Heavy hammer type galvanized sheet negative pressure fan

Abstract

The heavy hammer type galvanized plate negative pressure fan comprises a machine shell, a rubber shell is connected to the outer wall of the machine shell in a clamped mode, four mounting openings are formed in the rubber shell, a vertical rod is slidably connected into each mounting opening, a threaded hole is formed in each vertical rod, a pull rod is in threaded connection with one side of each threaded hole, and the other side of each threaded hole is in threaded connection with a pull rod. A clamping block is installed at one end of the vertical rod, two springs are installed on one side of the clamping block, the sides, opposite to the clamping block, of the springs are connected to the rubber shell, four clamping bases matched with the clamping block are installed on the machine shell, an air outlet is formed in one side of the machine shell, a handle is installed at the top of the machine shell, and the air outlet is formed in the other side of the machine shell. A chamfering structure is arranged at the corner of the rubber shell, and the angle of the chamfering structure is 60 degrees. The invention relates to the technical field of negative pressure fans, a detachable rubber shell is adopted to cover the outer side of a galvanized fan shell, corrosive substances in air can be effectively isolated, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of negative pressure fans, and in particular to a heavy hammer type negative pressure fan for galvanized plates. Background Art

[0002] Galvanized square negative pressure blowers have different structures and technical parameters. The main models include: 1380*1380*400mm (1.1 kW), 1220*1220*400mm (0.75 kW), 1060*1060*400mm (0.55 kW), and 900*900*400mm (0.37 kW). All galvanized square negative pressure blowers have a speed of 450 rpm, a four-pole, 1400 rpm motor, and IP44 protection level with Class B insulation. Fiberglass trumpet-shaped negative pressure blowers are available in belt-driven and direct-drive versions based on their drive structure. Belt-driven blowers have a speed range of 370-450 rpm and utilize a six-pole or four-pole aluminum motor with IP55 protection level and Class F insulation. The lower-speed version is also quieter. Direct-drive motors primarily come in three types: 12-pole, 440 rpm, 10-pole, 560 rpm, and 8-pole, 720 rpm. 12-pole motors are the most commonly used, and high-speed fans can be noisy. Belt-driven products are the most energy-efficient, economical, and durable. Direct-drive products are suitable for use in locations where belt-driven products are inoperable, such as those exposed to oil or belt corrosion. Fiberglass trumpet-shaped negative pressure fans primarily have 6-, 7-, 3-, and 5-blade blades, and are primarily made of die-cast aluminum alloy, engineering plastics (nylon and fiber), and fiberglass. Blades of varying blade numbers, blade angles, and curvatures must be appropriately matched to the speed and power; a single piece of data cannot accurately describe a fan's exhaust performance.

[0003] However, most negative pressure fans on the current market have the following deficiencies in actual use: poor corrosion resistance: the fan casing mostly adopts a metal structure, which is easily corroded in a high humidity or corrosive gas environment for a long time, resulting in a shortened equipment life; the louvers are fragile and unstable in operation: the louver structure of the fan air inlet is mostly made of lightweight materials, and the opening and closing depends on electronic control or spring mechanisms, which are prone to failure and have high maintenance costs; the installation and fixation are complicated and the structural protection is poor: the traditional fan fixing structure is relatively cumbersome, lacks a quick connection and disassembly mechanism, and does not effectively protect the casing, which increases the difficulty of subsequent maintenance. For this reason, we propose a heavy hammer galvanized sheet negative pressure fan to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a heavy hammer type galvanized sheet negative pressure fan.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is provided with a plurality of holes, each of which is connected to the inner wall of the cam, and a pull rod is screwed on one side of the cam, and a clamping block is installed on one end of the cam, and two springs are installed on one side of the clamping block. The spring is installed on the rubber shell on the side opposite to the clamping block. Four clamping seats adapted for the clamping block are installed on the cam. One side of the cam is provided with an air outlet, and the other side of the cam is provided with a negative pressure fan. A handle is installed on the top of the cam. The negative pressure fan is driven by a driving motor and a V-belt. A louver is installed on the outer side of the negative pressure fan, and a weight is located on one side of the air inlet of the negative pressure fan. The louver consists of a plurality of blades, each blade is connected to a weight connecting rod mechanism by a rotating shaft, and the weight is installed on the movable end connected to the weight connecting rod mechanism for assisting in opening and closing the louver blades.

