Expansion joint for cement dust denitration equipment

Abstract

The utility model discloses an expansion joint for cement dust denitration equipment, which comprises an expansion joint body, and a dust separation pipe for shielding the inner wall of a corrugated telescopic piece section of the expansion joint body to prevent dust-containing flue gas from entering is detachably mounted in the expansion joint body. The dust separation pipe can effectively prevent dust in the flue gas from entering the corrugated telescopic piece, so that the adverse effect of the dust on the corrugated telescopic piece can be effectively reduced, and the normal work of the expansion joint is ensured; and a detachable structure is adopted, the dust isolation pipe can be detached from the expansion joint body, and the inner wall of the dust isolation pipe can be ensured to be clean by cleaning the inner side wall of the dust isolation pipe.

Description

Technical Field

[0001] The utility model relates to an expansion joint for a cement dust denitration device, belonging to the technical field of expansion joints and dust prevention technology. Background Technique

[0002] At present, the expansion joints of denitration equipment play a crucial role in the equipment, mainly used to compensate for the linear expansion or contraction caused by temperature changes or other reasons during the use of the equipment. The expansion joint can freely expand and contract according to the temperature changes during the use of the pipeline or container, thereby effectively eliminating the linear expansion or contraction caused by temperature changes. This helps to prevent the equipment from being damaged by stress concentration due to deformation or fracture. In addition, in some working conditions, the equipment may be subjected to vibration or impact, and the expansion joint can reduce or eliminate the stress and deformation caused by these vibrations or impacts. It absorbs energy through its elastic deformation and disperses and releases it to achieve the protection of the equipment.

[0003] When denitrifying cement flue gas, due to the high dust concentration and high dust viscosity in the cement flue gas, dust particles are extremely easy to adhere to the inner side wall of the expansion joint. As the dust particles continuously accumulate in the expansion section of the expansion joint, it will affect the normal expansion and contraction of the expansion section of the expansion joint, resulting in the inability of the expansion joint to be adjusted normally. Content of the Utility Model

[0004] The purpose of the utility model is to provide an expansion joint for a cement dust denitration device. Through the setting of the dust isolation pipe, the adverse effects of dust on the corrugated expansion member can be effectively reduced, and the normal operation of the expansion joint can be ensured.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An expansion joint for a cement dust denitration device, comprising an expansion joint body, and a dust isolation pipe is detachably installed inside the expansion joint body to block the inner wall of the corrugated expansion member section of the expansion joint body to prevent the dust-containing flue gas from entering.

[0007] Preferably, the expansion joint body includes a corrugated expansion member and connecting flanges arranged at both ends of the corrugated expansion member, and a plurality of limiting screws are installed around the circumferences of the two connecting flanges.

[0008] Preferably, the inner wall of the connecting flange forms a stepped structure with a large diameter facing outwards; the dust isolation pipe is inserted into the corrugated expansion member, and a first limiting ring that abuts against the stepped surface of the connecting flange is formed at one end of the dust isolation pipe, and the first limiting ring is detachably connected to the connecting flange.

[0009] Preferably, a plurality of positioning screws are arranged around the stepped surface of the connecting flange, and a plurality of positioning holes corresponding to the positioning screws are formed in the first limiting ring; the positioning screws penetrate through the corresponding positioning holes, and a locking nut for keeping the first limiting ring in contact with the stepped surface of the connecting flange is screwed on the positioning screws.

[0010] Preferably, a sealing gasket is further arranged between the joint surface of the first limiting ring and the stepped surface of the connecting flange. The sealing gasket is sleeved outside the dust separation pipe, and a plurality of through holes corresponding to the positioning holes are also formed in the sealing gasket.

[0011] Preferably, a dust-proof cover for covering the first limiting ring is screwed outside the first limiting ring.

[0012] Preferably, a second limiting ring is formed at the other end of the dust separation pipe and is in contact with the inner wall of the small-diameter end of the corresponding end connecting flange.

