JPS63145894A - Concentrated lubricator - Google Patents

Abstract

PURPOSE:To eliminate drawbacks without sacrifice of merits of a device employing only a single tube type or a double tube type distribution valve, by coupling respective delivery ports of a double tube type distribution valve having a plurality of delivery ports with supply ports of corresponding single tube type distribution valve through an oil supply pipe. CONSTITUTION:A motor pump 1 functions to feed grease through a short main oil supply pipe 12 to a double tube type distribution valve 11 from where grease is distributed through oil supply tubes 19a-19d to single tube type distribution valves 17a-17d and fed through an oil supply tube 20 to a lubrication point 21. When compared with a conventional system employing only a single tube type distribution valve, disablement at one lubricating point does not cause entire disablement at normal lubricating points. Since a double tube type distribution valve 11 is employed, a main piston operates reliably to the end of stroke even if pressure losses in the downstream of respective delivery ports 14a-14d are different.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a centralized lubrication and oil supply system that primarily supplies grease to rolling roll bearings in steel plants, conveyor bearings in sewage treatment plants, and the like.

(Prior art and its problems) There are two main types of distribution valves for centralized lubrication and oil supply systems: parallel-acting double-pipe type (double-line method) and progressive-acting single-pipe type (single-line method). Both methods are widely used, but the advantages of one are the disadvantages of the other, and both have their own problems.

For example, the double line system is mainly used for large equipment such as steel plants, and can cover both the number of oil supply ports and the piping distance.If there are currently 1000 oil supply ports (bearings, etc.), one of them is for the bearing or The advantage is that even if refueling becomes impossible due to clogging of piping, the remaining 9990 can be refueled without any problems. On the other hand, since two main pipes are required to connect to the distribution valve used for this purpose, piping costs increase. In addition, checking the 1000 indicator rods that move up and down with the operation of the distribution valve in order to find one place where refueling is not possible is difficult because the installation points of the distribution valve are widely scattered and the installation position However, it has the disadvantage that although it can be done in theory, it is not possible in practice due to constraints such as the operating conditions of the machine.

On the other hand, the single-line system is simple and inexpensive because whether there are 1,000 or 10 lubrication points, if one lubrication point becomes clogged, it becomes impossible to lubricate all the lubrication points. It has the advantage of being able to provide feedback. Also, since there is only one pipe to the distribution valve, there is an advantage that the piping cost is lower than that of the double line system. However, the advantage of being able to confirm fuel supply through feedback etc. is also a disadvantage. This is because, because of one point where refueling is not possible, refueling to the remaining normal refueling points is interrupted.

By the way, a double-pipe distribution valve is equipped with a main piston for pushing out grease and an indicator rod that is locked to the main piston, and lubrication can be confirmed by visually observing the movement of this indicator rod. However, as mentioned above, it is actually difficult to visually check the movements of a large number of indicator sticks.

Therefore, a refueling confirmation method has already been proposed in which a limit switch or the like is used to check whether or not the indicator rod has moved (for example, Utility Model Publication No. 58-35919, Utility Model Publication No. 58-18184). If an abnormality occurs in the oil supply part (bearing, etc.) such as locking or clogging (large back pressure), the indicator rod will not move, so the abnormality can be detected.
Even if a leak occurs due to damage to the oil supply piping beyond the distribution valve, the indicator rod moves, making it impossible to detect an abnormality. Furthermore, it is extremely uneconomical to provide such limit switches and the like at all of the large number of fuel fill ports.

(Means for Solving the Problems) In order to solve the above problems, the central lubrication/oil supply device of the present invention provides a central lubrication system for each discharge port of at least one double-pipe distribution valve having a plurality of discharge ports and a corresponding one for each discharge port. Connect the supply port of the single-pipe distribution valve with an oil supply pipe, and select the diameter of each oil supply pipe so that the flow resistance in the same number of oil supply pipes as the discharge ports of the multi-pipe distribution valve is approximately equal. , a detector disposed within the stroke range of each indicator rod that is locked to the piston of the front 11d double-pipe distribution valve, and detects each indicator rod, and a detector that detects each indicator rod by the signal from each of these detectors. Compare the time measured by each of these time measuring means with preset minimum and maximum times to determine if the measured time is outside the range from the minimum time to the maximum time. A comparison means for outputting an alarm signal when , and a notification means for notifying an abnormality by the alarm signal from each comparison means are provided, and these notification means are arranged in one place.

