CN2401735Y

CN2401735Y - Buffer valve

Info

Publication number: CN2401735Y
Application number: CN 00213070
Authority: CN
Inventors: 郑海亭
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-04
Filing date: 2000-01-04
Publication date: 2000-10-18
Anticipated expiration: 2010-01-04

Abstract

The utility model discloses a valve, more specifically a buffer valve having the function of buffer opening and closing, which is composed of an oil tank 1, a piston 20, a valve core 14, a valve rod, a valve seat 13, a seal box 6, etc. The buffer valve is characterized in that the tail end of the valve core 14 is provided with a guide frame which is connected with the valve core as a whole, and the guide frame is provided with a water tank. When the valve is opened, the water flow gradually increases, and when the valve is closed, the water flow gradually reduces. The utility model can make the water flow fluctuation in a water pipe connected with the buffer valve small, can make the water pump run normally, and can extend the service life.

Description

Buffer valve

The utility model relates to a kind of valve, the Buffer valve of particularly can open gradually, closing.

Existing hydraulic controlling type water valve, fuel tap, slurry valves, mud valve etc. all are to be opened to maximum or moment closes in moment, make with pipeline that these valves link to each other in, more violent flowing back and forth takes place in its medium, make the running speed of solution feed pump slack-off, moment stops or reversing, usually cause component damage, the motor feels hot even burn out, and had a strong impact on its working life.Some valve also has inconvenient maintenance, and is poorly sealed, often causes profit to mix mutually, and the deficiency of Sealing rapid wear.

The purpose of this utility model provides a kind of Buffer valve that can open gradually or close gradually, so that the pump that is used with this valve can be run well.

The purpose of this utility model reaches by the following technical programs.This valve is made up of oil cylinder, piston, spool, valve rod, valve seat, sealed case etc., and its special way is, establishes the leading truck that is connected as a single entity with it at the afterbody of described spool, is provided with tank on the wall of this leading truck.The structure of tank can be upper and lower wide, also can be that upper opening is little, and lower openings is big, as falling funnel shape, inverted cone.The quantity of tank can be 1,2,3 ..., can set as required.

Sink structure on the leading truck wall is that upper opening is little, and lower openings is big.

Leading truck wall upper flume is the inverted cone tank and is 4.

Valve rod is upper and lower two, and they are connected as a single entity through a connection piece.This link can be a connector, also can be one and connect swivel nut, and can also be to connect latch.

The interior outside at sealed case is equipped with seal arrangement.

In the sealing block of described spool, be provided with the skeleton that increases its intensity.

Because the utility model is at the afterbody of spool, set up the leading truck that is connected as a single entity with it, on this leading truck, be provided with tank, making this valve is to open gradually in the process of opening, the amount of this valve medium of flowing through is increased gradually, be equivalent to valve mutually in the connecting leg off-load of medium increase gradually, equally, during this valve closing, also close gradually, the amount of this valve medium of flowing through is reduced gradually, is zero until flow, be equivalent to valve mutually the medium in the connecting leg pressurize gradually, therefore effectively prevented and valve the be connected as a single entity variation in pressure of medium and the to-and-fro motion (being commonly called as water hammer) of medium in the pipe, and then avoided the influence of water hammer to pump, and the running speed of pump and pressure can be changed in normal scope, prolonged the working life of pump.Secondly, when valve rod being divided into upper and lower two, and when a connection piece is connected as a single entity it, brought convenience to maintenance.After all establishing seal arrangement in the interior outside of sealed case, inner sealing device had both increased sealing effect, the impurity that is stained with on the valve rod, mud etc. have been wiped again off, increased the working life of outer side-sealing device, and because of outer side-sealing device can be from replacing outside the valve gap, easy to maintenance.When sealing block had the sealing block of skeleton for it, increased its working life greatly.

The explanation of accompanying drawing drawing

An embodiment's of Fig. 1-the utility model structural representation

The K of spool leading truck is to view among Fig. 2-Fig. 1

Provide embodiment of the present utility model below in conjunction with accompanying drawing, be used for further specifying technical solution.

