A kind of solid wood composite floor anti-static coating spraying device

Abstract

The utility model discloses a kind of solid wood composite floor antistatic coating spraying devices, by conveying device, dust removal device, coating supply device, static elimination spraying device and recycling device constitute. Dust removal device includes upper dust removal component and lower dust removal component, accurate adjustment is passed through lifting cylinder, utilize dust removal pipe to connect external device, can remove dust on the upper and lower surface of floor in all directions, enhance coating adhesion. In static elimination spraying device, static elimination stick first eliminates static, drive spray head mounting plate lifting by transmission screw rod, ensure uniform spraying of coating. Coating supply device can stir uniform coating and stable feed, recycling device can collect dropped coating recycling. Conveying device selects roller conveyor, guarantee floor stable transmission. Each component cooperates operation, effectively improve the floor spraying quality and efficiency, with environmental protection, meet the demand of special environment to antistatic floor.

Description

Technical Field

[0001] This utility model relates to the field of solid wood composite flooring technology, specifically to an antistatic coating spraying device for solid wood composite flooring. Background Technology

[0002] As people's living standards improve, the performance requirements for engineered wood flooring are also increasing. In some special environments, such as electronic equipment rooms and laboratories, the flooring must have good antistatic properties to prevent static electricity from damaging electronic equipment. Existing flooring spraying equipment is often single-function and cannot effectively remove dust from the floor surface before spraying the antistatic coating, resulting in poor coating adhesion. Moreover, during the spraying process, it cannot simultaneously and efficiently eliminate static electricity, which can easily lead to uneven coating, pitting, and other quality problems, affecting the antistatic effect and aesthetics of the flooring. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The technical problem this invention aims to solve is that existing floor spraying devices have limited functionality. Before spraying an antistatic coating, they cannot effectively remove dust from the floor surface, resulting in poor coating adhesion. Furthermore, during the spraying process, they cannot simultaneously and efficiently eliminate static electricity, which can easily lead to uneven coating, pitting, and other quality issues.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] An antistatic coating spraying device for solid wood composite flooring includes a conveying device, a dust removal device, a paint supply device, and an antistatic spraying device.

[0008] The dust removal device is mounted on the conveying device, the anti-static spraying device is mounted at the rear of the dust removal device and on the conveying device, and the paint supply device is mounted on the side of the conveying device.

[0009] The dust removal device includes an upper dust removal component and a lower dust removal component. The upper dust removal component is disposed at the upper end of the conveying device, and the lower dust removal component is symmetrically disposed with respect to the upper dust removal component and disposed at the lower end of the conveying device.

[0010] The anti-static spraying device includes a spray box, a transmission screw, a slide bar, a connecting plate, a nozzle mounting plate, a paint nozzle, and an anti-static rod. The spray box is mounted on the conveying device. The middle part of the transmission screw is connected to the upper end cover of the spray box by a threaded connection. The lower end of the transmission screw is connected to the middle part of the connecting plate through a bearing. The end of the transmission screw away from the connecting plate extends out of the top of the spray box and connects to an external motor. The nozzle mounting plate has two symmetrically arranged on both sides of the connecting plate. Each nozzle mounting plate is equipped with a paint nozzle. Each nozzle mounting plate has an anti-static rod on its side surface. There are two slide bars, and the two ends of the two slide bars are respectively fixedly connected to the upper surface of the connecting plate. The two slide bars are also connected to the upper end cover of the spray box through sliding sleeves.

[0011] Furthermore, the conveying device is a roller conveyor.

[0012] Furthermore, the upper dust removal assembly includes an upper dust removal hood, an upper dust removal shell, and a lifting cylinder. The upper dust removal hood is fixedly mounted on the conveying device, and the lower end face of the upper dust removal shell is provided with a plurality of first dust removal holes penetrating the lower end face of the dust removal shell. The upper dust removal shell is disposed inside the upper dust removal hood. The outer shell of the lifting cylinder is connected to the upper end face of the upper dust removal hood by long bolts, and the telescopic rod of the lifting cylinder passes through the upper end face of the upper dust removal hood and is fixedly connected to the top end face of the upper dust removal shell.

