CN202531881U

CN202531881U - Rotary quantitative feed valve

Info

Publication number: CN202531881U
Application number: CN2012200999430U
Authority: CN
Inventors: 赵洪霞; 刘卓; 覃事永
Original assignee: Blue Star Shenyang Project & Research Institute Of Light Industry Machinery; Bluestar Beijing Chemical Machinery Co Ltd
Current assignee: Bluestar Industrial Services Shenyang Co Ltd
Priority date: 2012-03-16
Filing date: 2012-03-16
Publication date: 2012-11-14
Anticipated expiration: 2022-03-16

Abstract

The utility model relates to a rotary quantitative feed valve, which comprises a valve body (1), a valve core (4), a speed reducer (11) and a motor (12), wherein the valve core (4) is rotationally arranged in the valve body cavity (102) of the valve body (1); and the motor (12) is connected with the valve core (4) through the speed reducer (11). The rotary quantitative feed valve is characterized in that: a plurality of feed grooves (401) are distributed on the external circumferential surface of the valve core (4) positioned between a feed pipe (101) and a discharge pipe (103); and the motor (12) is a variable-frequency motor. Compared with the conventional vane type feeding, the rotary valve has the advantages of more uniform and accurate blanking, small blanking amount, capability of meeting the requirement of small-dosage quantitative feeding, capability of serving as a discharge valve, applicability to a feed system during packaging and metering, and particular suitability for quantitative continuous feed processes in the industries of chemical industry, pharmacy and the like.

Description

A kind of rotation dosing valve

Technical field

The utility model relates to the low dose of reinforced accurate quantification feeding technology of industries such as petrochemical industry, pharmacy, is specifically related to a kind of rotation dosing valve.

Background technique

Present domestic chemical industry, medicine and other fields, rotary valve are applied to do more that discharge valve uses, and rotary valve is applied to the less of dosing.Reason is that domestic rotary valve adopts leaf structure more, and the blanking amount is bigger, and the blanking amount is also inhomogeneous, can not satisfy the requirement of dosing.Especially chemical industry be used for doing catalyzer etc. a bit raw material at the blending process adding quantity seldom, even adopt the rotary valve of very little blade impeller, the error of feed is also very big, is difficult to satisfy the requirement of dosing.

Summary of the invention

For solving the problem that above-mentioned existing technology exists, satisfy the requirement of low dose of dosing, the utility model provides a kind of rotation dosing valve that is applied to dosing.This rotation dosing valve both can be used as the dosing valve more can be used as common discharge valve and use.

For realizing above-mentioned purpose, the utility model has adopted following scheme:

A kind of rotation dosing valve; Comprise valve body (1), spool (4), speed reducer (11) and motor (12); Said spool (4) is rotatable to be installed in the valve body cavity (102) of said valve body (1); Said motor (12) is connected with said spool (4) through speed reducer (11), is positioned on the outer circumference surface of the said spool (4) between supply pipe (101) and the discharge nozzle (103) to be distributed with a plurality of feeding troughs (401).

Further, said feeding trough (401) is the hole slot of the oval shape structure of bottom band fillet.

Further, the inner hollow-core construction that adopts of said spool (4).

Further, axially have a nitrogen input hole (104), the external nitrogen tube joint of said nitrogen input hole (104) (106) in the position at two ends at said valve body cavity (102).

Further, at said supply pipe (101) and said spool (4) contacting point stuffing box gland (2) is installed, said stuffing box gland (2) is fixed on said supply pipe (101) mouth of pipe inwall.

Further, between said valve body cavity (102) and said spool (4) radial clearance, double seal ring (3) is installed.

Further, on the external cylindrical surface of said valve body cavity (102) inner cylindrical surface or said spool (4), have annular seal groove, said seal ring (3) is installed in the said annular seal groove.

Further, the material of said stuffing box gland (2) and said seal ring (3) is for gathering tetrafluoro.

Further, bearing front end place has adopted the sealing configuration of exoskeletal formula oil sealing (6).

Further, said motor (12) is a variable-frequency motor.

