JP3058836U - Rotary valve - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent damage to a seal part at the time of taking out and mounting a rotor, to maintain the sealing property of the seal part for a long time, and to disassemble and assemble without being affected by changes in the external environment. An object of the present invention is to provide a rotary valve capable of easily performing operations and improving maintenance. A driving shaft (30) has a fitting hole (32) for mounting one shaft (36) of a rotor (22). Does not move on the seal surface of the seal portion, so that the seal surface is not worn or damaged, and the airtightness of the seal portion can be maintained for a long time.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improvement of a rotary valve used for treating incineration ash.

[0002]

[Prior art]

 Conventionally, rotary valves have been used for treating incineration ash generated from incinerators of municipal waste treatment facilities installed by local governments and private companies.

[0003] When the ambient temperature decreases at night when the operation of the rotary valve is stopped, moisture contained in the incinerated ash condenses and adheres to the inside of the rotary valve, and the rotor stops rotating. Had a problem.

[0004] When such a phenomenon occurs, the rotary valve is disassembled and the inside is cleaned to remove incinerated ash attached to the inside of the rotary valve.

[0005] The conventional rotary valve of this type has a structure in which it is difficult to disassemble and reassemble the rotary valve when cleaning particulate matter such as incineration ash adhered to the inside of the rotary valve. Even if the rotor is disassembled and taken out, the shaft remains inside the rotary valve, making cleaning difficult.

Accordingly, the applicant has conducted intensive research, developed and applied for a rotary valve that solved these problems (Japanese Utility Model Application No. Hei 8-4336).

In this rotary valve, as shown in FIG. 4, a casing 1 has an upper transfer port 2 for receiving a granular material by a predetermined amount and a lower transfer port 3 for discharging a granular material by a predetermined amount. It is opened so as to communicate in the vertical direction of 1a. Openings 4a and 4b are opened on both sides of the casing, and one opening 4a is formed so that the rotor 6 can enter and exit the valve chamber 1a. The opening 4b is closed by the first side cover 9.

The first side cover 9 is integrally formed with a frame 8 protruding outward. A first bearing 10 is attached to an outer end of the frame 8, and the first bearing 10 is attached to the first side cover 9. The drive shaft 5 is rotatably supported by the bearing 10 in a state where the drive shaft 5 is rotatable and the movement in the axial direction is restrained. One end is extended outward and the other is arranged so as to face the drive side surface of the casing 11. It is established.

In addition, a seal member 13 is provided in an insertion hole 12 formed in the first side cover 9, and the rotor 6 is inserted through the first side cover 9 by a gland packing 14 that forms a part of the seal member 13. One of the shaft portions 15 is sealed.

A fitting hole 16 is formed at an end of one shaft portion 15 of the rotor 6, and the drive shaft 5 is detachably mounted coaxially through a key 18 in the fitting hole 16.

With this configuration, the work of attaching and detaching the rotor 6 is easily performed from the opening 4a on one side, and when the rotor 6 is removed, the inside of the valve chamber 1a is widely opened. The cleaning unit can easily clean the powder particles attached to the chamber 1a.

[0012]

[Problems to be solved by the invention]

 The applicant has further studied, and when the rotor 6 is taken in and out for cleaning the inside, the shaft face 15 of the rotor 6 which has conventionally been in direct contact with the sealing surface of the gland packing 14 constituting the seal portion is provided. The point that the sealing property is maintained for a long period of time by avoiding the contact of the drive shaft 5 and that the mounting portion between the drive shaft 5 and one of the shaft portions 15 of the rotor is hardly affected by changes in the external environment. Focusing on long-term protection, the rotary valve of the present invention was developed.

[0013] The present invention avoids damage to the seal portion at the time of taking out and mounting the rotor, maintains the sealability of the seal portion for a long time, and disassembles and assembles without being affected by changes in the external environment. An object of the present invention is to provide a rotary valve capable of easily performing operations and improving maintenance.

