JP3324175B2 - Solid-liquid separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid separation device.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. 57-4250 discloses a centrifugal concentrator. This centrifugal concentrator is provided with a flow path for supplying a suspension to be processed to a rotary cylindrical body for concentration, and a flow path for discharging a separated liquid collected on the rotation shaft core side. . Then, in order to recover the concentrate without interrupting the supply of the suspension, the pipe for sucking the concentrate accumulated on the inner wall of the rotary cylinder is in a state in which the pipe can be differentially rotated with respect to the rotary cylinder. And a suction pump is connected to the pipe.

[0003]

However, the centrifugal concentrator is provided with a suction pump in which a pipe for sucking the concentrate is installed so as not to interfere with the rotary cylindrical body and to be rotatable differentially with respect to its rotation. , And there is a problem that the overall configuration becomes complicated and expensive. The present invention has been made in order to solve the above problems, and has as its object to provide an inexpensive solid-liquid separation device.

[0004]

[0005]

Means for Solving the Problems To achieve the above object,
The solid-liquid separation device of the present invention has a solid-liquid separation tank rotatably supported in a closed structure, a slide valve pressed and closed by an elastic member, and a pressurizing mechanism for increasing the internal pressure of the solid-liquid separation tank. After the solid-liquid separation by rotation of the solid-liquid separation tank, the internal pressure of the solid-liquid separation tank is increased by the pressurizing mechanism to open the slide valve against the pressing elasticity of the elastic member. The separated solid matter is discharged outside the solid-liquid separation tank.

[0006]

[0007]

According to the above solid-liquid separator, the elastic sliding valve close pressed by members, increase the internal pressure of the solid-liquid separation tank in which a closed structure by the pressure mechanism, against the pressing elastic force of the elastic member The valve is opened and the separated solid matter is discharged out of the solid-liquid separation tank.

[0008]

【Example】

(First Embodiment) A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view of a solid-liquid separation device. This solid-liquid separation device is for separating metal chips mixed with lubricating oil of a machine tool as sludge by centrifugal force and repeatedly using the lubricating oil. A lower plate 3 is fixed to a support 2 erected on a lubricating oil recovery tank 1, and an upper plate 4 is fixed to an upper end of the support 2. Bearing mounting holes 5 and 6 are formed in the lower plate 3 and the upper plate 4 so that the bearing mounting holes 5 correspond to the recovery ports 7 formed in the recovery tank 1. A lower bearing 8 with a bearing fitted therein is mounted in the bearing mounting hole 5, and an upper bearing 9 with a bearing fitted in the bearing mounting hole 6.
Attach.

The solid-liquid separation tank 10 has a lower tube shaft 11 and an upper tube shaft 12 whose central axes (c) are aligned. The lower tube shaft 11 is supported by the lower bearing 8 and the upper tube shaft 12 is supported by the upper bearing 9.
The solid-liquid separation tank 10 is rotatably supported between the lower plate 3 and the upper plate 4. A lid 13 having an outflow port 13 a is fitted into the lower tube shaft portion 11 so as to face the recovery port 7 of the recovery tank 1. A lid 14 having an inflow port 14a is fitted to the upper pipe shaft portion 12 protruding from the upper plate 4, and a pulley 15 is fitted to the upper pipe shaft portion 12, and a belt 16 is hung thereon and driven to rotate by a motor (not shown). Then, the lubricating oil (p), which is pressure-fed from a pressure pump 18 via a pipe 17 facing the inflow port 14 a of the lid 14, is continuously supplied from above the baffle plate 19 provided in the solid-liquid separation tank 10. Solid-liquid separation tank 10
A plurality of slide valve mechanisms 21 that operate in a direction orthogonal to the central axis (c) are provided at substantially equal angular intervals on the tank wall 10a. Further, sludge (s) discharged from the slide valve mechanism 21 around the solid-liquid separation tank 10
The collection gutter 20 which collects is provided.

FIG. 2 is an enlarged view of the slide valve mechanism 21. The holder 22 is mounted in a liquid-tight manner with a bolt 22a in a radial mounting hole 10b formed in a tank wall 10a of the solid-liquid separation tank 10. A slider sliding hole 23 penetrating the center and a disc spring mounting hole 24 are connected to the holder 22 by a step 25. A slider 26 is slidably fitted into the slider sliding hole 23, and the flange 2 of the slider 26 is
Reference numeral 7 corresponds to the step 25. The slider 26 has a valve insertion hole 28 formed at the center. The valve insertion hole 28
From the inside to the outside of the solid-liquid separation tank 10, a sludge delivery hole 29, a valve seat 30 having a tapered surface by continuously increasing the diameter of the sludge delivery hole 29, a horizontal hole 31 and the horizontal hole 31. And an enlarged diameter hole 32 continuous with the
Is formed with a female screw 33.

