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CN-224214332-U - Pneumatic diaphragm pump liquid level intelligent start-stop device

CN224214332UCN 224214332 UCN224214332 UCN 224214332UCN-224214332-U

Abstract

The utility model discloses an intelligent starting and stopping device for a liquid level of a pneumatic diaphragm pump, and belongs to the technical field of fluid mechanical control. Aiming at the problems of poor adaptability to explosive environment, complex control structure and the like existing in the prior pneumatic diaphragm pump adopting electric control, a pure pneumatic control scheme based on pneumatic interlocking is innovatively provided. The device structure comprises a box body module, a main gas path control module, a liquid level sensing module and a gas pressure logic control module. The box body module is of an explosion-proof closed structure, the main gas circuit control module adopts a gas control valve, the throttle valve extends out of an operating handle outside the shell to control, the liquid level sensing module adopts a high-water-level floating ball assembly and a low-water-level floating ball assembly to realize water level sensing, and the gas pressure logic control module adopts a two-position five-way gas control valve, a pipe fitting and the rest module to realize gas pressure logic control. The utility model adopts the full pneumatic element to construct the control logic, and realizes the self-adaptive control of the liquid level interval through the pneumatic self-holding mechanism.

Inventors

  • ZHOU LIGANG
  • DONG LONGSHENG

Assignees

  • 斯凯力流体科技(浙江)有限公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (7)

  1. 1. The intelligent liquid level start-stop device of the pneumatic diaphragm pump is characterized by comprising a box module, a main gas circuit control module, a liquid level sensing module and a pneumatic logic control module, wherein the box module adopts an explosion-proof closed structure and comprises an integrally formed aluminum alloy shell (1) and a detachable cover plate (2), and the shell is provided with a standardized gas circuit interface group which comprises a ball valve mounting hole (101), a throttle valve mounting hole (102) and a plurality of groups of fast-plug gas circuit connectors (103-106); The main gas circuit control module comprises a three-way ball valve (3), an adjustable throttle valve (4), a pneumatic control valve (5), a pipe fitting (11) and a gas pipe joint assembly (12), wherein the three-way ball valve (3) is arranged inside a shell (1), an operating handle of the three-way ball valve extends to the outside of the shell and is fixed through a narrow nut (7), the adjustable throttle valve (4) is arranged inside the shell (1), an adjusting knob of the adjustable throttle valve extends to the outside of the shell (1) and is axially fixed with the shell (1) through the narrow nut (7), and the pneumatic control valve (5) is normally closed and is directly integrated at a main gas circuit inlet of the diaphragm pump through a quick-plug interface; The liquid level sensing module comprises a high-water-level floating ball assembly (8), a low-water-level floating ball assembly (9) and a pipe fitting (11), wherein the high-water-level floating ball assembly (8) and the low-water-level floating ball assembly (9) are arranged outside through the pipe fitting (11) and used for detecting the liquid level of measured fluid, the air pressure logic control module comprises a two-position five-way air control valve (6), a normally open control signal port is connected with an output air passage of the high-water-level floating ball assembly (8), and a normally closed control signal port is connected with an output air passage of the low-water-level floating ball assembly (9).
  2. 2. The intelligent starting and stopping device for the liquid level of the pneumatic diaphragm pump is characterized in that a ball valve mounting hole (101) is formed in a middle upper portion of a main view plane of the box module, a throttle valve mounting hole (102) is formed in the right lower side of the ball valve mounting hole (101), and quick-plug type air passage connectors (103-106) are formed in four holes in the bottom.
  3. 3. The intelligent starting and stopping device for the liquid level of the pneumatic diaphragm pump according to claim 1, wherein the main gas path control module is connected through a pipe fitting (11), and the inside and the outside of the shell (1) of the narrow nut (7) are respectively fixed in an axial direction.
  4. 4. The intelligent starting and stopping device for the liquid level of the pneumatic diaphragm pump is characterized in that the detachable cover plate (2) comprises four shell mounting holes and four box mounting holes.
  5. 5. The intelligent starting and stopping device for the liquid level of the pneumatic diaphragm pump is characterized in that the four fast-plug air channel connectors (103-106) are an air inlet (103) of a pneumatic control system, a pilot interface (104) of a pump air control valve, a high liquid level immersed tube connector (105) and a low liquid level immersed tube connector (106) from left to right.
  6. 6. The intelligent start-stop device for the liquid level of the pneumatic diaphragm pump according to claim 1, wherein the floating ball is vertically placed in the liquid to be tested, and the start-stop of the pneumatic pump body is controlled by pressure difference formed by surface contact.
  7. 7. The intelligent starting and stopping device for the liquid level of the pneumatic diaphragm pump is characterized in that a logic control module is connected with a three-way ball valve (3) through an air pipe, and an operating handle of the intelligent starting and stopping device can manually start the pump body, stop the pump body and automatically start the pump body.

