A factory ventilation system

Abstract

The utility model relates to the technical field of factory ventilation, and in particular to a factory ventilation system, comprising a first exhaust duct, a second exhaust duct, a three-way pipe, a bypass branch, a first electric regulating valve, an exhaust fan and a second electric regulating valve, wherein one end of the first exhaust duct, one end of the second exhaust duct, and one end of the bypass branch are respectively inserted into the three ports of the three-way pipe and fixedly connected by bolts, the first exhaust duct and the second exhaust duct form a main air duct through the three-way pipe, and the bypass branch is a hose; the first electric regulating valve is fixedly arranged on one end of the first exhaust duct close to the three-way pipe; the utility model proposes a factory ventilation system, which adjusts the air intake of the exhaust fan by arranging a bypass branch on the main air duct, so as to overcome the problem that the exhaust fan is prone to malfunction when the exhaust volume demand in the factory is small.

Description

Technical Field

[0001] The utility model relates to the technical field of factory ventilation, in particular to a factory ventilation system. Background Art

[0002] The factory ventilation system generally includes air vents, air valves, ventilation ducts, exhaust vents and exhaust fans. In the exhaust state, the air in the factory enters the ventilation duct from the air vents, and then is discharged from the factory from the exhaust vents.

[0003] During the operation of the factory ventilation system, if the air inlet of the exhaust fan is blocked, it is easy to cause the exhaust fan to malfunction. The reason is: when the air inlet of the exhaust fan is blocked, the load and operating temperature of the exhaust fan will increase, making the exhaust fan in a dangerous working state, which will increase the temperature rise of the exhaust fan winding, reduce the insulation strength, and cause the motor winding to short-circuit, thereby causing a malfunction.

[0004] The actual exhaust volume of the factory is adjusted according to the needs. When the exhaust volume demand in the factory is small, the flow of the air valve at the air outlet needs to be reduced. However, when the flow of the air valve is reduced, the flow in the ventilation duct and the air intake of the exhaust fan will also decrease. In this case, the above-mentioned failure of the exhaust fan is likely to occur. Utility Model Content

[0005] In view of this, the utility model proposes a factory ventilation system, which adjusts the air intake of the exhaust fan by setting a bypass branch on the main air duct to overcome the problem that the exhaust fan is prone to malfunction when the exhaust volume demand in the factory is small.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides a factory ventilation system, comprising a first exhaust duct, a second exhaust duct, a three-way pipe, a bypass branch pipe, a first electric regulating valve, an exhaust fan and a second electric regulating valve, wherein:

[0008] One end of the first exhaust duct, one end of the second exhaust duct, and one end of the bypass branch pipe are respectively inserted into the three ports of the tee pipe and fixedly connected by bolts. The first exhaust duct and the second exhaust duct form a main duct through the tee pipe, and the bypass branch pipe is a hose;

[0009] The first electric regulating valve is fixedly arranged on one end of the first exhaust pipe close to the three-way pipe;

[0010] The exhaust fan is fixedly arranged on one end of the second exhaust pipe away from the three-way pipe;

[0011] The second electric regulating valve is fixedly arranged on one end of the bypass branch pipe away from the three-way pipe.

[0012] On the basis of the above technical solution, preferably, it also includes a mesh guard plate, wherein:

[0013] The mesh guard plate is detachably provided with two pieces inside the second exhaust duct;

[0014] The exhaust fan is arranged inside the second exhaust duct and between the two mesh guard plates.

[0015] On the basis of the above technical solution, preferably, the first exhaust pipe, the second exhaust pipe and the adjacent ends of the bypass branch pipe are fixedly provided with a first flange, and the three ports of the three-way pipe are fixedly provided with a second flange, wherein:

[0016] The second flange is fixedly connected to the corresponding first flange by bolts.

[0017] On the basis of the above technical solution, preferably, it also includes a rubber pad, wherein:

[0018] The rubber pad is fixedly arranged on one end of the first flange close to the three-way pipe.

