Leak-proof device for shaft seal of carbon black fan

Abstract

The utility model relates to the technical field of dust removal fan equipment, in particular to a carbon black fan shaft seal leakproof device which comprises a base, a driving device and a fan, the driving device and the fan are both fixedly connected to the top of the base, the driving device is connected to one end of the fan in a transmission mode, the other end of the fan is fixedly connected with an inlet pipe, and the inlet pipe is connected with the base. The draught fan comprises a shaft seal, the top end of the shaft seal and the top end of the inlet pipe are fixedly connected with an adjusting circulation device, and the interior of the adjusting circulation device is communicated with the interior of the inlet pipe. The principle that gas flows along the pressure difference is utilized in the whole structure of the adjusting circulation device, the structure is simple, field welding is achieved, and manufacturing is convenient; the adjusting circulation device is good in leakage prevention effect, leaked carbon black powder is concentrated in the dust hood, outward leakage is effectively reduced, improvement of the surrounding environment is facilitated, the transparent hose serves as a replaceable part, the replacement time is short, the cost is low, and the production period cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal fan equipment, in particular to a carbon black fan shaft seal anti-leakage device. Background Art

[0002] In the carbon black system, dust removal fans represented by packaged dust removal fans and equipment dust removal fans may leak carbon black powder at the shaft seal during use. The existing dust removal fan shaft seals generally use packing seals. Since the transported gas medium contains fine carbon black dust, the shaft seal is not tightly sealed and it is easy to leak at the shaft seal, causing pollution to the surrounding environment and having a great impact on the health of surrounding workers. Utility Model Content

[0003] In order to improve the sealing performance of the shaft seal and prevent the leakage of carbon black dust, the utility model provides a carbon black blower shaft seal anti-leakage device.

[0004] The utility model provides a carbon black fan shaft seal anti-leakage device adopts the following technical solutions:

[0005] A carbon black blower shaft seal anti-leakage device comprises a base, a drive device and a blower, wherein the drive device and the blower are both fixedly connected to the top of the base, the drive device is transmission-connected to one end of the blower, and the other end of the blower is fixedly connected to an inlet pipe. The blower comprises a shaft seal, and the shaft seal and the top end of the inlet pipe are fixedly connected to a regulating circulation device, and the interior of the regulating circulation device is communicated with the interior of the inlet pipe.

[0006] By adopting the above technical solution, the carbon black leaked from the fan shaft seal returns to the inlet pipe of the fan through the regulating circulation device and then re-enters the fan. The principle that gas flows along the pressure difference is utilized, and the structure is relatively simple. The steel pipe of the regulating circulation device can be welded on site and connected to the fan. The connection is convenient and quick. Compared with dedicated special seals, there is no need to lengthen the main shaft, increase the inflation and cooling systems, and the production cost is low. The connecting pipe of the regulating circulation device is a replaceable component with a short replacement time and low cost, which will not affect the production period.

[0007] Preferably, the regulating circulation device includes two regulating valves, a connecting pipe and a dust cover, and both ends of the two regulating valves are threadedly connected to steel pipes, wherein the other ends of the two steel pipes are fixedly connected to the two ends of the connecting pipe respectively.

[0008] Preferably, the connecting pipe is located above the two regulating valves.

[0009] By adopting the above technical solution, it is convenient for workers to see the internal situation of the connecting pipe at any position around the fan. When the connecting pipe is blocked, it is helpful for workers to clear the connecting pipe as soon as possible to avoid excessive pressure inside the regulating circulation device and the explosion of the connecting pipe.

[0010] Preferably, the dust hood is fixedly connected to the outer surface of the shaft seal, and the other end of one of the steel pipes is fixedly connected to the top end of the dust hood.

[0011] By adopting the above technical solution and utilizing the pressure difference, the leakage prevention effect is better. The carbon black leaked in the dust hood enters one of the stainless steel ball valves, passes through the connecting pipe, enters another stainless steel ball valve, and then enters the inlet pipe and re-enters the fan.

[0012] Preferably, both ends of the two regulating valves are internal threads, both ends of the four steel pipes are external threads, and the other end of one of the steel pipes is fixedly connected to the top end of the inlet pipe.

[0013] By adopting the above technical solution, the inner thread and the outer thread are adapted to each other, and the inner thread and the outer thread are connected by threads, which facilitates the replacement of the steel pipe and the transparent hose.

[0014] Preferably, the diameter of the two regulating valves is larger than the diameter of the steel pipe, and both of the two regulating valves are stainless steel ball valves.

[0015] By adopting the above technical solution, since the stainless steel ball valve is adjusted according to the different operating conditions of the fan, the size of the path for the passage of carbon black is different in different conditions. In order to avoid clogging of the stainless steel ball valve, the diameter of the inner wall of the ball valve is larger than the diameter of the inner wall of the steel pipe.

