An energy-saving high-pressure pneumatic diaphragm pump

Abstract

The present invention relates to the technical field of diaphragm pumps, and in particular to an energy-saving high-pressure pneumatic diaphragm pump, comprising an air intake assembly, a first flexible hose, a boosting module, a connecting tee, a second flexible hose, an L-shaped support plate and a diaphragm pump body. The boosting module is integrated on the diaphragm pump body through the L-shaped support plate and corresponding pipelines, thereby shortening the high-pressure transmission distance and reducing the loss. The diaphragm pump has the advantages of simple structure, small size and high pneumatic efficiency. A cylinder drive is used in the boosting module, and high and low air sources are automatically switched through piston movement. The pump integrates the dual functions of an ordinary isobaric diaphragm pump and a boosting diaphragm pump. The output pressure can also be adjusted and controlled by a back pressure valve, thereby solving the technical problem that the output pressure of the isobaric diaphragm pump in the existing diaphragm pumps in the filter press industry is insufficient, and the boosting diaphragm pump cannot directly pump materials at the primary pressure.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm pumps, and in particular to an energy-saving high-pressure pneumatic diaphragm pump. Background Art

[0002] Pneumatic diaphragm pumps are used in industries such as filtration and purification. The pressure required by general filtration equipment is generally 1.6Mpa. The general compressed air pressure in industry is around 0.8Mpa. In a typical filtration cycle, the initial stage of filtration requires a large output flow rate of the pump, that is, low pressure; while in the middle and final stages of filtration, the output pressure of the pump is high. Ordinary diaphragm pumps are generally isobaric pumps, which do not have a pressure boosting function, and are difficult to use due to low efficiency and low pressure.

[0003] The solution to this problem is to use a booster diaphragm pump, using the built-in group of diaphragms as a booster cylinder to pressurize the primary compressed gas to a secondary high pressure before pumping, and at the same time upgrade the entire primary gas source to a 1.6Mpa compressor and pump it with an isobaric diaphragm pump. However, in the low-pressure injection stage, high pressure is not necessary. High pressure means high loss and high energy consumption. In addition, the entire gas pipeline facility needs to be upgraded for local high pressure, which is not only large in size but also cannot be integrated and miniaturized, and the cost increases dramatically and the energy consumption is also high. Summary of the invention

[0004] The purpose of the present invention is to provide an energy-saving high-pressure pneumatic diaphragm pump, aiming to solve the technical problems that the output pressure of the isobaric diaphragm pump in the existing diaphragm pumps in the filter press industry is insufficient, and the booster diaphragm pump cannot achieve the primary pressure to directly pump materials.

[0005] To achieve the above-mentioned objectives, the present invention provides an energy-saving high-pressure pneumatic diaphragm pump, comprising an air intake assembly, a first flexible hose, a boosting module, a connecting tee, a second flexible hose, an L-shaped support plate and a diaphragm pump body, the air intake assembly and the connecting tee are threadedly connected, one end of the first flexible hose is fixedly connected to the air intake assembly, the other end of the first flexible hose is fixedly connected to the boosting module, both ends of the second flexible hose are respectively fixedly connected to the boosting module and the connecting tee, the L-shaped support plate is fixedly connected to the diaphragm pump body and is located above the diaphragm pump body, and the boosting module is arranged on the L-shaped support plate.

[0006] The boost module is fixedly mounted above the diaphragm pump body via an L-shaped support plate, and is connected and integrated with the isolation pump body via a first flexible hose, a second flexible hose and a connecting tee, thereby shortening the high-pressure transmission distance, reducing losses, having a simple structure, a small size and high pneumatic efficiency.

[0007] Among them, the air intake component includes an air inlet and an air intake check valve, the air inlet and the air intake check valve are connected in sequence, the access port of the first flexible hose is located between the air inlet and the air intake check valve, and the three-way connection position is located behind the air intake check valve.