[0014]

[Means for Solving the Problems]

 The gist of the present invention for constructing such an object is as follows: (1) A predetermined amount of powder and granules supplied from the upper transfer port is partitioned into the valve chamber of the casing having the upper and lower transfer ports and discharged from the lower transfer port. The casing has a rotatable rotor, a drive side surface of the casing is closed by a first side cover, a first bearing is disposed outside the first side cover, and the rotor is mounted on the other side of the casing. A rotary valve having an opening for entering and exiting the lube chamber, and a second side cover for opening and closing the opening, wherein the first bearing portion rotatably supports a drive shaft. One end of the shaft extends outwardly, and the other end of the shaft extends airtightly through the first side cover to the vicinity of the rotor. Protruding from both sides One of the shaft portions is coaxially and detachably mounted in a fitting hole formed in the other end surface of the drive shaft, and the other shaft portion, which is hermetically inserted from the second side cover, is a second bearing portion. The drive shaft is formed such that a fitting hole is formed in the other shaft end, and one shaft portion of the rotor is mounted in the fitting hole so as to be capable of transmitting rotation. Features rotary valve.

(2) The drive shaft is configured such that an oil supply port is provided on the outer periphery of the other shaft end of the drive shaft so as to supply oil to the fitting hole in which one shaft portion of the rotor is mounted. 2. The rotary valve according to 1.

(3) The drive shaft has a liquid-tight gap formed between one shaft end of the rotor mounted in the fitting hole and the bottom of the fitting hole, and the gap is formed in an oil supply storage chamber. The rotary valve according to claim 2, wherein the rotary valve is configured as:

(4) An insertion hole is formed in the first side cover, and a seal portion for sealing the outer periphery of the other end of the drive shaft is attached to the insertion hole. The seal portion includes a gland packing and the gland packing. 2. A rotary valve according to claim 1, further comprising: a packing case that houses therein and can be attached to and detached from the insertion hole, and a packing press that presses a gland packing housed in the packing case in an axial direction.

[0018]

[Action]

 In the rotary valve of the present invention, when assembling the rotary valve, the driving side surface of the casing is closed with a first side or a bar, and a first bearing portion is mounted outside the first side cover. The drive shaft is rotatably supported on the first bearing portion so that one end of the drive shaft extends outward, and the first side cover is securely inserted through the first side cover so as to extend to the vicinity of the inserted rotor.

Next, a rotor is inserted through the opening on the other side of the casing, and one of the shafts of the rotor is coaxially and detachably mounted on a fitting hole formed on the other end of the precursor drive shaft.

For this reason, the other end of the drive shaft is provided with a fitting hole for mounting one shaft portion of the rotor, so that when the rotor is mounted or removed, one shaft portion of the rotor is sealed by the seal portion. Since it does not move on the seal surface, the seal surface is not worn or damaged, and the airtightness of the seal portion can be maintained for a long time.

Furthermore, when an openable / closable oil supply port is provided on the outer periphery of the other end of the drive shaft, oil is supplied from the oil supply port into a fitting hole in which one shaft portion of the rotor is mounted. The inside of the mounting portion is not affected by the external environment, and the coupling surface is protected for a long time, so that the disassembly and assembly work in taking out and installing the rotor can be performed smoothly.

When a liquid-tight gap is formed between one shaft end of the rotor and the bottom of the fitting hole, and the gap is configured as an oil supply storage chamber, oil is filled in the gap. Since it is always stored, an oil film is formed at the contact area, so that it is not corroded and the connection surface can be protected for a long time.

Further, since the sealing portion for sealing the outer periphery of the other shaft end of the drive shaft accommodates the gland packing in the insertion hole of the first side cover and detachably mounts the packing case pressed and held by the packing presser. In addition, replacement of the gland packing is facilitated, and maintenance of the seal portion can be improved.

[0024]

[Embodiment of the invention]

 Hereinafter, the invention will be described with reference to the drawings. FIG. 1 is a sectional view of a rotary valve according to an embodiment of the present invention, and FIG. 2 is a plan view of the rotary valve.

