Electric gate valve for ventilating duct

Abstract

The utility model discloses an electric gate valve for a ventilating duct, which comprises a valve body, the valve body is of a rectangular frame structure enclosed by channel steel, side plates are respectively arranged on two sides of the lower half part of the valve body, and ventilating pipe joints are arranged on the side plates; a valve plate capable of moving up and down is arranged between the two ventilation pipe joints; two pieces of angle steel are transversely and symmetrically arranged in the middle of the valve body, a gap is formed between the two pieces of angle steel, and the valve plate penetrates in and out of the gap. Sealing baffles are symmetrically arranged on the upper surfaces of the two pieces of angle steel, the two sealing baffles are arranged on the two sides of the valve plate respectively, and a sealing piece is arranged between the two sealing baffles. According to the gate valve, paint slag can be prevented from being adhered to the valve plate of the gate valve, and the valve is prevented from being blocked and even stuck.

Description

Technical Field

[0001] The utility model relates to an electric gate valve for a ventilation duct, belonging to the technical field of gate valves. Background Art

[0002] In the spraying industry, the exhaust gas treatment equipment's inlet ventilation duct often contains a lot of sticky substances such as paint mist and paint residue. An electric inlet valve (normally open) is required on the exhaust gas inlet duct entering the exhaust gas treatment equipment. The inlet valve now mostly adopts a butterfly valve or shutter valve structure. In this way, during normal operation, the paint mist and paint residue will adhere to and stick to the valve plate and valve shaft of the inlet valve. Since the valve does not need to be switched on and off for a long time, and the increase in the accumulation of paint mist and paint residue, it will cause the valve to switch on and off, or even get stuck.

[0003] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0004] The utility model aims at the deficiencies in the background technology and provides an electric gate valve for a ventilation duct, which can prevent paint residues from adhering to a valve plate of the gate valve and avoid the valve from getting stuck or even stuck.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An electric gate valve for a ventilation duct comprises a valve body, which is a rectangular frame structure surrounded by channel steel, and side plates are respectively arranged on both sides of the lower half of the valve body, and ventilation pipe joints are arranged on the side plates;

[0007] A valve plate that can move up and down is provided between the two ventilation pipe joints;

[0008] Two angle steels are symmetrically arranged in the middle of the valve body, with a gap between the two angle steels, through which the valve plate passes;

[0009] The upper surfaces of the two angle steels are symmetrically provided with sealing baffles, the two sealing baffles are respectively arranged on both sides of the valve plate, and a sealing member is arranged between the two sealing baffles.

[0010] Furthermore, the sealing element is a graphite packing sealing strip, and the graphite packing sealing strip has 2 layers or 3 layers.

[0011] Furthermore, a sealing member pressing device is provided on the upper side of the sealing member, which can ensure that the gas in the pipeline will not leak from the gap when the valve plate penetrates into the gap or is pulled out of the gap.

[0012] Further, the sealing member pressing device comprises a sealing pressing plate, which comprises two symmetrically arranged right-angle plates, each of which has an end plate fixed at both ends, and the lower ends of the vertical side plates of the right-angle plates are pressed on the upper surface of the sealing member.

[0013] Furthermore, a screw rod is provided on the horizontal side plate of the right-angle plate, the lower end of the screw rod is fixed on the angle steel through a thread, and the upper end of the screw rod locks the right-angle plate through a nut.

[0014] Furthermore, a screw connection seat is fixed in the middle position of the valve body, a bearing seat is installed at the upper end of the valve body, the screw is rotatably installed in the screw connection seat and the bearing seat, and a screw nut is fixed at the upper end of the valve plate, and the screw and the screw nut are rotatably matched.

[0015] Furthermore, a reduction motor is provided at the upper end of the valve body, and the reduction motor drives the lead screw to rotate. An outer spherical bearing is provided in the bearing seat, and a thrust ball bearing is provided in the lead screw connecting seat.

[0016] Furthermore, a travel switch is provided at the upper end and the middle position of the valve body respectively, and a travel limit plate is provided at the upper end of the valve plate.

[0017] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0018] 1. Two ventilation pipe joints are arranged in the lower part of the valve body. When the valve plate is located in the lower part of the valve body, the valve plate plays the role of blocking the pipeline. When the valve plate is located in the upper part of the valve body, the pipelines on both sides of the ventilation pipe joints are connected to realize the opening and closing of the valve.

[0019] 2. Sealing baffles are provided on both sides of the valve plate, and a sealing member is provided between the two sealing baffles. When the valve plate is inserted into the gap or withdrawn from the gap, it can ensure that the gas in the pipeline will not leak from the gap.

