A spray pre-treatment device and a coating assembly line

Abstract

The utility model discloses a kind of spray pretreatment equipment, coating assembly line, and spray pretreatment equipment includes spray chamber, built-in spray pipeline of spray chamber and degreasing device. The degreasing device includes liquid storage tank body and spray circulating pump;The inside of the liquid storage tank body is divided into liquid inlet chamber, sediment storage chamber and pump group room by partition. Among them, the liquid inlet chamber is located at the top of the liquid storage tank body, the bottom of the liquid inlet chamber is equipped with a plurality of through holes to be communicated with the sediment storage chamber, detachable filter basket is erected at each through hole place;The top of the liquid storage tank body is provided with the access cover of opening or closing the liquid inlet chamber. The sediment storage chamber and pump group room are arranged side by side, the sidewall of the pump group room has the openwork structure of communicating sediment storage chamber, and filter plate piece is connected at the openwork structure with plug-in installation. The equipment has remarkable effect in improving the reliability and maintenance convenience of degreasing spray system operation.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and in particular to a spray pretreatment device and a coating production line. Background Technology

[0002] Pre-treatment before coating is an essential process in the coating production line. Its main purpose is to remove oil, dust, and oxides from the workpiece surface through pretreatment operations such as degreasing, rust removal, and phosphating, thereby providing a good bonding foundation for subsequent coating processes. Among these, degreasing is one of the most common and critical steps. Currently, spraying is widely used, allowing the degreasing solution to continuously act on the workpiece surface. This method has advantages such as strong work continuity, high processing efficiency, suitability for large-scale operations, and stable treatment results.

[0003] However, during long-term use, impurities such as foreign particles will inevitably mix into the degreasing solution. If these are not removed in time, they may clog the spraying system, thereby affecting the stable operation of the entire coating production line. To address this, some improvements have been proposed in the prior art. For example, Chinese utility model patent CN211999928U discloses a degreasing device for pretreatment in a coating production line, which uses a grid to filter impurities in the degreasing solution, thereby improving the reliability of the equipment operation.

[0004] However, existing technologies employ a single, fixed grid filter structure, which is prone to clogging due to impurity buildup in practical use. The cleaning process is cumbersome and detrimental to maintenance and long-term stable operation. Therefore, there is still room for improvement in the impurity filtration capabilities of existing degreasing spray systems. Utility Model Content

[0005] To address the technical problems of existing technologies that employ a single fixed grid filter structure, which is prone to clogging due to impurity accumulation and involves a cumbersome cleaning process, this invention aims to provide a pretreatment device for spraying and a coating production line. This invention achieves the step-by-step removal of impurities from the degreasing solution through a graded filtration structure, effectively preventing nozzle clogging and ensuring the stable operation of the spraying system. It also employs detachable filter baskets and pluggable filter plates for easy cleaning and replacement.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] In a first aspect, this utility model provides a spray pretreatment device, including a spray chamber and a spray pipeline built into the spray chamber, the spray pretreatment device further including:

[0008] A degreasing device, comprising a liquid storage tank and a spray circulation pump, wherein the spray circulation pump is connected to the spray pipeline; the liquid storage tank is divided into an inlet chamber, a sedimentation storage chamber and a pump assembly chamber by a partition, and the spray circulation pump is connected to the pump assembly chamber.

[0009] The liquid inlet chamber is located at the top of the liquid storage tank. The bottom of the liquid inlet chamber has multiple through holes to connect with the sedimentation liquid storage chamber. A detachable filter basket is installed at each through hole. The top of the liquid storage tank is equipped with a maintenance cover for opening or closing the liquid inlet chamber.

[0010] The sedimentation storage chamber and the pump assembly chamber are arranged side by side. The side wall of the pump assembly chamber has a hollow structure that connects to the sedimentation storage chamber, and a pluggable filter plate is connected to the hollow structure.

[0011] In conjunction with the first aspect, this utility model also provides a first specific embodiment of the first aspect, wherein the filter plate includes a filter plate and a filter frame for mounting the filter plate, the middle part and the upper part of the filter plate are provided with a plurality of filter holes, and the lower part of the filter plate is not provided with filter holes.