[0007] Preferably, the exterior of the rubber housing is a chamfered structure, and the angle thereof is 60°.

[0008] Preferably, the vertical rod is made of stainless steel and has a diameter of 2 cm.

[0009] Preferably, a guide rod is installed in the installation opening, and a guide hole adapted to the guide rod is opened in the clamping block.

[0010] Preferably, one side of the pull rod is connected to a rod cap, and the rod cap is located on one side of the threaded hole.

[0011] Preferably, the casing is made of galvanized steel plate with a zinc layer thickness of 60-100 μm, and the rubber shell is made of high-temperature resistant silicone rubber material with a temperature resistance range of -40°C to 200°C to enhance the equipment's corrosion resistance and ability to adapt to high-temperature environments.

[0012] Preferably, a detachable filter is installed in the air outlet. The filter is made of 304 stainless steel and has a mesh diameter of 0.5-2mm. It is used to prevent dust and debris from entering the fan and extend the service life of the equipment.

[0013] Preferably, a detachable inspection cover is provided on the top of the casing, and the inspection cover is fixed by bolts. Sound insulation cotton with a thickness of 3-8 mm is added inside the rubber shell to reduce the noise level of the fan when it is running to below 60dB.

[0014] Preferably, the rod cap is a hexagonal structure with a diameter of 2.5-3.5 cm and a surface with an anti-slip texture. The inner wall of the card seat is provided with a wear-resistant ceramic coating with a coating thickness of 0.1-0.3 mm to improve the durability of the card structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This heavy hammer type galvanized sheet metal negative pressure blower adopts a detachable rubber shell covering the outside of the galvanized blower housing, which can effectively isolate corrosive substances in the air and extend the service life of the equipment; Enhanced structural safety: The rubber shell adopts a 60° chamfer design to reduce the safety hazards caused by sharp corner collisions during use;

[0017] 2. The heavy hammer type galvanized sheet negative pressure fan has more stable and reliable shutter opening and closing: the shutter blades are driven by the heavy hammer connecting rod structure to realize self-weight opening and closing, avoiding jamming or failure caused by spring fatigue or electric actuator failure; easy assembly and disassembly, convenient maintenance: the block + guide rod structure and the threaded screw-out pull rod combination can realize the rapid assembly and disassembly of the rubber shell, improving the efficiency of after-sales maintenance; high-strength connection structure: the vertical rod is made of 2cm diameter stainless steel, which effectively improves the rigidity and corrosion resistance of the whole machine and ensures long-term operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic cross-sectional view of a heavy hammer type negative pressure fan for galvanized sheet metal proposed by the present invention;

[0019] Figure 2 This is a structural schematic diagram of a heavy hammer type galvanized sheet negative pressure fan proposed by the present invention;

[0020] Figure 3 This is an enlarged structural diagram of location A of a heavy hammer type negative pressure fan for galvanized sheet metal proposed by the present invention.

[0021] Figure 4 This is a structural diagram of the present invention when the card block is not in a connected state.

[0022] Figure 5 It is a structural schematic diagram of the card block of the present invention in the connected state.

[0023] Figure 6 It is a schematic diagram of the explosion structure of the negative pressure fan of the present invention.

[0024] Figure 7 It is a schematic diagram of the overall structure of the negative pressure fan of the present invention.

