Small plunger pump for corrosive liquid

Abstract

The utility model discloses a small plunger pump for corrosive liquid, which relates to the technical field of fluid conveying equipment and comprises a motor, an eccentric mechanism and a pump head. The pump head comprises a pump shell, a piston, a cavity, a liquid inlet, a liquid outlet and one-way valves, and the one-way valves comprise a liquid inlet one-way valve arranged in the liquid inlet and a liquid outlet one-way valve arranged at the liquid outlet; a reciprocating piston is arranged on the upper surface of the cavity, a liquid inlet is formed in the lower left corner of the piston, a liquid outlet is formed in the lower right corner of the piston, the sectional area of the liquid inlet is the same as that of the liquid outlet, and the piston structure is a stainless steel part with a Teflon material shell and is connected with the cavity through a fluororubber oil seal; the one-way valve is composed of a liquid inlet channel, an outer magnetic steel ring, a magnetic steel nut shell, a flow guide groove, piston magnetic steel and a liquid outlet, the problems of corrosion, blockage, unstable flow and the like when a traditional plunger pump conveys corrosive liquid are solved, and the one-way valve has the advantages of being resistant to corrosion, stable in flow, adjustable in pressure, compact in structure and easy and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid conveying equipment technical field, concretely is a small -size plunger pump for corrosive liquid. BACKGROUND

[0002] In industrial production, the delivery of corrosive liquid is a common but challenging task. Traditional plunger pumps often face problems such as material corrosion, seal failure, and unstable flow when handling corrosive liquids. Existing plunger pumps usually use metal materials, which have certain strength and wear resistance, but are prone to corrosion when in contact with corrosive liquids for a long time, causing pump body damage and affecting service life. In addition, the one-way valve design of traditional plunger pumps is complex and prone to blockage or failure, especially in high-viscosity or particle-containing liquids, greatly reducing the reliability of the valve.

[0003] To solve these problems, some improvements have been proposed in the prior art, such as using corrosion-resistant materials or adding filtering devices. However, these solutions often increase the complexity and cost of the pump, and still have certain limitations in practical application. Therefore, there is an urgent need for a simple structure, strong corrosion resistance, and stable flow plunger pump to meet the demand for delivery of corrosive liquids in industrial production. SUMMARY

[0004] To overcome the shortcomings of the prior art, the purpose of the utility model is to provide a small plunger pump for corrosive liquid, which solves the problems of corrosion, blockage, and unstable flow of traditional plunger pumps when delivering corrosive liquids through innovative material selection and structural design.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A small plunger pump for corrosive liquid, comprising a motor, an eccentric mechanism, and a pump head; the pump head comprises a pump shell, a piston, a cavity, an inlet, an outlet, and a one-way valve, the one-way valve comprising an inlet one-way valve arranged in the inlet and an outlet one-way valve arranged in the outlet.

[0007] As a preferred technical scheme of the utility model, the upper surface of the cavity is a reciprocating piston, the lower left corner of the piston is an inlet, and the lower right corner is an outlet, the cross-sectional area of the inlet and outlet is the same, and the corresponding inlet one-way valve and outlet one-way valve are arranged in the inlet and outlet respectively.

[0008] As a preferred technical scheme of the utility model, the piston structure is a stainless steel piece with a Teflon material shell, connected to the cavity through a fluororubber oil seal, and the ratio of the maximum volume to the minimum volume of the cavity during reciprocating motion of the piston is not less than 2.

[0009] As a preferred technical scheme of the utility model, the one-way valve is composed of an inlet channel, an outer ring magnetic steel ring, a magnetic steel nut shell, a flow guide groove, a piston magnetic steel, a liquid outlet, a nylon magnetic protection shell and the flow guide groove.

[0010] As a preferred technical scheme of the utility model, the magnetic steel in the outer ring magnetic steel ring is different in polarity from the built-in circular ring magnetic steel of the piston magnetic steel, and adjusting the up-down position of the outer ring magnetic steel nut can change the opening pressure of the one-way valve.

[0011] As a preferred technical scheme of the utility model, the one-way valve is internally provided with a plurality of flow guide grooves, and the total area of the plurality of flow guide grooves is the same as the area of the inlet, and when the valve is opened, the liquid flows to the liquid outlet through the flow guide groove.

[0012] As a preferred technical scheme of the utility model, the piston has independent cavities, inlet ports, outlet ports, inlet port one-way valves and outlet port one-way valves on the left and right sides; the input ends of the two left and right inlet port one-way valves are communicated, and the output ends of the two left and right outlet port one-way valves are communicated.

[0013] As a preferred technical scheme of the utility model, the one-way valve and the pump shell are both 3D printed using nylon material.

[0014] The utility model has the advantages of strong corrosion resistance, stable flow, adjustable pressure, compact structure, easy maintenance and the like. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Structure diagram of a small piston pump for corrosive liquid Figure 1 .

[0016] Figure 2 Structure diagram of a small piston pump for corrosive liquid Figure 2 .

[0017] Figure 3It is a sectional structure diagram of a cavity of a small plunger pump for corrosive liquid.

