CN204878801U - Engineering gate valve - Google Patents

Abstract

The utility model discloses an engineering gate valve, it includes valve body, valve gap, valve rod, hand wheel, flashboard, gland and sealing mechanism. Sealing mechanism includes holding ring, shop bolt and sealing filler. This sealing filler includes the filler and packs down, it all is located with lower filler to go up the filler in the clearance, the holding ring is located go up between filler and lower the filler. Be equipped with the constant head tank on this holding ring, the lateral wall of valve gap is equipped with the screw hole. The shop bolt is fixed threaded hole, the tip of this shop bolt inserts in the constant head tank. Going up the filler and being separated by the holding ring with lower filler, the position of holding ring is confirmed by the shop bolt. The pin after inserting the holding ring is locked the holding ring. Even the valve rod frequently rotates, can guarantee still that the position of packing with packing down is unchangeable, guaranteed the leakproofness.

Description

A kind of engineering gate valve

Technical field

The utility model relates to a kind of engineering gate valve, belongs to pipeline valve component.

Background technique

The sealing of valve is important parameter.201410671562.9 disclose a kind of gate valve, comprise handwheel, valve body, valve gap, spool, valve rod, filler, hold-down grid, bearing, the first annulus, the second annulus, the first seal ring, the second seal ring, flashboard.Described valve gap is fixed on described valve body, and described valve rod is through described valve gap and described hold-down grid, and described filler compresses by described hold-down grid, and described first annulus, described second annulus, described first seal ring are positioned at below described valve gap.Described spool is positioned at the lower end of valve rod, and shape is reverse frustoconic, and described flashboard is turbination, and described flashboard covers rubber layer outward, and described valve rod is connected with flashboard for T-slot connects.In order to improve sealing effect, the filler of different heights may not be identical, usually adopts below filler and top filler composition, as described in 201320687253.1,201420362964.6.In 201320687253.1, between filler, spacer element is set.Valve rod repeatedly rotates, and the position of spacer element may be caused to change, be necessary the position determining filler, to ensure sealing.

Model utility content

The utility model proposes a kind of engineering gate valve, secure the position of filler, ensure that the sealing after Long-Time Service.

The technical solution of the utility model is achieved in that

A kind of engineering gate valve, it is characterized in that, comprise valve body, valve gap, valve rod, handwheel, flashboard, gland and sealing mechanism, intake pipe is provided with in described valve body, outlet conduit and block chamber between this intake pipe and outlet conduit, described valve gap is fixed on described valve body, this valve gap is provided with driving hole, described valve rod penetrates rotatably described driving hole, there is between this valve rod and described driving hole a gap, the upper end of this valve rod is connected to described handwheel, the lower end of this valve body is connected to described flashboard, chamber is blocked described in this flashboard stretches into, described sealing mechanism comprises positioning ring, positioning dowel and stuffing box packing, sealing filler comprises filler and lower filler, described upper filler and lower filler are all positioned at described gap, described positioning ring is on described between filler and lower filler, this positioning ring is provided with locating slot, the sidewall of described valve gap is provided with tapped hole, described positioning dowel is fixed in described tapped hole, the end of this positioning dowel is inserted in described locating slot.

In engineering gate valve of the present utility model, described sealing mechanism also comprises upper sealing ring and lower sealing ring, described lower sealing ring is arranged on the below of described driving hole, described gap is inserted in the upper end portion of this lower sealing ring, described upper sealing ring is arranged on the top of described driving hole, described gap is inserted in the underpart of this upper sealing ring, and described gland is fixed on described valve gap, and this gland pushes down the upper end portion of described upper sealing ring.

In engineering gate valve of the present utility model, described valve body is also provided with separate cavities, blocks the top in chamber described in this separate cavities is positioned at.

In engineering gate valve of the present utility model, the end of described positioning dowel is arc.

In engineering gate valve of the present utility model, described valve body is connected by screw rod with valve gap.

In engineering gate valve of the present utility model, the outer ring of described handwheel is provided with multiple lug boss.