[0008] The first flexible hose is connected behind the air inlet, and the primary air source obtained from the screw or piston compressor is divided into two paths, one of which is connected to the boosting module through the first flexible hose, and the other is connected to the isolation pump body through the connecting tee.

[0009] The boost module comprises a boost cylinder and a one-way valve group, the one-way valve group comprises two one-way valves, and the one-way valve group is provided with a one-way valve at the inlet and outlet of the boost cylinder respectively.

[0010] The one-way valve at the inlet of the boosting cylinder is used to cut off the gas reflux flow to the primary gas source end of the boosting module, and the one-way valve located at the inlet and outlet of the boosting cylinder is used to prevent high-pressure reflux into the diaphragm pump body.

[0011] Among them, the boosting cylinder is an inner hollow cavity, which is provided with a low-pressure chamber, a low-pressure piston, a connecting rod, a boosting piston, a boosting chamber and a stroke reversing valve. The low-pressure chamber and the boosting chamber are sealed with each other and are respectively arranged at both ends of the boosting cylinder.

[0012] The low-pressure piston, the connecting rod and the boosting piston are sequentially connected and fixed as an integral arrangement, the low-pressure piston is located in the low-pressure chamber, and the boosting piston is located in the boosting chamber.

[0013] Wherein, the stroke reversing valve is arranged on both sides of the low-pressure chamber and is in sliding contact with the low-pressure piston.

[0014] After the stroke reversing valve is triggered to adjust the inlet and outlet directions, the low-pressure piston, the connecting rod and the boost piston reciprocate in the inner cavity, and a secondary gas source is formed by compressing the gas in the boost chamber.

[0015] Wherein, the energy-saving high-pressure pneumatic diaphragm pump further includes a back-pressure valve, and the back-pressure valve is located between the air outlet of the boost module and the air inlet of the diaphragm pump body.

[0016] The back pressure valve is provided with an adjustable pressure spring for setting the air pressure of the output secondary air source.

[0017] The present invention provides an energy-saving high-pressure pneumatic diaphragm pump, comprising an air intake assembly, a first flexible hose, a boosting module, a connecting tee, a second flexible hose, an L-shaped support plate and a diaphragm pump body. The boosting module is integrated on the diaphragm pump body through the L-shaped support plate and corresponding pipelines, so as to shorten the high-pressure transmission distance and reduce the loss. The diaphragm pump has the advantages of simple structure, small size and high pneumatic efficiency. A cylinder drive is used in the boosting module, and high and low air sources are automatically switched through piston movement. The pump integrates the dual functions of an ordinary isobaric diaphragm pump and a boosting diaphragm pump. The output pressure can also be adjusted and controlled by a back pressure valve, so as to solve the technical problems that the output pressure of the isobaric diaphragm pump in the existing diaphragm pumps in the filter press industry is insufficient, and the boosting diaphragm pump cannot directly pump materials at the primary pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an energy-saving high-pressure pneumatic diaphragm pump of the present invention.

[0020] Figure 2 It is a top schematic diagram of an energy-saving high-pressure pneumatic diaphragm pump of the present invention.

[0021] Figure 3 It is a schematic diagram of gas path connection and flow direction of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the boost module of the present invention.

[0023] 1-intake assembly, 11-intake port, 12-intake check valve, 2-first flexible hose, 3-boost module, 31-boost cylinder, 311-low-pressure chamber, 312-low-pressure piston, 313-connecting rod, 314-boost piston, 315-boost chamber, 316-stroke reversing valve, 32-check valve group, 4-connecting tee, 5-second flexible hose, 6-L-type support plate, 7-diaphragm pump body, 8-back pressure valve, 9-filter chamber. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] See also Figures 1 to 4 The present invention proposes an energy-saving high-pressure pneumatic diaphragm pump, comprising an air intake component 1, a first live hose 2, a boost module 3, a connecting tee 4, a second live hose 5, an L-shaped support plate 6 and a diaphragm pump body 7, the air intake component 1 and the connecting tee 4 are threadedly connected, one end of the first live hose 2 is fixedly connected to the air intake component 1, the other end of the first live hose 2 is fixedly connected to the boost module 3, both ends of the second live hose 5 are respectively fixedly connected to the boost module 3 and the connecting tee 4, the L-shaped support plate 6 is fixedly connected to the diaphragm pump body 7 and is located above the diaphragm pump body 7, and the boost module 3 is arranged on the L-shaped support plate 6.