[0013] Furthermore, the lower dust removal mechanism assembly includes a lower dust removal hood and a lower dust removal shell. The lower dust removal hood is disposed at the lower part of the conveying device and is fixedly connected to the conveying device. The lower dust removal hood has the same structure as the upper dust removal hood. The lower dust removal shell is fixedly disposed on the lower dust removal hood, and the upper end face of the lower dust removal shell is provided with a plurality of second dust removal holes.

[0014] Furthermore, the upper dust collector housing is provided with an upper dust collector pipe, one end of which is connected to the interior of the upper dust collector housing, and the other end is connected to an external dust collection device.

[0015] Furthermore, the lower dust collector housing is provided with a lower dust collector pipe, one end of which is connected to the interior of the lower dust collector housing, and the other end is connected to an external dust collection device.

[0016] Furthermore, the horizontal height of the lower end face of the two static elimination rods is higher than the horizontal height of the lower end face of the paint spray head.

[0017] Furthermore, the paint supply equipment includes a mixing tank, a mixing motor, and a supply pump. The mixing motor is fixedly mounted on the mixing tank, and its shaft extends into the interior of the mixing tank and is connected to a mixing rod. The inlet of the supply pump is connected to the interior of the mixing tank via a PP pipe, and the outlet is connected to the paint nozzle via a flexible hose.

[0018] Furthermore, the bottom surface of the mixing tank is inclined, and a pad is provided on one side of the bottom surface of the mixing tank, the pad being located on the side of the bottom surface of the mixing tank that is more inclined.

[0019] Furthermore, it also includes a recycling device, which comprises a receiving base plate, a return pipe, two return pumps, and a return box. The receiving base plate is in the shape of an inverted funnel and is located at the bottom of the spray box and is fixedly mounted on the conveying device. One end of the return pipe is connected to the receiving base plate, and the other end is connected to the inlet of the two return pumps respectively. The outlet of the two return pumps is connected to the return box through PP pipes. The two return pumps and the return box are all mounted on the mixing tank.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] 1. The dust removal device of this utility model, through the dust removal components arranged symmetrically at the top and bottom, can thoroughly remove dust from the upper and lower surfaces of the floor, improve the adhesion of the coating, and ensure the quality of the antistatic coating of the floor.

[0023] 2. The anti-static spraying device rationally arranges the static elimination rod and paint nozzle, eliminating static electricity before spraying, effectively avoiding the impact of static electricity on the spraying effect, making the coating more uniform and beautiful, and ensuring the floor's good anti-static performance.

[0024] 3. The recycling device enables the recycling and reuse of paint, reducing paint waste and lowering production costs. Attached image description:

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the dust removal device and the paint supply device of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the electrostatic spraying device and the recycling device of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the dust removal component of this utility model;

[0029] Figure 5 This is a schematic diagram of the dust removal component of this utility model.

[0030] Marked in the image:

[0031] 1-Conveying device;

[0032] 2-Dust removal device, including 201-upper dust removal component, 202-lower dust removal component, 201a-upper dust removal hood, 201b-upper dust removal shell, 201c-lifting cylinder, 201d-first dust removal hole, 201e-upper dust removal pipe, 202a-lower dust removal hood shell, 202b-lower dust removal shell, 202c-second dust removal hole, 202d-lower dust removal pipe;

[0033] 3-Paint feeding device, comprising 301-mixing tank, 302-mixing motor, 303-feeding pump, and 304-pad;

[0034] 4-Antistatic spraying device, comprising 401-spraying box, 402-transmission screw, 403-slide bar, 404-connecting plate, 405-spray head mounting plate, 406-paint spray head, and 407-static eliminator bar;

[0035] 5-Recycling device, including 501-receiving base plate, 502-return pipe, 503-return pump, and 504-return box. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Please see Figures 1-5 The device shown is an antistatic coating spraying device for solid wood composite flooring, comprising a conveying device 1, a dust removal device 2, a paint supply device 3, and an antistatic spraying device 4.

