A heating structure for a phosphating tank

Abstract

This utility model relates to the field of phosphating tank technology and discloses a heating structure for a phosphating tank, including a mounting base plate. A water storage tank is fixedly connected to the top of the mounting base plate. Pump bodies are fixedly connected to the left and right sides of the water storage tank. A circulation pipe is fixedly connected to the output end of the pump body. An anti-backflow mechanism is fixedly connected to the outside of the circulation pipe. Support rods are fixedly connected to the four corners of the top of the mounting base plate, and the phosphating tank body is fixedly connected to the top of the support rods. In this utility model, starting the pump body draws water from the water storage tank into the circulation pipe. The water flow squeezes the sealing plate, causing the return spring and sliding rod to deform. The water flows through the cross-shaped placement plate. After the pump stops, the sliding rod rebounds, and the sealing plate adheres to the sealing ring to prevent backflow. The water flow squeezes the metering baffle through the outlet pipe, flowing out metered according to the flow rate. The water flow delivery is stable, the anti-backflow is reliable, and the flow rate is controllable, improving the efficiency and accuracy of the circulation system.

Description

Technical Field

[0001] This utility model relates to the field of phosphating tank technology, and in particular to a heating structure for a phosphating tank. Background Technology

[0002] A phosphating tank is an industrial tank used for phosphating metal surfaces. It contains a phosphating solution, which forms a phosphating film on the metal surface through a chemical reaction to enhance corrosion resistance and coating adhesion. The heating mechanism provides heat to the phosphating solution to maintain the specific temperature required for the medium-high temperature phosphating process. Both heat the phosphating solution directly or indirectly through heating elements, and precise temperature control is achieved by combining temperature sensors and temperature controllers. It is also equipped with safety devices such as overheat protection.

[0003] A search revealed that Chinese publication number CN206828639U discloses a high-efficiency phosphating steel wire bath, comprising a fixing frame, a heat-conducting wire, a phosphating liquid inlet, and a permeation plate. The phosphating bath is mounted on the right end of the fixing frame, and a heating device is fixed inside the phosphating bath. The heat-conducting wire and the heating device are electrically connected. The phosphating liquid inlet is located at the top of the phosphating bath. A first moving guide rail is embedded at the bottom of the phosphating bath and connected to a phosphating liquid nozzle. The permeation plate is positioned below the phosphating liquid nozzle, and second moving guide rails are located on both sides below the permeation plate. A fixing clamp is connected to the outer wall of the second moving guide rail, and a conveying device is located inside the fixing clamp. A phosphating liquid collection tank is mounted at the bottom of the conveying device, and a rotating shaft is fixed to the end of the fixing clamp. This high-efficiency phosphating steel wire bath has a simple and novel structure. During use, the heat-conducting wire heats the phosphating liquid in the phosphating bath, facilitating a smoother subsequent phosphating process.

[0004] The specification of the aforementioned patent mentions that "the first moving guide rail is connected to the phosphating solution nozzle, and the permeation plate is placed below the phosphating solution nozzle." The phosphating solution has a certain acidity, and after flowing back to the circulation pipe, it will corrode metal components such as pipes, pumps, and valves. Long-term accumulation will lead to pipe perforation and leakage, which not only requires frequent maintenance and replacement of equipment, but also pollutes the working environment due to leakage of heating medium. In view of the above problems, a heating structure for the phosphating tank is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a heating structure for a phosphating tank, which solves the problem that some existing heating structures for phosphating tanks cannot prevent backflow in the circulation pipe.

[0006] To achieve the above objectives, this utility model provides a heating structure for a phosphating tank, including a mounting base plate. A water storage tank is fixedly connected to the top of the mounting base plate. A pump body is fixedly connected to both the left and right sides of the water storage tank. A circulation pipe is fixedly connected to the output end of the pump body. An anti-backflow mechanism is fixedly connected to the outside of the circulation pipe. Support rods are fixedly connected to the four corners of the top of the mounting base plate. A phosphating tank body is fixedly connected to the top of the support rods. Multiple corrosion-resistant grids are slidably connected inside the phosphating tank body. Disassembly and assembly mechanisms are fixedly connected to both the left and right sides of the corrosion-resistant grids.

