Plastic Performance Test Chamber Based on Corrosion Resistance Gradient Test

Abstract

This invention relates to the field of plastic testing technology, specifically to a plastic performance testing chamber based on a corrosion resistance gradient test. It includes a testing chamber and a door hinged to the chamber. The chamber's interior features symmetrically arranged supports for a plastic rod. A collection box is located between two cameras on either side. A stepped liquid supply device is installed on the inner wall of the chamber, connected to an air bladder. A hydraulic rod is installed on the inner wall to compress the air bladder, causing a power unit on the opposite side of the hydraulic rod to move. The rotation of the driven gear ring causes the plastic rod to rotate, and the sprayed corrosive liquid covers the surface of the rotated plastic rod. By progressively increasing the concentration of the sprayed corrosion-resistant liquid, the corrosion resistance of the plastic rod can be comprehensively evaluated, thereby improving the uniformity of the corrosion liquid coverage and ensuring the consistency and comparability of the test results.

Description

Technical Field

[0001] This invention relates to the field of plastic testing technology, and more specifically, to a plastic performance test chamber based on corrosion resistance gradient testing. Background Technology

[0002] Corrosion testers are mainly used in the electronics and electrical industry, university quality inspection institutes, and aerospace units for corrosion testing. They are suitable for corrosion testing of parts, electronic hardware components, protective layers of metal materials, and industrial products. Some plastic products have metal parts in their connectors, which need to be tested by corrosion resistance testers.

[0003] Different plastic resins possess varying degrees of chemical stability. Corrosion resistance tests determine how finished plastic products perform in different chemicals, solvents, or liquids. This is crucial for selecting the right materials for specific working environments, such as chemical pipelines, storage tanks, and equipment parts.

[0004] When testing the corrosion resistance of plastics, strong acid or alkaline liquids are typically used. A plastic rod is first fixed in place, and then the corrosion resistance is tested by spraying the liquid onto the plastic product. However, because the plastic rod is fixed, if the liquid is sprayed directly onto the rod, only part of the rod's surface will be in contact with the corrosive liquid, while the back of the rod will be covered with very little. This can lead to inconsistent corrosion levels at different locations, affecting the tester's judgment. Furthermore, each test can only measure the corrosion level of a specified concentration of corrosive liquid on the plastic rod, failing to create a gradient test during the process and hindering comparison. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic performance test chamber based on corrosion resistance gradient testing to solve the problems mentioned in the background art, aiming to improve the uniformity of corrosion liquid coverage and ensure the consistency and comparability of test results.

[0006] To achieve the above objectives, the present invention provides a plastic performance testing chamber based on a corrosion resistance gradient test, comprising a testing chamber and a door hinged to the testing chamber. The testing chamber has symmetrically arranged supports for supporting plastic rods, and a collection box is located between two cameras on both sides. A stepped liquid supply device is provided on the inner wall of the testing chamber, and the stepped liquid supply device is connected to an air bladder. A hydraulic rod is provided on the inner wall of the testing chamber for compressing the air bladder. The hydraulic rod causes a power unit located on the opposite side of the hydraulic rod to move. The power unit is used to move a support frame mounted on the supports. A camera is located on one side of the support frame. When the support frame moves, it pushes a flipping part located at the end of the support frame to rotate. The flipping part is used to rotate the plastic rod, so that the outer surface of the plastic rod at different angles comes into contact with the corrosive liquid sprayed from the stepped liquid supply device.

[0007] As a further improvement to this technical solution, the stepped liquid supply device includes a liquid storage box, a pump body, and multiple spray pipes. The liquid storage box is provided with multiple partitions, which divide the interior of the liquid storage box into multiple chambers for storing corrosive liquids of different concentrations. Each chamber corresponds to one pump body. The multiple chambers are gathered together and connected to the air bag. The air bag and the multiple spray pipes are connected by a liquid delivery pipe.

[0008] As a further improvement to this technical solution, the power unit includes a rack and a push rod. The end of the rack near the airbag is fixedly connected to the push rod, and the other end of the rack is slidably connected to an auxiliary rod. A first return spring that abuts against the rack is sleeved on the auxiliary rod. The end of the auxiliary rod is fixedly connected to the outer shell. The push rod is slidably connected to the outer shell, and the outer shell is fixedly connected to a bracket.

