A leak-free chemical pump with adaptive pressure regulation function
By designing the moving cylinder and reflux mechanism of the chemical leak-free pump, automatic pressure relief and reflux are achieved when the pressure is too high, solving the pressure relief problem of the chemical leak-free pump when the pressure is too high, and improving the safety and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG BOCHENG PUMP MANUFACTURING CO LTD
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing leak-free chemical pumps cannot automatically release pressure when it is too high, which may damage the seals and affect the pump's function and lifespan.
A leak-free chemical pump with adaptive pressure regulation function was designed. The pump uses liquid to push the moving cylinder to slide inside the pressure relief cylinder. Automatic pressure relief is achieved by using a connecting rod and spring mechanism. The depressurized liquid is returned through a return mechanism to avoid waste.
This technology enables leak-free chemical pumps to automatically release pressure when the pressure is too high, protecting seals, preventing leaks, and improving equipment safety and service life.
Smart Images
Figure CN224515367U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automation control technology, and in particular relates to a chemical leak-free pump with pressure adaptive adjustment function. Background Technology
[0002] A chemical leak-free pump is a pump designed to prevent liquid or gas leakage. It is commonly used in industries such as chemical, petroleum, and pharmaceutical. Its main feature is that the pump's sealing design can completely prevent media leakage, thereby reducing environmental pollution, improving safety, and extending equipment life. A chemical leak-free pump with pressure adaptive regulation function is a pump that can automatically adjust its operating state according to pressure changes during operation to maintain efficient operation and a leak-free state.
[0003] Existing leak-free chemical pumps are typically designed with good sealing performance. However, without an automatic pressure relief function, excessive internal pressure may damage the seals and affect the overall function of the pump. Therefore, it is necessary for the pump to be able to relieve pressure automatically. Thus, we propose a leak-free chemical pump with adaptive pressure regulation function. Utility Model Content
[0004] The purpose of this invention is to provide a chemical leak-free pump with pressure adaptive adjustment function. By pushing the moving cylinder with liquid, the moving cylinder pushes the connecting rod to slide inside the pressure relief cylinder. At the same time, the moving cylinder also squeezes the first spring. When the liquid inlet is disengaged from the fixed cylinder, the liquid will flow out from the liquid inlet to relieve pressure, thus solving the problem of enabling the chemical leak-free pump to automatically relieve pressure.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a chemical leak-free pump with pressure adaptive adjustment function, including a pump body and a base fixedly connected to the bottom of the pump body. A pressure relief mechanism is provided on one side of the pump body and a return flow mechanism is provided on the other side of the pump body. The pressure relief mechanism includes a pressure relief cylinder fixedly connected to one side of the pump body. A fixed cylinder is fixedly connected to the inner wall of the pressure relief cylinder. Four sliders are slidably connected to the inner wall of the fixed cylinder. The fixed cylinder has grooves inside that match the outer surfaces of the four sliders. A movable cylinder is fixedly connected to the outer surfaces of the four sliders. The movable cylinder is located inside the fixed cylinder and has several liquid inlets inside for liquid discharge during pressure relief. Four connecting rods are fixedly connected to one side of the movable cylinder. One end of each connecting rod penetrates the inner wall of the pressure relief cylinder. Four first springs are fixedly connected between the outer surface of the movable cylinder and the inner wall of the pressure relief cylinder. The inner sides of each of the four first springs are sleeved on the outer surfaces of the four connecting rods. A first limiting plate is fixedly connected to one end of each of the four connecting rods.
[0006] Furthermore, a first protective shell is fixedly connected to one side of the movable cylinder, and a second protective shell is slidably connected to the inner wall of the first protective shell. The connecting rod and the first spring are both disposed inside the first and second protective shells.
[0007] Furthermore, four rubber rings are provided between one side of the first limiting disc and the outer surface of the pressure relief cylinder. The outer surfaces of the four rubber rings are fixedly connected to the outer surface of the pressure relief cylinder, and the inner sides of the four rubber rings are sleeved on the outer surfaces of the four connecting rods.
