CN202580081U

CN202580081U - Pressure regulating automatic gate valve

Info

Publication number: CN202580081U
Application number: CN 201220252987
Authority: CN
Inventors: 葛天民
Original assignee: ZHEJIANG ZHONGCHAO INDUSTRY ENDOSCOPY Co Ltd
Current assignee: ZHEJIANG ZHONGCHAO INDUSTRY ENDOSCOPY Co Ltd
Priority date: 2012-05-29
Filing date: 2012-05-29
Publication date: 2012-12-05
Anticipated expiration: 2022-05-29

Abstract

The utility model relates to a gate valve, in particular to an automatic gate valve which can be opened and closed by using pressure of a conveying medium. The valve comprises a valve body, a valve cover, a valve rod and a gate, wherein the gate is arranged in a valve cavity of the valve body; a feed channel and a discharge channel are respectively formed on the two sides of the valve cavity; a valve seat is arranged in the valve cavity; the lower end of the valve rod penetrates through the valve cover and is inserted into an inner cavity of the valve body; and the gate is fixed at the lower end of the valve rod and in open or close fit with the valve seat. The valve is characterized by also comprising a valve rod driving oil cylinder, a change-over switch, and a flow regulating valve in the discharge channel of the valve body. Compared with the prior art, the pressure regulating automatic gate valve has the advantages that the flow regulating valve is arranged in the discharge channel of the valve body and used for regulating the outlet flow of the valve, so that an enough pressure difference is formed between the feed channel and the outlet of the flow regulating valve when the valve is in a full open state, and enough pressure is provided for automatically closing the valve; and therefore, the valve has a simple structure, is small in size and works reliably.

Description

The pressure regulating type Automatic slucie valve

Technical field

The utility model relates to a kind of gate valve, particularly can utilize fed sheet of a media pressure to carry out the pressure regulating type Automatic slucie valve of opening and closing.

Background technique

Valve belongs to pressure-vessel; The medium of transporting has certain pressure, and reliable in order to guarantee transporting medium process safe, the closure member of gate valve has all adopted bigger seal pressure; Thereby in the opening-closing process of valve, need very big moment of torsion and opening force, it is very big to make the operator expend muscle power.In order to raise labour efficiency, alleviate operator's physical output, that existing valve usually adopts is electronic, surge or control device such as pneumatic comes Open valve, has also all received significant effect aspect operator's the physical output raising labour efficiency and alleviate.But above-mentioned three kinds of control device are respectively as controlling the energy with electric energy, liquid, gas; Therefore can consume certain energy; The Electric actuator, hydraulic pressure installation, the Pneumatic actuator that increase simultaneously make the overall volume of valve and weight all increase many; Control the lasting energy for making, also need connect the energy resource supply facility of power supply or peripheral hardware hydraulic station and air compressor and so on, increased a lot of costs.And when the pipeline that valve is housed did not have electrical environment through wilderness, above-mentioned three kinds of devices just can not be used, and have to operate with muscle power, and labor intensity is big.Valve is when the transporting medium; Since valve in off position the time before the valve with valve after medium bigger pressure difference is arranged; Can utilize the piston that is fixedly connected with valve rod, thereby promote that piston drives that valve rod rises and with valve open through the forward and backward pressure difference of valve, and when valve is in the state of standard-sized sheet; Owing to almost do not have pressure difference before the valve and between the medium behind the valve, therefore how to utilize the pressure medium of conveying is technological difficulties with valve closing always.In order to address the above problem; Being called " liquid formula Automatic slucie valve ", application number in the name of on December 1st, 2010 application is to disclose a kind of Automatic slucie valve in 201010567877.0 the utility model patent; Automatic slucie valve comprises valve body, valve gap, valve rod and flashboard and valve rod driving oil cylinder and throw over switch; Said oil cylinder inside is provided with small one and large one the first piston chamber and second piston cavity of cross section of mutual UNICOM; Be respectively equipped with the first piston and second piston in the first piston chamber and second piston cavity, the first piston and second piston are fixed on and form interlock on the same piston rod, and said piston rod one end and valve rod upper end are connected.The pressure regulating type Automatic slucie valve has the valve rod driving oil cylinder and the throw over switch of different cross section piston through setting; Utilize the difference of piston cross-section, under different state, the different piece of valve rod driving oil cylinder inner chamber and feed cavity and discharging chamber UNICOM have been reached opened by pressure and the closing gate valve that utilizes the medium of being carried through throw over switch.Utilize the pressure medium of self carrying to carry out opening and closing though this pressure regulating type Automatic slucie valve can solve, it is complicated that structure still shows, and volume is bigger.

