JPH0612768U - Viscous fluid supply pump - Google Patents

Abstract

(57) [Abstract] [Purpose] A viscous fluid supply pump capable of sucking and discharging a viscous fluid from a bellows type cartridge containing a viscous fluid, which has a simple structure and can prevent discharge failure. Is to provide. [Structure] A weight 100 mounted on the upper surface of the mounted cartridge 1 is provided, thereby canceling the restoring force of the compressed cartridge 1 in the rest period and further facilitating suction of viscous fluid by the pump. It is like this.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a viscous fluid that sucks a viscous fluid from a bellows type cartridge containing a viscous fluid such as grease and discharges it in small amounts at high pressure directly or indirectly to a lubrication point of an industrial machine or the like through a distribution valve or the like. It concerns a supply pump.

[0002]

[Prior art and its problems]

 When the viscous fluid supply pump operates and the viscous fluid in the bellows type cartridge decreases, the bellows of the cartridge shrinks. On the other hand, the operation of the pump is not generally continuous, but is intermittent, for example, operating for 10 minutes with a rest of 4 hours. By the way, since the bellows type cartridge is manufactured by resin molding, the expanded state filled with viscous fluid is the normal state, and when it shrinks, the force to restore it (restoring force) is always working. . Therefore, during the rest period, due to the restoring force of the cartridge, air is sucked from the outlet of the cartridge and enters the inside of the cartridge. There was a risk that a malfunction could occur.

The size of the screw forming the outlet of the cartridge is defined by JIS, but the effective screw length and shape are different depending on the manufacturer. For example, as shown in FIG. 7 and FIG. 8, even if the screw length h is the same, a screw having a collar 110 such as a stopper as shown in FIG. Some have an incomplete portion 120 formed by cutting off a part thereof. In any case, since it was a rough screw, we could not expect perfect airtightness and could not solve the above problems.

[0004]

[The purpose of the device]

 The present invention provides a viscous fluid supply pump capable of sucking and discharging a viscous fluid from a bellows type cartridge containing a viscous fluid, which has a simple structure and can prevent discharge failure. The purpose is to

[0005]

[Means for achieving the purpose]

 The present invention is a viscous fluid supply pump in which a bellows type cartridge containing a viscous fluid is mounted in an upright state, sucks and discharges the viscous fluid from the cartridge, and is mounted on the upper surface of the mounted cartridge. A weight and a cover that covers the mounted cartridge are provided, and one end of a long body exposed to the outside through a through hole formed in the cover is connected to the weight. Even if the weight is lowered to a height position where the inside of the cartridge is almost empty, it has a length such that it is exposed to the outside from the cover, and a stopper member larger than the through hole is provided on the exposed portion. It is characterized by being.

[0006]

[Action]

 The weight cancels the restoring force of the cartridge during the suspension period of the pump, and the pressing of the cartridge promotes the suction of the viscous fluid by the pump.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a viscous fluid supply pump of the present invention, and FIG. 2 is a partial sectional view taken along the line II of FIG. Reference numeral 1 is a bellows type cartridge, 2 is a reciprocating plunger pump, 2a is its discharge port, and 3 is a geared motor. The cartridge 1 is used by being mounted on the plunger pump 2 in an upright state, and the height direction thereof gradually shrinks as the grease contained therein decreases. The bellows-type cartridge 1 in FIGS. 1 and 2 is in a state in which the grease is fully stored. FIG. 3 is a front partial cross-sectional view showing a state in which the grease in the bellows-type cartridge 1 is substantially empty and the cartridge 1 is contracted.

A connection structure of the cartridge 1 and the cover 4 and the plunger pump 2 will be described with reference to FIG. 4, which is a partially enlarged view of FIG. The cover 4 is a cylinder whose top is closed. In the plunger pump 2, 21 is a suction port opened upward, and 22 is a reciprocating piston. When the piston 22 reciprocates, a suction force acts on the suction port 21. The suction port 21 communicates at its upper portion with the large-diameter recess 23. An internal thread 23a is formed on the inner surface of the recess 23.