[0009] As a further improvement to this technical solution, the power unit also includes a gear and a lower lever. The gear is rotatably connected to a housing and meshes with a rack. The gear is coaxially connected to the lower lever. A vertical rod is fixedly connected to the end of the lower lever. A strip ring is slidably connected to the vertical rod. A support frame is fixedly connected to the strip ring. A slider is provided at the bottom of the support frame. The slider is slidably connected to a groove opened in the bracket. Multiple spray pipes pass through the support frame.

[0010] As a further improvement to this technical solution, the flipping part includes an active gear ring and a driven gear ring. Both the active gear ring and the driven gear ring have staggered arc-shaped grooves. Under normal conditions, the active gear ring and the driven gear ring cooperate with each other. When the active gear ring rotates forward, it drives the driven gear ring to rotate synchronously. When the active gear ring rotates in reverse, it slides with the driven gear ring.

[0011] As a further improvement to this technical solution, an auxiliary plate is fixedly connected to the outer ring of the active gear ring. The auxiliary plate is threaded with a lead screw. The lead screw is fixedly connected to a frame plate and a bracket. The lead screw is slidably connected to a stabilizing rod. A return spring fitted on the stabilizing rod abuts against the lead screw and the driven gear ring respectively. The end of the stabilizing rod is fixedly connected to the driven gear ring.

[0012] As a further improvement to this technical solution, a sleeve is fitted on the spray pipe, and a support plate is fixedly connected to both sides of each sleeve. The inner cylinder of the telescopic rod is fixedly connected to the bottom of the support plate, and a support frame is fixedly connected to the outer cylinder of the telescopic rod. A support spring is fitted on the telescopic rod, and a frame rod is fixedly connected to the sleeve. An arc-shaped block is provided at the end of the frame rod.

[0013] As a further improvement to this technical solution, the upper lever is connected to the lower lever via a speed-increasing gear, the upper lever is fixedly connected to a bent rod at its end, and the top end of the bent rod is slidably connected to an arc-shaped block.

[0014] As a further improvement to this technical solution, multiple air holes are opened on the inner wall of the sleeve, and the multiple sleeves are connected to a fan installed on the inner wall of the test chamber, and the fan is connected to a filter.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. In this plastic performance test chamber based on corrosion resistance gradient test, the driven toothed ring rotates, causing the plastic rod to rotate. The sprayed corrosive liquid covers the surface of the plastic rod after it is flipped over. By gradually increasing the concentration of the sprayed corrosion-resistant liquid, it is helpful to comprehensively evaluate the corrosion resistance performance of the plastic rod, thereby improving the uniformity of the corrosion liquid coverage and ensuring the consistency and comparability of the test results.

[0017] 2. In this plastic performance test chamber based on corrosion resistance gradient test, when the support frame moves to the maximum displacement, the pressure on the airbag is stopped, and under the elastic action of the first return spring, the rack drives the gear to rotate in the opposite direction, so that the upright moves the strip ring in the opposite direction, thereby realizing the left and right sliding of the spray pipe, which makes it easier to ensure the uniformity of the corrosive liquid spray.

[0018] 3. In this plastic performance test chamber based on corrosion resistance gradient testing, when different concentrations of corrosive liquid need to be sprayed, the atomized corrosive liquid is drawn into the filter by a fan to prevent the low concentration corrosive liquid from diluting the high concentration corrosive liquid and affecting the test results. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2This is a front view of the internal structure of the test chamber of the present invention (cut section).

[0021] Figure 3 This is a schematic diagram of the bracket, collection box, support frame, and flipping part of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0023] Figure 5 This is a top view of the connection structure between the liquid storage box and the spray pipe of the present invention;

[0024] Figure 6 This is a top view of the airbag compression push rod structure of the present invention;

[0025] Figure 7 This is an exploded top view of the support frame and active toothed ring structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the exploded structure of the active gear ring and the driven gear ring of the present invention;

[0027] Figure 9 This is a schematic diagram of the exploded structure of the sleeve and gear of the present invention;

[0028] Figure 10 This is a schematic diagram of the connection structure between the fan and the sleeve of the present invention.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 100. Test box; 101. Box door; 102. Stand; 103. Collection box;

[0031] 110. Hydraulic rod; 120. Camera;

[0032] 130. Stepped liquid supply device; 131. Liquid storage box; 132. Pump body; 133. Airbag; 134. Spray pipe;

