Positive pressure type explosion-proof motor

Abstract

The utility model discloses a positive pressure type explosion-proof motor, which relates to the technical field of explosion-proof motors and comprises a shell, two support frames are arranged at the bottom of the shell and symmetrically distributed on two sides of the bottom of the shell respectively, a motor main body is arranged in the shell, a rotating shaft is arranged in the middle of the motor main body, and the rotating shaft is connected with the motor main body. A sealing assembly is arranged on the side face of the shell and comprises a mounting frame, a fixing side plate is arranged on the side face of the mounting frame, a limiting assembly is arranged in the middle of the fixing side plate, a positioning ring is arranged in the mounting frame, and a sealing ring is arranged in the positioning ring. The sealing rings are slidably connected to the interior of the positioning ring through the protruding blocks, the two limiting lug plates are limited through the annular limiting ring, and therefore the two sealing rings can seal the joint of the shell and the rotating shaft, the sealing effect is improved through the two sealing rings, and the sealing effect is improved. The practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof motors, in particular to a positive pressure explosion-proof motor. Background Art

[0002] In petrochemical, metallurgical, cement and other factories, a large amount of dust or flammable gas is prone to appear in the working environment. The high concentration of dust or flammable gas in the air makes these places flammable and explosive, especially easy to be ignited by open flames or sparks. However, a large amount of power needs to be provided in these places, so large high-voltage motors are generally installed. The difference between high-voltage motors and low-voltage motors is that their rated voltage is higher than 1000V. The total working cost of high-voltage motors is lower, and the small current flowing through them reduces their losses, which can significantly reduce production costs in the long run. Since high-voltage motors operate at high voltage, electric sparks are easily generated during normal operation, which can easily detonate flammable and explosive media in the air. Therefore, high-voltage motors used in flammable and explosive environments are generally explosion-proof.

[0003] Most of the existing positive pressure explosion-proof motors maintain a continuous flow of air or inert gas inside to limit the flammable mixture from entering the shell when in use, thereby preventing the formation of a flammable mixture inside the shell and causing an explosion. Therefore, a sealed connection between the rotating shaft and the shell is required. However, the sealing device in the prior art is not convenient to disassemble and repair during use. Therefore, it is necessary to provide a positive pressure explosion-proof motor to solve the problem. Summary of the invention

[0004] The main purpose of the utility model is to provide a positive pressure explosion-proof motor, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a positive pressure explosion-proof motor, comprising a shell, a support frame is arranged at the bottom of the shell, and there are two support frames, which are symmetrically distributed on both sides of the bottom of the shell, a motor body is arranged inside the shell, and a rotating shaft is arranged in the middle of the motor body, and a sealing component is arranged on the side of the shell; the sealing component comprises a mounting frame, a fixed side plate is arranged on the side of the mounting frame, a limiting component is arranged in the middle of the fixed side plate, a positioning ring is arranged inside the mounting frame, and a sealing ring is arranged inside the positioning ring, a protrusion is arranged in the middle of the sealing ring, and a limiting ear plate is arranged at one end of the sealing ring; the limiting component comprises a blocking plate, a threaded plate is arranged on the side of the blocking plate, an ejector rod is arranged on the side of the threaded plate, and a connecting spring is arranged on the outside of the ejector rod.

[0006] Preferably, the mounting frame is fixedly connected to the outer shell, and the mounting frame is sleeved on the outside of the rotating shaft, the mounting frame is connected to the fixed side plate by bolts, and the fixed side plate is located on the side of the mounting frame away from the outer shell, the mounting frame is fixedly connected to the positioning ring, and the two ends of the positioning ring are respectively in contact with the outer shell and the fixed side plate.

[0007] Preferably, a sliding groove is provided on the inner wall of the positioning ring, and there are four sliding grooves, which are symmetrically distributed on the inner wall of the positioning ring, and the sliding groove runs through both ends of the positioning ring. An annular limiting ring is provided inside the positioning ring, and there are two annular limiting rings, which are distributed in sequence inside the side of the positioning ring away from the outer shell.

[0008] Preferably, a sealing ring is provided inside the positioning ring, and the sealing ring is arranged in a semi-circular shape, the inner wall of the sealing ring is tightly fitted with the outer wall of the rotating shaft, and the outer wall of the sealing ring is tightly fitted with the inner wall of the positioning ring, there are four sealing rings, two in a group, and every two sealing rings are arranged corresponding to an annular limiting ring.

[0009] Preferably, the sealing ring is fixedly connected to the protrusion, and the protrusion is located in the middle of the outer wall of the sealing ring. The sealing ring is fixedly connected to the limiting ear plate, and the limiting ear plate is set to be half of the protrusion. There are two limiting ear plates, which are symmetrically distributed at the two ends of the bottom of the sealing ring. The protrusion and the limiting ear plate are correspondingly slidably connected inside the slide groove and the annular limiting ring.