[0020] 3. The valve plate is pulled up and down by the lead screw, and the lead screw nut pair is located outside the air duct as a whole, without contact with the medium gas, reducing corrosion. The exhaust gas is introduced into the pipeline. When the system is running, the valve is always open, and the valve plate is basically located outside the ventilation channel. The valve plate does not contact the gas medium, paint mist, paint residue, etc., and there is no adhesion or accumulation of paint mist and paint residue, avoiding the cleaning of paint mist and paint residue.

[0021] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a front view of the utility model;

[0024] Figure 3 yes Figure 2 The enlarged image at point I in the middle;

[0025] Figure 4 It is a partial cross-sectional view of the connection between the lower end of the lead screw and the valve plate in the utility model.

[0026] In the figure,

[0027] 1-valve body, 2-side plate, 3-ventilation pipe joint, 4-valve plate, 5-screw nut, 6-screw, 7-stroke limit plate, 8-stroke switch, 9-reduction motor, 10-angle steel, 11-sealing baffle, 12-graphite packing sealing strip, 13-sealing pressure plate, 14-adjusting screw, 15-bearing seat, 1501-outer spherical bearing, 16-screw connecting seat, 1601-thrust ball bearing. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0029] like Figure 1-Figure 3 As shown, the utility model provides an electric gate valve for ventilation ducts, including a valve body 1, which is a rectangular frame structure surrounded by channel steel, and side plates 2 are respectively provided on both sides of the lower half of the valve body 1, and ventilation pipe joints 3 are provided on the side plates 2. The ventilation pipe joints 3 can be made into a round or square shape to adapt to different working scenes. A valve plate 4 that can move up and down is provided between the two ventilation pipe joints 3. When the valve plate 4 is located in the lower half of the valve body 1, the valve plate 4 plays a role of blocking the pipeline. When the valve plate 4 is located in the upper half of the valve body 1, the pipelines on both sides of the ventilation pipe joints 3 are connected.

[0030] like Figure 4 Two angle steels 10 are symmetrically arranged in the middle of the valve body 1, and a gap is arranged between the two angle steels 10. The valve plate 4 passes through the gap to realize the opening and closing of the valve.

[0031] Sealing baffles 11 are symmetrically arranged on the upper surfaces of the two angle steels 10. The two sealing baffles 11 are disposed on both sides of the valve plate 4. A sealing member is arranged between the two sealing baffles 11. When the valve plate 4 is inserted into or drawn out of the gap, it can be ensured that the gas in the pipeline will not leak from the gap.

[0032] The sealing element is a graphite packing sealing strip 12, and the graphite packing sealing strip 12 has two or three layers.

[0033] A sealing member pressing device is provided on the upper side of the sealing member, and the sealing member pressing device can ensure the overall sealing of the gate valve and prevent gas leakage.

[0034] The sealing member pressing device comprises a sealing pressing plate 13, and the sealing pressing plate 13 comprises two symmetrically arranged right-angle plates, and an end plate is fixed to each end of the two right-angle plates to fix the two right-angle plates together, and the lower end of the vertical side plate of the right-angle plate is pressed on the upper surface of the seal, and the horizontal side plate of the right-angle plate is provided with a screw 14, and the lower end of the screw 14 is fixed to the angle steel 10 through a thread, and the upper end of the screw 14 locks the right-angle plate through a nut, so that the lower end of the vertical side plate of the right-angle plate presses the seal, and the degree of compression of the seal by the right-angle plate is adjusted by adjusting the tightness of the nut.

[0035] A screw connection seat 16 is fixed in the middle position of the valve body 1, a bearing seat 15 is installed on the upper end of the valve body 1, a screw 6 is rotatably installed in the screw connection seat 16 and the bearing seat 15, a screw nut 5 is fixed on the upper end of the valve plate 4, the screw 6 and the screw nut 5 are rotatably matched, the screw 6 rotates, the screw nut 5 moves up and down, thereby driving the valve plate 4 to move up and down, the screw nut pair is located on the outside of the air duct as a whole, does not contact with the medium gas, and reduces corrosion.

[0036] A reduction motor 9 is disposed at the upper end of the valve body 1 , and the reduction motor 9 drives the lead screw 6 to rotate. An outer spherical bearing 1501 is disposed in the bearing seat 15 , and a thrust ball bearing 1601 is disposed in the lead screw connecting seat 16 .

[0037] like Figure 3 A travel switch 8 is respectively provided at the upper end and the middle position of the valve body 1, and a travel limit plate 7 is provided at the upper end of the valve plate 4. When the valve plate 4 moves upward and hits the travel switch 8 at the upper end, the travel switch 8 controls the reduction motor 9 to stop working through an electrical signal. When the valve plate 4 moves downward and hits the middle travel switch 8, the travel switch 8 controls the reduction motor 9 to stop working through an electrical signal.

