Turn-back flow type damping isolation diaphragm pump

Abstract

The utility model belongs to the field of diaphragm pumps, in particular to a turn-back flow type damping shock insulation diaphragm pump, which comprises a pump body, a liquid inlet, a low-pressure liquid inlet cavity, a variable pressure cavity, a high-pressure liquid outlet cavity and a liquid outlet which are communicated in sequence are arranged on the pump body, the low-pressure liquid inlet cavity is arranged at the central part of the pump body, and the high-pressure liquid outlet cavity is arranged on the peripheral side of the pump body; the liquid inlet and the liquid outlet are formed in the same end of the pump body. The liquid inlet and the liquid outlet are both formed in the same end of the pump body, a turn-back type liquid flow direction is formed, and the overall occupied installation space is small; the low-pressure liquid inlet cavity is formed in the center of the pump body, and the high-pressure liquid outlet cavity is formed in the peripheral side of the pump body, so that liquid inlet pressure fluctuation can be balanced, the flow of the variable-pressure cavity, the high-pressure liquid outlet cavity and the liquid outlet is uniform, and the pressure is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of diaphragm pump, especially to a damper shock isolation diaphragm pump of foldback flow. BACKGROUND

[0002] Diaphragm pump is commonly used for water heater pressure increasing, high building pipeline pressure increasing, water purifier pressure increasing and the like, and is a common pressure increasing pump.

[0003] The diaphragm pump generally utilizes a driving mechanism to drive a flexible diaphragm to repeatedly move, so as to repeatedly change the size of a pressure changing cavity, thereby realizing pressure increasing of the delivered liquid. In the above working process, the flexible diaphragm intermittently moves towards the direction of increasing the pressure changing cavity following the driving mechanism, or the flexible diaphragm intermittently moves towards the direction of reducing the pressure changing cavity following the driving mechanism, and intermittent pressure increasing is realized in the process of the intermittent movement, so that pulsed pressure increasing liquid is obtained at the liquid outlet position of the diaphragm pump.

[0004] The conventional diaphragm pump is provided with a high-pressure liquid outlet cavity in the center thereof, is provided with a low-pressure liquid inlet cavity on the outer periphery side thereof in a ring shape, the low-pressure liquid inlet cavity and the high-pressure liquid outlet cavity are communicated with each other through a plurality of pressure changing cavities, the low-pressure liquid inlet cavity has a liquid inlet, and the high-pressure liquid outlet cavity has a liquid outlet; the technical scheme comprises a swing frame, a driving mechanism drives the swing frame to move up and down, so that the plurality of pressure changing cavities alternately supply liquid to the high-pressure liquid outlet cavity, and the pumped liquid is sequentially sent into the high-pressure liquid outlet cavity. The above technical scheme weakens the pulse characteristics of the obtained pressure increasing liquid to a certain extent and shortens the pulse period of the obtained pressure increasing liquid.

[0005] However, the technical scheme has the following problems: 1. The liquid inlet and the liquid outlet are arranged on the two sides of the pump body, which causes the diaphragm pump to occupy a large space in the radial direction, has a high requirement for the installation space, and the air bubbles in the pump body are difficult to discharge and are generally accumulated at the top of the pump body, which not only easily produces noise but also affects the quality of the water outlet; 2. Since the high-pressure liquid outlet cavity is arranged at the center of the diaphragm pump, the low-pressure liquid inlet cavity is arranged at the outer circumferential side of the high-pressure liquid outlet cavity, the plurality of liquid inlet interfaces are arranged at the outer circumferential side of the high-pressure liquid outlet cavity along the contour of the low-pressure liquid inlet cavity, the plurality of liquid inlet interfaces are arranged corresponding to the pressure-changing cavities, the inner diameter of the low-pressure liquid inlet cavity is larger than the outer diameter of the high-pressure liquid outlet cavity, the radial span of the low-pressure liquid inlet cavity is large, the diaphragm pump generally has only one liquid inlet arranged at the outer circumferential side, the spacing between each liquid inlet interface and the liquid inlet is large, and thus when the liquid inlet flow is small or unstable, it is difficult to ensure that the liquid inlet interface far from the liquid inlet has a liquid amount, thereby causing the flow of the pressure-changing cavity far from the liquid inlet to be unstable, the liquid amounts pumped by the plurality of pressure-changing cavities to be different, and even air is pumped into the pressure-changing cavity, noise is produced, and the phenomena of uneven liquid outlet flow and unstable pressure are easily caused; 3. The plurality of pressure-changing cavities pump liquid into the high-pressure liquid outlet cavity at the center, the liquid flows into the center from the periphery, the high-pressure liquid outlet cavity is prone to have a too high liquid pressure, and the liquid storage capacity of the high-pressure liquid outlet cavity is poor, although the damping sheet is arranged in the high-pressure liquid outlet cavity, the flow of the liquid inlet pipeline and the flow of the liquid pumped by the pressure-changing cavities have a great influence on the whole, and the phenomena of uneven liquid outlet flow, unstable pressure, and too high pressure are easily caused. Practical new type content