[0018] Figure 4 It is a sectional structure diagram of a cavity of a small plunger pump for corrosive liquid.

[0019] Figure 5 It is a sectional structure diagram of a one-way valve of a small plunger pump for corrosive liquid.

[0020] Figure 6 It is an external overall structure diagram of a one-way valve of a small plunger pump for corrosive liquid.

[0021] In the figure: 1, pump shell; 2, motor; 3, eccentric mechanism; 4, liquid inlet; 5, liquid outlet; 6, piston; 7, cavity; 8, liquid inlet one-way valve; 9, liquid outlet one-way valve; 10, liquid inlet channel; 11, magnetic steel nut shell; 12, nylon magnetic rigid protective shell; 13, outer ring magnetic steel ring; 14, flow guide groove; 15, piston magnetic steel; 16, liquid outlet. DETAILED DESCRIPTION

[0022] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0023] Embodiment 1, please refer to Figures 1-6 A small plunger pump for corrosive liquid, comprising a motor 2, an eccentric mechanism 3, and a pump head; the pump head comprises a pump shell 1, a piston 6, a cavity 7, a liquid inlet 4, a liquid outlet 5, and a one-way valve, the one-way valve comprises a liquid inlet one-way valve 8 arranged in the liquid inlet 4 and a liquid outlet one-way valve 9 arranged in the liquid outlet 5.

[0024] The upper surface of the cavity 7 is a reciprocating piston 6, the lower left corner of the piston 6 is the liquid inlet 4, and the lower right corner is the liquid outlet 5; the cross-sectional areas of the liquid inlet 4 and the liquid outlet 5 are the same, and the corresponding liquid inlet one-way valve 8 and liquid outlet one-way valve 9 are arranged in the liquid inlet 4 and the liquid outlet 5 respectively.

[0025] The piston 6 is a stainless steel part with a Teflon material shell, connected to the cavity 7 through a fluorine rubber oil seal; when the piston 6 reciprocates, the ratio of the maximum volume to the minimum volume of the cavity 7 is not less than 2.

[0026] The one-way valve is composed of a liquid inlet channel 10, an outer ring magnetic steel ring 13, a magnetic steel nut shell 11, a flow guide groove 14, a piston magnetic steel 15, a liquid outlet 16, a nylon magnetic rigid protective shell 12, and the flow guide groove 14; the outer ring magnetic steel ring 13 is sealed in the magnetic steel nut shell 11, the magnetic steel nut shell 11 can be adjusted up and down through threads, and the piston magnetic steel 15 is composed of a cylindrical magnetic steel sealed in a cylindrical nylon material.

[0027] The magnetic steel in the outer ring magnetic steel ring 13 is different in polarity from the built-in circular ring magnetic steel of the piston magnetic steel 15. The up and down position of the outer ring magnetic steel nut can change the pressure at which the one-way valve opens.

[0028] The one-way valve is internally provided with a plurality of flow guide grooves 14, and the total area of the plurality of flow guide grooves 14 is the same as the area of the liquid inlet 4. When the valve is opened, the liquid flows to the liquid outlet 16 through the flow guide grooves 14.

[0029] The piston 6 has independent cavities 7, liquid inlets 4, liquid outlets 5, liquid inlet one-way valves 8 and liquid outlet one-way valves 9 on both left and right sides. The input ends of the two liquid inlet one-way valves 8 are connected, and the output ends of the two liquid outlet one-way valves 9 are connected. The up and down position of the outer ring magnetic steel nut can change the pressure at which the one-way valve opens. When the liquid height is within 5 meters, the pressure is about 50Kpa, and a separate valve can not be used. The one-way valve and the pump shell (1) are made of nylon material by 3D printing.

[0030] In actual use, the motor 2 drives the piston 6 to reciprocate through the eccentric mechanism 3. The eccentric mechanism converts the rotary motion of the motor 2 into the linear reciprocating motion of the piston 6. When the piston 6 moves to the left, the volume of the cavity 7 increases, forming a negative pressure, the liquid inlet one-way valve 8 opens, and the liquid enters the cavity 7 through the liquid inlet 4. When the piston 6 moves to the right, the volume of the cavity 7 decreases, the pressure increases, the liquid inlet one-way valve 8 closes, the liquid outlet one-way valve 9 opens, and the liquid is discharged through the liquid outlet 5. The opening pressure of the one-way valve is adjusted by the magnetic force of the outer ring magnetic steel ring 13 and the piston magnetic steel 15. By rotating the magnetic steel nut shell 11, the distance between the outer ring magnetic steel ring 13 and the piston magnetic steel 15 can be changed, thereby adjusting the opening pressure of the one-way valve. When the liquid passes through the one-way valve, it passes through a plurality of flow guide grooves 14, ensuring smooth liquid flow and avoiding blockage. The device has the advantages of corrosion resistance, high pressure and large flow. In actual use, it can be used in industrial production where corrosive liquid needs to be extracted.