[0013] Preferably, a limiting ring groove is radially formed on the outer edge of the periphery of the second limiting ring, and a sealing ring for abutting against the inner wall of the small-diameter end of the corresponding end connecting flange is arranged in the limiting ring groove.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The dust separation pipe can effectively prevent the dust in the flue gas from entering the corrugated expansion joint, and further can effectively reduce the adverse effects brought by the dust to the corrugated expansion joint, ensuring the normal operation of the expansion joint;

[0016] 2. The dust separation pipe member adopts a detachable structure, and the dust separation pipe can be removed from the expansion joint body, and the inner side wall of the dust separation pipe member can be cleaned, so as to ensure the cleanliness of the inner wall of the dust separation pipe;

[0017] 3. The setting of the sealing gasket and the sealing ring ensures the dust-proof sealing performance of the dust separation pipe, and dust is not easy to enter the corrugated expansion joint from the gap between the dust separation pipe and the connecting flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of the expansion joint;

[0019] Figure 2 is an exploded schematic diagram of the local structure of the expansion joint;

[0020] Figure 3 is an exploded schematic diagram of the local structure at the dust separation pipe.

[0021] The meanings of the main reference numerals in the drawings are as follows:

[0022] 1. Corrugated expansion member, 2. Connecting flange, 3. Support ear, 4. Limiting screw, 5. Dust isolation pipe, 6. First limiting ring, 7. Second limiting ring, 8. Positioning screw, 9. Positioning hole, 10. Locking nut, 11. Sealing gasket, 12. Limiting ring groove, 13. Sealing ring, 14. Dust cover. Detailed implementation manner

[0023] The following specifically introduces the present utility model in conjunction with the drawings and embodiments.

[0024] This embodiment provides an expansion joint for a cement dust denitrification device. Refer to Figures 1-3 As shown, it includes an expansion joint body and a dust isolation pipe 5 detachably installed inside the expansion joint body and used to block the inner wall of the corrugated expansion member 1 of the expansion joint body to prevent dust-containing flue gas from entering the corrugated expansion member 1.

[0025] The expansion joint body includes a corrugated expansion member 1 and connecting flanges 2 provided at both ends of the corrugated expansion member 1. The corrugated expansion member 1 has a certain deformation ability and can adopt commonly used bellows on the market. A plurality of support ears 3 are correspondingly arranged on the outer circumferences of the two connecting flanges 2. A limiting screw 4 is horizontally inserted between two corresponding support ears 3 between the two connecting flanges 2, and anti-loosening nuts are screwed at both ends of the limiting screw 4.

[0026] The inner wall of the connecting flange 2 forms a stepped structure with a large diameter facing outwards; the dust isolation pipe 5 is inserted into the corrugated expansion member 1, and a first limiting ring 6 that abuts against the stepped surface of the connecting flange 2 is formed at one end of the dust isolation pipe 5, and a second limiting ring 7 that fits against the inner wall of the small-diameter end of the corresponding connecting flange 2 is formed at the other end of the dust isolation pipe 5. The dust-containing flue gas is led out through the dust isolation pipe 5 so that it does not pass through the gap between the corrugated expansion member 1 and the dust isolation pipe 5.

[0027] The first limiting ring 6 is detachably connected to the connecting flange 2. Specifically, a plurality of positioning screws 8 are arranged in a ring around the stepped surface of the connecting flange 2, and a plurality of positioning holes 9 corresponding to the positioning screws 8 are opened on the first limiting ring 6; the positioning screws 8 are inserted through the corresponding positioning holes 9, and locking nuts 10 are screwed on the positioning screws 8 to keep the first limiting ring 6 in contact with the stepped surface of the connecting flange 2. When it is necessary to disassemble, clean or replace the dust isolation pipe 5, unscrew the locking nut 10 and pull out the dust isolation pipe 5.

