Plunger pump inlet air damper

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a plunger pump inlet air shock absorber. The device comprises a gas storage cavity arranged at the upper end and a water storage cavity arranged at the lower end, wherein the lower end of the gas storage cavity is communicated with the upper part of the water storage cavity; the upper end of the air storage cavity is connected with an air supply system through an inflation valve, and an air stabilizing plate is correspondingly arranged at the air outlet end of the inflation valve. The side wall of the lower end of the air storage cavity is connected with an exhaust valve; a lower pressure stabilizing plate is arranged on the lower portion of the water storage cavity corresponding to the water inlet end, and an upper pressure stabilizing scraper is arranged on the upper portion of the water storage cavity corresponding to the water outlet end. According to the utility model, water at the inlet of the plunger pump can be damped, the pressure is stabilized, the whole damper is resistant to high temperature, the capsule does not need to be replaced, maintenance is avoided, and the later replacement and maintenance cost is reduced.

Description

Technical fields:

[0001] This utility model relates to the field of plunger pump technology, and in particular to a plunger pump inlet air damper. Background technology:

[0002] Because plunger pumps draw in production water through the reciprocating motion of multiple plunger rods, inlet water pressure fluctuations are caused. Therefore, an inlet shock absorber is generally installed at the inlet to provide stable pressure for the plunger pump. Existing inlet shock absorbers are air-bag type, with a cylindrical bladder installed inside the water storage chamber. This bladder is made of wear-resistant and shock-absorbing polyurethane material and filled with 0.6-0.8 MPa compressed air to eliminate fluctuations in water volume and pressure within the storage chamber.

[0003] In recent years, the oilfield company has eliminated water treatment devices in its steam injection boiler system and uniformly supplies high-temperature softened wastewater at a temperature of 80℃. The existing airbag shock absorbers are not designed for high-temperature wastewater. The polyurethane airbags are exposed to high temperatures for a long time, and the high-temperature oxidation accelerates the aging of the internal rubber. Over time, their elasticity gradually weakens, causing the compression and extension characteristics of the inlet shock absorber to decline, resulting in the loss of shock absorption function. This causes severe vibration in the plunger pump inlet pipeline, posing a great threat to safe and stable production and increasing material costs.

[0004] Existing capsule-type shock absorbers suffer from problems due to the capsule material's inability to withstand high temperatures. As a result, the internal shock-absorbing capsules, which were originally replaced every 2-3 years, often fail within a month of operation, requiring frequent replacements. This poses a significant threat to the safe and stable operation of the equipment and increases material costs. Custom-made capsules with shock absorption, wear resistance, and high-temperature resistance involve complex manufacturing processes, high production costs, and require outsourcing to specialized rubber manufacturers, ultimately leading to lower economic benefits. Utility model content:

[0005] The technical problem to be solved by this utility model is to provide an air damper for the inlet of a plunger pump. This device can dampen the water at the inlet of the plunger pump and stabilize the pressure. At the same time, the damper is resistant to high temperature, does not require replacement of the capsule, is maintenance-free, and reduces the cost of replacement and maintenance in the later stage.

[0006] The technical solution adopted by this utility model is: a plunger pump inlet air damper, including an air storage cavity at the upper end and a water storage cavity at the lower end, with the lower end of the air storage cavity connected to the upper part of the water storage cavity;

[0007] The upper end of the air storage chamber is connected to the air supply system via an inflation valve, which can supply compressed air; a stabilizing plate is correspondingly provided at the air outlet of the inflation valve, and the stabilizing plate is connected to the upper side wall of the air storage chamber; an exhaust valve is connected to the lower side wall of the air storage chamber.

[0008] The water storage cavity is provided with an inlet and an outlet at both ends in the horizontal direction. A lower pressure stabilizing plate is provided at the lower part of the water storage cavity corresponding to the inlet, and an upper pressure stabilizing scraper is provided at the upper part of the water storage cavity corresponding to the outlet.

[0009] Furthermore, the gas storage cavity has a cylindrical structure, with a length of 750mm and a diameter of 260mm.

[0010] Furthermore, the water storage cavity has a cylindrical structure, with a length of 600mm and a diameter of 300mm.

[0011] Furthermore, the lower end of the gas storage chamber is connected to the upper side wall of the water storage chamber via a flange.