[0016] Preferably, the connecting pipe is a transparent hose.

[0017] By adopting the above technical solution, when the transparent hose is clogged multiple times due to a large amount of carbon black attached, the thread can be loosened to remove the steel pipe with the transparent hose between the two regulating valves, and a new steel pipe with a transparent hose can be screwed into the two regulating valves. The old transparent hose with a large amount of carbon black attached can be cleaned and dried after washing for replacement and use next time, which is low in cost and easy to maintain.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. This device is equipped with a regulating circulation device. The driving device drives the fan to work. The fan inlet is negative pressure, and the inside of the dust hood is slightly positive pressure. By utilizing the pressure difference between the front and back, the leaked carbon black powder will be sucked into the fan inlet pipe along the pipeline direction of the regulating circulation device and re-enter the fan. The regulating circulation device includes a regulating valve, a connecting pipe and a steel pipe. The steel pipe can be welded to the fan on site. The entire structure of the regulating circulation device utilizes the principle that gas flows along the pressure difference. The structure is simple and easy to weld and manufacture on site. The regulating circulation device has a good anti-leakage effect. The leaked carbon black powder is concentrated in the dust hood, effectively reducing external leakage and helping to improve the surrounding environment.

[0020] 2. This device is provided with a transparent hose. If the transparent hose is clogged, you can manually pinch the hose to eliminate the blockage. When the transparent hose is clogged multiple times due to a lot of carbon black, you can loosen the thread, remove the steel pipe with the transparent hose between the two regulating valves, and screw a new steel pipe with the transparent hose onto the two regulating valves. The old transparent hose with a lot of carbon black can be cleaned and dried for replacement next time. It is low in cost and easy to maintain. Compared with special seals, there is no need to lengthen the main shaft, add inflation, cooling and other systems, and the production cost is low. As a replaceable component, the transparent hose has a short replacement time and low cost, and will not affect the production period.

[0021] 3. This device is equipped with two regulating valves. When the connecting pipe needs to be replaced, close the two regulating valves, seal the dust hood and the top of the inlet pipe, and then replace the connecting pipe. The two regulating valves can also be used to adjust the pressure difference inside the connecting pipe, which is convenient for replacing the hose and enables the device to play a better regulating role. At the same time, the diameter of the regulating valve is larger than the diameter of the steel pipe, which is helpful to prevent carbon black powder from clogging in the pipeline of the regulating circulation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a carbon black blower shaft seal anti-leakage device of the utility model;

[0023] Figure 2 yes Figure 1 A-direction view in;

[0024] Figure 3 yes Figure 1 A magnified schematic diagram of the local structure at point B in the middle;

[0025] Figure 4 This is a structural diagram of a regulating circulation device in a carbon black blower shaft seal anti-leakage device of the utility model;

[0026] Figure 5 It is a structural diagram of a dust removal fan shaft seal in the background technology.

[0027] Explanation of the accompanying symbols: 1. Base; 2. Driving device; 3. Fan; 4. Inlet pipe; 5. Shaft seal; 6. Regulating valve; 7. Connecting pipe; 8. Steel pipe; 9. Dust hood. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 5 The utility model is described in further detail.

[0029] The embodiment of the utility model discloses a carbon black blower shaft seal anti-leakage device.

[0030] Reference Figure 1 、 Figure 2 、 Figure 5 , including a base 1, a driving device 2 and a fan 3. The driving device 2 and the fan 3 are fixedly connected to the top of the base 1. The driving device 2 adopts a motor and a reducer to drive the fan 3 to work, so that a negative pressure is formed at the inlet pipe 4 of the fan 3, the pressure is about -2000Pa, and a slightly positive pressure is formed inside the dust collection hood 9. The driving device 2 is transmission-connected to one end of the fan 3, and the other end of the fan 3 is fixedly connected to the inlet pipe 4. The fan 3 includes a shaft seal 5, and the shaft seal 5 and the top end of the inlet pipe 4 are fixedly connected with a regulating circulation device. The interior of the regulating circulation device is connected to the interior of the inlet pipe 4. The leaked carbon black powder returns to the inlet pipe 4 of the fan 3 through the regulating circulation device and re-enters the fan 3, effectively reducing the leakage of carbon black powder and improving the surrounding environment.

[0031] Reference Figure 1 、 Figure 3 、 Figure 4 The regulating circulation device includes two regulating valves 6, a connecting pipe 7 and a dust cover 9. Both ends of the two regulating valves 6 are threadedly connected to steel pipes 8, and the other ends of the two steel pipes 8 are fixedly connected to the two ends of the connecting pipe 7 respectively.