[0025] In the figure: 1. Negative pressure fan; 2. Casing; 3. Rubber shell; 4. Handle; 5. Air outlet; 6. Holder; 7. Pull rod; 8. Rod cap; 9. Threaded hole; 10. Block; 11. Spring; 12. Guide rod; 13. Vertical rod; 14. Weight; 15. Shutter; 16. Weight connecting rod mechanism; 17. Drive motor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] Reference Figure 1-7 , a heavy hammer type galvanized sheet negative pressure fan, including a casing 2, the outer wall of the casing 2 is clamped with a rubber shell 3, the outside of the rubber shell 3 is a chamfered structure, and its angle is 60°, this setting prevents users from being injured during use, reducing safety hazards, four mounting holes are opened inside the rubber shell 3, a guide rod 12 is installed in the mounting hole, and a guide hole adapted to the guide rod 12 is opened in the block 10, this setting limits the movement of the block 10 so that it can only move on the guide rod 12. A vertical rod 13 is slidably connected in each mounting hole, and the negative pressure fan 1 is driven by a drive motor 17 and a V-belt. A louver 15 is installed on the outside of the negative pressure fan 1, and a heavy hammer 14 is located on the air inlet side of the negative pressure fan 1. The louver 15 is composed of several blades, each blade is connected to the heavy hammer connecting rod mechanism 16 through a rotating shaft, and the heavy hammer 14 is installed on the heavy hammer connecting rod mechanism 16 is connected to the movable end, which is used to assist in opening and closing the blades of the shutter 15. The vertical rod 13 is made of stainless steel and has a diameter of 2 cm. This arrangement increases the service life of the equipment. A threaded hole 9 is provided inside the vertical rod 13, and a pull rod 7 is threadedly connected to one side of the threaded hole 9. A rod cap 8 is connected to one side of the pull rod 7. The rod cap 8 is located on one side of the threaded hole 9. This arrangement allows the rubber housing 3 to retract the pull rod 7 into the threaded hole 9 through the rod cap 8 after installation, thereby avoiding damage to the pull rod 7 caused by the negative pressure fan during use. A block 10 is installed at one end of the vertical rod 13, and two springs 11 are installed on one side of the block 10. The side of the spring 11 opposite to the block 10 is installed on the rubber housing 3. Four holders 6 compatible with the block 10 are installed on the casing 2. An air outlet 5 is provided on one side of the casing 2, and a negative pressure fan 1 is installed on the other side of the casing 2.

[0029] The casing 2 is made of galvanized steel plate with a zinc layer thickness of 60-100 μm. The rubber shell 3 is made of high-temperature resistant silicone rubber material with a temperature resistance range of -40°C to 200°C to enhance the equipment's corrosion resistance and ability to adapt to high-temperature environments.

[0030] A detachable filter is installed in the air outlet 5. The filter is made of 304 stainless steel and has a mesh diameter of 0.5-2mm. It is used to prevent dust and debris from entering the fan and extend the service life of the equipment.

[0031] A detachable inspection cover is provided on the top of the casing 2 and fixed by bolts. Sound insulation cotton with a thickness of 3-8 mm is added inside the rubber shell 3 to reduce the noise level of the fan to below 60dB when it is running.

[0032] The rod cap 8 is a hexagonal structure with a diameter of 2.5-3.5 cm and a non-slip texture on the surface. The inner wall of the clamping seat 6 is provided with a wear-resistant ceramic coating with a thickness of 0.1-0.3 mm to improve the durability of the clamping structure.

[0033] In the present invention, the weight hammer type galvanized sheet metal negative pressure fan of the present invention mainly includes three parts: a fan body, a rubber shell and a weight hammer louver structure.

[0034] During the installation process, the user rotates the rod cap 8, pushing the pull rod 7 out of the threaded hole 9 in the vertical rod 13, driving the vertical rod 13 and the connected block 10 to move outward. Under the pressure of the spring 11, the block 10 is finally inserted into the preset seat 6 on the casing 2, thereby firmly installing the rubber shell 3 on the outside of the fan casing.

[0035] like Figure 6-7 As shown, when the equipment is operating, the negative pressure fan 1 is driven by a drive motor 17 and a V-belt. A louver 15 consisting of multiple blades is provided on the air inlet side. Each blade is connected to a weight connecting rod 16 via a rotating shaft. As the negative pressure fan 1 rotates, a pressure difference is formed in the incoming air, and the weight of the weight 14 automatically opens the louver 15. After the equipment stops, the blades naturally close under the action of the weight 14, effectively preventing foreign matter from entering.

[0036] The guide rod 12 cooperates with the block 10 to limit its movement path, preventing the block 10 from lateral displacement during installation, thereby ensuring that the rubber housing is firmly installed and evenly stressed.

[0037] When the device is in use, the four rod caps 8 are rotated in sequence to unscrew the pull rod 7 from the threaded hole 9, and then the vertical rod 13 and the clamping block 10 are driven to move by pulling the rod cap 8. The clamping block 10 moves to squeeze the spring 11, so that the clamping block 10 is clamped on the clamping seat 6, and then the installation is completed. At this point, a layer of rubber shell is clamped on the negative pressure fan housing, realizing anti-corrosion protection for the negative pressure fan;

[0038] like Figure 4 The block is shown as a schematic structural diagram when it is not in a connected state; when the block 10 and the holder 6 are not in a connected state, the block 10 and the guide rod 12 are in a separated state;

[0039] At this time, the spring 11 is in an extended state. The extended state of the spring 11 is mainly achieved by unscrewing the pull rod 7 from the threaded hole 9, and then pulling the rod cap 8 to drive the vertical rod 13 and the block 10 to move; it should be noted that the threaded hole 9, the block 10, and the vertical rod 13 are integrated. When the rod cap 8 is manually pulled, the threaded hole 9, the block 10, the vertical rod 13 and the block 10 move to the left as a whole, and the spring 11 is the necessary basis for realizing the overall movement of the threaded hole 9, the block 10, the vertical rod 13 and the block 10. The overall reset and extension can be achieved by the spring.