(Function) Lubricating oil such as grease is distributed from each discharge port of the multi-pipe distribution valve to each single-pipe distribution valve through the oil supply pipe, and then roughly distributed to each bearing etc. by each single-pipe distribution valve. Ru. At this time,
The movement of each indicator rod of the N-pipe distribution valve is detected by each detector, and based on the signals from these detectors, the timer measures the time the indicator rod moves between two points, and this time is determined in advance. Each comparison means compares the set minimum time and maximum time, and when the measured time is outside the range from the minimum time to the maximum time, the comparison means outputs an alarm signal. The disposed notification means is activated to notify of an abnormality.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a block diagram of one constituent unit of a centralized lubrication system in an embodiment of the present invention. Reference numeral 1 indicates a double-line type electric pump, and this electric pump 1 includes a pump body 2 and a pump body 2. , a tank 4 for storing grease as lubricating oil, a solenoid valve 5, and a relief valve 6. The tank 4 is provided with a follower plate 7 and a follower rod 8, and the solenoid valve 5 has a solenoid 9.10. The electric motor 3 and solenoid valve 5 are automatically operated by a timer not shown. Reference numeral 11 denotes a parallel-operated multi-pipe distribution valve, which has a plurality of discharge ports 14a to 14d and indicator rods 15a to 15d.
It is connected to the.

As is well known, this double-pipe distribution valve 11 has a built-in pilot piston and a main piston (both not shown). For example, when the electric motor 3 and the solenoid 10 of the solenoid valve 5 are energized, the electric pump The discharged grease reaches the double-pipe distribution valve 11 from the main oil supply pipe 13, first activates the pilot piston to open the oil passage to the main piston, then pushes the main piston upward in Fig. 1.
Grease corresponding to the stroke is pushed out to the discharge ports 14a to 14d. The indicator stick 15a
-15d is engaged with the main piston, and when the main piston goes up, it goes up at a constant speed, and when the main piston goes down, it goes down at a constant speed. The double-pipe distribution valve 1
A plurality of pumps 1 may be provided for one electric pump 1, as shown by imaginary lines in FIG.

16 is a double-pipe distribution valve mounting panel, and the double-pipe distribution valve 1
1 and an electric pump 1 are attached.

These double-pipe distribution valve 11 and electric pump 1 are arranged close to each other.

Reference numerals 17a to 17d are single-pipe distribution valves of a progressive operation type, and the supply ports 18a to 18d and the discharge port 1 of the multi-pipe distribution valve 11 are
4a~1=1.6 is the oil supply pipe 19a with a different diameter and length
~19d.

Reference numeral 20 denotes a grease supply pipe that guides grease from the discharge port of each of the single-pipe distribution valves 17a to 17d to a grease supply point 21 such as a bearing, and its length is determined to be approximately 5 m or less. Therefore, the flow resistance (pressure loss) downstream from the single-pipe distribution valves 17a to 17d becomes approximately equal, and each single-pipe distribution valve 1
For example, 40K to the supply ports 188 to 18d of 7a to 17d.
If a pressure of 9/cA is supplied, each refueling point 1-21
The optimum amount of grease can be supplied to the

The diameters of the oil supply pipes 198 to 19d are set so that the flow resistance (pressure loss) is approximately equal to that of the single pipe distribution valve 17.
It is determined in advance by calculation according to conditions (length, flow rate) such as the installation location of a to 17d. Therefore, the back pressure of the greasing pipe 20 and the refueling point 21 is
If d is all constant, the diameters of the oil supply pipes 19a to 19d become smaller as the installation positions of the single pipe distribution valves 17a to 17d are closer to the double pipe distribution valve 11.

Here, the double-pipe distribution valve 11 is of a single discharge type, that is, the grease is discharged from one place (
Although a type of distribution valve is used in which the grease is guided to the discharge ports 14a to 14d), a double discharge type multi-pipe distribution valve that guides the reciprocating grease discharge of the main piston to separate discharge ports may also be used.

