Automatic overpressure breaker for emulsifying pump

Abstract

The utility model discloses an emulsion pump overpressure automatic breaker, including start button SB1, stop button SB2, contactor, first relay to third relay, the series connection of start button SB1, stop button SB2, the coil of first relay to third relay's normally open contact and the coil of contactor forms series connection branch, and the first end and the tail end of series connection branch are connected with AC power supply inlet and outlet point respectively, and the normally open contact of contactor is parallel with start button SB1 and is as the power supply start and self -preservation loop of emulsion pump, and the coil of first relay to third relay is connected with overvoltage protection node, liquid level node and oil temperature node respectively and forms three branch lines, and three branch lines are parallel between stop button SB2 and AC control power supply inlet and outlet point, the utility model has the advantages of: can consider oil temperature, pressure and liquid level comprehensively, and guarantees emulsion pump operation safety comprehensively.

Description

Technical Field

[0001] This utility model relates to the field of emulsifying pumps, specifically to an automatic overpressure cut-off device for emulsifying pumps. Background Technology

[0002] An emulsifying pump is an industrial device that generates powerful shearing force through a precise combination of rotor and stator at high speed to achieve mixing, pulverizing, and emulsification. Its working principle involves high-frequency hydraulic shearing and centrifugal extrusion, resulting in the uniform distribution and emulsification of materials.

[0003] Emulsifying pumps are equipped with pressure gauges on the valve body to display real-time operating pressure. When the pressure gauge malfunctions or the unloading valve, safety valve, or other valve components fail, even with dedicated monitoring, it's impossible to immediately determine the pump's output pressure, posing a safety hazard of overpressure injury. Furthermore, the oil temperature in the pump's tank can become excessively high during operation, potentially damaging the pump body. Additionally, excessively high liquid levels can cause overflow, while excessively low levels fail to meet startup requirements; therefore, liquid level is also a crucial startup condition. In conclusion, ensuring safe operation of emulsifying pumps while considering pressure, tank temperature, and liquid level is currently a hot research topic. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to ensure the safe operation of the emulsification pump while taking into account the pressure of the emulsification pump, the temperature of the oil tank and the liquid level at the outlet.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: an automatic overpressure circuit breaker for an emulsifying pump, comprising a start button SB1, a stop button SB2, a contactor, and a first to a third relay. The normally open contacts of the start button SB1, the stop button SB2, the first to the third relay, and the coil of the contactor are connected in series to form a series branch. The first and last ends of the series branch are respectively connected to the AC control power input and output points. The normally open contact of the contactor is connected in parallel with the start button SB1 and serves as the power start and self-protection circuit for the emulsifying pump. The coils of the first to the third relays are connected in series with the overpressure protection node, the liquid level node, and the oil temperature node to form three branches. All three branches are connected in parallel between the stop button SB2 and the AC control power input and output points.

[0006] Furthermore, the coils of the first to third relays are connected in series with the overpressure protection node, the liquid level node, and the oil temperature node to form three branches, including:

[0007] The overpressure protection node is connected in series with the coil KA1 of the first relay to form the first branch; the liquid level node is connected in series with the coil KA2 of the second relay to form the second branch; and the oil temperature node is connected in series with the coil KA3 of the third relay to form the third branch.

[0008] Furthermore, the emulsifying pump overpressure automatic circuit breaker also includes a GPD60k type mining explosion-proof pressure transmitter and a pressure sensor. The pressure sensor is installed at the outlet of the emulsifying pump. An analog-to-digital conversion port of the GPD60k type mining explosion-proof pressure transmitter receives data from the pressure sensor. The overpressure protection node is a switching output port of the GPD60k type mining explosion-proof pressure transmitter.

[0009] Furthermore, the liquid level node is a UQK-61 series float switch.

[0010] Furthermore, the emulsifying pump overpressure automatic disconnector also includes a temperature sensor, which is installed in the emulsifying pump's oil tank. Another analog-to-digital conversion port of the GPD60k mining explosion-proof pressure transmitter receives data from the temperature sensor, and the oil temperature node is another switching output port of the GPD60k mining explosion-proof pressure transmitter.

[0011] Furthermore, the start button SB1 is a normally open switch, and the stop button SB2 is a normally closed switch.