[0006] In order to overcome at least one defect of the prior art, the utility model provides a kind of damper shock insulation diaphragm pump of foldback flow, liquid inlet and liquid outlet are arranged in the same end of pump body, form the liquid flow of foldback type, and the installation space occupied by whole is smaller;Low-pressure liquid inlet cavity is arranged in the center of pump body, high-pressure liquid outlet cavity is arranged at the outer circumferential side of pump body, can balance liquid inlet pressure fluctuation, so that the flow of pressure-changing cavity, high-pressure liquid outlet cavity and liquid outlet is uniform, and pressure is stable.

[0007] The utility model discloses a kind of damper shock insulation diaphragm pump of foldback flow, which is characterized in that:

[0008] A kind of damper shock insulation diaphragm pump of foldback flow, comprising:

[0009] Pump body, pump body is provided with sequentially communicated liquid inlet, low-pressure liquid inlet cavity, pressure-changing cavity, high-pressure liquid outlet cavity and liquid outlet, low-pressure liquid inlet cavity is arranged in the center of pump body, high-pressure liquid outlet cavity is arranged at the outer circumferential side of pump body;

[0010] Liquid inlet and liquid outlet are arranged in the same end of pump body.

[0011] In one preferred embodiment, the damper shock insulation diaphragm pump of foldback flow further comprises a one-way valve assembly and a diaphragm.

[0012] The one-way valve assembly comprises a first one-way valve and a second one-way valve, the first one-way valve is arranged between the low-pressure liquid inlet cavity and the pressure change cavity, and the second one-way valve is arranged between the pressure change cavity and the high-pressure liquid outlet cavity;

[0013] The pressure change cavity is provided with a diaphragm, the diaphragm increases or reduces the pressure change cavity through movement, and the pressure change cavity alternately pumps the liquid in the low-pressure liquid inlet cavity into the high-pressure liquid outlet cavity through the movement of the diaphragm.

[0014] In a preferred embodiment, the liquid inlet and the liquid outlet are both arranged at the top end of the pump body;

[0015] And the central axis of the liquid inlet, the central axis of the liquid outlet and the central axis of the low-pressure liquid inlet cavity are parallel to each other.

[0016] In a preferred embodiment, the return flow type damping shock isolation diaphragm pump further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is arranged at the liquid inlet, and the liquid outlet pipe is arranged at the liquid outlet, a plurality of liquid outlet holes are arranged on the liquid outlet pipe, and the plurality of liquid outlet holes are arranged around the liquid outlet pipe.

[0017] In a preferred embodiment, the low-pressure liquid inlet cavity and the pressure change cavity are provided with a liquid inlet interface, the pressure change cavity and the high-pressure liquid outlet cavity are provided with a liquid outlet interface, the liquid inlet interface is provided with a first one-way valve, and the liquid outlet interface is provided with a second one-way valve;

[0018] The flow direction of the first one-way valve is the direction from the low-pressure liquid inlet cavity to the pressure change cavity, the first one-way valve comprises a first flexible diaphragm, the first flexible diaphragm is arranged in the pressure change cavity, and the first flexible diaphragm blocks the liquid inlet interface;

[0019] The flow direction of the second one-way valve is the direction from the pressure change cavity to the high-pressure liquid outlet cavity, the second one-way valve comprises a second flexible diaphragm, the second flexible diaphragm is arranged in the high-pressure liquid outlet cavity, and the second flexible diaphragm blocks the liquid outlet interface;

[0020] The liquid inlet interface and the liquid outlet interface are both arranged at one end of the pressure change cavity, and the diaphragm is arranged at the other end of the pressure change cavity.