[0026] The air intake assembly 1 includes an air intake port 11 and an air intake check valve 12, and the air intake port 11 and the air intake check valve 12 are connected in sequence. The access port of the first flexible hose 2 is located between the air intake port 11 and the air intake check valve 12, and the access position of the connecting tee 4 is located behind the air intake check valve 12.

[0027] The boost module 3 includes a boost cylinder 31 and a one-way valve group 32 . The one-way valve group 32 includes two one-way valves. The one-way valve group 32 is provided with a one-way valve at the inlet and outlet of the boost cylinder 31 .

[0028] The boosting cylinder 31 is a hollow body, and is provided with a low-pressure chamber 311, a low-pressure piston 312, a connecting rod 313, a boosting piston 314, a boosting chamber 315 and a stroke reversing valve 316. The low-pressure chamber 311 and the boosting chamber 315 are sealed with each other and are respectively arranged at the two ends of the boosting cylinder 31.

[0029] The low-pressure piston 312 , the connecting rod 313 and the boosting piston 314 are sequentially connected and fixed as an integral arrangement. The low-pressure piston 312 is located in the low-pressure chamber 311 , and the boosting piston 314 is located in the boosting chamber 315 .

[0030] The travel reversing valve 316 is disposed on both sides of the low-pressure chamber 311 and is in sliding contact with the low-pressure piston 312 .

[0031] The energy-saving high-pressure pneumatic diaphragm pump further includes a back-pressure valve 8 , which is located between the air outlet of the boost module 3 and the air inlet 11 of the diaphragm pump body 7 .

[0032] In this embodiment, the pressure shortage is solved by locally boosting the end of the gas-driven independent module, the flow rate is increased by parallel gas supply, and the high and low pressure automatic switching is achieved through the direction control loop. The specific gas circuit connection and flow direction diagram are shown in the figure. Figure 3 As shown:

[0033] The primary air source obtained from the screw or piston compressor is divided into two high-pressure and low-pressure air circuits. The low-pressure air circuit directly drives the diaphragm pump to run after passing through the one-way valve, and the high-pressure air circuit drives the diaphragm pump after passing through the booster module 3 and flowing through the back pressure valve 8. The back pressure valve 8 is provided with an adjustable pressure spring to set the output secondary air pressure. When the filter press equipment is initially operated, the filter chamber 9 is empty and the filtration resistance is very small. The diaphragm pump obtains air supply from the primary air source (low pressure) and the secondary air source (high pressure) at the same time, which accelerates the filling speed of the pump. This stage is defined as the filling stage. When the filling resistance of the filter chamber 9 gradually increases and exceeds the pressure of the primary air source, the one-way valve is cut off, and the low-pressure air circuit of the primary air source automatically stops supplying air. After that, the flow required by the filter chamber 9 gradually decreases, while the booster module 3 continues to work, and the pressure is gradually increased. This stage is defined as the pressing stage, which takes a long time, so that the booster module 3 with high pressure and low flow is sufficient to meet the demand.

[0034] Specifically, in terms of logical sequence, when the required pressure at the material output end of the diaphragm pump is low (less than the primary air intake pressure), the aforementioned high-pressure and low-pressure air supply is connected in parallel, and the input power increases. At this time, the output flow of the diaphragm pump is greater than that of an isobaric diaphragm pump or a booster diaphragm pump with only a single input. When the required pressure at the material output end of the diaphragm pump is high (greater than the primary air intake pressure), the ordinary isobaric diaphragm pump stops reciprocating, no longer has pressure output, and is shut down. At this time, the diaphragm pump device only cuts off the low-pressure air circuit, and the booster pump on the high-pressure air circuit continuously boosts the primary air pressure, and the pump maintains reciprocating motion to output a higher pressure. For equipment such as filter presses that require high and low pressure cycles, this diaphragm pump has unique advantages. The entire filter press process can automatically switch the high and low pressure air supply circuits according to the outlet pressure, without the need for manual intervention, saving other logic control costs.