[0007] The anti-backflow mechanism includes a mounting housing, which is fixedly connected to the outside of the circulation pipe. A cross-shaped placement plate is fixedly connected to the top of the inside of the mounting housing. A connecting housing is fixedly connected to the bottom of the outside of the cross-shaped placement plate. A sliding rod is slidably connected inside the connecting housing. A return spring is sleeved on the outside of the sliding rod. A sealing plate is fixedly connected to the bottom of the outside of the sliding rod. Multiple quantitative feeding components are fixedly connected to the outside of the circulation pipe.

[0008] As a further description of the above technical solution:

[0009] A sealing ring is fixedly connected to the inner bottom of the mounting housing, and the outer side of the sealing plate is in contact with the outer side of the sealing ring;

[0010] As a further description of the above technical solution:

[0011] The quantitative feeding assembly includes a mounting ring, the outer bottom of which is fixedly connected to the circulation pipe, and an outlet pipe is fixedly connected to the inner bottom of the mounting ring. A connecting shaft is rotatably connected to the inner bottom of the outlet pipe, and multiple quantitative baffles are fixedly connected to the outer side of the connecting shaft.

[0012] As a further description of the above technical solution:

[0013] A corrosion-resistant grid is fixedly connected inside the phosphating tank body, a heating pipe is fixedly connected inside the phosphating tank body, a mounting bracket is fixedly connected to the outside of the support rod on the right side, and the mounting shell is fixedly connected to the outside of the mounting bracket.

[0014] As a further description of the above technical solution:

[0015] The disassembly and assembly mechanism includes an extension plate, which is fixedly connected to the left and right sides of the corrosion-resistant grating. An installation plate is fixedly connected to the top of the extension plate. A pressing rod is slidably connected inside the installation plate. Connecting plates are rotatably connected to the front and rear sides of the pressing rod. A rotating clamping plate is rotatably connected to the other end of the connecting plate. Connecting frames are fixedly connected to the front and rear sides of the extension plate. A connecting shaft is fixedly connected inside the connecting frame. The rotating clamping plate is rotatably connected to the outside of the connecting shaft.

[0016] As a further description of the above technical solution:

[0017] The rotating plate is fixedly connected to a positioning rod, and the bottom end of the positioning rod is locked to the outside of the phosphating tank body.

[0018] As a further description of the above technical solution:

[0019] The connecting frame is externally fixedly connected to multiple telescopic rods, and the telescopic rods are externally fitted with mounting springs;

[0020] As a further description of the above technical solution:

[0021] One end of the reset spring is fixedly connected to the top outer part of the sealing plate, and the other end of the reset spring is fixedly connected to the bottom outer part of the connecting housing.

[0022] 1. In this utility model, the pump body is started to draw water from the storage tank into the circulation pipe. The water flow squeezes the sealing plate, causing the return spring and sliding rod to deform. The water flows through the cross placement plate. After the pump stops, the sliding rod rebounds, and the sealing plate fits the sealing ring to prevent backflow. The water flow squeezes the metering baffle through the outlet pipe and flows out metered according to the flow rate. The water flow is stable, the backflow prevention is reliable, the flow rate is controllable, and the efficiency and accuracy of the circulation system are improved.

[0023] 2. In this utility model, the pressing rod drives the rotating plate to rotate via the connecting plate, squeezing the installation spring of the telescopic rod to deform it. After the positioning clamp rod separates, the corrosion-resistant grid can be taken out. During installation, after placing it properly, the pressing rod is released, and the spring rebounds to lock the clamp rod in place. The disassembly and assembly are convenient and efficient, the fixing is stable, and it is easy to clean and replace the grid, improving the maintenance convenience of the phosphating tank and the practicality of the equipment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0025] Figure 1 This is a three-dimensional schematic diagram of the heating structure of a phosphating tank proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the outlet pipe of a heating structure for a phosphating tank proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the heating tube of a heating structure for a phosphating tank proposed in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0030] Figure 6 This is a schematic diagram of the corrosion-resistant grid mesh of the heating structure of a phosphating tank proposed in this utility model;

