Improved high-pressure plunger pump

Abstract

The utility model relates to the technical field of high-pressure plunger pumps, in particular to an improved high-pressure plunger pump which comprises a high-pressure plunger pump body and an electrophoresis anti-corrosion coating at an internal flow channel part of a middle body, a lubricating structure is arranged on the high-pressure plunger pump body; a protective sleeve is arranged on the internal flow channel in a sleeving mode and located between the overflow valve mechanism and the internal flow channel. A sealing ring and a sealing gasket are arranged on the protective sleeve in a sleeving manner, and are positioned between the protective sleeve and the internal flow channel. The stainless steel protective sleeve is arranged between the overflow valve mechanism and the internal flow channel, so that the overflow valve mechanism does not rub an electrophoresis anti-corrosion coating on the internal flow channel when moving, and the phenomenon that the electrophoresis anti-corrosion coating in the internal flow channel falls off is prevented; and the service life of the high-pressure plunger pump is greatly prolonged while the overall corrosion resistance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure plunger pumps, in particular to an improved high-pressure plunger pump. Background Art

[0002] Similar high-pressure plunger pumps in the prior art have been publicly sold and disclosed by the applicant in the market, and the applicant applied for a utility model patent (application number: 202323031594.6) to the State Intellectual Property Office on November 10, 2023. The utility model patent specification also clearly records a fire-resistant, alkali-resistant, and corrosion-resistant high-pressure plunger pump, including a high-pressure plunger pump body, an intermediate body, an upper cover, a water inlet joint, a drainage joint, a transmission shaft, and a gear. The upper cover and the drainage joint are made of stainless steel, the water inlet joint is made of a fire-resistant, alkali-resistant engineering plastic part, and the internal flow channel of the intermediate body is electrophoretically coated with an anti-corrosion coating; the high-pressure plunger pump body is provided with a lubrication structure. The utility model improves the overall anti-corrosion performance and the maintenance quality.

[0003] However, in actual application, the applicant found that since the above-mentioned high-pressure plunger pump is equipped with an overflow valve mechanism within a certain part of the internal flow channel, and the overflow valve mechanism needs to move within the range of the internal flow channel, friction will be generated between the overflow valve mechanism and the internal flow channel due to the movement. After a long time, the electrophoretic anti-corrosion coating of the internal flow channel within this range will fall off. After the electrophoretic anti-corrosion coating falls off, the gap between the overflow valve mechanism and the internal flow channel becomes larger, making the sealing function ineffective, and the pressure in the high-pressure area will also drop, which will eventually cause the overflow valve mechanism of the high-pressure plunger pump to be unable to maintain a static equilibrium state, resulting in the overflow valve mechanism repeatedly opening and closing. Utility Model Content

[0004] The purpose of the utility model is to provide an improved high-pressure plunger pump in order to solve the above-mentioned problem, so as to prevent the electrophoretic anti-corrosion coating of the internal flow channel within the range of the overflow valve mechanism from falling off.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: an improved high-pressure plunger pump, including a high-pressure plunger pump body, an intermediate body, an upper cover, a water inlet joint, a drain joint, a transmission shaft and a gear, the upper cover and the drain joint are made of stainless steel, the water inlet joint is made of a fire-resistant alkali engineering plastic part, and the internal flow channel of the intermediate body is electrophoretically coated with an anti-corrosion coating; a lubrication structure is provided on the high-pressure plunger pump body; a protective sleeve is provided on the internal flow channel, and the protective sleeve is located between the overflow valve mechanism and the internal flow channel; a sealing ring and a sealing gasket are provided on the protective sleeve, and the sealing ring and the sealing gasket are located between the protective sleeve and the internal flow channel.

[0006] Wherein, the protective cover is made of metal material.

[0007] Wherein, the metal material is stainless steel.

[0008] Wherein, the protective sleeve is a cylindrical structure with an outer flange, the sealing ring is arranged close to the outer flange, and the sealing gasket is arranged close to the sealing ring.

[0009] Wherein, the sealing gasket is made of plastic material.

[0010] Wherein, the plastic material is polytetrafluoroethylene.

[0011] Wherein, the sealing ring is made of rubber material.

[0012] Compared with the prior art, the beneficial effect of the utility model is: by arranging a stainless steel protective cover between the overflow valve mechanism and the internal flow channel, the overflow valve mechanism will not rub the electrophoretic anti-corrosion coating on the internal flow channel when moving, thereby preventing the electrophoretic anti-corrosion coating in the internal flow channel from falling off, while ensuring the overall anti-corrosion performance, it also greatly improves the service life of the high-pressure plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 It is a schematic diagram of a first partial cross-sectional enlarged structure of the utility model;

[0016] Figure 4 It is a second partial cross-sectional enlarged structural schematic diagram of the utility model;

[0017] Figure 5 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] The specific implementation of this embodiment is further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate this embodiment, but are not used to limit the scope of this embodiment.

