A surface treatment device for a fuel filter housing

Abstract

The utility model relates to a kind of surface treatment devices for fuel filter shell, including providing the base of lifting assembly plane, the box shell capable of defining surface treatment chamber is suspended and supported by support column on the base, and the parallel conveyer belt capable of driving column shell workpiece to pass in surface treatment chamber is laterally provided in the box shell, and spraying mechanism is arranged on the alignment side wall surface of the box shell at the both sides of the parallel conveyer belt;Rotary clamping seat capable of self-adaptively supporting and limiting column shell workpiece is also spaced on the parallel conveyer belt, wherein, the rotary clamping seat is engaged with the rack on the inner side wall of the box shell according to the synchronous rotation around axis of its can occur in the process of directional translation following the parallel conveyer belt.The utility model can realize uniform and sufficient high-quality spraying while carrying out continuous batch spraying processing.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel filter housing processing equipment, and in particular to a surface treatment device for fuel filter housing. Background Technology

[0002] A fuel filter is a filter that removes particulate matter, moisture, and other contaminants from fuel, improving the quality of the fuel delivered to a car engine. It mainly consists of a housing, filter element, cover plate, and sealing rings. It purifies the incoming fuel, ensuring stable engine operation, reducing engine wear and extending engine life, and also reducing exhaust emissions to some extent. The filter housing, also known as the filter casing, is the part of the filter that houses the filter element or filter assembly. It is typically required to withstand a certain amount of pressure without deformation or damage to maintain the normal operation of the filter element.

[0003] In the filter manufacturing process, to improve its performance and surface finish, the filter housing is typically coated. Traditional coating methods involve manual operation, resulting in low efficiency, poor uniformity, and subpar quality. Furthermore, the paint molecules in the air can harm operator health and pollute the environment. Some existing filter housing coating fixtures typically have only a single coating station, requiring intermittent coating and clamping / unclamping operations, leading to overall low processing efficiency. Other existing fixtures, while designed with continuous coating mechanisms, lack the limiting structure to constantly adjust the real-time coating area of ​​the filter housing during continuous transport. This results in frequent missed or overflow coatings, causing uneven or insufficient coating and affecting overall quality. Utility Model Content

[0004] The purpose of this invention is to provide a surface treatment device for fuel filter housings that can achieve continuous spraying by separating the clamping station and the spraying station, while simultaneously providing stable and suitable port shielding clamping and continuous rotation drive to achieve uniform and sufficient high-quality full-surface spraying of the filter housing. This device solves the problems of low efficiency and inability to efficiently perform large-volume spraying in existing manual spraying or single-station spraying methods, as well as the inability of existing continuous spraying equipment to stably shield and clamp the filter housing, which easily leads to problems such as missed spraying or overflow spraying, resulting in uneven or insufficient spraying.

[0005] The technical solution adopted by this utility model is as follows: a surface treatment device for a fuel filter housing, including a base that provides a raised assembly plane, a housing that defines a surface treatment chamber is suspended on the base by a support column, and a parallel conveyor belt that can drive the cylindrical housing workpiece to move through the surface treatment chamber is transversely arranged in the housing. A spraying mechanism is provided on the aligning sidewalls of the housing on both sides of the parallel conveyor belt. Rotary clamping seats that can adaptively support and limit the cylindrical housing workpiece are also arranged at intervals on the parallel conveyor belt. The rotary clamping seats are engaged with the rack on the inner sidewall of the housing in a manner that allows them to rotate synchronously around an axis during the directional translation with the parallel conveyor belt.

[0006] According to a preferred embodiment, the rotary clamping seat includes a support base, an insert sleeve, a bearing component, a shielding cover, a sealing support frustum, an annular airbag, and a traction limiting component. The insert sleeve is inserted through the center of the surface of the support base, and its axial upper end is rotatably connected to the shielding cover via a bearing component. A sealing support frustum is also connected to the shielding cover. An annular airbag is also disposed on the sealing support frustum, and a traction limiting component is inserted within the annular airbag.

[0007] According to a preferred embodiment, the traction limiting member includes a square lifting shaft that is movably inserted into the rotating sleeve, an annular pressure plate disposed on the upper axial end of the square lifting shaft and pressing against the top surface of the annular airbag, and a magnetic metal pull plate disposed on the lower axial end of the square lifting shaft; a rotating gear capable of meshing with a rack is fitted on the cylinder of the rotating sleeve located below the parallel conveyor belt.

