JP2021080905A - Leaking liquid guide device, pump, and method for attaching leaking liquid guide device - Google Patents

Abstract

To provide a leaking liquid guide device which can guide a liquid leaking along an outer peripheral surface of a gland packing to a proper area such as a drain hole.SOLUTION: A leaking liquid guide device 20 is fixed to an outer peripheral surface 22a of a packing housing 22 in which a gland packing 14 of a pump casing 3 is housed. The leaking liquid guide device 20 includes a guide member 40 having an inner peripheral surface having a shape along the outer peripheral surface 22a of the packing housing 22. A liquid leaking along an outer peripheral surface of the gland packing 14 is dammed by the guide member 40 and dropped from the guide member 40 to a drain hole 33 or an area near the drain hole 33.SELECTED DRAWING: Figure 4

Description

The present invention relates to a liquid leakage guide device for blocking the flow of liquid leaking along the outer periphery of the gland packing of a pump and guiding the liquid to a drain hole. The present invention also relates to a pump provided with such a leak guide device. Furthermore, the present invention relates to a method of attaching a leak guide device to a pump.

As an example of a pump, there is a type of pump that boosts liquid by rotating an impeller fixed to a rotating shaft. The impeller is housed in the pump casing and the liquid is boosted in the pump casing. A gland packing as a shaft sealing device is held in the pump casing in order to prevent liquid from leaking from the gap between the pump casing and the rotating shaft.

FIG. 27 is a cross-sectional view showing a conventional structure in which the gland packing is held in the pump casing. The gland packing 200 has a cylindrical shape as a whole. The gland packing 200 is housed in a cylindrical packing housing 205 of the pump casing 203. The inner peripheral surface of the gland packing 200 is in contact with the outer peripheral surface of the rotating shaft 206, and the outer peripheral surface of the gland packing 200 is in contact with the inner peripheral surface of the packing housing 205. The packing retainer 207 is in contact with the outer end surface of the gland packing 200 and is connected to the pump casing 203 by a bolt 209.

When the bolt 209 is tightened, the packing retainer 207 pushes the gland packing 200 toward the inside of the pump casing 203 along the rotation shaft 206, and as a result, the gland packing 200 is deformed inward in the radial direction thereof. The deformation of the gland packing 200 changes the contact pressure of the gland packing 200 with respect to the rotating shaft 206. Therefore, the contact pressure of the gland packing 200 with respect to the rotating shaft 206 can be adjusted by tightening the bolt 209.

During the operation of the pump, the outer peripheral surface of the rotating shaft 206 is in sliding contact with the inner peripheral surface of the gland packing 200. If the contact pressure of the gland packing 200 with respect to the rotating shaft 206 is too low, the liquid in the pump casing 203 will leak. On the other hand, if the contact pressure is too high, there is almost no liquid flow between the outer peripheral surface of the rotating shaft 206 and the inner peripheral surface of the gland packing 200, and the gland packing 200 may be seized. From this point of view, the tightening of the bolt 209 is adjusted so that a certain flow rate of liquid is allowed to leak along the inner peripheral surface of the gland packing 200.

The liquid leaked along the inner peripheral surface of the gland packing 200 flows on the packing retainer 207 and falls downward from the packing retainer 207 as shown by the solid arrow in FIG. 27. A drain hole 210 is provided below the packing retainer 207. The drain hole 210 is formed at the bottom of the bearing housing 212 connected to the pump casing 203. The liquid that has fallen from the packing retainer 207 is received by the bottom of the bearing housing 212 and flows out of the pump through the drain hole 210. Thus, some liquid leakage is allowed to prevent seizure of the gland packing 200.

Jikkai Sho 57-168799 Jikkenhei 2-87998 Gazette

On the other hand, leakage of liquid along the outer peripheral surface of the gland packing 200 should not be allowed from the viewpoint of preventing deterioration of pump performance. When the bolt 209 is tightened, the outer peripheral surface of the gland packing 200 is strongly pressed against the inner peripheral surface of the packing housing 205, so that there is a substantial gap between the outer peripheral surface of the gland packing 200 and the inner peripheral surface of the packing housing 205. Is not formed in. However, since the gland packing 200 is made of a fibrous material, it is not possible to completely prevent the liquid from leaking along the outer peripheral surface of the gland packing 200.

As shown by the dotted arrow in FIG. 27, the liquid leaked along the outer peripheral surface of the gland packing 200 flows along the lower part of the outer peripheral surface of the packing housing 205 and reaches the bottom of the pump casing 203. The liquid further reaches the joint surface 215 between the pump casing 203 and the bearing housing 212, and leaks out of the pump through a minute gap between the joint surfaces 215. The leaked liquid may corrode the legs of the pump and the floor.

Therefore, the present invention provides a liquid leakage guide device capable of guiding the liquid leaked along the outer peripheral surface of the gland packing to an appropriate place such as a drain hole. The present invention also provides a pump equipped with such a leak guide device. Furthermore, the present invention provides a method of attaching a leak guide device to a pump.

In one aspect, it is a liquid leakage guide device for guiding the liquid leaked along the outer peripheral surface of the gland packing, and has an inner peripheral surface having a shape along the outer peripheral surface of the packing housing in which the gland packing is housed. A liquid leakage guide device including a guide member is provided.

In one aspect, the guide member has a notch at its top.
In one aspect, a part of the guide member is divided, and the liquid leakage guide device further includes a fastening mechanism for fastening the divided ends of the guide member to each other.
In one aspect, the guide member comprises an outer ring and an inner ring arranged on the inner peripheral surface of the outer ring, and the fastening mechanism is configured to fasten the divided ends of the outer ring to each other. , The inner ring is made of an elastic material.
In one aspect, the guide member is divided into a plurality of divided bodies, and the liquid leakage guide device further includes a plurality of fastening mechanisms for fastening the plurality of divided bodies to each other.
In one aspect, the guide member includes an outer ring and an inner ring arranged on the inner peripheral surface of the outer ring, the outer ring is divided into a plurality of divided bodies, and at least a part of the inner ring is divided. The liquid leakage guide device further includes a plurality of fastening mechanisms for fastening the plurality of divided bodies to each other, and the inner ring is made of an elastic material.
In one aspect, the liquid leakage guide device further includes a liquid receiving member fixed to the lower end of the guide member.
In one aspect, the liquid receiving member is tilted with respect to the central axis of the guide member.
In one aspect, the liquid receiving member has a liquid flow path on its upper surface.