Implement this engineering gate valve of the present utility model, there is following beneficial effect: upper filler and lower filler are separated by positioning ring, and the position of positioning ring is determined by positioning dowel.Positioning ring is locked after inserting positioning ring by pin.Even if valve rod frequently rotates, still can ensure the invariant position of filler and lower filler, ensure that sealing.Separate cavities improves the distance in filler and media flow region, reduces filler institute influenced.Hand-held handwheel is convenient in the existence of lug boss, rotates convenient.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of this engineering gate valve of the present utility model;

Fig. 2 is the schematic diagram at the A place of Fig. 1;

Fig. 3 is the schematic diagram at the B place of Fig. 1;

Fig. 4 is place's schematic cross-section of the valve body of Fig. 1;

Fig. 5 is another place's schematic cross-section of the valve body of Fig. 1;

Fig. 6 is the schematic diagram of the flashboard of Fig. 1;

Fig. 7 is the schematic diagram of the other direction of Fig. 6;

Fig. 8 is the schematic diagram of the handwheel of Fig. 1.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described.

Of the present utility model this engineering gate valve as described in Fig. 1 to 8, comprises valve body 100, valve gap 200, valve rod 300, handwheel 400, flashboard 500 and gland 600.Be provided with intake pipe 110 in described valve body 100, outlet conduit 120, blocking chamber 130 and being positioned at this between this intake pipe 110 and outlet conduit 120 block depressed part 140 below chamber 130.Described valve gap 200 is fixed on described valve body 100, as Fig. 1, is connected by the flange of valve gap 200 with valve body 100 by screw rod.Preferably, described valve body 100 is also provided with separate cavities 150, blocks the top in chamber 130 described in this separate cavities 150 is positioned at.This separate cavities 150 has raised the height of flange, and separate cavities 150 improves the distance of sealed member and medium, reduces media flow to the impact of sealability.This valve gap 200 is provided with driving hole 210, and described valve rod 300 penetrates rotatably described driving hole 210.The upper end of this valve rod 300 is connected to described handwheel 400, and the lower end of this valve body 100 is connected to described flashboard 500, blocks chamber 130 described in this flashboard 500 stretches into, and described gland 600 is fixed on described valve gap 200 simultaneously.Described intake pipe 110 and outlet conduit 120 are equipped with seal ring 111, and described flashboard 500 contacts with sealing ring 111.Seal ring 111 directly contacts with flashboard 500, avoids the direct wearing and tearing to valve body 100.Rotating handwheel 400 can make flashboard 500 move up and down, and reaches the object of control media flowing.For ease of Non-follow control, the outer ring of described handwheel 400 is provided with multiple lug boss 410.

The end of described flashboard 500 is provided with elastic supporting member for supporting optical member 510, and this elastic supporting member for supporting optical member 510 stretches into described depressed part 140.When handwheel 400 inordinate rotation, elastic supporting member for supporting optical member 510 can play the effect of buffering, prevents valve body 100 damaged.The both sides of this flashboard 500 are provided with guiding groove 520, described in block chamber 130 sidewall be provided with guiding rib 131, described guiding rib 131 inserts described guiding groove 520.Flashboard 500 slides along guiding rib 131, can not offset due to the impact occurrence positions of medium.As Fig. 1, in the present embodiment, described gland 600 is provided with at least one attachment hole 610, and described valve gap 200 is provided with stud rotationally, and this stud passes from described attachment hole 610, and a nut is connected on this stud.This linkage structure can reduce the worm structure of side.Described gland 600 is provided with a stiffening ring 620, and stiffening ring 620 is connected by strengthening rib 630 with gland 600 main body.Be provided with a sleeve 640 in this stiffening ring 620, this sleeve 640 is coaxial with described driving hole 210.Preferably, this sleeve 640 is provided with the first worm structure, and valve rod 300 is provided with the second worm structure, and valve rod 300 is subject to the guiding of worm structure while rotating, and moves down.Valve rod 300 is connected to flashboard 500 rotationally, and flashboard 500 is movably located on and blocks chamber 130.Its ascending motion is passed to flashboard 500 by valve gap 200, realizes flashboard 500 blocking the opening and closing in chamber 130.

