CN204785002U - Choke valve - Google Patents

Abstract

The utility model discloses a choke valve, which comprises the following components: a valve body, be equipped with the fluid cavity in the valve body, be equipped with the disk seat on the valve body wall in the fluid cavity, be equipped with the case on the disk seat, be equipped with the valve rod on the case, still be equipped with the cavity that encloses by the valve body wall in the valve body, be equipped with the through -hole with the fluid cavity intercommunication on the valve body wall of cavity, sliding connection has the rack on the valve body wall of through -hole, be equipped with first spring between the other end of rack and the cavity internal valve body wall, rack toothing has the gear, be connected with the actuating lever on the gear, one side of actuating lever is equipped with the dog, the other end of dog pass that the valve body wall is established in the fluid cavity and with valve body wall sliding connection, the dog is close to and is connected with the second spring between one end and the valve body wall of actuating lever, an object of the utility model is to provide a choke valve of adjustable running water pressure.

Description

A kind of throttle valve

Technical field

The utility model relate to a kind of valve, has been specifically related to a kind of throttle valve.

Background technique

Tap water refers to the water for people's life, production and application meeting respective standard by producing after water treatment plants purification, sterilization.Domestic water draws rivers and lakes and underground water mainly through the water intake pumping station of water factory, surface water, by waterworks according to " national Drinking Water related sanitary standard ", through the process of the technological processes such as precipitation, sterilization, filtration, be transported to each user finally by Energy Saving Measures of Pumping Station.

Using water pump to transport in the process of tap water, there is various problem in the pressure instability that usually can export because of water pump; if pressure increases suddenly; flow velocity from the beginning just increases thereupon, due to the inertia of tap water, and the words that flow velocity is too fast; tap water will produce collision to pipeline; occur liquid hit phenomenon, the lighter makes pipeline generation tremble, and severe one pipeline will break; cause tap water to leak, cause water resource waste.

Model utility content

The purpose of this utility model is the throttle valve providing a kind of adjustable tap water pressure.

The technical solution of the utility model is: a kind of throttle valve, comprise valve body, fluid chamber is provided with in valve body, valve body wall in fluid chamber is provided with valve seat, valve seat is provided with spool, spool is provided with valve rod, the cavity surrounded by valve body wall is also provided with in valve body, the valve body wall of cavity is provided with the through hole be communicated with fluid chamber, the valve body wall of through hole slidably connects tooth bar, the first spring is provided with between the other end of tooth bar and cavity internal valve body wall, tooth bar is engaged with gear, gear is connected with driveshaft, the side of driveshaft is provided with block, the other end of block to be located in fluid chamber through valve body wall and to be slidably connected with valve body wall, block is connected with the second spring near between one end and valve body wall of driveshaft.

The beneficial effects of the utility model are: actuate valve stem, valve rod are moved, valve open to the direction away from valve seat, start water pump, and tap water flows from the hole of valve inlet by valve seat to valve export; Part tap water can be diverted in through hole, and is filled by through hole, because tap water has certain pressure, slides, and make the first spring be in compressive state so the tap water in through hole can press tooth bar; Tooth bar moves to the direction away from through hole, actuation gear rotates by tooth bar, gear will drive driveshaft to rotate, driveshaft and block offset away from one end of fluid chamber, and pressing block, the other end of block moves in fluid chamber, and the flow area through block of fluid is reduced, thus the flow controlled from the beginning, now the second spring is in compressive state.

If the pressure of water pump increases suddenly, stem position is constant, is increased by the flow of the fluid of valve seat orifice; The pressure of the tap water in through hole increases, tap water moves again pressing tooth bar to the direction away from through hole, tooth bar again driven gear further rotates, and gear driven driveshaft rotates, and driveshaft drives block to move in fluid chamber, block will reduce the flow area through block of fluid further, and make its flow keep substantially constant, thus make its maintain constant pressure, and then solution pressure raises suddenly, the liquid hit phenomenon that tap water brings to pipeline, reaches the effect regulating pressure.

The setting of the first spring, can make water-aspirator pressure from be elevated to reduction or water-aspirator pressure decline time, tooth bar is resetted, and make gear and driveshaft reset; The setting of the second spring, can make in water-aspirator pressure from when being elevated to the decline of reduction water-aspirator pressure, help block resets.

Further: between tooth bar and cavity internal valve body wall, to be provided with seal ring.The setting of seal ring, can ensure that tap water can not bleed in cavity.

Further: block is provided with arc plate near one end of driveshaft.Because gear driven driveshaft moves, so the track of driveshaft motion is arc, the setting of arc plate, can reduce the friction between driveshaft and block, extends the working life of block and arc plate.