[0012] Furthermore, the air supply system is an air compressor.

[0013] Furthermore, the water inlet and outlet of the water storage cavity are respectively provided with connecting flanges.

[0014] Furthermore, the gas storage chamber, water storage chamber, lower pressure stabilizing plate, upper pressure stabilizing scraper, and gas stabilizing plate are all made of stainless steel.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model is made of stainless steel, which is resistant to high temperature, requires no capsule replacement, is maintenance-free, and reduces the cost of replacement and repair in the later stage.

[0017] 2. This utility model adopts an upper pressure stabilizing scraper and a lower pressure stabilizing plate, which can not only stabilize the fluctuation of water pressure in the cavity, but also block the gas generated in the pipeline, ensuring that the production water entering the plunger pump is free of air bubbles and preventing pump body cavitation.

[0018] 3. This utility model adopts an air stabilizing plate, which allows compressed air to fill the air chamber smoothly during inflation, preventing compressed air from entering the water storage chamber in bundles.

[0019] 4. This utility model uses an exhaust valve, which allows you to observe whether the inflation volume meets the requirements. Attached image description:

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed implementation method:

[0022] like Figure 1 As shown, a plunger pump inlet air damper includes an air storage chamber 1 at the upper end and a water storage chamber 2 at the lower end, with the lower end of the air storage chamber 1 connected to the upper part of the water storage chamber 2.

[0023] The upper end of the air storage chamber 1 is connected to the air supply system via an inflation valve 5, which supplies compressed air. A stabilizing plate 6 is correspondingly installed at the outlet of the inflation valve 5, and the stabilizing plate 6 is connected to the upper side wall of the air storage chamber 1. An exhaust valve 7 is connected to the lower side wall of the air storage chamber 1. The inflation valve 5 allows for the connection of an air compressor to supplement compressed air to the air storage chamber 1, whether the chamber is stopped or running. The stabilizing plate 6 ensures that compressed air smoothly fills the air storage chamber 1 during inflation, preventing compressed air from entering the water storage chamber 2 in bundles. The exhaust valve 7 is slightly open during inflation; if air comes out of the valve, it indicates that the air storage chamber 1 is full.

[0024] The water storage chamber 2 has an inlet and an outlet at its horizontal ends, respectively. A lower pressure stabilizing plate 3 is installed at the lower part of the water storage chamber 2 corresponding to the inlet, and an upper pressure stabilizing scraper 4 is installed at the upper part of the water storage chamber 2 corresponding to the outlet. The lower pressure stabilizing plate 3 reduces water flow fluctuations within the water storage chamber 2. The upper pressure stabilizing scraper 4 reduces water flow fluctuations within the water storage chamber 2 and scrapes away residual gas, preventing air from entering the plunger pump and causing cavitation.

[0025] The gas storage chamber 1 has a cylindrical structure, with a length of 750 mm and a diameter of 260 mm.

[0026] The water storage cavity 2 has a cylindrical structure, with a length of 600mm and a diameter of 300mm.

[0027] This utility model air shock absorber is suitable for shock absorption of piston pumps with a displacement of 1-25 cubic meters. If the displacement exceeds the above range, the size of the air shock absorber needs to be redesigned.

[0028] The lower end of the gas storage chamber 1 is connected to the upper side wall of the water storage chamber 2 via a flange.

[0029] The air supply system is an air compressor.

[0030] The water storage cavity 2 is equipped with connecting flanges at its inlet and outlet ends.

[0031] The gas storage chamber 1, water storage chamber 2, lower pressure stabilizing plate 3, upper pressure stabilizing scraper 4, and gas stabilizing plate 6 are all made of stainless steel.