[0012] In conjunction with the first aspect, this utility model also provides a second specific embodiment of the first aspect, wherein a slot is provided at the hollow structure of the pump assembly chamber, and the slot extends to the upper surface of the liquid storage tank; the filter plate can be inserted into the slot at the upper surface of the liquid storage tank, and can also be pulled out from the slot;

[0013] The filter plate has a baffle at the top of its frame, the width of which is greater than the width of the slot, and a handle at the top of the baffle.

[0014] In conjunction with the first aspect, this utility model also provides a third specific embodiment of the first aspect, wherein the filter basket is a box-shaped structure, and multiple filter holes are provided on the four sides and bottom of the filter basket;

[0015] The top of the filter basket is provided with a frame, the outer diameter of which is larger than the bottom through hole of the liquid inlet chamber; a handle is connected to the upper surface of the frame of the liquid inlet chamber.

[0016] In conjunction with the first aspect, this utility model also provides a fourth specific embodiment of the first aspect, wherein the filter basket and the filter plate are both made of stainless steel.

[0017] In conjunction with the first aspect, this utility model also provides a fifth specific embodiment of the first aspect, wherein the volume of the sedimentation storage chamber is larger than the volume of the pump assembly chamber, and the inlet chamber and the pump assembly chamber are staggered.

[0018] In conjunction with the first aspect, this utility model also provides a sixth specific embodiment of the first aspect, wherein the top of the liquid storage tank is provided with a liquid inlet pipe, and the liquid inlet pipe is connected to the return liquid tank at the bottom of the spray chamber.

[0019] In conjunction with the first aspect, this utility model also provides a seventh specific embodiment of the first aspect, wherein a liquid level gauge is also installed on the top of the liquid storage tank, and the liquid level gauge extends into the sedimentation storage chamber.

[0020] In conjunction with the first aspect, this utility model also provides an eighth specific embodiment of the first aspect, wherein the liquid storage tank is further provided with a steam coil, the steam coil is located in the sedimentation liquid storage chamber, and the inlet end and outlet end of the steam coil are both located at the top of the liquid storage tank.

[0021] Secondly, this utility model also provides a coating production line, including a spray pretreatment device as described in the first aspect and the first to eighth specific embodiments of the first aspect.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] This utility model provides a pretreatment device for spraying, including a spray chamber, a spray pipeline built into the spray chamber, and a degreasing device. The degreasing device includes a storage tank and a spray circulation pump, which is connected to the spray pipeline. The storage tank is divided into an inlet chamber, a sedimentation storage chamber, and a pump assembly chamber by a partition, and the spray circulation pump is connected to the pump assembly chamber. The inlet chamber is located at the top of the storage tank, and its bottom has multiple through holes to communicate with the sedimentation storage chamber. A detachable filter basket is installed at each through hole. The top of the storage tank is equipped with a maintenance cover for opening or closing the inlet chamber. The sedimentation storage chamber and the pump assembly chamber are arranged side by side. The side wall of the pump assembly chamber has a hollow structure communicating with the sedimentation storage chamber, and a pluggable filter plate is connected to this hollow structure.

[0024] This invention divides the interior of the liquid storage tank into an inlet chamber, a sedimentation storage chamber, and a pump chamber. A detachable filter basket is installed at the through-hole of the inlet chamber, allowing for preliminary interception of particulate impurities before the degreasing liquid enters the sedimentation storage chamber, preventing them from directly entering the spray circulation system. Simultaneously, the sedimentation storage chamber allows fine particles and suspended solids to settle naturally, effectively reducing impurity concentration and further improving the cleanliness of the degreasing liquid. A pluggable filter plate is also installed at the perforated connecting structure between the pump chamber and the sedimentation storage chamber, allowing for further filtration before entering the spray circulation pump, thus achieving a multi-stage filtration effect. This structure not only significantly reduces the probability of impurities entering the spray pipeline and the risk of nozzle clogging, ensuring the stability and continuity of the spray treatment process, but also, because the filter basket and filter plate are detachable and pluggable, facilitate regular cleaning or replacement by maintenance personnel. Therefore, this equipment has a significant effect on improving the operational reliability and maintenance convenience of the degreasing spray system. Attached Figure Description

