Underground tank drainage device capable of preventing harmful gas from escaping

Abstract

The utility model provides an underground tank drainage device for preventing harmful gas from escaping, which comprises a liquid pouring mechanism, a liquid drainage mechanism and a peculiar smell recovery mechanism, the liquid pouring mechanism comprises a pouring pipe and an annular water seal tank at the top of the pouring pipe, and a water seal cover is arranged in the annular water seal tank; the liquid discharging mechanism comprises a water discharging pipe and a water discharging valve, and a liquid discharging horn mouth is formed in the water discharging pipe; the peculiar smell recycling mechanism comprises a recycling header pipe, a header pipe control valve is arranged on the recycling header pipe, the other end of the recycling header pipe is connected with a negative pressure fan, a recycling branch pipe is connected to the recycling header pipe, the other end of the recycling branch pipe is communicated with the side wall of the drainage pipe, and a branch pipe control valve is arranged on the recycling branch pipe. Negative pressure operation is adopted in the process that residual samples are poured into an underground tank, personnel poisoning caused by dissipation of poisonous and harmful gas in the tank in the liquid pouring process can be effectively prevented, dual protection of the valve and the water seal is adopted, the sealing condition of the water seal is clearly visible, and the device has the advantages of being simple in structure and operation, low in cost, convenient to install and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid recovery, in particular to an underground tank liquid discharge device for preventing harmful gases from escaping. Background Art

[0002] Chemical companies sample chemical liquids during daily operations, and some pumps inevitably leak small amounts of liquid (e.g., tar, wash oil, etc.) during operation. These sampled and leaked residual liquids need to be recovered and processed. The typical recovery method is to dump them into underground tanks. Because underground tanks operate under a slightly positive pressure to meet explosion-proof requirements, toxic and hazardous gases can easily escape during the dumping process, posing a risk of poisoning.

[0003] Therefore, it is particularly important to design an underground tank drainage device to prevent harmful gases from escaping. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an underground tank drainage device for preventing harmful gases from escaping, so as to prevent toxic and harmful gases in the tank from escaping and causing poisoning to personnel during the process of pouring residual samples into the underground tank.

[0005] The utility model provides an underground tank liquid discharge device for preventing harmful gas from escaping, comprising a liquid dumping mechanism, a liquid discharge mechanism and an odor recovery mechanism, wherein:

[0006] The liquid pouring mechanism includes a pouring pipe, an annular water seal groove is provided on the top edge of the pouring pipe, and a water seal cover is provided in the annular water seal groove;

[0007] The liquid discharge mechanism includes a drain pipe, the upper end of the drain pipe is connected to a drain valve, the upper end of the drain valve is connected to a dump pipe, a drainage bell mouth is provided in the drain pipe, and the lower end of the drain pipe is connected to the liquid inlet of the underground tank;

[0008] The odor recovery mechanism includes a recovery main pipe, which is connected to the air outlet of the underground tank. A main pipe control valve is provided on the recovery main pipe. The other end of the recovery main pipe is connected to the negative pressure fan. A recovery branch pipe is connected to the recovery main pipe. The other end of the recovery branch pipe is connected to the side wall of the drain pipe. A branch pipe control valve is provided on the recovery branch pipe.

[0009] Preferably, the pouring pipe is a V-shaped pipe.

[0010] Preferably, a handle is provided on the top of the water seal cover.

[0011] Preferably, the lower end of the dumping pipe is provided with a dumping pipe connecting flange ring, the upper end of the drain pipe is provided with a drain pipe connecting flange ring, and both ends of the drain valve are provided with a drain valve connecting flange ring, and the drain valve connecting flange ring is respectively connected to the dumping pipe connecting flange ring and the drain pipe connecting flange ring by bolts.

[0012] Preferably, a bell-mouth connecting flange ring is provided at the upper end of the drainage bell-mouth, and the bell-mouth connecting flange ring is provided between the drain valve connecting flange ring and the drain pipe connecting flange ring.

[0013] Preferably, a silicone sleeve is provided at the lower end of the drainage bell mouth.

[0014] Preferably, a vent pipe is connected to the underground tank, a vent pipe control valve is provided on the vent pipe, a pressure detection probe is provided in the underground tank, the pressure monitoring probe is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the main pipe control valve and the vent pipe control valve.

