Emulsion high-pressure descaling pump set with self-cleaning filter

Abstract

The present invention provides an emulsion high-pressure descaling supply pump assembly with a self-cleaning filter, comprising an emulsion tank, a supply pump assembly, and a descaling spray device; the output end of the emulsion tank is connected to the descaling spray device via the supply pump assembly; the output end of the descaling spray device flows back to the emulsion tank; the supply pump assembly comprises a centrifugal booster pump, a self-cleaning filter, and a high-voltage motor pump assembly; the centrifugal booster pump is connected to the output end of the emulsion tank; the input end of the self-cleaning filter is connected to the centrifugal booster pump, the first output end of the self-cleaning filter is connected to the high-voltage motor pump assembly, and the second output end of the self-cleaning filter is connected to the emulsion tank; the output end of the high-voltage motor pump assembly is connected to the descaling spray device. The emulsion high-pressure descaling supply pump assembly with a self-cleaning filter of the present invention can prevent impurities and metal particles in the emulsion from entering the pump assembly and can be widely used in descaling devices in non-ferrous copper rod rolling mill production lines, high-speed wire and steel pipe rolling production lines.

Description

Technical Field

[0001] The invention relates to the field of an emulsion high-pressure descaling liquid supply pump group, in particular to an emulsion high-pressure descaling liquid supply pump group with a self-cleaning filter. Background Art

[0002] High-pressure water / emulsion descaling units are widely used in hot rolling processes in the steel and nonferrous metallurgy industries. Located between the heating furnace outlet and the intermediate rolling mill, their primary function is to remove oxide scale from the surface of the hot billet using high-pressure water / emulsion, ensuring thorough descaling before entering the rolling mill. This is a crucial point in product quality control. Incomplete descaling can lead to the intrusion of oxide scale during rolling, resulting in product quality issues. Existing high-pressure water / emulsion descaling units lack a self-cleaning mechanism, allowing impurities and metal particles in the emulsion to enter the pump unit, impacting its operation. Summary of the Invention

[0003] In response to the above-mentioned deficiencies in the prior art, the present invention provides an emulsion high-pressure descaling liquid supply pump group with a self-cleaning filter, which can prevent impurities and metal particles in the emulsion from entering the pump group. It can be widely used in descaling devices of non-ferrous copper rod rolling mill production lines, high-speed wire and steel pipe rolling production lines.

[0004] In order to achieve the above-mentioned objectives, the present invention provides an emulsion high-pressure descaling liquid supply pump group with a self-cleaning filter, comprising an emulsion tank, a liquid supply pump group and a descaling injection device; the output end of the emulsion tank is connected to the descaling injection device through the liquid supply pump group; the output end of the descaling injection device flows back to the emulsion tank; the liquid supply pump group comprises a centrifugal booster pump, a self-cleaning filter and a high-voltage motor pump group; the centrifugal booster pump is connected to the output end of the emulsion tank; the input end of the self-cleaning filter is connected to the centrifugal booster pump, the first output end of the self-cleaning filter is connected to the high-voltage motor pump group, and the second output end of the self-cleaning filter is connected to the emulsion tank; the output end of the high-voltage motor pump group is connected to the descaling injection device.

[0005] Preferably, the liquid supply pump group further includes a manual stop valve, and the manual stop valve is arranged between the output end of the emulsion tank and the centrifugal booster pump.

[0006] Preferably, the liquid supply pump group further includes a first pressure gauge and a first pressure sensor; the first pressure gauge and the first pressure sensor are connected between the first output end of the self-cleaning filter and the high-voltage motor pump group.

[0007] Preferably, the liquid supply pump group also includes a safety overflow pipeline, a safety overflow valve, a second pressure gauge and a second pressure sensor; the second pressure gauge and the second pressure sensor are connected between the output end of the high-voltage motor pump group and the descaling injection device; the safety overflow pipeline is connected between the output end of the high-voltage motor pump group and the emulsion tank, and the safety overflow valve is installed on the safety overflow pipeline.

[0008] Preferably, the liquid supply pump group further includes an electromagnetic unloading pipeline and an electromagnetic unloading valve, the electromagnetic unloading pipeline is connected between the output end of the high-voltage motor pump group and the emulsion tank, and the electromagnetic unloading valve is installed on the electromagnetic unloading pipeline.

[0009] Preferably, the liquid supply pump group further includes a high-pressure shut-off valve and a high-pressure one-way valve; the high-pressure shut-off valve and the high-pressure one-way valve are connected between the output end of the high-pressure motor pump group and the descaling injection device.

[0010] Preferably, the liquid supply pump group also includes a flexible joint and a high-pressure hose; the flexible joint is installed on the pipeline between the first output end of the self-cleaning filter and the high-pressure motor pump group; the high-pressure hose is connected between the high-pressure shut-off valve and the high-pressure one-way valve.

[0011] Preferably, the liquid supply pump group further includes a bladder accumulator, which is connected between the first output end of the self-cleaning filter and the high-voltage motor pump group.