[0019] On the basis of the above technical solution, preferably, the rubber pad is clamped and fixed between the port of the three-way pipe and the first flange.

[0020] On the basis of the above technical solution, preferably, the rubber pad is clamped and fixed between the first flange and the second flange.

[0021] On the basis of the above technical solution, preferably, the bypass branch pipe is a hose.

[0022] On the basis of the above technical solution, preferably, it also includes an air collecting pipe and an air intake grille, wherein:

[0023] The air collecting pipe is fixedly arranged at one end of the first exhaust pipe away from the three-way pipe and is in communication with the first exhaust pipe;

[0024] The air intake grille is detachably arranged on and connected to the air collecting pipe.

[0025] On the basis of the above technical solution, preferably, a groove is provided at the bottom of the air collecting pipe, and the air intake grille is embedded in the groove.

[0026] On the basis of the above technical solution, preferably, the second exhaust pipe comprises a diameter reducing portion, a connecting portion and an exhaust portion, wherein:

[0027] The diameter-changing portion is fixedly arranged between the connecting portion and the exhaust portion;

[0028] The outer diameter of the reducing portion is smaller than the outer diameter of the connecting portion, and the outer diameter of the connecting portion is equal to the outer diameter of the exhaust portion;

[0029] One end of the reducing portion is plugged into one end of the three-way pipe;

[0030] The reducing portion is fixedly connected to the corresponding first flange;

[0031] The exhaust fan is arranged inside the diameter-changing portion.

[0032] On the basis of the above technical solution, preferably, the exhaust fan is an axial flow fan.

[0033] Compared with the prior art, the plant ventilation system of the utility model has the following beneficial effects:

[0034] (1) By setting a bypass branch on the main air duct, the air intake of the exhaust fan can be adjusted to overcome the problem of exhaust fan failure when the exhaust volume demand in the factory is small.

[0035] (2) One end of the first exhaust duct, one end of the second exhaust duct, and one end of the bypass branch pipe are respectively inserted into the three ports of the tee pipe and fixedly connected with bolts, thereby improving the air tightness of the pipes after connection.

[0036] (3) By setting the bypass branch pipe as a hose, the layout of the bypass branch pipe is facilitated.

[0037] (4) By providing a rubber pad to be clamped and fixed between the port of the tee pipe and the first flange or by providing a rubber pad to be clamped and fixed between the first flange and the second flange, the air tightness of each pipe after connection is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a plan view of a factory ventilation system of the utility model;

[0040] Figure 2 This is a schematic diagram of the installation structure of the three-way pipe of the utility model;

[0041] Figure 3 For the utility model Figure 2 A cross-sectional view of

[0042] Figure 4For the utility model Figure 2 Exploded diagram of

[0043] Figure 5 It is a schematic diagram of another installation structure of the three-way pipe of the utility model;

[0044] In the figure: 1. first exhaust duct; 2. second exhaust duct; 3. three-way pipe; 4. bypass branch pipe; 5. first electric regulating valve; 6. exhaust fan; 7. second electric regulating valve; 8. mesh guard plate; 9. rubber pad; 10. air collecting duct; 11. air intake grille; 101. first flange; 102. second flange; 201. reducing part; 202. connecting part; 203. exhaust part, groove 1001. DETAILED DESCRIPTION

[0045] The following will be combined with the specific implementation of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figure 1-5 As shown, a factory ventilation system of the utility model includes a first exhaust duct 1, a second exhaust duct 2, a three-way pipe 3, a bypass branch pipe 4, a first electric regulating valve 5, an exhaust fan 6 and a second electric regulating valve 7.

