CN207162106U - Accumulated water drainage device on the piston of dry gas holder - Google Patents

Abstract

The utility model discloses accumulated water drainage device on a kind of piston of dry gas holder, several heavy liquid holes are evenly equipped with piston arch low level plate circumference, a ponding, which is provided with, in single heavy liquid hole excludes mechanism, the ponding, which excludes mechanism, includes water-sealed component, lower section is cheated positioned at heavy liquid, its water inlet end is cheated bottom surface through heavy liquid and set can exclude piston low level plate top surface ponding as principle；Coal gas diffusion tube assembly, it is connected to the oral area of the water inlet end；Drain assembly, the water inlet end is connected in the side wall away from its oral area certain distance, in the first half that is horizontally disposed, and being located in heavy liquid hole, it is made up of the horizontal tube being connected with water inlet end side wall and the inlet valve set gradually outside the free end of the horizontal tube and water inlet blind plate；Moisturizing component, between the water inlet end of coal gas diffusion tube assembly or drain assembly and water-sealed component.The gas chamber that this accumulated water drainage device can solve to store moisture unsaturation coal gas excludes rainwater on piston automatically, moreover it is possible to carries out the band coal gas moisturizing operation to this accumulated water drainage device.

Description

Accumulated water drainage device on the piston of dry gas holder

Technical field

The utility model belongs to dry gas holder technical field, and in particular to ponding is arranged on a kind of piston of dry gas holder Except device.

Background technology

Dry gas holder, it is to belong to coal-gas recovering and a kind of energy-saving environmental protection device using field, due to its piston seal Device does not use water, thus the referred to as dry gas holder compared with wet type cabinet, dry gas holder have piston sealing device performance The advantages that safe and reliable, it is used widely in industries such as metallurgy, petrochemical industry, town gas.

In typhoon region, a large amount of rainwater (Zhanjiang gas chamber is brought into from gas chamber ventilating opening when typhoon passes through dry gas holder Total bag project typhoon by when cause to accumulate a large amount of water on gas chamber piston)；The glass sealing of dry gas holder cabinet top skylight Glue aging rainwater is fallen on piston plate；Because the Seal Oil needed for the piston sealing device of thin oil sealing-type dry-type gas chamber is from coal Gas holder upper side panel inwall flows down, due to cloth oil is uneven, inwall out-of-flatness, receive not big etc. enough reason of oiled-plate method cause to enter The part Seal Oil of piston oil ditch is splashed on piston plate, and above-mentioned various reasons may all cause uneven hydrops on piston plate to draw Piston mass imbalance is played, the gradient of piston operation is difficult to ensure that the security reliability of equipment longtime running cannot be guaranteed.

Because the cylinder in dry gas holder piston stroke region is sealing, cable is only under the ability of coal gas cabinet top top Onto piston, circuit is very long；It is time-consuming oversize if the cabinet cylinder bottom manhole that turns on the gas-fire uses pump discharge opeing temporarily, influence to produce； Particularly in the case where typhoon causes to accumulate a large amount of rainwater on piston by gas chamber, because rainwater mobility is strong, piston pole Easily tilt and cause operation troubles；Piston only has bottomed, opens cylinder bottom manhole and excludes the rainwater on piston with pump temporarily, to platform Wind resumes production rapidly totally unfavorable later.

The utility model people applied on January 18th, 2016《Hydrops remover on a kind of dry gas holder piston》, The patent No. 201620045481.2, it provides hydrops on the piston that a kind of gas chamber for being suitable for storage saturation coal gas uses Remover, can exclude the ponding on piston or the Seal Oil of splashing automatically, and the moisturizing of hydrops remover fluid-tight is full by collecting The condensed water separated out with coal gas is fed automatically, and hydrops is flowed on gas chamber bottom plate on the gas chamber piston of exclusion, through cabinet periphery Bottom plate drainage arrangement Auto-drainage import cabinet and separate oil sump, through oil interceptor by water-oil separating, the Seal Oil in oil interceptor is general Pumped back gas chamber is removed or removed with asphalt felt, and the ponding discharged on piston enters production waste pipe together with gas condensed water Net treatment for reuse or discharge.The situation that the patent stores the coal gas of water saturation to gas chamber is applicable, and moisture is stored in gas chamber In the case of undersaturated coal gas, the patent collects the disabler that gas condensed water is fluid-tight moisturizing automatically.