FIG. 2 shows indicator rods 15a to 15d of the double-pipe distribution valve 11.
Although not shown in FIG. 1 to make the drawing easier to understand, the stroke end S of the indicator rods 15a to 15d of the multi-pipe distribution valve 11 is
1. During S2, a limit switch 2 is installed as a detector.
2.23 is installed. In FIG. 2, the limit switch 22.23L for the leftmost indicator rod 15a is not shown in order to simplify the drawing, but limit switches 22.23L are also individually applied to the other indicator rods 15b to 15d.
is provided. The indicator rods 15a to 15d contact the detection roller 24 of the limit switch 22 near the stroke end s1 on the upper end side, and contact the detection roller 25 of the limit switch 23 near the stroke end s2 on the lower end side. Note that a proximity switch, optical sensor, reed switch, potentiometer, etc. may be used as the detector. Figure 3 is a circuit block diagram of the abnormality detection circuit, where 26 is a counter circuit, 27 and 28 are comparison circuits,
2 are clock pulse generation circuits, 30 and 31 are inter-section setting devices, 32 is an alarm signal output circuit, 33 to 37 are AND circuits, and 38 is an OR circuit. The AND circuit 33 receives the off signal of the limit switch 22.
The AND circuit 34 takes the output signal of the AND circuit 33 and performs an AND operation with the ON signal of the AND circuit 33.
The output is ANDed with the clock pulse from the second clock pulse, and the counter circuit 26 outputs the [I clock pulse]. The counter circuit 26 is reset by the off signal of the motor 3. The comparison circuit 27 compares the count value C of the counter circuit 26 with a set value T corresponding to the maximum time set in the time setter 30.
If the count value c b < set value lower m or more, an abnormality signal is output to the alarm signal output circuit 32 . The comparison circuit 28 compares the count value C of the counter circuit 26 with a set value Tn corresponding to the minimum time set in the time setter 31, and if the count value C is smaller than the set value Tn, the AND circuit 37 Outputs an abnormal signal. The AND circuit 35
ANDs the ON signal of the limit switch 22 and the ON signal of the limit switch 23, and outputs the AND circuit 36.
takes the AND of the off signal of the limit switch 22 and the off signal of the limit switch 23. The logical sum circuit 38
The AND circuit 37 ANDs the output signal of the AND circuit 35 and the output signal of the AND circuit 36, and the AND circuit 37 ANDs the output signal of the comparison circuit 28 and the output signal of the OR circuit 38 to issue an alarm. An abnormal signal is output to the signal output circuit 32.

FIG. 4 is an explanatory diagram of the notification means, and 39 is the central control room 4.
0 is an abnormality display board, 41 is an indicator light such as a large number of light emitting diodes attached to the three abnormality display boards, and 42 is a buzzer attached to the abnormality display board 39. That is, the first
One constituent unit of the centralized lubrication/oil supply system shown in the figure is distributed at various locations in the factory, and all support rods 15a to 15d of the double-pipe distribution valve 11 are connected to each other as shown in FIG. An abnormality detection circuit is provided, and an indicator light 41 is provided corresponding to the alarm signal output circuit 32 of each abnormality detection circuit.

Only one buzzer 42 is provided, and it operates no matter which alarm signal output circuit 32 outputs an alarm signal. The entire abnormality detection circuit may be installed in the central control room 40, or may be housed in the double-pipe distribution valve mounting panel 16 for each constituent unit of the centralized lubrication and oil supply system.

Next, the effect will be explained. When the electric motor 3 and the solenoid 10 of the solenoid valve 5 are energized by a timer (not shown), the electric pump 1 is activated, and the oil is passed through the short main oil supply pipe 12 to the double-pipe distribution valve 1.
Grease is sent to 1, and from there to oil supply pipes 198 to 19d.
The grease is then distributed to the single-pipe distribution valves 17a to 17d, and from the single-pipe distribution valves 17a to 17d, the grease is supplied to the refueling point 21 via the greasing pipe 20.

