Blind plate valve for smelting flue gas pipeline

Abstract

The utility model relates to the technical field of blind plate valves, and provides a blind plate valve for a smelting flue gas pipeline, which comprises a valve body, two ends of the valve body are respectively communicated with a gas inlet pipe and a gas outlet pipe, the top end of the valve body is detachably and hermetically connected with a top plate, and the bottom end of the valve body is detachably and hermetically connected with a bottom plate. A blind plate which is buckled on a pipe opening of the air inlet pipe in a sealing mode is arranged in the valve body, an ejector rod used for pushing the blind plate to abut against the pipe opening of the air inlet pipe is movably connected to the valve body in a sealing mode, and a locking nut is fixed to the outer wall of the air outlet pipe and is in threaded connection with a locking bolt used for pushing the ejector rod. By means of the locking nut arranged on the outer wall of the air outlet pipe and the locking bolt matched with the locking nut, the locking bolt is screwed, the ejector rod is pushed, the blind plate is pressed to the pipe opening of the air inlet pipe, cutting-off sealing can be rapidly achieved, operation is easy, the conversion efficiency of the valve is improved, the service life of the valve is prolonged, meanwhile, the top plate and the bottom plate are detachably designed, and the cleaning convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blind plate valves, in particular to a blind plate valve for a smelting flue gas pipeline. Background Art

[0002] The main component of the smelting flue gas produced during the smelting of copper concentrate in the smelting furnace and the converter blowing process is SO2, which is transported to the acid-making process through a high-temperature fan to produce sulfuric acid. The heat-insulated flue gas side is switched through the flue gas pipeline system valve to enter the purification process for desulfurization and then discharged. The sealing valve plays a vital role. After the existing sealing valve is operated in a long-term constant state in the smelting SO2 flue gas environment, condensed arsenic salt crystals will precipitate on the valve body and the valve sealing surface. It is difficult to squeeze and cut off these crystals when the valve plate rotates. The valve plate is easily stuck and the sealing and cutting effect cannot be achieved. In addition, the valve body and the pipeline are connected to form a closed space. It is impossible to enter the pipeline during the pre-repair period of the production gap to clean the arsenic salt crystals on the valve body and valve plate, that is, the valve seal leakage failure cannot be effectively and timely maintained. Utility Model Content

[0003] The utility model aims to provide a blind plate valve for a smelting fume pipeline, which solves the above-mentioned technical problems, improves the valve conversion efficiency and service life, and increases the convenience of cleaning the device.

[0004] The embodiment of the utility model is achieved through the following technical scheme: a blind plate valve for a smelting flue gas pipeline, comprising a valve body, wherein both ends of the valve body are respectively connected with an air inlet pipe and an air outlet pipe, the top end of the valve body is detachably and sealingly connected with a top plate, the bottom end of the valve body is detachably and sealingly connected with a bottom plate, a blind plate is arranged in the valve body and is sealedly buckled at the pipe opening of the air inlet pipe, a push rod for pushing the blind plate against the pipe opening of the air inlet pipe is sealingly and movably connected on the valve body, a locking nut is fixed to the outer wall of the air outlet pipe, and the locking nut is threadedly connected with a locking bolt for pushing the push rod.

[0005] Furthermore, a connecting hole is provided at the top of the valve body, a cross bar extending across the top plate is connected in the connecting hole, and a triangular wedge is provided between the cross bar and the top plate.

[0006] Furthermore, the blind plate is buckled on the end surface of the air inlet pipe and is provided with two concentrically arranged ring strips, a sealing ring is provided between the two ring strips, and the sealing ring and the two ring strips are both in contact with the inner wall of the valve body.

[0007] Preferably, the sealing ring is made of asbestos packing.

[0008] Furthermore, a lifting ring is provided at the top of the blind plate, and an avoidance cavity for avoiding the lifting ring is provided on the top plate.

[0009] Furthermore, a plurality of locking nuts are evenly arranged along the circumferential outer wall of the air outlet pipe.

[0010] Furthermore, the pushing directions of the locking bolt and the push rod are parallel to the axes of the air inlet pipe and the air outlet pipe.