[0047] Among them, one end of the first exhaust duct 1, one end of the second exhaust duct 2, and one end of the bypass branch pipe 4 are respectively inserted into the three ports of the tee pipe 3 and fixedly connected by bolts. The first exhaust duct 1 and the second exhaust duct 2 form a main air duct through the tee pipe 3. The main air duct is the ventilation pipeline of the original ventilation system in the factory. During the later transformation, the original ventilation pipeline is cut off, and the cut-off ventilation pipeline forms the above-mentioned first exhaust duct 1 and second exhaust duct 2. The tee pipe 3 is installed at the cut-off position, and the first exhaust duct 1, the second exhaust duct 2, and the bypass branch pipe 4 are connected through the tee pipe 3. The end of the bypass branch pipe 4 away from the tee pipe 3 is arranged outside or inside the factory.

[0048] The first electric regulating valve 5 is fixedly arranged on one end of the first exhaust duct 1 close to the three-way pipe 3, and is used to adjust the air volume entering the main air duct. When the exhaust volume required in the factory is small, the flow rate of the first electric regulating valve 5 is reduced, and vice versa, the flow rate of the first electric regulating valve 5 is increased. Specifically, the first exhaust duct 1 and the adjacent ends of the second exhaust duct 2 and the bypass branch pipe 4 are fixedly provided with a first flange 101, and the three ports of the three-way pipe 3 are fixedly provided with a second flange 102. The second flange 102 and the first flange 101 are both provided with bolt mounting holes, such as Figure 2As shown, the bolt mounting hole is used to install the long axis bolt. During installation, the second flange 102 and the corresponding first flange 101 are fixedly connected by bolts. In the above structure, one end of the first exhaust duct 1, one end of the second exhaust duct 2, and one end of the bypass branch pipe 4 are respectively inserted into the three ports of the tee pipe 3 and fixedly connected with bolts, which is convenient for improving the air tightness after the pipeline is connected and facilitating the installation of the bypass branch pipe 4. During installation, it is only necessary to cut off the original main ventilation duct in the factory building, and install the tee pipe 3 and the bypass branch pipe 4 at the cut-off point. The process is relatively simple and convenient, which is convenient for the later transformation of the factory building ventilation system.

[0049] The exhaust fan 6 is fixedly arranged on one end of the second exhaust duct 2 away from the three-way pipe 3. The exhaust fan 6 is a fixed-frequency axial flow fan. When the exhaust fan 6 is powered on, it sucks the air in the factory through the main air duct and discharges it.

[0050] The second electric regulating valve 7 is fixedly arranged on one end of the bypass branch pipe 4 away from the three-way pipe 3, and is used for adjusting the air volume entering the bypass branch pipe 4. When the system is running in the factory building, when the exhaust air volume demand in the factory building is small, the flow rate of the first electric regulating valve 5 is reduced, and then the flow rate of the second electric regulating valve 7 is increased, so that the air volume entering the second exhaust duct 2 is increased, and the air suction volume of the exhaust fan 6 is ensured to be at a normal level, so as to overcome the problem that the exhaust fan 6 is prone to malfunction when the exhaust air volume demand in the factory building is small. On the contrary, when the exhaust air volume demand in the factory building is large, the flow rate of the first electric regulating valve 5 is increased, and then the flow rate of the second electric regulating valve 7 is reduced, or the second electric regulating valve 7 is closed.

[0051] Small animals can easily enter the ventilation duct. In order to prevent the small animals from being harmed and to prevent the small animals from damaging the exhaust fan 6, a mesh guard plate 8 is provided in the duct. Specifically, the mesh guard plate 8 is detachably provided with two pieces inside the second exhaust duct 2. The exhaust fan 6 is provided inside the second exhaust duct 2 and between the two mesh guard plates 8. Safety protection is achieved by means of the two mesh guard plates 8 to avoid the occurrence of the above-mentioned problems. The mesh guard plate 8 is installed in the duct with bolts for easy disassembly and assembly.

