JPH09264251A - Damper adaptor for vertical pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb vibration at the time of pump operation, and reduce vibration of an upper cup for a drum can by arranging a spring member for energizing a pump upward on the spring installing part of an adaptor main body in a device formed in such a constitution that a vertical pump is arranged on the mouthpiece of the upper cap of the drum can through a damping adaptor. SOLUTION: In a device formed in such a constitution that a vertical pump 1 is mounted on the mouthpiece 2b of the upper cap 2a of a drum can 2 through an adaptor 3.1, and oil in the drum can 2 is pumped, the adaptor 3.1 is provided with an adaptor main body 4.1 installed by screwing a taper female screw part 4a formed on the outer peripheral surface of a lower end part around the taper male screw part of the mouthpiece 2b, and a coil spring 5 is housed in a spot facing part 4b arranged on the upper end of the adaptor main body 4.1 by projecting the upper part of the coil spring 5 from the adaptor main body 4.1. The pump 1 is fit to an intake tube 13 connected to the lower end of the pump main body 11 till a position where the step part 11e of the pump main body 11 lower end abuts on the spring 5, and thereby, vibration in association with vertical motion of the pump 1 is absorbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffer adapter which is mounted between a vertical pump and a cap of a drum can when the vertical pump is inserted into the cap of a drum can to pump out a fluid such as oil. Regarding

[0002]

2. Description of the Related Art Conventionally, for example, when removing oil from a drum can containing oil such as engine oil, a cylindrical adapter metal fitting (so-called a bung adapter) is screwed and fixed to a mouthpiece of an upper lid of the drum can with a taper screw.
Insert the vertical pump through the central hole of this adapter,
The plunger inside the pump moved up and down reciprocally by switching the air pressure to pump out the oil in the drum.
In this case, the adapter metal fitting is provided with one axial slit at a predetermined angular position in the circumferential direction, and the inner diameter of the adapter is reduced by the effect of the slit when the taper screw is screwed onto the base. The pump was clamped and fixed by the inner diameter of the adapter.

[0003]

However, the above-mentioned conventional techniques have the following drawbacks.

(1) Since the pump is simply fixedly attached to the base through the adapter, the vibration caused by the vertical movement of the plunger is transmitted to the upper lid of the drum and the upper lid vibrates vertically. As a result, fatigue cracking occurs with repeated use, and the number of times the drum is recycled is reduced.

(2) Noise is generated due to the above vibration and resonates with the drum to generate a large amount of noise.

(3) The air switching valve itself contained in the pump is also affected by the vibration, and there is a risk that the durability and reliability are impaired.

(4) Since the pump is firmly tightened and fixed to the adapter fitting by the effect of the slit, the pump cannot rotate after being attached to the adapter,
After the pump was installed, it was difficult to adjust the consistency with the air and oil pipes connected to the pump, which was inconvenient.

The present invention solves the above-mentioned drawbacks of the prior art. It absorbs vertical vibrations during operation of a vertical pump to reduce the vibrations of the upper lid of the drum can.
Prevents fatigue cracking of drum cans and reduction of the number of times of recycling, reduces noise caused by vibration of the pump and drum cans, ensures durability and reliability of the pump, and further, air and oil piping even after the pump is installed. It is intended to provide a buffer adapter for mounting a pump capable of easily adjusting the compatibility with peripheral equipment such as.

[0009]

In order to solve the above-mentioned problems of the prior art, in the vertical pump mounting buffer adapter of the present invention, firstly, the central hole (4C) and at least one spring mounting portion ( 4b, 4d), which is attached and fixed to the fluid outlet (2b) of the container (2) for containing the fluid, and the pump (1) is inserted into the central hole (4c). 4.1, 4.2) and a spring member (5) attached to the spring attachment portions (4b, 4d) of the adapter body (4) for urging the pump (1) at least above the container. It is characterized by including.

The buffer adapter for mounting the vertical pump according to the present invention is, secondly, the central hole (4c) and the outer and inner ones.
It has a pair of spring attachment parts (4b, 4d) and is fixedly attached to a fluid outlet (2b) of a container (2) for containing a fluid, and the pump (1) of the central hole (4c) is inserted therethrough. Attached to the adapter body (4.2) and a pair of spring attachment portions (4b, 4d) of the adapter body (4.2) respectively, and the pump (1) is attached above and below the container, respectively. And a pair of biasing spring members (5, 6).