In one aspect, a pump casing, an impeller arranged in the pump casing, a rotating shaft to which the impeller is fixed, a gland packing for sealing a gap between the rotating shaft and the pump casing, and the like. The pump casing includes a bearing housing that holds a bearing that rotatably supports the rotating shaft and the liquid leakage guide device, and the pump casing has a cylindrical packing housing in which the gland packing is housed, and the liquid leakage. The guide device is fixed to the outer peripheral surface of the packing housing, the bearing housing has a drain hole at the bottom thereof, and the lowermost end of the liquid leakage guide device is the pump casing and the bearing housing. A pump is provided that is located farther from the pump casing than the joint surface of the pump.

In one aspect, a liquid leakage guide device for guiding the leaked liquid along the outer peripheral surface of the gland packing of the pump is attached, and the liquid leakage guide device is the outer circumference of the packing housing in which the gland packing is housed. A method comprising a guide member having an inner peripheral surface that can follow the surface, including an attachment step of attaching the guide member to the outer peripheral surface of the packing housing and an adjustment step of adjusting the attachment position of the guide member. Provided.

The guide member has a notch, and the adjustment step is a step of adjusting the position of the notch so that the notch is arranged at a position different from the lowermost portion of the gland packing.
A part of the guide member is divided, and the liquid leakage guide device further includes a fastening mechanism for fastening the divided ends of the guide members to each other, and the adjusting step is performed by the fastening mechanism. This is a step of adjusting the position of the fastening mechanism so that the fastening mechanism is arranged at a position different from the lowermost portion of the gland packing.

The liquid leaked along the outer peripheral surface of the gland packing flows along the outer peripheral surface of the packing housing, and the flow direction is changed by the guide member of the liquid leakage guide device. That is, since the liquid cannot get over the guide member, it is temporarily blocked by the guide member, and then the liquid flows downward from the guide member. The liquid is guided to a suitable location, such as a drain hole, and as a result, the guide member can prevent the liquid from reaching the pump casing.

It is sectional drawing which shows one Embodiment of a pump. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 3A is a view of the liquid leakage guide device viewed from the axial direction of the rotation axis, and FIG. 3B is a sectional view taken along line BB of FIG. 3B. FIG. 5 is an enlarged cross-sectional view showing a part of the pump shown in FIG. 5 (a) and 5 (b) are views showing an example of a guide member having a notch at the top. FIG. 6A is a diagram showing another embodiment of the liquid leakage guide device, and FIG. 6B is a sectional view taken along line CC shown in FIG. 6A. It is a figure which shows still another embodiment of the liquid leakage guide apparatus. It is a perspective view which shows the liquid leakage guide device with bolts and nuts removed. 9 (a) and 9 (b) are diagrams showing an embodiment in which a snap lock is used as a fastening mechanism. It is a figure which shows still another embodiment of the liquid leakage guide apparatus. It is a figure which shows still another embodiment of the liquid leakage guide apparatus. It is a figure which shows still another embodiment of the liquid leakage guide apparatus. It is a perspective view which shows the still other embodiment of the liquid leakage guide apparatus. It is a side view of the liquid leakage guide device shown in FIG. It is a modification of the liquid leakage guide device shown in FIG. It is a figure which shows an example which incorporated the liquid leakage guide device shown in FIG. 13 and FIG. 14 into the pump shown in FIG. It is a perspective view which shows the still other embodiment of the liquid leakage guide apparatus. It is a side view of the liquid leakage guide device shown in FIG. FIG. 8 is a cross-sectional view taken along the line DD of FIG. It is a figure which shows the state which the leakage guide device is divided. It is a figure which shows the state which the liquid leakage guide device shown in FIG. 17 is attached to the outer peripheral surface of a packing housing. It is a figure which shows an example of the liquid leakage guide apparatus provided with the block body which has a guide flow path on the upper surface. It is a figure which shows another example of the liquid leakage guide apparatus provided with the block body which has a guide flow path on the upper surface. It is a perspective view which shows the still other embodiment of the liquid leakage guide apparatus. It is a flowchart explaining the method of attaching a liquid leakage guide device to a packing housing. It is sectional drawing which shows one Embodiment of both suction type pumps. FIG. 5 is a cross-sectional view showing a conventional structure in which a gland packing is held in a pump casing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a pump. The pump shown in FIG. 1 is a single suction type pump equipped with an impeller having one liquid inlet. The pump includes a pump casing 3 having a liquid suction port 3a and a liquid discharge port 3b, an impeller 7 arranged in the pump casing 3, and a rotating shaft 8 to which the impeller 7 is fixed. The pump casing 3 has an impeller casing 3A on which a volute chamber 3c is formed and a casing cover 3B that closes the opening of the impeller casing 3A. The impeller 7 is arranged in the volute chamber 3c.

The impeller 7 is fixed to one end of the rotating shaft 8. The other end of the rotating shaft 8 is connected to a drive shaft of an electric motor (not shown) via a shaft joint. The impeller 7 is a centrifugal impeller. The suction port 3a and the discharge port 3b communicate with the volute chamber 3c. Legs 10 are fixed to the lower part of the pump casing 3.

The pump is provided along the gland packing 14 that seals the gap between the rotating shaft 8 and the pump casing 3, the bearing housing 17 that holds the bearing 15 that rotatably supports the rotating shaft 8, and the outer peripheral surface of the gland packing 14. A liquid leakage guide device 20 for guiding the leaked liquid is further provided. The gland packing 14 is housed in the packing housing 22 of the casing cover 3B constituting the pump casing 3. The packing housing 22 has a cylindrical shape. Similarly, the entire gland packing 14 has a cylindrical shape. The inner peripheral surface of the gland packing 14 is in contact with the outer peripheral surface of the rotating shaft 8, and the outer peripheral surface of the gland packing 14 is in contact with the inner peripheral surface of the packing housing 22.

