CN201420878Y

CN201420878Y - Low hydraulic resistance track type plunger valve

Info

Publication number: CN201420878Y
Application number: CN2009200329070U
Authority: CN
Inventors: 杨静鸣
Original assignee: Xi'an Pump & Valve General Factory Co Ltd
Current assignee: Xi'an Pump & Valve General Factory Co Ltd
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2010-03-10
Anticipated expiration: 2019-04-30

Abstract

The utility model relates to a low hydraulic resistance track type plunger valve. Currently in China, some pipelines for conveying polymer compound melt, such as a polyester pipeline, adopt the plunger valve imported from overseas, and the structure is as follows: the end of a plunger is provided with a conical surface or an inclined surface which is similar to the shape of the inner cavity of a valve as far as possible, so the dead corners in the cavity are reduced. However, the opening and the closing positions of the valve plunger cannot be ensured to be consistent with the shape of the inner cavity of the valve, and dead corners still exist. The utility model aims to develop a low hydraulic resistance track type plunger valve, and structurally comprises a valve, a plunger, a guide plate, a guide sleeve, a valve stem, a sealing part and an installation part, wherein a support is provided with a rotary mechanism; the end surface of the plunger is processed into an arc-shaped curved surface so that the end surface of the plunger forms a smooth continuous runner with the inner cavity of the valve at the opening and the closing positions. The purpose is as follows: the low hydraulicresistance track type plunger valve is applicable to the opening, the closing and the switching valves on the pipelines for conveying high-viscosity media, and has the advantages of smooth and continuous valve cavity runner, no dead corner and small hydraulic resistance.

Description

Low flow resistance rail mounted plunger valve

Technical field

The utility model relates to a kind of plunger valve, promptly is suitable for the low flow resistance rail mounted plunger valve that uses on the medium pipeline of transfer of highly viscous.The utility model be about a kind of open or the throttle down process in make the plunger rotation through rotating machinery, finally make plunger seal end end face constitute the plunger valve of smooth continuous runner at unlatching or closed position and body cavity.

Background technique

In carrying the polymeric compound melt pipe, because its medium high viscosity and chemical characteristics, require the valve pressure drop less than 0.03MPa, the valve cavity smooth transition, there is not any dead angle, do not allow medium at valve cavity the turbulent flow of interruption to be arranged, it is residual more not allow medium, and residual medium will go bad influences end product quality.Resistance is crossed the operational efficiency that senior general reduces device.So, the pipeline of more domestic conveying polymeric compound melts, as the plunger valve that adopts external import is arranged on the polyester pipeline, its main structure characteristics are: plunger end is the conical surface or the inclined-plane approaching with the body cavity shape of design as far as possible, reduces the interior dead angle of cavity.But, do not possess in valve piston opening and closing position and all to guarantee consistently with the body cavity shape, still have the dead angle existence.

Announced a kind of " sheath buckle type pressure-limit valve " patent in 2008.01.23 on the net in State Intellectual Property Office, it is made up of plunger valve pocket, cylindroid helicalcoil compression spring and three parts of hexagon head latch bracket, the oral area of plunger valve pocket has together to the round edge that turns up, the oral area of hexagon head latch bracket has the round edge that inwardly turns over together, the plunger valve pocket can be in the hexagon head latch bracket line activities freely.It exists in problems such as unreasonable structure on the medium pipeline of transfer of highly viscous, fluid resistance be big.

Summary of the invention

The purpose of this utility model is the problem that exists at prior art, and a kind of low flow resistance rail mounted plunger valve is provided, and reaching on the medium pipeline of transfer of highly viscous inner chamber smooth transition, inner chamber does not have dead angle, long service life, purpose that the fluid flow effect is good.

The technical solution of the utility model: low flow resistance rail mounted plunger valve, form by assembling rotating machinery on the valve body, it is characterized in that: rotating machinery is installed on the valve body that has import and export, rotating machinery is made up of plunger, guide plate, guide sleeve, valve rod and support, guide sleeve and support are fixed by bolts to the valve body side in rotating machinery, the guide sleeve internal surface is processed with spiral chute, guide plate and plunger one end, the valve rod one end separate piece that is composed of a fixed connection, but the guide plate periphery of move left and right is formed screw pair with fixing guide sleeve spiral chute engagement.

