An environmentally friendly wood processing and painting equipment

Abstract

The present invention discloses an environmentally friendly wood processing and painting equipment, and the present invention relates to the technical field of painting equipment. The environmentally friendly wood processing and painting equipment, through the cooperation of an annular driving frame and a liquid guide ring frame, can drive a plurality of liquid guide rods to reciprocate inside the machine body when spraying the wood body, as the annular driving frame and the liquid guide ring frame run, so that the liquid guide end can run along the wood surface, realize the reciprocating spraying operation on the wood surface, and in the process of spraying, the distance between the atomizing nozzle and the wood body surface can be kept constant, so that the paint can be evenly sprayed on the surface of the wood body, and the equipment can be suitable for spraying wood bodies of different sizes and shapes, which is more convenient than the traditional spraying method, and effectively improves the spraying uniformity and application range of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of paint spraying equipment, in particular to an environmentally friendly wood processing paint spraying equipment. Background Art

[0002] Spraying is a coating method that uses a spray gun or a disc atomizer to disperse into uniform and fine droplets with the help of pressure or centrifugal force, and then applies them to the surface of the object to be coated. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivative methods of the above basic spraying forms, such as large-flow low-pressure atomization spraying, thermal spraying, automatic spraying, multi-group spraying, etc.; refer to the Chinese patent, application number: "CN218108161U" "An environmentally friendly wood processing spraying equipment", the patent points out that the existing spraying equipment cannot achieve uniform automatic spraying on the surface of the clamping and fixing side of the wood, thereby reducing production efficiency, but the above equipment still has the problems of poor spraying uniformity and a small scope of application. In this regard, we propose an environmentally friendly wood processing spraying equipment to solve the above problems. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides an environmentally friendly wood processing and painting equipment, which solves the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an environmentally friendly wood processing and painting equipment, including a body, inside which a feeding belt and a discharging belt are respectively installed for conveying the wood body.

[0005] An annular driving frame is rotatably connected inside the machine body, a liquid guide ring frame is fixed outside the annular driving frame, and the installation position of the annular driving frame is located between the conveyor belt and the discharge belt. The annular driving frame is used to drive the outer liquid guide ring frame to reciprocate inside the machine body;

[0006] A plurality of liquid-conducting rods are rotatably connected to the outside of the liquid-conducting ring frame, and a corrugated end tube is fixed between the end of the liquid-conducting rod and the liquid-conducting ring frame, an annular cover is fixed to the outside of the annular driving frame, and a plurality of hydraulic cylinders are rotatably connected inside the annular cover, which are used to drive the liquid-conducting rod to operate, and adjust the angle according to the wood bodies of different sizes and shapes. The end of the liquid-conducting rod away from the corrugated end tube is rotatably connected to the liquid-conducting end head, and a counterweight block is fixedly installed at the center position of the outside of the liquid-conducting end head, and a plurality of atomizing nozzles are installed on the side of the liquid-conducting end head close to the wood body;

[0007] A limiting ball is fixed at one end of the liquid guiding rod away from the corrugated end tube, a limiting ring sleeve is fixed on the outside of the liquid guiding end, and the limiting ball is rotatably installed inside the limiting ring sleeve, so that the atomizing nozzle outside the liquid guiding end can maintain translation through the cooperation of the counterweight block, and a positioning bolt is provided inside the limiting ring sleeve for locking the limiting ball.

[0008] Preferably, a driving assembly is provided inside the machine body for driving the annular driving frame to operate inside the machine body, and the driving assembly includes a driving motor, which is fixed inside the machine body, and a driving gear is fixedly sleeved on the output end of the driving motor, and a transmission gear plate is fixedly installed on the outer side of the annular driving frame, and the driving gear and the transmission gear plate are meshed with each other.

[0009] Preferably, the end of the hydraulic cylinder is rotatably connected to a limiting frame, the limiting frame is fixedly installed on the inner side of the annular cover, and the piston end of the hydraulic cylinder is rotatably connected to the corresponding fluid guiding rod.