[0021] In a preferred embodiment, the high-pressure liquid outlet cavity comprises a first high-pressure liquid outlet sub-cavity and a second high-pressure liquid outlet sub-cavity which are in communication with each other, the first high-pressure liquid outlet sub-cavity and the second high-pressure liquid outlet sub-cavity are arranged up and down along the axial direction of the pump body, the first high-pressure liquid outlet sub-cavity is arranged close to the pressure change cavity, and the second high-pressure liquid outlet sub-cavity is in communication with the liquid outlet.

[0022] In a preferred embodiment, the pump body comprises a pump body, a first partition, a second partition and a third partition;

[0023] The pump body and the first partition piece are nested, the first partition piece is inserted into the interior of the pump body, and the first partition piece extends along the axial direction of the pump body, and the first partition piece is used for forming a low-pressure liquid inlet cavity, and the first partition piece and the pump body are used for forming a high-pressure liquid outlet cavity;

[0024] The second partition piece is radially arranged between the first partition piece and the pump body, and the second partition piece separates a first high-pressure liquid outlet sub-cavity and a second high-pressure liquid outlet sub-cavity, and a plurality of connecting holes are arranged on the second partition piece and are communicated with the first high-pressure liquid outlet sub-cavity and the second high-pressure liquid outlet sub-cavity.

[0025] The first partition piece and the second partition piece are arranged at the upper portion of the pump body, the third partition piece and the diaphragm are arranged at the lower portion of the pump body, and the third partition piece and the diaphragm are used for forming a pressure change cavity.

[0026] In a preferred embodiment, a plurality of pressure change cavities are arranged, each of the pressure change cavities is isolated from each other, and each of the pressure change cavities is correspondingly provided with at least one liquid inlet interface and at least one liquid outlet interface.

[0027] In a preferred embodiment, the damper piece is arranged in the high-pressure liquid outlet cavity.

[0028] In a preferred embodiment, the damper piece is arranged in the high-pressure liquid outlet cavity.

[0029] The swing frame is fixedly connected with the diaphragm, a plurality of fixing points are arranged between the swing frame and the diaphragm, and each of the pressure change cavities is correspondingly provided with at least one fixing point.

[0030] In summary, the utility model has the following technical effects:

[0031] 1. The liquid inlet and the liquid outlet in the utility model are arranged at the same end portion of the pump body, the liquid flow direction is formed in a turn-back mode, the overall installation space is small, the low-pressure liquid inlet cavity is arranged at the center portion of the pump body, the high-pressure liquid outlet cavity is arranged at the outer circumferential side of the pump body, the liquid inlet pressure fluctuation can be balanced, and the flow of the pressure change cavity, the high-pressure liquid outlet cavity and the liquid outlet is uniform and the pressure is stable.

[0032] 2. The liquid inlet and the liquid outlet in the utility model are arranged at the top end of the pump body, the bubbles in the pump body can be easily discharged, the bubbles are prevented from gathering at the top portion of the pump body, the water quality is improved, and the working noise caused by the bubbles is reduced.

[0033] 3、The utility model discloses a liquid self-liquid inlet discharges from the liquid outlet through low-pressure liquid inlet cavity, pressure change cavity, first high-pressure liquid outlet sub-cavity and second high-pressure liquid outlet sub-cavity, and the first high-pressure liquid outlet sub-cavity carries out first confluence to liquid in the axial direction of pump body, and the second high-pressure liquid outlet sub-cavity carries out second confluence to liquid in the radial direction of pump body, and the first high-pressure liquid outlet sub-cavity and second high-pressure liquid outlet sub-cavity carry out secondary buffering to the liquid after pressure boost, avoid the situation that liquid outlet pressure is too high, and first high-pressure liquid outlet sub-cavity has liquid storage energy, realizes pressure stabilization, makes liquid outlet flow even, and pressure is stable, and first high-pressure liquid outlet sub-cavity and second high-pressure liquid outlet sub-cavity form double-layer high-pressure liquid outlet cavity, can relieve the pulsation of high-pressure liquid outlet, and stabilize the flow rate of liquid outlet, slow down the impact of liquid to pipeline and / or equipment, reduce vibration and noise.