Summary of the invention

The purpose of the utility model is for the deficiency that overcomes existing technology the Automatic slucie valve that a kind of structure glue is simple more, volume is littler to be provided.

For realizing above-mentioned purpose, the utility model provides a kind of pressure regulating type Automatic slucie valve, comprises valve body, valve gap, valve rod and flashboard; Said flashboard is arranged in the valve pocket of valve body, and the valve pocket both sides are feeding-passage and tapping channel, is provided with valve seat in the valve pocket; Said valve rod lower end is passed valve gap and is got into body cavity, and said flashboard is fixed on the valve rod lower end and cooperates with valve seat formation open and close, it is characterized in that: also be provided with valve rod driving oil cylinder and throw over switch; Said oil cylinder inside is provided with piston, and said piston is separated into airtight upper piston chamber and lower piston chamber with cylinder cavity, the setting that can endwisely slip of said valve rod; The upper end is fixedly connected with the inner piston of said oil cylinder, is provided with flow control valve in the tapping channel of said valve body, and throw over switch is provided with first import, second import and first outlet, second outlet; Said first import and feeding-passage UNICOM, the outlet side passage UNICOM of second import and flow control valve, said first outlet and upper piston chamber UNICOM; Second outlet and lower piston chamber UNICOM, said throw over switch has two states of opening and closing, in off position down; First import of said throw over switch and the first outlet UNICOM, second import and the second outlet UNICOM are under opening state; First import of said throw over switch and the second outlet UNICOM, second import and the first outlet UNICOM.

Compared with prior art; This pressure regulating type Automatic slucie valve makes when valve is full-gear through in the tapping channel of valve body, being provided with the rate of discharge of flow control valve regulating valve, still has enough pressure differences between feeding-passage UNICOM and the Flow-rate adjustment valve outlet port; For closing the pressure that provides enough automatically; Therefore the valve rod driving oil cylinder structure of the utility model is more simple, and volume is littler, and it is more reliable to work.

Further setting as the utility model; Said valve rod driving oil cylinder comprises a tubular cylinder body and loam cake; Said tubular cylinder body is arranged on the valve gap and constitutes airtight cylinder cavity with loam cake, and said loam cake and valve gap edge are respectively equipped with the pipeline with upper piston chamber and lower piston chamber UNICOM.Like this be arranged so that valve rod driving oil cylinder structure is comparatively compact, volume is less, and is simple in structure.

As further being provided with again of the utility model, said throw over switch can be constituted or is made up of switch valve with two-position and five-pass by two-position four way change valve, and wherein two import UNICOMs use.Convenient like this employing has commercially available matured product now.

Further setting as the utility model; Said pressure regulating type Automatic slucie valve also is provided with hand-operating device; Said hand-operating device comprises upper valve rod, handwheel, hand wheel shaft and the actuation gear that is connected with lower end and valve rod; Said upper valve rod surface is provided with rack structure vertically, and said handwheel and actuation gear are separately positioned on the hand wheel shaft two ends, said actuation gear and rack structure engagement.Can avoid like this can't the opening and closing valve when the valve rod driving oil cylinder breaks down.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Description of drawings

Accompanying drawing 1 is the utility model specific embodiment structure sectional view;

Accompanying drawing 2-4 is the different specific embodiment structure of a utility model flow control valve sectional view.