[0010] Preferably, a plurality of limit plates are fixedly mounted on the outer side of the liquid guiding ring frame, the end of the liquid guiding rod is rotatably connected to a rotating shaft, the rotating shaft is rotatably mounted inside the limit plate, and an elastic sealing cover is connected between the limit ring sleeve and the liquid guiding rod.

[0011] Preferably, right-angle positioning frames are fixedly installed on both sides of the body, a limiting groove is opened inside the annular driving frame, a limiting slider is installed on the outer side of the right-angle positioning frame, and the limiting slider is slidably connected inside the limiting groove.

[0012] Preferably, a control panel is installed on the outside of the machine body, and a drying rack is fixed inside the machine body for drying the wood body after spraying, and fixing rods are fixedly connected between the two sides of the drying rack and the inner wall of the machine body.

[0013] Preferably, a storage box is fixedly mounted on the top surface of the machine body, a pump connected to the storage box is mounted at the end of the storage box, and a hose is connected between the liquid outlet of the pump and the liquid guide ring frame for transporting the prepared paint.

[0014] Preferably, the conveyor belts have two and a cleaning assembly is provided between the two conveyor belts for cleaning the surface of the wood body, the cleaning assembly includes a negative pressure cleaning frame, the negative pressure cleaning frame is fixedly installed inside the machine body, and the installation position of the negative pressure cleaning frame is located between the two conveyor belts, a plurality of elastic cleaning sheets are fixedly installed on the inner side of the negative pressure cleaning frame, a negative pressure device is fixedly installed on the outside of the machine body, and the negative pressure device and the negative pressure cleaning frame are connected to each other.

[0015] Preferably, a plurality of extraction holes are provided on the inner side of the negative pressure cleaning frame for collecting and processing dust when the elastic cleaning sheet cleans the surface of the wood body.

[0016] Preferably, a rectangular negative pressure frame is fixedly installed inside the machine body, and the rectangular negative pressure frame is communicated with the negative pressure device.

[0017] The present invention provides an environmentally friendly wood processing and painting equipment. Compared with the prior art, it has the following beneficial effects:

[0018] (1) The environmentally friendly wood processing and painting equipment, through the cooperation of the annular driving frame and the liquid guiding ring frame, can drive multiple liquid guiding rods to reciprocate inside the machine body when spraying the wood body. The liquid guiding end can run along the wood surface to achieve reciprocating spraying on the wood surface. In the process of spraying, the distance between the atomizing nozzle and the surface of the wood body can be kept constant, so that the paint can be evenly sprayed on the surface of the wood body. The equipment can be applied to wood bodies of different sizes and shapes to achieve spraying operations. Compared with traditional spraying methods, it is more convenient and effectively improves the spraying uniformity and application range of the equipment.

[0019] (2) The environmentally friendly wood processing and painting equipment can clean the surface of the wood body before spraying the wood body by setting a cleaning component, so as to avoid the residual impurities such as dust and debris that affect the spraying effect. At the same time, the cleaned dust can be extracted and collected to avoid affecting the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the machine body of the present invention;

[0022] Figure 3 For the present invention Figure 2 Front view;

[0023] Figure 4 It is a schematic diagram of the structure of the annular drive frame and the annular cover of the present invention;

[0024] Figure 5 It is a schematic cross-sectional view of the drive frame and the annular cover of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the liquid guide end of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram at B in the middle.

[0028] In the figure: 1, machine body; 101, control panel; 2, storage box; 3, pump; 4, feed belt; 5, wood body; 6, discharge belt; 7, negative pressure cleaning frame; 701, elastic cleaning sheet; 8, rectangular negative pressure frame; 9, drive motor; 901, drive gear; 10, right-angle positioning frame; 11, ring drive frame; 1101, limit groove; 1102, transmission gear plate; 12, ring cover; 13, drying frame; 1301, fixing rod; 14, liquid guide ring frame; 1401, limit plate; 15, liquid guide rod; 1501, corrugated end pipe; 1502, rotating shaft; 1503, limit ball; 16, liquid guide end; 1601, limit ring sleeve; 1602, counterweight; 1603, positioning bolt; 17, atomizing nozzle; 18, hydraulic cylinder; 1801, limit frame; 19, elastic sealing cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 The present invention provides two technical solutions, which specifically include the following embodiments:

[0031] Embodiment 1: In the embodiment of the present invention, reference Figure 1-Figure 8 An environmentally friendly wood processing and painting equipment comprises a body 1, wherein a feeding belt 4 and a discharging belt 6 are respectively installed inside the body 1 for conveying a wood body 5, wherein the feeding belt 4 and the discharging belt 6 are both existing devices, driven by a separate motor, for realizing the conveying operation of the wood body 5;

[0032] In the embodiment of the present invention, further, the body 1 is rotatably connected with an annular driving frame 11, and a liquid guide ring frame 14 is fixed to the outside of the annular driving frame 11. The installation position of the annular driving frame 11 is located between the conveyor belt 4 and the discharge belt 6. The annular driving frame 11 is used to drive the outer liquid guide ring frame 14 to reciprocate inside the body 1. When the wood body 5 is transported with the conveyor belt 4, it can pass through the liquid guide ring frame 14 and the annular driving frame 11, and then the discharge belt 6 realizes the output operation;

[0033] In the embodiment of the present invention, specifically, a plurality of liquid guiding rods 15 are rotatably connected to the outer side of the liquid guiding ring frame 14, and a corrugated end tube 1501 is fixed between the end of the liquid guiding rod 15 and the liquid guiding ring frame 14, an annular cover 12 is fixed to the outer side of the annular driving frame 11, and a plurality of hydraulic cylinders 18 are rotatably connected to the inner side of the annular cover 12, which are used to drive the liquid guiding rod 15 to operate and adjust the angle according to the wood body 5 of different sizes and shapes; the end of the liquid guiding rod 15 away from the corrugated end tube 1501 is rotatably connected to the liquid guiding end 16, and a counterweight block 1602 is fixedly installed at the outer center position of the liquid guiding end 16, and a plurality of atomizing nozzles 17 are installed on the side of the liquid guiding end 16 close to the wood body 5, and the liquid guiding end 16 at its end can always be kept equidistant from the surface of the wood body 5 by adjusting the angle of the liquid guiding rod 15;

[0034] In the embodiment of the present invention, specifically, a distance meter is provided inside the liquid guiding end 16 for sensing the distance between the liquid guiding end 16 and the wood body 5. When the annular driving frame 11 drives the liquid guiding ring frame 14 to rotate, the liquid guiding rod 15 can rotate along with the liquid guiding ring frame 14. At this time, when the distance between the liquid guiding end 16 at the end of the liquid guiding rod 15 and the wood body 5 is getting closer and closer during the rotation process, the hydraulic cylinder 18 can be retracted to adjust the angle of the liquid guiding rod 15, so that when the liquid guiding rod 15 rotates along with the liquid guiding ring frame 14, the distance between the end of the liquid guiding rod 15 and the wood body 5 can be kept constant.

[0035] In the embodiment of the present invention, further, a limiting ball 1503 is fixed to one end of the liquid guiding rod 15 away from the corrugated end tube 1501, a limiting ring sleeve 1601 is fixed to the outside of the liquid guiding end head 16, and the limiting ball 1503 is rotatably installed inside the limiting ring sleeve 1601, so that the atomizing nozzle 17 outside the liquid guiding end head 16 can maintain translation through the cooperation of the counterweight block 1602, and a positioning bolt 1603 is provided inside the limiting ring sleeve 1601 for locking the limiting ball 1503;

[0036] In the embodiment of the present invention, specifically, by setting the counterweight block 1602, when the liquid guide end 16 moves along with the liquid guide rod 15, the atomizing nozzle 17 outside the liquid guide end 16 always remains parallel to the surface of the wood body 5, that is, the spraying operation is achieved by the reciprocating translation of the atomizing nozzle 17;