At this time, the indicator rods 15a to 15d are at the stroke end S.
It rises from 2 to 81 side. When the detection roller 25 of the limit switch 23 is kicked by the indicator rods 15a to 15d and the limit switch 23 is turned on, the limit switch 2
2 is off, the output of the AND circuit 33 becomes high level, and the clock pulse from the clock pulse generation circuit 29 is input to the counter circuit 26 via the AND circuit 34 and counted. Indicator sticks 15a-15d are s1-
Go up to near rotor end S1 and limit switch 2
When the second detection roller 24 is kicked, the limit switch 22 is turned on, so the output of the AND circuit 33 becomes low level, and the AND circuit 34 no longer outputs a clock pulse. In other words, the count value C of the counter circuit 26 is proportional to the time since the limit switch 23 is turned on, and this count value C corresponds to the maximum time set in the time setting device 30 by the comparison circuit 27. It is compared with the set value Tm. The comparison circuit 27 outputs an abnormal signal to the alarm signal output circuit 32 when the count value C exceeds the set value Tm corresponding to the maximum time. That is, if the count value C is greater than or equal to the set value Tm corresponding to the maximum time, it can be determined that the movement of the indicator rods 15a to 15d has become abnormally slow due to clogging of the piping or the like. As a result, the alarm signal output circuit 32
outputs an alarm signal and drives the corresponding indicator lights 7 and 11 of the three abnormality display boards and the buzzer 42.

On the other hand, the comparison circuit 28 compares the count value C with a set value Tn corresponding to the minimum time set in the time setter 31, and if the count value C is smaller than the set value Tn corresponding to the minimum time, An abnormal signal is outputted to the AND circuit 37. When the indicator rods 15a to 15d are used, the limit switch 22.
23 are both on, in other words, the indicator rods 15a to 15d
When reaches near the stroke end S1, the output of the AND circuit 35 becomes high level, the output of the OR circuit 38 also becomes high level, and the abnormal signal from the comparison circuit 28 is passed through the AND circuit 37. It is output to the alarm signal output circuit 32. In other words, the fact that the scale value C is smaller than the set value Tn corresponding to the minimum time when the indicator rods 15a to 15d rise to near the stroke end S1 means that the movement of the indicator rods 15a to 15d is caused by a leak in the piping, etc. It can be determined that the speed has become abnormally fast. In response, the alarm signal output circuit 32 outputs an alarm signal and drives the indicator lights 41 and buzzer 42 corresponding to the three abnormality display boards.

Note that the alarm signal from the alarm signal output circuit 32 is displayed in different display colors of the indicator lights 41-15 = so that the abnormal signal from the comparison circuit 27 and the abnormal signal from the comparison circuit 28 can be distinguished. Alternatively, the same alarm signal may be output without distinction, and the alarm signal may be displayed in the same color.

The solenoid 10 of the electric motor 3 and solenoid valve 5 is activated by the timer.
When the power to the counter circuit 26 is cut off, the counter circuit 26 is cleared.

When the electric motor 3 and the solenoid 9 of the solenoid valve 5 are energized by the timer, the flow of grease in the main oil supply pipe 12, 13 is reversed, and the indicator rods 15a to 15d are lowered. Then, as in the case of rising, the count value C of the counter circuit 26 and the set value Tm corresponding to the maximum time set in the time setter 30.31.
and the set value Tn corresponding to the minimum time are compared by the comparison circuit 27 and the comparison circuit 28, and if an abnormality is detected, an abnormality signal is output to the alarm signal output circuit 32. However, when the pointer sticks 15a to 15d are lowered, an abnormality signal from the comparator circuit 28 is outputted to the alarm signal output circuit 32 via the AND circuit 37 from the time when the limit switches 22, 23 are turned off.

When the electric motor 3 and the solenoid 9 of the solenoid valve 5 are de-energized by the timer, the counter circuit 26 is cleared.

In this way, in this embodiment, the discharge port 1 of the multi-pipe distribution valve 11 is
4. Since the single pipe type distribution valves 17a to 17d are connected to the ports a to 14d, unlike the conventional device using only the single pipe type distribution valve, all the remaining normal oil supply points are connected to one place where oil cannot be supplied. There is no possibility that the vehicle will be unable to refuel. In addition, since a double-pipe distribution valve 11 is adopted, each discharge port 148 to 1
Even if the pressure loss after 4d is uneven in size, the main piston operates reliably to the end of its stroke, thus improving oil supply accuracy.