A valve body 34 inserted into the valve insertion hole 28
Is a valve 35 having an outer diameter smaller than the diameter of the horizontal hole 31 and having a tip conically pointed so as to be in close contact with the tapered surface of the valve seat 30. It is formed from a diameter-reducing rod portion 37 that is continuous by a tapered surface 36 that reduces the diameter. A male screw 38 is formed in the reduced diameter rod portion 37. Then, the reduced-diameter rod portion 37 is loosely fitted into the center hole 40 of the pressing ring 39 fitted into the enlarged diameter hole 32 of the valve insertion hole 28. The pressing ring 39 has a tapered surface 41 with which the tapered surface 36 formed on the valve body 34 is in close contact. The fixing nut 42 is loosely fitted to the reduced-diameter rod portion 37 from the outside of the holding ring 39 and screwed into the female screw 33 of the enlarged-diameter hole 32 to fix the holding ring 39.

A plurality of disc springs 43 are alternately mounted in the disc spring mounting holes 24 of the holder 22. And
A lid 45 fixed to the holder 22 with bolts 44 closes the disc spring mounting hole 24 and compresses the disc spring 43 that contacts the flange 27 of the slider 26. The rear end of the slider 26 is slidably inserted into the insertion portion 46 formed on the lid 45. Then, the male screw 38 of the reduced diameter rod portion 37 is inserted into the center of the lid 45 and fixed by the nut 43. Thereby, the valve element 34 is held horizontally at the center of the valve insertion hole 28,
Between the outer periphery of the valve 35 and the horizontal hole 31, the outer periphery of the reduced diameter rod portion 37, the center hole 40 of the holding ring 39 and the fixing nut 42
Gaps (x), (y), and (z) in which the sludge (s) can move are formed between the inner circumference and the inner circumference of the inner wall. In addition, lid 4
In FIG. 5, four sludge discharge holes 47 are formed at equal angular intervals as shown in FIG.

The operation of the solid-liquid separator having the above-described structure will be described below. The lubricating oil mixed with the metal swarf is supplied to the solid-liquid separation tank 10 by the pressure pump 18, and 3000 r. p. The solid-liquid separation is performed by rotating at a rotation speed of about m. In this case, the spring elasticity of the disc spring 43 and the centrifugal force due to the rotation of the solid-liquid separation tank 10 act on the slider 26 in opposite directions. 3000r. p. At a rotational speed of about m, the spring constant of the disc spring 43 is set so that the centrifugal force does not become larger than the spring elasticity of the disc spring 43. For this reason, the slider 26 is pressed toward the center of the solid-liquid separation tank 10, and the tapered surface 41 of the holding ring 39 is pressed.
Is in close contact with the tapered surface 36 of the valve body 34 and the valve seat 3
0 and the tip of the valve 35 are separated to open the sludge delivery hole 29,
It communicates with the gap (x) between the valve 35 and the horizontal hole 31.

By the solid-liquid separation by centrifugal force, the metal chips in the lubricating oil become sludge (s) and accumulate in the gap (x) between the valve 35 and the horizontal hole 31 from the sludge delivery hole 29.
Thereafter, the rotation speed of the solid-liquid separation tank 10 is further increased, and the centrifugal force acting on the slider 26 is made larger than the spring elasticity of the disc spring 43. Then, as shown in FIG. 4, the slider 26 moves against the spring resilience, the tip of the valve seat 30 and the valve 35 come into close contact with each other to close the sludge delivery hole 29, and the tapered surface 41 of the press ring 39 becomes the valve body. 34 away from the tapered surface 36. As a result, the gap (x) between the valve 35 and the horizontal hole 31, the gap (y) between the outer periphery of the reduced diameter rod portion 37 and the center hole 40 of the pressing ring 39, and the gap (z) between the inner periphery of the fixed nut 42. ) Communicate with the sludge discharge hole 47. For this reason, only the sludge (s) accumulated in the gap (x) is reduced to the gap (y),
(Z) to move from the sludge discharge hole 47 to the solid-liquid separation tank 1
0 and is collected by the collection gutter 20. During this time, solid-liquid separation is continued in the solid-liquid separation tank 10.

After the discharge of the sludge (s) accumulated in the gap (x) is completed, the rotation speed of the solid-liquid separation tank 10 is reduced to the original rotation speed of 3000 rpm. p. m, the spring elasticity of the disc spring 43 exceeds the centrifugal force again, and the slider 26 moves toward the center of the solid-liquid separation tank 10 to open the sludge delivery hole 29 and the tapered surface 41 of the holding ring 39. Is the valve body 34
In close contact with the tapered surface 36. Therefore, solid-liquid separation can be performed continuously by increasing or decreasing the rotation speed of the solid-liquid separation tank 10 at a constant cycle. Moreover, only the separated sludge (s) can be discharged.

(Second Embodiment) As shown in FIG. 5, the solid-liquid separator of the second embodiment basically adopts the structure of the first embodiment, and has the same components as those of the first embodiment. There are many. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. Lower pipe shaft part 5 of solid-liquid separation tank 50
1 and the opening at the end of the upper tube shaft 52 are closed by a housing 53 integrally formed with the lower plate 3 and a housing 54 integrally formed with the upper plate 4, so that the solid-liquid separation tank 50 is completely sealed.

