Electric diaphragm pump capable of building pressure

Abstract

An electric diaphragm pump capable of building pressure comprises a pump body, a pump cavity, a feeding channel and a discharging channel are arranged in the pump body, the two ends of the feeding channel and the two ends of the discharging channel are communicated with each other, the communication state of the feeding channel and the two ends of the discharging channel are controlled through a one-way ball valve, and a reversing shaft capable of conducting left-right reciprocating motion in the pump cavity is arranged in the pump cavity. An outer diaphragm and an inner diaphragm are arranged on the two sides of the reversing shaft, the outer diaphragm and the inner diaphragm are connected in a sealed mode to form a pressure maintaining and controlling chamber, and the pressure maintaining and controlling chamber is communicated with the outside to release pressure when the discharging channel is in an abnormal state.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric diaphragm pumps that can hold pressure, belong to diaphragm pump field. BACKGROUND

[0002] Diaphragm pump is also called control pump, and it is the main type of actuator. It changes the flow of fluid by receiving the control signal output by the adjustment control unit and operating with power. The role of diaphragm pump in the control process is to receive the control signal of the regulator or computer, change the flow of the medium being adjusted, and maintain the parameter being adjusted within the required range, so as to achieve the automation of production process.

[0003] The existing electric diaphragm pump does not close the external motor when the discharge port is blocked, the pressure is held, the valve is closed, etc. The pressure in the pump continues to rise. The existing diaphragm pump may have problems such as diaphragm damage, material leakage, and motor burning, which is not conducive to the continuous use of the electric diaphragm pump, increases production cost, and affects production efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the shortcomings and deficiencies of the prior art, and provides an electric diaphragm pump that can hold pressure.

[0005] An electric diaphragm pump that can hold pressure includes a pump body. The pump body is provided with a pump cavity, a feed passage and a discharge passage. The two ends of the feed passage and the discharge passage are connected to each other, and the connection state is controlled by a one-way ball valve. The pump cavity is provided with a reversing shaft that can move left and right in the pump cavity. The reversing shaft is provided with an outer diaphragm and an inner diaphragm on both sides. The outer diaphragm and the inner diaphragm are sealed and connected to form a pressure maintaining and controlling chamber. The pressure maintaining and controlling chamber is provided with a pressure relief port. When the discharge passage produces an abnormal state, the pressure maintaining and controlling chamber is relieved by communicating with the outside. The material enters from the feed passage and is discharged from the discharge passage, realizing the material conveying work. When the discharge passage is blocked, the pressure is held, the valve is closed, etc. After the pressure is generated, the pressure maintaining and controlling chamber can maintain constant pressure without overpressure, effectively avoiding the problems such as diaphragm damage, material leakage and motor burning of the diaphragm pump.

[0006] Preferably, the pressure maintaining and controlling chamber is provided with a pressure relief port for communicating with the outside to relieve the pressure of the pressure maintaining and controlling chamber. The pressure relief port can be relieved by different kinds of pressure relief methods.

[0007] Preferably, the pressure relief interface can be connected to a pressure relief valve or an air compressor. The pressure relief valve can relieve pressure by pre-setting the pressure of the pressure maintaining and controlling chamber. The pressure relief valve can relieve pressure by pre-setting the pressure value of the pressure maintaining and controlling chamber, which can achieve accurate control of the pressure in the pump cavity, avoid equipment failure caused by excessive or insufficient pressure, and improve the stability and reliability of operation. The pressure relief interface is compatible with the connection of the pressure relief valve and the air compressor, so that the equipment can select the pressure relief mode according to the actual demand, adapt to different industrial scenes and complex working conditions, and improve the application range and flexibility of the equipment. In addition to the pressure relief valve and the air compressor, the pressure relief interface can also be connected to other devices for pressure relief.

[0008] Further, the pressure maintaining and controlling chamber is provided with a diaphragm damage early warning interface for checking the state of the diaphragm. The diaphragm damage early warning interface can monitor the running state of the diaphragm in real time, quickly issue an early warning signal when the diaphragm is damaged or abnormal, ensure that the problem is found and handled in the early stage, and avoid small failures developing into serious problems. The early warning interface can be connected with an intelligent control system to realize automatic monitoring and alarm functions, further improve the automation and intelligence level of the equipment, and reduce the monitoring pressure of the operator. Through effective monitoring of the diaphragm state, preventive maintenance measures can be taken before the diaphragm fails, reducing the damage caused by overload operation or sudden failure of the equipment, and prolonging the overall service life of the equipment.

[0009] Preferably, the reversing shaft drives the inner diaphragm to deform through reciprocating motion, and then the pressure maintaining and controlling chamber acts on the outer diaphragm, so that the volume of the pump cavity changes regularly, and the one-way ball valves at both ends of the feeding channel and the discharging channel are alternately opened or closed. The combination of the movement of the reversing shaft and the alternately opening or closing of the one-way ball valves makes the fluid flow process of the feeding channel and the discharging channel controllable, which helps to realize stable fluid delivery.