[0032] Reference Figure 1 、 Figure 2 The connecting pipe 7 is located above the two regulating valves 6. The connecting pipe 7 is located at a higher position, which is convenient for the staff to visually check the situation inside the connecting pipe 7 in any direction around the fan 3.

[0033] Reference Figure 1 、 Figure 3 、 Figure 4 The dust cover 9 is fixedly connected to the outer surface of the shaft seal 5, and the leaked carbon black powder is concentrated in the dust cover 9, which has a good leak-proof effect and reduces leakage to the outside. The other end of one of the steel pipes 8 is fixedly connected to the top of the dust cover 9.

[0034] Reference Figure 1 、 Figure 3Both ends of the two regulating valves 6 are internal threads, and both ends of the four steel pipes 8 are external threads. The internal threads are compatible with the external threads and can be threadedly connected, which makes it convenient to replace the steel pipe 8 with a transparent hose. The replacement time is short and the cost is low, and it will not affect the production period. The other end of one of the steel pipes 8 is fixedly connected to the top of the inlet pipe 4. The steel pipe 8 located below the two regulating valves 6 is welded to the top of the inlet pipe 4 and the dust hood 9, respectively, to facilitate the carbon black powder in the dust hood 9 to enter the inlet pipe 4.

[0035] Reference Figure 1 、 Figure 3 、 Figure 4 The diameter of the two regulating valves 6 is larger than the diameter of the steel pipe 8. Both regulating valves 6 are made of stainless steel ball valves. When the connecting pipe 7 needs to be replaced, the two regulating valves 6 are closed, the dust cover 9 and the top of the inlet pipe 4 are sealed, and the connecting pipe 7 is replaced. The two regulating valves 6 can also be used to adjust the pressure difference inside the connecting pipe 7.

[0036] Reference Figure 4 The connecting pipe 7 adopts a transparent hose, through which the carbon black in the pipeline can be clearly seen. When the carbon black blocks the transparent hose, the staff can manually pinch the transparent hose to squeeze the carbon black, thereby clearing the transparent hose.

[0037] The implementation principle of the carbon black blower shaft seal anti-leakage device in the embodiment of the utility model is:

[0038] Since the inlet of the fan 3 is at negative pressure, about -2000Pa, and the inside of the dust hood 9 is at slightly positive pressure, the leaked carbon black powder will enter the first regulating valve 6 along the steel pipe 8 in the dust hood 9, and then enter the connecting pipe 7, and then enter the second regulating valve 6, and finally be sucked into the inlet pipe 4 connected to the fan 3, thereby achieving the purpose of preventing leakage.

[0039] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A carbon black blower shaft seal anti-leakage device, characterized by: The invention comprises a base (1), a driving device (2) and a fan (3), wherein the driving device (2) and the fan (3) are both fixedly connected to the top of the base (1), the driving device (2) is drivingly connected to one end of the fan (3), the other end of the fan (3) is fixedly connected to an inlet pipe (4), the fan (3) comprises a shaft seal (5), and the top ends of the shaft seal (5) and the inlet pipe (4) are fixedly connected to a regulating circulation device, and the interior of the regulating circulation device is connected to the interior of the inlet pipe (4).

2. A carbon black blower shaft seal anti-leakage device according to claim 1, characterized in that: The regulating circulation device comprises two regulating valves (6), a connecting pipe (7) and a dust collecting hood (9), wherein both ends of the two regulating valves (6) are threadedly connected to steel pipes (8), wherein the other ends of the two steel pipes (8) are respectively fixedly connected to both ends of the connecting pipe (7).

3. The carbon black blower shaft seal anti-leakage device according to claim 2, characterized in that: The connecting pipe (7) is located above the two regulating valves (6).

4. The carbon black blower shaft seal anti-leakage device according to claim 3, characterized in that: The dust hood (9) is fixedly connected to the outer surface of the shaft seal (5), and the other end of one of the steel pipes (8) is fixedly connected to the top end of the dust hood (9).

5. The carbon black blower shaft seal anti-leakage device according to claim 4, characterized in that: Both ends of the two regulating valves (6) are internal threads, and both ends of the four steel pipes (8) are external threads, and the other end of one of the steel pipes (8) is fixedly connected to the top end of the inlet pipe (4).

6. The carbon black blower shaft seal anti-leakage device according to claim 5, characterized in that: The diameter of the two regulating valves (6) is greater than the diameter of the steel pipe (8), and the two regulating valves (6) are both stainless steel ball valves.

7. The carbon black blower shaft seal anti-leakage device according to claim 6, characterized in that: The connecting pipe (7) is a transparent hose.

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