As shown in FIG. 1, the rotary valve 20 is configured such that a powdery material such as incineration ash supplied into a valve chamber 21 a of a cylindrical casing 21 is rotatably pivoted into the valve chamber 21 a. The rotor 23 is supported so as to be separated by a predetermined amount by the blades 23 and discharged.

The casing 21 has an upper transport port 24 for receiving the supplied granular material and a lower transport port 25 for discharging the granular material by a predetermined amount so as to communicate vertically with the inside of the valve chamber 21a. It is established in. An opening 26a for opening and closing the rotor 22 into and out of the valve chamber 21a is provided on one side of the casing 21, and a driving side opening 26b on the other side is closed by a first side cover 27. ing.

The first side cover 27 is integrally formed with a frame body 28 projecting outward. A first bearing 29 is attached to an outer end of the frame body 28. The drive shaft 30 is rotatably supported by the one bearing portion 29 in a state where the drive shaft 30 is rotatable and the axial movement thereof is restrained, and one end extends outward and the other end faces the drive side surface of the casing 21. It is set up.

An end of the drive shaft 30 on the casing side is formed to have a large diameter, and a fitting hole 32 is formed in this end, and a key groove (not shown) is formed in the fitting hole 32. It has been. Further, a hollow hole 38 having an enlarged diameter is formed in the inner bottom portion of the fitting hole 32, and an oil supply port 48 that can be supplied from the outside is formed in the hollow hole 38.

On the other hand, an insertion hole 33 is formed in the first side cover 27, and a seal member 34 is provided in the insertion hole 33. The seal member 34 seals the outer periphery of the end of the drive shaft 30 on the casing side. The seal member 34 includes a gland packing 35, a packing case 35 a for accommodating the gland packing 35 and detachable from the insertion hole 33, The gland packing 35 accommodated in the case 35a is constituted by a packing holder 35b for pressing the gland packing 35 in the axial direction.

The rotor 22 has shaft portions 36 and 37 projecting from both ends, and the plurality of blades 23 are integrally fixed to the shaft portions 36 and 37 at both ends. Although the number of blades 23 in the present embodiment is eight, it is not limited to this and can be changed according to the application. A key 28 that can be fitted into a key groove (not shown) of the drive shaft 30 is inserted into one shaft portion 36 of the rotor 22.

The one opening 26a of the casing 21 can be opened and closed by a second side cover 39, and the second side cover 39 is fixed to the periphery of the opening 26a by eyebolts 39a. At the approximate center, a second bearing portion 40 that supports the other shaft portion 37 of the rotor 22 is provided.

In the second bearing portion 40, a ball bearing 42 is provided on the inner wall of a boss portion 41 provided substantially at the center of the second side cover 39, and the ball bearing 42 is externally fitted to the other shaft portion 37. The small-diameter portion of the stepped sleeve 43 is configured to be mounted.

A pressure contact member 44 for pressing the side surface of the ball bearing 42 is provided on the inner wall of the boss 41 into which the ball bearing 42 is inserted, and a lid 45 is bolted to an end of the boss 41. A fastening eyebolt 46 is screwed to the lid 45 so as to be movable in the axial direction of the shaft portion 37.

The shaft end of the tightening eyebolt 46 presses the end side wall surface of the cap-shaped pressing member 44, and the outer ring of the ball bearing 42 is formed by a ring-shaped edge formed on the other end of the pressing member 44. Is configured to be pressed.

That is, the fastening eye bolt 46 is a member for pressing the end face of the rotor 22 through the sleeve 43, and adjusts the axial position of the sleeve 43 from the outside to firmly attach the rotor 22 to the drive shaft 30. And fix it.

A seal member 47 is interposed between the stepped sleeve 43 and the large-diameter portion between the end face of the rotor 22 and the ball bearing 42 to prevent the leakage of the granular material from the valve chamber 21a. .