Further: valve rod upper end is provided with runner.The setting of runner, facilitates people's operated valve, laborsavingly saves time.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of a kind of throttle valve embodiment one of the utility model.

Embodiment

Below by embodiment, the utility model is described in further detail:

Reference character in Figure of description comprises: valve body 1, through hole 2, valve inlet 3, valve rod 4, runner 5, valve seat 6, valve export 7, block 8, arc plate 9, driveshaft 10, gear 11, tooth bar 12, first spring 13, seal ring 14, second spring 15, spool 16, fluid chamber 17, cavity 18.

Embodiment is substantially as shown in Figure 1: a kind of throttle valve, comprise valve body 1, fluid chamber 17 is provided with in valve body 1, valve body 1 wall in fluid chamber 17 is provided with valve seat 6, valve seat 6 is provided with spool 16, spool 16 is provided with valve rod 4, valve rod 4 upper end is provided with runner 5, the cavity 18 surrounded by valve body 1 wall is also provided with in valve body 1, cavity 18 is located at the below of fluid chamber 17, valve body 1 wall of cavity 18 is provided with the through hole 2 be communicated with fluid chamber 17, valve body 1 wall of through hole 2 slidably connects tooth bar 12, the first spring 13 is provided with between the right-hand member of tooth bar 12 and cavity 18 inner valve body 1 wall, seal ring 14 is provided with between tooth bar 12 and cavity 18 inner valve body 1 wall, tooth bar 12 is engaged with gear 11, gear 11 is connected with driveshaft 10, the upper left of driveshaft 10 is provided with block 8, block 8 lower end is provided with arc plate 9, the upper end of block 8 to be located in fluid chamber 17 through valve body 1 wall and to be slidably connected with valve body 1 wall, the second spring 15 is connected with between block 8 lower end and valve body 1 wall.

Rotating wheel 5, runner 5 actuate valve stem 4, makes valve rod 4 move to the direction away from valve seat 6, valve open, starts water pump, and tap water flows from the hole of valve inlet 3 by valve seat 6 to valve export 7; Part tap water can be diverted in through hole 2, and through hole 2 is filled, the tap water in through hole 2 can press tooth bar 12 and slide to the right, the seal ring 14 in through hole 2 between valve body 1 wall and tooth bar 12, can prevent tap water from entering in cavity 18, and make the first spring 13 be in compressive state; Actuation gear 11 is rotated counterclockwise by tooth bar 12, drive driveshaft 10 rotates counterclockwise by gear 11, driveshaft 10 offsets with block 8 one end away from fluid chamber 17, and press block 8, the other end of block 8 moves in fluid chamber 17, and the flow area when block 8 of fluid is reduced, thus control flow from the beginning, now the second spring 15 is in compressive state.

If the pressure of water pump increases suddenly, valve rod 4 invariant position, is increased by the flow of the fluid in valve seat 6 hole; The pressure of the tap water in through hole 2 increases, tap water moves again pressing tooth bar 12 to the direction away from through hole 2, tooth bar 12 again driven gear 11 further rotates, gear 11 drives driveshaft 10 to rotate, driveshaft 10 drives block 8 to move in fluid chamber 17, and block 8 will reduce the flow area of fluid when the block 8 further.

When water-aspirator pressure is from when being elevated to reduction, tap water pressure in through hole 2 reduces, first spring 13 will drive tooth bar 12 to left movement, tooth bar 12 is resetted, tooth bar 12 driven gear 11 and driveshaft 10 reset, and driveshaft 10 leaves arc plate 9, and the second spring 15 will move downward, second spring 15 drives block 8 to reset, thus increases the flow area of fluid when block 8.

Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from the utility model structure, some distortion and improvement can also be made; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.

Claims (4)

1. a throttle valve, comprise valve body, fluid chamber is provided with in valve body, valve body wall in fluid chamber is provided with valve seat, valve seat is provided with spool, spool is provided with valve rod, it is characterized in that: in valve body, be also provided with the cavity surrounded by valve body wall, the valve body wall of cavity is provided with the through hole be communicated with fluid chamber, the valve body wall of through hole slidably connects tooth bar, the first spring is provided with between the other end of tooth bar and cavity internal valve body wall, tooth bar is engaged with gear, gear is connected with driveshaft, driveshaft is provided with block away from the side of gear, the other end of block to be located in fluid chamber through valve body wall and to be slidably connected with valve body wall, block is connected with the second spring near between one end and valve body wall of driveshaft.

2. throttle valve according to claim 1, is characterized in that: be provided with seal ring between described tooth bar and cavity internal valve body wall.

3. throttle valve according to claim 2, is characterized in that: described block is provided with arc plate near one end of driveshaft.

4. throttle valve according to claim 3, is characterized in that: described valve rod upper end is provided with runner.