CN2806840Y - Gas isolating and sealing device for vertical pump - Google Patents
Gas isolating and sealing device for vertical pump Download PDFInfo
- Publication number
- CN2806840Y CN2806840Y CN 200520091258 CN200520091258U CN2806840Y CN 2806840 Y CN2806840 Y CN 2806840Y CN 200520091258 CN200520091258 CN 200520091258 CN 200520091258 U CN200520091258 U CN 200520091258U CN 2806840 Y CN2806840 Y CN 2806840Y
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- CN
- China
- Prior art keywords
- gas
- seal
- pump
- air chamber
- seal assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a gas isolating and sealing device for a vertical pump, which comprises a seal assembly. The utility model is characterized in that the seal assembly is composed of an upper and a lower dry gas mechanical seal assemblies, and the upper and the lower dry gas mechanical seal assemblies are respectively provided with a gas chamber, wherein an exhaust port of the gas chamber I below the upper seal assembly is communicated with a normally open exhaust valve and the gas chamber II below the lower seal assembly is communicated with a gas automatic discharge controller and a pump inlet. The utility model is characterized in that in the seal assemblies which is in vertical arrangement, high-pressure gas films are formed on seal end faces by externally supplied seal gas to carry out isolation to low-pressure media to realize shaft seal. The sealing device enables an ordinary vertical pump to completely reach the shaft seal effect of zero escape, and the use is safe.
Description
Technical field the utility model relates to a kind of seal arrangement, particularly a kind of device that utilizes the vertical pump running shaft of gas to carry out isolating seal.
The vertical blade pump of harmful chemical liquids such as that background technique is used to carry is inflammable, explosive, severe toxicity, in order to guarantee safe and reliable fed sheet of a media, prevent to leak, all the shaft sealing to pump proposes to be strict with, i.e. sealing should reach zero overflows, and this is that common mechanical seal is difficult to realize.Have only a kind of Under Water Pumps to propose to utilize gas to seal at present; it is by feed sealing gas in sealed case; the urgent seal protection that primary seal lost efficacy realizes by the rubber seal capsule, and this gas seal is not suitable for the vertical pump that uses under other conditions.
The summary of the invention the purpose of this utility model is to provide a kind of good sealing effect, can realize that shaft sealing zero is overflowed and sealing is reliable, adapts to the vertical pump gas barrier seal arrangement that uses under extreme temperature and pressure condition.
The purpose of this utility model is achieved in that a kind of vertical pump gas barrier seal arrangement, comprise black box, it is characterized in that black box is to be made of the upper and lower dry gas mechanical sealing assembly that is arranged on the pump shaft, the below of upper-lower seal assembly is respectively equipped with air chamber, wherein, the relief opening of the air chamber I of last black box below is connected with the outlet valve of often opening, and the air chamber II of lower seal assembly below is connected with automatic emission control device of gas and pump intake end.
Described air chamber II top is provided with relief opening, is connected in the automatic emission control device of gas by pipeline, and the bottom is provided with liquid port, is connected with the pump intake end.
The automatic emission control device of described gas is a gas-liquid separator, it is connected with the air chamber II of lower seal assembly below, the bottom of container is provided with the liquid port that advances that is connected with the entry end of pump, and top is communicated with automatic control outlet valve, is provided with liquid level monitoring device up and down in the container.
Described air chamber I top is provided with relief opening, is connected with the outlet valve of often opening by pipeline.
The seal arrangement that the utility model provides is a dry gas mechanical sealing assembly of establishing two upper and lower settings on pump shaft, wherein, the lower seal assembly is a primary seal, last black box is a backup seal, the upper-lower seal assembly adopts end face to drive the Double End dry gas mechanical seal of indent, and it is installed in the sealing case back-to-back, the sealed chamber in the black box is connected with air inlet pipeline and pressure measurement pipeline.Air chamber I between the upper-lower seal assembly, the air valve emptying that often begins to rehearse that the gas that black box leaks is communicated with by this air chamber with it.If primary seal (lower seal assembly) lost efficacy, last black box is born the effect of primary seal, at this moment, closes the outlet valve of often opening, and forms the air chamber I of sealing.Black box end blanket gas is to the leakage of air chamber II, be to realize the automatic gas volume of controlling in the air chamber by the automatic emission control device of gas, it is in the gas-liquid separator that gas in the air chamber II enters the automatic emission control device of gas by pipeline, the interior gas volume of container is constantly increased, liquid level descends gradually, when dropping to desired location, the automatic control outlet valve on container top is opened, and excessive gas is disposed to exhaust gas recovery system by outlet valve.When gas volume in the container was reduced to liquid level and reaches the position of liquid level monitoring device, outlet valve was closed automatically.