[0039] The dust removal device 2 is installed on the conveying device 1, the anti-static spraying device 4 is installed at the rear of the dust removal device 2 and on the conveying device 1, and the paint supply device 3 is installed on the side of the conveying device 1.

[0040] The dust removal device 2 includes an upper dust removal component 201 and a lower dust removal component 202. The upper dust removal component 201 is disposed at the upper end of the conveying device 1, and the lower dust removal component 202 is symmetrically disposed with the upper dust removal component 201 and disposed at the lower end of the conveying device 1.

[0041] The upper dust removal assembly 201 includes an upper dust removal hood 201a, an upper dust removal shell 201b, and a lifting cylinder 201c. The upper dust removal hood 201a is fixedly mounted on the conveying device 1, and the lower end face of the upper dust removal shell 201b has multiple first dust removal holes 201e penetrating the lower end face of the upper dust removal shell 201b. The upper dust removal shell 201b is located inside the upper dust removal hood 201a. The outer shell of the lifting cylinder 201c is connected to the upper end face of the upper dust removal hood 201a by long bolts, and the telescopic rod of the lifting cylinder 201c passes through the upper end face of the upper dust removal hood 201a and is fixedly connected to the top end face of the upper dust removal shell 201b. The distance between the upper dust removal shell 201b and the upper surface of the floor can be adjusted by the lifting cylinder 201c to adapt to different floor thicknesses and enhance the dust removal effect.

[0042] The lower dust removal assembly 202 includes a lower dust removal cover 202a and a lower dust removal shell 202b. The lower dust removal cover 202a is located at the lower part of the conveying device 1 and is fixedly connected to the conveying device 1. The lower dust removal cover 202a has the same structure as the upper dust removal cover 201a. The lower dust removal shell 202b is fixedly mounted on the lower dust removal cover 202a, and the upper end face of the lower dust removal shell 202b is provided with multiple second dust removal holes 202c. The upper and lower dust removal assemblies work together to remove dust from the upper and lower surfaces of the floor from all directions, ensuring the adhesion of the coating.

[0043] The upper dust collector housing 201b is equipped with an upper dust collector pipe 201e. One end of the upper dust collector pipe 201e is connected to the interior of the upper dust collector housing 201b, and the other end is connected to an external dust collection device for removing dust.

[0044] The lower dust collector housing 202b is equipped with a lower dust collector pipe 202d. One end of the lower dust collector pipe 202d is connected to the interior of the lower dust collector housing 202b, and the other end is connected to the external dust collection equipment, which is also used to remove dust.

[0045] The anti-static spraying device 4 includes a spray box 401, a transmission screw 402, a slide bar 403, a connecting plate 404, a nozzle mounting plate 405, a paint nozzle 406, and an anti-static rod 407. The spray box 401 is mounted on the conveying device 1. The middle part of the transmission screw 402 is connected to the upper end cover of the spray box 401 by a threaded connection. The lower end of the transmission screw 402 is connected to the middle part of the connecting plate 404 by a bearing. The end of the transmission screw 402 away from the connecting plate 404 extends out of the top of the spray box 401 and is connected to an external motor. The motor drives the transmission screw 402 to rotate, which can drive the connecting plate 404 to move up and down, thereby adjusting the height of the nozzle mounting plate 405 and the anti-static rod 407 to adapt to different specifications of flooring.

[0046] The nozzle mounting plate 405 has two symmetrically arranged on both sides of the connecting plate 404. Each nozzle mounting plate 405 is equipped with a paint nozzle 406. Each nozzle mounting plate 405 has a static elimination rod 407 on its side surface. The horizontal height of the lower end surface of the two static elimination rods 407 is higher than the horizontal height of the lower end surface of the paint nozzle 406. Static electricity is eliminated before the paint is sprayed to prevent static electricity from affecting the spraying effect and to ensure a uniform coating.