Utility model content

In view of this, the purpose of this utility model is to provide accumulated water drainage device on a kind of piston of dry gas holder, Rainwater on the piston that typhoon brings is excluded automatically to solve the gas chamber of storage moisture unsaturation coal gas, in the case of typhoon is ensured While gas chamber normal operation, the present apparatus is economized on resources as far as possible, mitigate adverse effect of the present apparatus to subsequent operation.Together When, moreover it is possible to carry out the band coal gas moisturizing operation to this accumulated water drainage device.

To reach above-mentioned purpose, the utility model is achieved through the following technical solutions：

The utility model provides accumulated water drainage device on a kind of piston of dry gas holder, is being in set by dry gas holder Several heavy liquid holes are evenly equipped with circular piston arch low level plate circumference, being provided with a ponding in single heavy liquid hole excludes mechanism, The ponding, which excludes mechanism, to be included：Water-sealed component, lower section is cheated positioned at heavy liquid, its water inlet end cheats bottom surface and with can through heavy liquid Piston arch low level plate top surface ponding is excluded to set for principle；Coal gas diffusion tube assembly, it is connected to the oral area of the water inlet end；Draining group Part, the water inlet end is connected in the side wall away from its oral area certain distance, in upper half that is horizontally disposed, and being located in heavy liquid hole Portion, by the horizontal tube being connected with water inlet end side wall and the inlet valve set gradually outside the free end of the horizontal tube and water inlet Blind plate forms；Moisturizing component, between the water inlet end of coal gas diffusion tube assembly or drain assembly and water-sealed component.

Further, in addition to water level checks component, is connected to the water inlet end in the side wall away from its oral area certain distance, is in It is horizontally disposed, and positioned at the lower half in the heavy liquid hole, by check valve, the inspection blind plate group being sequentially connected outside water inlet end side wall Into.

Further, the water-sealed component is made up of the oral siphon, trap, outlet pipe being sequentially connected, to form U-shaped water Envelope, the U-shaped water seal bottom are provided with pollution discharge mechanism, and the pollution discharge mechanism is using blind plate (12) of removing contamination.

Further, the coal gas diffusion tube assembly is included in the preceding blind plate set gradually outside into water port part, preceding pipeline, put Dissipate valve, rear blind plate and rear pipeline.

Further, the moisturizing component is when between coal gas diffusion tube assembly and the water inlet port part of oral siphon, by Moisturizing relays storehouse and formed with the sealing mechanism I that moisturizing relaying storehouse is connected by water supply valve I, the one of the moisturizing relaying storehouse End is connected with the preceding blind plate of coal gas diffusion tube assembly, and the other end is connected by water discharging valve I with water inlet port part；The sealer Structure I is moisturizing blind plate or the moisturizing groove I being connected by filling pipe I with water supply valve I；The moisturizing relaying storehouse and water supply valve I Between be additionally provided with the water compensating water-seal I of U-shaped.

Further, the moisturizing component is when between drain assembly and the water inlet end side wall of oral siphon, by being arranged on Water discharging valve II and sealing mechanism II on horizontal tube and between water inlet end side wall and inlet valve form；The sealer Structure II is made up of the water compensating water-seal II for the U-shaped being sequentially connected, water supply valve II, filling pipe II, moisturizing groove II, the water compensating water-seal II is connected between water discharging valve II and inlet valve in one end away from water supply valve II.

Further, the water inlet blind plate is replaced by screen pack during the draining of this accumulated water drainage device.

Further, the heavy liquid hole is close to piston box beam in the side side wall away from piston sagitta position plate and set.

The beneficial effects of the utility model are：The utility model continues with water-seal principle, there is provided a kind of typhoon is popular Accumulated water drainage device on the piston that the gas chamber of the storage moisture content unsaturation coal gas in area uses, the device provides U-shaped water seal The facility and water level inspection method of artificial recharge, ensure that the safety and reliability of the device；The device prevents from being splashed to work Seal Oil beyond the Great Wall is discharged with rainwater, plays saving Seal Oil, reduces the purpose of oil interceptor oil processing amount, have it is safe, The advantages of workable, simple for structure, easy to operate timely, it can be ensured that piston running quality balances.