[0025] Figure 1 This is a side view of the spray pretreatment equipment of this utility model;

[0026] Figure 2 This is a front view of the spray pretreatment equipment of this utility model;

[0027] Figure 3 This is a three-dimensional schematic diagram of the assembly of the spray pipeline and degreasing device of the spray pretreatment equipment of this utility model;

[0028] Figure 4 This is an assembly diagram of the degreasing device of the spray pretreatment equipment of this utility model;

[0029] Figure 5 This is a cross-sectional schematic diagram of the degreasing device of the spray pretreatment equipment of this utility model;

[0030] In the picture:

[0031] 10-Pre-treatment equipment for spraying;

[0032] 100-Spray room;

[0033] 200-Spray pipe;

[0034] 300-Degreasing device;

[0035] 310-Liquid storage tank, 311-Liquid inlet chamber, 312-Sedimentation storage chamber, 313-Pump assembly chamber, 314-Liquid inlet pipe;

[0036] 320-Filter Basket;

[0037] 330 - Filter plate, 331 - Filter plate, 332 - Filter frame, 333 - Handle;

[0038] 340-Spray circulation pump;

[0039] 350-Level Gauge;

[0040] 360-Steam Coil. Detailed Implementation

[0041] To facilitate understanding of this utility model, the technical solutions and advantages of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Any mechanisms or methods not elaborated in this utility model can be referred to in the prior art. The specific structures and features of this utility model are illustrated below by way of example and should not constitute any limitation on this utility model. Furthermore, any technical feature mentioned below (including implicit or disclosed features), as well as any technical feature directly shown or implied in the figures, can be arbitrarily combined or deleted among these technical features to form more other embodiments that may not be directly or indirectly mentioned in this utility model. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0042] like Figures 1-5 As shown in the figure, this embodiment presents a preferred structure of a spray pretreatment device.

[0043] like Figure 1 As shown, the spray pretreatment equipment 10 described in this embodiment includes a spray chamber 100, a spray pipeline 200 built into the spray chamber, and a degreasing device 300. It can be understood that this utility model's spray pretreatment equipment, through the combination of the spray chamber, spray pipeline, and degreasing device, forms a cleaning system of circulating spraying and filtration oil removal, achieving efficient degreasing of the workpiece surface, liquid recycling, and safe and reliable equipment operation, providing a clean and uniform workpiece surface for subsequent coating processes.

[0044] In this field, both the spray chamber and the spray piping utilize existing technology. For example, the spray chamber is an enclosed space accommodating the workpiece to be treated, and its inner wall material is made of corrosion-resistant metal or high-temperature-resistant plastic, capable of withstanding the long-term effects of degreasing liquid and cleaning chemicals. A return tank is provided at the bottom of the spray chamber to collect the degreasing liquid after spraying and return it to the storage tank of the degreasing device. For example, an inlet pipe 314 is provided at the top of the storage tank, and the inlet pipe connects to the return tank at the bottom of the spray chamber.

[0045] Specifically, the inlet pipe is a square tube with a baffle at the bottom. The baffle has a square outer contour, and the inlet pipe can be directly covered on the top of the liquid storage tank through the baffle, which is convenient for installation.

[0046] In some specific implementations, the top of the spray chamber is equipped with a transport track, and the workpieces are transported one by one by hoisting through the spray pipes to achieve the purpose of degreasing by spraying degreasing liquid.

[0047] For example, the spray pipeline is installed inside the spray chamber and includes several spray nozzles. The nozzles are evenly distributed above and around the workpiece to evenly spray the degreasing solution onto the workpiece surface for comprehensive cleaning. The spray pipeline is connected to the spray circulation pump of the degreasing device. The degreasing solution is drawn from the pump chamber of the degreasing device by the spray circulation pump and then sprayed back onto the workpiece surface through the nozzles.

[0048] like Figures 3-5 As shown, the degreasing device includes a liquid storage tank 310 and a spray circulation pump 340. The spray circulation pump 340 is connected to the spray pipeline 200. The liquid storage tank 310 is divided into an inlet chamber 311, a sedimentation storage chamber 312 and a pump assembly chamber 313 by a partition. The spray circulation pump 340 is connected to the pump assembly chamber 313.

[0049] The liquid inlet chamber 311 is located at the top of the liquid storage tank 310. The bottom of the liquid inlet chamber 311 has multiple through holes to connect with the sedimentation storage chamber 312. A detachable filter basket 320 is installed at each through hole. The top of the liquid storage tank is equipped with a maintenance cover for opening or closing the liquid inlet chamber. The sedimentation storage chamber 312 and the pump assembly chamber 313 are arranged side-by-side. The side wall of the pump assembly chamber 313 has a perforated structure connecting to the sedimentation storage chamber, and a pluggable filter plate 330 is connected to this perforated structure.

[0050] In some embodiments, the storage tank has a double-layered hollow structure, including an inner wall, an outer wall, and a supporting structure. The inner wall is in direct contact with the degreasing liquid and is made of corrosion-resistant stainless steel. The outer wall covers the inner wall, forming a hollow cavity between them. The supporting structure consists of square tubular reinforcing ribs between the inner and outer walls to maintain the shape stability of the hollow cavity and prevent deformation of the walls due to liquid pressure or external forces. Support feet are provided at the bottom of the outer wall.

[0051] In this application, the inlet chamber is located at the top of the storage tank and is used to collect the degreasing liquid returning from the spray chamber. The bottom of the inlet chamber has multiple through holes that communicate with the sedimentation storage chamber below. A detachable filter basket 320 is installed at each through hole to initially trap suspended impurities and particles, preventing them from entering the sedimentation storage chamber and thus protecting the normal operation of the pump and spray pipeline. The top of the storage tank has an inspection cover that can be used to open or close the inlet chamber to remove and place the filter basket for cleaning and other operations, facilitating daily cleaning and maintenance.

[0052] In this application, the sedimentation storage chamber is located in the middle of the storage tank and is used for sedimentation of impurities in the liquid, allowing heavier particles to settle to the bottom of the chamber, further purifying the circulating liquid. The sedimentation storage chamber is arranged side by side with the pump assembly chamber and is connected to the pump assembly chamber through a perforated structure on the side wall of the pump assembly chamber. A pluggable filter plate is installed in the perforated structure to further filter suspended particles in the liquid, prevent impurities from entering the spray circulation pump, and improve the service life of the spray circulation pump and the spray pretreatment equipment.

[0053] In this application, the pump unit chamber and the sedimentation storage chamber are arranged side by side. The pump unit chamber is equipped with a spray circulation pump, and the motor of the spray circulation pump is installed on the top of the storage tank and connected to the pump unit. The pump unit chamber is connected to the sedimentation storage chamber through a perforated structure on the side wall, allowing the degreasing solution purified by the sedimentation storage chamber to enter the pump unit chamber and then be transported to the spray pipeline by the spray circulation pump to achieve spray circulation cleaning of the workpiece surface.

[0054] The liquid storage tank is divided into an inlet chamber, a sedimentation storage chamber, and a pump chamber, so that the return liquid passes through primary interception (filter basket), sedimentation purification (sedimentation storage chamber), and secondary filtration (plug-in filter plates) in sequence, forming multi-stage purification to greatly ensure the cleanliness of the spray liquid.

[0055] In some specific implementations, the filter plate 330 includes a filter plate 331 and a filter frame 332 for mounting the filter plate 331. The middle and upper parts of the filter plate 331 are provided with multiple filter holes, while the lower part of the filter plate 330 is not provided with filter holes.

[0056] Understandably, filter plate 331 has a plate-like structure with multiple filter holes in its middle and upper parts to trap suspended particles and impurities in the liquid as it flows through. The lower part of the filter plate has no filter holes, preventing impurities settling at the bottom of the sedimentation chamber from entering the pump chamber through the filter plate, thus further protecting the circulating pump and spray pipes from particle blockage or wear. The filter plate is fixedly installed via a filter frame for better fixation at the perforated connection between the pump chamber and the sedimentation chamber. The filter frame's structure facilitates insertion, removal, and disassembly, simplifying daily maintenance and replacement, and improving the equipment's operability.

[0057] In some specific implementations, a slot is provided in the hollow structure of the pump unit chamber, which extends to the upper surface of the liquid storage tank; the filter plate can be inserted into the slot through the upper surface of the liquid storage tank, and can also be pulled out of the slot. A baffle is provided at the top of the frame of the filter plate, the width of which is greater than the width of the slot, and a handle 333 is provided at the top of the baffle.

[0058] Understandably, the slot opening is located on the upper surface of the liquid storage tank so that the filter plate can be inserted into the slot on the upper surface of the liquid storage tank. The baffle serves two purposes: firstly, it provides a mounting structure for the handle, and secondly, it covers the slot opening to prevent external impurities from entering the interior of the liquid storage tank.

[0059] In practical implementation, the filter basket 320 is a box-shaped structure, with multiple filter holes on all four side walls and the bottom. The top of the filter basket is equipped with a frame, the outer diameter of which is larger than the bottom through hole of the liquid inlet chamber; a handle is connected to the upper surface of the frame of the liquid inlet chamber.

[0060] In this application, the filter basket 320 has filter holes on its side walls and bottom to form a primary filter layer, which can effectively intercept particles or impurities in the liquid, ensuring that the degreasing liquid entering the sedimentation storage chamber is relatively clean, thereby protecting the pump unit and spray pipeline. The filter basket has filter holes on its side walls to allow for better passage of the degreasing liquid.

[0061] Understandably, the filter basket 320 has a frame at the top, with an outer diameter larger than the diameter of the through hole at the bottom of the inlet chamber. This allows the filter basket to be stably placed on the through hole and prevents it from shifting during liquid flow. A handle is provided on the upper surface of the inlet chamber frame. Combined with the frame structure of the filter basket, operators can easily lift or insert the filter basket into the through hole using the handle, enabling quick assembly, disassembly, and cleaning.

[0062] In some preferred embodiments, both the filter basket 320 and the filter plate 330 are made of stainless steel. Stainless steel has excellent corrosion resistance, high temperature resistance, and mechanical strength, and can resist the corrosion of degreasing liquid and chemical components in the spray liquid for a long time, preventing the filter elements from deforming or being damaged. By using stainless steel, the filter basket and filter plate of this invention can operate reliably for a long time, improving the overall reliability and durability of the spray pretreatment equipment.

[0063] In some preferred embodiments, the volume of the sedimentation storage chamber is larger than that of the pump assembly chamber, and the inlet chamber and pump assembly chamber are staggered. The larger volume of the sedimentation storage chamber increases the residence time of the degreasing solution within it, thereby improving the sedimentation efficiency of suspended impurities and settled particles in the liquid. Simultaneously, the staggered distribution of the inlet chamber and pump assembly chamber prevents the degreasing solution from flowing rapidly from the inlet chamber into the pump assembly chamber, thus enhancing sedimentation and filtration effects.

[0064] In some preferred embodiments, a level gauge 350 is also installed on the top of the storage tank, extending into the sedimentation storage chamber. In this application, the level gauge is used to monitor the liquid level of the degreasing liquid in the storage tank in real time. The level gauge probe senses the liquid level in the sedimentation storage chamber in real time and outputs a liquid level signal to achieve visual monitoring or automatic control of the liquid level. When the degreasing liquid level is lower than the safe value, the level gauge can trigger the spray circulation pump to stop running to prevent the pump from running dry; when the liquid level is too high, an alarm can be issued to prevent liquid overflow and ensure the safe operation of the equipment.

[0065] In some specific implementations, the level gauge 350 can be a float level gauge.

[0066] In some preferred embodiments, the liquid storage tank is also equipped with a steam coil 360, which is located in the sedimentation liquid storage chamber, with both the inlet and outlet ends of the steam coil located at the top of the liquid storage tank.

[0067] In this embodiment, the steam coil 360 is arranged in a coil or spiral shape in the sedimentation storage chamber, with both its inlet and outlet ends located at the top of the storage tank, facilitating the connection of the steam pipeline and the liquid circulation heating operation. For example, the steam coil is arranged in a coil shape in the sedimentation storage chamber, with the steam coil attached to the side wall of the sedimentation storage chamber.

[0068] This utility model also provides a coating production line, including the aforementioned pre-treatment equipment. The coating production line may include a workpiece conveying system, a pre-treatment equipment, a drying / curing zone, and a spraying zone, wherein the pre-treatment equipment is installed before the workpiece enters the spraying zone and is used to degrease, clean, and pre-treat the workpiece surface.

[0069] The above embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. For those skilled in the art, it will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spray pre-treatment apparatus comprising a spray chamber and a spray line built into the spray chamber, characterized in that, The pretreatment equipment for spraying also includes: A degreasing device, comprising a liquid storage tank and a spray circulation pump, wherein the spray circulation pump is connected to the spray pipeline; the liquid storage tank is divided into an inlet chamber, a sedimentation storage chamber and a pump assembly chamber by a partition, and the spray circulation pump is connected to the pump assembly chamber. The liquid inlet chamber is located at the top of the liquid storage tank. The bottom of the liquid inlet chamber has multiple through holes to connect with the sedimentation liquid storage chamber. A detachable filter basket is installed at each through hole. The top of the liquid storage tank is equipped with a maintenance cover for opening or closing the liquid inlet chamber. The sedimentation storage chamber and the pump assembly chamber are arranged side by side. The side wall of the pump assembly chamber has a hollow structure that connects to the sedimentation storage chamber, and a pluggable filter plate is connected to the hollow structure.

2. The spray pretreatment equipment as described in claim 1, characterized in that: The filter plate includes a filter plate and a filter frame for mounting the filter plate. The middle and upper parts of the filter plate are provided with multiple filter holes, while the lower part of the filter plate is not provided with filter holes.

3. The spray pretreatment equipment as described in claim 2, characterized in that: The pump chamber has a slot in its openwork structure, which extends to the upper surface of the liquid storage tank; the filter plate can be inserted into the slot through the upper surface of the liquid storage tank, and can also be pulled out of the slot. The filter plate has a baffle at the top of its frame, the width of which is greater than the width of the slot, and a handle at the top of the baffle.

4. The spray pretreatment equipment as described in claim 1, characterized in that: The filter basket is a boxed structure, and multiple filter holes are provided on all four sides and the bottom of the filter basket; The top of the filter basket is provided with a frame, the outer diameter of which is larger than the bottom through hole of the liquid inlet chamber; a handle is connected to the upper surface of the frame of the liquid inlet chamber.

5. The spray pretreatment equipment as described in claim 1, characterized in that: Both the filter basket and the filter plates are made of stainless steel.

6. The spray pretreatment equipment as described in claim 1, characterized in that: The volume of the sedimentation storage chamber is larger than that of the pump assembly chamber, and the inlet chamber and the pump assembly chamber are staggered.

7. The spray pretreatment equipment as described in claim 1, characterized in that: The top of the liquid storage tank is equipped with a liquid inlet pipe, which is connected to the return liquid tank at the bottom of the spray chamber.

8. The spray pretreatment equipment as described in claim 1, characterized in that: A level gauge is also installed on the top of the liquid storage tank, and the level gauge extends into the sedimentation storage chamber.

9. The spray pretreatment equipment as described in claim 1, characterized in that: The liquid storage tank is also equipped with a steam coil, which is located in the sedimentation liquid storage chamber. The inlet and outlet ends of the steam coil are both located at the top of the liquid storage tank.

10. A painting line, characterized in that, Includes a spray pretreatment device as described in any one of claims 1 to 9.

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