JPS61294300A - Centralized lubricator - Google Patents

Abstract

PURPOSE:To achieve positive detection of leakage behind a distributing valve by providing a detecting sensor disposed within the length of stroke of an indicating rod locked to a piston of the distributing valve so as to give an alarm when the time required for the indicating rod to move between two positions is out of the range between a predetermined maximum time and a predetermined minimum time. CONSTITUTION:In the discharging stroke in which an indicating rod 2e moves upwardly, the difference from the time the indicating rod 2e kicks a roller 6 to the time it kicks a roller 7, that is the difference from the time a switch B is turned on to the time a switch A is turned on, is detected. Then, in the descending stroke of the indicating rod 2e, the difference from the time the indicating rod 2e releases the roller 7 and the time it releases the roller 6, that is the difference from the time the switch A is turned off and the time the switch B is turned off, is detected, whereby any accident in the oil feed pipe and any accident in the oil feed portion can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a centralized lubrication and oiling system for primarily supplying grease to rolling roll bearings in steel plants, bearings in 1ζ water treatment plants, and the like.

(Prior art) There are two main types of centralized 1lyJWI oil supply systems: double line system (double pipe type...parallel operation type) and single line system (
There is a single-tube type (progressive type), and both have a main piston for pushing out grease and an indicator rod that is locked to the main piston, and lubrication is performed by visually observing the movement of this indicator rod. It is now possible to confirm. Conventionally, a refueling confirmation method has already been proposed in which a limit switch or the like is used to confirm whether or not the above-mentioned indicator rod has moved (for example,
8-35919, Utsukko Sho 58-18184>. However, in that case, if an abnormality occurs in the greasing parts (bearings, etc.) beyond the distribution valve, such as sagging or large back pressure (clogging), the indicator rod will not move, so it is possible to detect the abnormality. Even if a leak occurs due to damage to the greasing pipe beyond the distribution valve, the indicator rod will move, making it impossible to detect the abnormality.

(Objective of the Invention) An object of the present invention is to make it possible to reliably detect locking and clogging (back pressure fitting) of the greasing portion and leakage from the distributing valve onward.

(Structure of the Invention) The present invention is characterized in that a detection sensor is disposed within the stroke range of an indicator rod that is locked to a piston of a distribution valve, and the movement time between two points of this indicator rod is set in advance for a maximum time and a minimum time. This is a centralized 1111 lubricating system characterized in that the circuit of the control panel is configured so as to issue an alarm when it is out of the range.

(Embodiment) Reference numeral 1 in FIG. 1 is a double-line type electric pump having a switching valve 1a, and includes a tank lb, a follower plate 1d, a follower rod lc, and a motor 1e. 2 is a double-line distribution valve, which is connected to the manual pump 1 through two main oil supply pipes 4.5. As is well known, this distribution valve 2 has a built-in bit piston and a main piston (not shown), and in the state shown in the figure, the grease discharged from the pump 1 reaches the distribution valve 2 through the main pipe 5, and first the pilot Operate the piston to listen to the oil path to the main piston, then push the main piston upwards in the diagram,
The amount of the stroke is pushed out to the discharge ports 2a and 2b. Note that 2e is an indicator rod that is engaged with the main piston, and refueling can be confirmed by visually observing the vertical movement of the indicator rod. Note that distribution valve 2 in Fig. 1
shows a single discharge type, that is, a type in which the main piston's reciprocating grease discharge is guided to one location (discharge 1: J2a, 2b), but the main piston's reciprocating grease discharge is guided to separate discharge ports. A double discharge type distribution valve may be used, or a single line distribution valve may be used as long as it has an indicator rod 2e.

Two switches A and B are arranged between the upper and lower stroke ends S1 and S2 of the indicator rod 2e, and in the state shown in FIG. kick, switch B is energized, but switch A (
1) CI-Rough is not kicked by the pointing stick 2e, so the switch A is set to 0 +: +:. For convenience of explanation, Fig. 1 shows the switch A1B attached only to the left-most indicator rod 2e, but it can also be attached to the right-most indicator rod, and furthermore, although not shown, it can be used for other instructions. It can also be attached to a pole.