[0015] The working principle of the utility model: The underground tank drainage device of the utility model prevents the escape of harmful gases. When in use, the connecting branch pipe control valve is first opened before the residual liquid is dumped. At this time, under the action of the negative pressure fan, the underground tank and the drain pipe are in a slightly negative pressure state, and the outlet end of the negative pressure fan is connected to the exhaust gas treatment system. Then open the water seal cover, pour the residual liquid into the dumping pipe, open the drain valve, and drain the residual liquid into the underground tank through the drainage bell mouth and the drain pipe and into the water seal tank. Finally, close the drain valve, install the water seal cover on the top of the dumping pipe, so that the water seal short pipe on the lower side of the water seal cover is placed in the annular water seal tank, and add a certain amount of water into the water seal tank. Close the branch pipe control valve to restore the system to normal state. Under normal conditions, the main control valve is kept open to a certain degree, and nitrogen is introduced into the underground tank through the vent pipe to keep the underground tank at a certain slightly positive pressure. In addition, the air pressure in the underground tank can be detected by a pressure detection probe, and the flow of the main control valve and the vent pipe control valve can be adjusted by the controller according to the air pressure to ensure the safety of the equipment.

[0016] The beneficial effects of the present invention are as follows: The underground tank draining device of the present invention, which prevents the escape of harmful gases, operates under negative pressure during the process of pouring residual samples into the underground tank, effectively preventing the escape of toxic and harmful gases within the tank, preventing poisoning of personnel during the liquid pouring process, and eliminating the occupational disease hazards associated with this process. In addition, during daily production, dual protection of valves and water seals is adopted to prevent the escape of slightly positive pressure toxic and harmful gases, and the use of an external water seal allows for clear visibility of the sealing condition of the water seal. The device has the advantages of simple structure, low cost, easy installation, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the underground tank draining device for preventing harmful gas from escaping according to the utility model;

[0018] Figure 2 for Figure 1 Disassembly diagram of the liquid dumping mechanism and liquid discharge mechanism.

[0019] In the figure: liquid dumping mechanism 1, dumping pipe 11, annular water seal groove 12, water seal cover 13, handle 14, flange ring 15; liquid discharge mechanism 2, drain pipe 21, drain valve 22, drainage bell mouth 23, drain pipe connecting flange ring 24, drain valve connecting flange ring 25, bolt 26, bell mouth connecting flange ring 27, silicone sleeve 28; odor recovery mechanism 3, recovery main pipe 31, main pipe control valve 32, negative pressure fan 33, recovery branch pipe 34, branch pipe control valve 35, vent pipe 36, vent pipe control valve 37, pressure detection probe 38; underground tank 4. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention easier to understand, the technical solution of the present invention is now clearly and completely described in conjunction with the accompanying drawings using specific embodiments.

[0021] Example 1:

[0022] like Figure 1 and Figure 2 As shown, the underground tank drainage device for preventing the escape of harmful gases in this embodiment includes a liquid dumping mechanism 1, a liquid discharge mechanism 2 and an odor recovery mechanism 3, wherein:

[0023] The liquid pouring mechanism 1 comprises a pouring pipe 11, an annular water seal groove 12 is provided on the top edge of the pouring pipe 11, and a water seal cover 13 is provided in the annular water seal groove 12;

[0024] The liquid discharge mechanism 2 includes a drain pipe 21, the upper end of the drain pipe 21 is connected to a drain valve 22, the upper end of the drain valve 22 is connected to the dumping pipe 11, a drainage bell mouth 23 is provided in the drain pipe 21, and the lower end of the drain pipe 21 is connected to the liquid inlet of the underground tank 4;

[0025] The odor recovery mechanism 3 includes a recovery main pipe 31, which is connected to the air outlet of the underground tank 4. A main pipe control valve 32 is provided on the recovery main pipe 31. The other end of the recovery main pipe 31 is connected to a negative pressure fan 33. A recovery branch pipe 34 is connected to the recovery main pipe 31. The other end of the recovery branch pipe 34 is connected to the side wall of the drain pipe 21. A branch pipe control valve 35 is provided on the recovery branch pipe 34.

[0026] Example 2:

[0027] like Figure 1 and Figure 2As shown, the underground tank drainage device for preventing the escape of harmful gases in this embodiment includes a liquid dumping mechanism 1, a liquid discharge mechanism 2 and an odor recovery mechanism 3, wherein:

[0028] The liquid pouring mechanism 1 includes a pouring pipe 11, an annular water seal groove 12 is provided on the top edge of the pouring pipe 11, and a water seal cover 13 is provided in the annular water seal groove 12; the pouring pipe 11 is a V-shaped pipe; a handle 14 is provided on the top of the water seal cover 13; and a pouring pipe connecting flange ring 15 is provided at the lower end of the pouring pipe 11;

