CN203453528U - Ultralow-temperature top-assembling ball valve - Google Patents
Ultralow-temperature top-assembling ball valve Download PDFInfo
- Publication number
- CN203453528U CN203453528U CN201320575956.5U CN201320575956U CN203453528U CN 203453528 U CN203453528 U CN 203453528U CN 201320575956 U CN201320575956 U CN 201320575956U CN 203453528 U CN203453528 U CN 203453528U
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- valve
- ball
- valve seat
- valve body
- seat
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- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000012856 packing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000937378 Everettia interior Species 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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Abstract
The utility model discloses an ultralow-temperature top-assembling ball valve, which is used for solving the problems that the sealing property of the existing ultralow-temperature top-assembling ball valve is poor. The ultralow-temperature top-assembling ball valve comprises a valve body, a valve deck, a valve rod and an operating mechanism, wherein a valve ball and a valve seat are arranged in the valve body; the valve seat and the valve ball are matched with each other, and a sealing ring is arranged in the position, attached to the valve ball, of the valve seat; a sealed containing cavity is formed between the valve seat and the valve body; a compacting spring is arranged in the containing cavity; and one end of the compacting spring props against the valve seat and the other end props against the valve body. Due to the adoption of the seal manner of contact between the valve seat and the valve ball, and the sealing ring added on the valve seat, a duel-seal effect is provided to a product when being sealed in the ball valve; and meanwhile, the compacting spring is used for applying pre-tightening force on the valve ball to enable the valve seat seal surface to closely contact the valve ball in any case, and therefore the tightness of the product is further increased.
Description
Technical field
The utility model relates to a kind of ball valve, is specifically related to a kind of ultralow temperature upper-mounting type ball valve.
Background technique
Upper-mounting type ball valve is widely used on oil and natural gas pipeline, and in the device such as oil recovery, oil refining, petrochemical industry, chemical industry, chemical fibre, metallurgy, electric power, nuclear power, food and papermaking.Upper-mounting type ball valve is dismantled rapidly simple on pipeline, easy to maintenance quick.When valve breaks down need to repair time on pipeline, needn't dismantle valve from pipeline, need only dismantle flange bolt and nut are taken off valve gap together with valve rod group component from valve body, then take out spheroid and valve seat combination part.Can repair online spheroid and valve seat, this structural repair has been saved the time, and the loss in producing is dropped to minimum point.And the upper-mounting type ball valve of ultralow temperature is applicable to medium temperature-150 ℃ following valve, in Cryogenic valve, valve seal performance is one of important indicator of examination ultra-low temperature ball valve quality good or not, and sealability mainly comprises two aspects, i.e. interior sealability and external sealed performance.Interior sealability refers to the seal degree between valve seat and closure member, medium being reached, as the sealing between valve ball and valve seat; External sealed refers to the sealing at stem packing position and the sealing of bonnet flange part.Valve seat and the sealing between valve ball of existing product adopt single rigid seal, and in ultra-low temperature surroundings, different parts are subject to low temperature effect, all can produce certain distortion, thereby make the sealing of product unreliable.
Summary of the invention
For solving the problem of existing ultralow temperature upper-mounting type ball valve poor sealing performance in background technique, the utility model provides a kind of ultralow temperature upper-mounting type ball valve.
The technical solution of the utility model is: a kind of ultralow temperature upper-mounting type ball valve, comprise valve body, valve gap, valve rod and operating device, described valve gap is connected with valve body by bolt, in described valve body, be provided with valve ball and valve seat, described valve rod one end is connected with operating device, the other end is connected with valve ball through valve gap, suitable and the valve seat of described valve seat and valve ball is being provided with seal ring with the valve ball place of fitting, on described valve gap, be welded with draining board, between described valve rod and valve ball, be provided with anti-static device, between described valve seat and valve body, form airtight holding cavity, in described holding cavity, be provided with holddown spring, described holddown spring one end and valve seat offset, the other end and valve body offset.