Embodiment

As shown in Figure 1; The pressure regulating type Automatic slucie valve still comprises valve body 1, valve gap 2, valve rod 8, flashboard 3, valve rod 8 driving oil cylinder 4 and throw over switch 5 and flow control valve 6, and valve body 1 inner chamber both sides are provided with feeding-passage 101 and tapping channel 102, and valve gap 2 covers at valve body 1 top; Valve body 1 inner chamber both sides are provided with valve seat 7; Said valve rod 8 lower ends are passed valve gap 2 and are got into valve body 1 inner chamber, and said flashboard 3 is fixed on valve rod 8 lower ends and valve seat 7 matches, along with the upper and lower motion formation open and close cooperation of valve rod 8.Flow control valve 6 is arranged in the tapping channel 102 of said valve body 1.In this specific embodiment; Said valve rod driving oil cylinder 4 comprises a tubular cylinder body 401 and loam cake 402; Said tubular cylinder body 401 is arranged on the valve gap 2 and constitutes airtight cylinder cavity with loam cake 402, and piston 403 is arranged on wherein, and said valve rod 8 is the setting that can endwisely slip of polished rod structure; Said valve rod 8 upper ends are stretched into cylinder cavity and are fixedly connected with piston 403; Said piston 403 is separated into airtight upper piston chamber and lower piston chamber with cylinder cavity, and said loam cake 402 and valve gap 2 edges are respectively equipped with the pipeline with upper piston chamber and lower piston chamber UNICOM, and the interface of pipeline is arranged on to make things convenient on the circumferential surface of said loam cake 402 and valve gap 2 and is connected with throw over switch 5.Like this be arranged so that valve rod driving oil cylinder 4 structures are comparatively compact, volume is less, and is simple in structure.Throw over switch 5 requires to be provided with first import, second import and first outlet, second outlet, the A point UNICOM of said first import and feeding-passage 101, the B point UNICOM of the outlet side passage of second import and flow control valve 6; Said first outlet and upper piston chamber UNICOM, second outlet and lower piston chamber UNICOM, said throw over switch 5 has two states of opening and closing; In off position down; First import of said throw over switch 5 and the first outlet UNICOM, second import and the second outlet UNICOM are under opening state; First import of said throw over switch 5 and the second outlet UNICOM, second import and the first outlet UNICOM.Specifically can select two-position four way change valve or switch valve with two-position and five-pass, shown in accompanying drawing 1, when selecting switch valve with two-position and five-pass for use, can two import UNICOMs wherein be got up.

Flow control valve 6 in the utility model can be various valves that can control flow rate, like ball valve, butterfly valve, stopcock and conisphere valve etc., referring to Fig. 2-4.

Can't the opening and closing valve when valve rod driving oil cylinder 4 breaks down; This pressure regulating type Automatic slucie valve also is provided with hand-operating device 9, and said hand-operating device 9 comprises upper valve rod 901, handwheel (not illustrating among the figure), hand wheel shaft 902 and actuation gear 903, and hand-operating device 9 is arranged on the top of loam cake 402; The lower end of said upper valve rod 901 passes that loam cake 402 and valve rod 8 be connected; The surface is provided with rack structure vertically, and said handwheel and actuation gear 903 are separately positioned on hand wheel shaft 902 two ends, and said hand wheel shaft 902 is perpendicular with upper valve rod 901; Said actuation gear 903 and rack structure engagement, and be provided with shell 904 protections.

For fear of the vacuum damping effect that produces, when valve rod driving oil cylinder 4 is packed piston 403 into, can inject the pressurized air of 0.01MPa simultaneously in upper piston chamber and lower piston chamber; Piston 403 is in state of equilibrium when making original state; Under promoting at pressure medium, when piston 403 moves down, cavity of resorption air compression state; At this moment come down to liquid gas in the epicoele and mix, cavity of resorption also is a liquid gas admixture.With this way mainly is to overcome in piston 403 upper and lower moving process the vacuum damping effect of generation.