[0047] There are two slide rods 403, and the two ends of the two slide rods 403 are fixedly connected to the upper end face of the connecting plate 404 respectively. At the same time, the two slide rods 403 are also connected to the upper end cover of the spray box 401 through the sliding sleeve. The slide rods 403 play a guiding role to ensure that the connecting plate 404 rises and falls smoothly.

[0048] The paint supply device 3 includes a mixing tank 301, a mixing motor 302, and a feed pump 303. The mixing motor 302 is fixedly mounted on the mixing tank 301, and its shaft extends into the interior of the mixing tank 301 and is connected to a mixing rod. The mixing motor 302 drives the mixing rod to rotate, so that the paint is mixed evenly. The feed inlet of the feed pump 303 is connected to the interior of the mixing tank 301 through a PP pipe, and the discharge outlet is connected to the paint nozzle 406 through a hose, providing a stable supply of paint for spraying.

[0049] The bottom surface of the mixing tank 301 is inclined, and a pad 304 is provided on one side of the bottom surface of the mixing tank 301. The pad 304 is located on the side of the bottom surface of the mixing tank 301 that is more inclined, so that the paint can flow to the inlet of the feed pump 303 and avoid paint residue.

[0050] It also includes a recycling device 5, which comprises a receiving base plate 501, a return pipe 502, two return pumps 503, and a return box 504. The receiving base plate 501 is in the shape of an inverted funnel and is located at the bottom of the spray box 401 and is fixedly mounted on the conveying device 1 to collect the paint dripping during the spraying process. One end of the return pipe 502 is connected to the receiving base plate 501, and the other end is connected to the inlet of the two return pumps 503 respectively. The outlets of the two return pumps 503 are connected to the return box 504 through PP pipes. The two return pumps 503 and the return box 504 are all mounted on the mixing tank 301 to realize the recycling and reuse of paint and reduce waste and pollution.

[0051] Furthermore, the conveying device 1 is a roller conveyor, which provides stable transport and ensures that the floor passes through each processing stage at a uniform speed.

[0052] Working principle:

[0053] The entire device is powered by the conveyor 1, which uses a built-in motor to drive the rollers. Once the motor is powered on, it operates at a preset speed, causing the rollers to rotate at a uniform speed. The floorboards are placed on the rollers, and due to the friction between the rollers and the floorboards, they are smoothly conveyed forward, ensuring a stable travel speed in subsequent processing stages and providing a fundamental guarantee for precise operation.

[0054] When the floor moves into the working area of ​​the dust removal device 2 along with the conveyor, the dust removal device 2 is activated.

[0055] In the upper dust removal assembly 201, the lifting cylinder 201c first operates based on the floor thickness information fed back by a preset program. Its internal air pressure control system adjusts the extension and retraction length of the cylinder's telescopic rod, ensuring that the first dust removal hole 201e on the lower end face of the upper dust removal shell 201b maintains an optimal distance from the upper floor surface, typically between a few millimeters and tens of millimeters, to achieve efficient dust collection. At this time, the externally connected dust removal equipment generates a strong negative pressure suction through the upper dust removal pipe 201e. Under the action of negative pressure, dust particles on the upper floor surface are sucked into the upper dust removal shell 201b and drawn along the upper dust removal pipe 201e to the dust collection bag or other processing unit of the dust removal equipment, completing the removal of dust from the upper surface.

[0056] The working principle of the lower dust removal component 202 is similar. The lower dust removal housing 202a is fixed below the conveying device, and the second dust removal hole 202c on the lower dust removal housing 202b is aligned with the lower surface of the floor. Similarly, relying on the negative pressure generated by the external dust removal equipment through the lower dust removal pipe 202d, the dust on the lower surface is sucked into the lower dust removal housing 202b and then extracted, realizing all-round dust removal and purification of the upper and lower surfaces of the floor, creating good conditions for subsequent coating adhesion.