Reference numeral 30 is a base for connecting the cartridge 1 and the cover 4 to the plunger pump 2. The base 30 includes a disc-shaped main body 31, a convex portion 32 on the lower surface of the main body 31, and a cylindrical flange 33 on the upper surface of the main body 31. Two stages of through holes 34 are formed in the center of the main body 31 and the convex portion 32, 34a is an upper large diameter hole and 34b is a lower small diameter hole. The diameter of the small diameter hole 34b is the same as the diameter of the suction port 21. A male screw 32 a is formed on the outer peripheral surface of the convex portion 32, the convex portion 32 is screwed into the concave portion 23, and the through hole 34 communicates with the suction port 21. 35 is an O-ring. The outer diameter of the flange 33 is equal to the inner diameter of the opening 41 of the cover 4, and the inner diameter is larger than the outer diameter of the cartridge 1. A curved portion 41a protruding inward is formed in the opening 41, while a concave portion 33a is formed on the outer peripheral surface of the flange 33. By fitting the curved portion 41a into the concave portion 33a, The cover 4 is fixed to the flange 33, that is, the base 30.

At the lower end of the cartridge 1, an outlet 11 for the grease contained therein is provided. The outlet 11 is a tubular body, and an external thread 11a is formed on the outer peripheral surface thereof. On the other hand, a female screw 134a is formed on the inner peripheral surface of the large diameter hole 34a, and the cartridge 1 is fixed to the mouthpiece 30 by screwing the outlet 11 into the large diameter hole 34a. Reference numeral 51 is a seal member. It should be noted that the screw fitting of the outlet 11 into the large diameter hole 34a becomes idle when it is tightened to a certain degree or more, so that the tip 11b of the outlet 11 cannot firmly contact the sealing member 51. Also, the surface of the tip 11b is not smooth. Therefore, the contact between the tip 11b and the seal member 51 is poor, and the airtightness between the outlet 11 of the cartridge 1 and the cap 30 cannot be sufficiently maintained.

As shown in FIG. 2, a disc-shaped weight 100 is placed on the upper surface of the cartridge 1. As shown in FIG. 5, an L-shaped metal fitting 101 is fixed to the center portion of the upper surface of the weight 100 by a bolt 102, and a small hole 101b is formed in the rising portion 101a. One end of a rope (long body) 82 having a predetermined length is connected to the hole 101b via a ring 81. The rope 82 goes out through the through hole 42 formed at the top of the cover 4 and hangs down. A ring (stop member) 83 serving as a weight is attached to the other end of the rope 82. The ring 83 is larger than the through hole 42. As shown in FIG. 3, the rope 82 has such a length that the ring 83 is outside the cover 4 even when the grease in the cartridge 1 becomes almost empty and the cartridge 1 contracts and the weight 100 reaches the lower limit position. Is set to. Further, the weight of the weight 100 is set so as to overcome the restoring force of the contracted cartridge 1 and to press the cartridge 1 to promote the grease to be sucked into the plunger pump 2. . The weight is determined by taking the viscosity of grease into consideration.

Next, the operation will be described. As shown in FIG. 1 and FIG. 2, when the cartridge 1 filled with grease is mounted on the plunger pump 2 in a standing state and the geared motor 3 is further operated with the cover 4 attached, the piston 1 22 reciprocates, and the grease in the cartridge 1 is discharged from the discharge port 2a of the plunger pump 2 through the outlet 11 and the suction port 21. As the grease in the cartridge 1 decreases, the height of the cartridge 1 gradually shrinks, and when the grease becomes almost empty, the cartridge 1 shrinks to the lower limit state shown in FIG. As the cartridge 1 contracts, the height position of the weight 100 naturally lowers. The rope 82 is pulled into the cover 4 as the weight 100 is lowered. The ring 83 moves upward, but it is outside the cover 4 even when the weight 100 reaches the lower limit position in FIG.

As described above, in the viscous fluid supply pump configured as described above, the restoring force of the contracted cartridge 1 is canceled by the weight 100. Therefore, the cartridge 1 does not try to return to its original state during the rest period of the pump, and therefore air is sucked into the cartridge 1 between the tip 11b of the outlet 11 and the seal member 51 and the male screw 11a. You won't get lost. Therefore, the plunger pump 2 does not inhale the air from the cartridge 1 to make it impossible to discharge the air, the idling does not occur, and the bearing or the like does not seize.

Further, since the weight 100 promotes the pressing of the cartridge 1 and the suction of the grease into the plunger pump 2, the operating efficiency of the plunger pump 2 is improved.

Further, by visually observing a change in the length of the rope 82 exposed to the outside from the cover 4, it is possible to estimate how much the grease in the cartridge 1 is reduced.

