High-strength explosion-proof shield pump

Abstract

The invention relates to the field of shield pump explosion prevention, and discloses a high-strength explosion-proof shield pump which comprises a shield pump body and a base mechanism arranged below the shield pump body, the base mechanism comprises a connecting assembly arranged below the shield pump body, and a bottom plate assembly is arranged below the connecting assembly; a plurality of sets of swing assemblies are arranged on the upper portion of the interior of the bottom plate assembly, a plurality of sets of mounting assemblies are arranged on the two sides of the interior of the bottom plate assembly, and a pipeline assembly is arranged on the lower portion of the interior of the bottom plate assembly. At least one group of pendulum bobs resonate with the current vibration frequency of the shield pump, so that a relatively large swing amplitude is obtained, the swing efficiency of other pendulum bobs is different from that of the resonant pendulum bobs, a plurality of formants possibly generated by the pump body can be inhibited, and damages such as flange connecting bolt loosening and sealing gasket fatigue failure caused by resonance of the shield pump are prevented.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof technology for canned pumps, specifically a high-strength explosion-proof canned pump. Background Technology

[0002] The patent application with publication number CN207315678U includes a vent valve, an upper bearing, an upper stator plate, an upper sheath, an upper rotor plate, an upper thrust plate, a stator, a rotor, a stator shielding sleeve, a circulating water pipe, a rotor shielding sleeve, a lower stator plate, a lower thrust plate, a lower bearing, a connecting plate, an impeller back ring, a filter screen, a pump body, a shaft, an impeller, a waterproof valve, and a pressure gauge interface. The pressure gauge interface is connected to one end of the pump body, and the filter screen is connected to the other end of the pump body. The waterproof valve is located on one side of the pressure gauge interface, which is below the impeller. The impeller is connected to the shaft, which is located on one side of the impeller back ring. The impeller back ring is connected to the connecting plate, which is located on one side of the lower bearing. The lower bearing is connected to the lower thrust plate. This application allows for one-piece molding of the stator plate, resulting in high production efficiency, convenient and quick assembly, and reusability.

[0003] In the aforementioned patents, some existing equipment still has shortcomings in actual operation. Some canned pumps generate broadband vibrations during operation, and multiple resonance peaks may occur due to changes in operating conditions. The vibration reduction structure is usually optimized only for a single frequency, which is difficult to effectively suppress broadband vibrations and may even aggravate resonance at non-design frequency points. Resonance can lead to damage such as loose flange connection bolts, fatigue failure of sealing gaskets, and cracks in welded parts. For canned pumps that transport flammable and explosive media, once the dangerous media leaks, it is very easy to cause an explosion accident when it encounters high bearing temperature, friction sparks or static electricity. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength explosion-proof shielded pump to solve the problems mentioned in the background art.

[0005] To solve the above technical problems, the technical solution of the present invention is: a high-strength explosion-proof shielded pump, including a shielded pump body and a base mechanism disposed below the shielded pump body. The base mechanism includes a connecting component disposed below the shielded pump body, a base plate assembly disposed below the connecting component, multiple sets of swing components disposed above the interior of the base plate assembly, multiple sets of mounting components disposed on both sides of the interior of the base plate assembly, and a pipe assembly disposed below the interior of the base plate assembly. The connecting assembly includes a connecting plate, with two grooves on each side of the connecting plate and two guide grooves on each side of the connecting plate. Each groove is adjacent to each guide groove, and a cavity is formed inside the connecting plate.

[0006] Preferably, the swing assembly includes a connecting block fixedly connected to the upper part of the cavity, a rotating rod rotatably connected below the connecting block, a connecting crossbar fixedly connected to the lower end of the rotating rod, hemispherical blocks fixedly connected to both ends of the connecting crossbar, and a weight-reducing cavity opened inside the connecting crossbar.

[0007] Preferably, the weight-reducing cavity in each set of connecting crossbars has a different size.

[0008] Preferably, the mounting assembly includes connecting rings fixedly connected to both sides inside the cavity, a rubber membrane fixedly connected to the side of the connecting ring away from the inner wall of the connecting ring, and a connecting bend provided on the inner wall of the cavity at a position corresponding to the connecting ring.

[0009] Preferably, the connecting bends in each group have different diameters.

[0010] Preferably, the pipe assembly includes a main pipe located inside and below the connecting plate, the main pipe being connected to multiple sets of connecting bends, and multiple irregularly shaped pipes being provided on the outer side of the inner wall of the main pipe, with sliding plugs slidably disposed inside the irregularly shaped pipes.

[0011] Preferably, the base plate assembly includes a connecting base plate, a rubber pad is provided on the top of the connecting base plate, four guide rods corresponding to the guide grooves are fixedly connected to the upper end of the connecting base plate, and multiple mounting rods are fixedly connected to the lower end of the connecting base plate.