[0011] The utility model has at least the following advantages and beneficial effects: by means of a locking nut and a locking bolt matched therewith arranged on the outer wall of the outlet pipe, the locking bolt is screwed to push the push rod and press the blind plate against the outlet of the air inlet pipe, so as to quickly cut off the seal and simplify the operation, thereby improving the valve conversion efficiency and service life; at the same time, the top plate and the bottom plate are detachable, which improves the convenience of cleaning the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of the structure of a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0014] Figure 2 A partial enlarged view of a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0015] Figure 3 A side view of a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0016] Figure 4 A schematic diagram of the structure of a valve body in a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0017] Figure 5 A schematic diagram of the structure of a blind plate in a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0018] Figure 6 A side cross-sectional view of a blind plate in a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0019] Figure 7 A schematic diagram of the structure of a top plate in a blind plate valve for a smelting flue gas pipeline provided by the utility model;

[0020] Icons: 1-valve body, 10-connecting hole, 11-inlet pipe, 12-outlet pipe, 13-top plate, 131-avoidance chamber, 14-bottom plate, 15-locating bolt, 2-blind plate, 21-ring strip, 22-sealing ring, 23-lifting ring, 3-top rod, 41-locking nut, 42-locking bolt, 5-cross bar, 6-triangular wedge. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example

[0024] like Figure 1-7As shown, in this embodiment, a blind plate valve for a smelting flue gas pipeline is mainly disclosed, which is simple to operate and low in cost. It includes a valve body 1, and the two ends of the valve body 1 are respectively connected to an air inlet pipe 11 and an air outlet pipe 12. The top end of the valve body 1 is detachably sealed and connected to a top plate 13, and the bottom end of the valve body 1 is detachably sealed and connected to a bottom plate 14. A blind plate 2 is provided in the valve body 1 and is sealed and buckled at the pipe opening of the air inlet pipe 11. A push rod 3 for pushing the blind plate 2 against the pipe opening of the air inlet pipe 11 is movably connected to the valve body 1. A locking nut 41 is fixed to the outer wall of the air outlet pipe 12 to lock the blind plate 2. The nut 41 is threadedly connected with a locking bolt 42 for pushing the ejector rod 3. It should be noted that the diameters of the air inlet pipe 11 and the air outlet pipe 12 are the same and coaxially arranged, and the pipe openings of the air inlet pipe 11 and the air outlet pipe 12 are flush with the inner wall of the valve body 1, which is convenient for scraping the arsenic salt crystals inside the valve body 1; the valve body 1 is a rectangular cavity structure welded with 10mm thick Q235 steel plates, the top opening of which is convenient for extracting and inserting the internal blind plate 2, and the bottom opening is convenient for regularly discharging and cleaning the arsenic salt crystals, the bottom plate 14 can be connected to the bottom end of the valve body 1 by bolts, and the blind plate 2 is convenient for removing and inserting the internal blind plate 2, and the bottom opening is convenient for regularly discharging and cleaning the arsenic salt crystals, and the bottom plate 14 can be connected to the bottom end of the valve body 1 by bolts. The plate 2 can move between the air inlet pipe 11 and the air outlet pipe 12 in the cavity of the valve body 1; specifically, a positioning bolt 15 is provided on the valve body 1 for point positioning of the position of the blind plate 2, and the positioning bolt 15 is sealed and movably connected to the push rod 3, one end of the push rod 3 is located inside the valve body 1, and the other end is located outside the valve body 1, and the locking nut 41 is used as a force fulcrum for tightening the blind plate 2; the locking nut arranged outside and the locking bolt 42 matched therewith are used to indirectly apply force to tighten the blind plate 2 through the push rod 3, so as to effectively isolate the locking bolt and the locking nut 41 from the smoke environment Contact, to avoid the connected threads being corroded and damaged by smoke, thereby increasing the service life of the structure; when the pipeline needs to be cut off and sealed, the blind plate 2 is inserted into the valve body 1, and the locking bolt 42 can be tightened with an electric wrench to push the push rod 3 to press the blind plate 2, so as to quickly achieve cutting; when the pipeline needs to be switched as a channel, the locking bolt 42 is loosened, and a crowbar is inserted between the push rod 3 and the above-mentioned positioning bolt 15 to pry open the push rod 3, release the close contact between the push rod 3 and the blind plate 2, uncover the top plate 13, take out the blind plate 2, and reseal and connect the top plate 13.

[0025] Furthermore, in the specific implementation, Figure 1 , 2 As shown in Figures 4 and 5, a connecting hole 10 is provided on the top of the valve body 1 provided in the embodiment of the utility model, and a cross bar 5 across the top plate 13 is connected in the connecting hole 10, and a triangular wedge 6 is provided between the cross bar 5 and the top plate 13. Specifically, a sealing strip in contact with the top end of the valve body 1 may be provided under the top plate 13, and the triangular wedge 6 is inserted between the cross bar 5 and the top plate 13 to press the top plate 13 against the top end of the valve body 1, thereby playing a sealing role and effectively ensuring the stability and sealing of the valve body 1.

