Active pressure relief device for fresh chute

Abstract

The utility model relates to an active pressure relief device for a fresh chute, which belongs to the technical field of pressure relief devices and comprises a fresh chute, an exhaust box and an active pressure relief branch pipe are arranged on the fresh chute, the fresh chute is communicated with a purification system flue through the active pressure relief branch pipe, and an active pressure relief box is mounted on the active pressure relief branch pipe. A slidable pressure relief plate is arranged in the active pressure relief box, and a spring for resetting the pressure relief plate is arranged at the rear end of the pressure relief plate; according to the active pressure relief device for the fresh chute, when the pressure relief effect of the exhaust box cloth bag becomes poor, pressure can be actively relieved, meanwhile, a worker is reminded to overhaul the exhaust box cloth bag, the discharge efficiency of redundant gas in the chute is improved, and therefore it is guaranteed that feeding of the fresh chute is stable and uniform, the purification efficiency is improved, and it is guaranteed that environmental protection data reach the standard.

Description

Technical Field

[0001] The utility model relates to an active pressure relief device for a fresh chute, belonging to the technical field of pressure relief devices. Background Art

[0002] Super dense phase conveying system is commonly used in electrolytic cell production workshops, mainly to complete the automatic feeding of electrolytic cells, the feeding of fresh alumina in the flue gas purification system and the recovery of fluorine-containing alumina. The fresh chute is the main component of the super dense phase conveying system. The fresh chute consists of a material chamber, an air chamber, a breathable plate, a sealing pad, etc. The breathable plate separates the air chamber from the material chamber. The gas entering from the air chamber enters the material chamber evenly through the breathable plate to transport the material.

[0003] The fresh chute pressure relief of the flue gas purification system is mainly completed by the exhaust box on the top of the chute. The exhaust box is equipped with a bag to filter and purify the gas before discharging it to avoid environmental pollution. However, after a long period of operation, the air permeability of the bag becomes poor, the pressure relief effect is poor, and the excess gas in the chute cannot be discharged in time, resulting in difficulty in feeding the fresh chute, seriously affecting the stability of the fresh alumina feeding of the flue gas purification system, causing large fluctuations in environmental data or exceeding the standard. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide an active pressure relief device for a fresh chute, which can actively relieve pressure when the pressure relief effect of the exhaust box bag deteriorates, thereby ensuring the stability of the fresh chute feeding and reminding the staff to inspect and repair the exhaust box bag.

[0005] The active pressure relief device for a fresh chute described in the utility model comprises a fresh chute, on which an exhaust box and an active pressure relief branch pipe are arranged, the fresh chute is connected with the flue of the purification system through the active pressure relief branch pipe, an active pressure relief box is installed on the active pressure relief branch pipe, a slidable pressure relief plate is arranged in the active pressure relief box, and a spring is arranged at the rear end of the pressure relief plate for resetting it.

[0006] The technical solution of the utility model is to provide an active pressure relief device for a fresh chute. When the exhaust box bag operates normally, the spring presses the pressure relief plate against the pressure relief box shell to keep the active pressure relief box closed. When the air permeability of the bag deteriorates, the air pressure in the fresh chute increases, overcoming the spring pressure to open the active pressure relief box, thereby connecting the fresh chute to the flue of the purification system. The negative pressure in the flue of the purification system can reach about -800 Pa. Under the action of the negative pressure, the excess gas in the fresh chute is actively sucked into the purification system to achieve a pressure relief effect.

[0007] Preferably, the active pressure relief box comprises a pressure relief box shell, the inlet size of the pressure relief box shell is smaller than the outlet size, the inlet is provided with an inwardly protruding folded edge, and a U-shaped sealing strip is fixed to the edge of the folded edge for sealing with the pressure relief plate.

[0008] Furthermore, a guide column is installed on the inlet end surface of the pressure relief box shell, a spring is sleeved on the guide column, and a baffle is installed at the end of the guide column to prevent the spring from sliding off the guide column.

[0009] Preferably, a guide sleeve is installed on the pressure relief plate, the guide sleeve is sleeved on the guide column, and the spring is located between the guide sleeve and the baffle.

[0010] Furthermore, a proximity switch is installed on the inlet end face of the pressure relief box shell, and an alarm light is installed on one side of the pressure relief box shell. The proximity switch and the alarm light are electrically connected to the electronic control system; when the active pressure relief box is in a closed state, the proximity switch detects the pressure relief plate and the alarm light does not work. When the active pressure relief box is in an open state, the proximity switch cannot detect the pressure relief plate and the alarm light sounds.

[0011] Preferably, an inspection cover is provided on the top of the pressure relief box housing, the inspection cover is hinged to the pressure relief box housing through a hinge, and a lock buckle for locking is provided on the inspection cover.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The active pressure relief device for the fresh chute described in the utility model can actively relieve pressure when the pressure relief effect of the exhaust box bag becomes poor, and at the same time remind the staff to inspect and repair the exhaust box bag to improve the discharge efficiency of excess gas in the chute, thereby ensuring that the fresh chute is fed smoothly and evenly, improving the purification efficiency, and ensuring that environmental protection data meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is one of the structural diagrams of the active pressure relief box;

[0016] Figure 3 This is the second structural diagram of the active pressure relief box;

[0017] Figure 4 It is a cross-sectional view of the active pressure relief tank.