[0033] 140. Support frame; 141. Strip ring; 142. Outer shell;

[0034] 150. Sleeve; 151. Frame rod; 152. Support spring; 153. Arc block;

[0035] 160. Upper lever; 161. Bend lever;

[0036] 170. Fan; 171. Filter;

[0037] 200. Power unit; 210. Rack; 211. Auxiliary rod; 212. First return spring;

[0038] 220. Top rod; 230. Gear; 240. Lower lever; 241. Vertical rod;

[0039] 300. Flipping section; 310. Active gear ring; 311. Auxiliary plate;

[0040] 320. Driven gear ring; 330. Lead screw; 331. Stabilizer bar; 332. Return spring. Detailed Implementation

[0041] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Example 1

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a plastic performance test chamber based on corrosion resistance gradient testing is provided, including a test chamber 100 and a door 101 hinged to the test chamber 100. Inside the test chamber 100, symmetrical supports 102 for supporting plastic rods are arranged. A collection box 103 is located between two cameras 120 on both sides. A stepped liquid supply device 130 is provided on the inner wall of the test chamber 100, and an airbag 133 is connected to the stepped liquid supply device 130. A hydraulic rod 110 is provided on the inner wall of the test chamber 100 for compressing the airbag 133. The hydraulic rod 110 is used to compress the airbag 133 relative to... The power unit 200 on the side moves and is used to move the support frame 140 set on the bracket 102. A camera 120 is set on one side of the support frame 140. When the support frame 140 moves, it pushes the flipping part 300 set at the end of the support frame 140 to rotate. The flipping part 300 is used to drive the plastic rod to rotate so that the outer surface of the plastic rod at different angles comes into contact with the corrosive liquid (e.g., sulfuric acid) sprayed by the stepped liquid supply device 130, thereby ensuring that the entire surface is in full contact with the corrosive liquid and that the corrosion is carried out uniformly on the entire sample surface.

[0043] Therefore, when testing the corrosion resistance of the plastic rod, the concentration of the corrosive liquid sprayed by the stepped liquid supply device 130 changes with each rotation of the plastic rod, so that the corrosion resistance of the plastic rod can be tested in corrosive liquids of different concentrations, and the changes on the surface of the plastic rod under different concentrations of corrosive liquid can be observed with the help of the camera 120.

[0044] Therefore, based on the above structure, refer to Figure 5The structure of the stepped liquid supply device 130 is further disclosed. The stepped liquid supply device 130 includes a liquid storage box 131, a pump body 132, and multiple spray pipes 134. The liquid storage box 131 has multiple partitions that divide its interior into multiple chambers for storing corrosive liquids of different concentrations. Each chamber corresponds to a pump body 132. The multiple chambers converge and connect to an airbag 133. The airbag 133 and the multiple spray pipes 134 are connected via infusion tubing. Thus, during the corrosion resistance gradient test, a low-concentration corrosive liquid is first sprayed onto the plastic rod through the spray pipes 134, ensuring the entire circumference of the plastic rod is covered. The corrosion condition on the plastic rod is then observed and recorded using a camera 120. Then, the above steps are repeated, gradually increasing the concentration of the sprayed corrosive liquid, which helps to comprehensively evaluate the corrosion resistance of the plastic rod. This allows for a more accurate understanding of the material's chemical stability and durability.

[0045] It should be noted that the airbag 133 and the infusion tubing shell used to transport corrosive liquid are made of fluororubber. This is because fluororubber has excellent chemical inertness and corrosion resistance and can withstand the corrosion of strong acids such as concentrated sulfuric acid.

[0046] Next, in order to recover the remaining corrosive liquid and prevent it from contaminating the inside of the test chamber 100, the excess corrosive liquid can be recovered through the collection box 103.

[0047] Furthermore, considering that the sprayed corrosive liquid is in the form of atomization, in order to ensure that the corrosive liquid can evenly cover the plastic rod, a hydraulic rod 110 for squeezing the airbag 133 is provided on the inner wall of the test chamber 100. With the assistance of the power unit 200 (at this time, the power unit 200 blocks the airbag 133), the cross-sectional area of ​​the squeezed airbag 133 is reduced, and the flow rate of the corrosive liquid in the infusion tube is increased. This allows the corrosive liquid to form a uniform atomized corrosive liquid when it is sprayed out at the end of the spray pipe 134, thereby improving the uniformity of the corrosive liquid coating the plastic rod.