[0034] 4、The utility model discloses a plurality of pressure change cavities all pump liquid from the low-pressure liquid inlet cavity at the center part to the high-pressure liquid outlet cavity at the outer periphery side, and the liquid converges from the center to the periphery, which is different from the flow mode in the prior art that liquid converges from the periphery to the center, each liquid inlet interface is centrally arranged at the center part of the pump body and can be arranged close to the central shaft of the pump body, the spacing between each liquid inlet interface and the liquid inlet is relatively small, when the liquid inlet flow is small or unstable, the liquid inlet amount of each liquid inlet interface is relatively uniform, so that the liquid amount pumped by the plurality of pressure change cavities is relatively uniform, and air is avoided from being pumped into the pressure change cavities.

[0035] 5、The utility model discloses a damper sheet is used to improve the pressure fluctuation of liquid inlet and outlet, so that the damper diaphragm pump has the functions of adjustment, shock isolation and shock absorption. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the structure schematic diagram of the first visual angle of part external structure of the utility model;

[0037] Figure 2 It is the structure schematic diagram of the second visual angle of part external structure of the utility model;

[0038] Figure 3 It is the exploded structure schematic diagram of the utility model; Figure 1

[0039] Figure 4 It is the flow direction schematic diagram of the utility model liquid from low-pressure liquid inlet cavity into pressure change cavity;

[0040] Figure 5 It is the flow direction schematic diagram of the utility model liquid from pressure change cavity into high-pressure liquid outlet cavity;

[0041] Figure 6 It is the structure schematic diagram of the first visual angle of part structure of the utility model pump body;

[0042] Figure 7 ​It is the structure schematic view of the second perspective of the part structure of the pump body of the utility model;

[0043] Figure 8 It is the structure schematic view of the third partition piece of the utility model;

[0044] Figure 9 It is the structure schematic view of the first perspective of the third partition piece, the first flexible diaphragm and the second flexible diaphragm of the utility model;

[0045] Figure 10 It is the structure schematic view of the second perspective of the third partition piece, the first flexible diaphragm and the second flexible diaphragm of the utility model.

[0046] Among them, the meaning of the sign is as follows:

[0047] 10, pump body, 101, pump body, 102, first partition piece, 103, second partition piece, 104, connecting hole, 105, third partition piece, 20, liquid inlet, 30, low pressure liquid inlet cavity, 40, pressure chamber, 50, high pressure liquid outlet cavity, 501, first high pressure liquid outlet subcavity, 502, second high pressure liquid outlet subcavity, 60, liquid outlet, 70, one-way valve assembly, 701, first flexible diaphragm, 702, second flexible diaphragm, 80, diaphragm, 90, liquid inlet interface, 100, liquid outlet interface, 110, liquid inlet pipe, 120, liquid outlet pipe, 130, liquid outlet hole, 140, damping sheet, 150, pump cover, 160, swing frame, 170, pressure relief valve. DETAILED DESCRIPTION

[0048] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model.

[0049] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0051] Reference Figures 1-10The utility model discloses a kind of turn-back flow type damping shock insulation diaphragm pumps, comprising: pump body 10, pump body 10 is provided with sequentially connected liquid inlet 20, low-pressure liquid inlet chamber 30, pressure changing chamber 40, high-pressure liquid outlet chamber 50 and liquid outlet 60, low-pressure liquid inlet chamber 30 is arranged in the center portion of pump body 10, and high-pressure liquid outlet chamber 50 is arranged at the outer circumferential side of pump body 10;Liquid inlet 20 and liquid outlet 60 are all arranged at the same end portion of pump body 10.

[0052] In the utility model, liquid inlet 20 and liquid outlet 60 are all arranged at the same end portion of pump body 10, form the liquid flow direction of turn-back type, and the overall installation space is smaller;Low-pressure liquid inlet chamber 30 is arranged in the center portion of pump body 10, and high-pressure liquid outlet chamber 50 is arranged at the outer circumferential side of pump body 10, can balance liquid inlet pressure fluctuation, so that the flow of pressure changing chamber 40, high-pressure liquid outlet chamber 50 and liquid outlet 60 is uniform, and pressure is stable.

