Pneumatic gate valve for film production line flake recycling system

Abstract

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, which includes a frame, a material receiving member, a blanking member, a flap and a cylinder. The frame is a "day"-shaped frame, and the front cross bar, the cross brace and two longitudinal support bars enclose a material receiving and blanking area. The material receiving member and the blanking member are respectively fixed above and below the frame. The vertical projections of the discharge port A of the material receiving member, the feed port B of the blanking member and the material receiving and blanking area are respectively projection A, projection B and projection C. Projection A falls within projection C, and projection C falls within projection B. The flap is pushed by the cylinder, and a blade portion is provided at the front end. The blade portion matches and cuts the recycled sheet material with the discharge port A of the material receiving member. When the cylinder is in the extended state, the flap blocks the discharge port A of the material receiving member, and the distance between the blade portion and the front cross bar is F, and F≥20mm. This technical solution preferably solves the technical problem that the flap cannot reach the position due to jamming.

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 the crushed sheet materials compared with using recycled pellets can reduce costs, so it is increasingly favored by film manufacturers. Because the direct recycling of sheet materials saves the process of granulating the crushed sheet materials, reduces the production cost of the customer's films, and makes them more competitive in the market. It also eliminates the wastewater treatment and discharge steps generated during granulation, 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 appendix Figure 1 shown, which successively includes a sheet material buffer bin, a flap valve, and a loss-in-weight scale from top to bottom. 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:

[0006] A pneumatic flap valve for a sheet material recycling system of a film production line, comprising a frame, a material receiving member, a material dropping member, a flap, and a cylinder,

[0007] 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 inside 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 dropping area;

[0008] The material receiving member is fixed above the frame, and the material dropping 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 dropping member, and the material receiving and dropping area are projection A, projection B, and projection C respectively. Projection A falls within projection C, and projection C falls within projection B;

[0009] The insert plate is arranged horizontally, the rear end of the insert plate is connected to the piston rod of the cylinder, and the cylinder body of the cylinder is fixedly connected to the rear horizontal plate; a blade is arranged at the front end of the insert plate, the top surface of the insert plate is in contact with the bottom surface of the material receiving piece, and the blade matches the material outlet A of the material receiving piece to cut the recycled sheet material; the bottom surface of the insert plate is supported on the top surface of the longitudinal support strip;

[0010] 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;

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] Furthermore, the sliding support plate is made of polytetrafluoroethylene.

[0017] Furthermore, a reinforcing rib plate is welded between the rear transverse plate and the longitudinal rod.

[0018] 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.

[0019] The beneficial effects that can be achieved by the present invention are:

[0020] (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.

[0021] (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.

[0022] (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

[0023] Figure 1 It is a schematic diagram of the raw material system of the biaxially stretched film production line in the prior art.

[0024] Figure 2 It is a stereogram of an embodiment of the present invention.

[0025] Figure 3 is an exploded view of an embodiment of the present invention.

[0026] Figure 4 It is a front view of an embodiment of the present invention.

[0027] Figure 5 2 is a top view of an embodiment of the present invention.

[0028] Figure 6 2 is a three-dimensional diagram of a frame in an embodiment of the present invention.

[0029] Figure 7 2 is a top view of the plugboard in the embodiment of the present invention.

[0030] Figure 8 2 is a front view of the plugboard in the embodiment of the present invention.

[0031] Fig. 9 yes Figure 5 AA section view.

[0032] Fig.10 yes Fig. 9 Magnified view of section B.

[0033] Fig.11 yes Fig. 9 Magnified view of section E.

[0034] Fig.12 yes Figure 5 CC cross-sectional view.

[0035] Fig.13 yes Fig.12 Magnified view of section D.

[0036] Fig.14 1 is a top view of an embodiment of the present invention (with the material receiving parts hidden).

[0037] Fig.15 1 is a top view of state 2 of an embodiment of the present invention (the material connection parts are hidden).