[0012] Preferably, the surface of the mounting rod is provided with multiple irregular grooves.

[0013] Preferably, the shielded pump body is provided with a circulation pipe on the outside, a liquid outlet is provided on the top of the shielded pump body, one end of the circulation pipe is connected to the liquid outlet, a liquid inlet is provided on one side of the shielded pump body, and two support plates are fixedly provided below the shielded pump body.

[0014] Preferably, the support plate is fixedly connected to the upper end of the connecting plate.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) This application uses multiple sets of swing components, each set of swing components including a connecting block, a rotating rod, a connecting crossbar and hemispherical blocks at both ends, to form a pendulum structure. The size of the weight reduction cavity inside each connecting crossbar is different, so that the mass of each pendulum is different, thus corresponding to different resonance frequencies. When the shielded pump is running, the generated vibration frequency will cover a wide range, and multiple resonance peaks will appear due to changes in working conditions. Traditional vibration reduction structures are usually only optimized for a single frequency and cannot effectively suppress wide-frequency vibration. On the contrary, they may aggravate resonance at non-design frequency points. By using multiple pendulums of different masses, each corresponding to a different natural frequency, when the vibration frequency of the shielded pump is close to the natural frequency of a certain pendulum, the pendulum... The hammers oscillate with a large amplitude, dissipating vibration energy through impact with the rubber diaphragm and liquid damping mechanism. Multiple hammers together cover a wide frequency range, achieving energy dissipation near multiple potential resonance frequency points. This effectively suppresses multiple resonance peaks that may be generated in the pump body, preventing damage to the canned pump caused by resonance, such as loosening of flange connection bolts, fatigue failure of sealing gaskets, and cracks in welded parts. For canned pumps that transport flammable and explosive media, the above situations can lead to leakage of dangerous media, which may cause an explosion accident when exposed to high bearing temperature, friction sparks, or static electricity. This invention eliminates the dangerous working conditions of ignition sources and leaked media caused by resonance through wide-frequency resonance suppression. (2) In this application, a liquid chamber is formed by the connecting ring and the rubber membrane in the installation assembly. Each chamber is connected to the main pipeline through connecting bends of different diameters. Multiple irregularly shaped pipes are connected in parallel outside the main pipeline. Each irregularly shaped pipe is slidably equipped with a sliding block to separate the irregularly shaped pipe into a liquid side and a gas side. Different connecting bends have different diameters, corresponding to different liquid flow resistances. When the vibration of the shielded pump is transmitted to the connecting plate, the pendulums of different masses swing at different amplitudes and frequencies, squeezing their respective rubber membranes. Due to the different diameters of the connecting bends, the liquid flow resistance of some chambers is relatively large. This limits the rotation angle of the corresponding pendulum, thus creating different damping forces. When the liquid pressure in a certain connecting bend increases due to the compression of the rubber diaphragm, the liquid pushes the sliding block deeper into the irregular pipe, compressing the air behind it and converting the vibration energy into the internal energy of the air, which is then gradually dissipated through heat conduction. When the rubber diaphragm rebounds and the pressure decreases, the liquid flows back from the main pipe, the sliding block resets, and a cycle of energy dissipation is completed. When the vibration amplitude increases, the liquid pressure fluctuations are more intense, the stroke of the sliding block increases, the amount of gas compression increases, and the energy consumption increases. Conversely, when the vibration is weak, the energy consumption decreases. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the canned pump body structure of the present invention; Figure 3 This is a schematic diagram of the base mechanism of the present invention; Figure 4 This is a schematic diagram of the connection component structure of the present invention; Figure 5 This is a schematic diagram of the connection component, swing component, mounting component, and pipe component of the present invention; Figure 6 This is a schematic diagram of the swing component structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the swing assembly of the present invention; Figure 8 This is a schematic diagram of the installation component structure of the present invention; Figure 9 This is a schematic diagram of the pipe assembly structure of the present invention; Figure 10 This is a schematic diagram of the base plate assembly structure of the present invention.