The pump further includes a packing retainer 25 that pushes the outer end surface of the gland packing 14 in the axial direction of the rotating shaft 8, and a bolt 26 that connects the packing retainer 25 to the pump casing 3. One end of the packing retainer 25 is in contact with the outer end surface of the gland packing 14, and the other end of the packing retainer 25 has a through hole (not shown) into which a bolt 26 is inserted. The tip of the bolt 26 is screwed into the female screw 27 formed on the casing cover 3B of the pump casing 3.

When the bolt 26 is tightened, the packing retainer 25 pushes the gland packing 14 toward the inside of the pump casing 3 along the rotation shaft 8, and as a result, the gland packing 14 is deformed inward in the radial direction thereof. Due to the deformation of the gland packing 14, the contact pressure of the gland packing 14 with respect to the rotating shaft 8 changes. Therefore, the contact pressure of the gland packing 14 with respect to the rotating shaft 8 can be adjusted by tightening the bolt 26.

The bearing housing 17 is fixed to the casing cover 3B of the pump casing 3 by bolts 30. The bearing housing 17 has a drain hole 33 formed at the bottom thereof. A support column 34 is fixed to the bearing housing 17. The columns 34 and legs 10 are fixed to a base (not shown).

During the operation of the pump, the outer peripheral surface of the rotating shaft 8 is in sliding contact with the inner peripheral surface of the gland packing 14. In order to prevent the gland packing 14 from seizing, it is allowed that a certain amount of liquid leaks along the inner peripheral surface of the gland packing 14.

The liquid leaked along the inner peripheral surface of the gland packing 14 flows on the packing retainer 25 and falls downward from the packing retainer 25. The liquid that has fallen from the packing retainer 25 is received by the bottom of the bearing housing 17 and flows out of the pump through the drain hole 33. The liquid flowing out through the drain hole 33 is recovered by a liquid recovery means (not shown). Thus, some liquid leakage is allowed to prevent seizure of the gland packing 14.

On the other hand, leakage of liquid along the outer peripheral surface of the gland packing 14 should not be allowed from the viewpoint of preventing deterioration of pump performance. When the bolt 26 is tightened, the outer peripheral surface of the gland packing 14 is strongly pressed against the inner peripheral surface of the packing housing 22, so that there is a substantial gap between the outer peripheral surface of the gland packing 14 and the inner peripheral surface of the packing housing 22. Is not formed in. However, since the gland packing 14 is made of a fibrous material, it is not possible to completely prevent the liquid from leaking along the outer peripheral surface of the gland packing 14.

Therefore, the pump of the present embodiment includes a liquid leakage guide device 20 for guiding the liquid leaked along the outer peripheral surface of the gland packing 14 to the drain hole 33. The liquid leakage guide device 20 is fixed to the outer peripheral surface 22a of the packing housing 22. The liquid leakage guide device 20 is located at a position farther from the pump casing 3 than the joint surface 35 between the pump casing 3 and the bearing housing 17 in the axial direction of the rotating shaft 8. The reason for arranging the liquid at such a position is to prevent the liquid from coming into contact with the joint surface 35 by blocking the leaked liquid with the liquid leakage guide device 20 and dropping it into or near the drain hole 33. Is.

2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 (a) is a view of the liquid leakage guide device 20 viewed from the axial direction of the rotating shaft 8, and FIG. 3 (b) is a view of FIG. 3 (b). ) Is a cross-sectional view taken along the line BB. The liquid leakage guide device 20 has an annular guide member 40. In one embodiment, there may be a notch in the upper part of the guide member 40. The guide member 40 is made of a metal such as stainless steel having corrosion resistance. As shown in FIG. 3B, the guide member 40 has a circular cross section.

The guide member 40 has an inner peripheral surface 40a shaped along the outer peripheral surface 22a of the packing housing 22. The inner peripheral surface 40a of the guide member 40 has the same curvature as the outer peripheral surface 22a of the packing housing 22, and the inner peripheral surface 40a of the guide member 40 fits into the outer peripheral surface 22a of the packing housing 22. Therefore, the guide member 40 can be fixed to the outer peripheral surface 22a of the packing housing 22 without a gap. In one embodiment, the guide member 40 is fixed to the outer peripheral surface 22a of the packing housing 22 by welding. In order to completely fill the gap between the inner peripheral surface 40a of the guide member 40 and the outer peripheral surface 22a of the packing housing 22, the annular contact surface between the guide member 40 and the packing housing 22 may be covered with a caulking material. In the present embodiment, the guide member 40 has an annular shape (or a ring shape), but if the guide member 40 has an inner peripheral surface 40a having a shape along the outer peripheral surface 22a of the packing housing 22, the guide member 40 has another shape. You may.

FIG. 4 is an enlarged cross-sectional view showing a part of the pump shown in FIG. As shown by the arrows in FIG. 4, the liquid leaked along the outer peripheral surface of the gland packing 14 passes through the gap between the packing retainer 25 and the packing housing 22, and further flows on the outer peripheral surface 22a of the packing housing 22. It reaches the guide member 40 of the liquid leakage guide device 20. The flow of liquid is once blocked by the guide member 40 and then falls from the lowermost end of the guide member 40. Since the lowermost end of the guide member 40, particularly the guide member 40, is outside the joint surface 35 between the pump casing 3 and the bearing housing 17 in the axial direction (at a position farther than the pump casing 3), the guide member 40 is separated from the guide member 40. The dropped liquid does not flow to the joint surface 35 and is discharged to the outside of the pump through the drain hole 33. The liquid discharged from the drain hole 33 is recovered by a liquid recovery means (not shown).

As described above, according to the present embodiment, the liquid leaked along the outer peripheral surface of the gland packing 14 is blocked by the guide member 40 and therefore does not reach the pump casing 3. Therefore, the liquid does not flow to the joint surface 35 between the pump casing 3 and the bearing housing 17, and unintentional leakage from the joint surface 35 is prevented.