The technical solution of the utility model also comprises:

Described low flow resistance rail mounted plunger valve is characterized in that: there is the plunger seal end that reduces the flow resistance effect end of plunger, and the curved curved surface of plunger seal end face matches with the body cavity shape.

The beneficial effects of the utility model are, can make plunger in valve opening and closed position and body cavity formation continuous light slip-stream road, all can guarantee to match with closed position at valve opening with the body cavity shape is consistent, the valve pressure drop is less than 0.03MPa, make the medium smooth flow, no dead angle exists, and reduces the residue of medium at body cavity, avoids medium rotten and influence mass of medium.

Description of drawings

Fig. 1 is an overall structure sectional view of the present utility model.

Fig. 2 is a rotating machinery partial enlarged drawing of the present utility model.

Fig. 3 is an A-A sectional view among Fig. 2.

Above-mentioned number in the figure explanation: 1, valve body, 2, plunger, 3, guide plate, 4, guide sleeve, 5, valve rod, 6, support, 7, the plunger seal end.

Embodiment

Low flow resistance rail mounted plunger valve as shown in Figure 1, simultaneously referring to Fig. 2, all part is made up of valve body 1, plunger 2, plunger seal end 7, guide plate 3, guide sleeve 4, valve rod 5, support 6 and Sealing and assembling set.Wherein form the rotating machinery assembly by plunger 2, guide plate 3, guide sleeve 4, valve rod 5, support 6 and plunger end 7.Rotating machinery assembly with spline structure is installed in valve body 1 both sides that have import and export, and guide sleeve 4 and support 6 are fixed by bolts to valve body 1 side, and the status requirement when closing and opening according to plunger on the guide sleeve 4 is processed with spiral chute; Guide plate 3 is fixedlyed connected with plunger 2 one ends, valve rod 5 one ends, but guide plate 3 peripheries of move left and right and fixing guide sleeve 4 spiral chutes engagement are formed screw pair.Arrow is represented fluid flow direction among the figure, makes plunger seal end 7 end faces and body cavity import and export constitute smooth continuous runner in unlatching or closed position.The valve that Fig. 1 shows is in left passage and opens right pathway closure state.

Referring to Fig. 2 and shown in Figure 3, plunger seal end 7 end faces are processed into size according to valve body 1 intracavity diameter and equate or close arc-shaped curved surface, that is to say according to valve body 1 intracavity diameter Φ and be processed into similar in appearance to the circular arc camber of 90 ° of elbow internal surfaces at the end face of plunger seal end 7, purpose is to reduce the resistance that fluid flows, and increases fluid mobility.R among the figure equates that with valve body 1 radius (Φ/2) R equates with valve body 1 diameter of phi.

Working principle is: when closing or during Open valve, driving valve rod 5 by common driving mechanism rotates, valve rod 5 drives plunger 2, by guide plate 3 under guide sleeve 4 spiral chute effects, do rotation and reciprocal compound motion simultaneously, plunger 2 is rotated in the opening and closing process at valve 1, and the plunger seal end 7 of plunger 2 ends constitutes smooth continuous runner in unlatching or closed position and valve body 1 inner chamber.The rotating machinery that key technology is made up of guide sleeve, guide plate, plunger and plunger seal end, and plunger seal end 7 end faces are processed into the equal or close arc-shaped curved surface of size according to valve body 1 intracavity diameter.

Claims

1, low flow resistance rail mounted plunger valve, going up the assembling rotating machinery by valve body (1) forms, it is characterized in that: rotating machinery is installed on the valve body (1) that has import and export, rotating machinery is by plunger (2), guide plate (3), guide sleeve (4), valve rod (5) and support (6) are formed, guide sleeve in rotating machinery (4) and support (6) are fixed by bolts to valve body (1) side, guide sleeve (4) internal surface is processed with spiral chute, guide plate (3) and plunger (2) one ends, valve rod (5) the one ends separate piece that is composed of a fixed connection, but the guide plate of move left and right (3) periphery is formed screw pair with fixing guide sleeve (4) spiral chute engagement.

2, low flow resistance rail mounted plunger valve according to claim 1 is characterized in that: there is the plunger seal end (7) that reduces the flow resistance effect end of plunger (2), and the curved curved surface of plunger seal end (7) face matches with valve body (1) cavity shape.