Pneumatic gate valve for sheet recycling system of film production line

Abstract

The invention belongs to the technical field of gate valves, and particularly relates to a pneumatic gate valve for a sheet recycling system of a film production line, which comprises a frame, a material receiving part, a material falling part, an inserting plate and an air cylinder, the frame is a frame shaped like a Chinese character'ri ', a material receiving and falling interval is defined by a front transverse rod, a transverse support and two longitudinal supporting strips, and the material receiving part and the material falling part are respectively fixed above and below the frame; the vertical projections of the discharge port A of the receiving part, the feed port B of the blanking part and the receiving and blanking interval are respectively a projection A, a projection B and a projection C, the projection A falls in the projection C, and the projection C falls in the projection B; the inserting plate is pushed by an air cylinder, and a blade part is arranged at the front end of the inserting plate and matched with a discharging opening A of the material receiving part to cut recycled sheet materials; when the air cylinder is in an extending state, the inserting plate blocks the discharging port A of the material receiving part, and the distance F between the blade part and the front transverse rod is larger than or equal to 20 mm. According to the technical scheme, the technical problem that the plug board cannot be in place due to locking is well solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flap valves, and particularly relates to a pneumatic flap valve for a sheet material recycling system of a film production line. Background Art

[0002] For the production of biaxially oriented films, directly adding crushed sheet materials can reduce costs compared with using recycled pellets, so it is increasingly favored by film manufacturers. Since the sheet materials are directly recycled, the process of granulating the crushed sheet materials is saved, reducing the production cost of the customer's films and making them more competitive in the market. The wastewater treatment and discharge steps generated during granulation are omitted, saving costs for the customer.

[0003] The raw material system of a biaxially oriented film production line includes a loss-in-weight scale quantitative conveying unit, as shown in the attachment Figure 1 from top to bottom, it successively includes a sheet material buffer bin, a flap valve, and a loss-in-weight scale. For the loss-in-weight scale quantitative conveying unit, the flap valve is one of the very important devices. If the action of the flap valve is stuck or not closed in place during production, it will cause abnormal feeding of the loss-in-weight scale, resulting in abnormal pressure in the entire extrusion system and abnormal film thickness. However, when using the flap valves purchased in the existing market, such practical problems are currently faced, restricting the stability and reliability of the sheet material loss-in-weight scale and directly restricting the normal implementation of recycling. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to make up for the deficiencies of the existing technology and provide a pneumatic flap valve for a sheet material recycling system of a film production line.

[0005] To solve the above technical problem, the technical solution of the present invention is as follows: A pneumatic flap valve for a sheet material recycling system of a film production line, comprising a frame, a material receiving member, a material discharging member, a flap, and a cylinder. The frame is a "day"-shaped frame welded by a front cross bar, a rear cross plate, a cross brace, and two longitudinal bars. Longitudinal support bars are welded to the inner sides of the longitudinal bars. The area enclosed by the front cross bar, the cross brace, and the two longitudinal support bars is the material receiving and discharging area. The material receiving member is fixed above the frame, and the material discharging member is fixed below the frame. The vertical projections of the discharge port A of the material receiving member, the feed port B of the material discharging member, and the material receiving and discharging area are projection A, projection B, and projection C respectively. Projection A falls within projection C, and projection C falls within projection B. The flap is horizontally arranged. The rear end of the flap is connected to the piston rod of the cylinder, and the cylinder block is fixedly connected to the rear cross plate. A cutting edge is provided at the front end of the flap. The top surface of the flap fits against the bottom surface of the material receiving member, and the cutting edge matches and cuts the recycled sheet material at the discharge port A of the material receiving member. The bottom surface of the flap is supported on the top surface of the longitudinal support bar. When the piston rod of the cylinder is in the extended state, the plug plate completely blocks the outlet A of the receiving piece, and the distance between the blade and the front crossbar is F, F ≥ 20mm; When the piston rod of the air cylinder is in the retracted state, the plug plate does not block the discharge port A of the material receiving part.

[0006] Furthermore, a notch is provided on each side of the front end of the insert plate, and a pushing surface is formed at the notch. The pushing surface is perpendicular to the top surface and parallel to the blade.

[0007] Furthermore, the inner side of the longitudinal rod is machined to form a guide surface, which is matched with the side clearance of the plug plate to provide guidance for the forward and backward movement of the plug plate; a through hole is provided at the rear end of the plug plate, and the plug plate is hinged to the piston rod of the cylinder through the through hole and the pin shaft.