Other advantages, target and feature of the present utility model will be explained in the following description to a certain extent State, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or Person can be instructed from practice of the present utility model.Target of the present utility model and other advantages can be said by following Bright book is realized and obtained.

Brief description of the drawings

In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing to this practicality It is new to be described in further detail, wherein：

Fig. 1 is dry gas holder elevation；

Fig. 2 is schematic diagram of this accumulated water drainage device embodiment one under the operating mode with coal gas artificial recharge (from gas chamber The elevation of accumulated water drainage device on piston is seen at center)；

Fig. 3 is Fig. 2 left view；

Fig. 4 is that this accumulated water drainage device applies example two in gas chamber storage coal gas and do not arrange the schematic diagram under rainwater operating mode；

Fig. 5 applies the Seal Oil after gas chamber stores coal gas and automatic drained rainwater of example two for this accumulated water drainage device and flowed into simultaneously Full of oral siphon in trap still or water is not so as to arranging schematic diagram under Seal Oil operating mode；

Fig. 6 is schematic diagram of this accumulated water drainage device embodiment three under the operating mode with coal gas artificial recharge；

Fig. 7 is schematic diagram of this accumulated water drainage device example IV under the operating mode with coal gas artificial recharge；

Reference：Dry gas holder 1, heavy liquid hole 2, horizontal tube 3, inlet valve 4, water inlet blind plate 5, screen pack 6, inspection Valve 7, check blind plate 8, oral siphon 9, trap 10, outlet pipe 11, blind plate 12 of removing contamination, preceding blind plate 13, preceding pipeline 14, diffuse Valve 15, rear blind plate 16, rear pipeline 17, moisturizing relaying storehouse 18, water supply valve I 19, water discharging valve I 20, moisturizing blind plate 21, moisturizing Pipe I 22, moisturizing groove I 23, water compensating water-seal I 24, water discharging valve II 25, water compensating water-seal II 26, water supply valve II 27, filling pipe II 28th, moisturizing groove II 29；Wherein：Bottom plate 1-1, piston box beam 1-2, piston arch low level plate 1-3, piston sagitta position plate 1-4；

Other code name implications in accompanying drawing：A:Air；G：Coal gas；H1：The vertical maximum water seal height of present apparatus trap；H2： The vertical maximum stage height of side wall water inlet of present apparatus water inlet pipe；H2’：The present apparatus trap be all water and oral siphon almost Water inlet pipe level height needed for oil extraction is all under oily operating mode；H3：Water level checks the effective SEA LEVEL VARIATION height of component；H4：Tear open Except the minimum measurement height of manual measurement water level after coal gas diffusion tube assembly；H5：The effective height of water level of water compensating water-seal { exceedes [coal Gas holder pressure (mm water columns)+500mm] }.

Embodiment

Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail；It is it should be appreciated that it is preferred that real Example is applied only for illustrating the utility model, rather than in order to limit the scope of protection of the utility model.

It is coal gas below piston as shown in figure 1, more than the piston of dry gas holder 1 in the utility model being air zone A Area G；Including bottom plate 1-1 and piston, wherein piston is mainly made up of piston box beam 1-2 and piston arch, piston arch mainly by The piston arch low level plate 1-3 being supported and fixed on piston box beam 1-2 and the piston sagitta being connected with piston arch low level plate 1-3 Position plate 1-4 compositions.As Figure 2-3, on the utility model piston plate accumulated water drainage device by substantially uniform some on piston Individual ponding excludes mechanism composition, if that is, set by dry gas holder 1 in being evenly equipped with circular piston arch low level plate 1-3 circumferences Dry heavy liquid hole 2, adjacent heavy liquid hole the distance between 2 is roughly equal, and ponding row is respectively provided with corresponding single heavy liquid hole 2 Except mechanism, the ponding on piston is excluded in the hope of automatic uniform and prevents Seal Oil from excluding.The ponding excludes mechanism and utilizes water seal Principle excludes the ponding on piston, and its particular number can determine according to the size of piston, below, the utility model style of writing In with single ponding exclude mechanism 26S Proteasome Structure and Function be described.