[0053] The utility model is especially suitable for water purifier, so as to increase the pressure of water.

[0054] In the embodiment of the utility model, the turn-back flow type damping shock insulation diaphragm pump further includes one-way valve assembly 70, one-way valve assembly 70 includes first one-way valve and second one-way valve, first one-way valve is arranged between low-pressure liquid inlet chamber 30 and pressure changing chamber 40, and second one-way valve is arranged between pressure changing chamber 40 and high-pressure liquid outlet chamber 50;Diaphragm 80, pressure changing chamber 40 is provided with diaphragm 80, diaphragm 80 increases or reduces pressure changing chamber 40 by movement, and pressure changing chamber 40 moves alternately through diaphragm 80 and pumps the liquid in low-pressure liquid inlet chamber 30 into high-pressure liquid outlet chamber 50.

[0055] In the embodiment of the utility model, liquid inlet 20 and liquid outlet 60 are all arranged at the top end of pump body 10;And the central axis of liquid inlet 20, the central axis of liquid outlet 60 and the central axis of low-pressure liquid inlet chamber 30 are mutually parallel.

[0056] In the utility model, liquid inlet 20 and liquid outlet 60 are all arranged at the top end of pump body 10, beneficial to the bubble discharge in pump body 10, avoid bubble gathering at the top of pump body 10, improve water quality, and reduce the working noise due to bubble.

[0057] In the embodiment of the utility model, the turn-back flow type damping shock insulation diaphragm pump further includes liquid inlet pipe 110 and liquid outlet pipe 120, liquid inlet pipe 110 is arranged at liquid inlet 20, liquid outlet pipe 120 is arranged at liquid outlet 60, a plurality of liquid outlet holes 130 are arranged on liquid outlet pipe 120, and a plurality of liquid outlet holes 130 are arranged around liquid outlet pipe 120;When larger bubble in liquid passes through liquid outlet hole 130, bubble will break, so that the bubble that enters liquid outlet 60 becomes small.

[0058] In the utility model embodiment, low pressure liquid inlet cavity 30 and variable pressure cavity 40 between being provided with liquid inlet interface 90, variable pressure cavity 40 and high pressure liquid outlet cavity 50 between being provided with liquid outlet interface 100, liquid inlet interface 90 at being provided with first check valve, liquid outlet interface 100 at being provided with second check valve;The flow direction of first check valve is the direction of low pressure liquid inlet cavity 30 to variable pressure cavity 40, and first check valve includes first flexible diaphragm 701, and first flexible diaphragm 701 is arranged in variable pressure cavity 40, and first flexible diaphragm 701 shields liquid inlet interface 90;The flow direction of second check valve is the direction of variable pressure cavity 40 to high pressure liquid outlet cavity 50, and second check valve includes second flexible diaphragm 702, and second flexible diaphragm 702 is arranged in high pressure liquid outlet cavity 50, and second flexible diaphragm 702 shields liquid outlet interface 100;Liquid inlet interface 90 and liquid outlet interface 100 are all arranged in one end of variable pressure cavity 40, and diaphragm 80 is arranged in the other end of variable pressure cavity 40.

[0059] Specifically, first flexible diaphragm 701 and second flexible diaphragm 702 are all flexible structure, and first flexible diaphragm 701 and second flexible diaphragm 702 are all made of rubber material, silica gel material or high polymer material;When using, first flexible diaphragm 701 realizes bending deformation according to the change of variable pressure cavity 40 volume and pressure, to open and close liquid inlet interface 90, and second flexible diaphragm 702 realizes bending deformation according to the change of variable pressure cavity 40 volume and pressure, to open and close liquid outlet interface 100.

[0060] In the utility model embodiment, high pressure liquid outlet cavity 50 includes first high pressure liquid outlet sub-cavity 501 and second high pressure liquid outlet sub-cavity 502 that are communicated with each other, and first high pressure liquid outlet sub-cavity 501 and second high pressure liquid outlet sub-cavity 502 are arranged up and down along the axial direction of pump body 10, and first high pressure liquid outlet sub-cavity 501 is arranged close to variable pressure cavity 40, and second high pressure liquid outlet sub-cavity 502 is communicated with liquid outlet 60.

