CN2775348Y

CN2775348Y - Breathing type petrochemical flow pump

Info

Publication number: CN2775348Y
Application number: CN 200520004786
Authority: CN
Inventors: 姚亮; 陈明翔
Original assignee: SIFANG JIATE FLUID EQUIPMENT CO Ltd DALIAN
Current assignee: SIFANG JIATE FLUID EQUIPMENT CO Ltd DALIAN
Priority date: 2005-02-18
Filing date: 2005-02-18
Publication date: 2006-04-26
Anticipated expiration: 2015-02-18

Abstract

The utility model relates to a breath type petrochemical flow pump in the fields of petrochemical industry and natural gas transportation, which is used for transporting media which have high temperature, high pressure, easy combustion, easy explosion, easy coagulation and strong corrosion. The utility model is characterized in that an inlet of the pump is provided with an induction chamber which is composed of a suction pipe, a cylinder cavity, a floating ball, a floating ball rod and a liquid level switch; an outlet of the pump is provided with an air sealing chamber with a one-way valve body; a connecting rod in a bearing box is provided with a breath chamber which is composed of an upper casing body, a lower casing body, a corrugated sealing film, an upper breath body, a lower breath body, a left valve core, a middle valve core, a right valve core, a connecting rod and a powder shaft sleeve; a pipe passage between the induction chamber and the breath chamber is provided with an electric control valve; the bearing box is provided with a synchronizing mechanism inside, and the synchronizing mechanism is composed of a transmission shaft, a connecting rod, an eccentric wheel, an outer gear, an inner gear and a clutching handle; a pump body is provided with a sealing chamber which is composed of a pump cover; the pump body and the bearing box are connected by a middle connecting section. The utility model can be started without previous pump priming and has the advantages of better seal, safe use and reduced environment pollution.

Description

The respiration type petrochemical process pump

Technical field

The utility model relates to oil, chemical industry, Gas Industry centrifugal pump, especially be applicable to carry high temperature, high pressure, inflammable, explosive, easy crystallization, easily solidify, a kind of respiration type petrochemical process pump of strong corrosive media.

Background technique

At present, the API610 standard of API promulgation is the standard that world's pump industry has significantly affecting power most.The API610 standard has been established its unique status in world's pump industry with its science, rigorous, high-level requirement.API is every spends the regular hour, just can revise its standard of formulating.The API610 standard is no exception, and in the mid-90 in 20th century, API has been issued API610 the 8th edition " petroleum industry, heavy chemical industry and gas industrial centrifugal pump " standard for solving existing problem in the present standard.API610 the 8th edition has stricter requirement at the aspects such as stability, reliability, operating characteristics and working life of pump, is mainly reflected in: all many-sides such as sealing, material, vibration, bearing, rotor dynamics, auxiliary system.Obtained using more widely in industries such as international petroleum refinery, chemical industry, rock gases at present.What the use at present of the pump industry of China was many still is according to API610 sixth version, the 7th edition centrifugal pump that standard manufactures and designs.Because oil; chemical industry; the develop rapidly of industries such as rock gas; and the requirements at the higher level of environmental protection; according to the API sixth version; the 7th edition centrifugal pump that standard designs and manufactures; there has been narrow limitation clearly in the use; as carrying high temperature; high pressure; inflammable; explosive; easily crystallization; easily solidify; on the important station such as strong corrosive media; the pump shaft fracture usually appears; the bearing bracket stand fracture; seal leakage; bearing life is short; phenomenons such as befouling environment; and traditional pump needs multi-form sealing; to join different types of pump cover; its design is very unreasonable, so according to the API610 sixth version; the 7th edition centrifugal pump that standard manufactures and designs should belong to modern obsolete product.Though China had some pump enterprises to produce the product that some meet the API standard since 2000, also can only be confined to production plain edition centrifugal pump.These centrifugal pumps, when pump is worked under positive pressure, just can't use drawdown to the state below the intake pipe, and for those pumps of under condition of negative pressure, working, also can only adopt the scheme that adds vacuum pump, but this has occurred again that number of devices is many, floor space big, pipeline connect many, leakage rate big, pump degree of vacuum inadequately, the suction head etc. that influences pump is many unfavorable.If adopt the scheme that adds self-priming pump, also do not have the API modular product on the market at present.

