Constant-pressure grease feeder

Abstract

A grease constant-pressure feeder comprises a pressure storage cavity; the pressurizing air cylinder is arranged above the pressure storage cavity and connected with the pressure storage cavity, and the pressure storage cavity is pushed by the pressurizing air cylinder; the three-way ball valve is arranged below the pressure storage cavity; and the three-way ball valve is respectively connected with the pressure storage cavity, the medium inlet and the medium outlet. The grease constant-pressure feeder is connected in a system pipeline in series, the medium inlet is connected into the feeding port, and the medium outlet is connected into the tail end filling port. The grease constant-pressure feeder is reasonable in design and comprises the pressure storage cavity pushed by the pressurizing air cylinder, the three-way ball valve is additionally arranged at the inlet and the outlet of the pressure storage cavity, the outlet is closed when a medium enters the constant-pressure feeder, and otherwise, the inlet is closed when the outlet is opened. Therefore, the risk that the inlet pressure fluctuation affects the stability of the outlet pressure can be fundamentally eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of constant pressure feeding, in particular to a grease constant pressure feeder. Background Art

[0002] When using high-viscosity fluids (such as grease and glue), for mechanized production, it is often necessary to extract the medium from its original packaging and pressurize it to a certain pressure so that it can be transported a certain distance and then poured into the designated location of the product to be processed. Pumps are most commonly used due to their stability, durability, and high output pressure.

[0003] However, the reversal of the plunger during pressurized delivery will produce a large pressure fluctuation. In order to reduce the pressure fluctuation, the industry usually adds a pressure reducing and stabilizing valve in the pipeline to reduce the amplitude of the pressure fluctuation, improve the filling accuracy, and make the filling process uniform and continuous.

[0004] The core of a pressure-reducing and stabilizing valve is the frequent opening and closing of the steel ball and sealing ring at the valve core to maintain the combined outlet pressure and spring force equal to the inlet pressure. This ignores the frictional resistance of the valve core's upward and downward movement. This requires extremely high surface precision for the steel ball and sealing ring. Besides high machining accuracy and material strength requirements, they are also susceptible to abrasive impurities in the fluid, causing them to fail. Furthermore, due to its structural characteristics, the outlet pressure of a pressure-reducing and stabilizing valve is still affected by the inlet supply pressure.

[0005] Therefore, all the pressure reducing valves currently on the market can only reduce the pressure fluctuation range caused by the reversal of the plunger pump in different proportions but will not eliminate the problem at its root.

[0006] Aiming at the problems that the pressure reducing and stabilizing valve cannot truly eliminate pressure fluctuations and is easily affected by abrasive impurities and fails during use, the utility model develops a grease constant pressure feeder whose outlet pressure is not affected by the inlet system feed pressure. Utility Model Content

[0007] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of the utility model is to provide a constant pressure grease feeder with a reasonable design, including a pressure storage chamber driven by a booster cylinder and adding a three-way ball valve at the inlet and outlet of the pressure storage chamber. When the medium enters the constant pressure feeder, the outlet is closed, and conversely, when the outlet is opened, the inlet is closed, thereby fundamentally eliminating the risk of inlet pressure fluctuations affecting the stability of the outlet pressure, and has broad application prospects.

[0008] Technical solution: A grease constant pressure feeder, comprising:

[0009] Pressure storage chamber;

[0010] A booster cylinder, which is arranged above the pressure storage chamber and connected to the pressure storage chamber, and the pressure storage chamber is pushed by the booster cylinder;

[0011] A three-way ball valve is arranged below the pressure storage chamber; the three-way ball valve is connected to the pressure storage chamber, the medium inlet and the medium outlet respectively.

[0012] Furthermore, the above-mentioned grease constant pressure feeder is connected in series in the system pipeline, the medium inlet is connected to the feed port, and the medium outlet is connected to the terminal filling port.

[0013] The grease constant pressure feeder described in the present invention is rationally designed and achieves constant pressure feeding through the coordinated work of the boost cylinder, the pressure storage chamber, and the three-way ball valve. When the grease constant pressure feeder is connected in series in the system pipeline, the medium inlet is connected to the feed port of the system pipeline, and the medium outlet can be connected to the terminal filling port through a high-pressure hose. When the medium enters the grease constant pressure feeder, the three-way ball valve will close the outlet. At this time, the pressure storage chamber stores the medium and builds pressure under the push of the boost cylinder. When feeding is needed, the three-way ball valve opens the outlet and closes the inlet. The medium with a certain pressure stored in the pressure storage chamber flows to the terminal filling port through the medium outlet, thereby achieving constant pressure feeding.

[0014] The advantage of the above design is that by closing the outlet when the medium enters and closing the inlet when the outlet is open, the risk of inlet pressure fluctuations affecting the stability of outlet pressure can be fundamentally eliminated, ensuring the pressure stability of the end filling port, which is conducive to improving the accuracy and reliability of filling.