In the vertical pump mounting buffer adapter having the above-mentioned second characteristic, the spring stopper member (8) is fixed to a predetermined position of the pump (1), and one spring member (6) is It may be interposed between the inner spring mounting portion (4d) and the spring stopper member (8).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which the vertical pump mounting buffer adapter 3 of the present invention is used. The pump 1 is inserted through the adapter 3 into the mouthpiece 2b of the upper lid 2a of the drum can 2 and mounted. An air pressure reducing valve 73, an air pressure gauge 74, and an air opening / closing valve 75 are arranged in an air supply pipe 72 connecting the air inlet 11a provided in the pump body 11 of the vertical pump 1 and the air source 71. An oil outlet 11c is connected to the oil discharge pipe 76, and the oil pumped up from the drum pipe 2 by the pump 1 is discharged from the oil discharge pipe 76.

As shown in FIGS. 2 and 3, the pump mounting buffer adapter 3.1 of the first embodiment of the present invention comprises a cylindrical adapter body 4.1 and a coil spring 5.
A taper male screw portion 4a is formed on the outer peripheral surface of the lower end portion of the adapter body 4.1, whereby the adapter male body 4.1 is screwed into the taper female screw portion of the mouthpiece 2b of the drum can 2. While being inserted. Further, the coil spring 5 is housed in the counterbore 4b provided at the upper end of the adapter body 4.1 with its upper part projecting above the body 4.1 by a predetermined amount.

In FIG. 2 and FIG. 5, 13 is an oil suction tube inserted and connected to the lower end of the hoop body 11. The vertical pump 1 has a structure in which the suction tube 13 is located in the pump body 1 with respect to the central hole 4c of the adapter body 4.1.
The stepped portion 11e at the lower end of 1 is fitted and inserted to a position where it contacts the spring 5. In this fitted state, the pump 1
Is movable up and down to some extent and rotatable with respect to the adapter body 4.1.

During operation of the pump 1, when the plunger 14 (see FIG. 5) moves up and down to generate vibrations and the pump 1 itself moves up and down with respect to the drum can 2, the spring 5 of the adapter 3.1 is moved. Repeatedly compresses and expands to absorb the vibration accompanying the vertical movement of the pump 1 and reduce the noise accompanying the vibration.

Next, FIG. 4 shows an adapter 3.2 of the second embodiment of the present invention. In FIG. 4, the same parts as those in FIG. In the figure, the adapter body 4.2 of the adapter 3.2 has a counterbore portion 4d at its lower end as compared with the adapter body 4.1 of FIG. 2, and a spring is formed in the counterbore portion 4d. Holds 6. At this time, the lower end of the spring 6 is fixed to the suction tube 13 by a sunk screw 7
Is limited by

According to the adapter 3.2 shown in FIG. 4, the vertical vibration generated during the operation of the pump is suppressed by the pair of springs 5 and 6.
However, it absorbs from both upper and lower directions. Therefore, the vibration can be absorbed more efficiently than in the embodiment of FIG.

Next, the structure and operation of the pump 1 will be described with reference to FIG.

The pump 1 includes an air cylinder 12 and an oil suction tube 1 at an upper portion and a lower portion of a pump body 11, respectively.
3 are fitted and attached, and the plunger 14 is arranged inside thereof. An air switching valve unit 15 is connected to an upper portion of the plunger 14, and a movable suction valve unit 17 is connected to a lower portion of the plunger 14 via a connecting rod 16. A shock absorber unit 18 is provided at the upper end of the air cylinder 12, and a fixed intake valve unit 19 is provided at the lower end of the intake tube 13.
Is provided. Note that FIG. 5 shows the middle of the downward movement of the entire stroke m (see FIG. 5) of the plunger 14.

The switching valve unit 15 is, as shown in FIG.
An air switching valve body 32 is inserted into an axial center hole 31a of the air switching valve housing 31 so as to be capable of relative vertical movement (that is, in the axial direction), and a pair of holes 31c of a disk portion 31b of the housing 31 are respectively inserted. A cylindrical valve seat 36 (having a passage 36a) is inserted. When inserting the valve body 32 into the central hole 31a, the valve plate 33 preliminarily inserted and positioned through the rectangular through-hole 31d having a cross section provided in the direction orthogonal to the axial direction of the valve body 32 is inserted into the valve body 32. On the other hand, it is attached by a snap ring 34. The switching valve housing 31 is fixed to the upper end of the plunger 14 by a male screw portion 31e, the valve body portion 32a faces the valve seat 35, and a valve chamber 39 is formed. Is installed. The spring 40 is housed in the spot facing portion 11b at the upper end of the pump body 11.
Further, chambers 41 and 42 are formed below and above the disc portion 31b, respectively.

In FIG. 5, the shock absorber unit 18 comprises a vertically movable spring cap 45 and a spring 46 in a housing 44 arranged in the upper end cap 43 of the air cylinder 12.