Characteristics of the present utility model are: form the high pressure air film by outer confession sealing gas on seal face in the black box of two upper and lower settings low piezodielectric is isolated, realize shaft sealing.And be effective shaft sealing that outlet valve guarantees pump by monitoring blanket gas pressure and automatic exhaust device; Adopt the sealing device can make common vertical pump reach the zero shaft sealing effect of overflowing fully, applied widely; The expense of utilizing gas to seal is low, and the means of keeping blanket gas pressure are simple and reliable, and the chemical compatibility of gas and medium is strong, and the temperature, the pressure range that are suitable for are wide; Black box end face when work is contactless, the long service life of parts; Under the situation of lower seal assembly total failure, still can realize sealing by last black box, Security and reliability are further improved.
Description of drawings Fig. 1 is a structural representation of the present utility model.
Embodiment is done further auspicious stating below in conjunction with accompanying drawing to the utility model:
As shown in Figure 1, be installed in the seal arrangement on the multistage vertical blade pump, it is enclosed within lower seal assembly 1 on the pump running shaft 8 and the sealing box body 2 of primary seal is fixedly connected on pump cover 3, and the air chamber II of lower seal assembly below is the space that is formed jointly by sealing box body 2, pump cover 3, orifice sleeve 4 or Equilibrator.The pump cover top is provided with baffle-box 5, the fixedly connected sealing box body 7 of going up black box 9 and backup seal on the buffering case lid 6, and the space in the baffle-box constitutes air chamber I.In the upper and lower sealing box body back-to-back mounting end wear the double mechanical seal parts of dynamic pressure groove, box body seals by lid 23,16, the sealed chamber that is formed by the double mechanical seal parts is connected with air inlet pipeline 10, pressure measurement pipeline 11.The relief opening 12 on baffle-box top is communicated with the outlet valve of often opening 13 by pipeline, and the gas that the upper-lower seal assembly leaks is discharged by relief opening, the outlet valve of baffle-box and air chamber I.When having only primary seal to lose efficacy, the exhaust valve closure of often opening, baffle-box is an enclosed space, black box plays primary seal on this moment, guarantees the reliable operation of pump.Air chamber II bottom is provided with the liquid port 14 that communicates with pump intake, and top is provided with relief opening 15, is connected with gas-liquid separator by pipeline.The lower seal assembly leaks to the blanket gas of media end, introduces gas-liquid separator by relief opening, the pipeline on air chamber II top and controls discharging automatically.The liquid port 18 that advances of container 17 bottoms of gas-liquid separator is connected with the inlet of pump, the top is communicated with automatic control outlet valve 20, be provided with liquid level monitoring device 21,22 up and down in the container, when liquid level reached liquid level monitoring device position, electrical-controller 19 can send signal at stop outlet valve 20; When if liquid level drops to the position of liquid level monitoring device, electrical-controller is opened the outlet valve exhausting air, and the variation by liquid level in the container realizes the automatic control to the outlet valve open and close, guarantees that the gas volume in the air chamber II is in the safety value of permission all the time.
Claims (4)
1, a kind of vertical pump gas barrier seal arrangement, comprise black box, it is characterized in that black box is to be made of the upper and lower dry gas mechanical sealing assembly that is arranged on the pump shaft, the below of upper-lower seal assembly is respectively equipped with air chamber, wherein, the relief opening of the air chamber I of last black box below is connected with the outlet valve of often opening, and the air chamber II of lower seal assembly below is connected with automatic emission control device of gas and pump intake end.
2, vertical pump gas barrier seal arrangement according to claim 1 is characterized in that described air chamber II top is provided with relief opening, is connected in the automatic emission control device of gas by pipeline, and the bottom is provided with liquid port, is connected with the pump intake end.
3, according to claim 1,2 described vertical pump gas barrier seal arrangements, it is characterized in that the automatic emission control device of described gas is a gas-liquid separator, it is connected with the air chamber II of lower seal assembly below, the bottom of container is provided with the liquid port that advances that is connected with the entry end of pump, top is communicated with automatic control outlet valve, is provided with liquid level monitoring device up and down in the container.
4, vertical pump gas barrier seal arrangement according to claim 1 is characterized in that described air chamber I top is provided with relief opening, is connected with the outlet valve of often opening by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520091258 CN2806840Y (en) | 2005-06-08 | 2005-06-08 | Gas isolating and sealing device for vertical pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520091258 CN2806840Y (en) | 2005-06-08 | 2005-06-08 | Gas isolating and sealing device for vertical pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2806840Y true CN2806840Y (en) | 2006-08-16 |
Family
ID=36921140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520091258 Expired - Fee Related CN2806840Y (en) | 2005-06-08 | 2005-06-08 | Gas isolating and sealing device for vertical pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2806840Y (en) |
-
2005
- 2005-06-08 CN CN 200520091258 patent/CN2806840Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Lin Qing Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20090708 |