[0008] Furthermore, a first connecting ring is fixedly connected to the outer surface of the pressure relief cylinder, a first L-shaped block is fixedly connected to one side of the first connecting ring, a second L-shaped block is fixedly connected to the other side of the first connecting ring, a first connecting strip is fixedly connected to the bottom of the first L-shaped block and the second L-shaped block, and the outer surface of the first connecting strip is fixedly connected to the outer surface of the base.
[0009] Furthermore, the reflux mechanism includes a first reflux cylinder fixedly connected to the other side of the pump body, an expansion cylinder fixedly connected to one side of the first reflux cylinder, a second reflux cylinder fixedly connected to one side of the expansion cylinder, the expansion cylinder being disposed between the first and second reflux cylinders, a flow-limiting disc being provided inside the second reflux cylinder, a water-passing disc being fixedly connected to the inner wall of the first reflux cylinder, a sliding rod being provided between the flow-limiting disc and the water-passing disc, the sliding rod being disposed inside the expansion cylinder, one end of the sliding rod being fixedly connected to the outer surface of the flow-limiting disc, the other end of the sliding rod penetrating the outer surface of the water-passing disc and being fixedly connected to a second limiting disc, a second spring being fixedly connected between the flow-limiting disc and the water-passing disc, the inner side of the second spring being sleeved on the outer surface of the sliding rod, and a plurality of liquid passage holes being opened inside the water-passing disc for liquid discharge during reflux.
[0010] Furthermore, four limiting rods are slidably connected to the inner wall of the flow limiting plate. One end of each of the four limiting rods is fixedly connected to the outer surface of the water flow plate, and the other end of each of the four limiting rods is fixedly connected to a fixing plate.
[0011] Furthermore, four protective arc plates are fixedly connected to the side of the flow limiting plate near the water passage plate. The water passage plate has arc-shaped grooves that match the outer surfaces of the four protective arc plates. A limit ring is fixedly connected to one end of each of the four protective arc plates, and the outer surface of the limit ring is in contact with the outer surface of the water passage plate.
[0012] Furthermore, a liquid passage pipe is fixedly connected to the side of the second return cylinder away from the pump body for returning liquid, and the end of the liquid passage pipe away from the second return cylinder is fixedly connected to the bottom of the pressure relief cylinder.
[0013] Furthermore, a second connecting ring is fixedly connected to the outer surface of the second reflux cylinder, a third L-shaped block is fixedly connected to one side of the second connecting ring, a fourth L-shaped block is fixedly connected to the other side of the second connecting ring, and a second connecting strip is fixedly connected to the bottom of the third L-shaped block and the fourth L-shaped block, with the outer surface of the second connecting strip fixedly connected to the outer surface of the base.
[0014] This utility model has the following beneficial effects: 1. This utility model incorporates a movable cylinder. The liquid compresses the movable cylinder, causing it to slide within a groove on the fixed cylinder. Simultaneously, the movable cylinder pushes four connecting rods, causing them to slide within a pressure relief cylinder. The movable cylinder then compresses the first spring, allowing it to reset. Simultaneously, the movable cylinder also causes the first protective shell to slide on the second protective shell. By using a movable cylinder that can slide within the fixed cylinder, the pump body is automatically depressurized when the pressure inside is too high.
[0015] 2. This utility model incorporates a flow-limiting disc. The liquid pushes the flow-limiting disc inside the second return cylinder, which in turn pushes the sliding rod, causing it to slide within the water-passing plate. Simultaneously, the flow-limiting disc compresses the second spring. When the flow-limiting disc detaches from the second return cylinder and enters the expansion cylinder, the liquid can pass through the expansion cylinder, then through several liquid passage holes on the water-passing plate, and flow into the first return cylinder. By using the flow-limiting disc, which can move within the second return cylinder, the liquid is allowed to return after the pump body is depressurized, thus avoiding waste.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are 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.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the first connecting ring structure of this utility model; Figure 3 This is a schematic diagram of the liquid passage structure of this utility model; Figure 4 This is a schematic diagram of the fixed cylinder structure of this utility model; Figure 5 This is a schematic diagram of the movable cylinder structure of this utility model; Figure 6 This is a schematic diagram of the limiting ring structure of this utility model; Figure 7 This is a schematic diagram of the current limiting disk structure of this utility model; Figure 8 This is a schematic diagram of the second spring structure of this utility model.