[0008] According to a preferred embodiment, through openings are provided on both sides of the housing for the parallel conveyor belt, the rotary clamping seat and the cylindrical workpiece to enter and exit, and a blower mechanism capable of forming an air curtain barrier is provided on the upper side of the through openings.

[0009] According to a preferred embodiment, the blower mechanism includes a cavity air outlet strip and a blower unit connected to the cavity air outlet strip via an air supply flat tube that penetrates the side wall of the housing.

[0010] According to a preferred embodiment, an auxiliary support mechanism is provided on the inner sidewalls of the housing located on both sides of the parallel conveyor belt, which can provide auxiliary support for the parallel conveyor belt; a rack connected to the inner sidewall of the housing via a first transverse connecting rod is also provided below the auxiliary support mechanism; a second transverse connecting rod is also provided below the first transverse connecting rod, and the two sets of aligned second transverse connecting rods suspend the magnetic limiting plate below the parallel conveyor belt.

[0011] According to a preferred embodiment, the auxiliary support mechanism includes a triangular support frame and a strip support plate fixed to the triangular support frame by welding.

[0012] According to a preferred embodiment, the spraying mechanism includes two bent cavity vertical plates arranged on both sides of the parallel conveyor belt and connected to the inner wall of the housing, a storage box placed on the top of the housing, a conveying pipe connecting the bent cavity vertical plates and the storage box, and coating nozzles arranged in an array on the surface of the bent cavity vertical plates.

[0013] The beneficial effects of this utility model are:

[0014] The rotating clamping seat provided in this application can continuously translate and rotate under the joint constraints of the parallel conveyor belt and the housing, thereby improving the uniformity and full coverage of the surface spraying process. Furthermore, the continuous spraying process separates the assembly / disassembly station from the spraying station, isolating operators from the spraying space and preventing them from being harmed by paint molecules. It also improves the efficiency of processing large batches of filter housings. The sealing support frustum provided in this application can adaptively seal the open end of the filter housing placed upside down on top of it, effectively supporting filter housings with slight dimensional errors or of different specifications and models, preventing accidental spraying inside the housing cavity, and expanding the applicability of the installation. Furthermore, the traction limiting component provided in this application can cause the annular airbag to flatten and expand under the magnetic pull, allowing it to be internally supported and abutted against the inner wall of the filter housing. This improves the stability of the filter housing when it is upside down, and prevents the filter housing from tilting or falling off during the impact and rotation of the sprayed paint airflow. This ensures the stability of the opening sealing and the uniformity of the rotating spray, effectively improving the quality of continuous spraying.

[0015] The rotatable sleeve of the tension limiting component provided in this application meshes with the rack through a rotating gear, so that the filter housing rotates around the axis along with the sealing support truncated cone, thereby continuously changing the surface area of ​​the filter housing facing the coating nozzle, so that its surface can be uniformly coated with a coating, reducing the risk of local missed spraying or overflow spraying, and improving the uniformity and quality of coating spraying. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred surface treatment device for a fuel filter housing proposed in this utility model;

[0017] Figure 2 This is a side plan view of the location of the triangular support frame of a preferred surface treatment device for a fuel filter housing proposed in this utility model;

[0018] Figure 3 This is a side plan view of the location of the second transverse connecting rod of a preferred surface treatment device for a fuel filter housing proposed in this utility model;

[0019] Figure 4 This is a side plan view of the location of the first transverse connecting rod of a preferred surface treatment device for a fuel filter housing proposed in this utility model;

[0020] Figure 5 This is a side plan view of the location of the vertical plate of the bent cavity in a preferred surface treatment device for a fuel filter housing proposed in this utility model. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This application provides a surface treatment device for a fuel filter housing, which includes a base 1, a support column 2, a housing 3, a parallel conveyor belt 4, a spraying mechanism 5, and a rotating clamping seat 6.

[0026] according to Figure 1-5In one specific embodiment, the base 1 provides a raised assembly plane, allowing the height of the housing 3 to match that of the parallel conveyor belt 4. The housing 3, defining a surface treatment chamber, is suspended on the base 1 by support columns 2. A parallel conveyor belt 4, capable of moving cylindrical workpieces within the surface treatment chamber, is transversely inserted within the housing 3. Spraying mechanisms 5 are installed on the aligning sidewalls of the housing 3 on either side of the parallel conveyor belt 4. Rotary clamping seats 6, capable of adaptively supporting and limiting the internal movement of cylindrical workpieces, are also spaced along the parallel conveyor belt 4. The rotating clamping seat 6 engages with the rack 35 on the inner wall of the housing 3 in a way that allows it to rotate synchronously around its axis during the directional translation of the parallel conveyor belt 4. This enables the cylindrical shell workpiece it clamps to rotate around its axis, improving the uniformity and full coverage of the surface spraying process. Furthermore, the continuous spraying process can separate the disassembly and assembly station from the spraying station, keeping the operators away from the spraying space, preventing them from being harmed by paint molecules, and improving the efficiency of processing large batches of filter housings.