The utility model is close to piston box beam 1-2 piston arch in the side side wall away from piston sagitta position plate 1-4 The heavy liquid hole 2 that a ponding excludes mechanism is provided with low level plate 1-3, described ponding, which excludes mechanism, includes water-sealed component, position In heavy liquid hole 2 lower section, its water inlet end through heavy liquid cheat 2 bottom surfaces and using can exclude piston encircle low level plate 1-3 top surfaces ponding as Principle is set, and forms U-shaped water seal by the oral siphon 9, trap 10, outlet pipe 11 that are sequentially connected, U-shaped water seal bottom is provided with blowdown Mechanism, for the pollution discharge mechanism using removing contamination blind plate 12, the free end of the oral siphon 9 is described water inlet end, its side wall be provided with into The mouth of a river (unmarked)；Coal gas diffusion tube assembly, the oral area of the water inlet end is connected to, it is blind before being set gradually outside water inlet port part Plate 13, preceding pipeline 14, diffuse valve 15, rear blind plate 16 and rear pipeline 17；Drain assembly, the water inlet end is connected to away from its oral area In the side wall of certain distance, in the first half that is horizontally disposed, and being located in heavy liquid hole 2, by with entering water in water inlet end side wall The horizontal tube 3 of mouth connection and the inlet valve 4 set gradually outside the free end of the horizontal tube 3 and water inlet blind plate 5 form, i.e., Water inlet blind plate 5, inlet valve 4 and the horizontal tube 3 for being slightly below piston arch low level plate 1-3 are set in heavy liquid hole 2, so as to arrange Rainwater to the greatest extent on piston, and in order to when this accumulated water drainage device breaks down can safety cut-off coal gas, using on piston The safety cut-off pattern of the inlet valve 4+ water inlet blind plates 5 of the drain assembly of accumulated water drainage device, while the horizontal peace of inlet valve 4 Fill and use flange to connect, gas leak can be prevented in the case of the water-sealed component failure of the U-shaped of accumulated water drainage device；Mend Water assembly, it can be located between coal gas diffusion tube assembly and the water inlet end of water-sealed component, drain assembly and water seal can also be located at Between the water inlet end of component；Water level checks component, the water inlet end is connected in the side wall away from its oral area certain distance, in level Set, and positioned at the lower half in heavy liquid hole 2, by be sequentially connected outside water inlet end side wall check valve 7, check 8 groups of blind plate Into.The utility model is on the basis of existing coal gas industry water seal, and water seal water inlet is added blind using valve on piston plate Plate connection, moisturizing component and water level check structure that component is combined etc., reach and adapt to the mesh that gas chamber stores unsaturated coal gas , the ponding on piston can in time, be easily and safely excluded, ensures that gas chamber normally produces when typhoon passes through；Can also be automatic Prevent to arrange outside Seal Oil, save Seal Oil, reduce oil interceptor Seal Oil treating capacity.

