JP2009174628A - Grease supplying and exhausting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grease supplying and exhausting device to apply to a counter-drive side shaft sealing part of a horizontally laid polymerization device, composed of simple components and capable of supplying a large quantity of grease while the vacuum environment is maintained. <P>SOLUTION: The grease supplying and exhausting device, installed at a grease draining port in the shaft sealing part of the counter-drive side of the polymerization device operated in the condition with its inside held in the vacuum environment, is equipped with a three way valve connected with the grease draining port, a grease nipple connected with the three way valve, and a valve means connected with the three way valve through a pipe and put in the sealed condition in association with the movement of the internally existing grease to the grease draining port, and is characterized by that the valve means is put in communication with the grease draining port through the three way valve in the condition that the grease is put fully in the pipe and the sealing means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to grease injection / discharge of a shaft seal portion on the non-drive side of a horizontal continuous polymerization apparatus.

  Conventionally, a horizontal continuous polymerization apparatus as disclosed in Japanese Patent Application Laid-Open No. 2004-10791 (Patent Document 1) has a rotating shaft 3a-a rotating shaft 3b and a rotating shaft 3c at each of both ends in the longitudinal direction of the horizontally long cylindrical container 1. -The rotary shaft 3d is penetrated and supported rotatably by the bearings 8 respectively. Each of the rotation shafts 3a and 3c is connected to a rotation driving device outside the container so as to be driven in reverse rotation in synchronization with each other. On the other hand, the rotation shafts 3b and 3d on the opposite drive side are rotatably supported by the bearing 8. A large number of stirring blades are attached to the rotating shaft, and the workpiece in the container 1 is stirred.

  The horizontally long cylindrical container 1 is approximately 10 m in length, and the rotating shaft is bent due to the weight of the rotating shaft itself and the weight of the stirring blade, and both ends of the rotating shaft are inclined. Since the inside of the container is agitated in a state close to vacuum, a shaft seal structure is required for the bearing. Conventionally, a mechanical seal is used as the shaft seal structure on the driving side, and the pressure in the container is maintained on the non-driving side. Therefore, the shaft end including the bearing is sealed. Further, when grease is supplied to or exchanged for the bearing of the shaft seal portion on the non-drive side, it is performed by a shaft seal device sealed remodeling grease supply device. This shaft seal device sealed remodeling grease supply device is attached to the shaft seal portion injection hole.

JP 2004-10791 A

  However, although the shaft seal device hermetically modified grease supply device can be replaced little by little while maintaining a vacuum environment, the amount that can be supplied at one time is small and the structure is complicated. In addition, when a mechanical seal structure is employed, the structure is particularly complicated in order to absorb the tilt of the rotating shaft, which is expensive and tends to cause problems with reliability.

  The present invention provides a device that can supply and discharge a large amount of grease while maintaining a vacuum environment at the shaft seal portion on the counter-drive side with a simple configuration.

  In order to solve the above-mentioned problems, the present invention provides a grease supply / discharge device provided in a grease drain port of a shaft seal portion on the counter-drive side of a polymerization apparatus that is operated in a vacuum environment, and is connected to the grease drain port in three directions. A valve, a grease nipple connected to the three-way valve, and valve means connected to the three-way valve via a pipe to be sealed when the internal grease moves to the grease drain port side. The valve means and the grease drain port are communicated with each other by the three-way valve in a state where the means is filled with grease.

  The valve means includes a seal seat, an O-ring provided on the bottom of the seal seat, a steel ball placed on the O-ring, an acrylic case that is attached to the seal seat and prevents grease from spreading, It consists of a cover with a grease discharge port that covers the acrylic case, and the steel ball comes into close contact with the seal seat as the internal grease moves from the valve means to the grease drain port side, and the grease moves in the opposite direction. Thus, the adhesion between the steel ball and the seal seat is released.

  The acrylic case for preventing the diffusion of grease is transparent so that the state of the grease can be visually confirmed and the completion of replacement can be easily determined.

According to the grease supply / discharge device of the present invention, a large amount of grease can be supplied / discharged with a simple component while maintaining the vacuum environment of the shaft seal portion on the non-drive side.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a polymerization apparatus, 1 is a horizontally long cylindrical container, 2 is a drive unit for rotating a rotary shaft 3, and comprises a motor 2a installed below and a speed reducer 2b installed above it. . Reference numeral 4 denotes a driving-side bearing portion, and reference numeral 5 denotes a non-driving-side shaft seal portion, which is enlarged and shown in FIG.

  In FIG. 2, 6 is a bearing provided at the tip of the rotary shaft 3, 7 is a bearing box that covers the outside of the bearing 6, 8 is a bearing cover that covers the tip of the bearing box, and 9 is grease injection provided in the bearing box 7. It is a hole. The grease injection hole 9 has a grease gun connection structure at the tip, and grease is injected once / monthly. Reference numeral 14 denotes a grease drain port communicating with the bearing 6, and reference numeral 10 denotes a grease supply / discharge device 10 attached to the grease drain port 14.