[0037] In the embodiment of the present invention, specifically, the above spraying method is applicable to a rectangular wood body 5, referring to Figure 1-Figure 8Before spraying, first lock the liquid guide ends 16 located on the left and right sides of the wood body 5, that is, lock the limit ball 1503 by twisting the positioning bolt 1603. At this time, when the liquid guide rod 15 rotates with the liquid guide ring frame 14, the spraying surface of the atomizing nozzle 17 on the side of the liquid guide end 16 is arc-shaped, which is used for spraying the left and right sides of the wood body 5. Since the liquid guide ends 16 located on the upper and lower sides of the wood body 5 are not locked, when the liquid guide rod 15 rotates with the liquid guide ring frame 14, the liquid guide end 16 can drive the atomizing nozzle 17 to rotate through the cooperation of the counterweight block 1602, so that the spraying surface of the atomizing nozzle 17 is flat, so as to realize the spraying operation on the upper and lower sides of the wood body 5, and complete the spraying by reciprocating swinging of multiple atomizing nozzles 17, which is more convenient than the traditional spraying method and can improve the spraying uniformity of the wood body 5.

[0038] In the embodiment of the present invention, further, when spraying the columnar wood body 5, it is only necessary to lock all the liquid guide ends 16 through the corresponding positioning bolts 1603, and then drive the liquid guide rod 15 to adjust the angle through the operation of the hydraulic cylinder 18, so that it is suitable for the wood body 5 of the corresponding size, and then drive the liquid guide ring frame 14 and the plurality of liquid guide rods 15 to reciprocate through the reciprocating operation of the annular driving frame 11, so as to perform the spraying operation on the wood body 5;

[0039] In the embodiment of the present invention, specifically, a driving assembly is provided inside the machine body 1, which is used to drive the annular driving frame 11 to operate inside the machine body 1, and the driving assembly includes a driving motor 9, which is fixed inside the machine body 1, and a driving gear 901 is fixedly sleeved on the output end of the driving motor 9, and a transmission gear plate 1102 is fixedly installed on the outer side of the annular driving frame 11, and the driving gear 901 and the transmission gear plate 1102 are meshed with each other. The driving motor 9 is an existing forward and reverse motor, and can realize the driving operation through the forward and reverse rotation of its output end;

[0040] In the embodiment of the present invention, specifically, the end of the hydraulic cylinder 18 is rotatably connected to the limit frame 1801, the limit frame 1801 is fixedly installed on the inner side of the annular cover 12, and the piston end of the hydraulic cylinder 18 is rotatably connected to the corresponding liquid guide rod 15. The hydraulic cylinder 18 is an existing hydraulic drive device and will not be described in detail here.

[0041] In the embodiment of the present invention, specifically, a plurality of limit plates 1401 are fixedly installed on the outer side of the liquid guide ring frame 14, and the end of the liquid guide rod 15 is rotatably connected with a rotating shaft 1502, and the rotating shaft 1502 is rotatably installed inside the limit plate 1401. When the liquid guide rod 15 is adjusted in angle, it can rotate inside the limit plate 1401 through the cooperation of the rotating shaft 1502;

[0042] In the embodiment of the present invention, specifically, right-angle positioning frames 10 are fixedly installed on both sides of the interior of the body 1, a limiting groove 1101 is provided inside the annular driving frame 11, and a limiting slider is installed outside the right-angle positioning frame 10. The limiting slider is not shown in the figure, and the limiting slider is slidably connected inside the limiting groove 1101, so that the right-angle positioning frame 10 and the annular driving frame 11 can be rotatably connected to ensure the operation stability of the annular driving frame 11;

[0043] In the embodiment of the present invention, specifically, a control panel 101 is installed on the outside of the machine body 1, and the control panel 101 is controlled based on an existing PLC control module. A drying rack 13 is fixed inside the machine body 1 for drying the wood body 5 after spraying. Fixed rods 1301 are fixedly connected between the two sides of the drying rack 13 and the inner wall of the machine body 1. The drying rack 13 is an existing hot air drying device for drying the wood body 5 after spraying.