With reference to shown in Fig. 4,5, in order to prevent the water-sealed component of this accumulated water drainage device from causing water level height because of reasons such as evaporations Water seal failure causes it can not be in use, this accumulated water drainage device carries out band by the way that there is provided moisturizing component after degree H1 is changed into 0 Coal gas artificial recharge ensures.For being accumulated due to reasons such as splashings to a small amount of Seal Oil on piston low level plate 1-3, rationally set This accumulated water drainage device water inlet pipe water inlet maximum stage height H2 of fixed specific gas chamber, when ponding is drained on piston, long-pending oil Being flowed into by water inlet makes in H2 altitude ranges water inlet pipe entirely full of oil, and this accumulated water drainage device outlet pipe maximum water seal height When water is all in the range of H1, because gas chamber with the ratio of Seal Oil weighs about 0.88 or so, now water inlet pipe water level maximum height H2 It is changed into oil level maximum height H2 ', Seal Oil ponding is only possible to discharge this accumulated water drainage device.Design makes water inlet pipe oil level maximum high H2 ' is spent higher than the height of inlet valve 4, then a small amount of Seal Oil that can prevent from accumulating on piston is discharged to coal from this accumulated water drainage device On gas holder bottom plate 1-1, reach recovery Seal Oil, reduce oil interceptor trapped fuel treating capacity, prevent Seal Oil from entering production waste water pipe network Purpose.From the point of view of practical experience, the Seal Oil accumulated on piston is typically few, and gas chamber piston mass balance will not be produced Life significantly affects, and typhoon manually reclaims long-pending oil to being located at the piston oil ditch on piston box beam 1-2 peripheries i.e. from heavy liquid hole 2 later Can.Meanwhile water level checks that component can check whether this accumulated water drainage device water inlet pipe height of water level is enough, so as to infer this product Water remover outlet pipe water seal height H1 is enough, and the water-sealed component of this accumulated water drainage device is safe.Water level checks component The method for setting liquid level to show mirror can be used, but mirror structure is complicated and required installation dimension is larger, observation is inconvenient, sinks liquid Cheat that 2 sizes are larger, the coal gas diffusion that not only big but also deep hole is unfavorable for leakage is set in the region that may reveal coal gas.This patent pushes away Recommend water level and check that component checks the structure of blind plate 8 using check valve 7+, remove and open the water outlet of check valve 7 after checking blind plate 8, It is safe for may determine that this accumulated water drainage device water-sealed component, is keeping checking component above height of water level H3 ＞ 0 from water level In the case of, it may be determined that the band air artificial recharge cycle of the water-sealed component of this accumulated water drainage device, i.e., summarize statistics from Water level checks that the component above height of water level H3 time cycle of 7 row's not water outlets and considers certain abundant from design load to check valve Degree, it may be determined that in the band air artificial recharge cycle of the specific gas chamber present apparatus, contain specific water to adapt to specific gas chamber storage Divide the moisturizing frequency of the coal gas of degree of unsaturation.In addition, in the case where water level checks component not water outlet, operating personnel should take with oneself With portable CO detectors and the coal gas safeguards such as air respiratorresuscitator are worn, should be by band in the case where confirming water seal failure The method of coal gas artificial recharge implements moisturizing operation to this accumulated water drainage device.

Further, since this accumulated water drainage device checks that component infers present apparatus outlet pipe water seal height H1 foots by water level It is enough, therefore the connectedness of holding water-sealed component is precondition.To prevent water-sealed component connects blockage from causing failure, excluding On piston during ponding, water inlet blind plate 5 can be replaced by screen pack 6, to prevent the foreign matter of larger particles from being made into water-sealed component bottom Into blocking；Blind plate 12 of removing contamination is set in water-sealed component bottom simultaneously, is easy to personnel to be removed contamination when entering inspection under piston anti-blocking.

Embodiment one：(as shown in Figure 2,3)