[0028] To ensure the sealing effect, a sealing gasket 11 is also provided between the mating surface of the stepped surface of the first limiting ring 6 and the connecting flange 2. The sealing gasket 11 is sleeved outside the dust isolation pipe 5, and a plurality of through holes corresponding to the positioning holes 9 are also provided on the sealing gasket 11. A limiting ring groove 12 is radially provided on the outer circumference of the second limiting ring 7, and a sealing ring 13 that abuts against the inner wall of the small-diameter end of the corresponding connecting flange 2 is provided in the limiting ring groove 12. The sealing gasket 11 and the sealing ring 13 can be closely attached to the connecting flange 2 under the extrusion of the limiting ring and the connecting flange 2, and then it can prevent dust from easily entering the corrugated telescopic member 1 through the gap between the dust isolation pipe 5 and the connecting flange 2.

[0029] To prevent the dust in the flue gas from adhering to the positioning screw 8 and the locking nut 10, a dust-proof cover 14 for covering the first limiting ring 6 is further provided outside the first limiting ring 6, and the dust-proof cover 14 also covers the positioning screw 8 and the locking nut 10 at the same time. External threads are provided on the circumferential outer side wall of the first limiting ring 6, internal threads are provided on the inner side wall of the dust-proof cover 14, and the dust-proof cover 14 is screwed outside the first limiting ring 6. Under the action of the dust-proof cover 14, it can effectively prevent the dust in the flue gas from adhering to the outside of the positioning screw 8 and the locking nut 10, thereby achieving a dust-proof effect on the positioning screw 8 and the locking nut 10.

[0030] The above are only the preferred embodiments of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the principle of the utility model patent, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the utility model patent.

Claims

1. An expansion joint for a cement dust denitration device, characterized in that, It includes an expansion joint body, and a dust isolation pipe is detachably installed inside the expansion joint body for shielding the inner wall of the corrugated expansion member of the expansion joint body to prevent dust-containing flue gas from entering.

2. The expansion joint for the cement dust denitration equipment according to claim 1, wherein The expansion joint body includes a corrugated expansion member and connecting flanges provided at both ends of the corrugated expansion member. A plurality of limiting screws are installed around the outer circumference of the two connecting flanges.

3. The expansion joint for cement dust denitration equipment according to claim 2, characterized in that, The inner wall of the connecting flange forms a stepped structure with a large diameter facing outward; the dust isolation pipe is inserted into the corrugated expansion member, and a first limiting ring that abuts against the stepped surface of the connecting flange is formed at one end of the dust isolation pipe, and the first limiting ring is detachably connected to the connecting flange.

4. The expansion joint for the cement dust denitration equipment according to claim 3, wherein, A plurality of positioning screws are arranged around on the stepped surface of the connecting flange, and a plurality of positioning holes corresponding to the positioning screws are formed in the first limiting ring; the positioning screws pass through the corresponding positioning holes, and locking nuts for keeping the first limiting ring in fit with the stepped surface of the connecting flange are screwed on the positioning screws.

5. The expansion joint for cement dust denitration equipment according to claim 4, characterized in that, A sealing gasket is further arranged between the fitting surface of the first limiting ring and the stepped surface of the connecting flange. The sealing gasket is sleeved outside the dust isolation pipe, and a plurality of through holes corresponding to the positioning holes are also formed in the sealing gasket.

6. The expansion joint for cement dust denitration equipment according to any one of claims 2-5, characterized in that, A dust-proof cover for covering the first limiting ring is also screwed outside the first limiting ring.

7. The expansion joint for the cement dust denitration equipment according to claim 3, wherein, The other end of the dust isolation pipe forms a second limiting ring that fits with the inner wall of the small-diameter end of the corresponding end connecting flange.

8. The expansion joint for the cement dust denitration equipment according to claim 7, wherein A limiting ring groove is radially formed along the outer edge of the circumference of the second limiting ring, and a sealing ring that abuts against the inner wall of the small-diameter end of the corresponding end connecting flange is arranged in the limiting ring groove.

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