[0008] Furthermore, the blanking parts include a mounting flange II, a transition horn and a blanking barrel from top to bottom, the mounting flange II is fixedly connected to the frame, the transition horn is a "horn-shaped" upper and lower round, and the blanking barrel is a cylindrical barrel.

[0009] Furthermore, a mounting groove is provided at the top of the cross brace, and the sliding support plate is embedded in the mounting groove; the top screw is screwed to the cross brace, and the top surface of the top screw abuts against the bottom surface of the sliding support plate. The height of the sliding support plate is adjusted by adjusting the top screw so that the top surface of the sliding support plate is flush with the top surface of the longitudinal support bar.

[0010] Furthermore, the sliding support plate is made of polytetrafluoroethylene.

[0011] Furthermore, a reinforcing rib plate is welded between the rear transverse plate and the longitudinal rod.

[0012] Furthermore, the material receiving member includes a material receiving barrel and a mounting flange I, and the mounting flange I is fixedly connected to the frame.

[0013] The beneficial effects that can be achieved by the present invention are: (1) Through reasonable structural setting, when the piston rod of the cylinder is in the extended state, the plug plate completely blocks the outlet A of the material receiving piece, and a large gap F is retained between the blade of the plug plate and the front cross bar; in the process of closing the valve, the blade of the plug plate and the outlet A of the material receiving piece form a "scissors" to cut off the recycled sheet material that is partially exposed to the material receiving piece; the combined use of the gap F and the "scissors" effectively prevents the recycled sheet material that is partially exposed to the material receiving piece from being stuck in the plug plate, and better solves the technical problem that the plug plate cannot be put into place due to being stuck, improves the discharge stability of the sheet material loss-in-weight scale, and thus improves the stability and reliability of the extrusion system of the entire film production line.

[0014] (2) Furthermore, the recycled flakes, particles or debris falling on the top of the longitudinal support bar are pushed to the drop space between the longitudinal support bar and the front cross bar by the pushing surface at the front end of the plug plate, so as to avoid the plug plate being unable to be pushed into place due to the accumulation of materials on the top of the longitudinal support bar.

[0015] (3) Furthermore, by adjusting the top screw, the top surface of the sliding support plate is adjusted to be flush with the top surface of the longitudinal support strip, thereby effectively preventing the plug board from being greatly deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the raw material system of the biaxially stretched film production line in the prior art.

[0017] Figure 2 2 is a perspective view of an embodiment of the present invention.

[0018] Figure 3 is an exploded view of an embodiment of the present invention.

[0019] Figure 4 It is a front view of an embodiment of the present invention.

[0020] Figure 5 2 is a top view of an embodiment of the present invention.

[0021] Figure 6 2 is a three-dimensional diagram of a frame in an embodiment of the present invention.

[0022] Figure 7 2 is a top view of the plugboard in the embodiment of the present invention.

[0023] Figure 8 2 is a front view of the plugboard in the embodiment of the present invention.

[0024] Fig. 9 yes Figure 5 AA section view.

[0025] Fig.10 yes Fig. 9 Magnified view of section B.

[0026] Fig.11 yes Fig. 9 Magnified view of section E.

[0027] Fig.12 yes Figure 5 CC cross-sectional view.

[0028] Fig.13 yes Fig.12 Magnified view of section D.

[0029] Fig.14 1 is a top view of an embodiment of the present invention (with the material receiving parts hidden).

[0030] Fig.15 It is the top view of State 2 of the embodiment of the present invention (the receiving part is hidden).

[0031] In the figure: 1 - frame, 101 - longitudinal rod, 102 - longitudinal support bar, 103 - cross brace, 104 - mounting groove, 105 - rear cross plate, 106 - reinforcing rib plate, 107 - receiving and blanking area, 108 - front cross bar, 109 - guiding surface; 2 - insertion plate, 201 - top surface, 202 - material pushing surface, 203 - cutting edge, 204 - through hole; 3 - receiving part, 301 - receiving cylinder, 302 - mounting flange Ⅰ, 3021 - discharge port A, 4 - blanking part, 401 - blanking cylinder, 402 - transition bellows, 403 - mounting flange Ⅱ, 404 - feed port B, 5 - air cylinder, 6 - pin shaft, 7 - sliding support plate, 8 - setscrew; 97 - sheet material buffer bin, 98 - flap valve, 99 - loss-in-weight feeder. Specific embodiments

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] As Figure 2 shown, a pneumatic flap valve for a sheet material recycling system of a film production line includes a frame 1, a receiving part 3, a blanking part 4, an insertion plate 2 and an air cylinder 5.