In the movable suction valve unit 17, a cylindrical piston body 55 is screwed and fixed to the lower end of a valve housing 54 connected to the connecting rod 16 with a bowl-shaped packing 56 interposed therebetween, and is further axially movable inside the housing. Valve plate 5
7 will be placed.

The fixed suction valve unit 19 is the suction tube 1
A valve plate 60, which is movable in the axial direction, is arranged on a bottom adapter 58 attached to the lower end of 3 via a bolt 59. Further, valve chambers 61 and 62 are formed above and below the movable suction valve unit 17, respectively.

Next, regarding the operation of the pump 1, the air entering from the air inlet 11a reaches the chamber 42 through the chamber 41, the space 47 between the disc portion 31b and the valve plate 33, and the passage 36a to reach a high pressure. Then, the plunger 14 is pressed downward through the air switching valve unit 15 and slid at a predetermined speed. At this time, in the air switching valve body 32, the pressure received from the chamber 42 side through the central passage 32b to the valve body portion 32a is larger than the pressure received from the center passage 14a side of the plunger 14 to the valve body portion 32a ( Since the differential pressure is P.1), the valve body portion 32a slides downward relative to the housing 31 and is seated on the valve seat 35, and between the valve plate 33 and the cylindrical valve seat 36. Stroke n of the valve plate 33 (Fig. 6
The space 47 for the reference) is secured.

At this time, since the movable suction valve unit 17 is also sliding downward, the pressure of the oil in the chamber 62 is increased. Therefore, the movable valve plate 6 of the fixed intake valve unit 19 is
No. 0 is seated on the bottom adapter 58 to close the oil passage 58b, and the valve plate 57 of the movable suction valve unit 17 moves upward relative to the housing 54 to move the oil passage 57b.
Since a is opened, the oil in the chamber 62 moves to the chamber 61 through the passage 57a.

When the unit 17 approaches the lower limit position 18.1 (see FIG. 5), the valve plate 33 of the unit 15 comes into contact with the spring 40 to start compressing it, and the lower limit position 1 of the unit 17 is reached.
In 8.1, the force of the spring 40 causes the differential pressure P.P. 1, the valve element 32 slides upward relative to the housing 31 by the stroke n, and the valve plate 33 moves toward the valve seat 3
6, the space 47 disappears and the passage 36a is closed, and the valve body portion 32a also moves upward by the dimension n to separate from the valve seat 35 and open this portion.

Therefore, since the chamber 41 becomes a closed space, the pressure in the chamber 41 starts to rise due to the air from the inlet 11a and becomes larger than the pressure in the chamber 42. Therefore, the plunger 14 stops moving downward and then starts sliding upward due to the differential pressure (P.2) between the chamber 41 and the chamber 42. At this time, the air in the chamber 42 passes through the passage 32b and the valve body 32.
It reaches the chamber 52 through the valve opening portion of a and the passages 14a and 14b, and is discharged into the atmosphere from the air outlet 11d. Further, by sliding the plunger 14 upward, the unit 17
Valve plate 57 moves downward to close the passage 57a, and the chamber 62
Becomes negative pressure, the valve plate 60 of the unit 19 moves upward to open the passage 58b, so that the oil in the drum can 2 passes through the passage 5b.
It is sucked into the chamber 62 through 8b.

When the unit 17 approaches the upper limit position 18.2 (see FIG. 5), the valve body 32 causes the cap 4 of the unit 18 to move.
5 to start compression of the spring 46, followed by the unit 1
7, the force of the spring 46 causes the differential pressure P.P. Since the valve body 32 slides downward by a stroke n relative to the unit 15, the valve plate 33 is separated from the valve seat 36 to restore the space 47 to open the passage 36a. The valve body portion 32a also moves downward by a dimension m and is seated on the valve seat 35 to close the valve.

As a result, the oil in the chamber 61 is discharged from the oil outlet 11c during the upward movement of the plunger 14 by the stroke m, and the discharge amount is a × m (where a is the suction amount). Effective area of the tube 13).

Subsequently, the air from the air inlet 11a again flows into the closed chamber 42 through the chamber 41, the space 47 and the passage 36a to increase the pressure in the chamber 42, so that the plunger 14 starts to slide downward. So the valve plate 5 of unit 17
7 moves upward to open the passage 57a, and at the same time, the unit 19
Valve plate 60 moves downward to open the passage 58b. continue,
The plunger 14 returns to the position shown in FIG. 5, and the above operation is repeated thereafter.