Embodiment is with reference to figure 1.Spool 14 is an integral structure with leading truck 14-1, leading truck 14-1 is hollow, evenly be laid with 4 inverted cone tank 14-2 on its perisporium, the terminal socket of spool 14 centers and valve rod, its head is socketed with the sealing block 11 of band skeleton 12, and fixing through pressing plate 10, the water outlet of spool 14 on sealing block 11 closed valve seats 13.Valve rod is divided into upper valve rod 2 and lower valve rod 18, two valve rods connect through link 3 in the cavity outside that valve body 19 forms.Here, link 3 is connectors of a band circumferential groove, and upper and lower valve rod butt joint back forms a boss and two circumferential grooves, and link 3 just in time coincide with it, and the two is connected as a single entity.The other end of upper valve rod 2 is positioned at fuel tank 1, and is connected as a single entity with piston 20.Fuel tank 1 is through oil cylinder cover 21 sealings, and oil cylinder cover 21 is connected with valve body 19 through bolt 17 by locating support 16 location.Between oil cylinder cover 21 and upper valve rod 2,, go out to prevent the oil leakage in the oil cylinder 1 through oil seal 22 and 23 sealings of oil pressure lid.Seal through inside and outside two seal arrangements between sealed case 6 and the lower valve rod 18.Inner sealing device is made up of inner seal ring 7 and internal gland 8.After in the groove of inner seal ring embedding sealed case 6, fixing with internal gland 8 sealings.Inner sealing device plays a part the sealing of first road and strikes off dirt on the valve rod.Outer sealing device is made up of exterior seal ring 5 and outer gland 4, and is fixing through outer gland 4 sealings after the groove of exterior seal ring 5 embedding sealed cases 6 is interior, simultaneously sealed case 6 is fixedly connected on the valve gap 24.Intake pipe 9 is positioned at a side of valve body.Working principle: when opening valve, piston 20 drives on the spool 14 through valve rod and moves, 4 the inverted cone tank 14-2s of water in the valve body on leading truck 14-1 flow out, because the opening of inverted cone tank increases gradually, increases gradually so flow out the water of this valve, the off-load process increases gradually, can prevent effectively thus, open because of water valve is disposable, off-load causes the variation in pressure and the to-and-fro motion of medium in the water pipe too rapidly, and then influences the normal operation of pump.When throttle down, piston 20 drives spool 14 through valve rod and moves down, the water yield that flows out valve reduces gradually, last thoroughly sealing, make the hydraulic pressure in the water pipe that a process that increases gradually be arranged, equally effectively prevent the variation in pressure of medium in the water pipe and back and forth fluctuation, guaranteed the normal operation of water pump, prolonged its working life.In addition, because the sealing block 11 on the spool has skeleton 12, the intensity of sealing piece 11 is increased greatly, prolong working life, reduced the replacing number of times.The two seals of sealed case, strengthened sealing effect, and since inner sealing device can effectively strike off the dirt that sticks on the valve rod, make with outer sealing device touch mutually the part valve rod become clean, thereby both can prolong working life of outer sealing device, be convenient to again change.Because fuel tank separates with valve body, has prevented the phenomenon that profit mixes mutually, after valve rod is divided into upper and lower two valve rods, when the sealing of maintenance fuel tank or sealed case 6, only need link 3 is opened, make the two separation, just can overhaul easily.When having prevented to overhaul, need the inconvenience that valve integral body is opened in the past.

In like manner, the technical solution according to the utility model provides can also provide a plurality of embodiments, and this all belongs to protection domain of the present utility model.

Claims

1. Buffer valve, it is made up of oil cylinder, piston, spool, valve rod, valve seat, sealed case etc., it is characterized in that, establishes the leading truck that is connected as a single entity with it at the afterbody of described spool, is provided with tank on the wall of this leading truck.

2. Buffer valve according to claim 1 is characterized in that, described tank is that upper opening is little, the tank that lower openings is big.

3. Buffer valve according to claim 2 is characterized in that, the tank on the described leading truck wall is the inverted cone tank, and is 4.

4. Buffer valve according to claim 1 and 2 is characterized in that, described valve rod is upper and lower two, and upper and lower valve rod is connected as a single entity it through a connection piece.

5. according to claim 2 or 3 described Buffer valves, it is characterized in that the inboard at described sealed case is provided with seal arrangement.

6. Buffer valve according to claim 4 is characterized in that, is equipped with seal arrangement in the interior outside of described sealed case.

7. according to right 1 or 2 described Buffer valves, it is characterized in that, in the sealing block of described spool, be provided with the skeleton that increases its intensity.

8. Buffer valve according to claim 6 is characterized in that, is provided with the skeleton that increases its intensity in the sealing block of described spool.