The cartridge 1 in which the grease is almost empty is replaced with the cartridge 1 in which the grease is full as follows. That is, in the state of FIG. 3, first, the cover 4 is moved to the left and right to release the fitting between the curved portion 41a and the concave portion 33a, and the cover 4 is removed from the flange 33 of the base 30. Next, the cover 4 is separated from the cartridge 1 together with the weight 100 suspended from the rope 82. Next, the cartridge 1 is unscrewed from the outlet 11 and the large diameter hole 34a by rotating the cartridge 1 and removed from the mouthpiece 30, that is, the plunger pump 2. Next, by rotating the cartridge 1 filled with grease, the outlet 11 and the large-diameter hole 34a are screw-fitted, and the cartridge 30 is attached to the plunger pump 2. Then, while the weight 100 is positioned above the cover 4 by pulling the rope 82 by holding the ring 83, the cover 4 is moved together with the weight 100 onto the cartridge 1 to move the weight 100 to the upper surface of the cartridge 1. The cover 4 is lowered while being mounted on the cover 4, and the cover 4 is moved to the left and right to fit the curved portion 41a and the concave portion 33a to each other and attach the cover 4 to the flange 33 of the base 30. This completes the replacement work.

In the above replacement work, when the cover 4 is moved together with the weight 100, the ring 83 is larger than the through hole 42, so that the entire rope 82 does not enter the cover 4. Therefore, the weight 100 is moved together with the cover 4 while being accommodated in the cover 4. Therefore, when the cover 4 is attached after replacing the cartridge 1, the weight 100 is easily placed on the upper surface of the cartridge 1.

[0018]

[Another embodiment]

 Instead of the rope 82, a chain or the like may be used as long as it is an elongated flexible member. Further, if there is a space above, a rod body 92 as shown in FIG. 6 may be installed upright. Of course, a spherical body (stop member) 93 is provided on the upper end of the rod body 92.

Further, the base 30 may be formed integrally with the plunger pump 2.

Further, the present invention is not limited to the automatic pump as in the above embodiment, but can be applied to a manual pump.

[0021]

[Effect of device]

 As described above, the viscous fluid supply pump of the present invention has the following effects. (1) The weight 100 can cancel the restoring force of the compressed cartridge 1. Therefore, it is possible to prevent air from being sucked into the cartridge 1 between the tip 11b of the outlet 11 and the seal member 51 and through the male screw 11a during the suspension period of the pump. Therefore, it is possible to prevent the plunger pump 2 from sucking air and being unable to discharge air, and also to prevent idle operation and prevent seizure of the bearing or the like. (2) The weight 100 can help the cartridge 1 to be pressed and the grease to be sucked into the plunger pump 2. Therefore, the operating efficiency of the plunger pump 2 can be improved. Further, it is not necessary to employ expensive pressing means such as spring type or pneumatic type. (3) By changing the weight of the weight 100 variously, it is possible to deal with cartridges containing various viscous fluids having different viscosities. (4) By visually observing the change in the length of the rope 82 exposed to the outside from the cover 4, it is possible to have an idea as to how much the grease in the cartridge 1 is reduced. (5) Since the ring 83 is larger than the through hole 42, the entire rope 82 does not enter the cover 4. Therefore, the weight 100 can be moved together with the cover 4 while being accommodated in the cover 4. Therefore, when the cover 4 is attached after the cartridge 1 is replaced, the weight 100 can be easily placed on the upper surface of the cartridge 1. Can be placed.

[Brief description of drawings]

FIG. 1 is a front view showing a viscous fluid supply pump of the present invention.

FIG. 2 is a partial cross-sectional view taken along the arrow II in FIG.

FIG. 3 is a front partial cross-sectional view showing one operating state of the viscous fluid supply pump of the present invention.

FIG. 4 is a partially enlarged sectional view of FIG.

FIG. 5 is an enlarged perspective view of a weight.

FIG. 6 is a front view showing another example of the viscous fluid supply pump of the present invention.

FIG. 7 is a view showing a conventional example of an outlet of a bellows type cartridge.

FIG. 8 is a view showing another conventional example of the outlet of the bellows type cartridge.

[Explanation of symbols]

 1 Bellows Type Cartridge 2 Plunger Pump 4 Cover 42 Through Hole 82 Rope (Long Body) 83 Ring 92 Rod (Long Body) 93 Sphere 100 Weight

Claims (1)

[Scope of utility model registration request] 1. A viscous fluid supply pump for mounting a bellows type cartridge containing a viscous fluid in an upright state and sucking and discharging the viscous fluid from the cartridge, which is mounted on an upper surface of the mounted cartridge. A weight and a cover for covering the mounted cartridge, and one end of a long body exposed to the outside through a through hole formed in the cover is connected to the weight. Even if the weight is lowered to a height position where the inside of the cartridge is almost empty, it has a length such that it is exposed to the outside from the cover, and a stopper member larger than the through hole is provided in the exposed portion. A viscous fluid supply pump characterized by being provided.