[0017] In the diagram: 1. Shielded pump body; 11. Circulation pipe; 12. Support plate; 13. Inlet; 14. Outlet; 2. Base mechanism; 21. Connecting assembly; 211. Connecting plate; 212. Groove; 213. Guide groove; 214. Cavity; 22. Base plate assembly; 221. Connecting base plate; 222. Rubber pad; 223. Guide rod; 224. Mounting rod; 23. Swing assembly; 231. Connecting block; 232. Rotating rod; 233. Connecting crossbar; 234. Hemispherical block; 235. Weight reduction chamber; 24. Mounting assembly; 241. Connecting ring; 242. Rubber diaphragm; 243. Connecting bend; 25. Pipe assembly; 251. Main pipe; 252. Irregular pipe; 253. Sliding plug. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0020] like Figures 1 to 10 As shown, the present invention provides a high-strength explosion-proof shielded pump, including a shielded pump body 1 and a base mechanism 2 disposed below the shielded pump body 1. The base mechanism 2 includes a connecting component 21 disposed below the shielded pump body 1, a base plate component 22 disposed below the connecting component 21, multiple sets of swing components 23 disposed above the interior of the base plate component 22, multiple sets of mounting components 24 disposed on both sides of the interior of the base plate component 22, and a pipe component 25 disposed below the interior of the base plate component 22. The connecting component 21 includes a connecting plate 211, with two grooves 212 and two guide grooves 213 on each side of the connecting plate 211. Each groove 212 is adjacent to each guide groove 213, and a cavity 214 is formed inside the connecting plate 211.

[0021] The swing assembly 23 includes a connecting block 231 fixedly connected to the upper part of the cavity 214. A rotating rod 232 is rotatably connected below the connecting block 231. A connecting crossbar 233 is fixedly connected to the lower end of the rotating rod 232. Hemispherical blocks 234 are fixedly connected to both ends of the connecting crossbar 233. A weight-reducing cavity 235 is opened in the connecting crossbar 233. The connecting crossbar 233 and the two hemispherical blocks 234 constitute a pendulum.

[0022] The weight-reducing cavity 235 inside each of the connecting crossbars 233 is of a different size, so the weight of each connecting crossbar 233 is different.

[0023] The mounting assembly 24 includes a connecting ring 241 fixedly connected to both sides inside the cavity 214. A rubber membrane 242 is fixedly connected to the side of the connecting ring 241 away from the inner wall of the connecting ring 241. A connecting bend 243 is provided on the inner wall of the cavity 214 at a position corresponding to the connecting ring 241.

[0024] The connecting bends 243 described in each group have different diameters.

[0025] The pipe assembly 25 includes a main pipe 251 located inside and below the connecting plate 211, and the main pipe 251 is connected to multiple sets of connecting bends 243. Multiple irregular pipes 252 are provided on the outer side of the inner wall of the main pipe 251, and sliding blocks 253 are slidably provided in the irregular pipes 252. Each sliding block 253 divides each irregular pipe 252 into two spaces. Liquid is provided in the connecting ring 241, rubber membrane 242, connecting bends 243 and the main pipe 251, and liquid is also provided in the part where the irregular pipes 252 are connected to the main pipe 251.

[0026] The base plate assembly 22 includes a connecting base plate 221, a rubber pad 222 is provided on the top of the connecting base plate 221, four guide rods 223 corresponding to the guide grooves 213 are fixedly connected to the upper end of the connecting base plate 221, and multiple mounting rods 224 are fixedly connected to the lower end of the connecting base plate 221.

[0027] The surface of mounting rod 224 has multiple irregular grooves.

[0028] A circulation pipe 11 is provided on the outside of the pump body 1 of the shielded pump. An outlet 14 is provided on the top of the pump body 1 of the shielded pump. One end of the circulation pipe 11 is connected to the outlet 14. An inlet 13 is provided on one side of the pump body 1 of the shielded pump. Two support plates 12 are fixedly provided on the bottom of the pump body 1 of the shielded pump.

[0029] The support plate 12 is fixedly connected to the upper end of the connecting plate 211.

[0030] The working principle of this invention: During use, the shielded pump body 1 is fixed to the upper end of the connecting plate 211 via the support plate 12. The vibration of the shielded pump body 1 is directly transmitted to the connecting plate 211. In the cavity 214 inside the connecting plate 211, multiple sets of swing components 23 suspend the rotating rod 232 and the connecting crossbar 233 via the connecting block 231. The size of the weight-reducing cavity 235 inside each connecting crossbar 233 is different, so the mass of each connecting crossbar 233 plus the hemispherical block 234 is different, and therefore their natural frequencies are different. The connecting crossbars 233 of different masses have different natural frequencies. 33 and hemispherical block 234 can correspond to different broadband vibrations generated by the pump body 1 of the canned pump. At least one set of connecting crossbar 233 and hemispherical block 234 resonates with the pump body 1 of the canned pump, thereby obtaining a larger swing amplitude and impact force. Due to the different masses of the pendulums, multiple pendulums cover a wider frequency range together, which can effectively suppress multiple resonance peaks that may be generated by the pump body, prevent the resonance of the pump body 1 from causing flammable and explosive media to leak from loose flanges and fatigue cracks. On the other hand, it eliminates ignition sources such as high bearing temperature and friction sparks caused by resonance. When the hemispherical blocks 234 at both ends of each pendulum swing, they will impact and squeeze the corresponding rubber diaphragm 242. When the rubber diaphragm 242 is squeezed, the liquid in the connecting ring 241 is squeezed and the pressure increases. When the pendulum stops squeezing the rubber diaphragm 242, the volume of the liquid in the connecting ring 241 increases and the pressure decreases. The diameter of each set of connecting bends 243 is different, so the corresponding liquid flow resistance is different, which will limit the rotation angle of some pendulums. When the liquid pressure in a certain connecting bend 243 increases, the liquid pushes the sliding block 253 to move deeper into the irregular pipe 252. The air behind the sliding block 253 is compressed and the pressure increases. When the pressure decreases, the pressure in the connecting ring 241 decreases and liquid is drawn from the main pipe 251 through the connecting bend 243, which lowers the pressure in the main pipe 251 and causes the sliding block 253 to reset, converting the vibration of the shielded pump into the flow of liquid. The base plate assembly 22 is engaged with the guide groove 213 of the connecting plate via the guide rod 223 to achieve vertical positioning. The rubber pad 222 is used to absorb residual vibration and prevent rigid impact. The irregular grooves on the surface of the mounting rod 224 increase the mechanical locking force with the casting material.