[0010] Further, the pump body is provided with an eccentric shaft for driving the reversing shaft to reciprocate, and the reversing shaft is provided with an exhaust port. The design of the exhaust port can effectively release the excessive pressure that may accumulate in the pump cavity during operation, further improve the safety of the equipment, and prevent failures or dangers caused by abnormal pressure. The function of timely exhaust can prevent failures caused by gas retention or pressure accumulation, such as pump body rupture or medium leakage, thereby improving the reliability and safety of equipment operation.

[0011] Preferably, a communication cavity is provided between the feeding channel and the discharging channel, and the outer diaphragm extends to the communication cavity so that the change of the outer diaphragm can act on the communication cavity to make the volume of the communication cavity change regularly. The design of the communication cavity makes the change of the outer diaphragm directly act on the cavity, and by controlling the regular change of the volume of the communication cavity, it helps to reduce the pressure fluctuation in the pump cavity, thereby realizing more stable fluid delivery.

[0012] Further, the feeding channel and the discharging channel are respectively provided with a feeding port and a discharging port.

[0013] The utility model discloses the beneficial effect is as follows: material enters from the feeding channel, and the material is discharged from the discharging channel, realizes material conveying work. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0015] Fig. 1 It is the main body structure schematic drawing of the utility model;

[0016] Fig. 2 It is the section view of A-A of the utility model;

[0017] In the drawing, 1, pump body;2, pump cavity;3, feeding channel;31, feeding port;4, discharging channel;41, communication chamber;42, discharging port;5, reversing shaft;51, exhaust port;6, outer diaphragm;7, inner diaphragm;8, pressure maintaining and pressure controlling chamber;81, pressure relief interface;82, diaphragm breakage early warning interface;9, eccentric shaft. DETAILED DESCRIPTION

[0018] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0019] It should be noted that all the "first" and "second" expressions used in the embodiments of the utility model are used to distinguish two same name different entities or different parameters, and "first" and "second" are only for the convenience of expression, and should not be understood as the limitation of the embodiments of the utility model, and subsequent embodiments will not be described one by one.

[0020] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] like Figs. 1-2 The illustration shows an embodiment of a pressure-controlled electric diaphragm pump according to this utility model. It includes a pump body 1, which contains a pump chamber 2, a feed channel 3, and a discharge channel 4. The feed channel 3 and the discharge channel 4 are interconnected at both ends and their connection is controlled by a one-way ball valve. The pump chamber 2 contains a reversing shaft 5 that can reciprocate left and right within the pump chamber 2. An outer diaphragm 6 and an inner diaphragm 7 are located on both sides of the reversing shaft 5. The outer diaphragm 6 and the inner diaphragm 7 are sealed together to form a pressure-holding and control chamber 8. The pressure-holding and control chamber 8 has a pressure relief port 81, which releases pressure by communicating with the outside when an abnormal condition occurs in the discharge channel 4. Material enters through the feed channel 3 and exits through the discharge channel 4, thus achieving material conveying. In cases of blockage, pressure buildup, or valve closure in the discharge channel 4, the pressure generated can be kept constant by the pressure-holding and control chamber 8, preventing overpressure and effectively avoiding diaphragm damage, leakage, and motor burnout in the diaphragm pump.

[0022] The pressure holding and control chamber 8 is provided with a pressure relief interface 81 for communicating with the outside to release pressure in the pressure holding and control chamber. The pressure relief interface can release pressure through different types of pressure relief methods.

[0023] The pressure relief port 81 can be connected to a pressure relief valve or an air compressor. The pressure relief valve releases pressure through a preset pressure-holding and control chamber 8. By releasing pressure through the preset pressure value of the pressure-holding and control chamber 8, the pressure relief valve can achieve precise control of the pressure within the pump chamber 2, avoiding equipment failures caused by excessively high or low pressure, and improving operational stability and reliability. The pressure relief port 81 is compatible with both pressure relief valves and air compressors, allowing the equipment to select the pressure relief method according to actual needs, adapting to different industrial scenarios and complex working conditions, thus improving the applicability and flexibility of the equipment. Besides pressure relief valves and air compressors, the pressure relief port 81 can also connect to other devices used for pressure relief.

[0024] The reversing shaft 5, through its reciprocating motion, causes the inner diaphragm 7 to deform, which in turn acts on the outer diaphragm 6 via the pressure-holding and control chamber 8. This causes a regular change in the volume within the pump chamber 2, controlling the alternating opening and closing of the one-way ball valves at both ends of the feed channel 3 and the discharge channel 4. The combination of the movement of the reversing shaft 5 and the alternating opening and closing of the one-way ball valves ensures precise and controllable fluid flow in the feed and discharge channels 4, contributing to stable fluid delivery.