Pipe 55 for lubricating oil pressure of pressure pump 18
To the inflow port 53a formed in the housing 53,
Lubricating oil (p) is supplied from the lower pipe shaft portion 51 to the solid-liquid separation tank 50. A pipe 57 for collecting the lubricating oil (p) and returning it to the collection tank 56 is connected to an outlet 54 a formed in the housing 54. The solenoid valve 5 is connected to the pipe 57.
8 is interposed.

As in the first embodiment, the pressure pump 18
The lubricating oil (p) mixed with the metal chips is supplied to the solid-liquid separation tank 50 by the
00r. p. The solid-liquid separation is performed by rotating at a rotation speed of about m. The slider 26 has a spring elasticity of the disc spring 43,
The centrifugal force due to the rotation of the solid-liquid separation tank 50 and the pressure for feeding the lubricating oil (p) act in opposite directions, but the spring constant of the disc spring 43 is set so that the spring elasticity of the disc spring 43 exceeds. . For this reason, the slider 26 is pressed toward the center of the solid-liquid separation tank 50, and the sludge (s) is accumulated in the gap (x) between the valve 35 and the horizontal hole 31 from the opened sludge delivery hole 29. Since the electromagnetic on-off valve 57 of the pipe 56 remains open, the lubricating oil from which the sludge (s) has been separated continuously returns to the recovery tank 56.

During the solid-liquid separation operation, the solenoid on-off valve 5
8 is closed to shut off the pipe 57. Due to the water hammer effect caused by this interruption, the internal pressure of the solid-liquid separation tank 50 instantaneously increases, and reaches several to several tens times the lubricating oil pressure. The increased internal pressure acts to move the slider 26 overcoming the spring elasticity of the disc spring 43 to close the sludge delivery hole 29, and the tapered surface 41 of the holding ring 39 is separated from the tapered surface 36 of the valve body 34. Thereby, only the sludge (s) accumulated in the gap (x) between the valve 35 and the horizontal hole 31 is
The liquid is moved through the gaps (y) and (z) by centrifugal force and discharged from the sludge discharge hole 47 to the outside of the solid-liquid separation tank 50. The shut-off time of the pipe 57 by the electromagnetic on-off valve 58 is about 0.5 to 1.0 second, and when the electromagnetic on-off valve 58 is opened, the recovery of the lubricating oil (p) is restarted.

The above-described solid-liquid separation device includes an electromagnetic on-off valve 58.
Is opened and closed, the sludge (s) accumulated in the solid-liquid separation tank 50 can be discharged while the solid-liquid separation is continued with the rotation speed of the solid-liquid separation tank 50 kept constant. Setting and control become easy. In each of the above embodiments, an elastic body such as a coil spring or rubber may be used instead of the disc spring for applying a pressing force to the slider 26.

[0021]

The present invention has the above-mentioned structure, and does not require a suction pipe or a suction pump for discharging the separated solid matter, so that the solid matter separated while continuing the solid-liquid separation can be obtained. A solid-liquid separation device that can be discharged out of the solid-liquid separation tank can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a solid-liquid separation device of a first embodiment.

FIG. 2 is an enlarged sectional view showing a slide valve mechanism.

FIG. 3 is a front view of a sludge discharge hole.

FIG. 4 is an enlarged sectional view showing the slide valve mechanism in a sludge discharging state.

FIG. 5 is a schematic sectional view of a solid-liquid separation device according to a second embodiment.

[Explanation of symbols]

 10, 50 ... solid-liquid separation tank 18 ... pressure pump 21 ... slide valve mechanism 22 ... holder 26 ... slider 29 ... sludge delivery hole 30 ... valve seat 34 ... Valve element 35 ... Valve 36,41 ... Tapered surface 43 ... Belleville spring 47 ... Sludge discharge hole 53,54 ... Housing 58 ... Electromagnetic on-off valve (s) ... Sludge

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-4251 (JP, A) JP-A-57-4250 (JP, A) JP-A-49-135271 (JP, A) 102963 (JP, U) Fully open 53-126078 (JP, U) Fully open 51-118175 (JP, U) Fully open 60-119946 (JP, U) Fully open 49-126967 (JP, U) JP-B-52-7598 (JP, B1) JP-B-27-8977 (JP, Y1) JP-B-38-21092 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B04B 1/16

Claims (1)

(57) [Claims] 1. A solid-liquid separation tank rotatably supported having a sealed structure, a slide valve pressed and closed by an elastic member, and a pressurizing mechanism for increasing the internal pressure of the solid-liquid separation tank are provided. After the solid-liquid separation by the rotation of the liquid separation tank, the slide valve is opened against the pressing elasticity of the elastic member by increasing the internal pressure of the solid-liquid separation tank by the pressurizing mechanism. A solid-liquid separation device wherein the material is discharged out of the solid-liquid separation tank.