[0061] The utility model liquid is discharged from liquid outlet 60 through low pressure liquid inlet cavity 30, variable pressure cavity 40, first high pressure liquid outlet sub-cavity 501 and second high pressure liquid outlet sub-cavity 502, first high pressure liquid outlet sub-cavity 501 carries out first confluence to liquid in the axial direction of pump body 10, second high pressure liquid outlet sub-cavity 502 carries out second confluence to liquid in the radial direction of pump body 10, and first high pressure liquid outlet sub-cavity 501 and second high pressure liquid outlet sub-cavity 502 carry out secondary buffering to the liquid after pressure increasing, avoid the situation that the liquid outlet pressure is too high;And first high pressure liquid outlet sub-cavity 501 has liquid storage energy, realizes pressure stabilization, makes the liquid outlet flow even, and the pressure is stable;First high pressure liquid outlet sub-cavity 501 and second high pressure liquid outlet sub-cavity 502 form double-layer high pressure liquid outlet cavity 50, can relieve the pulsation of high pressure liquid outlet, and stabilize the flow rate of liquid outlet, slow down the impact of liquid to pipeline and / or equipment, reduce vibration and noise.

[0062] In the embodiment of the utility model, pump body 10 includes pump body ontology 101, first partition 102 and second partition 103, pump body ontology 101 and first partition 102 nest setting, first partition 102 is inserted in the inside of pump body ontology 101, and first partition 102 extends along the axial direction of pump body ontology 101, first partition 102 is used to form low pressure liquid inlet chamber 30, and first partition 102 and pump body ontology 101 are used to form high pressure liquid outlet chamber 50, second partition 103 is radially set between first partition 102 and pump body ontology 101, and second partition 103 is separated into first high pressure liquid outlet subchamber 501 and second high pressure liquid outlet subchamber 502, a plurality of connecting holes 104 are arranged on second partition 103, and connecting hole 104 is communicated with first high pressure liquid outlet subchamber 501 and second high pressure liquid outlet subchamber 502.

[0063] Specifically, connecting hole 104 is set away from liquid outlet 60 to avoid liquid impact on liquid outlet 60, and the size of connecting hole 104 is determined according to the flow of liquid.

[0064] In the embodiment of the utility model, pump body 10 further includes third partition 105, first partition 102 and second partition 103 are arranged on the upper portion of pump body ontology 101, third partition 105 and diaphragm 80 are arranged on the lower portion of pump body ontology 101, and third partition 105 and diaphragm 80 are used to form pressure change chamber 40.

[0065] It should be noted that pump body ontology 101, first partition 102, second partition 103 and third partition 105 can be made in a split body, and then connected into one by screw connection or welding process; of course, pump body ontology 101, first partition 102, second partition 103 and third partition 105 can also be an integral structure.

[0066] Preferably, pump body ontology 101, first partition 102 and second partition 103 are an integral structure, the integral structure is screwed with the integral structure again through screw with third partition 105, and a sealing ring is arranged between the two to seal, and the above structure is beneficial to processing and assembly.

[0067] Specifically, pump body ontology 101 and first partition 102 are sleeve-shaped, second partition 103 is plate-shaped, and third partition 105 is shell-shaped, and the specific shape of pump body ontology 101, first partition 102, second partition 103 and third partition 105 is determined according to the actual application scene, and is not limited thereto.

[0068] In the embodiment of the utility model, the pressure changing cavities 40 are provided in plurality, each pressure changing cavity 40 is mutually isolated, and each pressure changing cavity 40 is provided with at least one liquid inlet interface 90 and at least one liquid outlet interface 100.

[0069] In the embodiment of the utility model, the pressure changing cavities 40 are provided in plurality, each pressure changing cavity 40 is mutually isolated, and each pressure changing cavity 40 is provided with at least one liquid inlet interface 90 and at least one liquid outlet interface 100.

[0070] For example, the liquid inlet interface 90, the liquid outlet interface 100 and the pressure changing cavity 40 are five in number, the five pressure changing cavities 40 are arranged around the central axis of the pump body 10, and the five pressure changing cavities 40 are arranged radially.

[0071] Specifically, the first high-pressure liquid outlet sub-cavity 501 can be divided into a plurality of cavities in communication or isolation, and the cavities are one-to-one corresponding to the pressure changing cavities 40.