In addition, compared to the conventional device that uses a dual-pipe distribution valve alone, it has the following advantages. That is, since the main oil supply pipes 12 and 13 to the double-pipe distribution valve 11 are extremely short (within 1 m for each double-pipe distribution valve 11), the main oil supply pipes 12 and 1
The residual pressure at the time of switching with No. 3 can be ignored, the residual pressure instantly returns to zero, and the amount of compressed grease in the oil supply main pipes 12 and 13 can also be ignored.

Additionally, in the past, the length of the high-pressure piping (the piping from which if the piping was damaged and leaked, the amount of oil flowing from the pump would be the same as that of the pump, and the leak would continue continuously while the pump was operating) was too long. In many cases, the total length is several tens of meters or more, but in this example, the main oil supply pipe 12, 13, which is a high-pressure system pipe,
is extremely short, with a total length of around 2 m for each constituent unit of the central lubrication/oil supply system, and therefore the number of high-pressure pipes and fittings used is extremely reduced, and the probability of leakage is also close to zero.

In addition, in the past, multi-pipe distribution valves were often installed separately in various parts of the machine that needed to be lubricated. It was necessary to go to the location where the valve was installed, but in this example, it was necessary to go to several locations in the factory where the double-pipe distribution valve 11 was installed.
-1 allows you to adjust the oil amount for all units.

In addition, by significantly shortening the high-pressure system - secondary piping,
Oil supply pipes 198 to 19d (medium pressure system secondary piping) between the double pipe type distribution valve 11 and single pipe type distribution valves 17a to 17d, and the oil supply pipe from the single pipe type distribution valves 17a to 17d to the oil supply point 21 Even if the three stages of piping of 20 (low-pressure greasing pipes) are totaled, the internal volume of the pipes is often significantly reduced, and in actual practice it is less than a fraction of the volume. Therefore, the amount of grease held in the pipe is reduced, the rotation period of the grease is shortened, and
Freshness also improves.

In addition, in conventional equipment that uses only a double-pipe type distribution valve, the installation position of the double-pipe type distribution valve must be in a place where it is possible to inspect the indicator rod and adjust the oil balance, but in this example, direct oil supply is possible. The single-pipe distribution valves 17a to 17d that perform this are progressive operation type distribution valves, so the above conditions are not required, and the range of selection of mounting positions is widened.

Furthermore, the above-mentioned amazing shortening of the high-pressure system piping and significant reduction in the internal volume of the pipe mean a reduction in piping materials and man-hours for piping processing. Therefore, reducing the cost of piping materials and piping processing, which accounts for about 70% of the price structure of a centralized lubrication system including installation costs, also helps meet customer demands for cost reduction.

In addition, the above-mentioned savings in piping materials and reduction in piping man-hours contribute to shortening the construction period. Generally, when mechanical equipment is newly installed or repaired, the installation and assembly of the machinery is carried out in advance, and the installation and piping of the central lubrication system often has to be carried out at the end of the construction process. Therefore, if the installation or assembly of the main engine is delayed in construction work that is subject to construction period restrictions, there is a strong tendency that the construction period for the central lubrication system will be compressed, and the construction will likely become sloppy, resulting in grease leakage or dirt entering the circuit. It is expected that this will likely occur, and that it will often be the cause of complaints at a later date.

In particular, in the conventional double-pipe piping system, the distance of the high-pressure main oil supply pipe is long, and the connection to the double-pipe distribution valve usually requires many piping techniques and man-hours. Budget constraints tend to lead to shoddy piping. However, in this embodiment, not only is the number of man-hours reduced due to the above-mentioned savings in piping materials, but the fact that the number of high-pressure system piping requiring the above-mentioned piping technology is close to zero may be the biggest cause of shortening the construction period.

In addition, since the number of multi-pipe distribution valves 11 can be significantly reduced, the number of limit switches 22, 23 and abnormality detection circuits provided corresponding to each indicator rod 15a to 15d of the multi-pipe distribution valve 11 can be reduced. It can be significantly reduced and is very economical.

