CN102225711B - Liquid reservoir for mechanically sealed flushing system - Google Patents

Abstract

The invention discloses a liquid reservoir for a mechanically sealed flushing system; and a cooling water pipe, a magnetic liquidometer, a liquid level transmitter and a pressure switch are arranged in the liquid reservoir, the liquid reservoir is provided with a buffer solution outlet and a buffer solution inlet, and a solution-charging pump is arranged on the liquid reservoir. Since the cooling water pipe is arranged in the liquid reservoir, a system buffer solution is cooled to maintain temperature of the buffer solution within a certain temperature range; the liquidometer transmitter transmits a liquid level change electric signal to a control room for real-time monitoring; the pressure switch has the effect of remotely monitoring the pressure in the liquid reservoir, when the system pressure is changed, the pressure switch is used for transmitting a pressure signal to the control room so as to brake a mechanical pump; and when the systems needs the supplementary of the sealing buffer solution, the solution-charging pump can immediately supplement the solution while the mechanical pump is in work. The device has the function of locally indicating the liquid level and remotely monitoring and indicating the liquid level, and is convenient and reliable to use.

Description

Mechanical seal rinsing system liquid vessel

Technical field

The present invention relates to a kind of mechanically-sealing apparatus, relate to specifically a kind of mechanical seal rinsing system liquid vessel.

Background technology

In oil, chemical industry, pump is delivering liquid material equipment commonly used, and the parts that stop pumped (conveying) medium to leak outside use mechanical seal basically.Adopt generally speaking single mechanical end face seal, namely can satisfy operating needs once the cover sealing.When pumped (conveying) medium is in inflammable and explosive, the poisonous and hazardous situation, such as petroleum products, chemical products, medium produces the leakage meeting people and environment is caused very big harm, even explosion caused and fire.Updating and improve along with packing technique, double seals and series seal have appearred, i.e. two cover sealings are installed on the pump simultaneously, and inner seal contacts with sealing medium, and outer side seal is contact medium not, between inner seal and outer side seal, buffering liquid must be arranged, avoid outer side seal dry friction and cause the sealing premature failure, good service conditions is provided for simultaneously the sealing of two roads, buffering liquid flows, and is lubricated and take away the heat that seal operation produces to seal face.Liquid vessel just provides the device of buffering liquid and circular buffering liquid.Now general receiver as shown in Figure 1, function ratio is more single, has some problems: at receiver the liquid level glass vision panel is housed, liquid level shows not obvious, when light is weak, can't see liquid level clearly, more can not realize remote monitor and control; Do not have pressure change signal to become and send, when mechanical seal is leaked, can't in time find; Do not have temperature to show, can not come discovery work whether normal according to temperature traverse; Can not in the pump working process, in time replenish buffer fluid; Buffer fluid in the receiver can not fully cool off, and makes easily mechanical seal owing to overheatedly cause inefficacy.

Summary of the invention

For the defective that the device of existing circular buffering liquid exists, the invention provides a kind of a kind of mechanical seal rinsing system liquid vessel of indicating on the spot liquid level and remote monitor and control indication liquid level.

Solving the problems of the technologies described above the concrete technical measures of taking is: a kind of mechanical seal rinsing system liquid vessel, it is characterized in that: cooling water pipe 2 is housed in receiver 1, be shaped with cooling water inlet 3 and cooling water outlet 4 at cooling water pipe 2, on receiver 1 top magnetic fluid level gauge 5 is housed, on receiver 1 top fluid level transmitter 6 is housed, in receiver 1 side pressure switch 7 is housed, pressure switch 7 converts the pressure variation to electric signal and is sent to long distance control system, in pressure switch 7 one sides compression indicator 8 is housed, be shaped with buffer fluid entrance 10 in side, receiver 1 middle part, at buffer fluid entrance 10 heat indicator 9 is housed, below buffer fluid entrance 10, be shaped with buffer fluid outlet 11, in receiver 1 side fluid filling pump 12 is housed, is shaped with system exhaust 13 at fluid filling pump 12 liquid-feeding tubes, be shaped with liquid vessel leakage fluid dram 14 in receiver 1 bottom.

