CN2718367Y - Double-valve clack opening and closing device for steam trap - Google Patents

Abstract

The utility model discloses a double-valve flap opening and closing device of a steam trap, comprising a valve base dish arranged on a valve base and a floating ball device connected via a lever. The double-valve flap opening and closing device is characterized in that the double-valve flap opening and closing device further comprises a valve handle arranged on the valve base dish and upper and lower valve flaps which are connected in series on the valve handle and can move along the direction which and the drain direction are vertical. A floating ball is fixed on a lever mechanism and the valve handle is driven to move by the lever via a rotary shaft in the structure of the double-valve flap opening and closing device of the utility model. The valve base and the valve base dish are fixedly connected, and the valve base and the valve body are effectively sealed and fixed via screw threads, and the valve base is directly connected with a drain outlet. Two valve flaps are connected in series on the valve handle, and the two valve flaps move along the direction which and the drain direction are vertical. The utility model can improve the sealing property of a valve, reduce water attack erosion, visibly enhance drainability and prolong the service life of the drain valve by altering the frame mode and the assembled form of the valve base and the valve flaps.

Description

A kind of bivalve lobe start-stop device of Automatic steam trap Trap

Technical field

The utility model relates to an a kind of significant components of float ball type steam drain valve, specifically is a kind of bivalve lobe start-stop device of float ball type steam drain valve.

Background technique

At present, in the Automatic steam trap Trap application of universal machine, Ball float steam trap is big with its water displacement, can continuous drainage etc. uniqueness characteristics and be widely used.As everyone knows, drain valve is as a kind of energy-conserving product, its major function is exactly the choke draining, promptly get rid of delivery of steam equipment and steam and use the condensed water that equipment produced, prevent the leakage of useful steam simultaneously, thereby promote the calorific value of steam, improve effective utilization of steam, reduce the waste of steam thermal energy.

Generally, the valve seat 11 of drain valve and flap 12 are one, and promptly single valve lobe start-stop device sees also Fig. 1, and valve seat 11 directly designs on valve seat 12 (or with valve seat 11 one), directly the condensed water in the valve are discharged by this valve seat 11.There is following problem in this structure: (1) acts on the opposite power of both direction on the flap 12 owing to valve seat 11 inside and outside pressure reduction there are differences, flap 12 just needs one extra can could make proper functioning with the power of offsetting this pressure difference completely like this, this power can be the weight of condensation buoyancy of water or ball float assembly etc., the switching motion of flap 12 thereby be subjected to the restriction of design; (2) position of flap 12 height that must be lower than condensed water could guarantee that in draining, steam is not leaked.In other words, the minimum point of ball float will be higher than drain opening (being flap 12 axial location), thereby makes that the drainage capacity of drain valve is limited to; (3) valve seat 11 is generally hard sealing with the seal form of flap 12.This floating ball lever assembly that just requires to link to each other with flap 12 all should reach higher required precision in design and assembly process; (4) because the keying direction of flap 12 is consistent with drainage direction, also should consider and take into account water attack in drain valve work and erosion etc. influences the drain valve factor in working life.

Summary of the invention

In order to solve problem set forth above, the utility model proposes a kind of bivalve lobe start-stop device of Automatic steam trap Trap, in this structure, ball float is fixed on the leverage, and lever drives stem movement by rotating shaft; Valve seat is fixedlyed connected with valve seat disk, and valve seat then directly links to each other by the effective sealing and fixing of screw thread and with drain opening in valve body; Two flaps then are serially connected on the valve rod and along the direction vertical with drainage direction and move.The utility model can improve the sealability of valve by changing the mode of structure and the assembling form of valve seat and flap, reduces the water attack erosion, significantly improves drainage capacity, prolongs the working life of drain valve.

In order to realize the foregoing invention purpose, the utility model adopts following technological scheme, and a kind of bivalve lobe start-stop device of Automatic steam trap Trap comprises that one is arranged on the valve seat disk and a floating ball device that is connected by lever on the valve seat, it is characterized in that described device further comprises:

Valve rod is arranged on the described valve seat disk;

Upper and lower flap is serially connected on the described valve rod and also can moves along the direction vertical with drainage direction.

Description of drawings

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 is the structural representation of traditional single valve lobe start-stop device;

Fig. 2 is the structural representation of bivalve lobe start-stop device of the present utility model;

Fig. 3 provides the partial schematic diagram of valve seat among Fig. 2;

Embodiment

See also Fig. 2, bivalve lobe start-stop device of the present utility model still comprises the valve seat 21 and the floating ball device 25 of an installing valve seat disk 26, improvements are, valve rod 24 upper-lower positions of valve seat disk 26 establish two separation on flap 22 and lower Disc 23, floating ball device 25 is connected the upper end of valve rod 24 by lever 27, floating ball device 25 is fixed on the lever 27 like this, and lever 27 moves up and down by the rotating shaft drive floating ball device 25 that is serially connected on the valve rod 24; Valve seat 21 is fixedlyed connected with valve seat disk 26, and 21 of valve seats directly link to each other by the effective sealing and fixing of screw thread and with drain opening with valve body, and the 23 edge directions vertical with drainage direction of last flap 22, lower Disc that are serially connected on the valve rod 24 are moved.

The valve seat schematic representation that provides from Fig. 3 as can be known, along with the variation of condensing capacity, the position of ball float changes up and down.Act on the valve opening force F on the flap 22 ₁With the pass valve power F on the lower Disc 23 ₂, be respectively:

F ₁＝A ₁P (1)

F ₂＝A ₂P (2)

In above-mentioned formula, A ₁, A ₂The sectional area of expression respective action face; P is a pressure medium, and is given when design, A ₁=A ₂Therefore, F ₁=F ₂

Because F ₁, F ₂Be the power of two opposite equivalences of direction, thereby cancel each other, make the ball float of drain valve have external force to close slightly, ball float and valve volume can suitably reduce when therefore designing, and promptly small-sized valve just can obtain the continuous drainage of big discharge capacity.

In addition, the change of upper and lower flap 22,23 moving direction can be raised the position of ball float or the sealing area between increase flap and valve seat (dish), as much as possible to increase water displacement; And the sealing surface of upper and lower two flaps 22,23 and valve seat 21 is all through grinding assembling and be linear motion, and opening and closing simultaneously can guarantee the sealability of valve, even condensation water quantity seldom, the steam flow of leakage is also minimum.

Claims (1)

1, a kind of bivalve lobe start-stop device of Automatic steam trap Trap comprises that one is arranged on the valve seat disk and a floating ball device that is connected by lever on the valve seat, it is characterized in that described device further comprises:

Valve rod is arranged on the described valve seat disk;

Upper and lower flap is serially connected on the described valve rod and also can moves along the direction vertical with drainage direction.