Plunger water pump with good sealing performance

Abstract

The utility model discloses a plunger water pump with good sealing performance, which comprises a pump body, a cylinder body, a plunger shaft and a water seal fixing cover, the cylinder body is arranged on the pump body, the water seal fixing cover is arranged in the cylinder body, an auxiliary water seal and a main water seal are sequentially arranged in the water seal fixing cover, and the plunger shaft is arranged in the main water seal. The auxiliary water seal and the main water seal are both made of high-abrasion-resistance rubber, a channel communicated with the interior of the water seal fixing cover is arranged in the cylinder body, a one-way valve is installed in the channel, the plunger shaft is sleeved with a mirror surface ceramic sleeve, the mirror surface ceramic sleeve is arranged in the main water seal and the auxiliary water seal, and the main water seal is arranged in the main water seal. The main water seal and the auxiliary water seal which are made of high-abrasion-resistance rubber are adopted, the mirror surface ceramic sleeve is combined, the sealing degree in the cylinder body cavity is guaranteed, the abrasion resistance of the main water seal and the auxiliary water seal is improved, and the service life of the water pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a plunger pump with good sealing performance. Background Technique

[0002] A water pump is a machine for transporting liquids or increasing the pressure of liquids. It transmits the mechanical energy of the prime mover or other external energy to the liquid, increasing the energy of the liquid. It is mainly used to transport liquids including water, oil, acid-base solutions, emulsions, suspension emulsions, and liquid metals, etc. A plunger pump relies on the reciprocating movement of the plunger in the cylinder body to change the volume of the sealed working cavity to achieve liquid suction and liquid pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation. However, due to the long-term friction between the plunger shaft and the water seal in the cylinder body, the sealing performance of the existing plunger pump decreases, and it is easy to infiltrate into the motor from the connection of the plunger shaft during water absorption, resulting in poor contact of the motor and inability to work normally, greatly reducing the service life of the motor, and there is room for improvement in the suction of the water pump. Content of the Utility Model

[0003] In order to solve the problems in the above background technique, the utility model provides a plunger pump with good sealing performance.

[0004] The utility model adopts the following technical scheme: A plunger pump with good sealing performance, including a pump body, a cylinder body, a plunger shaft, and a water seal fixing cover. The cylinder body is installed on the pump body. It is characterized in that: The water seal fixing cover is installed in the cylinder body. A secondary water seal and a primary water seal are sequentially arranged in the water seal fixing cover. Both the secondary water seal and the primary water seal are made of highly wear-resistant rubber. A channel communicating with the inside of the water seal fixing cover is provided in the cylinder body. A one-way valve is installed in the channel. A mirror ceramic sleeve is sleeved outside the plunger shaft. The mirror ceramic sleeve is placed between the primary water seal and the secondary water seal.

[0005] Preferably, the pump body includes two pump bodies symmetrically arranged up and down. The plunger shaft is horizontally movably installed between the two pump bodies. The pump bodies are symmetrically installed on the cylinder body in the horizontal direction. A horizontal water channel is provided in the pump body. Both ends of the water channel are respectively communicated with the channels in the cylinder body.

[0006] Preferably, openings with internal threads are provided on both sides of the pump body. The openings are communicated with the channels in the cylinder body. A plug screw is detachably installed at one of the openings.

[0007] Preferably, one-way valves are installed at both ends of the channels in the cylinder body.

[0008] Preferably, an active motor is fixed outside the pump body, and an eccentric wheel for driving the plunger shaft to reciprocate is fixed to the output shaft of the active motor.

[0009] Preferably, a rolling bearing is sleeved outside the eccentric wheel. The inner ring of the rolling bearing is fixedly connected to the eccentric wheel, and the outer ring of the rolling bearing is fixedly connected to the plunger shaft.

[0010] Preferably, a sealing ring is installed between the auxiliary water seal and the water seal fixing cover.

[0011] Preferably, copper gaskets are provided between the main water seal and the auxiliary water seal and between the main water seal and the cylinder block.

[0012] Preferably, the water channels in the pump body and the cylinder block are made of a stainless steel inner sleeve.

[0013] Preferably, the pump body and the cylinder block are wrapped with an aluminum alloy layer.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By using the main water seal and the auxiliary water seal made of highly wear-resistant rubber, the wear resistance of the main water seal and the auxiliary water seal is ensured. Combined with the mirror ceramic sleeve, the sealing degree in the cylinder cavity is guaranteed, the service life of the water pump is improved, and leakage from the connection part of the plunger shaft during water absorption is prevented.