Beneficial effect of the present invention: the utility model is equipped with cooling water pipe in the receiver body, the cooling system buffer fluid makes buffer fluid remain within the certain temperature range fluid level transmitter, convert the liquid level variation to electric signal transmission to control cabin, Real Time Monitoring receiver liquid level.Break down at work when mechanical seal and to leak, liquid level all can change, and reflect by magnetic fluid level gauge and fluid level transmitter, and can accurately to judge is where to overlap the mechanical seal et out of order, in time keeps in repair; Being installed in receiver side pressure switch, playing remote monitor and control receiver internal pressure, is a kind of thyristor regulator device.When pressure medium produces concentrated force by the pressure-sensitive parts, cause when relatively producing torque difference with spring pressure that micro-switch produces the switching of Push And Release, control circuit two formula on off states thus, thereby reach pressure controlled purpose, break down at work when mechanical seal and to leak, system pressure all can change, and this can show by compression indicator PI, also can convert pressure signal to electric signal by pressure switch and be sent to control cabin, the braking pump.And can accurately to judge be where to overlap the mechanical seal et out of order, in time keeps in repair.When mechanical seal and sealflush the system works mal or because pump et out of order when causing mechanical seal work mal; the whole system works temperature of sealflushing is raise; if under off rating, work for a long time; can cause pump or mechanical seal and sealflush system badly damaged; heat indicator in time detects sealing system buffer fluid temperature; when temperature surpasses control criterion, should damage the maintenance of element.When system need to replenish the sealing buffer fluid, fluid filling pump can replenish when pump is worked in time.

Description of drawings

Fig. 1 is existing general receiver structural representation;

Fig. 2 structural representation of the present invention;

Fig. 3 is the lateral plan of Fig. 2;

Fig. 4 is work scheme drawing of the present invention;

Fig. 5 is the lateral plan of Fig. 4.

Among the figure: 1 is the receiver body, and 2 is cooling water pipe, and 3 is the cooling water inlet, and 4 is cooling water outlet, 5 is magnetic fluid level gauge, and 6 is fluid level transmitter, and 7 is pressure switch, and 8 is compression indicator, 9 is heat indicator, and 10 is the buffer fluid entrance, and 11 are the buffer fluid outlet, 12 is fluid filling pump, and 13 is system exhaust, and 14 is the liquid vessel leakage fluid dram, 15 are the media end sealing, and 16 are the buffer fluid sealing, and 17 is the media end gland cover, 18 is the buffer fluid gland cover, and 19 are the outlet of gland buffer fluid, and 20 is gland buffer fluid entrance.

The specific embodiment

Be described with reference to the accompanying drawings structure of the present invention.

