CN204176109U - A kind of flow regulator of combined type pneumatic gate valve - Google Patents

Abstract

The utility model discloses a kind of flow regulator of combined type pneumatic gate valve, comprise handwheel, bearing support, screw, screw mandrel, moving plate, still and pointer, screw mandrel is set with successively handwheel, clutch shaft bearing seat, screw and the second bearing support, moving plate is located at above screw mandrel, still is located on the right of screw mandrel, and pointer is located at moving plate top edge.The utility model decreases the moment of rotation of adjust flux, and the linear properties of flow and valve shaft corner improves, flow control valve is had turn-off function.

Description

A kind of flow regulator of combined type pneumatic gate valve

Technical field

The utility model relates to a kind of flow regulator, is specifically related to a kind of flow regulator of combined type pneumatic gate valve.

Background technique

Self-operated flow control valve has flow set and regulates and keep constant flow two kinds of functions.And the realization of these two functions is completed by two-part component in valve.In flow set adjustment, mainly contain the valve of two kinds of structures in the market, one is pivoted housing formula switch-mode regulation structure, this structure relies on pivoted housing change its flow area in main valve body radial direction and change flow, certain interval must be had to be convenient to manually due to pivoted housing and valve body or use electric actuator to drive, the existence in this gap just makes leakage rate inevitably increase, therefore rotating sleeve is difficult to close completely.Another kind of structure is coning plug structure, and this structure can realize turning off but be exert pressure by screw rod due to it, and can only determine opening degree by number of turn-taking when controlling flow, flow indication is very indefinite.

After flow set is good, drive floating valve plug throttling, pressure regulation by pressure feedback by the effect of Regulation spring, diaphragm by second portion, keep constant flow constant.

Traditional self-operated flow control valve focuses on the performance ensureing that rate-of flow is constant, but cuts off rate-of flow completely under can not ensureing off state, thus does not have shutoff effect, and vent flow is still very large under many circumstances.In engineering, just must increase a shut-off valve like this, this will increase cost and installing space.

Model utility content

The utility model provides a kind of flow regulator of combined type pneumatic gate valve, to solve the malfunctioning technical problem of existing flow regulator Flow-rate adjustment.

In order to solve above technical problem, the technological scheme that the utility model is taked is:

A kind of flow regulator of combined type pneumatic gate valve, comprise handwheel, bearing support, screw, screw mandrel, moving plate, still and pointer, screw mandrel is set with successively handwheel, clutch shaft bearing seat, screw and the second bearing support, moving plate is located at above screw mandrel, still is located on the right of screw mandrel, and pointer is located at moving plate top edge.

The utility model beneficial effect is embodied in: the moment of rotation one, decreasing adjust flux.Because its frictional force smooth of plane machining is just very little, just to turn nested structure much little than traditional for moment of rotation, and this can save very large cost for the valve controlled by electric actuator.Two, the linear properties of flow and valve shaft corner improves, and because the hole in plane is easy to be processed into rule or gradual change form, make the corresponding flow that turns an angle, linear properties easily controls and realizes, and makes flow scale more regular.Three, the turn-off function that flow control valve had.This type of traditional valve does not possess turn-off function, and vent flow is very large, even if be adjusted to by flow minimum, still can not meet usage requirement.A cutting-off valve must be installed again additional when needs turn off rate-of flow, the application of Flow valve is restricted, installing space and overall cost also corresponding increase.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

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

In figure, 1 handwheel, 21 clutch shaft bearing seats, 22 second bearing supports, 3 screws, 4 screw mandrels, 5 moving plates, 6 stills, 7 pointers.

Embodiment

For making the object of the utility model embodiment, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.

As shown in Figure 1, the utility model comprises handwheel 1, bearing support 21,22, screw 3, screw mandrel 4, moving plate 5, still 6 and pointer 7, screw mandrel 4 is set with successively handwheel 1, clutch shaft bearing seat 21, screw 3 and the second bearing support 22, moving plate 5 is located at above screw mandrel 4, still 6 is located on the right of screw mandrel 4, and pointer 7 is located at moving plate 5 top edge.

When shaking handwheel 1 and rotating, screw 3 drives moving plate 5 to sit orientation movement, manually learns gatage value by observation.Manually can calculate by (3-1) formula or table look-up and control aperture size, coordinate the object reaching and control flow with flow control device.

$Q=\frac{1}{2}{\mathrm{Ka}}^2{\mathrm{gt}}^{2}P---(3-1)$

In formula, Q-flow, K-filling index, g-gravity accleration, t-time, P-unit weight.

Last it is noted that above embodiment only illustrates the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment's technological scheme of the utility model.

Claims (1)

1. the flow regulator of a combined type pneumatic gate valve, it is characterized in that, comprise handwheel, bearing support, screw, screw mandrel, moving plate, still and pointer, described screw mandrel is set with successively handwheel, clutch shaft bearing seat, screw and the second bearing support, described moving plate is located at above described screw mandrel, described still is located on the right of described screw mandrel, and described pointer is located at described moving plate top edge.