JPH0595935U - Rotary valve - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a rotary valve that has a very high viscosity and is capable of discharging a fluid that easily adheres to the blades of a rotor. [Structure] In a cylindrical case 10 formed so that the inlet 16 and the outlet 17 are opposed to each other at two positions on the peripheral surface, the rotor 11 is partially covered by the case 1
It is eccentrically attached so as to be in contact with the inner peripheral surface of 0 and is rotatably provided. The blades 12 are arranged on the rotor 11 at equal intervals in the circumferential direction, and the blades 12 are provided so as to be able to advance and retreat in the radial direction with respect to the rotor 11, and are always projected by a spring 34. Then, the rotor 11 is rotated in a direction in which the blades 12 sequentially project from the rotor 11 when each blade 12 passes through the fluid inlet 16 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary valve for quantitatively discharging powdery or viscous fluids while maintaining a pressure difference between an inflow side and an exhaust side.

[0002]

[Prior Art]

 When discharging fluids or powders with viscosity such as sludge from storage tanks, etc., pressure is applied to the storage tank to discharge. For this reason, a rotary valve is installed in the middle of the discharge suction pipe to discharge the rotary valve quantitatively while maintaining the pressure difference between the inlet side and the outlet side.

As shown in FIG. 6, a conventionally used rotary valve (1) has a cylindrical case (4) formed on its peripheral surface with an inlet (2) and an outlet (3) facing each other. A rotor (6) having a plurality of blades (5) (5) ... Equipped on the peripheral surface at equal intervals is rotatably provided therein, and the rotor (6) is rotated by an appropriate driving means (not shown). It has a structure that allows it.

The rotary valve (1) rotates the rotor (6) to move sludge or powder sent to the inflow port (2) into a space partitioned by the blades (5) (5). Then, it is stored and sent, and discharged from the discharge port (3).

Since the volume of the space partitioned by the blades (5) and (5) of the rotor (6) is constant, the rotary valve (1) can discharge a fixed amount and each blade (5) Since the end surface of (5) contacts and seals the inner peripheral surface of the case (4), the inflow side and the discharge side of the rotary valve (1) do not communicate directly with each other, and the pressure on the inflow side is maintained.

[0006]

[Problems to be solved by the device]

 Since the conventional rotary valve (1) does not have a self-suction action, it is difficult for sludge or powder to enter the spaces of the rotor (6) from the inlet (2), and the rotation speed of the rotor (6) cannot be increased. Therefore, the processing speed was slow.

When a highly viscous fluid is flowed, the fluid adheres to the surfaces of the blades (5) and the rotor (6), and some remain without being discharged, which causes fluctuations in the discharge amount. However, a large amount of residue was accumulated and it became impossible to discharge, and the processing capacity was low.

The present invention is intended to provide a rotary valve that can reliably discharge even a highly viscous fluid and has a high discharge speed.

[0009]

[Means for Solving the Problems]

 The rotary valve of the present invention has a cylindrical case formed by facing an inlet and an outlet opened at two positions on the peripheral surface over the entire length, and one part of the peripheral surface is the inner peripheral surface of the case. And a rotor rotatably supported by being eccentrically mounted in the case so as to come into contact with the case, having the same length as the opening length of the inlet and the outlet of the case, and arranged at equal intervals on the circumferential surface of the rotor. , And a plurality of blades mounted so as to be able to move forward and backward in the radial direction of the rotor, a plurality of springs that are compressed and interposed between the rotor and each of the blades to constantly project each of the blades, and the rotor is rotated. And a drive mechanism.

[0010]

[Action]

 The rotary valve configured as described above is rotated so that the blades provided on the rotor are sequentially projected from the rotor when passing through the inlet formed in the case, and the fluid and powder are discharged in a fixed amount. Then, when the fluid is discharged, the space between the rotor and the case is gradually narrowed, and the blades provided on the rotor are pushed by the inner peripheral surface of the case to retract into the rotor. The fluids that are carried in are pushed out aggressively, and even if there is something adhering to the blades, they will be scraped off when you move in and all will be discharged. Further, on the inflow side, the space between the rotor and the case sequentially expands and a suction force is generated, so that the inflow of a fluid or the like is fast and the rotor can be rotated quickly.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the rotary valve basically rotates the rotor (11) eccentrically in the cylindrical case (10) to rotate the case (10) on the inflow side of a fluid or the like. The space between the rotor (11) and the rotor (11) is widened, and the space between the case (10) and the rotor (11) is narrowed on the discharge side. ) (12) ... Can be moved back and forth with respect to the rotor (11), and the blade (12) is moved into and out of the rotor (1) at the time of discharging the fluid or the like, and the fluid attached to the blade (12). It is designed to be scraped off and discharged.

As shown in FIGS. 2 to 4, in the rotary valve case (10), both ends of a cylindrical case body (13) are closed by lids (14) and (15). The outlet (16) and the outlet (17) are formed to face each other on the peripheral surface of (1). Both the inlet port (16) and the outlet port (17) have a width dimension of about ¼ circumference, and are opened in a rectangular shape over substantially the entire length, centering on the central axis of the case body (13). The points are symmetrically arranged. A plurality of arc-shaped guides (20) and (21) are formed in the inflow port (16) and the discharge port (17) in the circumferential direction to prevent the blades (12) from popping out.

The rotor (11) has a hollow structure, and a mounting hole (22) is formed in the center of the rotor (11) along the axial direction, and radially extending storage grooves (23) (23) at four circumferential positions. Are formed in a cross shape and over the entire length. The rotor (11) is eccentrically arranged so that a part of the peripheral surface is in contact with the inner peripheral surface of the case body (13), and both ends of the rotary shaft (24) fixed through the mounting hole (22) are fixed. , Is projected from the lids (14) and (15) provided on the case (10) and is rotatably supported by bearings (25) and (26) attached to the lids (14) and (15). Further, disk-shaped positioning plates (27) (28) for positioning the blades (12) in the axial direction are attached to both ends of the rotor (11), and the lids (14) (15) of the case (10) are respectively attached. ) Are housed in the recesses (30) and (31) formed in (). Further, O-rings (32) and (33) are attached to the inner peripheral surfaces of the lids (14) and (15) and the outer peripheral surfaces of the positioning plates (27) and (28), respectively.

The vanes (12) are sized to fit completely within the receiving groove (23) of the rotor (11). Further, spring holes (32), (32) and (32) are formed in the radial direction from the inner end face side at three positions in the longitudinal direction of the blade (12). The blades (12) are slidably accommodated in the respective accommodation grooves (23) (23) of the rotor (11), and the respective spring holes (32) (32) (32) are attached to the rotary shaft (24). ) Is covered with round bar-shaped spring guides (33) (33) ... Then, while being guided by the spring guides (33) (33), the springs compressed between the rotary shaft (24) and the spring holes (32) (32) of the blades (12) (12). , The blades (12), (12), ... Are constantly pressed against the inner peripheral surface of the case body (13).

Further, as shown in FIG. 5, rotary seal members (35) and (35) are rotatably mounted on both sides of the inlets of the housing grooves (23) (23) ... Of the rotor (11). The rotary seal members (35) (35) prevent fluids and the like from getting caught between the blade (12) and the housing groove (23). The rotary seal members (35) (35) have the same length as the blades (12), the mounting surface for the rotor (11) is formed in a semicircular shape, and the mounting surface for the blades (12) is a gentle arc. It is formed on the surface, the outer corner portion (35a) is formed into an acute angle, and the inner corner portion (35b) is formed into a round shape. When the blade (12) projects, the resistance is small, and the blade (12) When retreating, the sharp corners (35a) hit the blades (12) and scrape off the fluid and the like adhering to the blades (12).

The drive mechanism (36) for rotating the rotor (11) has, for example, a sprocket wheel (37) attached to one end of a rotating shaft (24) attached to the rotor (11), and a drive mechanism (36) of the case (10). The sprocket wheel (41) attached to the output shaft of the motor (40) with a reducer provided on the side is connected by a chain (42), and the rotary shaft is connected with the motor (40) with a reducer. The rotor (11) is rotated by rotating (24). The direction of rotation of the rotor (11) is such that when the blade (12) provided on the rotor (11) passes through the inflow port (16), the blade (12) projects, and when it passes through the discharge port (17), the blade ( 12) Rotate it in the direction in which it retreats.

If necessary, magnets (43) (43) are embedded in guides (20) (20) provided at the inflow port (16) of the case body (13) so that iron powder is contained in the fluid. If it is included, it is adsorbed to prevent the blade (12) and the case body (13) from being caught. The adsorbed iron powder can be removed by appropriately opening the inspection port (44) provided at the inflow port (16).

When the rotary valve is used, the rotary shaft (24) and the rotor (11) are rotated by the motor (40) with a speed reducer, and the fluid or powder entering from the inflow port (16) is transferred to the rotor. It is carried by the blades (12), (12) ... Provided in (11) and discharged from the discharge port (17).

On the inflow side of the rotary valve, the space between the rotor (11) and the case (10) gradually becomes wider, so that a suction force is generated and fluid or powder rapidly flows in. On the discharge side, the space between the rotor (11) and the case (10) is gradually narrowed, and the fluid or powder is positively pushed and discharged on the peripheral surface of the rotor (11). Further, even if fluids or the like adhere to the blades (12), they are scraped off and discharged when the blades (12) enter the rotor (11), so that they remain in the case (0). There is no.

Further, the blades (12), (12), ... Are constantly pressed by the springs (34), (34), and are pressed against the inner peripheral surface of the case body (13). The pressure difference is maintained without direct communication.

[0022]

EFFECTS OF THE INVENTION According to the present invention, even if a fluid or the like adheres to the blades provided on the rotor, it is scraped and discharged at the time of discharge. The total amount can be discharged without remaining in the tank and the processing capacity can be greatly improved. Also, suction force is generated on the inflow side to allow fluids and the like to flow in quickly, so that the rotor can rotate faster and the processing speed can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a rotary valve of the present invention.

FIG. 2 is a front view of the rotary valve of the present invention.

FIG. 3 is a plan view of the rotary valve of the present invention.

FIG. 4 is a vertical sectional side view of the rotary valve of the present invention.

FIG. 5 is a partially enlarged sectional view showing a seal structure between a rotor and a blade in the present invention.

FIG. 6 is a sectional view showing a schematic configuration of a conventional rotary valve.

[Explanation of symbols]

 10 Case 11 Rotor 12 Blade 16 Inlet 17 Discharge Port 34 Spring 36 Drive Mechanism

Claims (1)

[Scope of utility model registration request] 1. A cylindrical case formed by facing an inflow port and a discharge port opened over the entire length at two locations on the peripheral surface, and one location on the peripheral surface contacts the inner peripheral surface of the case. As described above, the rotor is eccentrically rotatably supported in the case, has the same length as the opening length of the inlet and the outlet of the case, and is arranged at equal intervals on the peripheral surface of the rotor, and A plurality of blades mounted to move freely in the radial direction of the rotor,
A rotary valve comprising: a plurality of springs, which are provided between the rotor and the respective blades in a compressed state so as to constantly project the respective blades, and a drive mechanism for rotating the rotor.