CN211163536U

CN211163536U - Automatic control device of grinding machine paper filtering system

Info

Publication number: CN211163536U
Application number: CN201921510411.XU
Authority: CN
Inventors: 高玉春; 尹红滨; 尚国忠; 梁振威; 李秋阳
Original assignee: Tangshan Iron and Steel Group Co Ltd; HBIS Co Ltd Tangshan Branch
Current assignee: Tangshan Iron and Steel Group Co Ltd; HBIS Co Ltd Tangshan Branch
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-08-04
Anticipated expiration: 2029-09-11

Abstract

The utility model relates to a grinding machine paper filtration system's automatic control device, including three-phase circuit breaker QS1, contactor KM, the paper feed motor, double-phase circuit breaker QS2, transformer TC, rectifier bridge Z L, filter capacitor C, earth-leakage protector L B, control button SB, contactor coil KM, level sensor TZ corresponds with the high cooperation of the grinding fluid in the filtering tank box, thereby this device fundamentally has ensured the grinding fluid quality and has ensured roll grinding quality, the filtration system fault rate reduces by a wide margin, the paper feed control is sensitive reliable, the point of the maintainer of being convenient for is examined, the maintenance, the at utmost has reduced the time that the trouble stopped the machine, the work efficiency of grinding machine in the use has greatly been improved.

Description

Automatic control device of grinding machine paper filtering system

Technical Field

This patent application belongs to paper filtration control system technical field, and more specifically says, relates to a Wadrichs grinding machine paper filtration system's automatic control device.

Background

In the steel rolling production process, a roll is used for rolling. The roll grinder is an important device for grinding the roll surface of the roll according to various roll shape, precision, finish degree and other parameters required by steel rolling production, and is also a core device for steel rolling production. The grinding roller workshop is designed in a matching way according to a steel rolling production line and generally comprises 2-3 roller grinding machines, and most of the selected roller grinding machines are imported equipment. Because the steel rolling production belongs to continuous production, the working efficiency of the grinding machine is very important.

The grinding fluid which is not filtered in the grinding process of the roller contains a large amount of grinding wheel mud, and the grinding wheel mud is generally filtered by a magnetic filtering system and a paper filtering system and then repeatedly recycled in a certain period. The magnetic filtering system is only responsible for removing impurities containing steel and iron in the grinding fluid, other impurities contained in the grinding fluid are finally filtered by the paper filtering system, and the paper filtering is used as the last process of the grinding fluid filtering, so that the quality of the filtered grinding fluid is extremely important. If the filtering is not clean, the grinding fluid contains impurities which can cause the problems of roller surface scratching, poor grinding quality, high roller consumption and the like, and the roller grinding process and normal use are seriously influenced.

The original paper filtering system of the Wadrichs grinding machine is a float type paper filtering system, and because the float running mechanism has strict requirements on medium environment, and a large amount of silicon dioxide components in grinding fluid seriously restrict the normal running of the float type paper filtering system, the original paper filtering system is easy to lose control effect in actual use. The control that often takes place to lead to because of the float arm card is dead often controlled to be invalid, and the grinding fluid that does not filter overflows and pollutes dry clean grinding fluid and the phenomenon of paper feed out of control in the cabinet and often takes place, not only can not ensure the filtration quality of grinding fluid, still causes the extravagant a large amount of filter papers. The prior float type paper filtering system has the defects that the grinding quality problem is caused for many times and the failure rate is very high. As the filterable control system of paper, how can guarantee filtration quality, reduce mechanical failure, accurate control paper filter equipment, be an important aspect of roll grinder normal operating, also the utility model discloses the original intention that grinding machine paper filter control equipment launched.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve is automatic control device, overcomes because of former float mechanism fault rate height, drawback such as paper feed control inaccuracy that emery wheel mud pollution seriously leads to, reaches the purpose of guaranteeing filtration quality, reduction mechanical failure, accurate control paper filtration system under complicated operating mode operation environment.