[0031] The motor 2 can select a direct current motor or a stepping motor, and select a suitable power and rotating speed according to actual application requirements. The motor is connected with the eccentric mechanism 3 through a shaft coupling, so that the stability of power transmission is ensured. The cavity 7 is designed to ensure that the ratio of the maximum volume to the minimum volume of the cavity is not less than 2 when the piston 6 reciprocates, so that sufficient liquid suction and discharge capacity is ensured. The inner wall of the cavity 7 should be smooth to reduce the resistance of liquid flow. In actual application, the distance between the outer ring magnetic steel ring 13 and the piston magnetic steel 15 can be adjusted by rotating the magnetic steel nut shell 11, so that the opening pressure of the one-way valve is changed. When adjusting, the viscosity and working pressure of the liquid should be appropriately adjusted to ensure the normal work of the one-way valve. The number and size of the flow guide grooves 14 should be optimized according to the flow and viscosity of the liquid to ensure smooth flow of the liquid through the one-way valve and avoid blockage. The total area of the flow guide grooves 14 should be the same as the area of the liquid inlet 4 to ensure the stability of the flow. The pump shell 1 and the one-way valve are made of nylon material by 3D printing, and have excellent corrosion resistance and mechanical strength. In actual application, different grades of nylon materials can be selected according to the corrosion of the liquid to further improve the corrosion resistance of the pump.

[0032] Maintenance and maintenance: since the various components of the pump are designed in a modular manner, maintenance and maintenance are very simple. Regularly check the wear of the piston 6 and the one-way valve, and replace the damaged parts in time, which can prolong the service life of the pump. The small plunger pump can effectively solve the problem of corrosive liquid delivery in the prior art, and has a wide application prospect.

[0033] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the mechanical parts and equipment adopt the conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here. The contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0034] In the description of the utility model, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. The meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation.

[0036] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can be first and second feature direct contact, or first and second feature indirectly contact through intermediate medium. Moreover, first feature is "on", "above" and "on" second feature, can be first feature is directly above or obliquely above second feature, or just indicate that first feature horizontal height is higher than second feature. First feature is "under", "below" and "under" second feature, can be first feature is directly below or obliquely below second feature, or just indicate that first feature horizontal height is less than second feature.

[0037] In the description of the specification, the description of the terms "an embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0038] The utility model discloses the embodiment figure in, only relate to the structure of the disclosure embodiment, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined mutually.

[0039] Although the utility model has been explained in detail with reference to the foregoing embodiments, for those skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A small size piston pump for corrosive liquids, characterized in that, It comprises a motor (2), an eccentric mechanism (3), and a pump head; the pump head comprises a pump shell (1), a piston (6), a cavity (7), an inlet (4), an outlet (5), and a one-way valve, which comprises an inlet one-way valve (8) arranged in the inlet (4) and an outlet one-way valve (9) arranged in the outlet (5).

2. A small bore piston pump for corrosive liquids according to claim 1, characterised in that The piston (6) reciprocates on the upper surface of the cavity (7), the left lower corner of the piston (6) is the inlet (4), and the right lower corner is the outlet (5); the cross-sectional areas of the inlet (4) and the outlet (5) are the same, and the corresponding inlet one-way valve (8) and outlet one-way valve (9) are arranged in the inlet (4) and outlet (5), respectively.

3. A small bore piston pump for corrosive liquids as claimed in claim 1 wherein, The piston (6) is a stainless steel piece with a Teflon material shell, which is connected to the cavity (7) through a fluorine rubber oil seal; when the piston (6) reciprocates, the ratio of the maximum volume to the minimum volume of the cavity (7) is not less than 2.

4. A small bore piston pump for corrosive liquids according to claim 3, wherein, The one-way valve is composed of an inlet channel (10), an outer ring magnetic steel ring (13), a magnetic steel nut shell (11), a flow guide groove (14), a piston magnetic steel (15), a liquid outlet (16), a nylon magnetic steel protection shell (12), and the flow guide groove (14); the outer ring magnetic steel ring (13) is sealed in the magnetic steel nut shell (11), which can be adjusted up and down through threads; the piston magnetic steel (15) is composed of a cylindrical magnetic steel sealed in a cylindrical nylon material.

5. A small bore piston pump for corrosive liquids according to claim 4, wherein, The magnetic steel in the outer ring magnetic steel ring (13) is different in polarity from the piston magnetic steel (15) with a circular ring-shaped magnetic steel built-in; adjusting the up-and-down position of the outer ring magnetic steel nut can change the opening pressure of the one-way valve.

6. A small bore piston pump for corrosive liquids as defined in claim 1, wherein The one-way valve is internally provided with multiple flow guide grooves (14), and the total area of the multiple flow guide grooves (14) is the same as the area of the inlet (4); when the valve is opened, the liquid flows to the liquid outlet (16) through the flow guide grooves (14).

7. A small bore piston pump for corrosive liquids as defined in claim 1 wherein, The piston (6) has independent cavities (7), inlets (4), outlets (5), inlet one-way valves (8), and outlet one-way valves (9) on both left and right sides; the input ends of the two left and right inlet one-way valves (8) are connected, and the output ends of the two left and right outlet one-way valves (9) are connected.

8. A small bore piston pump for corrosive liquids as defined in claim 1, wherein The one-way valve and the pump shell (1) are both made of nylon material through 3D printing.

Images