Description

Pneumatic diaphragm pump liquid level intelligent start-stop device Technical Field The utility model relates to the field of pneumatic diaphragm pump control, in particular to an intelligent liquid level starting and stopping device for a pneumatic diaphragm pump. Background The pneumatic diaphragm pump is a novel conveying machine, adopts compressed air as a power source, can pump and absorb all kinds of corrosive liquid, and has the characteristics of high viscosity, volatility, inflammability and high toxicity, is a novel conveying machine, is the most novel type of pump in China at present, can be widely applied to dangerous environments such as chemical industry, petroleum and the like due to the characteristics of no spark, corrosion resistance and the like, and has the problems that the traditional liquid level control is independent of electrical elements (such as an electromagnetic valve, a liquid level sensor and the like), the explosion prevention performance is insufficient, the electrical elements are easy to cause potential safety hazards in flammable and explosive environments, the control is complex, a controller, a circuit protection device and a system are required to be additionally arranged, the system integration level is low, the energy consumption is high, the frequent start and stop cause the air pressure loss, and the long-term operation failure rate of the electrical elements is high. For this reason, a solution for adaptive control of the liquid level based on pure pneumatic elements is needed to solve the above-mentioned problems. Disclosure of Invention Aiming at the defects of the prior art, the utility model provides an intelligent starting and stopping device for the liquid level of a pneumatic diaphragm pump, which realizes the control of the liquid level interval and the starting and stopping of a pump body by mechanically shifting a linkage pneumatic control valve group, and the specific scheme is as follows: The system comprises a box module, wherein the box module adopts an explosion-proof type closed structure, is installed by using four shell installation holes and four box installation holes, the module comprises an integrated aluminum alloy shell (1) and a detachable cover plate (2), the shell (1) is provided with a standardized air passage interface group, the standardized air passage interface group comprises a front view surface middle part upper hole-ball valve installation hole (101), a throttle valve installation hole (102) is arranged on the right lower side of the ball valve installation hole (101), and quick-plug air passage interfaces (103-106) are arranged on the four holes on the bottom, and a control system air inlet (103), a pump air control valve pilot interface (104), a high liquid level immersed tube interface (105) and a low liquid level immersed tube interface (106) are sequentially arranged on the four holes on the bottom from left to right. The main gas circuit control module comprises a three-way ball valve (3), an adjustable throttle valve (4) and a gas control valve (5), wherein the three-way ball valve (3) is fixed in a shell (1) through a narrow nut (7), an operating handle of the three-way ball valve extends to the outside and supports manual start-stop and mode switching, the operating handle of the adjustable throttle valve (4) is axially fixed with the inside and the outside of the shell (1) through the narrow nut (7), an adjusting knob is used for adjusting the flow of the main gas circuit, and the gas control valve (5) is directly connected with a main gas circuit inlet of a diaphragm pump through a quick-plug interface. The liquid level sensing module comprises a high-level floating ball assembly (8), a low-level floating ball assembly (9) and a connecting pipe fitting (11), wherein the floating ball is vertically arranged in the liquid to be measured, the on-off state of a gas path is changed by detecting the liquid level change of the fluid, a normally open control signal port of the two-position five-way air control valve (6) forms a closed air pressure signal when detecting that the high-position floating ball is closed through an air pipe assembly, and the gas path is decompressed when detecting that the low-position floating ball is opened through the air pipe assembly. The core of the air pressure logic control module is a two-position five-way air control valve (6), the air pipe joint assembly (12) is connected with the normally open control port to the output air passage of the high water level floating ball assembly, the normally closed control port to the output air passage of the low water level floating ball assembly, and the on-off state of the main air passage is switched through an air pressure signal. The working principle is that the liquid level is stopped at a low position, when the liquid level is lower than the low water level floating ball component (9), the output gas circuit is decompressed, the two-position