In order to solve the above problem, the utility model discloses the technical scheme who adopts is:

an automatic control device of a grinder paper filtering system comprises a three-phase circuit breaker QS1 connected with 380V alternating voltage, a contactor KM connected with each phase of a three-phase circuit breaker QS1, a paper feeding motor connected with the contactor KM, a two-phase circuit breaker QS2 connected with two phases of a three-phase circuit breaker QS1, a transformer TC connected with a two-phase circuit breaker QS2, a rectifier bridge Z L connected with the voltage transformation output end of the transformer TC, a filter capacitor C connected between the rectification positive output end and the rectification negative output end of the rectifier bridge Z L in series, a leakage protector L B connected with the filter capacitor C in parallel, a control button SB connected with the rectification negative output end of the rectifier bridge Z L in series, a contactor coil KM connected with the control button SB in series, and a liquid level sensor TZ connected with the control button SB in parallel, wherein the liquid level sensor TZ corresponds to the height of grinding liquid in a filter tank body in a matched mode, and the other end of the contactor coil KM.

The utility model discloses technical scheme's further improvement lies in: the transformer TC converts the 380V ac power into 24V ac power.

The utility model discloses technical scheme's further improvement lies in: the liquid level sensor TZ is a contact type liquid level sensor, and a probe of the contact type liquid level sensor is arranged in the filtering tank body.

The utility model discloses technical scheme's further improvement lies in: level sensor TZ is non-contact level sensor, non-contact level sensor includes the sensor body, last electrode and bottom electrode of both ends about setting at the sensor body, it sets up the upper end at the sensor body through the connecting rod coupling to go up the electrode, the bottom electrode passes through the auxiliary rod coupling and sets up the lower extreme at the sensor body, go up electrode and bottom electrode respectively with the top and the bottom laminating cooperation of filtering ponds box, the middle part of sensor body is provided with the connecting piece perpendicularly, the one end that the sensor body was kept away from to the connecting piece is provided with connection opening, the filtering ponds box is the box of non-conductor material.

The utility model discloses technical scheme's further improvement lies in: the upper electrode and the lower electrode are soft electric conductors, and the filter tank body is a plastic or ceramic tank body.

The utility model discloses technical scheme's further improvement lies in: the soft electric conductor is a soft copper plate or conductive rubber.

The utility model discloses technical scheme's further improvement lies in: the connecting piece is an annular hoop.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains is: the utility model discloses it is dead to have changed the mechanical device card that traditional float formula paper filtration system often takes place in grinding machine paper filtration system uses, makes the control system inefficacy lead to the grinding fluid often excessive and shut down the disadvantage of overhauing, and the process of overhauing will cause the secondary pollution of grinding fluid, makes the quality of grinding fluid can not obtain the assurance, can cause the problem that exists for a long time such as roll surface fish tail, grinding quality is poor, roll consumption height indirectly. Adopt the utility model discloses behind the grinding machine paper filter control device, through using verification paper filtration system fault rate to reduce by a wide margin, the sensitive reliable, the maintainer's of being convenient for point inspection, maintenance of paper feed control, thereby fundamentally has ensured the grinding fluid quality and has ensured roll grinding quality. The device has the advantages of simple structure, convenient installation and use, maximally reducing the time of fault shutdown, and greatly improving the working efficiency of the grinding machine in the use process.

The utility model provides a non-contact level sensor makes the structural design who hugs closely the filtering ponds box through making whole non-contact level sensor, utilizes the principle that electrode and filtering ponds box cooperation formed electric capacity, when effectual grinding fluid liquid level carries out the measurement in the filtering ponds box, unique structure makes its convenient use widely, has stronger suitability.

Drawings

Fig. 1 is a circuit diagram of the present invention;

FIG. 2 is a schematic structural view of the non-contact liquid level sensor of the present invention;

the device comprises a three-phase circuit breaker QS1, a two-phase circuit breaker QS2, a two-phase circuit breaker KM, a two-phase circuit breaker QS 353, a two-phase circuit breaker KM, a paper feeding motor, a three-phase transformer TC, a three-phase transformer 6, a rectifier bridge Z L, a two-phase rectifier bridge 7, a filter capacitor C, a filter capacitor 8, a leakage protector L B, a control button SB 10, a liquid level sensor TZ, a liquid level sensor 11, a contactor coil KM, a sensor body 101, a.