[0010] Preferably, the sealing ring has an annular groove fixedly connected to one side close to the threaded plate, and a clamping block fixedly connected to the side of the sealing ring away from the threaded plate, wherein the clamping block facing the side of one sealing ring is inserted into the annular groove on the side of the other sealing ring.

[0011] Preferably, the sealing plate is in contact with the side of the fixed side plate, the side of the sealing plate close to the positioning ring pair is fixedly connected to the threaded plate, a threaded ring is provided on the inner wall of the side of the positioning ring close to the sealing plate, and the threaded plate is connected to the threaded ring, the side of the threaded plate away from the sealing plate is fixedly connected to the ejector rod, and there are four ejector rods, which are evenly distributed on the side of the threaded plate.

[0012] Preferably, one end of the ejector rod away from the threaded plate is in contact with the side of the sealing ring, and a limiting groove is provided on the side of the sealing ring close to the sealing plate, the ejector rod is connected to the inside of the limiting groove by bolts, the ejector rod and the connecting spring are sleeved together, and the connecting spring and the ejector rod are arranged correspondingly, and the two ends of the connecting spring are in contact with the side of the threaded plate and the side of the sealing ring respectively.

[0013] Compared with the prior art, the utility model has the following beneficial effects: 1. The sealing ring is slidably connected to the inside of the positioning ring through the provided protrusion, and the two limiting ear plates are limited by the provided annular limiting ring, so that the two sealing rings can seal the connection between the outer shell and the rotating shaft. The two sets of sealing rings are used to improve the sealing effect and increase the practicality of the device; 2. The ejector rod is connected to the sealing ring to achieve the removal of the sealing ring. When used in conjunction with the slide groove and the annular limiting ring, the sealing ring is easy to disassemble and replace, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall stereogram of the device of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the shell of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the cross section of the sealing component of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the sealing component of the utility model;

[0018] Figure 5 This utility model Figure 4 Schematic diagram of the structure enlarged at point A in the middle.

[0019] In the figure: 1. support frame; 2. housing; 3. motor body; 4. rotating shaft; 5. sealing assembly; 6. mounting frame; 7. fixed side plate; 8. positioning ring; 9. slide groove; 10. annular limit ring; 11. sealing ring; 12. bump; 13. limit ear plate; 14. limit assembly; 15. blocking plate; 16. threaded plate; 17. ejector rod; 18. limit groove; 19. connecting spring; 20. threaded ring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figure 1-Figure 5 As shown, a positive pressure explosion-proof motor comprises a housing 2, a support frame 1 is arranged at the bottom of the housing 2, two support frames 1 are arranged, and they are symmetrically distributed on both sides of the bottom of the housing 2, a motor body 3 is arranged inside the housing 2, and a rotating shaft 4 is arranged in the middle of the motor body 3, and a sealing assembly 5 is arranged on the side of the housing 2;

[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the sealing assembly 5 includes a mounting frame 6, a fixed side plate 7 is arranged on the side of the mounting frame 6, a limiting assembly 14 is arranged in the middle of the fixed side plate 7, a positioning ring 8 is arranged inside the mounting frame 6, and a sealing ring 11 is arranged inside the positioning ring 8, a convex block 12 is arranged in the middle of the sealing ring 11, and a limiting ear plate 13 is arranged at one end of the sealing ring 11, the mounting frame 6 is fixedly connected to the housing 2, and the mounting frame 6 is sleeved on the outside of the rotating shaft 4, the mounting frame 6 is connected to the fixed side plate 7 by bolts, and the fixed side plate 7 is located on the side of the mounting frame 6 away from the housing 2, and the mounting frame 6 and the positioning ring 8 are fixedly connected to the housing 2. The positioning ring 8 is fixedly connected, and the two ends of the positioning ring 8 are in contact with the housing 2 and the fixed side plate 7 respectively. A slide groove 9 is provided on the inner wall of the positioning ring 8, and there are four slide grooves 9, which are symmetrically distributed on the inner wall of the positioning ring 8. The slide groove 9 runs through the two ends of the positioning ring 8. An annular limiting ring 10 is provided inside the positioning ring 8, and there are two annular limiting rings 10, which are sequentially distributed inside the side of the positioning ring 8 away from the housing 2. A sealing ring 11 is provided inside the positioning ring 8, and the sealing ring 11 is semi-circular. The inner wall of the sealing ring 11 is tightly fitted with the outer wall of the rotating shaft 4, and the outer wall of the sealing ring 11 It fits tightly with the inner wall of the positioning ring 8. There are four sealing rings 11, two of which are in a group, and every two sealing rings 11 are correspondingly arranged with an annular limiting ring 10. The sealing ring 11 is fixedly connected with the protrusion 12, and the protrusion 12 is located in the middle of the outer wall of the sealing ring 11. The sealing ring 11 is fixedly connected with the limiting ear plate 13, and the limiting ear plate 13 is set as one-half of the protrusion 12. There are two limiting ear plates 13, which are symmetrically distributed at the two ends of the bottom of the sealing ring 11. The protrusion 12 and the limiting ear plate 13 are correspondingly slidably connected in the slide groove 9 and the inner part of the annular limiting ring 10. The sealing ring 11 is close to the thread One side of the plate 16 is fixedly connected with an annular groove, and the side of the sealing ring 11 away from the threaded plate 16 is fixedly connected with a block, and the block facing the side of one sealing ring 11 is inserted into the annular groove on the side of the other sealing ring 11, and the sealing ring 11 is slidably connected to the inside of the positioning ring 8 through the provided protrusion 12, and the two limiting ear plates 13 are limited by the provided annular limiting ring 10, so that the two sealing rings 11 can achieve the sealing of the connection between the housing 2 and the rotating shaft 4. The two sets of sealing rings 11 are provided to improve the sealing effect and increase the practicality of the device;