[0019] The high pressure plunger pump of this embodiment is as follows Figures 1 to 5As shown, it includes a high-pressure plunger pump body 1, an intermediate body 2, an upper cover 11, a water inlet joint 3, a drain joint 4, a transmission shaft 5 and a gear 8. The upper cover and the drain joint are made of stainless steel, the water inlet joint is made of refractory alkali engineering plastics, and the internal flow channel 12 of the intermediate body 2 is electrophoretically coated with an anti-corrosion coating, thereby improving the overall anti-corrosion performance; a lubrication structure is provided on the high-pressure plunger pump body 1. An intermediate body is provided on the high-pressure plunger pump body; a water inlet joint and a drain joint are provided on the intermediate body, the upper cover is fixed to the side of the intermediate body away from the high-pressure plunger pump body, the transmission shaft is rotatably connected to the high-pressure plunger pump body, the end of the transmission shaft is in a "convex" shape, and a gear is provided on the transmission shaft. In this embodiment, a bearing 7 is sleeved on the transmission shaft, and the bearing is in contact with the gear.

[0020] A protective sleeve 100 is sleeved on the internal flow channel, and the protective sleeve is located between the overflow valve mechanism 103 and the internal flow channel; a sealing ring 101 and a sealing gasket 102 are sleeved on the protective sleeve, and the sealing ring is made of rubber material. The sealing ring and the sealing gasket are located between the protective sleeve and the internal flow channel. The protective sleeve is a cylindrical structure with an outer flange 104, and the sealing ring is arranged close to the outer flange, and the sealing gasket is arranged close to the sealing ring. The sealing gasket is made of a plastic material, and the plastic material is polytetrafluoroethylene. When the high-pressure water gun is turned off, the water pressure will continue to increase to squeeze the sealing ring, and the sealing ring will squeeze the sealing gasket. Since the sealing gasket is made of polytetrafluoroethylene, the sealing gasket will also be deformed after being squeezed by the sealing ring, but the deformation is very small, so to a certain extent, the sealing ring is prevented from being damaged after being squeezed.

[0021] The protective cover in this embodiment is made of metal material, and the metal material is stainless steel.

[0022] The utility model is connected to a high-pressure water gun (not shown in the figure) when in use. When the high-pressure water gun is turned off, the high-pressure plunger pump will continue to work and the water pressure will continue to increase. At this time, the high-pressure water will push the overflow valve mechanism to release the pressure. While releasing the pressure, the overflow valve mechanism will push the push rod to cut off the pressure switch, thereby cutting off the power supply of the high-pressure plunger pump, so that the water pressure stops increasing. The overflow valve mechanism is also connected to a main water outlet valve, which will maintain the pressure of the high-pressure water gun and the overflow valve mechanism from decreasing. The pressure will maintain the overflow valve mechanism in a static equilibrium state. Therefore, this embodiment effectively ensures that the sealing function does not fail by providing a protective sleeve, a sealing ring, and a sealing gasket, and maintains the overflow valve mechanism in a static equilibrium state to a great extent.

[0023] In this embodiment, a stainless steel protective cover is arranged between the overflow valve mechanism and the internal flow channel, so that the overflow valve mechanism will not rub the electrophoretic anti-corrosion coating on the internal flow channel when moving, thereby preventing the electrophoretic anti-corrosion coating in the internal flow channel from falling off. While ensuring the overall anti-corrosion performance, it also greatly improves the service life of the high-pressure plunger pump.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An improved high-pressure plunger pump, comprising a high-pressure plunger pump body (1), an intermediate body (2), an upper cover (11), a water inlet joint (3), a water outlet joint (4), a transmission shaft (5) and a gear (8), wherein the upper cover and the water outlet joint (4) are made of stainless steel, the water inlet joint (3) is made of a fire-resistant alkali engineering plastic part, and the internal flow channel (12) of the intermediate body (2) is electrophoretically coated with an anti-corrosion coating; a lubrication structure is provided on the high-pressure plunger pump body (1); Features: A protective sleeve (100) is sleeved on the internal flow channel (12), and the protective sleeve is located between the overflow valve mechanism and the internal flow channel (12); a sealing ring (101) and a sealing gasket (102) are sleeved on the protective sleeve, and the sealing ring and the sealing gasket are located between the protective sleeve and the internal flow channel.

2. The improved high-pressure plunger pump according to claim 1, characterized in that: The protective cover is made of metal material.

3. The improved high-pressure plunger pump according to claim 2, characterized in that: The metal material is stainless steel.

4. The improved high-pressure plunger pump according to claim 1, characterized in that: The protective sleeve is a cylindrical structure with an outer flange, the sealing ring is arranged close to the outer flange, and the sealing gasket is arranged close to the sealing ring.

5. The improved high-pressure plunger pump according to claim 4, characterized in that: The sealing gasket is made of plastic material.

6. The improved high-pressure plunger pump according to claim 5, characterized in that: The plastic material is polytetrafluoroethylene.

7. The improved high-pressure plunger pump according to claim 1, characterized in that: The sealing ring is made of rubber material.

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