[0052] In order to improve air tightness and prevent air leakage, a plant ventilation system of the utility model further includes a rubber pad 9, wherein the rubber pad 9 is fixedly arranged on one end of the first flange 101 close to the three-way pipe 3. Two embodiments of the rubber pad 9 are provided below:

[0053] In the first embodiment, the rubber pad 9 is clamped and fixed between the port of the tee pipe 3 and the first flange 101. Figure 3 As shown, after one end of the tee pipe 3 and one end of the bypass branch pipe 4 are plugged in, the corresponding first flange 101 and the second flange 102 are fixedly connected using bolts. After the fixed connection, the end of the tee pipe 3 is pressed against the rubber pad 9 to form a seal, and the installation method of the other two ends of the tee pipe 3 is the same as the above method.

[0054] In the second embodiment, the rubber pad 9 is clamped and fixed between the first flange 101 and the second flange 102. Figure 5 As shown, after one end of the tee pipe 3 and one end of the bypass branch pipe 4 are plugged in, the corresponding first flange 101 and the second flange 102 are fixedly connected using bolts. At this time, the rubber pad 9 is clamped and fixed between the first flange 101 and the second flange 102 to form a seal, and the installation method of the other two ends of the tee pipe 3 is the same as the above method.

[0055] Due to the limitation of the plant layout, the bypass branch pipe 4 is greatly restricted during laying. To solve this problem, the bypass branch pipe 4 can be set as a hose to facilitate the arrangement of the bypass branch pipe 4.

[0056] In addition, the above-mentioned factory ventilation system also includes an air collecting duct 10 and an air intake grille 11, wherein the air collecting duct 10 is fixedly arranged at one end of the first exhaust duct 1 away from the three-way pipe 3 and is connected, and the air intake grille 11 is detachably arranged on the air collecting duct 10 and is connected, and the air intake grille 11 is arranged inside the factory for connecting the air inside the factory. Specifically, a groove 1001 is arranged at the bottom of the air collecting duct 10, and the air intake grille 11 is embedded in the groove 1001.

[0057] In order to improve the exhaust effect of the exhaust fan 6, the second exhaust duct 2 includes a reducing portion 201, a connecting portion 202 and an exhaust portion 203, wherein the reducing portion 201 is fixedly arranged between the connecting portion 202 and the exhaust portion 203, the outer diameter of the reducing portion 201 is smaller than the outer diameter of the connecting portion 202, the outer diameter of the connecting portion 202 is equal to the outer diameter of the exhaust portion 203, one end of the reducing portion 201 is plugged into one end of the three-way pipe 3, the reducing portion 201 and the corresponding first flange 101 are fixedly connected, and the exhaust fan 6 is arranged inside the reducing portion 201. The second exhaust duct 2 of this shape is beneficial to improving the air collecting effect of the air inlet end of the exhaust fan 6, and is also beneficial to improving the air outlet effect of the air outlet end of the exhaust fan 6.

[0058] The method of using the plant ventilation system of the utility model is as follows:

[0059] The above-mentioned factory building ventilation system is suitable for the construction of ventilation systems of new factories, and is also suitable for the renovation of ventilation systems of old factories. When the original ventilation system of the factory building needs to be renovated, the original ventilation ducts in the factory building are cut off, and the cut-off ventilation ducts form the above-mentioned first exhaust duct 1 and second exhaust duct 2. The three-way pipe 3 is installed between the first exhaust duct 1 and the second exhaust duct 2 at the cut-off point, and the first exhaust duct 1, the second exhaust duct 2, and the bypass branch pipe 4 are connected through the three-way pipe 3. After installation, the renovation is completed.