As can be seen from FIG. 4, the liquid leaked along the outer peripheral surface of the gland packing 14 is blocked by the lower part of the guide member 40. Therefore, there may be a notch in the upper part of the guide member 40 as long as the liquid can be blocked. For example, as shown in FIGS. 5A and 5B, the guide member 40 may have a notch 40b above it. In the example shown in FIG. 5A, the angle θ between the two straight lines connecting both ends of the guide member 40 forming the notch 40b and the center O of the guide member 40 is about 90 degrees. In the example shown in FIG. 5B, the angle θ is about 170 degrees.

When the size of the notch 40b is represented by the angle θ shown in FIGS. 5A and 5B, it is desirable that the size of the notch 40b is less than 180 degrees. If the size of the notch 40b is less than 180 °, there is no possibility that the guide member 40 will fall from the outer peripheral surface 22a of the packing housing 22. On the other hand, if the size of the notch 40b exceeds 180 °, the guide member 40 may fall or the liquid may not be sufficiently blocked.

The guide member 40 shown in FIGS. 3 and 5 has a circular cross section, but as shown in FIGS. 6 (a) and 6 (b), the guide member 40 may have a triangular cross section. Good. FIG. 6A is a diagram showing another embodiment of the liquid leakage guide device 20, and FIG. 6B is a sectional view taken along line CC shown in FIG. 6A. As shown in FIG. 6B, the inner edge of the guide member 40 is composed of one of the three corners of the triangle that constitutes the cross section of the guide member 40.

FIG. 7 is a diagram showing still another embodiment of the liquid leakage guide device 20. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 3 and 4, the duplicate description thereof will be omitted. As shown in FIG. 7, a part of the ring-shaped guide member 40 is divided. The liquid leakage guide device 20 includes a combination of a bolt 43 and a nut 44 as a fastening mechanism for fastening the divided ends 41 of the guide member 40 to each other.

FIG. 8 is a perspective view showing a liquid leakage guide device 20 in a state where the bolt 43 and the nut 44 are removed. The divided ends 41 of the guide member 40 each have a through hole 41a. These through holes 41a are aligned in a straight line when the end portions 41 are brought into contact with each other. The bolt 43 is inserted into the respective through hole 41a of the two end portions 41, and the nut 44 is screwed into the bolt 43.

As shown in FIG. 7, by tightening the bolt 43 and the nut 44, the guide member 40 is firmly fixed to the outer peripheral surface 22a (see FIG. 4) of the packing housing 22. Therefore, it is possible to eliminate the gap between the guide member 40 and the outer peripheral surface 22a of the packing housing 22. Further, in the present embodiment, it is not necessary to weld the guide member 40 to the outer peripheral surface 22a of the packing housing 22, and the liquid leakage guide device 20 can be easily attached to and removed from the packing housing 22.

Instead of the combination of the bolt 43 and the nut 44, a snap lock may be used as the fastening mechanism. 9 (a) and 9 (b) are diagrams showing an embodiment in which a snap lock is used as a fastening mechanism. The snap lock 50 includes a snap lock body 50A fixed to one of the two ends 41 of the guide member 40, and a protrusion 50B attached to the other end 41. FIG. 9A shows a state in which the two ends 41 are fastened to each other by the snap lock 50, and FIG. 9B shows a state in which the snap lock 50 is opened. According to the embodiments shown in FIGS. 9 (a) and 9 (b), the liquid leakage guide device 20 can be easily attached and detached by the packing housing 22.

FIG. 10 is a diagram showing still another embodiment of the liquid leakage guide device 20. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 7 and 8, the duplicate description thereof will be omitted. The guide member 40 is divided into a plurality of divided bodies 55. The liquid leakage guide device 20 includes two sets of bolts 43 and nuts 44 as a plurality of fastening mechanisms for fastening the divided bodies 55 to each other. The circumferential length of each divided body 55 is less than half of the total peripheral length of the guide member 40.

In the embodiment shown in FIG. 10, the guide member 40 is divided into two divided bodies 55, and each divided body 55 has a semicircular arc shape. The liquid leakage guide device 20 includes two sets of bolts 43 and nuts 44 as two fastening mechanisms for fastening these two split bodies 55 to each other. However, the present invention is not limited to the present embodiment, the guide member 40 is divided into three or more divided bodies 55, and the liquid leakage guide device 20 is three or more sets for fastening these three or more divided bodies 55 to each other. Bolt 43 and nut 44 may be provided. In one embodiment, the fastening mechanism may be the snap lock 50 shown in FIGS. 9 (a) and 9 (b).

According to this embodiment, the liquid leakage guide device 20 can be attached to the pump already assembled. That is, the split body 55 is arranged on the outer peripheral surface 22a (see FIG. 4) of the packing housing 22, and the split bodies 55 are fastened to each other by bolts 43 and nuts 44 to form an annular guide member 40 and at the same time guide. The member 40 can be fixed to the outer peripheral surface 22a of the packing housing 22. Further, according to the present embodiment, the liquid leakage guide device 20 can be easily removed from the packing housing 22 without disassembling the pump.

The guide member 40 shown in FIGS. 7 to 10 has a circular cross section as in the embodiment described with reference to FIG. 3 (b), but in one embodiment, FIGS. 7 to 10 The guide member 40 shown in FIG. 6 may have a triangular cross section described with reference to FIG. 6 (b).

FIG. 11 is a diagram showing still another embodiment of the liquid leakage guide device 20. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 7 and 8, the duplicate description thereof will be omitted. The guide member 40 includes an outer ring 57 and an inner ring 58 arranged on the inner peripheral surface of the outer ring 57. The outer ring 57 is made of a corrosion-resistant metal such as stainless steel, and the inner ring 58 is made of a liquid-tight elastic material such as rubber.