[0031] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0032] In the diagram: 1. Mounting base plate; 2. Water storage tank; 3. Pump body; 4. Circulation pipe; 5. Anti-backflow mechanism; 51. Mounting housing; 52. Cross placement plate; 53. Connecting housing; 54. Sliding rod; 55. Return spring; 56. Sealing plate; 57. Sealing ring; 58. Quantitative feeding assembly; 581. Mounting ring; 582. Water outlet pipe; 583. Connecting shaft; 584. Quantitative baffle; 6. Support rod; 7. Mounting frame; 8. Phosphating tank body; 9. Heating pipe; 10. Corrosion-resistant grating; 11. Disassembly and assembly mechanism; 111. Extension plate; 112. Mounting plate; 113. Pressing rod; 114. Connecting plate; 115. Rotating clamping plate; 116. Connecting frame; 117. Connecting shaft; 118. Positioning clamping rod; 119. Telescopic rod; 1110. Mounting spring. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] Reference Figures 1 to 3This utility model provides an embodiment of a heating structure for a phosphating tank, including a mounting base plate 1. The mounting base plate 1 has good load-bearing capacity and stability, and can firmly fix a water storage tank 2 and a support rod 6 on its top, ensuring that the entire device will not shift or tilt due to vibration or load during operation. A water storage tank 2 is fixedly connected to the top of the mounting base plate 1. The water storage tank 2 is a container for storing heating medium. Its internal space is precisely designed to hold a sufficient amount of heating medium to meet the heating requirements of the phosphating tank. Pump bodies 3 are fixedly connected to the left and right sides of the water storage tank 2. The main function of the pump bodies 3 is to extract the heating medium from the water storage tank 2 and deliver it to the circulation pipe 4 through the output end, providing power for the circulation of the heating medium. The output end of the pump body 3 is fixedly connected to the circulation pipe 4. The pipeline path of the circulation pipe 4 is optimized to ensure that the heating medium is evenly distributed within the phosphating tank body 8, improving heating efficiency. At the same time, the external side of the circulation pipe 4 is also... An insulation layer is provided to reduce heat loss of the heating medium during transportation and further improve the heating effect. The circulation pipe 4 is externally fixedly connected to an anti-backflow mechanism 5. Support rods 6 are fixedly connected to the top four corners of the mounting base plate 1, which have strong load-bearing capacity and stability, ensuring that the phosphating tank body 8 will not shake or tip over when filled with solution. The internal components of the anti-backflow mechanism 5 are encapsulated inside for protection, while ensuring that the connection between the anti-backflow mechanism and the circulation pipe 4 is firm and reliable. The top of the support rods 6 is fixedly connected to the phosphating tank body 8, which is the main place for phosphating treatment. Its interior is used to hold the workpiece to be treated and the phosphating solution. Multiple corrosion-resistant grid meshes 10 are slidably connected inside the phosphating tank body 8. The corrosion-resistant grid meshes 10 are used to place the workpiece to be treated. Its grid structure allows the phosphating solution to flow freely around the workpiece, ensuring that the workpiece can fully contact the phosphating solution and improve the uniformity and effect of phosphating treatment.

[0035] The anti-backflow mechanism 5 includes a mounting housing 51 and a cross-shaped placement plate 52 inside the anti-backflow mechanism, which serves to support and fix the housing 53. Its cross-shaped structure design can reduce the obstruction to the flow of heating medium while ensuring support strength. The mounting housing 51 is fixedly connected to the outside of the circulation pipe 4. The top of the inside of the mounting housing 51 is fixedly connected to the cross-shaped placement plate 52. The connection between the cross-shaped placement plate 52 and the mounting housing 51 is welded to ensure a firm connection. The bottom of the outside of the cross-shaped placement plate 52 is fixedly connected to the connecting housing 53. The connecting housing 53 is the mounting and guiding component of the sliding rod 54. Its interior is hollow, which can provide space and guidance for the sliding rod 54 to slide, ensuring that the sliding rod 54 can only slide in the vertical direction, ensuring the normal operation of the anti-backflow mechanism 5. The sliding rod 54 is slidably connected inside the connecting housing 53. The sliding rod 54 is the core moving component of the anti-backflow mechanism. Its sliding inside the connecting housing 53 can drive the sealing plate 56 to move up and down, thereby realizing the opening and closing of the circulation pipe 4 channel. A return spring 55 is sleeved on the outside of the sliding rod 54.