This rotation dosing valve has following beneficial effect:

(1) valve core inside adopts hollow-core construction, has alleviated the weight of whole valve; On spool outside and the corresponding circumference of valve body charging and discharging pipe, be evenly distributed with feeding trough, be processed into band fillet feeding trough, can prevent buildup; The volume of feeding trough can calculate according to actual feeding coal requirement and delivery rate accurately.Blade type feed with is in the past compared, and this rotary valve blanking is more even, and the blanking amount is little, is well positioned to meet the requirement of low dose of dosing.

(2) motor adopts variable-frequency motor; Control rotating speed of motor through regulating frequency, realize that secondary or three grades are reinforced, guaranteed charging precision; Having overcome in the past, rotary valve feeds in raw material inhomogeneous; The shortcoming that feed is inaccurate in the charging system in the time of not only can being used as discharge valve and more can being used as package metro-measuring, is particularly suitable for the quantitative continuous charging process of industries such as chemical industry, pharmacy.

(3) this rotary valve position near two ends on the valve body cavity has a nitrogen input hole; Charge into nitrogen in the working procedure and prevent that powder gets into bearing in the reinforced process; Guarantee that bearing not by improved grinding, has improved working environment, effectively prolonged the working life of rotary valve.And this rotary valve sealing effect is good, is applied to production line and can prevents effectively to pollute, and has further prolonged the working life of bearing, practices thrift cost, has greatly improved working efficiency.

(4) this rotary valve is reasonable in design, and technology is simple, compact structure, and automaticity is high, and effect is good, but extensive use in powder feed and discharge process.

Description of drawings

Fig. 1: the structural representation of the utility model rotation dosing valve;

The A of Fig. 2: Fig. 1 is to view;

Fig. 3: the structural representation of spool;

The B-B sectional view of Fig. 4: Fig. 3;

Fig. 5: the structural representation of valve body;

The C-C sectional view of Fig. 6: Fig. 5;

Fig. 7: the surface structure schematic representation of stuffing box gland;

The D-D sectional view of Fig. 8: Fig. 7.

Description of reference numerals:

1-valve body; 101-supply pipe; 102-valve body cavity; 103-discharge nozzle; 104-nitrogen input hole; 105-seal groove; 106-nitrogen tube joint;

2-stuffing box gland; 3-seal ring;

4-spool; 401-feeding trough;

5-the first end cap; 6-exoskeletal formula oil sealing; 7-the second end cap; 8-the three end cap;

9-the four end cap; 10-link press span; 11-speed reducer; 12-motor; 13-bearing.

Embodiment

Below in conjunction with accompanying drawing 1-7, the utility model is further specified:

The utility model rotation dosing valve comprises valve body 1, stuffing box gland 2, seal ring 3, spool 4, each end cap and link press span 10, speed reducer 11 and motor 12; Valve body 1 comprises supply pipe 101, valve body cavity 102 and discharge nozzle 103; Like Fig. 5 and shown in Figure 6, supply pipe 101 discharge nozzles 104 are coniform body; On the internal surface of column of valve body cavity 102, have annular seal groove 105, be used to install seal ring 3; Position, bearing 13 front end places near two ends on valve body cavity 102 have a nitrogen input hole 104 respectively; And be welded with nitrogen tube joint 106; Charge into nitrogen in the working procedure and prevent that powder gets into bearing in the reinforced process; Guarantee that bearing not by improved grinding, has improved working environment, effectively prolonged the working life of rotary valve.

Fig. 3 and Fig. 4 show the structural representation of spool 4, and hollow-core constructions are adopted in spool 4 inside, have alleviated the weight of whole valve; Spool 4 outside with valve body 1 supply pipe 101, discharge nozzle 103 corresponding circumference on be evenly distributed with feeding trough 401, feeding trough 401 is hole slots of the oval shape structure of bottom band fillet, is processed into and is with the fillet feeding trough, can prevent buildup; The volume of feeding trough 401 can calculate according to actual feeding coal requirement and delivery rate accurately.Blade type feed with is in the past compared, and the utility model blanking is more even, and the blanking amount is little, can require design according to reality.

Spool 4 is through in the rotatable valve body cavity 102 that is installed in valve body 1 of bearing; The contacting point of the supply pipe 101 of spool 4 and valve body 1 is adopted and is gathered the stuffing box gland 2 that PTFE makes and seal; The structure of stuffing box gland 2 is as shown in Figure 7, during installation sealing cover 2 is compressed with spool 4, is fixed on the supply pipe 101 with jackscrew; Material can only accumulate in the feeding trough 401 of spool 4 and along with the rotation blanking of spool 4 when powder was through supply pipe 101 blankings during work, guaranteed that valve do not reveal; Between spool 4 and valve body cavity 102 radial clearances, adopt and gather tetrafluoro double seal ring 3 and seal, guarantee that material do not go here and there the chamber, valve body does not have leakage; Bearing front end place has adopted the sealing configuration of exoskeletal formula oil sealing 6; It is better that the structure of the skeleton sealing of simple employing is in the past compared sealing effect; Having guaranteed does not have leakage with the reinforced valve closing rear valve body that finishes in reinforced process, and powder also is not easy to grind bearing bad through the gap entering bearing of spool and valve body; Motor 12 is connected with spool 4 through speed reducer 11, for the rotation of spool 4 provides power, in the present embodiment; Motor adopts Frequency Converter Control, controls rotating speed of motor through regulating frequency, realizes that secondary or three grades are reinforced; Guaranteed charging precision, it was reinforced inhomogeneous to have overcome in the past rotary valve, the shortcoming that feed is inaccurate; In the charging system in the time of not only can being used as discharge valve and more package metro-measuring can being used as, be particularly suitable for the quantitative continuous charging process of industries such as chemical industry, pharmacy.

During work, motor 12 is quick rotation at first, the quick feed of rotary valve; When the rotary valve feeding coal reaches 80% left and right sides of setting the feed value, slow down by the Frequency Converter Control motor speed, realize feed at a slow speed; When feeding coal reached setting value, motor stopped operating, and the rotary valve blanking stops.

The utility model is reasonable in design, and technology is simple, compact structure, and automaticity is high, and effect is good, but extensive use in powder feed and discharge process.

Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the realization of the utility model does not receive the restriction of aforesaid way; As long as adopted method design of the utility model and the various improvement that technological scheme is carried out; Or the design of the utility model and technological scheme are directly applied to other occasion without improving, all in the protection domain of the utility model.

Claims

1. one kind is rotated the dosing valve; Comprise valve body (1), spool (4), speed reducer (11) and motor (12); Said spool (4) is rotatable to be installed in the valve body cavity (102) of said valve body (1); Said motor (12) is connected with said spool (4) through speed reducer (11), it is characterized in that: be positioned on the outer circumference surface of the said spool (4) between supply pipe (101) and the discharge nozzle (103) and be distributed with a plurality of feeding troughs (401).

2. rotation dosing valve according to claim 1 is characterized in that: said feeding trough (401) is the hole slot of the oval shape structure of bottom band fillet.

3. rotation dosing valve according to claim 1 and 2 is characterized in that: the inner hollow-core construction that adopts of said spool (4).

4. rotation dosing valve according to claim 3 is characterized in that: axially have a nitrogen input hole (104), the external nitrogen tube joint of said nitrogen input hole (104) (106) in the position at two ends at said valve body cavity (102).

5. according to claim 1,2 or 4 described rotation dosing valves; It is characterized in that: at said supply pipe (101) and said spool (4) contacting point stuffing box gland (2) is installed, said stuffing box gland (2) is fixed on said supply pipe (101) mouth of pipe inwall.

6. rotation dosing valve according to claim 5 is characterized in that: between said valve body cavity (102) and said spool (4) radial clearance, double seal ring (3) is installed.

7. rotation dosing valve according to claim 6 is characterized in that: on the external cylindrical surface of said valve body cavity (102) inner cylindrical surface or said spool (4), have annular seal groove, said seal ring (3) is installed in the said annular seal groove.

8. rotation dosing valve according to claim 7 is characterized in that: the material of said stuffing box gland (2) and said seal ring (3) is for gathering tetrafluoro.

9. according to claim 1,2,4,6,7 or 8 described rotation dosing valves, it is characterized in that: bearing front end place has adopted the sealing configuration of exoskeletal formula oil sealing (6).

10. rotation dosing valve according to claim 9 is characterized in that: said motor (12) is a variable-frequency motor.