[0031] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A high-strength explosion-proof shielded pump, comprising a shielded pump body (1) and a base mechanism (2) disposed below the shielded pump body (1), characterized in that: The base mechanism (2) includes a connecting component (21) disposed below the shielded pump body (1), a base plate assembly (22) disposed below the connecting component (21), a plurality of swing components (23) disposed above the interior of the base plate assembly (22), a plurality of mounting components (24) disposed on both sides of the interior of the base plate assembly (22), and a pipe assembly (25) disposed below the interior of the base plate assembly (22). The connecting assembly (21) includes a connecting plate (211), two grooves (212) are respectively opened on both sides of the connecting plate (211), two guide grooves (213) are respectively opened on both sides of the connecting plate (211), each groove (212) is adjacent to each guide groove (213), and a cavity (214) is opened in the connecting plate (211).

2. The high-strength explosion-proof shielded pump according to claim 1, characterized in that: The swing assembly (23) includes a connecting block (231) fixedly connected to the upper part of the cavity (214), a rotating rod (232) rotatably connected below the connecting block (231), a connecting crossbar (233) fixedly connected to the lower end of the rotating rod (232), a hemispherical block (234) fixedly connected to both ends of the connecting crossbar (233), and a weight reduction cavity (235) opened inside the connecting crossbar (233).

3. A high-strength explosion-proof shielded pump according to claim 2, characterized in that: The weight-reducing cavity (235) in each of the connecting crossbars (233) has a different size.

4. A high-strength explosion-proof shielded pump according to claim 3, characterized in that: The mounting assembly (24) includes a connecting ring (241) fixedly connected to both sides inside the cavity (214). A rubber membrane (242) is fixedly connected to the side of the connecting ring (241) away from the inner wall of the connecting ring (241). A connecting bend (243) is provided on the inner wall of the cavity (214) at the position corresponding to the connecting ring (241).

5. A high-strength explosion-proof shielded pump according to claim 4, characterized in that: The connecting bends (243) described in each group have different diameters.

6. A high-strength explosion-proof shielded pump according to claim 5, characterized in that: The pipe assembly (25) includes a main pipe (251) located inside and below the connecting plate (211). The main pipe (251) is connected to multiple sets of connecting bends (243). Multiple irregular pipes (252) are provided on the outer side of the inner wall of the main pipe (251). A sliding block (253) is slidably provided inside the irregular pipe (252).

7. A high-strength explosion-proof shielded pump according to claim 6, characterized in that: The base plate assembly (22) includes a connecting base plate (221), a rubber pad (222) is provided on the top of the connecting base plate (221), four guide rods (223) corresponding to the guide groove (213) are fixedly connected to the upper end of the connecting base plate (221), and multiple mounting rods (224) are fixedly connected to the lower end of the connecting base plate (221).

8. A high-strength explosion-proof shielded pump according to claim 7, characterized in that: The surface of the mounting rod (224) is provided with multiple irregular grooves.

9. A high-strength explosion-proof shielded pump according to claim 1, characterized in that: A circulation pipe (11) is provided on the outside of the shielded pump body (1), and an outlet (14) is provided on the top of the shielded pump body (1). One end of the circulation pipe (11) is connected to the outlet (14). An inlet (13) is provided on one side of the shielded pump body (1), and two support plates (12) are fixedly provided below the shielded pump body (1).

10. A high-strength explosion-proof shielded pump according to claim 9, characterized in that: The support plate (12) is fixedly connected to the upper end of the connecting plate (211).

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