[0027] Preferably, the bottom of the base 1 can be equipped with casters or other roller structures as needed, which facilitates the change of equipment position according to requirements and improves the convenience of equipment repositioning.

[0028] Preferably, the support column 2 can be a column structure with a fixed length, and its upper and lower axial ends are both securely connected to the base 1 and the housing 3 respectively by flanges with insert screws. Alternatively, the secure connection between the support column 2 and the base 1 and the housing 3 can be achieved by welding. More preferably, the support column 2 can also be a hydraulic lifting rod capable of changing its support height. For example, it can be a TPR-300 type high-thrust, liftable electro-hydraulic support column in the prior art, so that the actual height of the housing 3 can be adjusted according to requirements to ensure relative height adaptation with the parallel conveyor belt 4.

[0029] Preferably, through openings 31 are provided on both sides of the housing 3 for the parallel conveyor belt 4, the rotating clamping seat 6, and the cylindrical workpiece to enter and exit. Preferably, a blower mechanism 32 capable of forming an air curtain barrier to suppress the outward diffusion of paint particles is also provided on the upper side of the through openings 31. An auxiliary support mechanism 33 is provided on the inner sidewalls of the housing 3 on both sides of the parallel conveyor belt 4 to provide auxiliary support for the parallel conveyor belt 4, limit the height of the conveying plane constructed by the parallel conveyor belt 4, and improve its planar stability. Preferably, a rack 35 connected to the inner sidewall of the housing 3 via a first transverse connecting rod 34 is also provided below the auxiliary support mechanism 33. Preferably, a second transverse connecting rod 36 is also provided below the first transverse connecting rod 34. More preferably, the two sets of aligned second transverse connecting rods 36 suspend the magnetic limiting plate 37 below the parallel conveyor belt 4. Preferably, the rack 35 has teeth with progressively increasing tooth height on its end bar near the input end of the parallel conveyor belt 4, so that the rotating gear 675 of the rotating clamping seat 6, which moves with the parallel conveyor belt 4, can gradually mesh with the rack 35 during the lateral movement, thus avoiding tooth contact conflict in the initial meshing stage. Preferably, the magnetic suction limiting plate 37 includes an electromagnetic suction plate and a shielding and guiding cover fastened above the electromagnetic suction plate. Preferably, the electromagnetic suction plate is connected to an external power supply via a wire attached to the lower surface of the second transverse connecting rod. Specifically, the electromagnetic suction plate can be an OER / 581 / KD type plate electromagnet, which can generate different strengths of magnetic attraction force when the current is changed and energized, as needed. This application pre-sets its working power in the assembly, so that it provides a specific magnitude of magnetic attraction force when energized in a closed loop. For example, when it is connected in parallel with other electrical modules of the equipment in a 220V power supply circuit, it provides a fixed magnetic traction force of 20N. A collection tank 38 for collecting spraying waste liquid is provided on the inner bottom surface of the housing 3. A drain pipe with a switch valve is also provided at the bottom of the collection tank 38 to facilitate the periodic discharge of waste liquid. A spraying exhaust gas extraction pipe 39 with an exhaust fan is also provided on the top side of the housing 3. The output end of the spraying exhaust gas extraction pipe 39 is connected to an external spraying exhaust gas treatment device to continuously transfer the spraying exhaust gas and perform environmentally friendly treatment, thereby reducing pollution and harm from spraying.

[0030] Preferably, the blower mechanism 32 includes a cavity outlet strip 321 with a strip-shaped exhaust port that outputs airflow from top to bottom and forms an air curtain, and a blowing unit 323 connected to the cavity outlet strip 321 via an air delivery flat pipe 322 that penetrates the side wall of the housing 3. Preferably, the air delivery flat pipe 322 has a large-sized tube body with a rectangular cross-section adapted to the width of the cavity outlet strip 321. Preferably, the blowing unit 323 is an OFE / 360-S type blower with an airflow traction roller that outputs a rectangular planar airflow, which can form a dynamic barrier by outputting high-speed airflow (e.g., 15 m / s or higher) to block the intrusion of external pollutants and the escape of internal particles.