A part of the outer ring 57 is divided, and the divided ends 41 of the outer ring 57 are fastened to each other by bolts 43 and nuts 44, which are examples of the fastening mechanism. That is, through holes (not shown) are formed in the divided ends 41 of the outer ring 57, respectively. Bolts are inserted into the respective through holes of the two ends 41 and the nut 44 is screwed into the bolt 43. A part of the inner ring 58 is also divided in the same manner. More specifically, a notch 58a is formed at the top of the inner ring 58. In the present embodiment, the outer ring 57 and the inner ring 58 have a rectangular cross section, but may have a cross section of another shape. For example, the inner ring 58 made of elastic material may have a circular or triangular cross section.

When the bolt 43 and the nut 44 are tightened, the inner ring 58 constituting the inner peripheral surface 40a of the guide member 40 is strongly pressed against the outer peripheral surface 22a (see FIG. 4) of the packing housing 22. As a result, the gap between the inner peripheral surface 40a of the guide member 40 and the outer peripheral surface 22a of the packing housing 22 can be eliminated. The inner ring 58 made of an elastic material functions as a seal, and can surely prevent the liquid from passing through the gap between the guide member 40 and the packing housing 22.

FIG. 12 is a diagram showing still another embodiment of the liquid leakage guide device 20. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIG. 11, the duplicated description will be omitted. The outer ring 57 is divided into a plurality of divided bodies 59, and these divided bodies 59 are fastened to each other by a plurality of sets of bolts 43 and nuts 44 constituting the plurality of fastening mechanisms. A part of the inner ring 58 is also divided. More specifically, a notch 58a is formed at the top of the inner ring 58.

The circumferential length of each of the divided bodies 59 constituting the outer ring 57 is less than half of the total peripheral length of the guide member 40. The outer ring 57 is divided into two divided bodies 59, and each divided body 59 has a semicircular arc shape. The liquid leakage guide device 20 includes two sets of bolts 43 and nuts 44 as two fastening mechanisms for fastening these two split bodies 59 to each other. However, the present invention is not limited to the present embodiment, the outer ring 57 is divided into three or more divided bodies 59, and the liquid leakage guide device 20 has three or more sets for fastening these three or more divided bodies 59 to each other. Bolts 43 and nuts 44 may be provided.

When the bolt 43 and the nut 44 are tightened, the inner ring 58 constituting the inner peripheral surface 40a of the guide member 40 is strongly pressed against the outer peripheral surface 22a (see FIG. 4) of the packing housing 22. As a result, the gap between the inner peripheral surface 40a of the guide member 40 and the outer peripheral surface 22a of the packing housing 22 can be eliminated. The inner ring 58 made of an elastic material functions as a seal, and can surely prevent the liquid from passing through the gap between the guide member 40 and the packing housing 22.

The inner ring 58 may have a plurality of notches 58a, but from the viewpoint of preventing the passage of liquid, it is preferable that the number of notches 58a is small. The fastening mechanism shown in FIGS. 11 and 12 is composed of a combination of a bolt 43 and a nut 44, but the fastening mechanism may be the snap lock 50 shown in FIGS. 9 (a) and 9 (b). ..

FIG. 13 is a perspective view showing still another embodiment of the liquid leakage guide device 20, and FIG. 14 is a side view of the liquid leakage guide device 20 shown in FIG. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 3 and 4, the duplicate description thereof will be omitted. The liquid leakage guide device 20 of the present embodiment includes a liquid receiving member 70 fixed to the lower end of the guide member 40. As shown in FIG. 14, the liquid receiving member 70 is tilted with respect to the central axis CL of the guide member 40.

The lower end of the guide member 40 is fixed to the upper surface of the liquid receiving member 70 by a fixing means such as welding. In one embodiment, the lower end of the guide member 40 may be detachably fixed to the upper surface of the liquid receiving member 70. For example, as shown in FIG. 15, the lower end of the guide member 40 is detachably fixed to the upper surface of the liquid receiving member 70 by a screw 47. The screw hole 48 is formed at the lower end of the guide member 40 and opens downward. The screw hole 48 does not penetrate the guide member 40 in order to prevent liquid leakage through the screw hole 48. The screw 47 extends through the liquid receiving member 70, and the tip of the screw 47 is screwed into the screw hole 48 of the guide member 40.

The liquid receiving member 70 has a liquid flow path 73 on its upper surface. The lower end of the guide member 40 is located in the liquid flow path 73. The entire guide member 40 including the liquid flow path 73 is inclined downward from the lower end of the guide member 40. The lower end of the liquid flow path 73 is located at the lower end of the liquid receiving member 70. In the present embodiment, the liquid receiving member 70 is a plate-shaped member, and the liquid flow path 73 is composed of a groove formed on the upper surface of the liquid receiving member 70. However, the shape of the liquid receiving member 70 and the shape of the liquid flow path 73 are not limited to this embodiment as long as the liquid can flow downward on the liquid receiving member 70. In one embodiment, a dike that guides the liquid downward may be provided on the upper surface of the liquid receiving member 70.

FIG. 16 is a diagram showing an example in which the liquid leakage guide device 20 shown in FIGS. 13 and 14 is incorporated in the pump shown in FIG. Similar to each of the embodiments described so far, the guide member 40 is fixed to the outer peripheral surface 22a of the packing housing 22. The lower end of the liquid flow path 73 and the lowermost end of the liquid receiving member 70 are located farther from the pump casing 3 than the joint surface 35 between the pump casing 3 and the bearing housing 17 in the axial direction of the rotating shaft 8. The liquid receiving member 70 is directly above the drain hole 33. In such a configuration, as shown by the arrow in FIG. 16, the liquid leaked along the outer peripheral surface of the gland packing 14 is temporarily blocked by the guide member 40 and collected in the liquid flow path 73 of the liquid receiving member 70. Be done. The liquid flows in the liquid flow path 73 inclined downward, and falls from the lowermost end of the liquid receiving member 70.