[0012] Furthermore, the emulsifying pump overpressure automatic circuit breaker also includes a first indicator light, which is connected in series with the coil of the first relay and the branch where the overpressure protection node is located.

[0013] Furthermore, the emulsifying pump overpressure automatic circuit breaker also includes a second indicator light, which is connected in series with the coil of the second relay and the branch where the liquid level node is located.

[0014] Furthermore, the emulsifying pump overpressure automatic circuit breaker also includes a third indicator light, which is connected in series with the coil of the third relay and the branch where the oil temperature node is located.

[0015] Furthermore, the normally open contact of the contactor is the self-holding contact of the QBZ-200 magnetic starter.

[0016] The advantages of this invention are as follows: Before the emulsifying pump starts, the three branches containing the coils of the first to third relays perform self-checks on pressure, liquid level, and oil temperature respectively. When the pressure, liquid level, and oil temperature meet the requirements, the corresponding nodes close, the coils of the first to third relays on the corresponding branches are energized, and the corresponding normally open contacts close. At this time, pressing the start button SB1 energizes the contactor coil and closes the normally open contacts of the contactor, thus energizing and starting the emulsifying pump. Otherwise, the emulsifying pump cannot start. Thus, the overall circuit can comprehensively consider oil temperature, pressure, and liquid level, fully ensuring the safe operation of the emulsifying pump. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of an automatic overpressure disconnect device for an emulsifying pump disclosed in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the installation of an automatic overpressure disconnector for an emulsifying pump disclosed in an embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram of the design principle of an automatic overpressure cut-off switch for an emulsifying pump disclosed in an embodiment of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1 and Figure 2As shown, this utility model provides an automatic overvoltage circuit breaker for an emulsifying pump, including a start button SB1, a stop button SB2, a contactor, and a first to a third relay. The normally open contacts KA12, KA22, and KA32 of the start button SB1, stop button SB2, and the first to third relays, along with the coil KM1 of the contactor, are connected in series to form a series branch. The beginning and end of the series branch are connected to the input and output points of the AC control power supply, respectively. The normally open contact KM11 of the contactor is connected in parallel with the start button SB1 and serves as the power start and self-holding circuit for the emulsifying pump. The coils KA1, KA2, and KA3 of the first to third relays are connected to the overvoltage protection circuit. Node K1, level node K2, and oil temperature node K3 are connected in series to form three branches. Specifically, overpressure protection node K1 is connected in series with coil KA1 to form the first branch, level node K2 is connected in series with coil KA2 to form the second branch, and oil temperature node K3 is connected in series with coil KA3 to form the third branch. All three branches are connected in parallel between the stop button SB2 and the AC control power input / output point. In this embodiment, all three branches are connected in parallel with the branch formed by SB1, KA12, KA22, KA32, and KM1. In practical applications, the three branches can also be directly connected in parallel with SB2, or the three branches can be powered by a separate power supply and not connected to this circuit. The start button SB1 is a normally open switch, and the stop button SB2 is a normally closed switch.

[0022] Combination Figure 2 As a further improvement, the automatic overpressure cutoff switch for the emulsifying pump also includes a GPD60k type explosion-proof pressure transmitter for mining and a pressure sensor (the model of the pressure sensor is not specifically limited). The pressure sensor is installed at the outlet of the emulsifying pump. One analog-to-digital converter port of the GPD60k type explosion-proof pressure transmitter receives data from the pressure sensor. The overpressure protection node K1 is a switching output port of the GPD60k type explosion-proof pressure transmitter. The pressure sensor detects the pressure at the outlet of the emulsifying pump, and this pressure value is transmitted to one analog-to-digital converter port of the GPD60k type explosion-proof pressure transmitter. The GPD60k type explosion-proof pressure transmitter determines whether the pressure exceeds the preset pressure range and converts the result into a switching quantity. The analog-to-digital conversion of the pressure signal and the conversion into a switching quantity according to the preset pressure range are built-in functions of the GPD60k type explosion-proof pressure transmitter and are not within the scope of protection of this application. In practical applications, it is only necessary to connect the pressure sensor to the analog-to-digital converter port of the GPD60k type explosion-proof pressure transmitter. Figure 2 In this embodiment, M represents the motor of the emulsifying pump. The overpressure automatic circuit breaker is connected to an air switch, and one end of the pressure sensor is connected to the emulsifying pump outlet. A tee is installed at the emulsifying pump outlet, and the tee is connected to the working high-pressure hose and the overpressure automatic circuit breaker. Thus, the pressure displayed by the overpressure automatic circuit breaker is the real-time pressure of the working water circuit.

