CN202484428U

CN202484428U - Valve leakage blocking device

Info

Publication number: CN202484428U
Application number: CN2012200509395U
Authority: CN
Inventors: 邹矢勋
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2012-02-17
Filing date: 2012-02-17
Publication date: 2012-10-10
Anticipated expiration: 2022-02-17

Abstract

The utility model discloses a valve leakage blocking device. The valve leakage blocking device comprises a compressing strip, a fastening belt, a sealing shell body and gland packing placed inside the sealing shell body. Two ends of the compassing strip are respectively provided with a bolt. The middle of the fastening belt goes around a valve body. Two ends of the fastening belt are respectively placed on the bolts and are respectively locked and positioned through nuts connected with threads of the bolts. A valve rod penetrates through the middle of the compressing strip, and a protruding portion surrounding the valve rod extends from the middle of the compressing strip. The sealing shell body is placed on a valve cover, the gland packing is placed on a screw extrusion part, and the protruding portion clings to the gland packing. The adoption of the valve leakage blocking device enables leakage to be eliminated rapidly and continuous production to be ensured.

Description

A kind of device for plugging valves

Technical field

The utility model relates to a kind of valve, particularly a kind of device for plugging valves that prevents with the valve leak of valve rod.

Background technique

Any pipe-line system all will be used valve, and the different medium different pressures all can use multi-form valve, so the valve kind is a lot; In the kind of numerous valves; Most valves all have valve rod, and like gate valve, stop valve, throttle valve, butterfly valve, ball valve, plunger valve, needle-valve, angle valve or the like, the valve that has a valve rod all has a common characteristic textural; Promptly in order to prevent that medium in the valve pocket is outside valve rod leaks into valve; In the junction of valve rod and valve body or valve gap a sealed letter is arranged all, the filler in the sealed letter is through compacted distortion, the lock ring valve rod; Make and combine closely between stuffing box packing and the valve rod so that do not have the slit, no matter guarantee that the medium valve rod can not leak along valve rod in the valve under static state or current intelligence.

Fig. 1 is the schematic representation of common valve; As shown in the figure; Said valve comprises valve body 1, valve gap 2, valve rod 4, screw thread extrusion 3 and sealed letter 5, and said valve gap 2 is fixed on the valve body 1, and said screw thread extrusion 3 is placed on the said valve rod 4 and with said valve gap 2 and is threaded; Said sealed letter 5 places in the said valve gap 2 and is positioned at the below of said screw thread extrusion 3, and said sealed letter 5 is placed on the said valve rod 4.Said screw thread extrusion 3 can push said sealed letter 5 seals the gap between 5 pairs of said valve rods 4 of sealed letter and the valve gap 2, prevents that the medium in the valve from leaking along valve rod 4.This is actual to be a kind of perfect condition; In reality; Medium leaks along valve rod 4 in the valve, and right and wrong usually see, because problems such as that any sealing material all has is aging, wearing and tearing, elasticity variation, these problems can cause in valve, occurring under the effect of pressure medium between valve rod 4 and the sealed letter 5 gap; In case this phenomenon occurs, leaking has just formed naturally.

Traditional solution is normally adjusted the screw thread extrusion 3 of sealed letter 5 tops, makes sealed letter 5 further compressed distortion, reaches the purpose of lock ring valve rod 4 once more.But this measure only to have compression surplus and elasticity still can sealing material take effect, have no effect for material aging, the elasticity variation, so unique best method of dealing with problems is changed valve or replacing sealed letter 5 exactly; This processing method is no doubt effective, but in the production run flow process, has a lot of valves often not isolate, and it is directly connected to the operation of whole system; That is to say; These valves can not arbitrarily be dismantled or switch, otherwise system can't normally move, even also security incident can take place; If medium is toxic or be corrosive or even flammable explosive gas in the valve, leaks and just mean that major safety risks are arranged.

The model utility content

For addressing the above problem, the utility model provides a kind of device for plugging valves, can not shut down the problem that solves valve leak.

For realizing above-mentioned purpose, the device for plugging valves of the utility model, said valve comprise valve body, valve gap, valve rod, sealed letter and screw thread extrusion; Said valve gap is fixed on the valve body, and said screw thread extrusion is placed on the said valve rod and with said valve gap and is threaded, and said sealed letter places in the said valve gap and is positioned at the below of said screw thread extrusion; Said sealed letter is placed on the said valve rod, and this device for plugging valves comprises compression bar, restraint zone, seal casinghousing and place the stuffing box packing in the seal casinghousing that the two ends of said compression bar are respectively arranged with bolt; Said valve body is walked around at the middle part of said restraint zone; Its two ends place respectively on the said bolt, and pin the location through the nut that is connected with said bolt thread respectively, and said valve rod is passed at the middle part of said compression bar; And extend a bump around said valve rod at the middle part; Said seal casinghousing places on the said valve gap, and said stuffing box packing places on the said screw thread extrusion, and said bump is close to said stuffing box packing.