Since the lowermost end of the liquid receiving member 70 is axially outside the joint surface 35 between the pump casing 3 and the bearing housing 17 (at a position farther than the pump casing 3), the liquid receiving member 70 has fallen from the liquid leakage guide device 20. The liquid does not flow to the joint surface 35 and is discharged out of the pump through the drain hole 33. The liquid discharged from the drain hole 33 is recovered by a liquid recovery means (not shown). According to the present embodiment, the liquid can be collected by the liquid receiving member 70 and dropped into the drain hole 33 or in the vicinity of the drain hole 33.

The embodiment of the guide member 40 described with reference to FIGS. 5 to 12 may be applied to the guide member 40 of the embodiment shown in FIGS. 13 to 16.

FIG. 17 is a perspective view showing still another embodiment of the liquid leakage guide device 20, FIG. 18 is a side view of the liquid leakage guide device 20 shown in FIG. 17, and FIG. 19 is a D- It is a D line sectional view. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 13 to 16, the duplicate description thereof will be omitted.

The entire liquid leakage guide device 20 including the guide member 40 and the liquid receiving member 70 is divided into two divided bodies. That is, the guide member 40 is divided into a left arc body 40-1 and a right arc body 40-2, and the liquid receiving member 70 is also divided into a left liquid receiving portion 70-1 and a right liquid receiving portion 70-2. There is. The length of each of the left arc body 40-1 and the right arc body 40-2 in the circumferential direction is less than half of the total peripheral length of the guide member 40. In the present embodiment, the left arc body 40-1 and the right arc body 40-2 have a semicircular shape. The lower end of the left arc body 40-1 is fixed to the left liquid receiving portion 70-1, and the lower end of the right arc body 40-2 is fixed to the right liquid receiving portion 70-2.

The liquid leakage guide device 20 includes a plurality of fastening mechanisms for fastening the two divided bodies to each other. Specifically, as shown in FIG. 19, the liquid leakage guide device 20 is a bolt 43 as a first fastening device for fastening the upper ends 41 of the left arc body 40-1 and the right arc body 40-2 to each other. It also includes a combination of a nut 44 and a bolt 78 and a nut 79 as a second fastening device for fastening the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2 to each other.

The upper ends 41 of the left arc body 40-1 and the right arc body 40-2 each have a through hole (not shown) into which the bolt 43 is inserted. The bolt 43 is inserted into the respective through hole of the two upper ends 41, and the nut 44 is screwed into the bolt 43. The left liquid receiving portion 70-1 and the right liquid receiving portion 70-2 have a protrusion 76 having a through hole (not shown) into which the bolt 78 is inserted. The two protrusions 76 are provided on the bottoms of the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2, respectively. The bolt 78 is inserted into the respective through hole of the two protrusions 76, and the nut 79 is screwed into the bolt 78.

The liquid leakage guide device 20 further includes a block body 80 arranged inside the liquid receiving member 70. The block body 80 is arranged in the hole 83 formed in the liquid receiving member 70. The hole 83 is opened at the lower end of the liquid receiving member 70, and the block body 80 is fitted into the hole 83 of the liquid receiving member 70. The block body 80 is arranged so as to cross the mating surface 71 (see FIG. 19) of the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2. These mating surfaces 71 are located in the liquid flow path 73. The block body 80 is provided to receive the liquid that has passed through the minute gap between the mating surfaces 71 and guide the liquid to the lowermost end of the liquid receiving member 70.

FIG. 20 is a diagram showing a state in which the liquid leakage guide device 20 is divided. The first fastening mechanism, the bolt 43 and the nut 44, are removed, and the second fastening mechanism, the bolt 78 and the nut 79, are removed. The left arc body 40-1 and the right arc body 40-2 are separated from each other, and similarly, the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2 are also separated from each other. As a result, the liquid leakage guide device 20 is divided into two divided bodies.

According to this embodiment, the liquid leakage guide device 20 can be attached to the pump already assembled. That is, the left arc body 40-1 and the right arc body 40-2 are arranged on the outer peripheral surface 22a (see FIG. 16) of the packing housing 22, and the left arc body 40-1 is provided by the bolt 43 and the nut 44 as the first fastening mechanism. And the right arc body 40-2 are fastened to each other, and the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2 are fastened to each other by the bolt 78 and the nut 79 as the second fastening mechanism to guide the annular guide. At the same time as forming the member 40, the guide member 40 can be fixed to the outer peripheral surface 22a of the packing housing 22. FIG. 21 is a diagram showing a state in which the liquid leakage guide device 20 shown in FIG. 17 is attached to the outer peripheral surface 22a of the packing housing 22. Further, according to the present embodiment, the liquid leakage guide device 20 can be easily removed from the packing housing 22 without disassembling the pump.

In one embodiment, as shown in FIG. 22, the block body 80 may have a guide flow path 81 on its upper surface. The guide flow path 81 is located directly below the mating surfaces 71 of the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2, and extends along these mating surfaces 71. The guide flow path 81 is inclined in the same manner as the block body 80, and extends to the lower end of the block body 80. The liquid that has passed through the minute gap between the mating surfaces 71 of the left liquid receiving portion 70-1 and the right liquid receiving portion 70-2 is received by the guide flow path 81 of the block body 80, and the guide flow path 81 is pushed downward. It flows. The liquid reaches the lowermost end of the liquid receiving member 70 and falls from the lowermost end of the liquid receiving member 70.

The guide flow path 81 is provided to prevent the liquid that has passed through the mating surface 71 from reaching the lower surface of the block body 80 through the side surface of the block body 80. The cross-sectional shape of the guide flow path 81 is not particularly limited as long as the liquid can be guided to the lowermost end of the liquid receiving member 70. For example, as shown in FIG. 23, the entire upper surface of the block body 80 may be recessed downward, and the guide flow path 81 may be formed by the recessed upper surface.

FIG. 24 is a perspective view showing still another embodiment of the liquid leakage guide device 20. Since the configuration of the present embodiment, which is not particularly described, is the same as that of the embodiment described with reference to FIGS. 13 to 16, the duplicate description thereof will be omitted. The guide member 40 is divided into two divided bodies 55, while the liquid receiving member 70 is not divided. One of the two divided bodies 55 is fixed to the liquid receiving member 70. The length of each of the divided bodies 55 in the circumferential direction is less than half of the total peripheral length of the guide member 40. In the present embodiment, each divided body 55 has a semicircular shape.