The moisturizing component relays storehouse when between coal gas diffusion tube assembly and the water inlet port part of oral siphon by moisturizing 18 and formed with the sealing mechanism I that be connected by water supply valve I 19 of moisturizing relaying storehouse, the moisturizing relays one end and the coal in storehouse 18 The preceding blind plate 13 that gas diffuses tube assembly is connected, and the other end is connected by water discharging valve I 20 with water inlet port part；The sealing mechanism The I moisturizing groove I 23 to be connected by filling pipe I 22 with water supply valve I；When the water-sealed component of this accumulated water drainage device is because of evaporation etc. Reason cause water seal height H1 be changed into 0 after water seal fail, so as to cause this accumulated water drainage device can not be in use, can be to this product Water remover carries out band coal gas moisturizing operation.The band coal gas moisturizing operation procedure is as follows：Closure state is in inlet valve 4 Under, valve 15, water supply valve I 19, water discharging valve I 20 are diffused in closing, and then, after being full of water in moisturizing groove I 23, unlatching is diffused Valve guides coal gas with pressure into eminence pressure release (being advantageous to prevent personnel's gas poisoning), and then, opening water supply valve I 19 makes benefit Water relaying is full of water in storehouse 18；After closing water supply valve I 19 successively again and diffusing valve 15, water discharging valve I 20 is opened to water seal Component moisturizing；Finally, so operate repeatedly several times, repeating such steps are until allow the water seal height H1 of the water-sealed component to meet After requirement, and find there are flowing out by opening check valve 7, you can the band coal gas for completing the accumulated water drainage device is mended Water, and present apparatus row's ponding function can be recovered.In addition, in the regular maintenance of this accumulated water drainage device, once find water level inspection Component stream not water outlet is looked into, portable carbon monoxide detector can be now carried and wear air respiratorresuscitator, opening diffuses valve 15, will be artificial Moisturizing groove I 23 in be full of water after, slowly open water supply valve I 19, treat moisturizing relaying storehouse 18 in be full of water, i.e. moisturizing groove I 23 When interior water level does not decline substantially, water discharging valve I 20 is slowly opened to the water filling of this accumulated water drainage device, if now overflowed without CO, Illustrate that water seal is still effective, can continue to carry out artificial recharge operation by this program；If it find that portable CO detectors report It is alert, then water supply valve I 19, water discharging valve I 20 should be closed rapidly and diffuses valve 15, mended by band coal gas moisturizing operation procedure Water.Moisturizing groove I 23 and the moisture storage capacity in moisturizing relaying storehouse 18 are all that can calculate acquisition, so as to go out can't see present apparatus discharge outlet Judge whether present apparatus water inlet pipe water level maximum height H2 has reached by added rate of water make-up in the case of water overflow, can open Water level checks that the check valve 7 of component is confirmed.

Embodiment two：(as shown in Figure 4,5)

The present embodiment is with the difference of embodiment one：The sealing mechanism I is moisturizing blind plate 21.Fig. 4 is the present apparatus Stored in gas chamber and coal gas and do not arrange the configuration diagram under rainwater operating mode, rear blind plate 16 is only now set with diffusing tube assembly, no Including rear pipeline 17；Moisturizing groove I 23 and filling pipe I 22 are replaced with moisturizing blind plate 21 simultaneously, the valve of all present apparatus all closes Close, to realize present apparatus safety cut-off.Fig. 5 is that present apparatus Seal Oil after gas chamber stores coal gas and automatic drained rainwater flows into And, confirm before arranging rainwater full of oral siphon 9 and in trap 10 still or water is not so as to arrange schematic diagram under Seal Oil operating mode In the case of present apparatus water seal height is effective, removes the diffusing facility after diffusing valve 15 and open this and diffuse valve 15, remove Rainwater is intake blind plate 5, is opened rainwater inlet valve 4 and is simultaneously installed the screen pack 6 of rainwater entrance, and every other valve is closed, can be with Typhoon is excluded in time passes through the rainwater that gas chamber is taken on piston.

Embodiment three：(as shown in Figure 6)

The present embodiment is with the difference of embodiment one：Also set between the moisturizing relaying storehouse 18 and water supply valve I 19 It is equipped with the water compensating water-seal I 24 of U shapes.It can prevent coal gas from being overflowed from the artificial direction of moisturizing groove I 23.

Example IV：(as shown in Figure 7)

The present embodiment part unlike the embodiments above is：The moisturizing component is positioned at drain assembly and oral siphon When between the water inlet of water inlet end side wall, by be arranged on horizontal tube 3 and positioned at water inlet end side wall water inlet and inlet valve 4 it Between water discharging valve II 25 and sealing mechanism II form；The sealing mechanism II by the U-shaped that is sequentially connected water compensating water-seal II 26, mend Penstock II 27, filling pipe II 28, moisturizing groove II 29 form, and the water compensating water-seal II 26 is in one end away from water supply valve II 27 It is connected between water discharging valve II 25 and inlet valve 4.Moisturizing relaying storehouse 18, increase water discharging valve II 25 can now be cancelled and taken Disappear water discharging valve I 20, and valve 15 is diffused in reservation, equally achievable present apparatus row's rainwater and moisturizing safely.In this case, pass through The switch controls of water supply valve II 27 fill into the water of the present apparatus；Water discharging valve II 25 is opened when arranging rainwater and diffuses valve 15, while the present apparatus is not arranged blind plate 16 after the rear pipeline 17 after diffusing valve 15 should be equally removed under rain event and is added and blocked.