[0048] At the same time, the compressed airbag 133 pushes the power unit 200 to one side, which in turn... Figure 6The structure of the power unit 200 is disclosed. The power unit 200 includes a rack 210 and a push rod 220. The end of the rack 210 near the airbag 133 is fixedly connected to the push rod 220, and the other end of the rack 210 is slidably connected to an auxiliary rod 211. A first return spring 212 is sleeved on the auxiliary rod 211 and abuts against the rack 210. The end of the auxiliary rod 211 is fixedly connected to a housing 142, and the push rod 220 is slidably connected to the housing 142. The housing 142 is fixedly connected to a bracket 102. Under normal conditions, the auxiliary rod 211 is in a released state, and the end of the push rod 220 is in contact with the airbag 133. Thus, when the airbag 133 pushes the push rod 220 to move, causing the rack 210 to compress the first return spring 212, the elastic potential energy of the first return spring 212 gradually increases, and the reaction force of the push rod 220 on the airbag 133 also increases, that is, the cross-section of the airbag 133 decreases, and the rack 210 moves towards the support frame 140.

[0049] Furthermore, the power unit 200 also includes a gear 230 and a lower lever 240. The gear 230 is rotatably connected to the housing 142 and meshes with the rack 210. The gear 230 and the lower lever 240 are coaxially connected. A vertical rod 241 is fixedly connected to the end of the lower lever 240. A strip ring 141 is slidably connected to the vertical rod 241, and a support frame 140 is fixedly connected to the strip ring 141. Thus, when the rack 210 moves towards the support frame 140, the rack 210 drives the gear 230 to rotate counterclockwise. At the same time, the lower lever 240 and the vertical rod 241 also rotate counterclockwise in the opposite direction to the gear 230. During this process, the vertical rod 241 slides within the strip ring 141, and the vertical rod 241 moves the strip ring 141 away from the housing 142 (see reference). Figure 6 (The direction of the middle arrow 'a'). Next, in Figure 6 Based on and combined Figure 3 and Figure 5 As shown, since the strip ring 141 is fixedly connected to the support frame 140, and the bottom of the support frame 140 is provided with a slider, the slider is slidably connected to the groove opened in the bracket 102. Multiple spray pipes 134 pass through the support frame 140, so the support frame 140 and the strip ring 141 move synchronously. During this process, the support frame 140 moves the multiple spray pipes 134. When the support frame 140 moves to its maximum displacement, the pressure on the airbag 133 stops, and under the elastic action of the first return spring 212, the rack 210 drives the gear 230 to rotate in the opposite direction, so that the upright 241 moves the strip ring 141 in the opposite direction, thereby realizing the left and right sliding of the spray pipes 134, which helps to ensure the uniformity of the corrosive liquid spray.

[0050] It should be noted that the counterclockwise rotation of gear 230 mentioned above is for reference only. Figure 6 As shown, hereinafter referred to as clockwise and counterclockwise.

[0051] In addition, during the counterclockwise rotation of gear 230, support frame 140 will also cause flipping part 300 to rotate the plastic rod, as follows:

[0052] First, combined Figure 7 and Figure 8 As shown, the structure of the flipping part 300 is disclosed. The flipping part 300 includes a driving gear ring 310 and a driven gear ring 320. Both the driving gear ring 310 and the driven gear ring 320 have staggered arc-shaped grooves. Under normal conditions, the driving gear ring 310 and the driven gear ring 320 cooperate with each other. When the driving gear ring 310 rotates forward, it drives the driven gear ring 320 to rotate synchronously. When the driving gear ring 310 rotates in reverse, it slides with the driven gear ring 320. On the other hand, an auxiliary plate 311 is fixedly connected to the outer ring of the driving gear ring 310. The auxiliary plate 311 is threadedly connected to a lead screw 330. The lead screw 330 is fixedly connected to a frame plate and a bracket 102. The lead screw 330 is slidably connected to a stabilizing rod 331. A return spring 332 sleeved on the stabilizing rod 331 abuts against the lead screw 330 and the driven gear ring 320 respectively. The end of the stabilizing rod 331 is fixedly connected to the driven gear ring 320. Thus, when the support frame 140 pushes the active gear ring 310 to move, the auxiliary plate 311 rotates forward under the action of the lead screw 330. Since the active gear ring 310 and the driven gear ring 320 are normally engaged, the driven gear ring 320 rotates synchronously with the active gear ring 310. The stabilizing rod 331 collapses into the lead screw 330, increasing its elastic potential energy. Because the plastic rod passes through the active gear ring 310 and is stuck inside the driven gear ring 320, the rotation of the driven gear ring 320 causes the plastic rod to rotate. This, combined with the sprayed corrosive liquid, covers the surface of the plastic rod after it has flipped over, improving the uniformity of the corrosive liquid coverage and ensuring the consistency and comparability of the test results.