[0072] In the embodiment of the utility model, the damper sheet 140 is arranged in the high-pressure liquid outlet cavity 50.

[0073] Preferably, the damper sheet 140 is of a flexible structure and is made of rubber material, silica gel material or high polymer material.

[0074] Specifically, referring to Figures 4-5 The buffer gap is provided between the second high-pressure liquid outlet sub-cavity 502 and the damper sheet 140, and a pump cover 150 is further provided.

[0075] In the embodiment of the utility model, the return flow type damping shock insulation diaphragm pump further comprises a driving unit, an eccentric wheel and a swing frame 160, the driving unit drives the swing frame 160 to move up and down through the eccentric wheel, the swing frame 160 is fixedly connected with the diaphragm 80, a plurality of fixed points are arranged between the swing frame 160 and the diaphragm 80, and each variable pressure cavity 40 corresponds to at least one fixed point.

[0076] Preferably, the diaphragm 80 is of a flexible structure, and the diaphragm 80 is of an integral structure, for example, the diaphragm 80 can be made of rubber or a high polymer material, and the diaphragm 80 realizes the alternating change of the volume of the variable pressure cavity 40 through the deformation caused by the up-and-down movement of the diaphragm 80 itself; of course, in other embodiments, the diaphragm 80 can also be of a rigid structure, the diaphragms 80 corresponding to the respective variable pressure cavities 40 are independent of each other, and the volume of the corresponding variable pressure cavity 40 is changed through the up-and-down position change of each diaphragm 80; the specific form of the diaphragm 80 is determined according to the actual application scene and is not limited in this way.

[0077] Specifically, the driving unit and the eccentric wheel are not shown, the driving unit is a motor, and the up-and-down movement of the driving unit, the eccentric wheel and the swing frame 160 belongs to the prior art and will not be described here; of course, a plurality of air cylinders can also be used to alternately drive the diaphragm 80 to alternately move up and down, so that the diaphragm 80 increases or reduces the variable pressure cavity 40 through the movement, and the plurality of variable pressure cavities 40 alternately pump the liquid in the low-pressure liquid inlet cavity 30 into the high-pressure liquid outlet cavity 50 through the movement of the diaphragm 80

[0078] In the embodiment of the utility model, the return flow type damping shock insulation diaphragm pump comprises a pressure relief valve 170, and the pressure relief valve 170 is arranged on the pump body 10.

[0079] The specific working process of the utility model is as follows:

[0080] Referring to Figure 4 , the actual volume of one of the variable pressure cavities 40 increases, the corresponding first one-way valve opens the liquid inlet interface 90, the corresponding second one-way valve closes the liquid outlet interface 100, and the liquid enters the variable pressure cavity 40 from the low-pressure liquid inlet cavity 30;

[0081] Referring to Figure 5 , then the actual volume of the variable pressure cavity 40 decreases, the corresponding first one-way valve closes the liquid inlet interface 90, the corresponding second one-way valve opens the liquid outlet interface 100, and the liquid sequentially enters the first high-pressure liquid outlet sub-cavity 501 and the second high-pressure liquid outlet sub-cavity 502 from the variable pressure cavity 40 and is discharged from the liquid outlet 60.

[0082] It can be understood that the variable pressure cavities 40 of the return flow type damping shock insulation diaphragm pump alternately perform the above process, or several of the variable pressure cavities 40 form a group and alternately perform the above process, and the specific working process of each variable pressure cavity 40 is subject to the condition that the liquid can be pumped.

[0083] The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, under the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. A folded flow dampened shock isolated diaphragm pump characterized by, Comprise: Pump body, which is provided with sequentially communicated liquid inlet, low-pressure liquid inlet cavity, pressure change cavity, high-pressure liquid outlet cavity and liquid outlet, the low-pressure liquid inlet cavity is arranged in the center of the pump body, and the high-pressure liquid outlet cavity is arranged on the outer circumferential side of the pump body; The liquid inlet and the liquid outlet are both arranged at the top end of the pump body; and the central axis of the liquid inlet, the central axis of the liquid outlet and the central axis of the low-pressure liquid inlet cavity are parallel to each other; Liquid inlet pipe and liquid outlet pipe, the liquid inlet pipe is arranged at the liquid inlet, the liquid outlet pipe is arranged at the liquid outlet, and a plurality of liquid outlet holes are arranged on the liquid outlet pipe, the plurality of liquid outlet holes are arranged around the liquid outlet pipe.