[0015] Furthermore, the grease constant-pressure feeder features a modular design with clearly defined functional components (pressure storage chamber, booster cylinder, and three-way ball valve). Installation simply requires connecting them in series within the system piping and properly connecting the media inlet and outlet. During maintenance, components can be easily inspected and replaced, reducing both cost and effort.

[0016] Furthermore, the above-mentioned grease constant pressure feeder further includes:

[0017] An air circuit precision pressure reducing valve is connected to the boost cylinder.

[0018] The primary function of a precision air pressure reducing valve is to precisely regulate the gas pressure entering the booster cylinder. This precise control of gas pressure allows for precise adjustment of the force exerted by the booster cylinder on the pressure storage chamber, thereby precisely controlling the pressure within the chamber. When varying grease supply pressures are required, the precision air pressure reducing valve can be adjusted to vary the booster cylinder's thrust, thus meeting varying operational requirements.

[0019] Furthermore, the above-mentioned grease constant pressure feeder further includes:

[0020] A controller is connected to the boost cylinder and the three-way ball valve respectively and controls the boost cylinder and the three-way ball valve.

[0021] The controller controls and coordinates the operation of various components. Based on preset parameters, it controls the action of the booster cylinder, pushing the pressure storage chamber to the set pressure. It also controls the opening and closing of the three-way ball valve, ensuring optimal storage and supply of media.

[0022] Furthermore, the above-mentioned grease constant pressure feeder further includes:

[0023] The booster cylinder, the pressure storage chamber and the three-way ball valve are fixed on the L-shaped bracket.

[0024] The beneficial effects of the utility model are:

[0025] (1) The constant pressure grease feeder described in the present invention comprises a pressure storage chamber driven by a booster cylinder and a three-way ball valve is added at the inlet and outlet of the pressure storage chamber. By closing the outlet when the medium enters and closing the inlet when the outlet is open, the risk of inlet pressure fluctuation affecting the stability of the outlet pressure is fundamentally eliminated, ensuring the pressure stability of the terminal filling port, which is conducive to improving the accuracy and reliability of filling;

[0026] (2) The grease constant pressure feeder described in the present invention adopts a modular design. During installation, it only needs to be connected in series in the system pipeline and the medium inlet and outlet are correctly connected. During maintenance, each component can also be easily inspected and replaced, reducing maintenance costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the grease constant pressure feeder of the utility model;

[0028] Figure 2 This is a front view of the constant pressure grease feeder of the present invention;

[0029] Figure 3 This is a side view of the constant pressure grease feeder of the present invention;

[0030] Figure 4 This is a top view of the constant pressure grease feeder of the present invention;

[0031] Figure 5 This is the medium output state after the conventional pressure reducing valve is connected to the system pipeline when the utility model is used;

[0032] Figure 6 This is the medium output state after the grease constant pressure feeder of this embodiment is connected to the system pipeline;

[0033] In the figure: grease constant pressure feeder 1, pressure storage chamber 11, pressure cylinder 12, three-way ball valve 13, medium inlet 14, medium outlet 15, gas path precision pressure reducing valve 16, controller 17, L-shaped support 18. DETAILED DESCRIPTION

[0034] The utility model is further illustrated below in combination with the accompanying drawings. Figure 1 、 2 , 3, 4 and examples 1, 2, further illustrate the utility model.

[0035] Example 1

[0036] As shown in Figure 1 、 2 , 3, 4, the grease constant pressure feeder comprises a pressure storage chamber 11 pushed by a pressure cylinder 12 and a three-way ball valve 13 added at the inlet and outlet of the pressure storage chamber 11.

[0037] In use, the grease constant pressure feeder 1 is connected in series in the system pipeline, the medium inlet 14 is connected to the feeding port of the system pipeline, and the medium outlet 15 can be connected to the terminal filling port through a high-pressure hose. When the medium enters the grease constant pressure feeder, the three-way ball valve 13 closes the outlet, at which time the pressure storage chamber 11 stores the medium and establishes pressure under the pushing of the pressure cylinder 12. When feeding is needed, the three-way ball valve 13 opens the outlet and closes the inlet, and the medium with certain pressure stored in the pressure storage chamber 11 flows to the terminal filling port through the medium outlet 15, so as to realize constant pressure feeding.

[0038] By closing the outlet when the medium enters and closing the inlet when the outlet is opened, the risk of the influence of inlet pressure fluctuation on outlet pressure stability can be fundamentally eliminated, and the pressure stability of the terminal filling port is ensured, which is beneficial to improving the filling precision and reliability.

[0039] Example 2

[0040] Based on the above structure of example 1, as shown in Figure 1 、 2 , 3, 4.