[0036] The return spring 55 plays a reset role outside the sliding rod 54. When the heating medium flows normally, the pressure of the medium will push the sealing plate 56 to move downward and compress the return spring 55 at the same time. The sealing plate 56 is fixedly connected to the bottom of the outer side of the sliding rod 54. The sealing plate 56 is the key component to achieve backflow prevention sealing. Its shape matches the sealing ring 57 and can fit tightly with the sealing ring 57 under the action of the return spring 55, thereby blocking the backflow channel of the heating medium in the circulation pipe 4. Multiple quantitative feeding components 58 are fixedly connected to the outside of the circulation pipe 4. The sealing ring 57 is fixedly connected to the bottom of the inner side of the mounting housing 51. The sealing ring 57 can undergo a certain deformation under the pressure of the sealing plate 56, thereby further improving the sealing effect and ensuring that the heating medium will not leak or backflow. The outside of the sealing plate 56 fits against the outside of the sealing ring 57.

[0037] Reference Figures 2 to 4The phosphating tank body 8 is internally fixedly connected to a corrosion-resistant grid mesh 10. The grid structure design of the corrosion-resistant grid mesh 10 remains unchanged, which not only provides a stable placement platform for the workpiece to be treated, but also ensures that the phosphating solution can flow freely around the workpiece, ensuring that all parts of the workpiece can fully contact the solution, thereby improving the uniformity and quality of the phosphating treatment. The phosphating tank body 8 is internally fixedly connected to a heating pipe 9. The heating pipe 9 is evenly distributed in the phosphating tank body 8, which can quickly raise the solution temperature and maintain stability. It works in conjunction with the circulation pipe 4 to further improve the heating efficiency and ensure that the phosphating treatment is carried out in a suitable temperature environment. The right support rod 6 is externally fixedly connected to a mounting bracket 7. The mounting bracket 7 allows for a more reasonable installation position of the anti-backflow mechanism 5, avoiding the impact on the service life of the circulation pipe 4 by relying solely on the circulation pipe 4 to bear its weight. It also facilitates the installation, inspection and maintenance of the anti-backflow mechanism 5. The mounting housing 51 is externally fixedly connected to the outside of the mounting bracket 7.

[0038] A positioning rod 118 is fixedly connected to the outside of the rotating clamping plate 115. The positioning rod 118 is made of a rigid metal rod, and its clamping structure with the phosphating tank body 8 is precisely designed to fix the position of the rotating clamping plate 115, preventing these components from shifting due to vibration or other factors during operation. The outer bottom end of the positioning rod 118 is clamped to the outside of the phosphating tank body 8. Multiple telescopic rods 119 are fixedly connected to the outside of the connecting frame 116. Each telescopic rod 119 consists of inner and outer sleeves and can axially... The telescopic rod 119 extends and retracts in the direction of the connection, serving as a connection and buffer. A mounting spring 1110 is sleeved on the outside of the telescopic rod 119. The mounting spring 1110 has an elastic return function. When the connecting frame 116 is subjected to external force, the telescopic rod 119 retracts and the mounting spring 1110 is compressed, thereby absorbing the impact of external force and reducing damage to the connecting frame 116 and related components. One end of the return spring 55 is fixedly connected to the outer top of the sealing plate 56, and the other end of the return spring 55 is fixedly connected to the outer bottom of the connecting housing 53.

[0039] Reference Figures 4 to 5The metering component 58 includes a mounting ring 581, which is made of a corrosion-resistant material matching the material of the circulation pipe 4. The mounting ring 581 is fixedly welded to the circulation pipe 4. The outer bottom of the mounting ring 581 is fixedly connected to the outer side of the circulation pipe 4. An outlet pipe 582 is fixedly connected inside the mounting ring 581. The outlet pipe 582 is a channel for drug delivery; one end is connected to the mounting ring 581, and the other end is used to deliver a metered amount of drug into the circulation pipe 4. The inner wall of the outlet pipe 582 is smooth, reducing resistance to drug flow and ensuring smooth drug delivery. A connecting shaft 583 is rotatably connected to the inner bottom of the outlet pipe 582. Metering baffles 584 are evenly distributed and fixed to the connecting shaft 583. When the connecting shaft 583 rotates, the metering baffles 584 rotate accordingly. Through their interaction with the inner wall of the outlet pipe 582, they can quantitatively divide and deliver the drug within the outlet pipe 582. Multiple metering baffles 584 are fixedly connected to the outer side of the connecting shaft 583.