[0034] As Figure 6 shown, the frame 1 is a "day"-shaped frame welded by a front cross bar 108, a rear cross plate 105, a cross brace 103 and two longitudinal rods 101. A reinforcing rib plate 106 is welded between the rear cross plate 105 and the longitudinal rods 101. Both the front cross bar 108 and the longitudinal rods 101 are 8# stainless steel channel steels. A longitudinal support bar 102 is welded inside the longitudinal rod 101. There is a relatively large gap between the longitudinal support bar 102 and the front cross bar 108 as the blanking space. The area enclosed by the front cross bar 108, the cross brace 103 and the two longitudinal support bars 102 is the receiving and blanking area 107. A guiding surface 109 is formed by machining inside the longitudinal rod 101. The tops of the two longitudinal support bars 102 are flush after machining. A mounting groove 104 is provided at the top of the cross brace 103. The sliding support plate 7 is fitted into the mounting groove 104; the setscrew 8 is screwed to the cross brace 103, and the top surface of the setscrew 8 abuts against the bottom surface of the sliding support plate 7. The height of the sliding support plate 7 is adjusted by adjusting the setscrew 8 so that the top surface of the sliding support plate 7 is flush with the top surface of the longitudinal support bar 102. The material of the sliding support plate 7 is polytetrafluoroethylene.

[0035] As Figure 3As shown, the material receiving piece 3 includes an integrally welded material receiving barrel 301 and a mounting flange I 302 . The diameter of the material receiving barrel 301 is 300 mm. The material receiving piece 3 is located above the frame 1 , and the mounting flange I 302 is fixedly connected to the frame 1 .

[0036] like Figure 3 As shown, the blanking part 4 includes, from top to bottom, an integrally welded mounting flange II 403, a transition horn 402 and a blanking tube 401. The transition horn 402 is a "horn-shaped" tube with an upper part and a lower circle, and the blanking tube 401 is a cylindrical tube. The blanking part 4 is located below the frame 1, and the mounting flange II 403 is fixedly connected to the frame 1.

[0037] The vertical projection of the discharge port A3021 of the receiving part 3 is projection A, the vertical projection of the feed port B404 of the blanking part 4 is projection B, and the vertical projection of the receiving and blanking interval 107 is projection C. Projection A falls within projection C, and projection C falls within projection B.

[0038] like Figure 7 and Figure 8 As shown, a blade 203 is provided at the front end of the plug board 2; a notch is provided on each side of the front end of the plug board 2, and a pushing surface 202 is formed at the notch. The pushing surface 202 is perpendicular to the top surface 201 and parallel to the blade 203; a through hole 204 is provided at the rear end of the plug board 2.

[0039] like Figure 2 and Fig. 9 As shown, the plugboard 2 is arranged horizontally, and the rear end of the plugboard 2 is hinged to the piston rod of the cylinder 5 through the through hole 204 and the pin 6; the cylinder body of the cylinder 5 is fixedly connected to the rear transverse plate 105. The bottom surface of the plugboard 2 is supported on the longitudinal support strip 102 and the sliding support plate 7; the side surface of the plugboard 2 is in clearance with the guide surface 109 to provide guidance for the forward and backward movement of the plugboard 2; the top surface 201 of the plugboard 2 is in contact with the bottom surface of the material receiving piece 3, and the blade 203 is matched with the material outlet A3021 of the material receiving piece 3 to cut the recycled PET sheet.

[0040] like Fig. 9 and Fig.14 As shown, when the piston rod of the cylinder 5 is in the extended state, the insert plate 2 completely blocks the discharge port A3021 of the receiving member 3, and the distance F between the blade 203 and the front cross bar 108 is 30 mm.

[0041] like Fig.15 As shown, when the piston rod of the cylinder 5 is in the retracted state, the insert plate 2 does not block the discharge port A3021 of the material receiving member 3.

[0042] The use principle of this embodiment: (1) During the process of closing the valve, the blade 203 of the plug plate 2 and the outlet A3021 of the receiving piece 3 form a pair of "scissors" to cut off the PET sheet that is partially exposed from the receiving piece 3 and push it into the gap between the blade 203 and the front cross bar 108, so as to prevent the PET sheet that is partially exposed from the receiving piece 3 from blocking the movement of the plug plate 2.

