, when the sealing surface of the gate plate 2 and the sealing surface of the valve body 1 are in contact, there is a gap between the lower end of the gate plate 2 and the bottom wall of the slag discharge trough 6, making the slag discharge trough 6 a space for material accumulation buffering. This prevents the lower end of the gate plate 2 from squeezing the accumulated material, and also facilitates the blowing of nitrogen gas through the second purge hole 5 to remove the accumulated material in the slag discharge trough 6 in a timely manner.

[0032] In a specific embodiment, the bottom wall of the slag discharge trough 6 is provided with slag discharge holes 7.

[0033] In this embodiment, specifically as an auxiliary measure to the nitrogen purging method, the operator can periodically remove the screws at the slag discharge hole 7 to discharge the accumulated material and check the condition of the valve body 1.

[0034] In a specific embodiment, the gate 2 is a single-sided sealing wedge-shaped gate 2, and the orientation of the first purge hole 4 is perpendicular to the sealing surface of the gate 2.

[0035] In this embodiment, specifically, before closing the valve, the gate 2 is located above the sealing surface of the valve body 1, and the first purge hole 4 is directly opposite the sealing surface of the gate 2. The nitrogen gas blown into the valve body 1 through the first purge hole 4 directly impacts the sealing surface of the gate 2, which can keep the sealing surface of the gate 2 clean to a large extent.

[0036] In a specific embodiment, the sealing surface of the gate 2 is a hard alloy sealing surface welded on.

[0037] In this embodiment, specifically, cemented carbide has the advantages of high hardness, good wear resistance, and corrosion resistance, which provides a strong guarantee for the sealing of the valve.

[0038] In a specific embodiment, the side wall of the slag discharge trough 6 near the sealing surface of the valve body 1 is the first side wall, and the second purge hole 5 is disposed on the first side wall.

[0039] In this embodiment, specifically, the side where the sealing surface of the valve body 1 is located is the material inflow side of the valve body 1. When the valve is closed, the nitrogen gas blown in through the second purge hole 5 drives the material deposited in the slag discharge tank 6 to flow towards the discharge port of the valve, thereby preventing the material from depositing at the sealing surface of the valve body 1 and avoiding material waste.

[0040] In a specific embodiment, the side wall of the slag discharge trough 6 away from the sealing surface of the valve body 1 is the second side wall, and the distance between the second side wall and the first side wall is greater than the thickness of the gate plate 2.

[0041] In this embodiment, specifically, when the valve is closed, the sealing surface of the gate plate 2 and the sealing surface of the valve body 1 are in contact with each other. At the same time, since the distance between the second side wall and the first side wall is greater than the thickness of the gate plate 2, there is a gap between the second side wall and the gate plate 2. This gap serves as a passage for the deposited material to flow backward. The nitrogen gas blown in by the second purge hole 5 can force the deposited material to flow through this passage to the pipe behind the valve.

[0042] Specifically, the second sidewall has a certain slope, which facilitates the flow of sediment in the slag discharge tank 6 along the inclined second sidewall to the pipeline behind the valve.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A special valve for unloading ash and slag, characterized in that, include: The valve body is provided with a gate and a valve stem. The valve stem is connected to the gate and is used to drive the gate to move up and down relative to the sealing surface of the valve body. The valve body above the sealing surface is provided with a first purge hole, and the valve body below the sealing surface is provided with a second purge hole.

2. The special valve for ash and slag discharge according to claim 1, characterized in that, The valve body below the sealing surface is provided with a slag discharge groove, and the second purging hole is provided on the side wall of the slag discharge groove.

3. The special valve for ash and slag discharge according to claim 2, characterized in that, The bottom wall of the slag discharge trough is provided with slag discharge holes.

4. The special valve for ash and slag discharge according to claim 1, characterized in that, The gate is a single-sided sealing wedge-shaped gate, and the orientation of the first purge hole is perpendicular to the sealing surface of the gate.

5. The special valve for ash and slag discharge according to claim 4, characterized in that, The sealing surface of the gate is a hard alloy sealing surface welded on.

6. The special valve for ash and slag discharge according to claim 2, characterized in that, The side wall of the slag discharge trough near the sealing surface of the valve body is the first side wall, and the second purging hole is disposed on the first side wall.

7. The special valve for ash and slag discharge according to claim 6, characterized in that, The side wall of the slag discharge trough away from the valve body sealing surface is the second side wall, and the distance between the second side wall and the first side wall is greater than the thickness of the gate.

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