The liquid leakage guide device 20 includes a plurality of fastening mechanisms for fastening the two divided bodies 55 to each other. Specifically, the liquid leakage guide device 20 includes a combination of a bolt 43 and a nut 44 as a fastening device. The end 41 of the divided body 55 of the guide member 40 has a through hole (not shown) into which the bolt 43 is inserted. The bolt 43 is inserted into the respective through hole of the two ends 41, and the nut 44 is screwed into the bolt 43.

According to this embodiment, the liquid leakage guide device 20 can be attached to the pump already assembled. That is, the two divided bodies 55 are arranged on the outer peripheral surface 22a (see FIG. 16) of the packing housing 22, and the divided bodies 55 are fastened to each other by the bolts 43 and the nuts 44 to form the annular guide member 40 at the same time. The guide member 40 can be fixed to the outer peripheral surface 22a of the packing housing 22. Further, according to the present embodiment, the liquid leakage guide device 20 can be easily removed from the packing housing 22 without disassembling the pump.

In the embodiment shown in FIG. 24, the guide member 40 is divided into two divided bodies 55, and each divided body 55 has a semicircular arc shape. However, the present invention is not limited to the present embodiment, the guide member 40 is divided into three or more divided bodies 55, and the liquid leakage guide device 20 has three or more divided bodies 55 for fastening these three or more divided bodies 55 to each other. The fastening mechanism may be provided.

The guide member 40 in each of the embodiments described with reference to FIGS. 13 to 24 has a circular cross section as in the embodiment described with reference to FIG. 3B, but the guide member 40 may have a triangular cross section as shown in FIGS. 6 (a) and 6 (b). The embodiment of the guide member 40 shown in FIG. 11 can also be applied to the guide member 40 in each embodiment described with reference to FIGS. 14 to 24. In each of the embodiments described with reference to FIGS. 17 to 24, the fastening mechanism is the snap lock 50 shown in FIGS. 9 (a) and 9 (b) instead of the combination of the bolt 43 and the nut 44. May be good.

A method of attaching the above-mentioned liquid leakage guide device 20 to the packing housing 22 to a pump in which liquid leaks along the outer peripheral surface of the gland packing 14 will be described with reference to FIG.
[Step 1] Pump operation stop step If the pump is in operation, stop the operation of the pump.

[Step 2] Mounting step of the guide member 20 For example, as shown in FIGS. 5A and 5B, when the guide member 40 has a notch 40b at its upper portion, the guide member 40 is cut. The liquid leakage guide device 20 can be mounted without disassembling the pump by fitting it into the packing housing 22 through the notch 40b. As shown in FIGS. 7 to 12, a part of the guide member 40 is divided, and a fastening mechanism (for example, a bolt 43 and a nut) in which the liquid leakage guide device 20 fastens the divided ends of the guide member 40 to each other. In the case of providing (combination with 44), the guide member 40 is attached to the packing housing 22, and the divided ends of the guide member 40 are fastened to each other by the fastening mechanism, so that the liquid leaks without disassembling the pump. The guide device 20 can be attached. As shown in FIGS. 11 and 12, when the guide member 40 includes the outer ring 57 and the inner ring 58, the outer ring 57 may be attached after the inner ring 58 is attached to the packing housing 22.

[Step 3] Adjustment Step of Guide Member 40 The gland packing 14 has a seam (not shown), and is usually arranged so that the outermost seam is located at the bottom of the gland packing 14. Therefore, the liquid is most likely to leak at the bottom where the gland packing 14 has a seam. Therefore, the guide member 40 is rotated around the axis of the pump so that the notch 40b or the fastening mechanism is arranged at a position different from the lowermost portion of the gland packing 14, and the notch 40b or the fastening mechanism is provided. The position needs to be adjusted. This makes it possible to prevent the liquid from leaking from the notch 40b or the divided portion of the guide member 40. The guide member 40 is not limited to each of the above embodiments as long as it has a shape that can be brought into close contact with the outer peripheral surface 22a of the packing housing 22.

[Step 4] Liquid receiving member attachment step In the case of the liquid leakage guide device 20 having the liquid receiving member 70, the liquid receiving member 70 is attached to the guide member 40. At this time, the liquid receiving member 70 is attached so that the leaked liquid is guided to the drain hole 33 of the pump.
[Step 5] Pump operation start step The pump operation is restarted.

Each embodiment of the liquid leakage guide device 20 described so far can be applied not only to the single suction type pump shown in FIG. 1 but also to other types of pumps. For example, each embodiment of the above-mentioned liquid leakage guide device 20 can be applied to the double suction type pump shown in FIG. 26. Hereinafter, both suction pumps will be described with reference to FIG. 26. In FIG. 26, members that are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and the overlapping description thereof will be omitted.

As shown in FIG. 26, this type of pump has a pump casing 3 having a liquid suction port and a liquid discharge port, an impeller 7 arranged in the pump casing 3, and a rotating shaft to which the impeller 7 is fixed. 8, a gland packing 14 that seals a gap between the rotary shaft 8 and the pump casing 3, a bearing housing 17 that holds a bearing 15 that rotatably supports the rotary shaft 8, and a leak according to the embodiment shown in FIG. The liquid guide device 20 is provided.

The impeller 7 is a double suction type impeller 7 provided with two liquid inlets 7a and one liquid outlet 7b. The two liquid inlets 7a are on both sides of the impeller 7 and face in opposite directions. In the pump casing 3, a suction side flow path 91 communicating with the two liquid inlets 7a of the impeller 7 and a discharge side flow path 93 communicating with the liquid outlet 7b of the impeller 7 are formed. The pump casing 3 includes a partition wall 95 that separates the suction side flow path 91 and the discharge side flow path 93. The suction side flow path 91 is located outside the partition wall 95, and the discharge side flow path 93 is located inside the partition wall 95.