[0060] When the system is running in a factory building, when the exhaust volume demand in the factory building is relatively small, the flow rate of the first electric regulating valve 5 is reduced, and then the flow rate of the second electric regulating valve 7 is increased, so that the air volume entering the second exhaust duct 2 is increased, ensuring that the air suction volume of the exhaust fan 6 is at a normal level, so as to overcome the problem that the exhaust fan 6 is prone to malfunction when the exhaust volume demand in the factory building is relatively small. Conversely, when the exhaust volume demand in the factory building is relatively large, the flow rate of the first electric regulating valve 5 is increased, and then the flow rate of the second electric regulating valve 7 is reduced, or the second electric regulating valve 7 is closed.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A factory ventilation system, characterized in that: It comprises a first exhaust pipe (1), a second exhaust pipe (2), a three-way pipe (3), a bypass branch pipe (4), a first electric regulating valve (5), an exhaust fan (6) and a second electric regulating valve (7), wherein: One end of the first exhaust duct (1), one end of the second exhaust duct (2), and one end of the bypass branch pipe (4) are respectively inserted into the three ports of the three-way pipe (3) and fixedly connected by bolts; the first exhaust duct (1) and the second exhaust duct (2) form a main air duct through the three-way pipe (3); and the bypass branch pipe (4) is a hose; The first electric regulating valve (5) is fixedly arranged on one end of the first exhaust pipe (1) close to the three-way pipe (3); The exhaust fan (6) is fixedly arranged on an end of the second exhaust pipe (2) away from the three-way pipe (3); The second electric regulating valve (7) is fixedly arranged on one end of the bypass branch pipe (4) away from the three-way pipe (3).

2. A factory ventilation system according to claim 1, characterized in that: It also includes a net guard plate (8), wherein: The net guard plate (8) is detachably provided in two pieces inside the second exhaust duct (2); The exhaust fan (6) is arranged inside the second exhaust pipe (2) and between the two mesh protective plates (8).

3. A factory ventilation system as claimed in claim 2, characterized in that: First flanges (101) are fixedly provided on adjacent ends of the first exhaust pipe (1), the second exhaust pipe (2) and the bypass branch pipe (4), and second flanges (102) are fixedly provided on three ports of the three-way pipe (3), wherein: The second flange (102) and the corresponding first flange (101) are fixedly connected by bolts.

4. A factory ventilation system as claimed in claim 3, characterized in that: It also includes a rubber pad (9), wherein: The rubber pad (9) is fixedly arranged on one end of the first flange (101) close to the three-way pipe (3).

5. A factory ventilation system as claimed in claim 4, characterized in that: The rubber pad (9) is clamped and fixed between the port of the three-way pipe (3) and the first flange (101).

6. A factory ventilation system as claimed in claim 5, characterized in that: The rubber pad (9) is clamped and fixed between the first flange (101) and the second flange (102).

7. A factory ventilation system according to claim 5 or 6, characterized in that: It also includes an air collecting pipe (10) and an air intake grille (11), wherein: The air collecting pipe (10) is fixedly arranged at an end of the first exhaust pipe (1) away from the three-way pipe (3) and is in communication with the first exhaust pipe (1); The air intake grille (11) is detachably arranged on and connected to the air collecting pipe (10).

8. A factory ventilation system according to claim 7, characterized in that: The bottom of the air collecting pipe (10) is provided with a groove (1001), and the air intake grille (11) is embedded in the groove (1001).

9. A factory ventilation system as claimed in claim 3, characterized in that: The second exhaust pipe (2) comprises a diameter-reducing portion (201), a connecting portion (202) and an exhaust portion (203), wherein: The diameter-changing portion (201) is fixedly arranged between the connecting portion (202) and the exhaust portion (203); The outer diameter of the diameter-changing portion (201) is smaller than the outer diameter of the connecting portion (202), and the outer diameter of the connecting portion (202) is equal to the outer diameter of the exhaust portion (203); One end of the reducing portion (201) is plugged into one end of the three-way pipe (3); The diameter reducing portion (201) and the corresponding first flange (101) are fixedly connected; The exhaust fan (6) is arranged inside the diameter-changing portion (201).

10. A factory ventilation system according to claim 9, characterized in that: The exhaust fan (6) is an axial flow fan.

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