[0041] The grease constant pressure feeder further comprises a gas path precision pressure reducing valve 16, and the gas path precision pressure reducing valve 16 is connected with the pressure cylinder 12. The main function of the gas path precision pressure reducing valve 16 is to accurately adjust the gas pressure entering the pressure cylinder 12. Through accurate control of the gas pressure, the force of the pressure cylinder 12 pushing the pressure storage chamber 11 can be accurately adjusted, and then the pressure in the pressure storage chamber 11 can be accurately controlled.

[0042] Further, the oil constant pressure feeder 1 further comprises a controller 17 connected with the pressure cylinder 12 and the three-way ball valve 13 respectively and controls the pressure cylinder 12 and the three-way ball valve 13. The controller 17 plays a role of controlling and coordinating the work of each component. According to preset parameters, the controller 17 controls the action of the pressure cylinder 12 to push the pressure storage cavity 11 according to the set pressure requirement. Meanwhile, the controller 17 can also control the opening and closing state of the three-way ball valve 13 to ensure the storage and supply of medium at the right time.

[0043] Further, the oil constant pressure feeder 1 further comprises an L-shaped support 18, and the pressure cylinder 12, the pressure storage cavity 11, the three-way ball valve 13, the gas path precision pressure reducing valve 16 and the controller 17 are fixed on the L-shaped support 18 respectively.

[0044] Effect verification

[0045] Under the same working condition, the metering accuracy of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is tested.

[0046] The test results are as follows:

[0047] 1. The metering accuracy of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is shown in Table 1, the average value is 3.01, and the CMK value is 1.96 under the accuracy of ±10%.

[0048] Table 1

[0049] 2.98 3.04 2.98 2.99 2.96 3.06 3.02 2.96 2.99 3.04 3.02 2.98 3.07 2.94 2.96 3.07 3.02 2.85 2.98 3.02 3.01 3.06 2.94 3.07 2.96 3.04 3.04 3.04 2.98

[0050] 2. The metering accuracy of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is shown in Table 2, the average value is 2.95, and the CMK value is 2.07 under the accuracy of ±4%, and the metering accuracy is obviously improved.

[0051] Table 2

[0052] 2.99 2.99 2.98 2.99 2.98 2.96 2.96 2.96 2.95 2.96 2.97 2.95 2.99 2.96 2.97 2.96 3.00 2.95 2.96 2.98 2.95 2.94 2.95 2.93 2.97 2.95 2.94 2.96 2.94 2.93

[0053] Under the same working condition, the medium output state of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is tested.

[0054] The test results are as follows:

[0055] 1. The medium output state of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is shown in Table 3. Figure 5

[0056] 2. The medium output state of the system pipeline after the conventional pressure reducing valve is used as a comparative example and the oil constant pressure feeder of the embodiment is connected is shown in Table 4, compared with Figure 6 Figure 5 ​​The pressure fluctuation of the medium output after the grease constant pressure feeder of the embodiment is connected to the system pipeline is smaller than the medium output state after the conventional pressure reducing valve is connected to the system pipeline.

[0057] In summary, compared with the metering accuracy and the pressure fluctuation of the medium output, the effect is significantly improved after the constant pressure feeder of the embodiment is used to replace the conventional pressure reducing valve.

[0058] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principle of the present application, can make a number of improvements, these improvements should also be considered as the protection scope of the present application.

Claims

1. A grease constant pressure feeder, characterized in that: The grease constant pressure feeder (1) comprises: a pressure storage chamber (11); A boost cylinder (12), the boost cylinder (12) being arranged above the pressure storage chamber (11) and connected to the pressure storage chamber (11), the pressure storage chamber (11) being pushed by the boost cylinder (12); A three-way ball valve (13) is provided below the pressure storage chamber (11); the three-way ball valve (13) is respectively connected to the pressure storage chamber (11), the medium inlet (14), and the medium outlet (15).

2. The grease constant pressure feeder according to claim 1, characterized in that: The grease constant pressure feeder (1) is connected in series in the system pipeline, the medium inlet (14) is connected to the feed port, and the medium outlet (15) is connected to the terminal filling port.

3. The grease constant pressure feeder according to claim 1, characterized in that: Also includes: An air circuit precision pressure reducing valve (16), wherein the air circuit precision pressure reducing valve (16) is connected to the boost cylinder (12).

4. The grease constant pressure feeder according to claim 1, characterized in that: Also includes: A controller (17) is connected to the boost cylinder (12) and the three-way ball valve (13) respectively and controls the boost cylinder (12) and the three-way ball valve (13).

5. The grease constant pressure feeder according to claim 1, characterized in that: Also includes: An L-shaped bracket (18) is provided, and the booster cylinder (12), the pressure storage chamber (11), and the three-way ball valve (13) are fixed on the L-shaped bracket (18).

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