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the limiting assembly 14 includes a blocking plate 15, a threaded plate 16 is provided on the side of the blocking plate 15, an ejector rod 17 is provided on the side of the threaded plate 16, and a connecting spring 19 is provided on the outside of the ejector rod 17, the blocking plate 15 contacts the side of the fixed side plate 7, and the side of the blocking plate 15 close to the positioning ring 8 is fixedly connected to the threaded plate 16, the inner wall of the positioning ring 8 close to the blocking plate 15 is provided with a threaded ring 20, and the threaded plate 16 is connected to the threaded ring 20, the side of the threaded plate 16 away from the blocking plate 15 is fixedly connected to the ejector rod 17, and there are four ejector rods 17, which are evenly distributed on the sides of the threaded plate 16, and the ejector rods 17 are far away from the blocking plate 15. One end away from the threaded plate 16 is in contact with the side of the sealing ring 11, and a limiting groove 18 is provided on the side of the sealing ring 11 close to the blocking plate 15. The ejector rod 17 is connected to the inside of the limiting groove 18 by bolts. The ejector rod 17 and the connecting spring 19 are sleeved together, and the connecting spring 19 is correspondingly arranged with the ejector rod 17. The two ends of the connecting spring 19 are respectively in contact with the side of the threaded plate 16 and the side of the sealing ring 11. The ejector rod 17 is connected to the sealing ring 11 through the arranged ejector rod 17, so as to realize the removal of the sealing ring 11. It is used in conjunction with the slide groove 9 and the annular limiting ring 10 to facilitate the disassembly and replacement of the sealing ring 11, thereby improving the convenience of using the device.

[0024] It should be noted that the utility model is a positive pressure explosion-proof motor. When in use, the block on the side of one of the sealing rings 11 is clamped into the annular groove on the side of the other sealing ring 11, so that the two sets of sealing rings 11 are clamped together, and then the inner walls of the two sealing rings 11 are connected with the outer wall of the rotating shaft 4, and the protrusion 12 in the middle of the outer wall of the sealing ring 11 and the limiting ear plates 13 at both ends are aligned with the slide groove 9 on the inner wall of the positioning ring 8, and the two sealing rings 11 are pushed to make the protrusion 12 and the limiting ear plates 13 slide along the slide groove 9. When the limiting ear plates 13 slide into the inside of the slide groove 9, the limiting connection of the two sealing rings 11 is realized, so that two of the sealing rings 11 are pushed to the inside of the annular limiting ring 10 on the side of the positioning ring 8 close to the shell 2, and then the other two The sealing ring 11 repeats the above operation and is installed inside the positioning ring 8. The two groups of sealing rings 11 are arranged in a cross shape, and then the sealing plate 15 and the threaded plate 16 are in contact with the side of the fixed side plate 7. The sealing plate 15 is rotated to connect the threaded plate 16 to the inside of the positioning ring 8 along the threaded ring 20. The ejector rod 17 on the side of the threaded plate 16 is connected to the inside of the limiting groove 18 by bolts to achieve the connection of the sealing ring 11. During the rotation process, the sealing ring 11 is pushed to slide inside the slide groove 9, so that the sealing ring 11 corresponds to the annular limiting ring 10 on the side of the positioning ring 8 close to the threaded plate 16. The sealing plate 15 and the threaded plate 16 are rotated again, so that the ejector rod 17 drives the two groups of sealing rings 11 to rotate along the annular limiting ring 10, thereby achieving sealing of the device.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A positive pressure explosion-proof motor, comprising a housing (2), Features: A support frame (1) is arranged at the bottom of the housing (2); two support frames (1) are symmetrically distributed on both sides of the bottom of the housing (2); a motor body (3) is arranged inside the housing (2); a rotating shaft (4) is arranged in the middle of the motor body (3); a sealing component (5) is arranged on the side of the housing (2); the sealing component (5) comprises a mounting frame (6); a fixed side plate (7) is arranged on the side of the mounting frame (6); a limit position component (14) is arranged in the middle of the fixed side plate (7) The installation frame (6) is provided with a positioning ring (8) inside, and a sealing ring (11) is provided inside the positioning ring (8), a protrusion (12) is provided in the middle of the sealing ring (11), and a limiting ear plate (13) is provided at one end of the sealing ring (11); the limiting assembly (14) comprises a blocking plate (15), a threaded plate (16) is provided on the side of the blocking plate (15), an ejector rod (17) is provided on the side of the threaded plate (16), and a connecting spring (19) is provided outside the ejector rod (17).