Furthermore, when the moving time between two points of the pointing sticks 15a to 15d is longer than a preset maximum time or shorter than a preset minimum time, the indicator light 41 and the buzzer 42 can issue an alarm. In other words, the greasing part is locked or the back pressure is thick and clogged)
If this occurs, the movement of the indicator rods 15a to 15d becomes abnormally slow or stops moving, an alarm is issued because the maximum time is exceeded, and if a leak occurs in the piping after the double-pipe distribution valve 11, Since the movement of the pointing sticks 15a to 15d becomes abnormally fast and does not reach the minimum time, a warning can be issued in the same way. Therefore, it is possible to reliably detect not only whether or not the multi-pipe distribution valve 11 is simply discharging grease, but also any abnormality in the piping and greasing portions after the multi-pipe distribution valve 11, thereby greatly improving safety.

In addition, since notification means such as indicator lights 41 and buzzers 42 are installed on three abnormality display boards in the central control room 40, workers in the central control room 40 can immediately know about abnormalities.
Able to respond quickly. In particular, when one component of the centralized lubrication system is distributed throughout the factory, there is no need to go around the large factory and sequentially check the indicator rods 15a to 15d of the double-pipe distribution valve 11. It is very convenient to be able to know about abnormalities even when you are 40 years old.

(Another embodiment) As shown in FIG. 5, the abnormality detection circuit causes the counter circuit 26 to perform a counting operation when the electric motor 3 is turned on, and when the electric motor 3 is turned on, the abnormality detection circuit performs an AND operation between the ON signal of the limit switch 22 and the signal from the comparison circuit 28. is the AND of the off signal of the limit switch 22 and the signal from the comparison circuit 27, and when falling, the AND of the off signal of the limit switch 23 and the signal from the comparison circuit 28, or the on signal of the limit switch 23 and the signal from the comparison circuit 27. Alarm signal output circuit 3 by AND with the signal from
An abnormal signal may be supplied to the terminal 2.

In this way, even if the electric motor 3 is turned on, the indicator rod 15a
If ~15d does not move, the abnormality can be notified at an early stage. In addition, in FIG. 5, 34a, 35a, 35b, 36
a, 36b are AND circuits, 38a, 38b4 . is a logical sum circuit.

FIG. 6 and FIG. 7 show still another embodiment, and FIG.
As shown in the figure, one limit switch 4 is detected at the center of the stroke of the indicator rods 15a to 15d.
4 may be provided.

In this case, the abnormality detection circuit has a configuration as shown in FIG.

In FIG. 7, 45 to 47 are AND circuits, and 48 is an OR circuit. In this circuit, the motor 3 due to the timer
The counter circuit 26 starts counting at the same time as the power is applied to the motor 3, and the counter circuit 26 starts counting at the same time as the power is turned off to the motor 3.
is cleared.

When the indicator rods 15a to 15d are raised, one shot occurs when the limit switch 44 is switched from off to on. The output of the OR circuit 48 is set to high level by the pulse, and the abnormal signal from the comparison circuits 27 and 28 is outputted to the alarm signal output circuit 32 via the AND circuits 46 and 47. Also, when the indicator rods 15a to 15d are lowered, the limit switch 47! When I is switched from on to off, the one-shot pulse makes the output of the OR circuit 48 high level, and the abnormal signal from the comparator circuit 27.28 is sent to the alarm signal output circuit via the AND circuit 46.47. Output to 32. Reference numeral 49 designates a flip-flop circuit for detecting that the indicator rods 15a to 15d have stopped; The abnormal signal is input to the alarm signal output circuit 32. If the configuration is changed like this, the second
Although the accuracy is slightly lower than in the embodiments shown in FIGS. and 3, one limit switch 44 can be used for each pointer rod 15a to 15d.

(Effects of the Invention) As explained above, according to the present invention, each discharge port of at least one multi-pipe distribution valve having a plurality of discharge ports and the corresponding supply port of a single-pipe distribution valve are supplied with oil. In addition to connecting with pipes, the diameter of each oil supply pipe was selected so that the flow resistance in the same number of oil supply pipes as the discharge ports of the multi-pipe distribution valve was approximately equal. All of the disadvantages of the centralized lubrication system using only pipe-type distribution valves can be eliminated without compromising the advantages. Moreover, the number of detectors, timing means, comparison means, etc. can be greatly reduced compared to the case where only a double-pipe distribution valve is used, making it very economical.