[0044] In the embodiment of the present invention, specifically, a storage box 2 is fixedly installed on the top surface of the body 1, and a pump 3 connected to the storage box 2 is installed at the end of the storage box 2. The pump 3 is an existing device for extracting paint for spraying. A hose is connected between the liquid outlet end of the pump 3 and the liquid guide ring frame 14 to transport the prepared paint, so that the paint can enter the liquid guide end 16 through the liquid guide ring frame 14 and multiple liquid guide rods 15, and then be sprayed out by multiple atomizing nozzles 17 to realize the spraying operation of the wood body 5;

[0045] In the embodiment of the present invention, specifically, the atomizing nozzle 17 is an existing device, and the required size can be selected according to the needs, and no further description is given here. The atomizing nozzle 17 is connected to the liquid guide end 16, and the liquid guide end 16 is connected to the limiting ball 1503 and the liquid guide rod 15 to realize the paint conveying operation;

[0046] In the embodiment of the present invention, specifically, by cooperating with the corrugated end tube 1501, it is possible to avoid affecting the angle adjustment of the liquid guide rod 15, while ensuring the paint conveying effect;

[0047] In the embodiment of the present invention, specifically, an elastic sealing cover 19 is connected between the limiting ring sleeve 1601 and the liquid guiding rod 15 to ensure the sealing performance of the limiting ring sleeve 1601 and avoid leakage of paint during the transportation process.

[0048] Embodiment 2: Based on embodiment 1, on the basis of embodiment 1, further, there are two conveyor belts 4 and a cleaning component is provided between the two conveyor belts 4, which is used to clean the surface of the wood body 5, and the cleaning component includes a negative pressure cleaning frame 7, which is fixedly installed inside the machine body 1, and the installation position of the negative pressure cleaning frame 7 is located between the two conveyor belts 4, and a plurality of elastic cleaning sheets 701 are fixedly installed on the inner side of the negative pressure cleaning frame 7, and a negative pressure device is fixedly installed on the outside of the machine body 1, and the negative pressure device and the negative pressure cleaning frame 7 are connected to each other. During the transportation process of the wood body 5, as it contacts with the elastic cleaning sheets 701, the dust and impurities such as residual wood chips on the surface of the wood body 5 can be cleaned to ensure the subsequent spraying effect, and at the same time, through the operation of the negative pressure device, the dust can be extracted and collected by the negative pressure cleaning frame 7 to avoid affecting the working environment;

[0049] In the embodiment of the present invention, specifically, a plurality of extraction holes are provided on the inner side of the negative pressure cleaning frame 7, which are used to collect and process dust when the elastic cleaning sheet 701 cleans the surface of the wood body 5;

[0050] In the embodiment of the present invention, specifically, a rectangular negative pressure frame 8 is fixedly installed inside the body 1, and the rectangular negative pressure frame 8 is interconnected with the negative pressure device. Through the setting of the rectangular negative pressure frame 8, when the spraying operation is performed, the atomized paint in the air can be extracted through the setting of the rectangular negative pressure frame 8 to avoid affecting the working environment.

