Automatic shaft pressure control device for PC centrifugal machine

Abstract

The utility model relates to an automatic shaft pressure control device for a PC centrifugal machine, which comprises a pipeline connected with the inside of the centrifugal machine, one end of the pipeline is fixedly connected with a connecting pipe, one end of the connecting pipe is fixedly communicated with a concave seat, the top of the concave seat is fixedly connected with a top seat, one side of the bottom of the concave seat is fixedly communicated with an exhaust pipe, and a ring seat is fixedly connected in the concave seat. A stepped ring is fixedly connected to the inner wall of the ring seat, and a plurality of limiting grooves arranged in an annular array are formed in the bottom of the top seat. By moving the L-shaped plate, the valve plate and the diaphragm upwards, the diaphragm is separated from the stepped ring, the valve plate is separated from the ring seat, and therefore nitrogen can enter a gap between the valve plate and the ring seat through the connecting pipe and is exhausted through the exhaust pipe, the effect of large-flow pressure reduction is achieved, and when the pressure is reduced to be close to kpa, the valve plate moves downwards, so that the pressure is reduced. The valve plate is inserted into the ring seat, and the diaphragm is not in contact with the step ring, so that small-flow pressure relief can be conveniently carried out through the concave hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen pressure reduction control technology especially a shaft pressure automatic control device for PC centrifuge. BACKGROUND

[0002] The current PC plastic disc type centrifuge can quickly and continuously separate solid-liquid and liquid-liquid, and is a kind of vertical centrifuge, the drum is installed on the upper end of the vertical shaft, and is driven by the motor through the transmission device to rotate at high speed, so that the liquid material is separated from the heavy phase and the light phase in the disc, the original process design centrifuge motor drive shaft seal adopts direct pipe network nitrogen pressure reduction mode sealing to prevent the material in the centrifuge from being reversed and leaking, however, the system pipe network nitrogen pressure is 0.6MPA, and is directly reduced to 20kpa, since the existing pipe network nitrogen pressure reduction control device is not easy to control, it is inconvenient to meet the requirements of centrifuge shaft seal, and the shaft seal of the centrifuge is often damaged, so the centrifuge has to be stopped for maintenance, causing the device to reduce load or stop. SUMMARY

[0003] The utility model discloses a kind of shaft pressure automatic control devices for PC centrifuge, to solve the problem that the existing pipe network nitrogen pressure reduction control device is not easy to control, it is inconvenient to meet the requirements of centrifuge shaft seal.

[0004] To solve the above problems, the utility model provides a kind of shaft pressure automatic control device for PC centrifuge, including the pipeline being connected with centrifuge interior, one end of pipeline is fixedly connected with connector, one end of connector is fixedly communicated with recess, the top of recess is fixedly connected with top seat, the bottom of recess is fixedly communicated with exhaust pipe on one side, recess is fixedly connected with ring seat in, the inner wall of ring seat is fixedly connected with ladder ring, the bottom of top seat is equipped with the multiple limit slot being arranged in ring array, the L-shaped plate of being movable up and down is slidably connected in limit slot, the bottom of multiple L-shaped plates is fixedly connected with the valve plate of circular and is projected in top seat, the bottom of valve plate is fixedly connected with diaphragm, diaphragm can be contacted with the upper surface of ladder ring, valve plate is slidably connected with ring seat, the edge of valve plate is equipped with the multiple recess hole being arranged in ring array, connector is located above ladder ring, exhaust pipe is located below ladder ring.

[0005] The utility model provides a kind of shaft pressure automatic control device for PC centrifuge also has the following technical features:

[0006] Further, the center of the top seat is threadedly connected with a stud, the bottom of the stud can contact the upper side of the valve plate, and the stepped surface of the L-shaped plate is connected to the top seat by a spring.

[0007] Further, the top of the stud is provided with a polygonal slot, and a polygonal column is slidably connected in the polygonal slot.

[0008] Further, the outer side of the top base is fixed with a cover, the cover is fixed with a support, the top of the support is fixed with a support plate, the middle of the upper side of the support plate is fixedly installed with a motor, and the output end of the motor penetrates through the support plate and is fixedly connected with the top of the polygonal column.

[0009] Further, the bottom of the concave base is provided with a protective shell, the top of the protective shell is connected with the cover through bolts, the free end of the connecting pipe penetrates through one side of the protective shell, and the free end of the exhaust pipe penetrates through the other side of the protective shell.

[0010] Further, the support plate is fixedly installed with a protective cover, and the motor is located in the interior of the protective cover.

[0011] The device is connected with a PC centrifuge, when nitrogen decompression is needed, the L-shaped plate, the valve plate and the diaphragm are moved upward, the diaphragm is separated from the stepped ring, the valve plate is separated from the ring seat, nitrogen can enter the gap between the valve plate and the ring seat through the connecting pipe, and is discharged through the exhaust pipe, so that the large-flow decompression effect is achieved, when the decompression is close to 20kpa, the valve plate is moved downward, the valve plate is inserted into the ring seat, and the diaphragm is not in contact with the stepped ring, so that small-flow decompression is facilitated through the concave hole, when the decompression is 20kpa, the valve plate is continuously moved downward, the diaphragm is in contact with the stepped ring, so that the device is closed, the large-flow exhaust and the small-flow exhaust are combined, nitrogen decompression control is facilitated, nitrogen decompression is avoided to be too large or too small, and the centrifuge shaft seal requirement is not met. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a perspective view of the embodiment of the utility model;

[0013] Fig. 2 It is a front view of the embodiment of the utility model;

[0014] Fig. 3 It is a perspective view of the embodiment of the utility model after removing the protective cover and the motor. DETAILED DESCRIPTION

[0015] Hereinafter, the utility model will be described in detail with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0016] As Figs. 1 to 3The embodiment of the PC centrifuge shaft pressure automatic control device of the utility model shows, this PC centrifuge shaft pressure automatic control device includes the pipeline 1 connected with centrifuge inside, one end of pipeline 1 is fixedly connected with the connecting pipe 2, one end of connecting pipe 2 is fixedly communicated with the recess 3, the top of recess 3 is fixedly connected with the top seat 4, the bottom of recess 3 one side is fixedly communicated with the exhaust pipe 19, recess 3 is fixedly connected with ring seat 5 in, the inner wall of ring seat 5 is fixedly connected with the stepped ring 6, the bottom of top seat 4 is provided with multiple limit grooves arranged in annular array, the L-shaped plate 7 that can move up and down is slidably connected in limit groove, the bottom of multiple L-shaped plates 7 all protrudes top seat 4 and is fixedly connected with the valve plate 8 of circular, the bottom of valve plate 8 is fixedly connected with the diaphragm 9, the diaphragm 9 can be in contact with the upper surface of stepped ring 6, valve plate 8 is slidably connected with ring seat 5, multiple recess holes 10 arranged in annular array are set up in the edge of valve plate 8, connecting pipe 2 is located above stepped ring 6, exhaust pipe 19 is located below stepped ring 6, by connecting the device with PC centrifuge, when needing to carry out nitrogen decompression, by making L-shaped plate 7, valve plate 8 and diaphragm 9 move upwards, make diaphragm 9 separate from stepped ring 6, valve plate 8 separate from ring seat 5, so that nitrogen can enter the gap between valve plate 8 and ring seat 5 through connecting pipe 2, and is discharged through exhaust pipe 19, so as to play the role of large flow decompression, when decompression is close to 20kpa, by moving valve plate 8 downwards, make valve plate 8 insert into ring seat 5, and diaphragm 9 does not contact with stepped ring 6, so as to facilitate small flow pressure relief through recess hole 10, when decompression is 20kpa, valve plate 8 continues to move downwards, make diaphragm 9 contact with stepped ring 6, so that the device is closed, by the setting of large flow exhaust and small flow exhaust combination, so as to facilitate nitrogen decompression control, avoid that nitrogen decompression is too large or too small, to meet the requirement of centrifuge shaft seal.

[0017] In an embodiment of the present application, preferably, a threaded stud 11 is connected at the center of the top seat 4, the bottom of the threaded stud 11 can contact the upper side of the valve plate 8, the stepped surface of the L-shaped plate 7 is connected with the top seat 4 through a spring, so that the up and down movement of the valve plate 8 can be adjusted by rotating the threaded stud 11.

[0018] In an embodiment of the present application, preferably, a polygonal slot is formed at the top of the threaded stud 11, a polygonal column 12 is slidably connected in the polygonal slot, the polygonal column 12 can slide up and down in the polygonal slot, and the threaded stud 11 can be rotated by rotating the polygonal column 12.

[0019] In one embodiment of the present application, preferably, the outer side of the top base 4 is fixed with a cover 13, the cover 13 is fixed with a support 14, the top of the support 14 is fixed with a support plate 15, the middle of the upper side of the support plate 15 is fixedly installed with a motor 16, the output end of the motor 16 penetrates through the support plate 15 and is fixedly connected with the top of the polygonal column 12, and the polygonal column 12 can be driven to rotate by starting the motor 16, so as to drive the valve plate 8 to move up and down.

[0020] In one embodiment of the present application, preferably, the bottom of the concave base 3 is provided with a protective shell 17, the top of the protective shell 17 is connected with the cover 13 through bolts, the free end of the connecting pipe 2 penetrates through one side of the protective shell 17, and the free end of the exhaust pipe 19 penetrates through the other side of the protective shell 17, and the protective shell 17 and the cover 13 can protect the concave base 3 and the top base 4 of the device.

[0021] In one embodiment of the present application, preferably, the support plate 15 is fixedly installed with a protective cover 18, and the motor 16 is located in the interior of the protective cover 18, so that the protective cover 18 can protect the motor 16.

[0022] In use, the device is connected with a PC centrifuge, when nitrogen decompression is needed, the polygonal column 12 and the stud 11 are driven to rotate by starting the motor 16, the L-shaped plate 7, the valve plate 8 and the diaphragm 9 are moved upward under the action of the spring, the diaphragm 9 is separated from the stepped ring 6, the valve plate 8 is separated from the ring base 5, the motor 16 is closed, so that the nitrogen can enter the gap between the valve plate 8 and the ring base 5 through the connecting pipe 2, and is discharged through the exhaust pipe 19, thereby achieving the effect of large-flow decompression, when the decompression is close to 20kpa, the motor 16 is started to rotate reversely, the valve plate 8 is moved downward, the valve plate 8 is inserted into the ring base 5, and the diaphragm 9 does not contact the stepped ring 6, the motor 16 is closed, so that small-flow decompression is facilitated through the concave hole 10, when the decompression is 20kpa, the motor 16 is continuously started to rotate reversely, the valve plate 8 is continuously moved downward, the diaphragm 9 is abutted against the stepped ring 6, so that the device is closed, and the combination of large-flow exhaust and small-flow exhaust facilitates nitrogen decompression control, avoids excessive or insufficient nitrogen decompression, and further meets the requirement of centrifuge shaft seal.

[0023] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shaft pressure automatic control device for a PC centrifuge, comprising a pipeline (1) connected with the inside of the centrifuge, one end of the pipeline (1) being fixedly connected with a connecting pipe (2), one end of the connecting pipe (2) being fixedly connected with a recess (3), characterized in that, The top of the recess (3) is fixedly connected with a top seat (4), one side of the bottom of the recess (3) is fixedly connected with an exhaust pipe (19), the recess (3) is fixedly connected with a ring seat (5), the inner wall of the ring seat (5) is fixedly connected with a stepped ring (6), the bottom of the top seat (4) is provided with a plurality of limit grooves arranged in a ring shape, the L-shaped plate (7) is slidably connected in the limit groove and can move up and down, the bottom of the plurality of L-shaped plates (7) extends out of the top seat (4) and is fixedly connected with a circular valve plate (8), the bottom of the valve plate (8) is fixedly connected with a diaphragm (9), the diaphragm (9) can abut against the upper surface of the stepped ring (6), the valve plate (8) is slidably connected with the ring seat (5), a plurality of recess holes (10) are arranged in a ring shape at the edge of the valve plate (8), the connecting pipe (2) is located above the stepped ring (6), and the exhaust pipe (19) is located below the stepped ring (6).

2. The shaft pressure automatic control device for a PC centrifuge according to claim 1, characterized by: The center of the top seat (4) is threadedly connected with a stud (11), the bottom of the stud (11) can contact the upper side of the valve plate (8), and the stepped surface of the L-shaped plate (7) is connected with the top seat (4) through a spring.

3. The shaft pressure automatic control device for a PC centrifuge according to claim 2, characterized by: The top of the stud (11) is provided with a polygonal groove, and a polygonal column (12) is slidably connected in the polygonal groove.

4. The shaft pressure automatic control device for a PC centrifuge according to claim 3, characterized by: The outer side of the top seat (4) is fixedly connected with a protective cover (13), the protective cover (13) is fixedly connected with a support (14), the top of the support (14) is fixedly connected with a support plate (15), the upper side of the support plate (15) is fixedly connected with a motor (16), and the output end of the motor (16) penetrates through the support plate (15) and is fixedly connected with the top of the polygonal column (12).

5. The shaft pressure automatic control device for PC centrifuge according to claim 4, characterized by: The bottom of the recess (3) is provided with a protective shell (17), the top of the protective shell (17) is connected with the protective cover (13) through bolts, the free end of the connecting pipe (2) penetrates through one side of the protective shell (17), and the free end of the exhaust pipe (19) penetrates through the other side of the protective shell (17).

6. The shaft pressure automatic control device for PC centrifuge according to claim 4, characterized by: The support plate (15) is fixedly connected with a protective cover (18), and the motor (16) is located in the protective cover (18).

Images