[0035] Furthermore, the principle of the boost module 3 is as follows Figure 4 As shown:

[0036] 1) The boost cylinder 31 is generally divided into single-stroke, double-stroke and multi-stroke cylinders. The stroke is related to the output pressure and integration complexity. In this embodiment, the single-stroke is described as follows: using the Pascal principle, several cylinder pistons and cavities are separated into mutually closed spaces, and each piston is fixed into one body through a connecting shaft, and can reciprocate synchronously. Just introduce the primary air source into the low-pressure chamber 311, and the low-pressure piston 312 pushes the boost piston 314 through the connecting rod 313 to compress the boost chamber 315 to discharge the high pressure to become the secondary air source. The output pressure can be adjusted by changing the ratio of the number of low-pressure chambers 311 to high-pressure chambers or the ratio of the ventilation cross-sectional areas of the two pistons.

[0037] 2) The function of the stroke reversing valve 316 is to trigger a signal to change the direction of intake and exhaust to realize the reciprocating cycle motion of the boost module 3.

[0038] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. An energy-saving high-pressure pneumatic diaphragm pump, characterized in that: It includes an air intake assembly, a first live hose, a boost module, a connecting tee, a second live hose, an L-shaped support plate and a diaphragm pump body, the air intake assembly and the connecting tee are threadedly connected, one end of the first live hose is fixedly connected to the air intake assembly, the other end of the first live hose is fixedly connected to the boost module, both ends of the second live hose are respectively fixedly connected to the boost module and the connecting tee, the L-shaped support plate is fixedly connected to the diaphragm pump body and is located above the diaphragm pump body, and the boost module is arranged on the L-shaped support plate; The energy-saving high-pressure pneumatic diaphragm pump also includes a back-pressure valve, which is located between the air outlet of the boost module and the air inlet of the diaphragm pump body, and the back-pressure valve is provided with an adjustable pressure spring.

2. The energy-saving high-pressure pneumatic diaphragm pump according to claim 1, characterized in that: The air intake assembly includes an air intake port and an air intake check valve, the air intake port and the air intake check valve are connected in sequence, the access port of the first flexible hose is located between the air intake port and the air intake check valve, and the three-way connection position is located behind the air intake check valve.

3. The energy-saving high-pressure pneumatic diaphragm pump according to claim 1, characterized in that: The boost module comprises a boost cylinder and a one-way valve group, wherein the one-way valve group comprises two one-way valves, and the one-way valve group is provided with a one-way valve at the inlet and outlet of the boost cylinder, respectively.

4. The energy-saving high-pressure pneumatic diaphragm pump according to claim 3, characterized in that: The boosting cylinder is an inner hollow cavity, and is provided with a low-pressure chamber, a low-pressure piston, a connecting rod, a boosting piston, a boosting chamber and a stroke reversing valve. The low-pressure chamber and the boosting chamber are sealed with each other and are respectively arranged at two ends of the boosting cylinder.

5. The energy-saving high-pressure pneumatic diaphragm pump according to claim 4, characterized in that: The low-pressure piston, the connecting rod and the boosting piston are sequentially connected and fixed to form an integral arrangement. The low-pressure piston is located in the low-pressure chamber, and the boosting piston is located in the boosting chamber.

6. The energy-saving high-pressure pneumatic diaphragm pump according to claim 4, characterized in that: The stroke reversing valve is arranged on both sides of the low-pressure chamber and is in sliding contact with the low-pressure piston.

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