[0012] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0013] The centrifugal booster pump sucks the emulsion from the emulsion tank and boosts the pressure to the inlet pressure required by the high-pressure pump unit.

[0014] High-pressure motor pump unit. The main pump utilizes a multi-cylinder reciprocating plunger pump. The high-pressure pump head is constructed of stainless steel (2Cr13) forgings, and the plunger is ceramic (with a ceramic surface) to ensure high precision and wear resistance. The motor utilizes an AC variable-frequency motor, offering low noise and energy savings. During descaling, the frequency converter adjusts the output flow rate to maintain the pump unit's output of high-pressure emulsion at the set pressure and flow rate for descaling. During descaling intermission (standby), the descaling solenoid unloading valve is energized to unload the pump unit, simultaneously reducing the frequency converter frequency to maintain low outlet pressure.

[0015] A self-cleaning filter is connected to the inlet of the high-voltage motor pump unit pipeline to prevent impurities and metal particles in the emulsion from entering the pump unit and causing wear and damage to the high-voltage motor pump unit's plunger, seals, etc. When the emulsion enters the self-cleaning filter body, it automatically identifies the degree of filter element blockage through its own intelligent detection and sends a signal to the drain valve to automatically drain the sewage. When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin. During this period, the emulsion is supplied normally and continuously to ensure the normal operation of the entire high-voltage motor pump unit.

[0016] A manual shut-off valve with a detection limit switch is set at the inlet of the pump group. If it is not opened, the centrifugal booster pump is not allowed to start to prevent the centrifugal pump from sucking air.

[0017] A set of first pressure sensor and first pressure gauge is installed on the inlet pipeline of the high-pressure motor pump group (i.e. the outlet of the centrifugal booster pump). When the outlet pressure of the centrifugal booster pump is detected to be too low (lower than 2 bar), the high-pressure pump group motor is prohibited from starting and an automatic alarm is given at the same time that the inlet pressure is too low.

[0018] The high-voltage motor pump unit is equipped with a built-in lubrication and cooling system, a safety relief valve, a second pressure gauge, and a second pressure sensor. These second pressure gauges and sensors monitor the high-pressure side pressure in real time and automatically alarm if it falls below the set pressure. A safety relief valve is installed at the pump unit outlet to prevent excessive pressure and provide a safety relief.

[0019] A set of electromagnetic unloading valves is installed at the outlet of the high-pressure motor pump unit. In standby mode (when the descaling spray device does not need to spray high-pressure emulsion), the electromagnet is energized, the unloading valve is fully opened, the pipeline is unloaded, and the high-pressure pump unit motor runs idle.

[0020] A high-pressure one-way valve and a high-pressure stop valve are installed at the outlet of the high-pressure motor pump group to achieve online maintenance and replacement.

[0021] A flexible joint is provided at the inlet of the high-pressure motor pump group and a high-pressure hose is provided at the outlet to cushion the vibration and impact on the pipeline caused by the operation of the pump group.

[0022] A bladder accumulator is set at the inlet of the high-pressure motor pump group to absorb pressure pulsation, which plays a pressure stabilizing role and reduces the unstable outlet pressure of the centrifugal booster pump, which causes impact on the high-pressure pump group. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an emulsion high-pressure descaling liquid supply pump group with a self-cleaning filter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Below according to the attached drawings Figure 1 , gives the preferred embodiment of the present invention, and describes it in detail so that the functions and features of the present invention can be better understood.

[0025] See also Figure 1 , an emulsion high-pressure descaling liquid supply pump group with a self-cleaning filter according to an embodiment of the present invention includes an emulsion tank 1, a liquid supply pump group 2 and a descaling injection device 3; the output end of the emulsion tank 1 is connected to the descaling injection device 3 through the liquid supply pump group 2; the output end of the descaling injection device 3 is connected to the emulsion tank 1; the liquid supply pump group 2 includes a centrifugal booster pump 201, a self-cleaning filter 202 and a high-voltage motor pump group 203; the centrifugal booster pump 201 is connected to the output end of the emulsion tank 1; the input end of the self-cleaning filter 202 is connected to the centrifugal booster pump 201, the first output end of the self-cleaning filter 202 is connected to the high-voltage motor pump group 203, and the second output end of the self-cleaning filter 202 is connected to the emulsion tank 1; the output end of the high-voltage motor pump group 203 is connected to the descaling injection device 3.

[0026] In this embodiment, the liquid supply pump assembly 2 further includes a manual stop valve 204 , which is disposed between the output end of the emulsion tank 1 and the centrifugal booster pump 201 .

[0027] The liquid supply pump assembly 2 further includes a first pressure gauge 205 and a first pressure sensor 206 ; the first pressure gauge 205 and the first pressure sensor 206 are connected between the first output end of the self-cleaning filter 202 and the high-voltage motor pump assembly 203 .