[0040] like Figure 5 The figure shows the structure of the card block in the connected state; the card block 10 is just engaged with the card holder 6;

[0041] It should be noted that the guide rod 12 does not affect the movement of the block 10. The block 10 is a concave structure in the middle of the right surface, which is exactly adapted to the guide rod 12. When in use, the four rod caps 8 are rotated in sequence to unscrew the pull rod 7 from the threaded hole 9, and then the vertical rod 13 and the block 10 are driven to move by pulling the rod cap 8. The movement of the block 10 squeezes the spring 11, so that the block 10 is clamped on the base 6. The guide rod 12 in this application only has a limiting effect on the block 10 and the base 6 when they are in the engaged connection state, preventing the block 10 from shifting left and right, but has no effect on the left and right movement of the block 10.

[0042] Example 1

[0043] In a specific embodiment, the casing 2 of the heavy hammer type galvanized sheet negative pressure blower is made of galvanized steel sheet with a thickness of 1.5 mm, and the surface is hot-dip galvanized with a zinc layer thickness of 80 μm to further enhance the corrosion resistance of the casing 2. The rubber shell 3 is made of high-temperature resistant silicone rubber material with a temperature resistance range of -40°C to 200°C, ensuring that it can still maintain good elasticity and protection performance in high temperature environments. In addition, the blower 1 adopts a high-efficiency brushless DC motor with a power of 750W and an adjustable speed range of 800-2000rpm to meet the ventilation requirements under different working conditions. The guide rod 12 is made of stainless steel with a diameter of 1 cm, and the surface is polished to reduce friction resistance, ensuring that the block 10 slides more smoothly on the guide rod 12. In actual use, by adjusting the number of rotations of the pull rod 7, the clamping force between the block 10 and the base 6 can be accurately controlled to adapt to the installation requirements under different environments.

[0044] Example 2

[0045] In another specific embodiment, the chamfer angle of the rubber shell 3 is adjusted to 45° to further reduce the risk of edge collisions, and is suitable for use in narrow spaces or areas with high personnel flow. The length of the vertical rod 13 is increased to 15 cm to accommodate a larger size of the casing 2. The thread specification of the threaded hole 9 is M8, and the precision processing of the pull rod 7 ensures the feel and stability during rotation. The spring 11 is made of a high-elasticity stainless steel spring with a spring constant of 20 N / mm, which can maintain a stable reset force during frequent operations. In addition, a detachable filter is added to the air outlet 5. The filter is made of 304 stainless steel with a mesh diameter of 1 mm, which effectively prevents dust and debris from entering the inside of the fan and extends the service life of the equipment. During the installation process, the operator can quickly locate the relative position of the casing 2 and the rubber shell 3 through the handle 4 to improve installation efficiency.

[0046] Example 3

[0047] In another specific embodiment, a detachable inspection cover is added to the top of the casing 2 of the heavy hammer type galvanized sheet metal negative pressure blower, and the inspection cover is fixed by bolts to facilitate the maintenance of the blower 1 and the internal circuit. A layer of sound insulation cotton is added to the inside of the rubber shell 3 with a thickness of 5mm, which effectively reduces the noise during the operation of the blower. The noise level is controlled below 60dB, which is suitable for industrial environments that are sensitive to noise. The rod cap 8 of the pull rod 7 adopts an ergonomically designed hexagonal structure with a diameter of 3cm and an anti-slip texture engraved on the surface to facilitate the operator to rotate it forcefully. A wear-resistant ceramic coating is added to the inner wall of the holder 6 with a thickness of 0.2mm to reduce the wear between the block 10 and the holder 6 during long-term use. In practical applications, this embodiment is particularly suitable for environments with a lot of corrosive gases such as chemical plants. The dual protection of the rubber shell 3 and the galvanized casing 2 can significantly extend the service life of the equipment.