In the present embodiment, have a gap 310 between this valve rod 300 and described driving hole 210, the upper end in this gap 310 is gland 600, and centre arranges sealing mechanism 700.The sealing mechanism 700 of the present embodiment can improve sealing effect.Described sealing mechanism 700 comprises upper sealing ring 710, lower sealing ring 720 and stuffing box packing 730, described stuffing box packing 730 is positioned at described gap 310, described lower sealing ring 720 is arranged on the below of described driving hole 210, described gap 310 is inserted in the upper end portion of this lower sealing ring 720, described upper sealing ring 710 is arranged on the top of described driving hole 210, and described gap 310 is inserted in the underpart of this upper sealing ring 710.Upper-lower seal ring 720, from both sides compacting stuffing box packing 730, keeps the position of stuffing box packing 730.Described gland 600 is fixed on described valve gap 200, and this gland 600 pushes down the upper end portion of described upper sealing ring 710.The position of adjustment gland 600, can change the pressure of upper sealing ring 710 pairs of stuffing box packing 730.In addition, described gland 600 has a lead-in chamfered 650, and described upper sealing ring 710 has arc shaped surface 711, and described lead-in chamfered 650 is attached to the top of described arc shaped surface 711.Lead-in chamfered 650 can guide arc shaped surface 711, is conducive to upper sealing ring 710 and leads.Described valve rod 300 is provided with support platform 320, and this gate valve also comprises a supported spring 321, and the two ends of this supported spring 321 are connected on described support platform 320 and lower sealing ring 720.Supported spring 321 provides certain support force can to lower sealing ring 720, prevents lower sealing ring 720 from getting loose.When flashboard 500 is opened, medium enters valve gap 200 upper end, and support force increases, and meets the requirement now strengthening sealing effect.

Preferably, described sealing mechanism 700 also comprises positioning ring 740, positioning dowel 750, and stuffing box packing 730 is made up of upper filler 731 and lower filler 732.Described upper filler 731 and lower filler 732 are all positioned at the stuffing box packing 730 of 310, two kinds, described gap can adopt different materials, as described in 201320687253.1.Described positioning ring 740 on described between filler 731 and lower filler 732, the determining positions of positioning ring 740 relative position of two fillers.This positioning ring 740 is provided with locating slot 741, and the sidewall of described valve gap 200 is provided with tapped hole 220, and described positioning dowel 750 is fixed in described tapped hole 220, and the end of this positioning dowel 750 is inserted in described locating slot 741.Upper filler 731 is separated by positioning ring 740 with lower filler 732, and the position of positioning ring 740 is determined by positioning dowel 750.Positioning ring 740 is locked after inserting positioning ring 740 by pin.Even if valve rod 300 frequently rotates, still can ensure the invariant position of filler 731 and lower filler 732, ensure that sealing.The end of described positioning dowel 750 is arc, the shape of its size and locating slot 741 adapts, when positioning dowel 750 exists certain size deviation with positioning ring 740, under the guiding of the end face of arcuate structure, positioning dowel 750 still can effectively insert locating slot 741.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (6)

1. an engineering gate valve, it is characterized in that, comprise valve body, valve gap, valve rod, handwheel, flashboard, gland and sealing mechanism, intake pipe is provided with in described valve body, outlet conduit and block chamber between this intake pipe and outlet conduit, described valve gap is fixed on described valve body, this valve gap is provided with driving hole, described valve rod penetrates rotatably described driving hole, there is between this valve rod and described driving hole a gap, the upper end of this valve rod is connected to described handwheel, the lower end of this valve body is connected to described flashboard, chamber is blocked described in this flashboard stretches into, described sealing mechanism comprises positioning ring, positioning dowel and stuffing box packing, sealing filler comprises filler and lower filler, described upper filler and lower filler are all positioned at described gap, described positioning ring is on described between filler and lower filler, this positioning ring is provided with locating slot, the sidewall of described valve gap is provided with tapped hole, described positioning dowel is fixed in described tapped hole, the end of this positioning dowel is inserted in described locating slot.

2. engineering gate valve according to claim 1, it is characterized in that, described sealing mechanism also comprises upper sealing ring and lower sealing ring, described lower sealing ring is arranged on the below of described driving hole, described gap is inserted in the upper end portion of this lower sealing ring, and described upper sealing ring is arranged on the top of described driving hole, and described gap is inserted in the underpart of this upper sealing ring, described gland is fixed on described valve gap, and this gland pushes down the upper end portion of described upper sealing ring.

3. engineering gate valve according to claim 1, is characterized in that, described valve body is also provided with separate cavities, blocks the top in chamber described in this separate cavities is positioned at.

4. engineering gate valve according to claim 1, is characterized in that, the end of described positioning dowel is arc.

5. engineering gate valve according to claim 1, is characterized in that, described valve body is connected by screw rod with valve gap.

6. engineering gate valve according to claim 1, is characterized in that, the outer ring of described handwheel is provided with multiple lug boss.