[0057] The dust-removed floor continues into the area below the anti-static spraying device 4. At this point, the static eliminator 407 in the anti-static spraying device is activated. The static eliminator typically uses ionization technology; its internal high-voltage generator produces a high voltage, ionizing the air around the tip of the rod and creating a large number of positive and negative ions. These ions move directionally under the influence of the electric field, contacting areas on the floor surface that carry static charge, neutralizing the static charge on the floor, and rapidly reducing the static potential of the floor to a safe range. This typically reduces the static voltage to below tens of volts, effectively preventing static interference with the subsequent spraying process.

[0058] Simultaneously with the elimination of static electricity, the paint supply device 3 begins operation. The stirring motor 302 inside the mixing tank 301 operates continuously, its shaft driving the stirring rod to rotate at high speed, thoroughly mixing the paint to ensure that the paint's composition, concentration, and antistatic properties remain consistent throughout the spraying process. The supply pump 303, driven by a motor, generates suction through its impeller, drawing the paint from the mixing tank into the pump body via a PP pipe, and then delivering it to the paint nozzles 406 through the outlet hose, spraying the paint evenly. The paint nozzles 406, symmetrically arranged on both sides of the nozzle mounting plate 405, can cover a certain width of the floor surface. As the conveyor moves the floor, the nozzles continuously spray, achieving comprehensive and uniform coating of the floor surface. Simultaneously, because static electricity has been effectively eliminated, paint droplets can spread and adhere evenly to the floor surface, avoiding coating defects caused by static adsorption or repulsion, thus forming a high-quality antistatic coating.

[0059] During the spraying process, some paint dripping is inevitable. At this point, the recycling device 5 comes into play. The receiving base plate 501 is designed in an inverted funnel shape, and its wide opening can catch the dripping paint to the maximum extent. Under the influence of gravity, the paint collects at the connection point at the bottom of the receiving base plate, awaiting subsequent recycling.

[0060] The paint collected by the receiving base plate 501 flows into the inlet of the return pump 503 through the return pipe 502. After the return pump 503 starts, its internal impeller rotates to generate pressure, pumping the paint through the PP pipe to the return box 504. The return box 504 serves as a temporary storage unit.

[0061] The embodiments are detailed, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for spraying an antistatic coating on solid wood composite flooring, characterized in that: It includes a conveying device (1), a dust removal device (2), a paint supply device (3), and an anti-static spraying device (4); The dust removal device (2) is installed on the conveying device (1), the anti-static spraying device (4) is installed at the rear of the dust removal device (2) and on the conveying device (1), and the paint supply device (3) is installed on the side of the conveying device (1). The dust removal device (2) includes an upper dust removal component (201) and a lower dust removal component (202). The upper dust removal component (201) is disposed at the upper end of the conveying device (1), and the lower dust removal component (202) is symmetrically disposed with the upper dust removal component (201) and disposed at the lower end of the conveying device (1). The antistatic spraying device (4) includes a spray box (401), a transmission screw (402), a slide bar (403), a connecting plate (404), a nozzle mounting plate (405), a paint nozzle (406), and an antistatic rod (407). The spray box (401) is mounted on the conveying device (1). The middle part of the transmission screw (402) is connected to the upper end cover of the spray box (401) by a threaded connection. The lower end of the transmission screw (402) is connected to the middle part of the connecting plate (404) by a bearing. The end of the transmission screw (402) away from the connecting plate (404) extends out of the... The top of the spray box (401) is connected to an external motor. The nozzle mounting plate (405) has two symmetrically arranged on both sides of the connecting plate (404). Each nozzle mounting plate (405) is provided with a paint nozzle (406). Each nozzle mounting plate (405) has a static elimination rod (407) on its side surface. There are two slide rods (403), and the two ends of the two slide rods (403) are respectively fixedly connected to the upper end surface of the connecting plate (404). At the same time, the two slide rods (403) are also connected to the upper end cover of the spray box (401) through a sliding sleeve.