[0032] Operating Principle: After the production water enters the water storage chamber 2, the upper pressure stabilizing scraper 4 and the lower pressure stabilizing plate 3 reduce the pulse pressure generated at the plunger pump inlet. Excess water enters the air storage chamber 1 and reaches a balanced level with compressed air at the exhaust valve 7. Because the plunger pump draws in production water through the reciprocating motion of the plunger, the pressure in the water storage chamber 2 fluctuates. When the water pressure decreases, water remaining in the air storage chamber 1 enters the water storage chamber 2 to fill it. When the water pressure increases, the water level in the air storage chamber 1 rises, slightly above the exhaust valve 7, to replenish the water when the pressure drops again. During this period, the water pressure fluctuations cause severe vibrations, which are absorbed by the expansion and contraction of the compressed air in the air storage chamber 1. The upper pressure stabilizing scraper 4 and the lower pressure stabilizing plate 3 in the water storage chamber 2 provide additional damping. Finally, the stabilized water passes through the upper pressure stabilizing scraper 4 to further remove residual air before entering the plunger pump.

[0033] This device applies the principles of aerodynamics and elasticity from physics. The basic working principle of an air shock absorber is to compress air or gas into a sealed container, then utilize the compression and expansion of the gas to absorb and release energy, thereby achieving a damping effect. When an external impact force is transmitted to the shock absorber, the gas inside is compressed, forming a high-pressure wave. This high-pressure wave propagates through the gas and interacts with the gas molecules. In this process, the kinetic energy of the gas molecules is converted into heat energy, thus raising the temperature of the gas. When the gas expands, it absorbs heat and releases energy, thereby achieving the damping effect.

[0034] This utility model product was installed at the inlet of the plunger pump of the 11.2T and 23T oilfield steam generators. After the initial gas filling, the two boilers ran for one steam injection cycle, which was 12 days and 10 days respectively. The pressure gauge readings were stable, and no gas replenishment operation was required during operation.

[0035] This utility model product was installed in a 23T steam injection well boiler. After 26 days of operation, the inlet pressure of the plunger pump fluctuated. After on-site gas replenishment, the pressure gauge stabilized. Following the achievement of the expected test results, the inlet shock absorbers of 81 steam injection boilers at the special oil development company were successively replaced. After three months of observation, the overall gas replenishment cycle was between 20 and 28 days. The manufacturing and installation cost of a single shock absorber was 2500 yuan. Because the shock absorber is entirely made of stainless steel, the cost of subsequent maintenance and replacement parts was avoided.

[0036] The original capsule shock absorber cost 2,000 yuan to purchase. After using high-temperature wastewater, each boiler needs to replace about 10-11 shock absorber capsules per year, resulting in high material costs and potential equipment hazards due to material shortages. This new invention solves the problem and can save on future material purchases.

[0037] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A plunger pump inlet air damper, characterized in that: It includes a gas storage chamber (1) at the upper end and a water storage chamber (2) at the lower end, with the lower end of the gas storage chamber (1) connected to the upper part of the water storage chamber (2); The upper end of the air storage chamber (1) is connected to the air supply system through an air filling valve (5), and the air supply system can supply compressed air; a gas stabilizing plate (6) is provided at the outlet end of the air filling valve (5), and the gas stabilizing plate (6) is connected to the upper side wall of the air storage chamber (1); an exhaust valve (7) is connected to the lower side wall of the air storage chamber (1). The water storage cavity (2) has an inlet and an outlet at its two ends in the horizontal direction, respectively. A lower pressure stabilizing plate (3) is provided at the lower part of the water storage cavity (2) corresponding to the inlet, and an upper pressure stabilizing scraper (4) is provided at the upper part of the water storage cavity (2) corresponding to the outlet.

2. The plunger pump inlet air damper according to claim 1, characterized in that: The gas storage chamber (1) is a cylindrical structure with a length of 750 mm and a diameter of 260 mm.

3. The plunger pump inlet air damper according to claim 1, characterized in that: The water storage cavity (2) is a cylindrical structure with a length of 600 mm and a diameter of 300 mm.

4. The plunger pump inlet air damper according to claim 1, characterized in that: The lower end of the gas storage chamber (1) is connected to the upper side wall of the water storage chamber (2) by a flange.

5. The plunger pump inlet air damper according to claim 1, characterized in that: The air supply system is an air compressor.

6. The plunger pump inlet air damper according to claim 1, characterized in that: The water storage cavity (2) is equipped with connecting flanges at its inlet and outlet ends.

7. The plunger pump inlet air damper according to claim 1, characterized in that: The gas storage chamber (1), water storage chamber (2), lower pressure stabilizing plate (3), upper pressure stabilizing scraper (4), and gas stabilizing plate (6) are all made of stainless steel.

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