[0019] The attached diagram lists the components represented by each number as follows: 101. Pump body; 102. Base; 2. Pressure relief mechanism; 201. Pressure relief cylinder; 202. Fixed cylinder; 203. Slider; 204. Slide groove; 205. Moving cylinder; 206. Liquid inlet; 207. Connecting rod; 208. First spring; 209. First limiting plate; 210. First protective shell; 211. Second protective shell; 212. Rubber ring; 213. First connecting ring; 214. First L-shaped block; 215. Second L-shaped block; 216. First connecting strip; 3. Reflux machine Structure; 301, First reflux cylinder; 302, Expansion cylinder; 303, Second reflux cylinder; 304, Flow limiting plate; 305, Sliding rod; 306, Water passage plate; 307, Second limiting plate; 308, Second spring; 309, Liquid passage hole; 310, Limiting rod; 311, Fixing plate; 312, Protective arc plate; 313, Arc groove; 314, Limiting ring; 315, Liquid passage pipe; 316, Second connecting ring; 317, Third L-shaped block; 318, Fourth L-shaped block; 319, Second connecting strip. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-8 As shown, this utility model is a chemical leak-free pump with pressure adaptive adjustment function, including a pump body 101 and a base 102 fixedly connected to the bottom of the pump body 101. A pressure relief mechanism 2 is provided on one side of the pump body 101, and a return flow mechanism 3 is provided on the other side of the pump body 101. This device can relieve the pressure inside the pump through the pressure relief mechanism 2 to prevent the internal pressure from being too high, and then the liquid that is relieved can be returned through the return flow mechanism 3. The pressure relief mechanism 2 includes a pressure relief cylinder 201 fixedly connected to one side of the pump body 101. A fixed cylinder 202 is fixedly connected to the inner wall of the pressure relief cylinder 201. Four sliders 203 are slidably connected to the inner wall of the fixed cylinder 202. The fixed cylinder 202 has grooves 204 that match the outer surfaces of the four sliders 203. The grooves 204 restrict the movement of the sliders 203, so that the sliders 203 can only move along the grooves 204, thereby restricting the movement of the fixed cylinder 202. A movable cylinder 205 is fixedly connected to the outer surfaces of the four sliders 203. The movable cylinder 205 is located inside the fixed cylinder 202. Several liquid inlets 206 are opened inside the movable cylinder 205 for liquid to be discharged during pressure relief. Four connecting rods 207 are fixedly connected to one side of the movable cylinder 205. When the movable cylinder 205 moves to the point of disengagement from the fixed cylinder 202, the liquid will be discharged through the liquid inlet 206, thereby relieving the pressure inside the device. One end of the four connecting rods 207 penetrates the inner wall of the pressure relief cylinder 201. Four first springs 208 are fixedly connected between the outer surface of the movable cylinder 205 and the inner wall of the pressure relief cylinder 201. The inner sides of the four first springs 208 are all sleeved on the outer surface of the four connecting rods 207. One end of the four connecting rods 207 is fixedly connected to a first limiting plate 209. The connecting rods 207 restrict the movement of the first springs 208, so that the first springs 208 can only move along the connecting rods 207, preventing the first springs 208 from tilting or deviating during the movement.
[0022] A first protective shell 210 is fixedly connected to one side of the movable cylinder 205. A second protective shell 211 is slidably connected to the inner wall of the first protective shell 210. The connecting rod 207 and the first spring 208 are both located inside the first protective shell 210 and the second protective shell 211. When the movable cylinder 205 moves, it pushes the first protective shell 210, and then the first protective shell 210 slides on the second protective shell 211. At this time, the first protective shell 210 plays a sealing role and protects the inner components.