2. A positive pressure explosion-proof motor according to claim 1, Features: The mounting frame (6) is fixedly connected to the outer shell (2), and the mounting frame (6) is sleeved on the outside of the rotating shaft (4). The mounting frame (6) is connected to the fixed side plate (7) by bolts, and the fixed side plate (7) is located on a side of the mounting frame (6) away from the outer shell (2). The mounting frame (6) is fixedly connected to the positioning ring (8), and two ends of the positioning ring (8) are in contact with the outer shell (2) and the fixed side plate (7) respectively.

3. A positive pressure explosion-proof motor according to claim 2, Features: The inner wall of the positioning ring (8) is provided with a slide groove (9), and there are four slide grooves (9) which are symmetrically distributed on the inner wall of the positioning ring (8); the slide groove (9) passes through both ends of the positioning ring (8); the interior of the positioning ring (8) is provided with an annular limiting ring (10), and there are two annular limiting rings (10) which are sequentially distributed inside the side of the positioning ring (8) away from the outer shell (2).

4. A positive pressure explosion-proof motor according to claim 3, Features: A sealing ring (11) is arranged inside the positioning ring (8), and the sealing ring (11) is arranged in a semi-annular shape. The inner wall of the sealing ring (11) is tightly fitted with the outer wall of the rotating shaft (4), and the outer wall of the sealing ring (11) is tightly fitted with the inner wall of the positioning ring (8). There are four sealing rings (11), two in a group, and every two sealing rings (11) are arranged correspondingly to an annular limiting ring (10).

5. A positive pressure explosion-proof motor according to claim 4, Features: The sealing ring (11) is fixedly connected to the protrusion (12), and the protrusion (12) is located in the middle of the outer wall of the sealing ring (11). The sealing ring (11) is fixedly connected to the limiting ear plate (13), and the limiting ear plate (13) is set to be half of the protrusion (12). There are two limiting ear plates (13), which are symmetrically distributed at the two ends of the bottom of the sealing ring (11). The protrusion (12) and the limiting ear plate (13) are correspondingly slidably connected inside the slide groove (9) and the annular limiting ring (10).

6. A positive pressure explosion-proof motor according to claim 5, Features: The sealing ring (11) has an annular groove fixedly connected to one side close to the threaded plate (16), and a clamping block fixedly connected to one side of the sealing ring (11) away from the threaded plate (16), wherein the clamping block facing the side of one sealing ring (11) is inserted into the annular groove on the side of the other sealing ring (11).

7. A positive pressure explosion-proof motor according to claim 1, Features: The blocking plate (15) is in contact with the side surface of the fixed side plate (7); the side of the blocking plate (15) close to the positioning ring (8) is fixedly connected to the threaded plate (16); a threaded ring (20) is provided on the inner wall of the side of the positioning ring (8) close to the blocking plate (15); the threaded plate (16) is connected to the threaded ring (20); the side of the threaded plate (16) away from the blocking plate (15) is fixedly connected to the ejector rod (17); and there are four ejector rods (17) which are evenly distributed on the side surface of the threaded plate (16).

8. A positive pressure explosion-proof motor according to claim 7, Features: One end of the ejector rod (17) away from the threaded plate (16) contacts the side of the sealing ring (11), and a limiting groove (18) is provided on a side of the sealing ring (11) close to the blocking plate (15). The ejector rod (17) is connected to the inside of the limiting groove (18) by bolts. The ejector rod (17) and the connecting spring (19) are sleeved together, and the connecting spring (19) and the ejector rod (17) are arranged correspondingly. Two ends of the connecting spring (19) are respectively in contact with the side of the threaded plate (16) and the side of the sealing ring (11).

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