[0040] Reference Figures 5 to 7 The corrosion-resistant grating 10 is fixedly connected to the left and right sides of the outside with a disassembly and assembly mechanism 11. The disassembly and assembly mechanism 11 includes an extension plate 111. The extension plate 111 is fixedly connected to the left and right sides of the outside of the corrosion-resistant grating 10. The top of the extension plate 111 is fixedly connected to an mounting plate 112. The mounting plate 112 is usually rectangular in shape and has a sliding hole inside that matches the pressing rod 113, so that the pressing rod 113 can slide smoothly up and down in it. The pressing rod 113 is slidably connected inside the mounting plate 112. By applying downward pressing force to it, the subsequent connecting plate 114 and rotating clamping plate 115 can be moved, thereby realizing the disassembly of the grating. When the pressing force is released, the pressing rod 113 will return to the upward reset under the action of the relevant components, so that the rotating clamping plate 115 returns to the clamping state, thereby realizing the installation and fixing of the grating. The front and rear sides of the pressing rod 113 are rotatably connected to the connecting plate 114.

[0041] Both ends of the connecting plate 114 are connected to the pressing rod 113 and the rotating clamping plate 115 respectively via rotating shafts, ensuring that the rotating clamping plate 115 can be flexibly rotated when the pressing rod 113 moves. The other end of the connecting plate 114 is rotatably connected to the rotating clamping plate 115. When the rotating clamping plate 115 rotates to the position where it is locked with the phosphating tank body 8, it can fix the corrosion-resistant grid 10 in the phosphating tank. When the rotating clamping plate 115 rotates in the opposite direction and disengages from the locking state with the phosphating tank body 8, the grid is removed from the phosphating tank. The front and rear sides of the extension plate 111 are both fixed. A connecting frame 116 is fixedly connected. The connecting frame 116 is usually two oppositely arranged plate-like structures fixed on the extension plate 111. The distance between them matches the width of the rotating plate 115, ensuring that the rotating plate 115 can rotate flexibly within it. A connecting shaft 117 is fixedly connected inside the connecting frame 116. The two ends of the connecting shaft 117 are fixed on the connecting frame 116. It has high strength and wear resistance, which can ensure that the rotating plate 115 rotates stably for a long time and is not easily deformed or damaged. The internal rotating connection of the rotating plate 115 is rotatably connected to the external of the connecting shaft 117.

[0042] Working principle: When water is transported into the circulation pipe 4, the pump body 3 is started. Under the action of the pump body 3, water from the water storage tank 2 is drawn into the circulation pipe 4. At this time, the force of the water flow squeezes the sealing plate 56, which in turn causes the sealing plate 56 to drive the return spring 55 to slide inside the connecting housing 53. Under the sliding of the return spring 55, the sliding rod 54 outside the return spring 55 deforms, which in turn allows the water to flow through the cross placement plate 52 inside the circulation pipe 4. When the pump body 3 is stopped, the water flow stops, causing the sliding rod 54 to rebound, which in turn allows the return spring 55 to drive the sealing plate 56 to fit tightly with the sealing ring 57, thus preventing backflow of water.

[0043] When the water flows inside the circulation pipe 4, it squeezes the metering baffle 584 through the outlet pipe 582, allowing the metering baffle 584 to rotate inside the outlet pipe 582 via the connecting shaft 583. The water flow rate is used to achieve a metered outflow of water, which then enters the phosphating tank body 8, causing the heating pipe 9 to start working and heat the water.