[0018] In the figure: 1. Exhaust box; 2. Fresh chute; 3. Purification system flue; 4. Active pressure relief branch pipe; 5. Warning light; 6. Active pressure relief box; 61. Pressure relief box shell; 62. Inspection cover; 63. Pressure relief plate; 64. Baffle; 65. Folding edge; 66. Proximity switch; 67. Guide column; 68. Guide sleeve; 69. Spring. DETAILED DESCRIPTION

[0019] like Figure 1-4As shown, this embodiment is implemented through the following technical scheme: it includes a fresh chute 2, on which an exhaust box 1 and an active pressure relief branch pipe 4 are provided, the fresh chute 2 is connected to the flue 3 of the purification system through the active pressure relief branch pipe 4, an active pressure relief box 6 is installed on the active pressure relief branch pipe 4, a slidable pressure relief plate 63 is provided in the active pressure relief box 6, and a spring 69 is provided at the rear end of the pressure relief plate 63 for resetting it.

[0020] In this embodiment, the active pressure relief box 6 comprises a pressure relief box housing 61, the inlet size of the pressure relief box housing 61 is smaller than the outlet size, the inlet is provided with an inwardly protruding folded edge 65, the edge of the folded edge 65 is fixed with a U-shaped sealing strip for sealing with the pressure relief plate 63; a guide column 67 is installed on the inlet end face of the pressure relief box housing 61, a spring 69 is sleeved on the guide column 67, and a baffle 64 is installed at the end of the guide column 67 to prevent the spring from sliding off the guide column. A guide sleeve 68 is installed on the pressure relief plate 63, the guide sleeve 68 is sleeved on the guide column 67, and the spring 69 is located between the guide sleeve 68 and the baffle 64.

[0021] A proximity switch 66 is installed on the inlet end face of the pressure relief box housing 61, and an alarm light 5 is installed on one side of the pressure relief box housing 61; the utility model also includes an electric control system, and the proximity switch 66 and the alarm light 5 are electrically connected to the electric control system; when the active pressure relief box 6 is in a closed state, the proximity switch 66 detects the pressure relief plate 63, and the alarm light 5 does not work; when the active pressure relief box 6 is in an open state, the proximity switch 66 cannot detect the pressure relief plate 63, and the alarm light 5 alarms. An inspection cover 62 is provided on the top of the pressure relief box housing 61, and the inspection cover 62 is hinged to the pressure relief box housing 61 through a hinge, and a lock for locking is provided on the inspection cover 62.

[0022] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A fresh chute active pressure relief device, characterized in that: The invention comprises a fresh chute (2), an exhaust box (1) and an active pressure relief branch pipe (4) are arranged on the fresh chute (2), the fresh chute (2) is connected with a flue (3) of a purification system through the active pressure relief branch pipe (4), an active pressure relief box (6) is installed on the active pressure relief branch pipe (4), a slidable pressure relief plate (63) is arranged in the active pressure relief box (6), and a spring (69) for resetting the pressure relief plate (63) is arranged at the rear end of the pressure relief plate (63).

2. The active pressure relief device for the fresh chute according to claim 1, characterized in that: The active pressure relief box (6) comprises a pressure relief box shell (61), the inlet size of the pressure relief box shell (61) is smaller than the outlet size, the inlet is provided with an inwardly protruding folded edge (65), and a U-shaped sealing strip for sealing with the pressure relief plate is fixed to the edge of the folded edge (65).

3. The active pressure relief device for the fresh chute according to claim 2, characterized in that: A guide column (67) is installed on the inlet end surface of the pressure relief box housing (61), a spring (69) is sleeved on the guide column (67), and a baffle (64) is installed at the end of the guide column (67) to prevent the spring from sliding off.

4. The active pressure relief device for the fresh chute according to claim 3, characterized in that: The pressure relief plate (63) is provided with a guide sleeve (68), the guide sleeve (68) is sleeved on the guide column (67), and the spring (69) is located between the guide sleeve (68) and the baffle (64).

5. The active pressure relief device for the fresh chute according to claim 2, characterized in that: A proximity switch (66) is installed on the inlet end surface of the pressure relief box housing (61), and an alarm light (5) is installed on one side of the pressure relief box housing (61). Both the proximity switch (66) and the alarm light (5) are electrically connected to the electric control system.

6. The active pressure relief device for the fresh chute according to claim 5, characterized in that: The top of the pressure relief box housing (61) is provided with an inspection cover (62), the inspection cover (62) is hinged to the pressure relief box housing (61) via a hinge, and a lock buckle for locking is provided on the inspection cover (62).

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