[0038] The specific working principle of the utility model:

[0039] Two ventilation pipe joints 3 are arranged in the lower half of the valve body 1. When the valve plate 4 is located in the lower half of the valve body 1, the valve plate 4 plays a role of blocking the pipeline. When the valve plate 4 is located in the upper half of the valve body 1, the pipelines on both sides of the ventilation pipe joints 3 are connected to realize the opening and closing of the valve.

[0040] Sealing baffles 11 are provided on both sides of the valve plate 4, and a sealing member is provided between the two sealing baffles 11. When the valve plate 4 is inserted into or pulled out of the gap, it can ensure that the gas in the pipeline will not leak from the gap. The lower end of the vertical side plate of the right angle plate is pressed on the upper surface of the sealing member, and a screw 14 is provided on the horizontal side plate of the right angle plate. The lower end of the screw 14 is fixed to the angle steel 10 through a thread, and the upper end of the screw 14 locks the right angle plate through a nut, so that the lower end of the vertical side plate of the right angle plate presses the sealing member, and the degree of compression of the right angle plate on the pressing sealing member is adjusted by adjusting the tightness of the nut.

[0041] The valve plate 4 is pulled up and down by the lead screw 6, and the lead screw nut pair is located outside the air duct as a whole, and does not contact the medium gas, reducing corrosion. The exhaust gas is introduced into the pipeline. When the system is running, the valve is always open, and the valve plate 4 is basically located outside the ventilation channel. The valve plate 4 does not contact the gas medium, paint mist, paint residue, etc., and there is no adhesion or accumulation of paint mist and paint residue, avoiding the cleaning of paint mist and paint residue.

[0042] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. An electric gate valve for a ventilation duct, characterized in that: The valve body (1) comprises a valve body (1), which is a rectangular frame structure surrounded by channel steel, and side plates (2) are respectively provided on both sides of the lower half of the valve body (1), and ventilation pipe joints (3) are provided on the side plates (2); A valve plate (4) that can move up and down is provided between the two ventilation pipe joints (3); Two angle steels (10) are symmetrically arranged in the middle of the valve body (1), a gap is arranged between the two angle steels (10), and the valve plate (4) passes through the gap. Sealing baffles (11) are symmetrically arranged on the upper surfaces of the two angle steels (10), the two sealing baffles (11) are respectively arranged on both sides of the valve plate (4), and a sealing member is arranged between the two sealing baffles (11).

2. The electric gate valve for ventilation duct according to claim 1, characterized in that: The sealing element is a graphite packing sealing strip (12), and the graphite packing sealing strip (12) has two layers or three layers.

3. The electric gate valve for ventilation duct according to claim 1, characterized in that: A sealing member pressing device is provided on the upper side of the sealing member, which can ensure that the gas in the pipeline will not leak from the gap when the valve plate (4) penetrates into the gap or is withdrawn from the gap.

4. An electric gate valve for a ventilation duct as claimed in claim 3, characterized in that: The sealing member pressing device comprises a sealing pressing plate (13), wherein the sealing pressing plate (13) comprises two symmetrically arranged right-angle plates, each of which has an end plate fixed at both ends, and the lower ends of the vertical side plates of the right-angle plates are pressed against the upper surface of the sealing member.

5. The electric gate valve for ventilation duct according to claim 4, characterized in that: A screw rod (14) is provided on the horizontal side plate of the right angle plate, the lower end of the screw rod (14) is fixed on the angle steel (10) through a thread, and the upper end of the screw rod (14) locks the right angle plate through a nut.

6. The electric gate valve for a ventilation duct according to claim 1, characterized in that: A lead screw connection seat (16) is fixed at the middle position of the valve body (1), a bearing seat (15) is installed at the upper end of the valve body (1), the lead screw (6) is rotatably installed in the lead screw connection seat (16) and the bearing seat (15), and a lead screw nut (5) is fixed at the upper end of the valve plate (4), and the lead screw (6) and the lead screw nut (5) are rotatably matched.

7. An electric gate valve for a ventilation duct as claimed in claim 6, characterized in that: A reduction motor (9) is provided at the upper end of the valve body (1), and the reduction motor (9) drives the lead screw (6) to rotate. An outer spherical bearing (1501) is provided in the bearing seat (15), and a thrust ball bearing (1601) is provided in the lead screw connecting seat (16).

8. The electric gate valve for a ventilation duct as claimed in claim 1, characterized in that: A travel switch (8) is provided at the upper end and the middle position of the valve body (1), and a travel limit plate (7) is provided at the upper end of the valve plate (4).

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