[0053] It should be noted that in order to secure the plastic rod, a rubber block can be installed inside the driven toothed ring 320 to increase the friction between the rubber block and the plastic rod.

[0054] Conversely, when the support frame 140 no longer pushes the active gear ring 310 to move (i.e., when the support frame 140 moves in the opposite direction), under the elastic action of the stabilizer rod 331, it pushes the driven gear ring 320 to move in the opposite direction. At this time, the auxiliary plate 311 rotates in the opposite direction under the action of the lead screw 330, and sliding occurs between the driven gear ring 320 and the active gear ring 310. The purpose of this is to prevent the plastic rod, which has already rotated a certain angle, from rotating in the opposite direction, causing it to return to its initial position, so that the corrosive liquid can only cover a part of the surface of the plastic rod.

[0055] It should be noted that the aforementioned forward rotation refers to... Figure 8 As shown, arrow b points in the direction of forward rotation, and arrow c points in the direction of reverse rotation.

[0056] In addition, combined Figure 4 , Figure 9 and Figure 10 As shown, to prevent the low-concentration corrosive liquid on the spray pipe 134 from dripping onto the plastic rod and affecting the test results during the high-concentration corrosive liquid spraying process from low to high concentration, a sleeve 150 is fitted onto the spray pipe 134. Each sleeve 150 has a support plate fixedly connected to both sides. The inner cylinder of the telescopic rod is fixedly connected to the bottom of the support plate. A support frame 140 is fixedly connected to the outer cylinder of the telescopic rod, and a support spring 152 is fitted onto the telescopic rod. A support rod 151 is fixedly connected to the sleeve 150, and an arc-shaped block 153 is provided at the end of the support rod 151. On the other hand, an upper lever 160 is connected above the lower lever 240 via a speed-increasing gear 230. A bent rod 161 is fixedly connected to the end of the upper lever 160, and the arc-shaped block 153 is slidably connected to the top end of the bent rod 161. When gear 230 rotates counterclockwise, the upper lever 160 rotates at a speed greater than that of gear 230 under the action of speed-increasing gear 230. During this process, the top end of the bent rod 161 slides on the inclined surface of the arc block 153, and the bent rod 161 slides from the highest end to the lowest end of the inclined surface. The sleeve 150 slides upward on the spray pipe 134.

[0057] Conversely, when gear 230 rotates clockwise, the bent rod 161 slides from the bottom to the top of the inclined plane, and the sleeve 150 slides downwards. During this process, because the sleeve 150 is fitted onto the spray pipe 134, and multiple air holes are opened on the inner wall of the sleeve 150, the multiple sleeves 150 are connected to the fan 170 installed on the inner wall of the test chamber 100, and the fan 170 is connected to the filter 171. Therefore, when different concentrations of corrosive liquid need to be sprayed, the atomized corrosive liquid is drawn into the filter 171 by the fan 170 to prevent the low-concentration corrosive liquid from diluting the high-concentration corrosive liquid and affecting the test results.

[0058] Sodium hydroxide can be used in filter 171. Sodium hydroxide is an alkaline adsorbent that can be used to neutralize acidic gases. After reacting with acidic gases, it forms salt and water, thereby converting them into a relatively safe form.