[0026] Furthermore, in the specific implementation, Figure 2 , 5As shown in , 6, the blind plate 2 provided in the embodiment of the utility model is buckled on the end surface of the air inlet pipe 11 and is provided with two concentrically arranged ring strips 21, a sealing ring 22 is arranged between the two ring strips 21, and the sealing ring 22 and the two ring strips 21 are both in contact with the inner wall of the valve body 1; the sealing ring 22 is made of asbestos packing; specifically, the blind plate 2 can be made of a 10mm thick stainless steel plate, and its size should be ensured to be at least 5cm larger than the outer diameter of the air inlet pipe 11 and the air outlet pipe 12, the two ring strips 21 can also be made of stainless steel and welded to the blind plate 2, a groove for cooperating with the installation of the asbestos packing is formed between the two ring strips 21, and it should be ensured that the diameter of the ring strip 21 is larger than the diameter of the air inlet pipe orifice, and the ring strip 21 is coaxially arranged with the air inlet pipe orifice.

[0027] Furthermore, in the specific implementation, Figure 5-7 As shown, a lifting ring 23 is provided at the top of the blind plate 2 provided in the embodiment of the utility model, and a avoidance cavity 131 is provided on the top plate 13 for avoiding the lifting ring 23. It should be noted that the lifting ring 23 is arranged at the center position of the top of the blind plate 2 to ensure the stability of the lifting. In addition, the installation position of the cross bar 5 should avoid interference with the avoidance cavity 131.

[0028] Furthermore, in the specific implementation, Figure 1-3 As shown, the locking nuts 41 provided in the embodiment of the utility model are evenly arranged in plurality along the circumferential outer wall of the air outlet pipe 12 , and the locking force is evenly distributed to ensure the stability and sealing of the blind plate 2 .

[0029] Furthermore, in the specific implementation, Figure 1 , 2 As shown, the pushing directions of the locking bolt 42 and the push rod 3 provided in the embodiment of the utility model are parallel to the axis of the air inlet pipe 11 and the air outlet pipe 12, so as to facilitate the quick adjustment of the locking bolt 42 to push the push rod 3 against the blind plate 2.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blind plate valve for a smelting flue gas pipeline, comprising a valve body (1), wherein both ends of the valve body (1) are respectively connected to an air inlet pipe (11) and an air outlet pipe (12), wherein: The top end of the valve body (1) is detachably sealed with a top plate (13), and the bottom end of the valve body (1) is detachably sealed with a bottom plate (14). A blind plate (2) is provided inside the valve body (1) and is sealed and buckled at the pipe opening of the air inlet pipe (11). A push rod (3) is sealingly movably connected to the valve body (1) and is used to push the blind plate (2) against the pipe opening of the air inlet pipe (11). A locking nut (41) is fixed to the outer wall of the air outlet pipe (12), and the locking nut (41) is threadedly connected to a locking bolt (42) used to push the push rod (3).

2. A blind plate valve for a smelting flue gas pipeline as claimed in claim 1, characterized in that: The top of the valve body (1) is provided with a connecting hole (10), a cross bar (5) extending across the top plate (13) is connected to the connecting hole (10), and a triangular wedge (6) is provided between the cross bar (5) and the top plate (13).

3. A blind plate valve for a smelting flue gas pipeline as claimed in claim 1, characterized in that: The blind plate (2) is buckled on the end surface of the air inlet pipe (11) and is provided with two concentrically arranged ring strips (21), a sealing ring (22) is provided between the two ring strips (21), and the sealing ring (22) and the two ring strips (21) are both in contact with the inner wall of the valve body (1).

4. A blind plate valve for a smelting flue gas pipeline as claimed in claim 3, characterized in that: The sealing ring (22) is made of asbestos packing.

5. A blind plate valve for a smelting flue gas pipeline as claimed in claim 1, characterized in that: The top end of the blind plate (2) is provided with a lifting ring (23), and the top plate (13) is provided with an avoidance cavity (131) for avoiding the lifting ring (23).

6. A blind plate valve for a smelting flue gas pipeline as claimed in claim 1, characterized in that: A plurality of locking nuts (41) are evenly arranged along the circumferential outer wall of the air outlet pipe (12).

7. A blind plate valve for a smelting fume pipeline as claimed in claim 1, characterized in that: The pushing directions of the locking bolt (42) and the push rod (3) are both parallel to the axes of the air inlet pipe (11) and the air outlet pipe (12).

Images