A kind of mechanical seal rinsing system liquid vessel, shown in Figure 3 such as Fig. 2, cooling water pipe 2 is housed in receiver body 1, be shaped with cooling water inlet 3 and cooling water outlet 4 at cooling water pipe 2, the effect of cooling water expansion tank is the temperature that reduces the flushing system buffer fluid.On receiver body 1 top magnetic fluid level gauge 5 is housed, plays to show on the spot height of liquid level, magnetic fluid level gauge 5 is comprised of two parts: urceolus base portion and the attached magnetic turned column part that leans against the outer two sides of main body different colours.Adopt law of connected vessels to make contour introducing urceolus main body in liquid and the tank body, the permanent magnet type float that floats in the main body, main body and receiver form a sealing system.Along with liquid level changes, the magnetic float height is respective change also, by the magnetic action principle, the attached outer magnetic turned column of main body that leans against is rotated, and two sides color difference just shows liquid level, thereby reaches the purpose of level detection.On receiver body 1 top fluid level transmitter 6 is housed, the liquid compatible with pumped medium (being buffer fluid) is housed in the receiver, provide buffer fluid for sealflushing system, show liquid level by magnetic fluid level gauge 5, simultaneously, be installed in the fluid level transmitter 6 at receiver 1 top, fluid level transmitter 6 is according to law of buoyancy, and adopts three line bleeder principles that liquid level is measured and signal transmitting.Liquid level is established the highest liquid level and minimum liquid level.Liquid level changes the proportional variation of voltage cause fluid level transmitter output, with electric signal transmission to control cabin, Real Time Monitoring receiver liquid level.In the pump working process, in mechanical seal when normal operation,, the receiver liquid level does not change substantially, still, leaks when the medium-tight of mechanical seal breaks down, and medium can leak in the receiver, and the receiver liquid level can raise; Break down when the sealing of the buffer fluid of mechanical seal and to leak, buffer fluid can leak into the outside of pump, and the receiver liquid level can reduce.Can accurately judge from the liquid level variation is where to overlap the mechanical seal et out of order, is convenient in time keep in repair.In receiver 1 side pressure switch 7 is housed, pressure switch 7 converts the pressure variation to electric signal and is sent to long distance control system, in pressure switch 7 one sides compression indicator 8 is housed, and pressure switch 7 is a kind of thyristor regulator devices.When pressure medium produces concentrated force by the pressure-sensitive parts, cause when relatively producing torque difference with spring pressure that micro-switch produces the switching of Push And Release, control circuit two formula on off states thus, thus reach pressure controlled purpose.During the pump normal operation, mechanical seal does not have fault, and too large variation can not occur the pressure of whole flushing system.But the medium-tight of working as mechanical seal breaks down and leaks, and medium can leak in the receiver, and the pressure of receiver can constantly increase; Break down when the sealing of the buffer fluid of mechanical seal and to leak, buffer fluid can leak into the outside of pump, and the receiver buffer fluid can reduce, and the pressure of receiver is reduction constantly.From above two kinds of phenomenons, as long as mechanical seal is broken down at work and is leaked, system pressure all can change, and increases or reduces, and this can show by compression indicator 8, pressure switch 7 converts the pressure variation to electric signal and is sent to long distance control system, convert pressure signal to electric signal and be sent to control cabin, the braking pump plays remote monitor and control receiver internal pressure, and can accurately to judge be where to overlap the mechanical seal et out of order, in time keeps in repair.Be shaped with buffer fluid entrance 10 in side, receiver 1 middle part, at buffer fluid entrance 10 heat indicator 9 is housed, in the pump working process, when pump and mechanical seal and the system that sealflushes work, the temperature of whole flushing system remains on uniform temperature substantially, can not occur to change too largely.Only have when mechanical seal and sealflush the system works mal or because pump et out of order when causing mechanical seal work mal; the whole system works temperature of sealflushing is raise; if under off rating, work for a long time; can cause pump or mechanical seal and sealflush system badly damaged, consequence is very serious.Heat indicator 9 can detect sealing system buffer fluid temperature, in time damages the maintenance of element.In receiver 1 side fluid filling pump 12 is housed, is shaped with system exhaust 13 at fluid filling pump 12 liquid-feeding tubes.Fluid filling pump P is a kind of instrument to receiver and flushing system topping up, before pump work or owing to mechanical seal work the time, break down and leak, all need to replenish buffer fluid to receiver and the system that sealflushes, make the whole system's normal operation of sealflushing.Be shaped with liquid vessel leakage fluid dram 14 in receiver body 1 bottom, regularly discharge buffer fluid and impurity wherein in the receiver.

[0010]Working state structure such as Fig. 4, shown in Figure 5, buffer fluid entrance 10 on the receiver is connected by the outlet of the gland buffer fluid on pipeline and the medium-tight gland 17 19, buffer fluid outlet 11 is connected by pipeline and the gland buffer fluid entrance 20 that cushions on the liquid sealing gland 18, and the liquid compatible with pumped medium (being buffer fluid) that is equipped with in the receiver 1 is offered the system of sealflushing.

Claims (1)

1. mechanical seal rinsing system liquid vessel, it is characterized in that: cooling water pipe (2) is housed in receiver (1), be shaped with cooling water inlet (3) and cooling water outlet (4) at cooling water pipe (2), on receiver (1) top magnetic fluid level gauge (5) is housed, on receiver (1) top fluid level transmitter (6) is housed, in receiver (1) side pressure switch (7) is housed, pressure switch (7) converts the pressure variation to electric signal and is sent to long distance control system, in pressure switch (7) one sides compression indicator (8) is housed, be shaped with buffer fluid entrance (10) in side, receiver (1) middle part, at buffer fluid entrance (10) heat indicator (9) is housed, be shaped with buffer fluid outlet (11) in buffer fluid entrance (10) below, in receiver (1) side fluid filling pump (12) is housed, be shaped with system exhaust (13) at fluid filling pump (12) liquid-feeding tube, be shaped with liquid vessel leakage fluid dram (14) in receiver (1) bottom.

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