[0038] In the figure: 1-frame, 101-longitudinal rod, 102-longitudinal support bar, 103-cross brace, 104-installation groove, 105-rear cross plate, 106-reinforcement rib plate, 107-receiving blanking section, 108-front cross bar, 109-guide surface;

[0039] 2-insert plate, 201-top surface, 202-pushing surface, 203-blade portion, 204-through hole;

[0040] 3- material receiving part, 301- material receiving barrel, 302- mounting flange Ⅰ, 3021- material outlet A,

[0041] 4- blanking parts, 401- blanking tube, 402- transition horn, 403- mounting flange Ⅱ, 404- feed port B,

[0042] 5-cylinder, 6-pin shaft, 7-sliding support plate, 8-top screw;

[0043] 97-sheet material buffer bin, 98-gate valve, 99-loss-in-weight scale. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] like Figure 2 As shown, a pneumatic gate valve for a sheet recycling system of a film production line includes a frame 1, a material receiving part 3, a material blanking part 4, a gate 2 and a cylinder 5.

[0046] like Figure 6As shown in the figure, 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 reinforcing rib plate 106 is welded between the rear cross - plate 105 and the longitudinal bar 101. Both the front cross - bar 108 and the longitudinal bar 101 are 8# stainless steel channel steels. A longitudinal support bar 102 is welded to the inner side of the longitudinal bar 101. There is a relatively large gap between the longitudinal support bar 102 and the front cross - bar 108 as a blanking space. The area enclosed by the front cross - bar 108, the cross - brace 103 and the two longitudinal support bars 102 is the blanking and receiving area 107. A guiding surface 109 is formed by machining on the inner side of the longitudinal bar 101. The tops of the two longitudinal support bars 102 are flush after machining. An installation groove 104 is provided at the top of the cross - brace 103. The sliding support plate 7 is fitted into the installation 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.

[0047] As Figure 3 shown, the receiving part 3 includes a receiving cylinder 301 and a mounting flange Ⅰ302 which are integrally welded. The diameter of the receiving cylinder 301 is 300 mm. The receiving part 3 is located above the frame 1, and the mounting flange Ⅰ302 is fixedly connected to the frame 1.

[0048] As Figure 3 shown, the blanking part 4 successively includes a mounting flange Ⅱ403, a transition bell - mouth 402 and a blanking cylinder 401 which are integrally welded from top to bottom. The transition bell - mouth 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. The blanking part 4 is located below the frame 1, and the mounting flange Ⅱ403 is fixedly connected to the frame 1.

[0049] 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 blanking and receiving area 107 is projection C. Projection A falls within projection C, and projection C falls within projection B.

[0050] As Figure 7 and Figure 8 shown, the front end of the insertion plate 2 is provided with a cutting edge 203. One notch is provided on each side of the front end of the insertion plate 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 cutting edge 203. A through - hole 204 is provided at the rear end of the insertion plate 2.

[0051] As Figure 2 and Fig. 9As 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.

[0052] 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.

[0053] 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.

[0054] The use principle of this embodiment:

[0055] (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.

[0056] (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.

[0057] (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.

[0058] 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.

[0059] 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), a plug board (2), and a cylinder (5). The frame (1) is a "day"-shaped frame formed by welding a front cross bar (108), a rear cross plate (105), a cross brace (103), and two longitudinal bars (101). A longitudinal support strip (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 strips (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 plug board (2) is horizontally arranged. The rear end of the plug board (2) is connected to the piston rod of the cylinder (5), and the cylinder block 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 plug board (2). The top surface (201) of the plug board (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 plug board (2) is supported on the top surface of the longitudinal support strip (102). When the piston rod of the cylinder (5) is in the extended state, the plug board (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, where F ≥ 20 mm. When the piston rod of the cylinder (5) is in the retracted state, the plug board (2) does not block the discharge port A (3021) of the material receiving part (3). One 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 cutting edge (203). There is a gap between the longitudinal support strip (102) and the front cross bar (108) as the blanking space. An installation groove (104) is provided at the top of the cross brace (103). The sliding support plate (7) is fitted into the installation 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 strip (102). The material of the sliding support plate (7) is polytetrafluoroethylene.

2. 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) has a clearance fit with the side surface of the plug board (2) and is used to guide the forward and backward movement of the plug board (2). A through hole (204) is provided at the rear end of the plug board (2), and the plug board (2) is hinged to the piston rod of the cylinder (5) through the through hole (204) and a pin shaft (6).

3. The pneumatic gate valve for a film production line sheet recycling system according to claim 1 is characterized in that: The blanking part (4) comprises, from top to bottom, a mounting flange II (403), a transition horn (402) and a blanking barrel (401); the mounting flange II (403) is fixedly connected to the frame (1); the transition horn (402) is in the shape of a "horn" with an upper part and a lower circle; and the blanking barrel (401) is a cylindrical barrel.

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

5. 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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