[0028] The liquid supply pump group 2 also includes a safety overflow pipeline, a safety overflow valve 207, a second pressure gauge 208 and a second pressure sensor 209; the second pressure gauge 208 and the second pressure sensor 209 are connected between the output end of the high-voltage motor pump group 203 and the descaling injection device 3; the safety overflow pipeline is connected between the output end of the high-voltage motor pump group 203 and the emulsion tank 1, and the safety overflow valve 207 is installed on the safety overflow pipeline.

[0029] The liquid supply pump group 2 also includes an electromagnetic unloading pipeline and an electromagnetic unloading valve 210. The electromagnetic unloading pipeline is connected between the output end of the high-voltage motor pump group 203 and the emulsion tank 1. The electromagnetic unloading valve 210 is installed on the electromagnetic unloading pipeline.

[0030] The liquid supply pump group 2 also includes a high-pressure shut-off valve 211 and a high-pressure one-way valve 212 ; the high-pressure shut-off valve 211 and the high-pressure one-way valve 212 are connected between the output end of the high-pressure motor pump group 203 and the descaling spray device 3 .

[0031] The liquid supply pump group 2 also includes a flexible joint 213 and a high-pressure hose 214; the flexible joint 213 is installed on the pipeline between the first output end of the self-cleaning filter 202 and the high-pressure motor pump group 203; the high-pressure hose 214 is connected between the high-pressure shut-off valve 211 and the high-pressure one-way valve 212.

[0032] The liquid supply pump assembly 2 further includes a bladder accumulator 215 , which is connected between the first output end of the self-cleaning filter 202 and the high-voltage motor pump assembly 203 .

[0033] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter, characterized in that: It comprises an emulsion tank, a liquid supply pump group and a descaling spray device; the output end of the emulsion tank is connected to the descaling spray device through the liquid supply pump group; the output end of the descaling spray device flows back to the emulsion tank; the liquid supply pump group comprises a centrifugal booster pump, a self-cleaning filter and a high-voltage motor pump group, and the high-voltage motor pump group is equipped with an AC variable frequency motor; the centrifugal booster pump is connected to the output end of the emulsion tank; the input end of the self-cleaning filter is connected to the centrifugal booster pump, the first output end of the self-cleaning filter is connected to the high-voltage motor pump group, and the second output end of the self-cleaning filter is connected to the emulsion tank; the output end of the high-voltage motor pump group is connected to the descaling spray device; The liquid supply pump group includes a first pressure sensor, which is connected between the first output end of the self-cleaning filter and the high-voltage motor pump group; The liquid supply pump group further includes a safety overflow pipeline, a safety overflow valve and a second pressure sensor, wherein the second pressure sensor is connected between the output end of the high-voltage motor pump group and the descaling spray device; the safety overflow pipeline is connected between the output end of the high-voltage motor pump group and the emulsion tank, and the safety overflow valve is installed on the safety overflow pipeline; The liquid supply pump group further includes an electromagnetic unloading pipeline and an electromagnetic unloading valve, wherein the electromagnetic unloading pipeline is connected between the output end of the high-voltage motor pump group and the emulsion tank, and the electromagnetic unloading valve is installed on the electromagnetic unloading pipeline; During descaling, the output flow is adjusted by the frequency converter of the AC variable frequency motor of the high-voltage motor pump group so that the high-voltage motor pump group outputs high-pressure emulsion at the set pressure and flow for descaling. When descaling is interrupted, the electromagnetic unloading valve is energized to unload, and the frequency converter of the AC variable frequency motor of the high-voltage motor pump group is reduced at the same time, so that the outlet pressure of the high-voltage motor pump group is maintained at low pressure. The liquid supply pump group includes a bladder accumulator, which is connected between the first output end of the self-cleaning filter and the high-voltage motor pump group.

2. The emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter according to claim 1 is characterized in that: The liquid supply pump group further includes a manual stop valve, which is arranged between the output end of the emulsion tank and the centrifugal booster pump.

3. The emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter according to claim 2, characterized in that: The liquid supply pump group further includes a first pressure gauge; the first pressure gauge is connected between the first output end of the self-cleaning filter and the high-voltage motor pump group.

4. The emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter according to claim 3, characterized in that: The liquid supply pump group also includes a second pressure gauge; the second pressure gauge is connected between the output end of the high-voltage motor pump group and the descaling injection device.

5. The emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter according to claim 1, characterized in that: The liquid supply pump group also includes a high-pressure shut-off valve and a high-pressure one-way valve; the high-pressure shut-off valve and the high-pressure one-way valve are connected between the output end of the high-pressure motor pump group and the descaling injection device.

6. The emulsion high-pressure descaling liquid supply pump set with a self-cleaning filter according to claim 5, characterized in that: The liquid supply pump group also includes a flexible joint and a high-pressure hose; the flexible joint is installed on the pipeline between the first output end of the self-cleaning filter and the high-pressure motor pump group; the high-pressure hose is connected between the high-pressure shut-off valve and the high-pressure one-way valve.

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