[0051] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0052] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An environmentally friendly wood processing and painting device, comprising a body (1), characterized in that: A feeding belt (4) and a discharging belt (6) are respectively installed inside the machine body (1) for conveying the wood body (5); An annular driving frame (11) is rotatably connected inside the machine body (1), a liquid guide ring frame (14) is fixed outside the annular driving frame (11), the installation position of the annular driving frame (11) is located between the conveyor belt (4) and the discharge belt (6), and the annular driving frame (11) is used to drive the outer liquid guide ring frame (14) to reciprocate inside the machine body (1); A plurality of liquid guiding rods (15) are rotatably connected to the outside of the liquid guiding ring frame (14), and a corrugated end tube (1501) is fixed between the end of the liquid guiding rod (15) and the liquid guiding ring frame (14). An annular cover (12) is fixed to the outside of the annular driving frame (11), and a plurality of hydraulic cylinders (18) are rotatably connected inside the annular cover (12) for driving the liquid guiding rod (15) to operate and adjust the angle according to the wood body (5) of different sizes and shapes. The end of the liquid guiding rod (15) away from the corrugated end tube (1501) is rotatably connected to a liquid guiding end head (16), a counterweight block (1602) is fixedly installed at the center position of the outside of the liquid guiding end head (16), and a plurality of atomizing nozzles (17) are installed on the side of the liquid guiding end head (16) close to the wood body (5); A limiting ball (1503) is fixed to one end of the liquid guiding rod (15) away from the corrugated end tube (1501), a limiting ring sleeve (1601) is fixed to the outside of the liquid guiding end head (16), and the limiting ball (1503) is rotatably mounted inside the limiting ring sleeve (1601), so that the atomizing nozzle (17) outside the liquid guiding end head (16) can maintain translational movement through the cooperation of the counterweight block (1602), and a positioning bolt (1603) is provided inside the limiting ring sleeve (1601) for locking the limiting ball (1503); The end of the hydraulic cylinder (18) is rotatably connected to a limiting frame (1801), the limiting frame (1801) is fixedly mounted on the inner side of the annular cover (12), and the piston end of the hydraulic cylinder (18) is rotatably connected to a corresponding liquid guide rod (15); A plurality of limit plates (1401) are fixedly mounted on the outer side of the liquid guiding ring frame (14); the end of the liquid guiding rod (15) is rotatably connected to a rotating shaft (1502); the rotating shaft (1502) is rotatably mounted inside the limit plate (1401); and an elastic sealing cover (19) is connected between the limit ring sleeve (1601) and the liquid guiding rod (15); A right-angle positioning frame (10) is fixedly installed on both sides of the interior of the machine body (1), a limiting groove (1101) is provided inside the annular driving frame (11), and a limiting slider is installed on the outer side of the right-angle positioning frame (10), and the limiting slider is slidably connected inside the limiting groove (1101); A control panel (101) is installed on the outside of the machine body (1), and a drying rack (13) is fixed inside the machine body (1) for drying the wood body (5) after spraying. Fixed rods (1301) are fixedly connected between the two sides of the drying rack (13) and the inner wall of the machine body (1); There are two conveyor belts (4), and a cleaning component is provided between the two conveyor belts (4), which is used to clean the surface of the wood body (5). The cleaning component includes a negative pressure cleaning frame (7), which is fixedly installed inside the machine body (1), and the installation position of the negative pressure cleaning frame (7) is located between the two conveyor belts (4). A plurality of elastic cleaning sheets (701) are fixedly installed on the inner side of the negative pressure cleaning frame (7), and a negative pressure device is fixedly installed on the outside of the machine body (1), and the negative pressure device and the negative pressure cleaning frame (7) are connected to each other.

2. The environmentally friendly wood processing and painting equipment according to claim 1 is characterized by: A driving assembly is provided inside the machine body (1) for driving the annular driving frame (11) to operate inside the machine body (1); the driving assembly comprises a driving motor (9); the driving motor (9) is fixed inside the machine body (1); a driving gear (901) is fixedly sleeved on the output end of the driving motor (9); a transmission gear plate (1102) is fixedly mounted on the outer side of the annular driving frame (11); the driving gear (901) and the transmission gear plate (1102) are meshed with each other.

3. The environmentally friendly wood processing and painting equipment according to claim 1 is characterized by: A storage box (2) is fixedly mounted on the top surface of the machine body (1), a pump (3) in communication with the storage box (2) is mounted at the end of the storage box (2), and a hose is connected between the liquid outlet end of the pump (3) and the liquid guide ring frame (14) for conveying the prepared paint.

4. The environmentally friendly wood processing and painting equipment according to claim 1 is characterized by: A plurality of extraction holes are provided on the inner side of the negative pressure cleaning frame (7) for collecting and processing dust when the elastic cleaning sheet (701) cleans the surface of the wood body (5).

5. The environmentally friendly wood processing and painting equipment according to claim 1 is characterized by: A rectangular negative pressure frame (8) is fixedly installed inside the machine body (1), and the rectangular negative pressure frame (8) is communicated with the negative pressure device.

Images