CN202692828U

CN202692828U - Double-limiting self-locking type ball collecting screen

Info

Publication number: CN202692828U
Application number: CN 201220379509
Authority: CN
Inventors: 于转云
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-02
Filing date: 2012-08-02
Publication date: 2013-01-23
Anticipated expiration: 2022-08-02

Abstract

The utility model discloses a double-limiting self-locking type ball collecting screen. The technical scheme is characterized in that: the double-limiting self-locking type ball collecting screen comprises a barrel, screen plates in the barrel, and ball outlets arranged on a side wall of the barrel; wherein bottom ends of the screen plates are connected with a three-connecting-rod driving device, the three-connecting-rod driving device comprises a connecting rod I, a connecting rod II, and a connecting rod III, the three connecting rods are connected through moving limiting clamping slots, the connecting rod II is connected with a gear rack through an installing hole, a bottom of the gear rack is in threaded connection with a locking nut, one side of the gear rack provided with teeth is engaged with a gear, one side of the gear rack without tooth is provided with a positioning roller. The double-limiting self-locking type ball collecting screen of the utility model has the beneficial effects that: by adopting the three-connecting-rod driving device to realize three different states of the ball collecting screen, the double-limiting self-locking type ball collecting screen not only can complete basic functions of the ball collecting screen, but also can thoroughly wash the screen plates in a backwash operating mode, therefore, the double-limiting self-locking type ball collecting screen of the utility model has the advantages of simple structure, small abrasion of movement mechanism, high ball collecting rate, stable operation, and high reliability.

Description

A kind of pair of limit self formula ball screen

Technical field

The utility model relates to heat exchanger cleaning technique field, especially relates to a kind of two limit self formula ball screens for thermal power generation, nuclear power and various pipe heat exchanger cooling water pipeline cleaning.

Background technology

Rubber ball cleaning system is used for finishing the cleaning of pipe heat exchanger, it adopts glueballs repeatedly to clean condensation pipe, the cleanliness factor of heat exchanger tube in the condensers such as assurance steam turbine, thereby improve the generating efficiency of generating set, effectively prevent fouling, the corrosion of heat exchanger tube, at utmost prolong the service life of heat exchanger tube.Ball screen is the key equipment in the rubber ball cleaning system, be installed on the water outlet pipeline section of condenser circulating water line, its effect is to separate from cooling water with the cleaning glueballs of system's operation, and must possess characteristics such as not losing, do not block ball, draw ball collector by fairlead from ball screen after glueballs is recovered.In the prior art common ball screen in use the said goods mainly have following problem: 1) existing ball screen is because the reason such as unreasonable structure, transmission mechanism be unstable, easy to wear causes ball screen to have in actual use the phenomenons such as jumping ball, long-pending ball, card ball, folder ball; 2) ball screen itself does not possess auto-lock function, only by YE control, restriction site, the actuator operating angle amount of spending often occurs in consequently using when each Working pasition, web plate can't be closed tight, and be difficult for being realized (can't find that from the outside it is low only to show as ball collecting rate); 3) under the backwash operating mode, ball screen is in open mode, and web plate and circulating water flow can't be realized backwash to substantially parallel, the foreign material of ball screen surface sediment can only be washed away, and can't play to the foreign material in the grid cleaning effect; 4) control section of original ball screen needs power too large, is not suitable for manual operation when electric performance device breaks down.Application number is 200310114491.4, the application title is to disclose a kind of ball-net apparatus in the utility application of " crank connecting rod type ball net drawing device ", the web plate rotating shaft places on the cylindrical shell in this device, the bottom of web plate is provided with the swing bearing, actuating unit is crank-linkage type mechanism, the rod hinge connection of swing bearing and actuating unit, the other end and the crank of connecting rod are hinged, the outer manipulation device of the crank axle of transmission device and ball collecting chamber links to each other, and it is characterized in that crank axle is that the crank that is arranged on the ball collecting chamber is coaxial.This device has reduced parts, simplify the structure, reduced cost, when web plate is operated in the extreme position of receiving ball and cleaning operating mode, connecting rod and crank conllinear, by the control of outside YE, reach the purpose of self-locking, but still have the shortcoming that transmission is excessive, be difficult to realize the backwash state.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming that exists in the prior art, provide a kind of simple in structure, rationally, kinetic stability is high, has dual spacing self-locking ball screen, the technical scheme that adopts is: a kind of pair of limit self formula ball screen, comprise cylindrical shell, web plate in the cylindrical shell and the ball mouth that is positioned on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise the connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with tooth bar by installing hole, the bottom thread of described tooth bar connects locking nut, have a side of tooth to be engaged with gear on the tooth bar, a side anodontia on the tooth bar is provided with positioning roller.

The technical solution of the utility model also has: a kind of pair of limit self formula ball screen, comprise the web plate in cylindrical shell, the cylindrical shell and be positioned at ball mouth on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with tooth bar by installing hole, the bottom thread of described tooth bar connects locking nut, all is engaged with gear by tooth on two sides of tooth bar.

The technical solution of the utility model also has: a kind of pair of limit self formula ball screen, comprise the web plate in cylindrical shell, the cylindrical shell and be positioned at ball mouth on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with rotating screw bolt by installing hole, the bottom thread of described rotating screw bolt connects locking nut, and hold-down nut also has been threaded on the rotating screw bolt.

Technical characterictic of the present utility model also has: the outside of described hold-down nut is provided with protective cover.

Technical characterictic of the present utility model also has: also be connected with movable spacing draw-in groove between described connecting rod I and connecting rod III and the described web plate.

Technical characterictic of the present utility model also has: a side of the spacing draw-in groove of described activity is provided with limited block.

Technical characterictic of the present utility model also has: the top of described three connecting rods, the inboard of web plate are provided with fixed support.

The beneficial effects of the utility model are: 1) this self-locking ball screen adopts three driving rod drives to realize three kinds of different operating modes of ball screen, not only can finish the basic function of ball screen, can also under the backwash operating mode, thoroughly clean web plate, have that the wearing and tearing of simple in structure, motion are little, ball collecting rate is high, working stability, advantage that reliability is high, and realized backwash state truly.2) this ball screen has adopted and has had rack-and-pinion limit and the spacing two limit-type design of movable spacing draw-in groove, and the spacing application of this pair has guaranteed three kinds of accuracys that the operating mode upper/lower positions switches.3) for guarantee three kinds of Working pasitions accurately, in a side of the spacing draw-in groove of activity limited block has been installed, the position when defining the ball screen change working through the position of specially designed limited block has reached the purpose of accurate location.4) fixed support that is installed in the ball screen inboard has played the effect of support, location.

Description of drawings

Accompanying drawing 1 is that the utility model the first embodiment receives ball operating mode schematic diagram, accompanying drawing 2 is top views of accompanying drawing 1, and accompanying drawing 3 is A-A views of accompanying drawing 1, and accompanying drawing 4 is the utility model first embodiment backwash operating mode schematic diagrames, accompanying drawing 5 is the non-view that put into operation of the utility model the first embodiment, accompanying drawing 6 is that the utility model the second embodiment receives ball operating mode schematic diagram, and accompanying drawing 7 is that the utility model the 3rd embodiment receives ball operating mode schematic diagram, and accompanying drawing 8 is the utility model the 3rd embodiment backwash operating mode schematic diagrames, wherein 1 is cylindrical shell, the 2nd, web plate, the 3rd, tooth bar, the 4th, positioning roller, the 5th, gear, the 6th, locking nut, the 7th, ball mouth, the 8th, connecting rod I, the 9th, the connecting rod II, the 10th, connecting rod III, the 11st, movable spacing draw-in groove, the 12nd, limited block, the 13rd, hold-down nut, the 14th, rotating screw bolt, the 15th, protective cover, the 16th, fixed support.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is specifically described.The utility model discloses a kind of pair of limit self formula ball screen, comprise the web plate 2 in cylindrical shell 1, the cylindrical shell 1 and be positioned at ball mouth 7 on cylindrical shell 1 sidewall, in order to realize the different conditions of web plate 2, be connected with three driving rod drives in the bottom of web plate 2 and drive web plate 2 motions, this three driving rod drive comprises connecting rod I 8, connecting rod II 9 and connecting rod III 10, be connected by the spacing draw-in groove 11 of activity between three connecting rods, between connecting rod I 8 and connecting rod III 10 and the web plate 2 also the spacing draw-in groove 11 of employing activity be connected.According to actual conditions, can select the conversion adopting different drive units to drive three connecting rods and then realize different operating modes between three connecting rods, the utility model discloses following three kinds of different embodiment.

Connecting rod II 9 in one: three driving rod drive of embodiment is connected with tooth bar 3 by installing hole, connecting rod II 9 locking nut 6 that is threaded is passed in the bottom of tooth bar 3, the side meshing gear 5 that tooth is arranged on the tooth bar 3, a side anodontia on the tooth bar 3 contacts with positioning roller 4, like this, when tooth bar 3 moves up and down under gear 5 drives, by positioning roller 4, can realize tooth bar 3 the definite of lengthwise position and guarantee closely engagement between various different operating mode lower gears 5 and tooth bar 3.During design, the setting of the number of teeth of the number of teeth of gear 5, tooth bar 3 is finished according to a kind of like this mode: when ball screen was receipts ball operating mode, gear 5 arrived the top of tooth bars 3; When ball screen was the backwash operating mode, gear 5 arrived the bottom of tooth bar 3; When ball screen is non-putting into operation during state, gear 5 is positioned at the medium position of tooth bar 3.By this kind design, can prevent ball screen transmission mechanism hyperkinesia when each different change working, the cooperation of this kind rack-and-pinion transmission is that the first of this ball screen is spacing, and by the cooperation of movable clamp groove 11, to reach the position that limits between three connecting rods be that the second in this ball screen is spacing, the utilization of two limit methods has effectively guaranteed three kinds of accuracys that operating mode is switched, and has avoided the not tight situation of web plate 2 closures to occur.This three driving rod drive also can adopt the modes such as worm drive, hydraulic drive to realize except using the said gear rack-driving.

The concrete structure of movable spacing draw-in groove 11 is seen accompanying drawing 4, is specially two one of adjacent parts contact positions and has projection, and another has the groove that matches, and like this, when component movement puts in place, by the cooperation between projection and the groove, reaches spacing purpose.

During use, ball screen has three kinds of diverse locations, is respectively to receive ball operating mode, backwash operating mode and the non-state that puts into operation.1) receive the ball operating mode: this moment, gear 5 was positioned at the top of tooth bar 3, and three connecting rods are on the same straight line, and under the recirculated water effect, glueballs is discharged from ball mouth 7 after entering cylindrical shell 1.2) backwash operating mode: three connecting rods pulling web plate 2 is to the negative angle position, and recirculated water washes away the opposite side of web plate 2, realizes the thorough cleaning to the grating type web plate.3) the non-state that puts into operation: when rubber ball cleaning system did not move, under three driving rod drive effects, web plate 2 was parallel with recirculated water, made web plate 2 in stable condition.

Embodiment two: the difference of present embodiment and embodiment one has been to change the structure of tooth bar 3, make tooth bar 3 two sides all have the tooth of projection, like this, tooth on two sides is engageable gear 5 all, the transmission life-span of the tooth bar 3 of two plane type structure is prolonged greatly, Transmission bearing also increases simultaneously, and transmission is more steady and smooth.

Embodiment three: the difference of present embodiment and embodiment one has been to use screw-drive mechanism to finish the driving of three connecting rods, and realizes the conversion of three kinds of work condition states of ball screen.Connecting rod II 9 is connected with rotating screw bolt 14 by installing hole, and the bottom thread of this rotating screw bolt 14 connects locking nut 6, and hold-down nut also has been threaded on the rotating screw bolt 14.In these worm drive, also be provided with protective cover 15.Like this, when rotating screw bolt 14 rotated under external force drives, by worm drive, drivening rod II 9 was up, moves to backwash operating mode or the non-state that puts into operation.

In the above-described embodiments, can be provided with limited block 12 in side, the appropriate position of the spacing draw-in groove 11 of activity, the position was accurate when the installation of this limited block defined three kinds of change working again.Also can establish fixed support 16 in the top of three connecting rods, the inboard of web plate 2, this fixed support 16 is in the top of three connecting rods, and the size of left and right directions has been passed through accurate Calculation, thereby guarantee receive under ball operating mode or the backwash operating mode all can with the interior side contacts of web plate 2, again guaranteed the stable of state and the fastness that supports.

The utility model principle is simple to operation, can make the ball screen of different size, size, web plate can be two web plates according to actual needs, also can be the monolithic web plate, when being made into the monolithic web plate, only need the location-appropriate motion of transmission mechanism and movable spacing draw-in groove is got final product.The pinion and-rack that the kind of drive of ball screen occurs in above-described embodiment, the screw-and-nut, certainly can also adopt other modes to finish, such as hydraulicdriven mode, but as long as be provided with in the bottom of ball screen three connecting rods and and then under the control of three connecting rods, finishing the conversion of different operating modes, namely is the equivalent variations of the utility model public technology scheme.

Certainly; above-mentioned explanation is not limitation of the utility model; the utility model also is not limited only to above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also belong to protection domain of the present utility model.

Claims

1. two limit self formula ball screen, comprise the web plate in cylindrical shell, the cylindrical shell and be positioned at ball mouth on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with tooth bar by installing hole, the bottom thread of described tooth bar connects locking nut, have a side of tooth to be engaged with gear on the tooth bar, a side anodontia on the tooth bar is provided with positioning roller.

2. two limit self formula ball screen, comprise the web plate in cylindrical shell, the cylindrical shell and be positioned at ball mouth on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with tooth bar by installing hole, and the bottom thread of described tooth bar connects locking nut, all is engaged with gear by tooth on two sides of tooth bar.

3. two limit self formula ball screen, comprise the web plate in cylindrical shell, the cylindrical shell and be positioned at ball mouth on the cylinder lateral wall, it is characterized in that: the bottom of described web plate is connected with three driving rod drives, described three driving rod drives comprise connecting rod I, connecting rod II and connecting rod III, be connected by the spacing draw-in groove of activity between three connecting rods, the connecting rod II is connected with rotating screw bolt by installing hole, and the bottom thread of described rotating screw bolt connects locking nut, and hold-down nut also has been threaded on the rotating screw bolt.

4. according to claimed in claim 3 pair of limit self formula ball screen, it is characterized in that: the outside of described hold-down nut is provided with protective cover.

5. according to claim 1,2 or 3 described pairs of limit self formula ball screens, it is characterized in that: also be connected with movable spacing draw-in groove between described connecting rod I and connecting rod III and the described web plate.

6. according to claimed in claim 5 pair of limit self formula ball screen, it is characterized in that: a side of the spacing draw-in groove of described activity is provided with limited block.

7. according to claim 1,2 or 3 described pairs of limit self formula ball screens, it is characterized in that: the top of described three connecting rods, the inboard of web plate are provided with fixed support.