In the discharge stroke in which the indicator rod 2e goes up, The time difference between the pointer rod 2e releasing the roller 7 and the release of the row 56 during the downward stroke of the pointer rod 2e, that is, the time from when switch A becomes OFF to when switch B becomes OFF. By detecting the time difference, it is possible to detect an abnormality in the greasing piping and an abnormality in the greasing portion. The moving time between two points of the pointer stick 2e (Row 56.7) is determined as follows, using the preset maximum and minimum times of '&' as a reference.

(1) A normal signal is output within the maximum and minimum range (middle range).

(2) If the maximum time is exceeded, an abnormal signal indicating that it is out of range is issued. At that time, the indicator stick 2e does not move or is in a state close to that. The cause is the greasing part is locked or there is high back pressure (blockage).
It becomes.

(3) Even if the minimum time is not reached, an out-of-range abnormality signal is output. At this time, there is a leak in the greasing pipe after the distribution valve.

FIG. 2 is a block diagram of the detection circuit. At the same time as the pump drive motor - starts rotating, a clock pulse is output, and as the indicator rod 2e rises as shown in Figure 1, the B switch ON, A switch OFF signal is input, and from there the clock pulse is output for time measurement. Counter C works. On the other hand, the signal from the time setting switch Tm that has set the maximum time enters several circuits, and C
When ≧Tm, an abnormality alarm is issued. That is, pipe clogging is detected. Further, the signal of the time setting switch Tn, which sets the minimum time, and C are compared in a matching circuit, and if C<Tn, an abnormality alarm is issued. In that case, there is a pipe leak.

FIG. 3 is a block diagram for detecting abnormalities in the greasing piping and the greasing part by measuring the time until the switch (2) is activated from the remoter's activation signal using one switch (2). In this case, the switch ■ is located at the center of the stroke of the indicator rod 2e, and after the motor starts operating, the switch
An abnormality is detected as in the case of FIG. 2 based on the time it takes for e to kick the roller 8 of switch (2). In other words, this corresponds to predictive operation, and although the accuracy is lower than in the case of FIG. 2, the apparatus can be made more compact. FIG. 4 is a block diagram corresponding to FIG. 3.

(Effects of the Invention) According to the present invention, an alarm can be issued when the movement time between two points of the indicator rod is outside the range of the maximum time and minimum time set in advance. If a problem (clogging) occurs, the indicator rod 2e will not move and the maximum time will be exceeded, which will cause an alarm to be issued.If a leak occurs in the greasing pipe after the distribution valve, the minimum time will not be reached and an alarm will be issued. I can get out 1. Therefore, it is possible not only to detect whether or not the distribution valve is discharging grease to the instep, but also to reliably detect abnormalities in the greasing piping and parts after the distribution valve, which has the advantage of greatly improving safety. .

Note that when carrying out the present invention, any one of a limit switch, a proximity switch, an optical sensor, a reed switch, etc. can be used as the detection sensor.

[Brief explanation of drawings]

1 and 3 are schematic structural diagrams of the device according to the present invention, and FIGS. 2 and 4 are block diagrams of the detection circuit. 2...Distribution valve, 2e...Indicator rod, A, 13...Switch (detection sensor) Agent Patent attorney Tadataka Oshiki'□゛''-・, Pa1\-
! ”-1 Figure 1

Claims (5)

[Claims] (1) A detection sensor is installed within the stroke range of the indicator rod that is locked to the piston of the distribution valve, and when the movement time of this indicator rod between two points is outside the preset maximum and minimum time range. A centralized lubrication/oil supply device characterized in that a control panel circuit is configured to issue an alarm. (2) The centralized lubrication/oil supply system according to claim 1, wherein the detection sensors 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 detection sensor is disposed at one point in the middle within the stroke range of the indicator rod. (4) The centralized lubrication/oil supply system according to claim 1, wherein the distribution valve is of a double line type or a single line type. (5) The centralized lubrication/oil supply system according to claim 1, wherein the detection sensor is any one of a limit switch, a proximity switch, an optical sensor, a reed switch, etc.