CN202038620U - Liquid reservoir of mechanically-sealed flushing system - Google Patents

Abstract

The utility model discloses a liquid reservoir of a mechanically-sealed flushing system, wherein a cooling water pipe, a magnetic liquid indicator, a liquid level transmitter and a pressure switch are arranged in the liquid reservoir, a buffer solution outlet and a buffer solution inlet are arranged at the liquid reservoir, and a solution filling pump is assembled on the liquid reservoir. Because the cooling water pipe and the buffer solution of a cooling system are arranged in the liquid reservoir, so the buffer solution is kept within a certain range, and the liquid level transmitter transfers the liquid level variation signal to a control room to be real-timely monitored. The pressure switch plays the role of remotely monitoring the pressure of the liquid reservoir, when the system pressure changes, the pressure signal is transferred to the control room through the pressure switch to brake a pump. When the system is needed to be filled with the seal buffer solution, the liquid filling pump can timely fill when the pump works. The device has the functions of locally indicating the liquid level and remotely monitoring the indication liquid level, and is convenient and reliable to use.

Description

Mechanical seal rinsing system liquid vessel

Technical field

The utility model relates to a kind of mechanically-sealing apparatus, relates to a kind of mechanical seal rinsing system liquid vessel specifically.

Background technology

In oil, chemical industry, pump is a delivering liquid material equipment commonly used, and the parts that stop pumped (conveying) medium to leak outside use mechanical seal basically.Adopt single mechanical end face seal generally speaking, promptly can satisfy operating needs once the cover sealing.When pumped (conveying) medium is under inflammable and explosive, the poisonous and hazardous situation, 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, inner seal and outside between the side seal, buffering liquid must be arranged, avoid outer side seal dry friction and cause the sealing premature failure, the good operation condition 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 the general-duty receiver as shown in Figure 1, function ratio is more single, has some problems: the liquid level glass vision panel is housed on receiver, and liquid level shows not obvious, when light is more 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,, can't in time find when mechanical seal is leaked; 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 mechanical seal easily owing to overheatedly cause inefficacy.

Summary of the invention

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

Solving the problems of the technologies described above the concrete technical measures of being taked is: a kind of mechanical seal rinsing system liquid vessel, it is characterized in that: cooling water pipe 2 is housed in receiver 1, on cooling water pipe 2, be shaped on cooling water inlet 3 and cooling water outlet 4, 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 on buffer fluid outlet 10 in side, receiver 1 middle part, in buffer fluid outlet 10, heat indicator 9 is housed, below buffer fluid outlet 10, be shaped on buffer fluid inlet 11, in receiver 1 side fluid filling pump 12 is housed, on fluid filling pump 12 liquid-feeding tubes, is shaped on system exhaust 13, be shaped on liquid vessel leakage fluid dram 14 in receiver 1 bottom.

The beneficial effects of the utility model: 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 liquid level change to electric signal and transfer to control cabin, monitor the receiver liquid level in real time.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 two stepping controllers.When pressure medium produces concentrated force by the pressure-sensitive parts, cause when relatively producing torque difference that micro-switch produces the switching of Push And Release with spring pressure, 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 and be sent to control cabin, the braking pump by pressure switch.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; can make the whole system works temperature build-up of sealflushing; 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 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 utility model;

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

Fig. 4 is a work scheme drawing of the present utility model;

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 are the buffer fluid outlet, and 11 are the buffer fluid inlet, 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 are gland buffer fluid inlet.

The specific embodiment

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

A kind of mechanical seal rinsing system liquid vessel, shown in Figure 3 as Fig. 2, cooling water pipe 2 is housed in receiver body 1, on cooling water pipe 2, be shaped on cooling water inlet 3 and cooling water outlet 4, the effect of cooling water expansion tank is the temperature that is used for reducing the flushing system buffer fluid.On receiver body 1 top magnetic fluid level gauge 5 is housed, plays to show on the spot liquid level height, magnetic fluid level gauge 5 is made up of two parts: the urceolus base portion and attached lean against main body outward the magnetic of two sides different colours turn over the post part.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 change, the magnetic float height is respective change also, by the magnetic action principle, makes the attached outer magnetic of main body that leans against turn over the post rotation, 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, by magnetic fluid level gauge 5 liquid levels, 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-way bleeder principle that liquid level is measured and signal transmitting.Liquid level is established the highest liquid level and minimum liquid level.Liquid level change causes the proportional variation of voltage of fluid level transmitter output, and electric signal is transferred to control cabin, monitors the receiver liquid level in real time.In the pump working process, during the mechanical seal 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 liquid level change 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 two stepping controllers.When pressure medium produces concentrated force by the pressure-sensitive parts, cause when relatively producing torque difference that micro-switch produces the switching of Push And Release with spring pressure, 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 big variation can not take place 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 on buffer fluid outlet 10 in side, receiver 1 middle part and in buffer fluid outlet 10, heat indicator 9 be housed, in the pump working process, pump and mechanical seal and when sealflushing system's normal operation, the temperature of whole flushing system remains on uniform temperature substantially, can not take place to change too bigly.Have only when mechanical seal and sealflush the system works mal or because pump et out of order when causing mechanical seal work mal; can make the whole system works temperature build-up of sealflushing; 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, on fluid filling pump 12 liquid-feeding tubes, is shaped on system exhaust 13.Fluid filling pump P is a kind of instrument to receiver and flushing system topping up, before pump work or the time, break down and leak owing to mechanical seal work, all need to replenish buffer fluid, make the whole system's normal operation of sealflushing to the receiver and the system that sealflushes.Be shaped on liquid vessel leakage fluid dram 14 in receiver body 1 bottom, regularly discharge buffer fluid and impurity wherein in the receiver.

Working state structure such as Fig. 4, shown in Figure 5, buffer fluid on receiver inlet 10 is connected with gland buffer fluid outlet 19 on the medium-tight gland 17 by pipeline, buffer fluid outlet 11 is by the gland buffer fluid inlet 20 on pipeline and the buffering liquid sealing gland 18, the liquid compatible with pumped medium (being buffer fluid) is housed in the receiver 1, provides buffer fluid for sealflushing system.

Claims (1)

1. mechanical seal rinsing system liquid vessel, it is characterized in that: cooling water pipe (2) is housed in receiver (1), on cooling water pipe (2), be shaped on cooling water inlet (3) and cooling water outlet (4), 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 on buffer fluid outlet (10) in side, receiver (1) middle part, in buffer fluid outlet (10), heat indicator (9) is housed, be shaped on buffer fluid inlet (11) in buffer fluid outlet (10) below, in receiver (1) side fluid filling pump (12) is housed, on fluid filling pump (12) liquid-feeding tube, be shaped on system exhaust (13), be shaped on liquid vessel leakage fluid dram (14) in receiver (1) bottom.

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