The gland packing 14 is arranged on both sides of the pump casing 3. The two bearing housings 17 that hold the two bearings 15 are connected to both sides of the pump casing 3. The two liquid leakage guide devices 20 are fixed to the outer peripheral surfaces of the two packing housings 22 of the pump casing 3. Similar to the embodiments described so far, the liquid leaked along the outer peripheral surface of the gland packing 14 flows along the outer peripheral surface of the packing housing 22, is temporarily blocked by the guide member 40, and is the liquid of the liquid receiving member 70. It is collected in the flow path 73 (see FIG. 13). The liquid flows in the liquid flow path 73 inclined downward, and falls from the lowermost end of the liquid receiving member 70.

Since the lowermost end of the liquid receiving member 70 is axially outside the joint surface 35 between the pump casing 3 and the bearing housing 17 (at a position farther than the pump casing 3), the liquid receiving member 70 has fallen from the liquid leakage guide device 20. The liquid does not flow to the joint surface 35 and is discharged out of the pump through the drain hole 33. The liquid discharged from the drain hole 33 is recovered by a liquid recovery means (not shown). According to the present embodiment, the liquid can be collected by the liquid receiving member 70 and dropped into the drain hole 33 or in the vicinity of the drain hole 33.

In the embodiment shown in FIG. 26, the liquid leakage guide device 20 shown in FIG. 13 is used, but the liquid leakage guide device 20 according to another embodiment is used depending on the positional relationship between the drain hole 33 and the packing housing 22. You may.

The above-described embodiment is described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention belongs to carry out the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments, but is construed in the broadest range according to the technical idea defined by the claims.

3 Pump casing 3a Suction port 3b Discharge port 3c Volute chamber 3A Impeller casing 3B Casing cover 7 Impeller 8 Rotating shaft 10 Leg 14 Ground packing 15 Bearing 17 Bearing housing 20 Leakage guide device 22 Packing housing 25 Packing retainer 26 bolts 27 Female screw 30 Bolt 33 Drain hole 34 Strut 35 Joint surface 40 Guide member 40a Inner peripheral surface 40b Notch 40-1 Left arc body 40-2 Right arc body 41 End 43 Bolt 44 Nut 47 Screw 48 Screw hole 50 Click lock 50A Clicking lock body 50B Protrusion 55 Divided body 57 Outer ring 58 Inner ring 58a Notch 59 Divided body 70 Liquid receiving member 70-1 Left liquid receiving part 70-2 Right liquid receiving part 71 Alignment surface 73 Liquid flow path 76 Protruding part 78 Bolt 79 Nut 80 Block 81 Guide flow path 83 Hole 91 Suction side flow path 93 Discharge side flow path 95 Partition

Claims (13)

A liquid leakage guide device for guiding the leaked liquid along the outer peripheral surface of the gland packing.
A liquid leakage guide device including a guide member having an inner peripheral surface shaped along the outer peripheral surface of the packing housing in which the gland packing is housed. The liquid leakage guide device according to claim 1, wherein the guide member has a notch in the upper portion thereof. A part of the guide member is divided and
The liquid leakage guide device according to claim 1, further comprising a fastening mechanism for fastening the divided ends of the guide members to each other. The guide member includes an outer ring and an inner ring arranged on the inner peripheral surface of the outer ring.
The fastening mechanism is configured to fasten the divided ends of the outer ring to each other.
The liquid leakage guide device according to claim 3, wherein the inner ring is made of an elastic material. The guide member is divided into a plurality of divided bodies, and the guide member is divided into a plurality of divided bodies.
The liquid leakage guide device according to claim 1, further comprising a plurality of fastening mechanisms for fastening the plurality of divided bodies to each other. The guide member includes an outer ring and an inner ring arranged on the inner peripheral surface of the outer ring.
The outer ring is divided into a plurality of divided bodies, and the outer ring is divided into a plurality of divided bodies.
At least a part of the inner ring is divided,
The liquid leakage guide device further includes a plurality of fastening mechanisms for fastening the plurality of divided bodies to each other.
The liquid leakage guide device according to claim 1, wherein the inner ring is made of an elastic material. The liquid leakage guide device according to any one of claims 1 to 6, further comprising a liquid receiving member fixed to the lower end of the guide member. The liquid leakage guide device according to claim 7, wherein the liquid receiving member is inclined with respect to the central axis of the guide member. The liquid leakage guide device according to claim 7 or 8, wherein the liquid receiving member has a liquid flow path on the upper surface thereof. With the pump casing
An impeller arranged in the pump casing and
The rotating shaft to which the impeller is fixed and
A gland packing that seals the gap between the rotating shaft and the pump casing,
A bearing housing that holds a bearing that rotatably supports the rotating shaft,
The liquid leakage guide device according to any one of claims 1 to 9 is provided.
The pump casing has a cylindrical packing housing in which the gland packing is housed.
The liquid leakage guide device is fixed to the outer peripheral surface of the packing housing.
The bearing housing has a drain hole at the bottom thereof.
The lowermost end of the liquid leakage guide device is a pump located at a position farther from the pump casing than the joint surface between the pump casing and the bearing housing. It is a method of installing a liquid leakage guide device for guiding the leaked liquid along the outer peripheral surface of the gland packing of the pump.
The liquid leakage guide device includes a guide member having an inner peripheral surface that can follow the outer peripheral surface of the packing housing in which the gland packing is housed.
A mounting step for attaching the guide member to the outer peripheral surface of the packing housing,
A method comprising an adjustment step of adjusting the mounting position of the guide member. The guide member has a notch and has a notch.
The method according to claim 11, wherein the adjustment step is a step of adjusting the position of the notch so that the notch is arranged at a position different from the lowermost portion of the gland packing. A part of the guide member is divided and
The liquid leakage guide device further includes a fastening mechanism for fastening the divided ends of the guide members to each other.
The method according to claim 11, wherein the adjusting step is a step of adjusting the position of the fastening mechanism so that the fastening mechanism is arranged at a position different from the lowermost portion of the gland packing.

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