[0043] (2) The pushing surface 202 at the front end of the insert plate 2 pushes the PET flakes, particles or debris falling on the top of the longitudinal support bar 102 to the falling space between the longitudinal support bar 102 and the front cross bar 108, so as to prevent the PET flakes, particles and debris gathered on the top of the longitudinal support bar 102 from blocking the movement of the insert plate 2.

[0044] (3) After running for a period of time, the staff can adjust the height of the sliding support plate 7 by adjusting the top screw 8, so that the top surface of the sliding support plate 7 is flush with the top surface of the longitudinal support strip 102. Since the sliding support plate 7 is made of polytetrafluoroethylene, this can prevent the insertion plate 2 from being worn and deformed.

[0045] In the description of the present invention, words indicating orientation or positional relationship such as "inside", "outside", "upper", "lower", "front", and "back" are only used to facilitate the description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] The above is only one embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications made without departing from the idea of ​​the present invention are all within the protection scope of the present invention.

Claims

1. A pneumatic gate valve for a film production line sheet recycling system, characterized by: It includes a frame (1), a material receiving part (3), a blanking part (4), an insertion plate (2) and a cylinder (5). The frame (1) is a "day”-shaped frame welded by a front cross bar (108), a rear cross plate (105), a cross brace (103) and two longitudinal bars (101). A longitudinal support bar (102) is welded to the inner side of the longitudinal bar (101). The area enclosed by the front cross bar (108), the cross brace (103) and the two longitudinal support bars (102) is the material receiving and blanking area (107). The material receiving part (3) is fixed above the frame (1), and the blanking part (4) is fixed below the frame (1). The vertical projections of the discharge port A (3021) of the material receiving part (3), the feed port B (404) of the blanking part (4) and the material receiving and blanking area (107) are projection A, projection B and projection C respectively. Projection A falls within projection C, and projection C falls within projection B. The insertion plate (2) is horizontally arranged. The rear end of the insertion plate (2) is connected to the piston rod of the cylinder (5), and the cylinder body of the cylinder (5) is fixedly connected to the rear cross plate (105). A cutting edge (203) is provided at the front end of the insertion plate (2). The top surface (201) of the insertion plate (2) fits against the bottom surface of the material receiving part (3), and the cutting edge (203) matches and cuts the recycled sheet material at the discharge port A (3021) of the material receiving part (3). The bottom surface of the insertion plate (2) is supported on the top surface of the longitudinal support bar (102). When the piston rod of the cylinder (5) is in the extended state, the insertion plate (2) completely blocks the discharge port A (3021) of the material receiving part (3), and the distance between the cutting edge (203) and the front cross bar (108) is F, and F≥20mm. When the piston rod of the cylinder (5) is in the retracted state, the insertion plate (2) does not block the discharge port A (3021) of the material receiving part (3).

2. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: One notch is provided on each side of the front end of the insertion plate (2), and a material pushing surface (202) is formed at the notch. The material pushing surface (202) is perpendicular to the top surface (201) and parallel to the cutting edge (203).

3. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: A guiding surface (109) is formed by machining on the inner side of the longitudinal bar (101). The guiding surface (109) is in clearance fit with the side surface of the insertion plate (2) to provide guidance for the forward and backward movement of the insertion plate (2). A through hole (204) is provided at the rear end of the insertion plate (2), and the insertion plate (2) is hinged to the piston rod of the cylinder (5) through the through hole (204) and a pin shaft (6).

4. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: The blanking part (4) successively includes an installation flange II (403), a transition bellows (402) and a blanking cylinder (401) from top to bottom. The installation flange II (403) is fixedly connected to the frame (1). The transition bellows (402) is in the shape of a "bell” with a round bottom and a square top, and the blanking cylinder (401) is a cylindrical cylinder.

5. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: An installation groove (104) is provided at the top of the cross brace (103). A sliding support plate (7) is embedded in the installation groove (104). A setscrew (8) is screwed to the cross brace (103), and the top surface of the setscrew (8) abuts against the bottom surface of the sliding support plate (7). The height of the sliding support plate (7) is adjusted by adjusting the setscrew (8) so that the top surface of the sliding support plate (7) is flush with the top surface of the longitudinal support bar (102).

6. The pneumatic gate valve for a film production line sheet recycling system according to claim 5 is characterized in that: The material of the sliding support plate (7) is polytetrafluoroethylene.

7. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized by: A reinforcing rib plate (106) is welded between the rear transverse plate (105) and the longitudinal rod (101).

8. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: The material receiving member (3) comprises a material receiving barrel (301) and a mounting flange I (302), and the mounting flange I (302) is fixedly connected to the frame (1).

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