In the above embodiments, the case where oil is sucked from the inside of the drum can has been described, but the container for storing the contents is not limited to the drum can and various cans may be used.
Further, the oil in the can may be various oils such as gasoline, kerosene, light oil or lubricating oil, food oil, and is not limited to oil, but liquid paint, liquid adhesive, cosmetic liquid, newspaper printing ink, It may be mirin for food, or may be a viscous fluid such as food jam or cosmetic cream instead of so-called liquid.

[0033]

EXAMPLE A buffer adapter for mounting a pump according to the present invention and a conventional cylindrical adapter fitting (so-called bung adapter).
Was used to perform a comparative test of noise generation during operation of the pump.

The pump used was a vertical pump, the air pressure during operation was 7 kgf / cm ² , and this was set as the discharge opening,
The stroke number was 232 st / min. Also, the used drum can has a maximum capacity of 200 liters, ATF,
It was filled with waste oil such as engine oil, and the oil temperature was 14.9 ° C.

Further, as the pump mounting buffer adapter according to the present invention, FIGS. 2 and 3 in the above-described embodiment are used.
Using a structure similar to that shown in, noise measurement was performed at a position 1 m from the sound source.

As a result, when the buffer adapter of the present invention is used, the noise at the time of starting the pump is 70 dB, and after that, the oil in the drum can is almost completely sucked up and becomes 70 dB until the air is sucked into the drum. It didn't change,
It became 82 dB when it entered the idling state. According to visual inspection by the tester, the amplitude of the pump when the adapter of the present invention was used was 10 to 20 mm when the pump was started and 50 to 80 mm when the air was sucked.

On the other hand, when the conventional bung adapter is used, the noise at the time of starting the pump is 74 dB, and thereafter the noise gradually increases as the oil in the drum can decreases, and immediately before the air suction (idle operation state). Became 78 dB, and rose to 84 dB when air was sucked in (idle operation).

[0038]

【The invention's effect】

(1) According to the present invention, since the vibration caused by the vertical movement of the plunger is absorbed and damped by the spring member of the pump mounting buffer adapter, the vibration of the drum can can be suppressed, the risk of fatigue cracking can be reduced, and the cycle of the drum can be used. The number can be increased.

(2) Further, since the above-mentioned vibration can be suppressed, noise can be greatly reduced.

(3) Further, the air switching valve itself incorporated in the pump is not affected by the vibration, and the durability and reliability of the pump itself can be improved.

(4) Further, since the pump is simply fitted to the buffer adapter, the pump can be rotated even after being attached to the buffer adapter, and air and oil pipes connected to the pump, etc. It is easy to adjust the consistency with and improve workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a pump mounting buffer adapter of the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a pump mounting buffer adapter of the present invention.

3 is a perspective view showing the buffer adapter for mounting the pump of FIG. 2. FIG.

FIG. 4 is a cross-sectional view showing another embodiment of the pump mounting buffer adapter of the present invention.

FIG. 5 is a sectional view of the pump in a state where the pump mounting buffer adapter of the present invention is mounted on the pump.

6 is an enlarged cross-sectional view of a main part of the pump of FIG.

[Explanation of symbols]

 1 Pump 2 Drum can 3 (3.1, 3.2) Buffer adapter for pump mounting 4 (4.1, 4.2) Adapter body 4a Tapered male screw part 4b, 4d Counterbore part 4c Center hole 5, 6 Spring 7 Sink Screw 8 Fixing sleeve 11 Pump body 13 Suction tube 14 Plunger

Claims (3)

[Claims] 1. A central hole (4C) and at least one spring attachment portion (4b, 4d), which is attached and fixed to a fluid outlet (2b) of a container (2) for containing a fluid,
An adapter body (4; 4.1, 4.2) into which the vertical pump (1) is inserted in the central hole (4c), and spring mounting portions (4b, 4d) of the adapter body (4).
And a spring member (5) for urging the pump (1) at least upwardly of the container, the buffer adapter for mounting a vertical pump. 2. A fluid outlet (2b) of a container (2) containing a fluid, which has a central hole (4c) and a pair of outer and inner spring mounting portions (4b, 4d). An adapter body (4.2) which is fixedly attached to the center hole (4c) and into which the pump (1) is inserted, and a pair of spring attachment portions (4) of the adapter body (4.2).
b, 4d) respectively, and a pair of spring members (5, 5) for urging the pump (1) upward and downward of the container, respectively.
6) A buffer adapter for mounting a vertical pump, comprising: 3. The buffer adapter for mounting a vertical pump according to claim 2, wherein a spring stopper member (8) is provided at a predetermined position of the pump (1).
Is fixed, and one of the spring members (6) is provided with the inner spring mounting portion (4d) and the spring stopper member (8).
A buffer adapter for mounting a vertical pump, characterized in that it is interposed between and.