[0023] Four rubber rings 212 are provided between one side of the first limiting plate 209 and the outer surface of the pressure relief cylinder 201. The outer surfaces of the four rubber rings 212 are fixedly connected to the outer surface of the pressure relief cylinder 201, and the inner sides of the four rubber rings 212 are sleeved on the outer surfaces of the four connecting rods 207. The rubber rings 212 that contact the first limiting plate 209 play a certain sealing role inside the pressure relief cylinder 201, preventing liquid from seeping out of the pressure relief cylinder 201 when the pressure is released.
[0024] A first connecting ring 213 is fixedly connected to the outer surface of the pressure relief cylinder 201. A first L-shaped block 214 is fixedly connected to one side of the first connecting ring 213, and a second L-shaped block 215 is fixedly connected to the other side of the first connecting ring 213. A first connecting strip 216 is fixedly connected to the bottom of the first L-shaped block 214 and the second L-shaped block 215. The outer surface of the first connecting strip 216 is fixedly connected to the outer surface of the base 102. The first L-shaped block 214 and the second L-shaped block 215 together support the first connecting ring 213, thereby enabling the first connecting ring 213 to support the pressure relief cylinder 201 and allowing the pressure relief cylinder 201 to relieve pressure more stably.
[0025] The reflux mechanism 3 includes a first reflux cylinder 301 fixedly connected to the other side of the pump body 101. An expansion cylinder 302 is fixedly connected to one side of the first reflux cylinder 301, and a second reflux cylinder 303 is fixedly connected to one side of the expansion cylinder 302. The expansion cylinder 302 is located between the first reflux cylinder 301 and the second reflux cylinder 303. The liquid will first pass through the second reflux cylinder 303, then through the expansion cylinder 302, and finally through the first reflux cylinder 301 back into the pump. A flow-limiting plate 304 is provided inside the second reflux cylinder 303. A water-passing plate 306 is fixedly connected to the inner wall of the first reflux cylinder 301. A sliding rod 305 is provided between the flow-limiting plate 304 and the water-passing plate 306. The sliding rod 305 is located inside the expansion cylinder 302. The liquid will push the flow-limiting plate 304, and then the flow-limiting plate 304 will push the sliding rod 305, causing the sliding rod 305 to slide within the water-passing plate 306. One end of the slide rod 305 is fixedly connected to the outer surface of the flow limiting plate 304, and the other end of the slide rod 305 passes through the outer surface of the water passage plate 306 and is fixedly connected to the second limiting plate 307. A second spring 308 is fixedly connected between the flow limiting plate 304 and the water passage plate 306. The inner side of the second spring 308 is sleeved with the outer surface of the slide rod 305. Several liquid passage holes 309 are opened inside the water passage plate 306 for liquid to be discharged during backflow. The slide rod 305 restricts the movement of the second spring 308, so that the second spring 308 can only move along the slide rod 305, preventing the second spring 308 from tilting or deviating during the movement.
[0026] Four limiting rods 310 are slidably connected to the inner wall of the flow limiting plate 304. One end of each of the four limiting rods 310 is fixedly connected to the outer surface of the water passage plate 306, and the other end of each of the four limiting rods 310 is fixedly connected to a fixing plate 311. The fixing plate 311 has a certain limiting function to prevent excessive movement of the flow limiting plate 304, thereby ensuring that the limiting rods 310 will not detach from the inside of the water passage plate 306.
[0027] Four protective arc plates 312 are fixedly connected to one side of the flow limiting plate 304 near the water passage plate 306. The water passage plate 306 has arc-shaped grooves 313 that match the outer surfaces of the four protective arc plates 312. One end of each of the four protective arc plates 312 is fixedly connected to a limiting ring 314. The outer surface of the limiting ring 314 contacts the outer surface of the water passage plate 306. When the flow limiting plate 304 moves, it will also push the protective arc plates 312, causing the protective arc plates 312 to slide in the arc-shaped grooves 313. At this time, the protective arc plates 312 play a protective role for the components inside them.
[0028] The second return cylinder 303 is fixedly connected to a liquid passage pipe 315 on the side away from the pump body 101 for returning liquid. The end of the liquid passage pipe 315 away from the second return cylinder 303 is fixedly connected to the bottom of the pressure relief cylinder 201. The pressure-relieved liquid will enter the liquid passage pipe 315 and then flow back into the second return cylinder 303 through the liquid passage pipe 315.