[0059] In this way, the degree of corrosion of the plastic rod is recorded after each change of the corrosive solution with a different concentration, thus forming test results with different gradients, thereby optimizing the performance and stability of the material.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic performance test chamber based on corrosion resistance gradient testing, comprising a test chamber (100) and a door (101) hinged to the test chamber (100), wherein symmetrical supports (102) for supporting plastic rods are arranged inside the test chamber (100), and a collection box (103) is provided between two cameras (120), characterized in that: The inner wall of the test box (100) is provided with a step liquid supply device (130), the step liquid supply device (130) is communicated with an air bag (133), the inner wall of the test box (100) is provided with a hydraulic rod (110) for extruding the air bag (133), the hydraulic rod (110) is used for moving the power part (200) arranged on the opposite side of the hydraulic rod (110), the power part (200) is used for driving the support frame (140) arranged on the support (102) to move, one side of the support frame (140) is provided with a camera (120), when the support frame (140) moves, the turnover part (300) arranged at the end of the support frame (140) is pushed to rotate, the turnover part (300) is used for driving the plastic rod to rotate, so that the outer surface of the plastic rod at different angles is contacted with the corrosion liquid sprayed by the step liquid supply device (130); The step liquid supply device (130) comprises a liquid storage box (131), a pump body (132) and a plurality of spray pipes (134); The power part (200) comprises a rack (210) and a top rod (220), one end of the rack (210) close to the air bag (133) is fixedly connected with the top rod (220), the other end of the rack (210) is slidably connected with an auxiliary rod (211), the auxiliary rod (211) is sleeved with a first reset spring (212) abutting against the rack (210), the end of the auxiliary rod (211) is fixedly connected with a shell (142), the top rod (220) is slidably connected with the shell (142), and the shell (142) is fixedly connected with the support (102); The power part (200) further comprises a gear (230) and a lower shifting rod (240), the shell (142) is rotatably connected with the gear (230), the gear (230) is engaged with the rack (210), the gear (230) is coaxially connected with the lower shifting rod (240), the end of the lower shifting rod (240) is fixedly connected with a vertical rod (241), the vertical rod (241) is slidably connected with a strip-shaped ring (141), the strip-shaped ring (141) is fixedly connected with the support frame (140), the bottom of the support frame (140) is provided with a sliding block, the sliding block is slidably connected with a sliding groove formed in the support (102), and the plurality of spray pipes (134) pass through the support frame (140); The turnover part (300) comprises a driving gear ring (310) and a driven gear ring (320), the driving gear ring (310) and the driven gear ring (320) are both provided with staggered arc-shaped grooves, in the normal state, the driving gear ring (310) and the driven gear ring (320) cooperate with each other, the driving gear ring (310) drives the driven gear ring (320) to rotate synchronously in the forward direction, and the driving gear ring (310) and the driven gear ring (320) slide relative to each other in the reverse direction. The main drive gear ring (310) outer ring fixedly connected with auxiliary plate (311), the auxiliary plate (311) is threaded with lead screw (330), the lead screw (330) fixedly connected with the frame plate is connected with support (102), and the lead screw (330) is slidably connected with stabilizing bar (331), the stabilizing bar (331) is sleeved with return spring (332) respectively with lead screw (330) and driven gear ring (320) is opposite, the stabilizing bar (331) end fixedly connected driven gear ring (320).

2. The plastic performance test chamber based on corrosion resistance gradient test of claim 1, wherein: The liquid storage box (131) is provided with a plurality of partitions, the partitions divide the inside of the liquid storage box (131) into a plurality of chambers for storing different concentrations of corrosive liquid, and each chamber corresponds to a pump body (132), a plurality of chambers are collected together and communicated with the air bag (133), the air bag (133) and a plurality of spray pipes (134) are connected by infusion tubes.

3. The corrosion resistance gradient test based plastic performance test chamber of claim 1, wherein: The sleeve (150) is sleeved on the spray pipe (134), the both sides of each sleeve (150) are fixedly connected with the support plate, the bottom of the support plate is fixedly connected with the inner cylinder of the telescopic rod, the outer cylinder of the telescopic rod is fixedly connected with the support frame (140), the telescopic rod is sleeved with the supporting spring (152), the sleeve (150) is fixedly connected with the frame rod (151), and the end of the frame rod (151) is provided with an arc block (153).

4. The corrosion resistance gradient test based plastic performance test chamber according to claim 3, wherein: The upper shifting rod (160) is connected with the upper shifting rod (160) through the speed increasing gear (230) above the lower shifting rod (240), the end of the upper shifting rod (160) is fixedly connected with the bent rod (161), and the top end of the bent rod (161) is slidably connected with the arc block (153).

5. The corrosion resistance gradient test based plastic performance test chamber of claim 3, wherein: A plurality of air holes are formed in the inner wall of the sleeve (150), a plurality of the sleeve (150) are communicated with the fan (170) arranged on the inner wall of the test box (100), and the fan (170) is connected with the filter (171).

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