Detailed Description

The present invention will be described in further detail with reference to examples.

The utility model discloses a grinding machine paper filtration system's automatic control device, include the three-phase circuit breaker QS 11 who is connected with 380V alternating voltage, contactor KM 3 all is connected with every looks of three-phase circuit breaker QS 11, the paper feed motor 4 of being connected with contactor KM 3, double-phase circuit breaker QS 22 with double-phase connection of three-phase circuit breaker QS 11, transformer TC5 of being connected with double-phase circuit breaker QS 22, rectifier bridge Z L6 of being connected with transformer TC 5's vary voltage output end, establish ties filter capacitor C7 between rectifier bridge Z L6's the anodal output of rectification and rectification negative pole output, earth-leakage protector L B8 parallelly connected with filter capacitor C7, control button SB 9 of establishing ties with rectifier bridge Z L6's rectification negative pole output, contactor coil KM 11 of establishing ties with control button SB 9, level sensor TZ10 parallelly connected with control button SB 9, level sensor TZ10 corresponds with the high cooperation of the grinding fluid in the filter tank box, the other end rectifier bridge rectifier coil KM L6's the anodal output of rectification.

The transformer TC5 converts 380V alternating current into 24V alternating current, the liquid level sensor TZ10 is a contact type liquid level sensor, and a probe of the contact type liquid level sensor is arranged in the filter tank body.

Or liquid level sensor TZ10 is non-contact liquid level sensor, non-contact liquid level sensor includes sensor body 101, set up last electrode 102 and lower electrode 103 at sensor body 101 upper and lower both ends, it sets up the upper end at sensor body 101 to go up electrode 102 through connecting rod 104 coupling, lower electrode 103 passes through auxiliary rod 105 coupling and sets up the lower extreme at sensor body, go up electrode 102 and lower electrode 103 respectively with the top and the bottom laminating cooperation of filtering ponds box, the middle part of sensor body 101 is provided with connecting piece 106 perpendicularly, the one end that sensor body 101 was kept away from to connecting piece 106 is provided with connection opening 107, the filtering ponds box is the box of non-conductor material.

The upper electrode 102 and the lower electrode 103 are both soft conductors, and the soft conductors are soft copper plates or conductive rubber. The filter tank body is a plastic or ceramic tank body. The connector 106 is a loop anchor ear. The upper electrode 102 is plate-shaped, and the lower electrode 103 is plate-shaped or ring-shaped with an opening (see fig. 2), so that the bottom part of the filter tank body can be attached or hung conveniently.

The non-contact liquid level sensor effectively measures the grinding fluid in the filtering tank body by utilizing the principle that the upper electrode 102 and the lower electrode 103 form capacitance with the filtering tank body. The specific principle is as follows: the circuit board of the non-contact liquid level sensor applies a pulse direct current voltage with a negative pole (for example, -10V) to the upper electrode 3 and the lower electrode 5, so that a potential difference exists between the upper electrode 3 and the lower electrode 5, and a stable electric field is formed between the upper electrode 3 and the lower electrode 5. The on and off states of the pulsed dc current alternate. In the power-on state, the capacitor is actually charged due to the characteristic of isolating direct current and direct current. When the capacitor is in the power-on state, the capacitor discharges, and the capacitance value can be judged according to the discharge time of the capacitor. When the grinding fluid of the filter tank body is empty, the internal space of the filter tank body is filled with air. Air constitutes the dielectric of the capacitor, and a base capacitance value C0 can be measured. When grinding fluid is present in the filter tank body, the grinding fluid can form part of dielectric medium of the capacitor, and a capacitance value C1 can be measured. Since the grinding fluid and air have different dielectric constants, C1 and C0 are different from each other, and the capacitance difference Δ C, Δ C being C1-C0 is obtained by subtracting the two, whereby the level of the grinding fluid in the filter tank body can be obtained. The capacitance difference value delta C and the liquid level of the grinding fluid in the filter tank body are basically in a linear relation, so that the liquid level can be monitored in real time.