[0044] When disassembling and assembling the corrosion-resistant grating 10, pressing the pressing rod 113 causes the pressing rod 113 to rotate via the connecting plate 114, thereby causing the rotating plate 115 to rotate. This causes the rotating plate 115 to press against the telescopic rod 119, deforming the mounting spring 1110 on the outside of the telescopic rod 119. Consequently, the rotating plate 115 can rotate outside the connecting shaft 117, causing the positioning rod 118 to separate from the outside of the phosphating tank body 8. This allows the corrosion-resistant grating 10 to be removed from the inside of the phosphating tank body 8. When installing the corrosion-resistant grating 10, it is placed inside the phosphating tank body 8. Releasing the pressing rod 113 causes the mounting spring 1110 to rebound, causing the rotating plate 115 to engage the positioning rod 118 with the external through hole of the phosphating tank body 8. This completes the installation of the corrosion-resistant grating 10.

[0045] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A heating structure for a phosphating tank, comprising a mounting base plate, characterized in that: A water storage tank is fixedly connected to the top of the mounting base plate. A pump body is fixedly connected to both the left and right sides of the water storage tank. A circulation pipe is fixedly connected to the output end of the pump body. An anti-backflow mechanism is fixedly connected to the outside of the circulation pipe. Support rods are fixedly connected to the four corners of the top of the mounting base plate. A phosphating tank body is fixedly connected to the top of the support rods. Multiple corrosion-resistant grids are slidably connected inside the phosphating tank body. Disassembly and assembly mechanisms are fixedly connected to both the left and right sides of the corrosion-resistant grids. The anti-backflow mechanism includes a mounting housing, which is fixedly connected to the outside of the circulation pipe. A cross-shaped placement plate is fixedly connected to the top of the inside of the mounting housing. A connecting housing is fixedly connected to the bottom of the outside of the cross-shaped placement plate. A sliding rod is slidably connected inside the connecting housing. A return spring is sleeved on the outside of the sliding rod. A sealing plate is fixedly connected to the bottom of the outside of the sliding rod. Multiple quantitative feeding components are fixedly connected to the outside of the circulation pipe.

2. The heating structure for a phosphating tank according to claim 1, characterized in that: A sealing ring is fixedly connected to the bottom of the inner part of the mounting housing, and the outer part of the sealing plate is in contact with the outer part of the sealing ring.

3. The heating structure for a phosphating tank according to claim 2, characterized in that: The quantitative feeding assembly includes a mounting ring, which is fixedly connected to the outer bottom end of the circulation pipe. A water outlet pipe is fixedly connected to the inside of the mounting ring, and a connecting shaft is rotatably connected to the inner bottom end of the water outlet pipe. Multiple quantitative baffles are fixedly connected to the outside of the connecting shaft.

4. The heating structure for a phosphating tank according to claim 1, characterized in that: A corrosion-resistant grid is fixedly connected inside the phosphating tank body, and a heating pipe is fixedly connected inside the phosphating tank body. A mounting bracket is fixedly connected to the outside of the support rod on the right side, and the mounting housing is fixedly connected to the outside of the mounting bracket.

5. The heating structure for a phosphating tank according to claim 1, characterized in that: The disassembly and assembly mechanism includes an extension plate, which is fixedly connected to the left and right sides of the corrosion-resistant grating. An installation plate is fixedly connected to the top of the extension plate. A pressing rod is slidably connected inside the installation plate. Connecting plates are rotatably connected to the front and rear sides of the pressing rod. A rotating clamping plate is rotatably connected to the other end of the connecting plate. Connecting frames are fixedly connected to the front and rear sides of the extension plate. A connecting shaft is fixedly connected inside the connecting frame. The rotating clamping plate is rotatably connected to the outside of the connecting shaft.

6. The heating structure for a phosphating tank according to claim 5, characterized in that: The rotating plate is fixedly connected to a positioning rod, and the bottom end of the positioning rod is locked to the outside of the phosphating tank body.

7. The heating structure for a phosphating tank according to claim 6, characterized in that: The connecting frame is externally fixedly connected to multiple telescopic rods, and the telescopic rods are fitted with mounting springs.

8. The heating structure for a phosphating tank according to claim 2, characterized in that: One end of the reset spring is fixedly connected to the top outer part of the sealing plate, and the other end of the reset spring is fixedly connected to the bottom outer part of the connecting housing.

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