Finally illustrate, above example is only unrestricted to illustrate the technical solution of the utility model, although ginseng The utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this The technical scheme of utility model is modified or equivalent substitution, and without departing from the objective and scope of the technical program, it all should Cover among right of the present utility model.

Claims (8)

1. A kind of 1. accumulated water drainage device on piston of dry gas holder, it is characterised in that set by dry gas holder (1) in circle Several heavy liquid holes (2) are evenly equipped with annular piston arch low level plate (1-3) circumference, being provided with a ponding in single heavy liquid hole excludes Mechanism, the ponding, which excludes mechanism, to be included：

   Water-sealed component, lower section is cheated positioned at heavy liquid, its water inlet end cheats bottom surface and can exclude piston arch low level plate through heavy liquid Top surface ponding is set for principle；

   Coal gas diffusion tube assembly, it is connected to the oral area of the water inlet end；

   Drain assembly, the water inlet end is connected in the side wall away from its oral area certain distance, in horizontally disposed, and positioned at the heavy liquid The first half in hole, what is set gradually by the horizontal tube (3) being connected with water inlet end side wall and outside the free end of the horizontal tube enters Penstock (4) and water inlet blind plate (5) composition；

   Moisturizing component, between the water inlet end of coal gas diffusion tube assembly or drain assembly and water-sealed component.
2. 2. accumulated water drainage device on the piston of dry gas holder according to claim 1, it is characterised in that also include：

   Water level checks component, is connected to the water inlet end in the side wall away from its oral area certain distance, in horizontally disposed, and positioned at should The lower half in heavy liquid hole, by be sequentially connected outside water inlet end side wall check valve (7), check that blind plate (8) forms.
3. 3. accumulated water drainage device on the piston of dry gas holder according to claim 2, it is characterised in that the water seal group Part is made up of the oral siphon (9), trap (10), outlet pipe (11) being sequentially connected, to form U-shaped water seal, the U-shaped water seal bottom Provided with pollution discharge mechanism, the pollution discharge mechanism is using blind plate (12) of removing contamination.
4. 4. accumulated water drainage device on the piston of dry gas holder according to claim 3, it is characterised in that the coal gas is put Separate tube component is included in the preceding blind plate (13) set gradually outside into water port part, preceding pipeline (14), diffuses valve (15), rear blind plate And rear pipeline (17) (16).
5. 5. accumulated water drainage device on the piston of dry gas holder according to claim 4, it is characterised in that the moisturizing group Part when between coal gas diffusion tube assembly and the water inlet port part of oral siphon, by moisturizing relaying storehouse (18) and with the moisturizing Formed after the sealing mechanism I that storehouse is connected by water supply valve I (19), the one end in the moisturizing relaying storehouse and coal gas diffusion tube assembly Preceding blind plate connection, the other end by water discharging valve I (20) with intake port part be connected；The sealing mechanism I is moisturizing blind plate (21) the moisturizing groove I (23) or by filling pipe I (22) being connected with water supply valve I；Moisturizing relaying storehouse and water supply valve I it Between be additionally provided with the water compensating water-seal I (24) of U-shaped.
6. 6. accumulated water drainage device on the piston of dry gas holder according to claim 4, it is characterised in that the moisturizing group Part when between drain assembly and the water inlet end side wall of oral siphon, by be arranged on horizontal tube and positioned at water inlet end side wall with Water discharging valve II (25) and sealing mechanism II between inlet valve form；The sealing mechanism II is by the U-shaped that is sequentially connected Water compensating water-seal II (26), water supply valve II (27), filling pipe II (28), moisturizing groove II (29) composition, the water compensating water-seal II exist One end away from water supply valve II is connected between water discharging valve II and inlet valve.
7. 7. accumulated water drainage device on the piston of dry gas holder according to claim 1, it is characterised in that arranged in this ponding The water inlet blind plate is replaced by screen pack (6) when arranging ponding except device.
8. 8. accumulated water drainage device on the piston of dry gas holder according to claim 1, it is characterised in that the heavy liquid hole It is close to piston box beam in the side side wall away from piston sagitta position plate to set.