The working principle of this pressure regulating type Automatic slucie valve is following: as shown in Figure 1; Valve is a closed condition when supposing beginning; At this moment; The A point of feeding-passage 101 is through first import, first outlet and upper piston chamber interface C point UNICOM of throw over switch 5; The B point of outlet side passage is through second import, the second outlet UNICOM and lower piston chamber interface D point UNICOM of throw over switch 5, because the pressure that the A of feeding-passage 101 is ordered is greater than the pressure of outlet side channel B point, piston 403 moves down drive valve rod 8 and flashboard 3 decline throttle downs under the pressure of medium; When the needs Open valve; The spool of pulling throw over switch 5 is converted to opening state; At this moment, feeding-passage 101A point is through first import, second outlet and lower piston chamber interface D point UNICOM of throw over switch 5, and outlet side channel B point is through second import, first outlet and upper piston chamber interface C point UNICOM of throw over switch 5; Because the feeding-passage 101A pressure of order is greater than the pressure of outlet side channel B point, piston 403 shipper pole ovable valve stem 8 and flashboard 3 rising Open valves under the pressure of medium; When valve need be closed; Toward the spool that promotes throw over switch 5 in the other direction; At this moment, the A of feeding-passage 101 point is through first import, first outlet and upper piston chamber interface C point UNICOM of throw over switch 5, and outlet side channel B point is through second import, the second outlet UNICOM and the lower piston chamber interface D point UNICOM of throw over switch 5; Because in advance can be through the rate of discharge of 6 in flow control valve 6 modulating valve; Make that when the pressure regulating type Automatic slucie valve is full-gear still have enough pressure differences between feeding-passage 101 UNICOMs and flow control valve 6 outlets, piston 403 moves down and drives valve rod 8 and flashboard 3 decline throttle downs under the pressure of medium.

Claims

1. a pressure regulating type Automatic slucie valve comprises valve body, valve gap, valve rod and flashboard, and said flashboard is arranged in the valve pocket of valve body; The valve pocket both sides are feeding-passage and tapping channel, are provided with valve seat in the valve pocket, and said valve rod lower end is passed valve gap and got into body cavity; Said flashboard is fixed on the valve rod lower end and cooperates with valve seat formation open and close, and it is characterized in that: also be provided with valve rod driving oil cylinder and throw over switch, said oil cylinder inside is provided with piston; Said piston is separated into airtight upper piston chamber and lower piston chamber with cylinder cavity, the setting that can endwisely slip of said valve rod, and the upper end is fixedly connected with the inner piston of said oil cylinder; Be provided with flow control valve in the tapping channel of said valve body, throw over switch is provided with first import, second import and first outlet, second outlet, said first import and feeding-passage UNICOM; The outlet side passage UNICOM of second import and flow control valve, said first outlet and upper piston chamber UNICOM, second outlet and lower piston chamber UNICOM; Said throw over switch has two states of opening and closing, in off position down, and first import of said throw over switch and the first outlet UNICOM; Second import and the second outlet UNICOM; Under opening state, first import of said throw over switch and the second outlet UNICOM, second import and the first outlet UNICOM.

2. pressure regulating type Automatic slucie valve according to claim 1; It is characterized in that: said valve rod driving oil cylinder comprises a tubular cylinder body and loam cake; Said tubular cylinder body is arranged on the valve gap and constitutes airtight cylinder cavity with loam cake, and said loam cake and valve gap edge are respectively equipped with the pipeline with upper piston chamber and lower piston chamber UNICOM.

3. pressure regulating type Automatic slucie valve according to claim 1 is characterized in that: said throw over switch is made up of two-position four way change valve.

4. pressure regulating type Automatic slucie valve according to claim 1 is characterized in that: said throw over switch is made up of switch valve with two-position and five-pass, and wherein two import UNICOMs use.

5. pressure regulating type Automatic slucie valve according to claim 1; It is characterized in that: said pressure regulating type Automatic slucie valve also is provided with hand-operating device; Said hand-operating device comprises upper valve rod, handwheel, hand wheel shaft and the actuation gear that is connected with lower end and valve rod; Said upper valve rod surface is provided with rack structure vertically, and said handwheel and actuation gear are separately positioned on the hand wheel shaft two ends, said actuation gear and rack structure engagement.