When the paper feeding motor 4 of the grinding machine normally works, along with continuous accumulation of grinding wheel mud on filter paper, the grinding liquid surface on the upper layer of the filter paper in the filter tank body rises along with the accumulation of the grinding wheel mud, when the grinding liquid surface rises to reach the height of a preset liquid level sensor TZ10, the liquid level sensor TZ10 forms a loop through grinding liquid and DC24+, a direct current contactor coil KM 11 is attracted, after the attraction of the contactor coil KM 11, a paper feeding motor M4 rotates to drive the filter paper to move through a transmission device, waste paper with the accumulated grinding wheel mud is moved into a recycling box and new paper is replenished into the filter tank body, so that the grinding liquid level is reduced, after the liquid level sensor TZ10 is separated from contact with the grinding liquid level KM, the contactor coil KM 11 loses power to disconnect the contactor KM 3, the paper feeding motor M4 stops rotating, the liquid level sensor TZ10 and the height difference of the liquid level sensor TZ10 determines the grinding liquid level to be in contact with the grinding liquid level KM, the safety paper feeding motor SB, and the safety paper feeding motor SB control SB 26 determines the occurrence of the paper feeding operation of the paper leakage and prevents the paper feeding operation of the paper feeding motor SB 26.

Claims

1. An automatic control device of a grinder paper filtering system is characterized by comprising a three-phase breaker QS1 (1) connected with 380V alternating voltage, a contactor KM (3) connected with each phase of the three-phase breaker QS1 (1), a paper feeding motor (4) connected with the contactor KM (3), a two-phase breaker QS2 (2) connected with two phases of the three-phase breaker QS1 (1), a transformer TC (5) connected with the two-phase breaker QS2 (2), a rectifier bridge Z L (6) connected with the transformation output end of the transformer TC (5), a filter capacitor C (7) connected between the rectification positive output end and the rectification negative output end of the rectifier bridge Z L (6) in series, a leakage protector L B (8) connected with the filter capacitor C (7) in parallel, a control button SB (9) connected with the rectification negative output end of the rectifier bridge Z L (6) in series, a contactor coil KM (11) connected with the control button SB (9) in series, a liquid level sensor TZ (10) connected with the rectifier bridge, and a grinding liquid level sensor (L) in a box body, wherein the rectifier bridge is matched with the rectification liquid level sensor KM (6) in series.

2. The automatic control device of a grinder paper filter system as claimed in claim 1, wherein: the transformer TC (5) converts 380V alternating current into 24V alternating current.

3. The automatic control device of a grinder paper filter system as claimed in claim 2, wherein: the liquid level sensor TZ (10) is a contact type liquid level sensor, and a probe of the contact type liquid level sensor is arranged in the filtering tank body.

4. The automatic control device of a grinder paper filter system as claimed in claim 2, wherein: level sensor TZ (10) is non-contact level sensor, non-contact level sensor includes sensor body (101), set up last electrode (102) and bottom electrode (103) at sensor body (101) upper and lower both ends, it sets up the upper end at sensor body (101) to go up electrode (102) through connecting rod (104) coupling, bottom electrode (103) set up the lower extreme at sensor body through auxiliary rod (105) coupling, go up electrode (102) and bottom electrode (103) respectively with the top and the bottom laminating cooperation of filtering ponds box, the middle part of sensor body (101) is provided with connecting piece (106) perpendicularly, the one end that sensor body (101) were kept away from in connecting piece (106) is provided with connection opening (107), the filtering ponds box is the box of non-conductor material.

5. The automatic control device of a grinder paper filter system as claimed in claim 4, wherein: the upper electrode (102) and the lower electrode (103) are both soft electric conductors, and the filter tank body is a plastic or ceramic tank body.

6. The automatic control device of a grinder paper filter system as claimed in claim 5, wherein: the soft electric conductor is a soft copper plate or conductive rubber.

7. The automatic control device of a grinder paper filter system as claimed in claim 6, wherein: the connecting piece (106) is an annular hoop.