[0025] The pump body 1 is provided with an eccentric shaft 9 for driving the reciprocating movement of the reversing shaft 5, and the reversing shaft 5 is provided with an exhaust port 51. The exhaust port 51 is designed to effectively release the excessive pressure that may accumulate in the pump cavity 2 during operation, further improving the safety of the equipment and preventing failures or dangers caused by abnormal pressure. The timely exhaust function can prevent failures caused by gas retention or pressure accumulation, such as pump body 1 rupture or medium leakage, thereby improving the reliability and safety of the equipment operation.

[0026] The feed channel 3 and the discharge channel 4 are provided with a communication cavity 41, and the outer diaphragm 6 extends to the communication cavity 41, so that the change of the outer diaphragm 6 can act on the communication cavity 41, and the volume of the communication cavity 41 changes regularly. The design of the communication cavity 41 enables the change of the outer diaphragm 6 to directly act on the cavity, and by controlling the regular change of the volume of the communication cavity 41, it helps to reduce the pressure fluctuation in the pump cavity 2, thereby realizing more stable fluid delivery.

[0027] The feed channel 3 and the discharge channel 4 are respectively provided with a feed port 31 and a discharge port 42. The design of the independent feed port 31 and the discharge port 42 not only facilitates the delivery of materials, but also facilitates the expansion of other functions, such as the addition of filtering devices, flow meters or regulating valves, etc., further improving the intelligence and functionality of the pump.

[0028] The difference between the present embodiment and the above-mentioned embodiments is that the pressure maintaining and pressure controlling chamber 8 is provided with a diaphragm damage early warning interface 82 for checking the diaphragm state. The diaphragm damage early warning interface 82 can monitor the running state of the diaphragm in real time, and quickly send an early warning signal when the diaphragm is damaged or abnormal, ensuring that the problem is discovered and handled in the early stage, avoiding the development of small faults into serious problems. The early warning interface 82 can be connected with an intelligent control system to realize automatic monitoring and alarm function, further improving the automation and intelligence level of the equipment and reducing the monitoring pressure of the operator. Through effective monitoring of the diaphragm state, preventive maintenance measures can be taken before the diaphragm fails, reducing the damage caused by overload operation or sudden failure of the equipment, and prolonging the overall service life of the equipment.

[0029] The above disclosure is only the preferred embodiment of the utility model, of course, cannot limit the right range of the utility model by this, therefore, the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

[0030] Although the utility model has been described with reference to a number of specific embodiments, it should be understood that the utility model is not limited to the disclosed specific embodiments. The utility model is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A pressure-reducing electric diaphragm pump, characterized in that: The pump includes a pump body, which has a pump chamber, a feed channel, and a discharge channel. The two ends of the feed channel and the discharge channel are interconnected and their connection is controlled by a one-way ball valve. The pump chamber has a reversing shaft that can reciprocate left and right within the pump chamber. The reversing shaft has an outer diaphragm and an inner diaphragm on both sides. The outer diaphragm and the inner diaphragm are sealed together to form a pressure-holding and pressure-controlling chamber. When an abnormal state occurs in the discharge channel, the pressure-holding and pressure-controlling chamber releases pressure by communicating with the outside.

2. The pressurizable electric diaphragm pump as described in claim 1, characterized in that: The pressure-holding and pressure-controlling chamber is equipped with a pressure relief port for connecting to the outside to release pressure in the pressure-holding and pressure-controlling chamber.

3. The pressurizable electric diaphragm pump as described in claim 2, characterized in that: The pressure relief port can be connected to a pressure relief valve or an air compressor. The pressure relief valve releases pressure through the pressure of a preset pressure-holding and control chamber.

4. The pressure-reducing electric diaphragm pump as described in claim 1 or 2, characterized in that: The pressure holding and control chamber is equipped with a diaphragm damage early warning interface for checking the diaphragm condition.

5. The pressurizable electric diaphragm pump as described in claim 1, characterized in that: The reversing shaft drives the inner diaphragm to deform through reciprocating motion, which in turn acts on the outer diaphragm through the pressure holding and control chamber, causing the volume in the pump chamber to change regularly, and controlling the one-way ball valves at both ends of the feed channel and the discharge channel to open or close alternately.

6. The pressurizable electric diaphragm pump as described in claim 5, characterized in that: The pump body is provided with an eccentric shaft for driving the reciprocating motion of the reversing shaft, and an exhaust port is provided at the reversing shaft.

7. The pressurizable electric diaphragm pump as described in claim 1, characterized in that: A connecting cavity is provided between the feeding channel and the discharging channel. The outer diaphragm extends into the connecting cavity so that changes in the outer diaphragm can act on the connecting cavity, causing the volume of the connecting cavity to change in a regular manner.

8. The pressure-resistant electric diaphragm pump as described in claim 1 or 7, characterized in that: The feeding channel and the discharging channel are respectively provided with a feeding port and a discharging port.

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