[0031] Preferably, the auxiliary support mechanism 33 includes a triangular support frame 331 installed on the inner wall of the housing 3 by welding or bolting, and a strip support plate 332 fixed to the triangular support frame 331 by welding. Preferably, the end of the strip support plate 332 near the input side of the parallel conveyor belt 4 is provided with a downwardly inclined arc plate body, which facilitates the guidance of the translating parallel conveyor belt 4 and avoids the parallel conveyor belt 4 from contacting the edge of the plate body of the strip support plate 332 and causing scratches.

[0032] Preferably, the parallel conveyor belt 4 is a conveyor line with two spaced belts that move in parallel and synchronously, such as the SW-ac series double-row narrow synchronous belt conveyor. Furthermore, the transmission rollers driving the parallel conveyor belt 4 are also arranged in parallel with gaps in between, thereby effectively accommodating the rotating clamping seats 6 located between the parallel conveyor belts 4.

[0033] Preferably, the spraying mechanism 5 includes two bent cavity vertical plates 51 aligned on both sides of the parallel conveyor belt 4 and connected to the inner wall of the housing 3, a storage tank 52 mounted on the top of the housing 3, a conveying pipe 53 connecting the bent cavity vertical plates 51 and the storage tank 52 and penetrating the housing 3, and coating nozzles 54 arrayed on the surface of the bent cavity vertical plates 51. Preferably, the output port of the storage tank 52 is connected to the conveying pipe 53 via a pressurized liquid pump, so that when the pressurized liquid pump is manually powered on, the paint liquid can be pressurized and conveyed, thereby being sprayed out under high pressure from the coating nozzles 54 and effectively adhering to the surface of the cylindrical workpiece. Preferably, the conveying pipe 53 has branch pipes, thereby simultaneously supplying spraying material to the two aligned bent cavity vertical plates 51. Preferably, the pressurized liquid pump is a UMP-504BN type slurry pressurized conveying pump with adjustable flow rate and no pulsation problem. Preferably, the bent cavity vertical plate 51 is connected to the inner wall of the housing 3 via an array of connecting horizontal columns. Specifically, the two ends of the connecting horizontal columns are assembled and connected to the bent cavity vertical plate 51 and the housing 3 by welding or bolting. The bent cavity vertical plate 51 provided in this application can effectively adapt to the shape of the J-series and S-series fuel filter housings produced by the applicant, that is, the shape of the housing composed of a column and a frustum. Furthermore, the top of the fuel filter housing needs to be punched later and cannot be painted. Therefore, the painting area is mainly the vertical sidewall and inclined side of the filter housing. The bent cavity vertical plate 51 provided in this application can ensure that the distance between several painting nozzles 54 and the filter housing remains approximately equal, thereby ensuring that the intensity of the paint sprayed in each area is consistent, so as to obtain a coating with uniform thickness.

[0034] Preferably, the rotating clamping seat 6 includes a support base 61, an insert sleeve 62, a bearing 63, a shielding cover 64, a sealing support frustum 65, an annular airbag 66, and a traction limiting member 67. Preferably, the insert sleeve 62 is inserted through the center of the surface of the support base 61, which is spaced apart on the parallel conveyor belt 4, by means of interference fit or welding. More preferably, the upper axial end of the insert sleeve 62 is rotatably connected to the shielding cover 64 via the bearing 63. Preferably, the sealing support frustum 65 is also integrally connected to the shielding cover 64 by welding. Preferably, the annular airbag 66 is also disposed on the sealing support frustum 65. More preferably, a traction limiting member 67 is inserted through the annular airbag 66, which can penetrate the sealing support frustum 65 and the insert sleeve 62 and extend below the parallel conveyor belt 4, and can define the shape of the annular airbag 66. The sealing support frustum 65 provided in this application can adaptively seal the opening end of the filter housing placed upside down on top of it, effectively supporting the opening sealing of filter housings with slight dimensional errors or various specifications and models, thereby preventing accidental spraying inside the housing cavity and improving the applicability of the placement. Furthermore, the traction limiting member 67 provided in this application can cause the annular airbag 66 to flatten and expand under magnetic pull, allowing it to internally support and abut against the inner wall of the filter housing, thereby improving the stability of the upside-down placement of the filter housing and preventing problems such as tilting or falling off the filter housing during the impact and rotation of the sprayed paint airflow. This ensures the stability of the opening sealing and the uniformity of the rotary spraying, effectively improving the quality of continuous spraying.