[0023] Continue reading Figure 2 As a further technical improvement, the liquid level node K2 is a UQK-61 series float switch, such as model UQK-61-1, model UQK-61-2, model UQK-61-3, and model UQK-61-4. The float switch automatically starts and stops according to the liquid level. In practical applications, the switch only needs to be installed in a preset position in the emulsifying pump's water tank to prevent the pump body from burning out due to water shortage. This is the working characteristic of the float switch, which will not be elaborated here.

[0024] Continue reading Figure 2 As a further technical improvement, the automatic overpressure cut-off switch for the emulsifying pump also includes a temperature sensor (the model of the temperature sensor is not specifically limited). The temperature sensor is installed in the oil tank of the emulsifying pump. Another analog-to-digital conversion port of the GPD60k mining explosion-proof pressure transmitter receives data from the temperature sensor. The oil temperature node K3 is another switching output port of the GPD60k mining explosion-proof pressure transmitter. The temperature sensor detects the temperature of the oil tank of the emulsifying pump, and this temperature value is transmitted to another analog-to-digital conversion port of the GPD60k mining explosion-proof pressure transmitter. The GPD60k mining explosion-proof pressure transmitter determines whether the preset temperature range is exceeded and converts the result into a switching quantity. The analog-to-digital conversion of the temperature value and the conversion into a switching quantity according to the preset temperature range are built-in functions of the GPD60k mining explosion-proof pressure transmitter and are not within the scope of protection of this application. In practical applications, it is only necessary to connect the temperature sensor to the analog-to-digital conversion port of the GPD60k mining explosion-proof pressure transmitter.

[0025] See Figure 3 The emulsifying pump overpressure automatic circuit breaker also includes a first indicator light L1, which is connected in series in the circuit containing the overpressure protection node K1 and the coil KA1, and is used to indicate whether the circuit is open or closed. The emulsifying pump overpressure automatic circuit breaker also includes a second indicator light L2, which is connected in series in the circuit containing the liquid level node K2 and the coil KA2, and is used to indicate whether the circuit is open or closed. The emulsifying pump overpressure automatic circuit breaker also includes a third indicator light L3, which is connected in series in the circuit containing the oil temperature node K3 and the coil KA3, and is used to indicate whether the circuit is open or closed.

[0026] The emulsifying pump start switch is a two-way remote control button. During normal use, the emulsifying pump is powered by pressing the start button SB1. Taking the Weishun BRW200 / 31.5 emulsifying pump as an example, the rated working pressure of this pump is 31.5MPa. The working pressure is controlled by adjusting the pressure of the automatic unloading valve, for example, setting it to 28MPa. Then, the pressure of the overpressure automatic disconnector is adjusted to be slightly higher than the pressure of the automatic unloading valve, for example, 30MPa. When the outlet pressure of the emulsifying pump is higher than 28MPa, the automatic unloading valve will release pressure to maintain the output pressure at 28MPa. When the automatic unloading valve fails, the system pressure gradually increases. When the outlet pressure reaches 30MPa, the overpressure automatic disconnector works, the overpressure protection node K1 is disconnected, the coil KA1 is de-energized, the normally open contact KA12 is disconnected, and the control air switch trips, that is, the power circuit is de-energized. The coil KM1 is de-energized, the contact KM11 is disconnected, thereby shutting down the emulsifying pump. To restart the emulsifying pump, first turn on the air switch to supply power, then press the remote start button SB1 to power the emulsifying pump.