[0048] Example 4

[0049] A heavy hammer type galvanized sheet negative pressure fan used in chemical plants. The fan housing is covered with a 5mm thick fluororubber shell. It has excellent acid and alkali resistance and is suitable for environments with highly corrosive gases such as concentrated sulfuric acid and hydrofluoric acid.

[0050] Example 5

[0051] A heavy hammer type negative pressure fan for high temperature workshops. It adopts high temperature resistant rubber coated shell and galvanized sheet metal with aluminum foil reflective layer inside the shell, which effectively improves the overall heat dissipation efficiency and is suitable for ventilation and cooling of metal heat treatment workshops.

[0052] Example 6

[0053] A heavy hammer blower for use in farm ventilation systems. The louver blades are made of ammonia-resistant PVC, and the heavy hammer is coated with high-density lead rubber. It can still open and close stably in low wind pressure environments, effectively improving ventilation efficiency and the health of poultry and livestock.

[0054] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A heavy hammer type galvanized sheet negative pressure fan, comprising a housing (2), characterized in that: The outer wall of the housing (2) is clamped with a rubber housing (3), and the interior of the rubber housing (3) is provided with four installation openings, and a vertical rod (13) is slidably connected in each installation opening, and a threaded hole (9) is provided in the interior of the vertical rod (13), and a pull rod (7) is threadedly connected to one side of the threaded hole (9), and a clamping block (10) is installed at one end of the vertical rod (13), and two springs (11) are installed on one side of the clamping block (10), and the side of the spring (11) opposite to the clamping block (10) is installed on the rubber housing (3), and four clamping seats (6) adapted to the clamping block (10) are installed on the housing (2). An air outlet (5) is provided on one side of the housing (2), a negative pressure fan (1) is installed on the other side of the housing (2), a handle (4) is installed on the top of the housing (2), the negative pressure fan (1) is driven by a drive motor (17) and a V-belt, a louver (15) is installed on the outside of the negative pressure fan (1), a weight (14) is located on the air inlet side of the negative pressure fan (1), the louver (15) is composed of a plurality of blades, each blade is connected to a weight connecting rod mechanism (16) through a rotating shaft, and the weight (14) is installed on the movable end connected to the weight connecting rod mechanism (16) to assist in opening and closing the blades of the louver (15).

2. A heavy hammer type galvanized sheet negative pressure fan according to claim 1, characterized in that: The corners of the rubber housing (3) are provided with chamfered structures, and the angle thereof is 60°.

3. A heavy hammer type galvanized sheet negative pressure blower according to claim 1, characterized in that: The material of the vertical rod (13) is stainless steel, and its diameter is 2 cm.

4. A heavy hammer type galvanized sheet metal negative pressure blower according to claim 1, characterized in that: A guide rod (12) is installed in the installation opening, and a guide hole adapted to the guide rod (12) is provided in the clamping block (10).

5. A heavy hammer type galvanized sheet negative pressure blower according to claim 1, characterized in that: A rod cap (8) is connected to the side of the pull rod (7) away from the threaded hole (9).

6. A heavy hammer type galvanized sheet metal negative pressure blower according to claim 1, characterized in that: The housing (2) is made of galvanized steel sheet with a zinc layer thickness of 60-100 μm. The rubber housing (3) is made of high-temperature resistant silicone rubber material with a temperature resistance range of -40°C to 200°C, so as to enhance the equipment's corrosion resistance and ability to adapt to high-temperature environments.

7. The heavy hammer type galvanized sheet metal negative pressure blower according to claim 1, characterized in that: A detachable filter is installed in the air outlet (5). The filter is made of 304 stainless steel and has a mesh diameter of 0.5-2 mm. It is used to prevent dust and debris from entering the fan and extend the service life of the equipment.

8. The heavy hammer type galvanized sheet metal negative pressure blower according to claim 1, characterized in that: A detachable inspection cover is provided on the top of the casing (2), and the inspection cover is fixed by bolts. Sound insulation cotton with a thickness of 3-8 mm is added inside the rubber shell (3) to reduce the noise level of the fan to below 60 dB when it is running.

9. The heavy hammer type galvanized sheet metal negative pressure blower according to claim 1, characterized in that: The rod cap (8) is a hexagonal structure with a diameter of 2.5-3.5 cm and a surface with an anti-slip texture. The inner wall of the clamping seat (6) is provided with a wear-resistant ceramic coating with a thickness of 0.1-0.3 mm to improve the durability of the clamping structure.

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