As a kind of improvement of the present utility model, described valve body is provided with multi-stage stairs, and described valve seat is provided with the ladder suitable with valve body step, and the ladder of valve seat matches with the step of valve body and forms described holding cavity.
As further improvement of the utility model, in described holding cavity, be provided with dividing plate, described dividing plate is divided into the first cavity and the second cavity by holding cavity, in the second described cavity, is provided with seal ring.
As further improvement of the utility model, described seal ring is lip piston packing.
As further improvement of the utility model, described valve body and valve gap joint place are provided with shoulder block, and described shoulder block is provided with sealing gasket.
As further improvement of the utility model, described described operating device is worm gear operating device.
The beneficial effects of the utility model are, the sealing means that not only adopts valve seat to contact with valve ball, also on valve seat, increased seal ring, make product when interior sealing, there is the effect of double seal, the water droplet that is arranged so that operating device of draining board can not drop onto on valve body simultaneously, avoids valve body to be subject to water droplet temperature to affect the sealability of product.The effect of holddown spring is on valve ball, to apply pretightening force, make sealing surface of seat under any circumstance all with valve ball close contact, further increase the sealing of product.The utility model has also increased anti-static device and has made the Safety performance of this product better.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model embodiment's structural representation.
Accompanying drawing 2 is the structure enlarged view at I place in accompanying drawing 1.
Accompanying drawing 3 is the structure enlarged view at P place in accompanying drawing 1.
In figure, 1, valve body; 2, valve gap; 3, valve rod; 4, operating device; 5, bolt; 6, valve ball; 7, valve seat; 8, seal ring; 9, draining board; 10, anti-static device; 11, holding cavity; 12, holddown spring; 13, step; 14, ladder; 15, dividing plate; 16, the first cavity; 17, the second cavity; 18, seal ring; 19, shoulder block; 20, sealing gasket.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
By Fig. 1, in conjunction with shown in Fig. 2,3, a kind of ultralow temperature upper-mounting type ball valve, comprises valve body 1, valve gap 2, valve rod 3 and operating device 4, and described described operating device 4 is worm gear operating device.Described valve gap 2 is connected with valve body 1 by bolt 5, in described valve body 1, be provided with valve ball 6 and valve seat 7, described valve rod 3 one end are connected with operating device 4, the other end is connected with valve ball 6 through valve gap 2, suitable and valve seat 7 is provided with seal ring 8 with valve ball 6 places of fitting to described valve seat 7 with valve ball 6, conventionally valve seat adopts metallic material to make, and seal ring adopts the materials such as rubber to make, so the combination that the sealing of valve seat and valve ball is rigid seal and flexible sealing has guaranteed the performance of sealing in product.On described valve gap 2, be welded with draining board 9, between described valve rod 3 and valve ball 6, be provided with anti-static device 10, between described valve seat 7 and valve body 1, form airtight holding cavity 11, in described holding cavity 11, be provided with holddown spring 12, described holddown spring 12 one end and valve seat 7 offset, and the other end and valve body 1 offset.The beneficial effects of the utility model are, the sealing means that not only adopts valve seat to contact with valve ball, also on valve seat, increased seal ring, make product when interior sealing, there is the effect of double seal, the water droplet that is arranged so that operating device of draining board can not drop onto on valve body simultaneously, avoids valve body to be subject to water droplet temperature to affect the sealability of product.The effect of holddown spring is on valve ball, to apply pretightening force, make sealing surface of seat under any circumstance all with valve ball close contact, further increase the sealing of product.The utility model has also increased anti-static device, anti-static device makes the conducting all the time of valve ball and valve rod, and the conducting all the time of valve rod and valve gap and operating device, just can not produce potential difference, make product there is electrostatic-proof function, and then avoid the fire that causes because of static, greatly increased the Safety performance of this product.