[0027] For example, when the liquid level is higher than the initial level set by the float switch, the float switch closes, energizing coil KA2 on its branch and closing the corresponding normally open contact KA22. Similarly, when the oil temperature is within the set temperature range, the oil temperature node K3 closes, energizing coil KA3 on its branch and closing the corresponding normally open contact KA32. When the pressure is within the set pressure range, the overpressure protection point K1 closes, energizing coil KA1 on its branch and closing the corresponding normally open contact KA12. When all three nodes are closed, pressing the start button SB1 energizes contactor coil KM1 and closes normally open contact KM11, thus energizing and starting the emulsifying pump. Conversely, the emulsifying pump cannot start. Thus, the entire circuit can comprehensively consider oil temperature, pressure, and liquid level to fully ensure the safe operation of the emulsifying pump.

[0028] Through the above technical solutions, this utility model designs an automatic overpressure cutoff device that can remotely cut off power when the pressure exceeds a set value, solving the problem of not being able to immediately stop the equipment when the emulsifying pump pressure is abnormal. It eliminates the need for one person to monitor and operate, thus solving the problem of personnel occupation. By connecting start and stop buttons, it solves the problem of the emulsifying pump not being able to be remotely cut off. Through pressure contact settings, it solves the problem of inaccurate pressure readings from pressure gauges. The overall equipment is lightweight, small in size, easy to use, and has a simple working principle. The automatic overpressure cutoff is fast, safe, and requires no on-site monitoring, eliminating potential safety hazards caused by valve failure in the emulsifying pump. Furthermore, it is more accurate than a pressure gauge, which can only be installed on the emulsifying pump body. This automatic overpressure cutoff device has no environmental restrictions, can be installed in the working area, and can be monitored in real time. Its automatic power-off in case of abnormality is faster and safer than manually closing the gate valve.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic overpressure cut-off switch for an emulsifying pump, characterized in that, The system includes a start button SB1, a stop button SB2, a contactor, and first to third relays. The normally open contacts of the start button SB1, stop button SB2, and first to third relays, along with the coils of the contactor, are connected in series to form a series branch. The beginning and end of the series branch are connected to the AC control power input and output points, respectively. The normally open contacts of the contactor are connected in parallel with the start button SB1 and serve as the power start and self-holding circuit for the emulsifying pump. The coils of the first to third relays are connected in series with the overpressure protection node, the liquid level node, and the oil temperature node, respectively, to form three branches. All three branches are connected in parallel between the stop button SB2 and the AC control power input and output points.

2. The automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, The coils of the first to third relays are connected in series with the overpressure protection node, the liquid level node, and the oil temperature node to form three branches, including: The overpressure protection node is connected in series with the coil KA1 of the first relay to form the first branch; the liquid level node is connected in series with the coil KA2 of the second relay to form the second branch; and the oil temperature node is connected in series with the coil KA3 of the third relay to form the third branch.

3. The automatic overpressure disconnect device for an emulsifying pump according to claim 2, characterized in that, It also includes a GPD60k type explosion-proof pressure transmitter for mining and a pressure sensor. The pressure sensor is installed at the outlet of the emulsifying pump. An analog-to-digital conversion port of the GPD60k type explosion-proof pressure transmitter for mining receives data from the pressure sensor. The overpressure protection node is a switch output port of the GPD60k type explosion-proof pressure transmitter for mining.

4. The automatic overpressure disconnect device for an emulsifying pump according to claim 3, characterized in that, The liquid level node is a UQK-61 series float switch.

5. An automatic overpressure disconnect device for an emulsifying pump according to claim 4, characterized in that, It also includes a temperature sensor, which is installed in the oil tank of the emulsifying pump. Another analog-to-digital conversion port of the GPD60k mining explosion-proof pressure transmitter receives data from the temperature sensor. The oil temperature node is another switch output port of the GPD60k mining explosion-proof pressure transmitter.

6. The automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, The start button SB1 is a normally open switch, and the stop button SB2 is a normally closed switch.

7. The automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, It also includes a first indicator light, which is connected in series with the coil of the first relay and the branch where the overvoltage protection node is located.

8. An automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, It also includes a second indicator light, which is connected in series with the coil of the second relay and the branch where the liquid level node is located.

9. An automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, It also includes a third indicator light, which is connected in series with the coil of the third relay and the branch where the oil temperature node is located.

10. An automatic overpressure disconnect device for an emulsifying pump according to claim 1, characterized in that, The normally open contact of the contactor is a QBZ-200 type magnetic starter.

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