[0029] A second connecting ring 316 is fixedly connected to the outer surface of the second reflux cylinder 303. A third L-shaped block 317 is fixedly connected to one side of the second connecting ring 316, and a fourth L-shaped block 318 is fixedly connected to the other side of the second connecting ring 316. A second connecting strip 319 is fixedly connected to the bottom of the third L-shaped block 317 and the fourth L-shaped block 318. The outer surface of the second connecting strip 319 is fixedly connected to the outer surface of the base 102. The fourth L-shaped block 318 and the third L-shaped block 317 provide a certain support for the second connecting ring 316, thereby providing stable support for the second reflux cylinder 303 through the second connecting ring 316, so that the device can perform stable reflux.
[0030] One specific application of this embodiment is: When the staff needs to use the equipment, the liquid will normally enter the pressure relief cylinder 201. At this time, the liquid will be in the movable cylinder 205 on the fixed cylinder 202. When the pressure in the pump body 101 is too high, the liquid will squeeze the movable cylinder 205. At this time, the movable cylinder 205 will drive the slider 203 to slide in the slide groove 204 on the fixed cylinder 202. At the same time, the movable cylinder 205 will also push the four connecting rods 207, so that the four connecting rods 207 slide in the pressure relief cylinder 201. Then the moving cylinder 205 will squeeze the first spring 208, so that the first spring 208 can be reset. At the same time, the moving cylinder 205 will also drive the first protective shell 210 to slide on the second protective shell 211. When the liquid inlet 206 on the moving cylinder 205 moves out of the fixed cylinder 202, the liquid will flow out through the liquid inlet 206, achieving the effect of automatically relieving pressure on the pump body 101 when the pressure inside the pump body 101 is too high. The liquid flows into the second return cylinder 303 through the liquid pipe 315. At this time, the liquid will push the flow limiting plate 304 in the second return cylinder 303. Then the flow limiting plate 304 will push the slide rod 305, causing the slide rod 305 to slide in the water plate 306. At the same time, the flow limiting plate 304 will also squeeze the second spring 308. When the flow limiting plate 304 separates from the second return cylinder 303 and enters the expansion cylinder 302; Liquid can pass through the expansion cylinder 302, then through several liquid passage holes 309 on the water passage plate 306, and flow into the first return cylinder 301. Finally, it flows into the pump body 101 from the first return cylinder 301. This achieves the effect of allowing the liquid to return after the pump body 101 is depressurized, thus avoiding waste. When the flow limiting plate 304 moves, the four limiting rods 310 will limit the movement of the flow limiting plate 304. Then, the flow limiting plate 304 will also drive the four protective arc plates 312 to slide in the arc groove 313.
[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A chemical leakage-free pump with pressure self-adaptive adjustment function, comprising a pump body (101) and a base (102) fixedly connected to the bottom of the pump body (101), characterized in that: The pump body (101) is provided with a pressure relief mechanism (2) on one side and a return flow mechanism (3) on the other side. The pressure relief mechanism (2) includes a pressure relief cylinder (201) fixedly connected to one side of the pump body (101). A fixed cylinder (202) is fixedly connected to the inner wall of the pressure relief cylinder (201). Four sliders (203) are slidably connected to the inner wall of the fixed cylinder (202). The fixed cylinder (202) has grooves (204) inside that match the outer surfaces of the four sliders (203). A movable cylinder (205) is fixedly connected to the outer surfaces of the four sliders (203). The movable cylinder (205) is located inside the fixed cylinder (202). 205) has several liquid inlets (206) inside for liquid discharge during pressure relief. Four connecting rods (207) are fixedly connected to one side of the movable cylinder (205). One end of the four connecting rods (207) penetrates the inner wall of the pressure relief cylinder (201). Four first springs (208) are fixedly connected between the outer surface of the movable cylinder (205) and the inner wall of the pressure relief cylinder (201). The inner side of each of the four first springs (208) is sleeved on the outer surface of the four connecting rods (207). One end of each of the four connecting rods (207) is fixedly connected to a first limiting plate (209).
2. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 1, characterized in that, The movable cylinder (205) is fixedly connected to one side of a first protective shell (210), and a second protective shell (211) is slidably connected to the inner wall of the first protective shell (210). The connecting rod (207) and the first spring (208) are both located inside the first protective shell (210) and the second protective shell (211).
3. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 1, characterized in that, Four rubber rings (212) are provided between one side of the first limiting plate (209) and the outer surface of the pressure relief cylinder (201). The outer surfaces of the four rubber rings (212) are fixedly connected to the outer surface of the pressure relief cylinder (201), and the inner sides of the four rubber rings (212) are sleeved on the outer surfaces of the four connecting rods (207).
4. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 1, characterized in that, The outer surface of the pressure relief cylinder (201) is fixedly connected to a first connecting ring (213), a first L-shaped block (214) is fixedly connected to one side of the first connecting ring (213), a second L-shaped block (215) is fixedly connected to the other side of the first connecting ring (213), a first connecting strip (216) is fixedly connected to the bottom of the first L-shaped block (214) and the second L-shaped block (215), and the outer surface of the first connecting strip (216) is fixedly connected to the outer surface of the base (102).
5. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 1, characterized in that, The reflux mechanism (3) includes a first reflux cylinder (301) fixedly connected to the other side of the pump body (101). An expansion cylinder (302) is fixedly connected to one side of the first reflux cylinder (301), and a second reflux cylinder (303) is fixedly connected to one side of the expansion cylinder (302). The expansion cylinder (302) is disposed between the first reflux cylinder (301) and the second reflux cylinder (303). A flow-limiting plate (304) is provided inside the second reflux cylinder (303). A water-passing plate (306) is fixedly connected to the inner wall of the first reflux cylinder (301). The flow-limiting plate (304) and the water-passing plate (306) are connected together. A slide rod (305) is provided between the expansion cylinder (302) and the expansion cylinder (302). One end of the slide rod (305) is fixedly connected to the outer surface of the flow limiting plate (304). The other end of the slide rod (305) passes through the outer surface of the water passage plate (306) and is fixedly connected to a second limiting plate (307). A second spring (308) is fixedly connected between the flow limiting plate (304) and the water passage plate (306). The inner side of the second spring (308) is sleeved on the outer surface of the slide rod (305). Several liquid passage holes (309) are opened inside the water passage plate (306) for liquid discharge during reflux.
6. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 5, characterized in that, The inner wall of the flow limiting plate (304) is slidably connected with four limiting rods (310). One end of each of the four limiting rods (310) is fixedly connected to the outer surface of the water flow plate (306), and the other end of each of the four limiting rods (310) is fixedly connected to a fixing plate (311).
7. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 5, characterized in that, The flow limiting plate (304) is fixedly connected to four protective arc plates (312) on the side near the water passage plate (306). The water passage plate (306) is provided with arc grooves (313) that match the outer surfaces of the four protective arc plates (312). One end of each of the four protective arc plates (312) is fixedly connected to a limiting ring (314), and the outer surface of the limiting ring (314) is in contact with the outer surface of the water passage plate (306).
8. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 5, characterized in that, The side of the second return cylinder (303) away from the pump body (101) is fixedly connected to a liquid passage pipe (315) for returning liquid. The end of the liquid passage pipe (315) away from the second return cylinder (303) is fixedly connected to the bottom of the pressure relief cylinder (201).
9. The chemical leakage-free pump with pressure self-adaptive adjustment function according to claim 5, characterized in that, A second connecting ring (316) is fixedly connected to the outer surface of the second reflux cylinder (303). A third L-shaped block (317) is fixedly connected to one side of the second connecting ring (316), and a fourth L-shaped block (318) is fixedly connected to the other side of the second connecting ring (316). A second connecting strip (319) is fixedly connected to the bottom of the third L-shaped block (317) and the fourth L-shaped block (318). The outer surface of the second connecting strip (319) is fixedly connected to the outer surface of the base (102).