Described valve body 1 is provided with multi-stage stairs 13, and described valve seat 7 is provided with the ladder 14 suitable with valve body 1 step 13, and the ladder 14 of valve seat 7 matches with the step 13 of valve body 1 and forms described holding cavity 11.Specifically, in described holding cavity 11, be provided with dividing plate 15, described dividing plate 15 is divided into the first cavity 16 and the second cavity 17 by holding cavity 11, in the second described cavity 17, is provided with seal ring 18.In particular, described seal ring 18 is lip piston packing.Being arranged so that of back side stepped shaft valve seat can good accommodating seal ring, in maintenance overhaul, finds, valve body and valve seat are prone to leakage, if the pretightening force of increase holddown spring certainly will increase the moment of closing of ball valve.In order not increase the moment of closing of ball valve, at the sealing surface of seat back side, increase seal ring, solved sealing surface of seat back side leakage problem, make the leakage prevention capability of product better, be optimal way of the present utility model.The spring that is arranged so that of dividing plate can finely act on pretightening force on valve seat very stably.
Described valve body 1 is provided with shoulder block 19 with valve gap 2 joint places, and described shoulder block 19 is provided with sealing gasket 20.The external sealed better effects if that such structure goes out valve gap.
Every technician's notice: although the utility model describes according to above-mentioned embodiment; but invention thought of the present utility model is not limited in this model utility; the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (6)
1. a ultralow temperature upper-mounting type ball valve, comprise valve body (1), valve gap (2), valve rod (3) and operating device (4), described valve gap (2) is connected with valve body (1) by bolt (5), in described valve body (1), be provided with valve ball (6) and valve seat (7), described valve rod (3) one end is connected with operating device (4), the other end is connected with valve ball (6) through valve gap (2), it is characterized in that: the suitable and valve seat (7) of described valve seat (7) and valve ball (6) is provided with seal ring (8) with valve ball (6) place of fitting, on described valve gap (2), be welded with draining board (9), between described valve rod (3) and valve ball (6), be provided with anti-static device (10), between described valve seat (7) and valve body (1), form airtight holding cavity (11), in described holding cavity (11), be provided with holddown spring (12), described holddown spring (12) one end and valve seat (7) offset, the other end and valve body (1) offset.
2. ultralow temperature upper-mounting type ball valve according to claim 1, it is characterized in that described valve body (1) is provided with multi-stage stairs (13), described valve seat (7) is provided with the ladder (14) suitable with valve body (1) step (13), and the ladder (14) of valve seat (7) matches with the step (13) of valve body (1) and forms described holding cavity (11).
3. ultralow temperature upper-mounting type ball valve according to claim 2, it is characterized in that being provided with dividing plate (15) in described holding cavity (11), described dividing plate (15) is divided into the first cavity (16) and the second cavity (17) by holding cavity (11), in described the second cavity (17), is provided with seal ring (18).
4. ultralow temperature upper-mounting type ball valve according to claim 3, is characterized in that described seal ring (18) is lip piston packing.
5. ultralow temperature upper-mounting type ball valve according to claim 1, is characterized in that described valve body (1) and valve gap (2) joint place are provided with shoulder block (19), and described shoulder block (19) is provided with sealing gasket (20).
6. ultralow temperature upper-mounting type ball valve according to claim 1, is characterized in that described described operating device (4) is worm gear operating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575956.5U CN203453528U (en) | 2013-09-17 | 2013-09-17 | Ultralow-temperature top-assembling ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575956.5U CN203453528U (en) | 2013-09-17 | 2013-09-17 | Ultralow-temperature top-assembling ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453528U true CN203453528U (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320575956.5U Expired - Lifetime CN203453528U (en) | 2013-09-17 | 2013-09-17 | Ultralow-temperature top-assembling ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020427A (en) * | 2015-06-26 | 2015-11-04 | 大连大高阀门股份有限公司 | Large-diameter top-mounted ultra-low temperature ball valve |
-
2013
- 2013-09-17 CN CN201320575956.5U patent/CN203453528U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020427A (en) * | 2015-06-26 | 2015-11-04 | 大连大高阀门股份有限公司 | Large-diameter top-mounted ultra-low temperature ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |