CN2130994Y - Driving device for opening or closing ball valve or butterfly valve - Google Patents

Abstract

Disclosed is a driving device for opening or closing a ball valve or a butterfly valve, comprising a box body, an upper cover, an end cover, a hand wheel, and an inner driving system. The utility model is characterized in that one side of the box body is provided with a screw rod, and a rotating arm is arranged beside the screw rod which is provided with a nut with a pin; one end of the rotating arm is provided with a rotating shaft, and the other end is provided with a longitudinal long hole slot; the screw rod and the rotating arm are connected through the pin on the nut penetrating through the hole slot. One end of the screw rod is provided with a shaft rod which is connected with the hand wheel through the end cover; the rotating shaft on the rotating arm is provided with a hole for connecting with a valve rod. The utility model has the advantages of small volume, light weight, simple manufacture, low cost, rapid start and stop, and easy operation.

Description

Driving device for opening or closing ball valve or butterfly valve

The utility model relates to valve bandle set, particularly a kind of transmission device that is used to open and close ball valve or butterfly valve.

Ball valve or butterfly valve etc. be various to be revolved to turn 90 degrees by closure member and realizes the valve that opens and closes, generally be to use the handle that is connected with valve rod direct operated, but in large-scale valve, moment of torsion required during owing to keying is big, be subjected to the restriction of people's handgrip power, handle by transmission device.In known technology, transmission device is made up of casing, loam cake, end cap, handwheel and inner transmission system etc.A side is provided with elongated cavity in the casing, its side is provided with the circular cavity that is communicated with it, the elongated cavity two ends stud with bearing, be pressed with end cap on the casing side of bearing outer end, be positioned at the vertical axis hole that has coaxial line of neutral position of circular cavity on bottom half and the loam cake, worm screw is housed in the elongated cavity, its two ends are positioned on the bearing, the worm gear that is meshed with worm screw is housed in the circular cavity, the rotating shaft at its two ends be positioned at the bottom of the case and in the axis hole that covers, the end of worm screw has axostylus axostyle, and it passes end cap and handwheel joins, and the commentaries on classics heart place of worm gear has and connects the circular hole that valve rod is used.Be used to open and close diameter greater than 400 millimeters valve as transmission device,, manually be difficult to handle, then must strengthen casing, install one additional and be connected with handwheel as driving wheel in that worm screw is other, to reduce to import torsion with the worm gear of worm meshing because of its required torsion is big.Structure of drive device owing to adopt thicker worm and worm wheel, also will install the one-level drive wheel additional when being used for large-scale valve, makes volume big and heavy; The required precision height of worm and worm gear system, difficulty of processing is big, and worm screw generally all adopts more valuable copper, makes the manufacture cost height; In addition,, imported the torsion requirement and limit, strengthened velocity ratio, especially adopted the secondary kind of drive, make to open and close used time lengthening because the acting force arm of said structure is short.

The purpose of this utility model is that the deficiency at known technology provides a kind of volume little in light weight, and processing is simple, and cost is low, and opens and closes the transmission device that is used to open and close ball valve or butterfly valve fast.

The purpose of this utility model realizes by following measure:

Be provided with an elongated cavity that connects with casing in the casing of the present utility model outward, its side is provided with the fan-shaped cavity that is communicated with it, the casing upper end is equipped with loam cake, the two ends of elongated cavity stud with bearing, the casing side of bearing outer end is pressed with end cap, be positioned at the vertical axis hole that has concentric in root place of fan-shaped cavity on bottom half and the loam cake, a screw rod is housed in the elongated cavity, its two ends are positioned on the bearing, the nut of a band pin is housed on the screw rod, one one end is housed in the fan-shaped cavity has rotating shaft, the other end has the pivoted arm of lengthwise hole slot, its rotating shaft be positioned at the bottom of the case and in the axis hole that covers, screw rod is connected by the hole slot that the pin on the nut pierces on the pivoted arm with pivoted arm, one end of screw rod has axostylus axostyle, and it passes end cap and is connected with handwheel, and the place, axle center of the rotating shaft of pivoted arm has the hole that is used to connect valve rod.

The utility model has the advantages that: because transmission system is used smaller and more exquisite screw rod and pivoted arm instead, and active force brachium, also need not increase transmission component when being used for large-scale valve, reduced the volume and weight of whole device greatly, under equal specification condition, can reduce the weight of half approximately than the transmission device that adopts worm and worm wheel; Because screw rod and pivoted arm processing are simple, have reduced manufacture cost; In addition, because active force brachium, it is little to import required torsion, need not increase transmission component, the feasible keying fast, because valve required torsion near the keying point time is big, and this device arm of force length in transmission process is constantly to change, the approaching more keying point arm of force is long more, makes to be easier to hand control.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

Be provided with an elongated cavity 12 that connects with casing in the casing 1 by the cast iron manufacturing of the present utility model outward, its side is provided with a fan-shaped cavity that is communicated with elongated cavity 13, the casing upper end is equipped with cast iron loam cake 10 with screw, the two ends of elongated cavity stud with bearing 4 and 7, the casing side of bearing outer end is pressed with end cap 2 and 8 with screw, have the axis hole of using when connecting handwheel 9 on the end cap 8, be positioned at the vertical axis hole 14 and 15 that has concentric in root place of fan-shaped cavity on bottom half and the loam cake, the screw rod 3 of a steel is housed in the elongated cavity, its two ends are positioned on bearing 4 and 7, the square nut 6 of a cast iron is housed on the screw rod, it has a pin by a last side, one one end is housed in the fan-shaped cavity has the rotating shaft the other end has the lengthwise hole slot at 16 places cast iron pivoted arm 5, its rotating shaft be positioned at the bottom of the case and in the axis hole 14 and 15 that covers, screw rod and pivoted arm by on the nut of pacifying on the screw rod with pin pierce into the slotted hole groove that 16 places open on the pivoted arm and be connected.Make nut stretchy pivoted arm swing when screw rod moves back and forth, an end of screw rod has axostylus axostyle 17, and it passes the axis hole of opening on the end cap 8 and is connected with handwheel 9, and the circular hole 18 of valve rod 11 usefulness that are used to connect valve is located to have in the axle center of the rotating shaft of pivoted arm.This device also can be equipped with stop screw on the side arm of the casing at elongated cavity two ends, so that the hunting range to pivoted arm limits and regulates, when this device is connected with valve, can pierce into valve rod in the circular hole in the rotating shaft of pivoted arm and fix, with screw casing and valve body are fixed together then with key.

When with unlatching of this device or throttle down, rotate handwheel 9 with hand, driving screw rod 3 rotates, make nut 6 move along screw rod, when nut moves, on it with the lengthwise hole slot of pin on pivoted arm in slide, to adapt to the variation of the arm of force, thereby the pulling pivoted arm is along its axis swing, and then the valve rod that links to each other with the rotating shaft of pivoted arm of drive rotates, and realization is to the manipulation of valve.

Claims (1)

1, a kind of transmission device that is used to open and close ball valve or butterfly valve, by casing, loam cake, end cap, composition such as handwheel and inner transmission system, it is characterized in that being provided with in the casing elongated cavity that connects with casing outward, its side is provided with the fan-shaped cavity that is communicated with it, the casing upper end is equipped with loam cake, the two ends of elongated cavity stud with bearing, the casing side of bearing outer end is pressed with end cap, be positioned at the vertical axis hole that has concentric in root place of fan-shaped cavity on bottom half and the loam cake, a screw rod is housed in the elongated cavity, its two ends are positioned on the bearing, the nut of a band pin is housed on the screw rod, one one end is housed in the fan-shaped cavity has the pivoted arm that the rotating shaft the other end has the lengthwise hole slot, its rotating shaft be positioned at the bottom of the case and in the axis hole that covers, screw rod is connected by the hole slot that the pin on the nut pierces on the pivoted arm with pivoted arm, an end of screw rod has axostylus axostyle, it passes end cap and is connected with handwheel, and the place, axle center of the rotating shaft of pivoted arm has the hole that is used to connect valve rod.

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