[0016] 2. The present utility model drives the plunger shaft through an active motor to drive the mirror ceramic sleeve to reciprocate in the main water seal and the auxiliary water seal, realizing the suction effect in the cylinder block. And by symmetrically arranging two cylinder blocks, the suction flow rate is increased, realizing high-flow self-priming pumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded schematic view of the overall structure of the present utility model;

[0018] Figure 2 is a schematic view of the overall structure of the present utility model;

[0019] Figure 3 is a schematic cross-sectional view of the pump body and the cylinder block of the present utility model.

[0020] In the figure: 1, active motor; 2, eccentric wheel; 3, rolling bearing; 4, check valve; 5, cylinder block; 6, copper gasket; 7, main water seal; 8, auxiliary water seal; 9, sealing ring; 10, water seal fixing cover; 11, mirror ceramic sleeve; 12, plunger shaft; 13, plug screw; 14, pump body. DETAILED DESCRIPTION OF THE INVENTION

[0021] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figures 1-3 , the present utility model provides a plunger pump with good sealing performance, which includes a pump body 14, a cylinder block 5, a plunger shaft 12 and a water seal fixing cover 10. The cylinder block 5 is installed on the pump body 14. It is characterized in that: the water seal fixing cover 10 is installed in the cylinder block 5. A secondary water seal 8 and a primary water seal 7 are successively arranged in the water seal fixing cover 10. Both the secondary water seal 8 and the primary water seal 7 are made of highly wear-resistant rubber. The primary water seal 7 and the secondary water seal 8 made of highly wear-resistant rubber ensure the wear resistance of the primary water seal 7 and the secondary water seal 8. A channel communicating with the inside of the water seal fixing cover 10 is provided in the cylinder block 5. A check valve 4 is installed in the channel. A mirror ceramic sleeve 11 is sleeved outside the plunger shaft 12. The mirror ceramic sleeve 11 is placed between the primary water seal 7 and the secondary water seal 8. The mirror ceramic sleeve 11 ensures the sealing degree in the cavity of the cylinder block 5, improves the service life of the pump, and prevents leakage from the connection of the plunger shaft 12 during water absorption.

[0025] Please refer specifically to Figures 1-3, the pump body 14 includes two pump bodies 14 symmetrically arranged up and down. The plunger shaft 12 is horizontally movably installed between the two pump bodies 14. The pump bodies 14 are symmetrically installed on the cylinder block 5 in the horizontal direction. A water passage is horizontally arranged in the pump body 14. Both ends of the water passage communicate with the passages in the cylinder block 5 respectively. Openings with internal threads are provided on both sides of the pump body 14. The openings communicate with the passages in the cylinder block 5. A plug screw 13 is detachably installed in one of the openings. The opening on the other side of the upper pump body 14 serves as the water inlet, and the opening on the other side of the lower pump body 14 serves as the water outlet. Check valves 4 are installed at both ends of the passages in the cylinder block 5, so that the passages form a structure of one suction and one discharge.

[0026] Please refer specifically to Figures 1-3 , a driving motor 1 is fixed outside the pump body 14. An eccentric wheel 2 that drives the plunger shaft 12 to reciprocate is fixed to the output shaft of the driving motor 1. By driving the plunger shaft 12 through the driving motor 1, the mirror ceramic sleeve 11 is driven to reciprocate in the main water seal 7 and the secondary water seal 8, realizing the suction function in the cylinder block 5. And by two symmetrically arranged cylinder blocks 5, the suction flow rate is increased, realizing high-flow self-priming pumping.

[0027] Please refer specifically to Figure 1 , a rolling bearing 3 is sleeved outside the eccentric wheel 2. The inner ring of the rolling bearing 3 is fixedly connected to the eccentric wheel 2, and the outer ring of the rolling bearing 3 is fixedly connected to the plunger shaft 12, improving the smoothness of the reciprocating motion of the plunger shaft 12.

[0028] Please refer specifically to Figure 1 , a sealing ring 9 is installed between the secondary water seal 8 and the water seal fixing cover 10. Copper gaskets 6 are provided between the main water seal 7 and the secondary water seal 8 and between the main water seal 7 and the cylinder block 5, further improving the sealing performance inside the cylinder block 5.

[0029] Please refer specifically to Figure 1 , the water passages in the pump body 14 and the cylinder block 5 adopt stainless steel inner sleeves, and the pump body 14 and the cylinder block 5 are wrapped with aluminum alloy layers, enhancing the corrosion resistance of the pump body 14 and the cylinder block 5 and further increasing the service life.