The device for plugging valves of the utility model can both be used for the butterfly valve that analog structure is arranged, ball valve, plunger valve, gate valve etc.Adopt the device for plugging valves of the utility model, the valve rod in the on-line operation and the valve of sealed letter leakage are not shut down pressure sealing, stop a leak fast, that guarantees to produce carries out continuously.

Description of drawings

Fig. 1 is the schematic representation of common valve;

Fig. 2 is installed in the schematic representation on the valve among Fig. 1 for the device for plugging valves of the utility model;

Fig. 3 is that the A-A of Fig. 2 is to sectional view;

Fig. 4 is the worm's eye view of compression bar among Fig. 3;

Fig. 5 is the plan view of seal casinghousing among Fig. 3.

Embodiment

Referring to Fig. 2 and 3; The device for plugging valves of the utility model comprises compression bar 10, restraint zone 20, seal casinghousing 30 and places the stuffing box packing 31 in the seal casinghousing 30; The two ends of said compression bar 10 are respectively arranged with bolt 11,12, and said valve body 1 is walked around at the middle part of said restraint zone 20, and its two ends place respectively on the said bolt 11,12; And pin the location through the

nut

21,22 that is threaded with said bolt 11,12 respectively; Said valve rod 4 is passed at the middle part of said compression bar 10, and extends a bump 13 around said valve rod 4 at the middle part, and said seal casinghousing 30 places on the said valve gap 2; Said stuffing box packing 31 places on the said screw thread extrusion 3, and said bump 13 is close to said stuffing box packing 31.When regulating said

nut

21,22; Can make the said stuffing box packing 31 of bump 13 extruding of said compression bar 10; It is adjacent to screw thread extrusion 3 with said valve rod 4 respectively forms sealing, avoid the medium in the valve from the gap of screw thread extrusion 3 and valve rod 4, to leak.

The middle part of said compression bar 10 is provided with center hole, is used to pass valve rod 4, and two through holes can be offered in its two ends, is used to be provided with said bolt 11,12.The two ends of said restraint zone 20 can be offered through hole respectively, are used to penetrate said bolt 11,12, through the direction

swivel nut

21,22 to compression bar 10, just can give stuffing box packing 31 and apply bigger power, make its performance seal action.

Above-mentioned compression bar 10, restraint zone 20, seal casinghousing 30 should be the rigidity material, and have higher intensity, so that in stressed back difficult deformation or fracture.

Referring to Fig. 4 and Fig. 5, for making things convenient for compression bar 10 and the installation of seal casinghousing 30 on valve, said compression bar 10 and/or seal casinghousing 30 can be split type structures.Two-part of subdivision can adopt bolt or screw to connect.

Claims

1. device for plugging valves; Said valve comprises valve body (1), valve gap (2), valve rod (4), sealed letter (5) and screw thread extrusion (3), and said valve gap (2) is fixed on the valve body (1), and said screw thread extrusion (3) is placed in said valve rod (4) and upward and with said valve gap (2) is threaded; Said sealed letter (5) places in the said valve gap (2) and is positioned at the below of said screw thread extrusion (3); Said sealed letter (5) is placed on the said valve rod (4), it is characterized in that

This device for plugging valves comprises compression bar (10), restraint zone (20), seal casinghousing (30) and places the stuffing box packing (31) in the seal casinghousing (30); The two ends of said compression bar (10) are respectively arranged with bolt (11,12); (said valve body (1) is walked around at 20 middle part to said restraint zone; Its two ends place respectively on the said bolt (11,12), and pin the location through the nut (21,22) that is threaded with said bolt (11,12) respectively, and said valve rod (4) is passed at the middle part of said compression bar (10); And extend a bump around said valve rod (4) (13) at the middle part; Said seal casinghousing (30) places on the said valve gap (2), and said stuffing box packing (31) places on the said screw thread extrusion (3), and said bump (13) is close to said stuffing box packing (31).

2. device for plugging valves as claimed in claim 1 is characterized in that, said compression bar (10) and/or seal casinghousing (30) are split type structure.