In addition, there are detectors that are disposed within the stroke range of each indicator rod that is locked to the piston of the double-pipe distribution valve, and that detect each indicator rod.
A timing means for measuring the travel time between points and the time measured by each of these timing means are compared with preset minimum and maximum times to determine if the measured time is outside the range from the minimum time to the maximum time. A comparison means that outputs an alarm signal at a certain time, and a notification means that reports an abnormality using the alarm signal from each of these comparison means are installed. It is possible to know the situation in one place, and to quickly respond to the occurrence of an abnormality.Especially when one component of the centralized lubrication system is distributed over a large factory, it is possible to monitor the movement of the indicator rod by going around the factory. Although checking is a very difficult task, by using the present invention, all abnormalities can be detected in one place, and the abnormalities can be detected easily, quickly, and reliably.

Further, when the moving time between two points of the pointer stick is longer than a preset maximum time or shorter than a preset minimum time, the notifying means can issue an alarm. If a lock or large back pressure (clog) occurs in the Zunawara greasing part, the movement of the indicator rod becomes abnormally slow or stops moving, and an alarm is issued because the maximum time is exceeded. If a leak occurs in the piping after the valve, the indicator rod moves abnormally fast and does not reach the minimum time, so an alarm can be issued in the same way. Therefore, it is possible to reliably detect not only whether or not the multi-pipe distribution valve is simply discharging grease, but also any abnormalities in the piping and greasing parts after the 'FJ pipe distribution valve, thereby greatly improving safety.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of one constituent unit of a centralized lubrication system according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the arrangement of a detector for detecting the indicator rod of a double-pipe distribution valve, and Fig. 3 is an abnormality diagram. FIG. 4 is a circuit block diagram of the detection circuit, FIG. 4 is an explanatory diagram of the notification means, FIG. 5 is a circuit block diagram of the abnormality detection circuit in another embodiment, and FIG. 6 is a circuit block diagram of the multi-pipe distribution valve in yet another embodiment. FIG. 7 is an explanatory diagram of the arrangement of the detector for detecting the pointer stick, and FIG. 7 is a circuit block diagram of the same abnormality detection circuit. 11...Double pipe distribution valve, 14a-14d...Discharge port, 15a-15d...Indicator rod, 17a-17d...
Single pipe distribution valve, 18a~18d... Supply port, 19a~
19d...Oil supply pipe, 22.23.44...Limit 1
~Switch, 26...Counter circuit, 27.28...
・Comparison circuit, 29...Resistance pulse generation circuit, 3
0.31...Time setting device, 32...Alarm Shintan output circuit, 41...Indicator light, 42...Buzzer

Claims (3)

[Claims] (1) Connecting each discharge port of at least one double-pipe distribution valve having a plurality of discharge ports and the corresponding supply port of the single-pipe distribution valve with an oil supply pipe, and The diameter of each oil supply pipe is selected so that the flow resistance in the same number of oil supply pipes as the number of discharge ports is approximately equal, and each is arranged within the stroke range of each indicator rod that is locked to the piston of the multi-pipe distribution valve. A detector is provided to detect each indicator stick, a timing means for timing the travel time between two points of each indicator stick based on the signals from each of these detectors, and a time measuring means that measures the time measured by each of these timing means and a predetermined time. Comparison means that compares the set minimum time and maximum time and outputs an alarm signal when the measured time is outside the range from the minimum time to the maximum time, and an alarm signal from each of these comparison means to notify an abnormality. What is claimed is: 1. A centralized lubrication and oil supply system, characterized in that a notification means is provided, and these notification means are arranged in one place. (2) The centralized lubrication/oil supply system according to claim 1, wherein the detectors are arranged at two points within the stroke range of the indicator rod. (3) The centralized lubrication/oil supply system according to claim 1, wherein the detector is arranged at one point in the middle within the stroke range of the indicator rod.