As shown in FIG. 2, a driven sprocket 48 is fixed to an end of the drive shaft 30 extending outward. An electric motor 50 is mounted on the casing 21 via a mounting bracket 49. A drive sprocket 51 is fixed to an output shaft of the electric motor 50, and a power transmission chain is connected between the drive sprocket 51 and the driven sprocket 48. 52 is stretched.

Next, the operation will be described.

When assembling the rotary valve 20, first, as shown in FIG. 3, the opening 26 b on the drive side surface of the casing 21 is closed with the first side cover 27, and the opening 26 b is inserted into the insertion hole 33 of the first side cover 27. After the seal member 34 is attached, the first bearing 29 is attached to the outside of the first side cover 27.

At the time of mounting the first bearing 29, the drive shaft 30 is previously supported on the first bearing 29. Therefore, when the first bearing portion 29 is attached to the outside of the first side cover 27, the other end of the drive shaft 30 is inserted through the gland packing 35 provided on the first side cover 27 side. The outer periphery of the other end of the drive shaft 30 is hermetically sealed by facing the drive side surface of the casing 21.

Next, the rotor 22 is inserted through the opening 26 a on the non-drive side, and is moved in the axial direction so that the shaft 36 with the dust seal 54 a of the rotor 22 is fitted into the fitting hole 32 at the other end of the drive shaft 30. The key 28 of the shaft 36 is fitted into a key groove (not shown). Here, when the shaft 36 is inserted, a hollow hole 38 serving as an oil supply storage chamber having an enlarged diameter is formed between the bottom surface of the fitting hole 32 and the end of the shaft 36.

As described above, the other end of the drive shaft 30 is provided with the fitting hole 32 for mounting the one shaft portion 36 of the rotor 22, so that when the rotor 22 is attached and detached, one end of the rotor 22 is removed. Since the shaft portion 36 does not slide on the sealing surface in the gland packing 35, the sealing surface of the gland packing 35 is not worn or damaged, and the airtight state on the drive shaft side can be maintained for a long time. it can.

A sealing portion 34 for sealing the outer periphery of the other shaft end of the drive shaft 30 is provided with a gland packing 35 in the insertion hole 33 of the first side cover 27, and a packing case 35 a pressed and held by a packing holder 35 b. Is detachably attached, the replacement of the ground packing 35 is facilitated, and the maintenance of the seal portion 34 can be improved.

Then, when the rotor 22 is inserted into the valve chamber, the stepped sleeve 43 is mounted on the other shaft portion 37 of the outer rotor 22 with the dust seal 54 b attached thereto, and the stepped sleeve 43 is placed on the rotor 22 side. A seal member 47 and a seal retainer 56 are inserted around the outer periphery, and these are fixed to the outer periphery of the sleeve 43 by a retaining ring 57. Then, the ball bearing 42 is mounted on the small diameter portion of the stepped sleeve 43.

Next, when the second side cover 39 is air-tightly fixed to the opening 26 a on the non-drive side via the seat packing 55 with the eye bolt 39 a, the pressure contact member 44 is inserted into the inner wall of the boss 41, and the ball bearing 42 is inserted. Then, the lid 45 is fixed to the end of the boss 41 via bolts B.

As described above, when a series of members such as the rotor 22 are installed, the outer ring side surface of the ball bearing 42 is pressed against the opening end of the pressing member 43 by turning the tightening bolt 46. The stepped sleeve 43 presses the rotor end face via the ball bearing 42.

As described above, since the outer ring of the ball bearing 42 is pressed against the opening end of the pressing member 43, a predetermined excess pressure can be applied to the ball bearing 42, and stable rotation can be obtained. .

Next, a predetermined amount of lubricating oil is supplied to a chamber 38 as an enlarged hollow hole configured as an oil supply chamber from an oil supply port 53 a formed at the casing side end of the drive shaft 30. When the oil is stored, the oil supply port 53a is sealed by a cap 53b.