2. The folded flow dampened shock isolated diaphragm pump of claim 1, wherein: Also comprising a one-way valve assembly and a diaphragm; The one-way valve assembly comprises a first one-way valve and a second one-way valve, the first one-way valve is arranged between the low-pressure liquid inlet cavity and the pressure change cavity, and the second one-way valve is arranged between the pressure change cavity and the high-pressure liquid outlet cavity; The diaphragm is arranged in the pressure change cavity, the diaphragm increases or reduces the pressure change cavity by movement, and the pressure change cavity alternately pumps the liquid in the low-pressure liquid inlet cavity into the high-pressure liquid outlet cavity through the diaphragm movement.

3. The folded flow dampened shock isolated diaphragm pump of claim 2, wherein: The low-pressure liquid inlet cavity and the pressure change cavity are provided with a liquid inlet interface, and the pressure change cavity and the high-pressure liquid outlet cavity are provided with a liquid outlet interface, the first one-way valve is arranged at the liquid inlet interface, and the second one-way valve is arranged at the liquid outlet interface; The flow direction of the first one-way valve is the direction from the low-pressure liquid inlet cavity to the pressure change cavity, the first one-way valve comprises a first flexible diaphragm, the first flexible diaphragm is arranged in the pressure change cavity, and the first flexible diaphragm blocks the liquid inlet interface; The flow direction of the second one-way valve is the direction from the pressure change cavity to the high-pressure liquid outlet cavity, the second one-way valve comprises a second flexible diaphragm, the second flexible diaphragm is arranged in the high-pressure liquid outlet cavity, and the second flexible diaphragm blocks the liquid outlet interface; The liquid inlet interface and the liquid outlet interface are both arranged at one end of the pressure change cavity, and the diaphragm is arranged at the other end of the pressure change cavity.

4. The folded flow dampened shock isolated diaphragm pump of claim 3, wherein: The high-pressure liquid outlet cavity comprises a first high-pressure liquid outlet sub-cavity and a second high-pressure liquid outlet sub-cavity which are communicated with each other, the first high-pressure liquid outlet sub-cavity and the second high-pressure liquid outlet sub-cavity are arranged up and down along the axial direction of the pump body, the first high-pressure liquid outlet sub-cavity is arranged close to the pressure change cavity, and the second high-pressure liquid outlet sub-cavity is communicated with the liquid outlet.

5. The folded flow type damping shock isolator diaphragm pump of claim 4, wherein: The pump body comprises a pump body, a first partition, a second partition and a third partition; The pump body and the first partition are nested, the first partition is inserted into the interior of the pump body, and the first partition extends along the axial direction of the pump body, the first partition is used for forming the low-pressure liquid inlet cavity, and the first partition and the pump body are used for forming the high-pressure liquid outlet cavity; The second partition is radially arranged between the first partition and the pump body, and separates the first high-pressure liquid outlet sub-cavity and a second high-pressure liquid outlet sub-cavity, and a plurality of connecting holes are arranged on the second partition and communicate the first high-pressure liquid outlet sub-cavity and the second high-pressure liquid outlet sub-cavity. The first partition and the second partition are arranged on the upper part of the pump body, and the third partition and the diaphragm are arranged on the lower part of the pump body, and the third partition and the diaphragm are used to form the variable-pressure cavity.

6. The folded flow type damping shock isolator diaphragm pump of claim 5, wherein: A plurality of variable-pressure cavities are arranged, and each variable-pressure cavity is isolated from each other, and at least one liquid inlet interface and at least one liquid outlet interface are arranged in each variable-pressure cavity.

7. The folded flow dampened isolation diaphragm pump of claim 1, wherein: A damping piece is further included, and the damping piece is arranged in the high-pressure liquid outlet cavity.

8. The folded flow dampened isolation diaphragm pump of claim 1, wherein: A driving unit, an eccentric wheel and a swing frame are further included, and the driving unit drives the swing frame to move up and down through the eccentric wheel. The swing frame is fixedly connected with the diaphragm, a plurality of fixing points are arranged between the swing frame and the diaphragm, and at least one fixing point is arranged in each variable-pressure cavity.

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