  FIG. 3 is a detailed cross-sectional view of the grease supply / discharge device 10, which is shown in the opposite direction to FIG. 2. In the figure, 12 is a three-way ball valve for switching and connecting three sides, 11 is a pipe connected to the three-way ball valve 12, 18 is a steel ball seal seat to which the other end of the pipe 11 is connected, 13 is a seal seat 18 An O-ring provided on the bottom of the steel plate, 17 is a steel ball placed on the O-ring 13, 15 is a cylindrical transparent acrylic case mounted on the seal seat 18, and 16 is an acrylic case. An acrylic cover that covers the open end, 21 is a grease discharge port provided in the acrylic cover, and 20 is a grease nipple connected to the tip of the three-way ball valve 12.

  The seal seat 18, the O-ring 13, the steel ball 17, the acrylic case 15, the acrylic cover 16, and the grease discharge port 21 constitute valve means, and the steel ball 17 is moved along with the movement of the internal grease toward the grease drain port 14. The check valve functions so that the steel ball and the seal seat are brought into close contact with the O-ring 13 in close contact with the grease movement in the opposite direction.

  The grease supply / discharge device 10 having the above-described configuration is used by being attached to the grease drain port 14. In the state of use, the grease is filled therein, and the filling is performed as follows. The bearing 6 is filled with grease.

  By switching the three-way ball valve 12, the grease nipple 20 and the pipe 11 are brought into communication. At this time, the grease drain port 14 is closed. Pre-prepared grease is poured from the grease nipple 20 and filled until the steel ball seal seat 18 overflows. The excess grease is wiped up to the O-ring 13, a steel ball 17 is placed on the O-ring 13, and the acrylic case 15 and the acrylic cover 16 are attached to the steel ball seal seat 18. When the pipe 11 becomes negative pressure in the above state, the O-ring 13 and the steel ball 17 are in a sealed state, and the inside of the pipe 11 can be kept in a vacuum environment.

  Next, the three-way ball valve 12 is operated to switch the communication state between the grease nipple 20 and the pipe 11 to the communication state between the grease drain port 14 and the pipe 11. Due to this switching, the inside of the shaft seal portion 5 on the counter drive side is in a vacuum environment, so that the grease in the pipe 11 is sucked into the drain port 14 side, and the O-ring 13 and the steel ball 17 are brought into close contact with each other due to the pressure difference. In this state, normal operation of the polymerization apparatus is performed.

  When supplying and discharging grease once every several months, the grease is injected by applying pressure from the grease injection hole 9. The injected grease enters the bearing 6 and pushes out the filled old grease. The extruded old grease passes through the pipe 11 from the grease drain port 14, pushes up the steel ball 17, fills the acrylic cover 16, and is appropriately discharged from the discharge port 21. At that time, the grease filled in the transparent acrylic case 15 can be visually checked, and it can be easily determined whether or not the replacement of the grease is completed while checking the state of the grease. When grease of the same color as the injected grease comes out, the replacement is completed.

  Thereafter, when the grease gun is removed from the grease injection port 9, the injection port 9 is automatically closed, and the O-ring 13 and the steel ball 17 are sealed by the vacuum environment inside the shaft seal 5 (inside the bearing). Maintain a vacuum environment.

  As described above, according to the present embodiment, a very simple structure can supply and discharge a large amount of grease while maintaining the vacuum environment of the shaft seal portion, and can be easily replaced.

The side view of the superposition | polymerization apparatus used for this invention Example. The expanded sectional view of the shaft seal part of the non-driving side of the example of the present invention. Detailed sectional drawing of the grease supply / discharge apparatus of the Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Shaft seal part on the non-driving side, 9 ... Grease injection port, 10 ... Grease supply / discharge device, 11 ... Pipe, 12 ... Three-way ball valve, 13 ... O-ring, 14 ... Grease drain port, 15 ... Acrylic case, 16 Acrylic cover, 17 ... steel ball, 18 ... steel ball seal seat, 20 ... grease nipple, 21 ... grease outlet.

Claims (3)

In the grease supply / discharge device provided in the grease drain port of the shaft seal part on the non-drive side of the polymerization apparatus operated inside in a vacuum environment,
A three-way valve connected to the grease drain port, a grease nipple connected to the three-way valve, and a valve that is connected to the three-way valve via a pipe and becomes sealed as the internal grease moves to the grease drain port side A grease supply / discharge device comprising: means, wherein the valve means and the grease drain port are communicated with each other by the three-way valve in a state where the pipe and the sealing means are filled with grease.   The valve means includes a seal seat, an O-ring provided at the bottom of the seal seat, a steel ball placed on the O-ring, an acrylic case attached to the seal seat to prevent grease from spreading, and the acrylic It consists of a cover with a grease discharge port that covers the case, the steel ball comes into close contact with the seal seat as the internal grease moves from the valve means to the grease drain port side, and the grease moves in the opposite direction as the grease moves. 2. The grease supply / discharge device according to claim 1, wherein the adhesion between the steel ball and the seal seat is released.   The grease supply / discharge device according to claim 2, wherein the acrylic case for preventing the diffusion of grease is transparent so that the state of the grease can be visually confirmed and the completion of the replacement can be easily determined.

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