[0035] Preferably, the support pedestal 61 has a rectangular base plate connected to the two conveyor belts that form the parallel conveyor belt 4, a frustum-shaped ramp intermediate body, and an upper cylindrical body. More preferably, the bottom of the support pedestal 61 is connected to the parallel conveyor belt 4 via a middle connecting strip 611, and movable support plates 612 are also provided on both sides of the middle connecting strip 611 on the bottom surface of the support pedestal 61. Specifically, the middle connecting strip 611 is connected to the parallel conveyor belt 4 via screws or other connectors, and the movable support plates 612 are movably supported on the parallel conveyor belt 4 at the same height as the middle connecting strip 611.

[0036] Preferably, the bearing component 63 can be a sealed bearing, which is a bearing in which a metal dust cover or a rubber ring with a skeleton is embedded in the groove of the bearing ring, usually the outer ring, and there is a small gap or contact between it and another ring, usually the inner ring, to form a closed structure, thereby forming a double-sided sealed bearing. This not only preserves the grease, but also prevents foreign objects such as dust from entering the bearing, keeping the rolling elements rotating in a clean environment.

[0037] Preferably, a silicone sealing gasket is embedded on the sloping annular surface of the sealing support frustum 65 to fill the assembly gap of the cylindrical shell workpiece fastened to the sealing support frustum 65. Preferably, a through hole for the pull-limiting member 67 to pass through is also provided on the central axis of the sealing support frustum 65. More preferably, the inner wall of the through hole of the sealing support frustum 65 is fitted and connected to the outer wall of the rotating sleeve 671 without gap, and the stability of the sleeve connection is ensured by interference fit or welding. A sealing ring is embedded on the inner wall of the insert sleeve 62 to fill the assembly gap between it and the rotating sleeve 671, thereby preventing the intrusion and damage of paint molecules.

[0038] Preferably, the traction limiting member 67 includes a rotating sleeve 671 with a cross-sectional profile of an outer circle and an inner square, a square lifting shaft 672 adapted to the inner cavity cross-section of the rotating sleeve 671 and movably inserted in the rotating sleeve 671, an annular pressure plate 673 disposed at the axial upper end of the square lifting shaft 672 and pressing against the top surface of the annular airbag 66, and a magnetic metal pull plate 674 disposed at the axial lower end of the square lifting shaft 672. Preferably, the rotating sleeve 671 and the square lifting shaft 672 are fitted together to achieve rotational linkage between the two, and a sealing gasket is provided between them to prevent the leakage of paint molecules from entering the assembly gap and causing a decrease in the relative lifting smoothness of the square lifting shaft 672. Preferably, a rotating gear 675 is fitted onto the cylinder below the parallel conveyor belt 4 of the rotating sleeve 671 by welding or other means, which can mesh with the rack 35 to make the sealing support frustum 65 and the cylindrical shell workpiece rotate synchronously during translation. Specifically, the magnetic metal pull plate 674 can move downward under the magnetic attraction of the magnetic limiting plate 37, causing the annular pressure plate 673 to press down on the annular airbag 66. This increases the axial cross-section of the annular airbag 66, effectively supporting it against the inner wall of the cylindrical shell workpiece and ensuring the clamping stability of the cylindrical shell workpiece during rotation. Preferably, the length of the rack 35 is shorter than the electromagnetic suction plate of the magnetic limiting plate 37, so that the rotating clamping seat 6 can drive the filter shell to rotate around the axis only after the filter shell is internally supported and limited to improve the placement stability. The rotatable rotating sleeve 671 of the traction limiting member 67 provided in this application meshes with the rack 35 through the rotating gear 675, so that the filter shell rotates around the axis along with the sealing support frustum 65, continuously changing the surface area of ​​the filter shell facing the coating nozzle 54, so that its surface can be uniformly coated with a coating, reducing the risk of local missed spraying or overflow spraying, and improving the uniformity and quality of coating spraying.

[0039] A track-type high-temperature curing oven, connected to its chamber, is also installed on the output side of the casing 3. This allows the columnar shell workpieces, after spraying, to enter the track-type high-temperature curing oven via the parallel conveyor belt 4, thus achieving the drying and curing of the paint layer. Preferably, the track-type high-temperature curing oven directly adopts the existing YKSC-350 spray drying line, which has a dual-duct hot air circulation system with a temperature uniformity error ≤ ±2℃. It is equipped with a control panel, allowing manual adjustment of the working temperature as needed, with a maximum temperature of 350℃. During use, operators adjust the temperature in the drying process multiple times through pre-testing to select a suitable temperature for batch drying of workpieces. In other words, the temperature setting is not a single fixed value; operators can adjust the drying temperature within a certain range according to actual conditions to ensure the drying effect.