As described above, since the oil is supplied from the oil supply port 53b into the fitting hole 32 in which the one shaft portion 36 of the rotor 22 is mounted, the inside of the mounting portion is not affected by the external environment, and the connection surface is long-term. Thus, the disassembling and assembling operations at the time of taking out and attaching the rotor 22 can be easily performed.

[0050]

[Effect of the invention]

 The present invention has the following effects.

(A) According to the first aspect of the present invention, the other end of the drive shaft is provided with a fitting hole for mounting one shaft portion of the rotor. Since one shaft portion of the rotor does not move on the seal surface of the seal portion, the seal surface is not worn or damaged, and the airtightness of the seal portion can be maintained for a long time. (B) According to the invention of claim 2, since the oil is supplied from the oil supply port to the fitting hole in which one shaft portion of the rotor is mounted, the inside of the mounting portion is not affected by the external environment, and the connection surface is long-term. Thus, the disassembling and assembling operations at the time of taking out and attaching the rotor can be performed smoothly.

(C) According to the third aspect of the present invention, since the oil is always stored in the gap, an oil film is formed on the contact portion, so that the oil is not corroded and the connection surface is protected for a long time. can do.

(D) According to the invention described in claim 4, the seal portion for sealing the outer periphery of the other shaft end of the drive shaft accommodates the gland packing in the insertion hole of the first side cover and presses the packing. Since the packing case pressed and held by the mounting is detachably mounted, the replacement of the ground packing is facilitated, and the maintenance of the seal portion can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary valve according to an embodiment of the present invention.

FIG. 2 is a plan view of the rotary valve according to the embodiment of the present invention.

FIG. 3 is an exploded view of the rotary valve according to the embodiment of the present invention;

FIG. 4 is a sectional view of a conventional rotary valve.

[Explanation of symbols]

 Reference Signs List 20 rotary valve 21 casing 21a valve chamber 22 rotor 24 upper transfer port 25 lower transfer port 26a opening 27 first side cover 29 first bearing 30 drive shaft 32 fitting hole 36 one shaft 37 other shaft 38 hollow Hole 39 Second side cover 40 Second bearing 43 Sleeve 44 Press-contact member

Claims (4)

[Utility model registration claims] 1. A rotor rotatably disposed in a valve chamber of a casing having upper and lower transport ports, for separating a predetermined amount of granular material supplied from an upper transport port and discharging the same from a lower transport port. A drive side surface is closed with a first side cover, a first bearing portion is disposed outside the first side cover, and an opening is provided on the other side surface of the casing to allow the rotor to enter and leave the valve chamber. A rotary valve including a second side cover that opens and closes the opening, wherein the first bearing portion rotatably supports a drive shaft and one shaft end extends outward. And the other shaft end is disposed so as to extend through the first side cover in an airtight manner to the vicinity of the rotor, and the rotor has one of shaft portions protruding from both sides on a center axis line of the drive shaft. Mating formed on the other end The other shaft portion, which is coaxially and detachably mounted on the shaft and is airtightly inserted through the second side cover, is supported by a second bearing portion, and the drive shaft has a fitting hole at the other shaft end. A rotary valve, wherein one of the shaft portions of the rotor is mounted in the fitting hole so as to be capable of transmitting rotation. 2. The drive shaft is provided with an oil supply port that can be opened and closed on the outer periphery of the other end of the drive shaft to supply oil to the fitting hole in which one shaft portion of the rotor is mounted. The rotary valve according to claim 1. 3. The drive shaft, wherein a liquid-tight gap is formed between one shaft end of the rotor mounted in the fitting hole and a bottom of the fitting hole, and the gap is formed by an oil reservoir. 3. The rotary valve according to claim 2, wherein the rotary valve is configured as a chamber. 4. A through hole is formed in said first side cover, and a seal portion for sealing the outer periphery of the other shaft end of said drive shaft is attached to said through hole, said seal portion comprising a gland packing and said gland. 2. The rotary valve according to claim 1, further comprising a packing case for storing a packing and being detachable from the insertion hole, and a packing presser for pressing a gland packing stored in the packing case in an axial direction.