2. The antistatic coating spraying device for solid wood composite flooring according to claim 1, characterized in that: The conveying device (1) is a roller conveyor.

3. The antistatic coating spraying device for solid wood composite flooring according to claim 1, characterized in that: The upper dust removal assembly (201) includes an upper dust removal hood (201a), an upper dust removal shell (201b), and a lifting cylinder (201c). The upper dust removal hood (201a) is fixedly mounted on the conveying device (1), and the lower end face of the upper dust removal shell (201b) is provided with a plurality of first dust removal holes (201d) penetrating the lower end face of the upper dust removal shell (201b). The upper dust removal shell (201b) is disposed inside the upper dust removal hood (201a). The outer shell of the lifting cylinder (201c) is connected to the upper end face of the upper dust removal hood (201a) by long bolts. The telescopic rod of the lifting cylinder (201c) passes through the upper end face of the upper dust removal hood (201a) and is fixedly connected to the top end face of the upper dust removal shell (201b).

4. The antistatic coating spraying device for solid wood composite flooring according to claim 3, characterized in that: The lower dust removal assembly (202) includes a lower dust removal hood (202a) and a lower dust removal shell (202b). The lower dust removal hood (202a) is disposed at the lower part of the conveying device (1) and the conveying device (1) is fixedly connected. The lower dust removal hood (202a) has the same structure as the upper dust removal hood (201a). The lower dust removal shell (202b) is fixedly disposed on the lower dust removal hood (202a), and the upper end face of the lower dust removal shell (202b) is provided with a plurality of second dust removal holes (202c).

5. The antistatic coating spraying device for solid wood composite flooring according to claim 3, characterized in that: The upper dust collector housing (201b) is provided with an upper dust collector pipe (201e). One end of the upper dust collector pipe (201e) is connected to the interior of the upper dust collector housing (201b), and the other end is connected to an external dust collection device.

6. The antistatic coating spraying device for solid wood composite flooring according to claim 4, characterized in that: The lower dust collector housing (202b) is provided with a lower dust collector pipe (202d). One end of the lower dust collector pipe (202d) is connected to the interior of the lower dust collector housing (202b), and the other end is connected to an external dust collection device.

7. The antistatic coating spraying device for solid wood composite flooring according to claim 1, characterized in that: The horizontal height of the lower end face of the two static elimination rods (407) is higher than the horizontal height of the lower end face of the paint spray head (406).

8. The antistatic coating spraying device for solid wood composite flooring according to claim 1, characterized in that: The paint supply device (3) includes a mixing tank (301), a stirring motor (302), and a feed pump (303). The stirring motor (302) is fixedly mounted on the mixing tank (301), and its rotating shaft extends into the interior of the mixing tank (301) and is connected to a stirring rod. The feed inlet of the feed pump (303) is connected to the interior of the mixing tank (301) through a PP pipe, and the discharge outlet is connected to the paint nozzle (406) through a hose.

9. The antistatic coating spraying device for solid wood composite flooring according to claim 8, characterized in that: The bottom surface of the mixing tank (301) is inclined, and a pad (304) is provided on one side of the bottom surface of the mixing tank (301). The pad (304) is located on the side of the bottom surface of the mixing tank (301) that is more inclined.

10. The antistatic coating spraying device for solid wood composite flooring according to claim 9, characterized in that: It also includes a recycling device (5), which includes a receiving base plate (501), a return pipe (502), two return pumps (503) and a return box (504). The receiving base plate (501) is in the shape of an inverted funnel and is located at the bottom of the spray box (401) and is fixedly installed on the conveying device (1). One end of the return pipe (502) is connected to the receiving base plate (501) and the other end is connected to the inlet of the two return pumps (503) respectively. The outlet of the two return pumps (503) is connected to the return box (504) through a PP pipe. The two return pumps (503) and the return box (504) are both installed on the mixing tank (301).

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