[0040] Preferably, the electromagnetic suction plate of the magnetic suction limiting plate 37, the air blowing unit 323, the electric drive hydraulic support column, the pressurizing liquid pump, and the track-type high-temperature curing oven involved in this application are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0041] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0042] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A surface treatment apparatus for a fuel filter housing, comprising a base (1) providing a raised mounting surface, characterized in that, A housing (3) that defines a surface treatment chamber is suspended on the base (1) by a support column (2), and a parallel conveyor belt (4) that can drive the cylindrical workpiece to move through the surface treatment chamber is transversely installed inside the housing (3). A spraying mechanism (5) is provided on the aligning side wall of the housing (3) on both sides of the parallel conveyor belt (4); Rotary clamping seats (6) capable of adaptively supporting and limiting the cylindrical shell workpiece are also arranged at intervals on the parallel conveyor belt (4). The rotary clamping seats (6) are engaged with the rack (35) on the inner side wall of the box shell (3) in such a way that they can rotate synchronously around the axis during the directional translation of the parallel conveyor belt (4).

2. The surface treatment apparatus for a fuel filter housing as described in claim 1, characterized in that, The rotating clamping seat (6) includes a support base (61), an insert sleeve (62), a bearing component (63), a shielding cover (64), a sealing support frustum (65), an annular airbag (66), and a traction limiting component (67), wherein, The support base (61) has an insert sleeve (62) inserted through its center surface, and the insert sleeve (62) is rotatably connected to the shielding cover (64) via a bearing (63) at its upper axial end. A sealing support truncated cone (65) is also connected to the shielding cover (64). An annular airbag (66) is also installed on the sealing support truncated cone (65), and a traction limiting member (67) is inserted inside the annular airbag (66).

3. The surface treatment apparatus for a fuel filter housing as described in claim 2, characterized in that, The traction limiting member (67) includes a square lifting shaft (672) movably inserted in the rotating sleeve (671), and an upper axial end of the square lifting shaft (672) pressing against the top of the annular airbag (66). The annular pressure plate (673) on the surface and the magnetic metal pull plate (674) provided at the lower axial end of the square lifting shaft (672); A rotating gear (675) capable of meshing with a rack (35) is fitted on the cylinder below the parallel conveyor belt (4) of the rotating sleeve (671).

4. The surface treatment apparatus for a fuel filter housing as described in claim 3, characterized in that, The box shell (3) has through openings (31) on both sides for the parallel conveyor belt (4), the rotating clamping seat (6) and the cylindrical shell workpiece to enter and exit. A blower mechanism (32) capable of forming an air curtain barrier is also provided on the upper side of the through opening (31).

5. The surface treatment apparatus for a fuel filter housing as described in claim 4, characterized in that, The blower mechanism (32) includes a cavity air outlet strip (321) and an air blowing unit (323) connected to the cavity air outlet strip (321) through an air supply flat tube (322) that penetrates the side wall of the housing (3).

6. The surface treatment apparatus for a fuel filter housing as described in claim 5, characterized in that, An auxiliary support mechanism (33) is provided on the inner sidewall of the housing (3) on both sides of the parallel conveyor belt (4) to provide auxiliary support for the parallel conveyor belt (4); Below the auxiliary support mechanism (33), there is also a rack (35) that is connected to the inner wall of the housing (3) via a first transverse connecting rod (34); A second transverse link (36) is provided below the first transverse link (34), and the two sets of aligned second transverse links (36) suspend the magnetic limiting plate (37) below the parallel conveyor belt (4).

7. The surface treatment apparatus for a fuel filter housing as described in claim 6, characterized in that, The auxiliary support mechanism (33) includes a triangular support frame (331) and a strip support plate (332) fixed to the triangular support frame (331) by welding.

8. The surface treatment apparatus for a fuel filter housing as described in claim 7, characterized in that, The spraying mechanism (5) includes two bent cavity vertical plates (51) arranged on both sides of the parallel conveyor belt (4) and connected to the inner wall of the housing (3), a storage box (52) placed on the top of the housing (3), a conveying pipe (53) connecting the bent cavity vertical plates (51) and the storage box (52), and an array of coating nozzles (54) arranged on the plate surface of the bent cavity vertical plates (51).

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