[0029] The liquid discharge mechanism 2 includes a drain pipe 21, the upper end of which is connected to a drain valve 22, the upper end of which is connected to the dump pipe 11, a drain bell mouth 23 is provided in the drain pipe 21, and the lower end of the drain pipe 21 is connected to the liquid inlet of the underground tank 4; a drain pipe connecting flange ring 24 is provided at the upper end of the drain pipe 21, and drain valve connecting flange rings 25 are provided at both ends of the drain valve 22, and the drain valve connecting flange rings 25 are respectively connected to the dump pipe connecting flange ring 14 and the drain pipe connecting flange ring 24 by bolts 26; a bell mouth connecting flange ring 27 is provided at the upper end of the drain bell mouth 23, and the bell mouth connecting flange ring 27 is provided between the drain valve connecting flange ring 25 and the drain pipe connecting flange ring 24; and a silicone sleeve 28 is provided at the lower end of the drain bell mouth 23.

[0030] The odor recovery mechanism 3 includes a recovery main pipe 31, which is connected to the air outlet of the underground tank 4. A main pipe control valve 32 is provided on the recovery main pipe 31. The other end of the recovery main pipe 31 is connected to the negative pressure fan 33. The recovery main pipe 31 is connected to a recovery branch pipe 34. The other end of the recovery branch pipe 34 is connected to the side wall of the drain pipe 21. A branch pipe control valve 35 is provided on the recovery branch pipe 34; a ventilation pipe 36 is connected to the underground tank 4, and a ventilation pipe control valve 37 is provided on the ventilation pipe 36. A pressure detection probe 38 is provided in the underground tank 4. The pressure monitoring probe is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the main pipe control valve 32 and the ventilation pipe control valve 37.

[0031] It should be noted that the embodiments described herein are only some embodiments of the present invention, not all implementations of the present invention. The embodiments are merely illustrative and serve only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that can be thought of by ordinary technicians in this field without creative work, as well as other simple replacements and various variations of the technical solutions of the present invention, are within the scope of protection of the present invention.

Claims

1. An underground tank drainage device for preventing the escape of harmful gases, characterized in that: It comprises a liquid pouring mechanism (1), a liquid discharging mechanism (2) and an odor recovery mechanism (3), wherein: The liquid pouring mechanism (1) comprises a pouring pipe (11), an annular water seal groove (12) is provided on the top edge of the pouring pipe (11), and a water seal cover (13) is provided in the annular water seal groove (12); The liquid discharge mechanism (2) includes a drain pipe (21), the upper end of the drain pipe (21) is connected to a drain valve (22), the upper end of the drain valve (22) is connected to a dump pipe (11), a drain bell mouth (23) is provided in the drain pipe (21), and the lower end of the drain pipe (21) is connected to the liquid inlet of the underground tank (4); The odor recovery mechanism (3) comprises a main recovery pipe (31), which is connected to the air outlet of the underground tank (4), a main pipe control valve (32) is provided on the main recovery pipe (31), the other end of the main recovery pipe (31) is connected to the negative pressure fan (33), a recovery branch pipe (34) is connected to the main recovery pipe (31), the other end of the recovery branch pipe (34) is communicated with the side wall of the drain pipe (21), and a branch pipe control valve (35) is provided on the recovery branch pipe (34).

2. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: The pouring pipe (11) is a V-shaped pipe.

3. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: A handle (14) is provided on the top of the water seal cover (13).

4. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: The lower end of the dumping pipe (11) is provided with a dumping pipe connecting flange ring (15), the upper end of the drain pipe (21) is provided with a drain pipe connecting flange ring (24), and both ends of the drain valve (22) are provided with drain valve connecting flange rings (25). The drain valve connecting flange rings (25) are respectively connected to the dumping pipe connecting flange ring (14) and the drain pipe connecting flange ring (24) through bolts (26).

5. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: The upper end of the liquid discharge bell mouth (23) is provided with a bell mouth connecting flange ring (27), and the bell mouth connecting flange ring (27) is arranged between the drain valve connecting flange ring (25) and the drain pipe connecting flange ring (24).

6. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: A silicone sleeve (28) is provided at the lower end of the liquid discharge bell mouth (23).

7. The underground tank draining device for preventing harmful gas from escaping according to claim 1, characterized in that: The underground tank (4) is connected to a vent pipe (36), a vent pipe control valve (37) is provided on the vent pipe (36), a pressure detection probe (38) is provided in the underground tank (4), the pressure monitoring probe is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the main pipe control valve (32) and the vent pipe control valve (37).

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