[0030] The working principle of the present utility model is as follows:

[0031] The output shaft of the driving motor 1 drives the eccentric wheel 2 to rotate, and the eccentric wheel 2 drives the plunger shaft 12 to reciprocate horizontally, so as to realize the reciprocating movement of the plunger shaft 12 driving the mirror ceramic sleeve 11 in the channel of the cylinder block 5. The main water seal 7 and the secondary water seal 8 made of highly wear-resistant rubber ensure the sealing degree in the cavity of the cylinder block 5 and extend the service life. During the reciprocating movement of the mirror ceramic sleeve 11 in the cylinder block 5, when the mirror ceramic sleeve 11 moves away from the cylinder block 5, a suction force is generated inside the cylinder block 5, and at the same time, a suction force is generated in the water passage in the upper pump body 14. Water enters the upper pump body 14 from the opening of the upper pump body 14 and is sucked into the cylinder block 5 at both ends of the pump body 14 through the one-way valve 4 at the upper part of the cylinder block 5. When the mirror ceramic sleeve 11 moves close to the cylinder block 5, the mirror ceramic sleeve 11 squeezes the space inside the cylinder block 5, so as to squeeze out the water inside the cylinder block 5 through the one-way valve 4 at the lower part of the cylinder block 5 and enter the lower pump body 14, and is discharged through the opening of the lower pump body 14. The reciprocating cycle realizes the pumping operation of the water pump.

[0032] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A plunger water pump with good sealing performance, comprising a pump body (14), a cylinder body (5), a plunger shaft (12) and a water seal fixing cover (10), wherein the cylinder body (5) is mounted on the pump body (14), characterized in that: The water seal fixing cover (10) is installed in the cylinder body (5), and a secondary water seal (8) and a main water seal (7) are arranged in sequence in the water seal fixing cover (10), and the secondary water seal (8) and the main water seal (7) are both made of highly wear-resistant rubber. The cylinder body (5) is provided with a channel connected to the inside of the water seal fixing cover (10), and a one-way valve (4) is installed in the channel. The piston shaft (12) is provided with a mirror ceramic sleeve (11) on its outer sleeve, and the mirror ceramic sleeve (11) is placed in the main water seal (7) and the secondary water seal (8).

2. A plunger water pump with good sealing performance according to claim 1, characterized in that: The pump body (14) comprises two pump bodies (14) symmetrically arranged in an upper and lower direction, the plunger shaft (12) is horizontally movably installed between the two pump bodies (14), the pump body (14) is symmetrically installed on the cylinder body (5) in a horizontal direction, and a horizontally arranged water channel is provided in the pump body (14), and both ends of the water channel are respectively connected to the channels in the cylinder body (5).

3. A plunger water pump with good sealing performance according to claim 2, characterized in that: Openings with internal threads are provided on both sides of the pump body (14), and the openings are communicated with the channel in the cylinder body (5), and a plug screw (13) is detachably installed on one of the openings.

4. A plunger water pump with good sealing performance according to claim 3, characterized in that: One-way valves (4) are installed at the channel openings at both ends of the channel in the cylinder body (5).

5. A plunger water pump with good sealing performance according to claim 4, characterized in that: An active motor (1) is fixed outside the pump body (14), and an eccentric wheel (2) for driving the plunger shaft (12) to move back and forth is fixed to the output shaft of the active motor (1).

6. A plunger water pump with good sealing performance according to claim 5, characterized in that: The outer sleeve of the eccentric wheel (2) is provided with a rolling bearing (3), the inner ring of the rolling bearing (3) is fixedly connected to the eccentric wheel (2), and the outer ring of the rolling bearing (3) is fixedly connected to the plunger shaft (12).

7. A plunger water pump with good sealing performance according to claim 1, characterized in that: A sealing ring (9) is installed between the secondary water seal (8) and the water seal fixing cover (10).

8. A plunger water pump with good sealing performance according to claim 7, characterized in that: Copper gaskets (6) are provided between the main water seal (7) and the secondary water seal (8) and between the main water seal (7) and the cylinder body (5).

9. A plunger water pump with good sealing performance according to claim 1, characterized in that: The water passages in the pump body (14) and the cylinder body (5) are made of stainless steel inner sleeves.

10. A plunger water pump with good sealing performance according to claim 9, characterized in that: The pump body (14) and the cylinder body (5) are wrapped with an aluminum alloy layer.

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