Summary of the invention

The utility model is intended to existing defective and deficiency in the above-mentioned technology, and unique breathing composite structure and big cavity pump cover be provided, need not pour water and be provided with bottom valve in advance, not only meet a kind of respiration type petrochemical process pump of API standard but also good airproof performance.

The purpose of the utility model pump, realize with following technological scheme: comprise the pump housing, impeller, pump cover, pump shaft, be characterised in that: its structure is mainly by the pump housing of accompanying the temperature layer, the closed chamber of the big cavity pump cover of companion's temperature layer, bearing housing, middle linkage section, connecting rod synchronous interface mechanism, inhale the respiratory chamber of vacuum, the induction chamber of companion's temperature layer, the envelope air chamber of companion's temperature layer, electric control valve is formed, the pump housing of companion's temperature layer, one end of pump shaft is in the pump housing, adorn preoral loop on its shaft part, impeller, back choma, the closed chamber of big cavity pump cover, the other end of pump shaft is bearing in the end with bearing to be had in the bearing housing of cooling chamber, middle linkage section with corrosion protection material system between the pump housing and bearing housing is connected, dress and the synchronous connecting rod synchronous interface mechanism that rotates of pump shaft on the pump shaft in the bearing housing, connecting rod synchronous interface mechanism connects the respiratory chamber of the suction vacuum of being made up of one-way valve and ripple sealing film, induction chamber at the dress companion of pump intake place temperature layer, at the envelope air chamber of pump housing outlet port dress companion temperature layer, on the connecting pipeline between induction chamber and the respiratory chamber, electric control valve is installed.Described closed chamber is made up of big cavity pump cover, axle sleeve, seal, the sealing cover of companion's temperature layer, adorns axle sleeve on the pump shaft section of impeller, adorns the big cavity pump cover of companion's temperature layer outside axle sleeve, adorns seal, sealing cover between the big cavity pump cover of axle sleeve and companion's temperature layer.Described connecting rod synchronous interface mechanism is made up of pump shaft, bearing, bearing housing, eccentric wheel external gear, slip internal gear, bearing, crank, connecting rod, clutch handle, dress eccentric wheel external gear on the pump shaft in bearing housing, slip internal gear with the engagement of eccentric wheel external gear, insert bearing on the eccentric wheel external diameter of external gear, the bearing outer ring cover cranks, crank and connecting rod hinge joint, the slip internal gear connects clutch handle; Before the pump startup, the moving coupling of dish is also pulled and clutch handle that the internal gear that slides links, makes inside and outside gear engagement, primer pump then, and during the pump shaft rotation, the crank drivening rod is reciprocating, and connecting rod drives respiratory chamber work; After the pump proper functioning, to pull clutch handle external gear and internal gear are separated, connecting rod stops action, and respiratory chamber also quits work at this point; Avoid like this at pump from the whole process that starts to shutdown, respiratory chamber is in running order always, thereby avoids unnecessary consumption power and lazy-tongs to influence the normal operation of pump and the noise of generation.The respiratory chamber that described one-way valve and ripple sealing film are formed, it is made up of upper and lower casing, middle spool, ripple sealing film, upper and lower breathing body, left and right spool, connecting rod, powder metallurgy axle sleeve, in the body cavity of upper and lower casing combination, establish valve port in the upper shell, there is middle spool the valve port lower end, connect right spool with ripple in body cavity, an end of connecting rod connects upper and lower breathing body, and the other end of connecting rod passes powder metallurgy sleeve and the crank hinge joint that is loaded on lower shell body; When the breathing body was gone up in the connecting rod drive and the breathing body moves downward down, epicoele became low-pressure cavity, and the air in the suction inlet pipe and the pump housing enters epicoele by middle spool, and the air of cavity of resorption is compressed simultaneously, and left spool is closed, the outside atmosphere of exhaling of right spool; When the breathing body is gone up in the connecting rod drive and the breathing body moves upward down, the air of epicoele is compressed and becomes high pressure, cavity of resorption becomes low-pressure cavity, middle spool is closed, left side spool valve is exhaled to cavity of resorption, simultaneously close circulation like this at atmospheric action bottom right spool, make a side of the housing inner chamber connecting rod of sealing form an open to atmosphere expiration chamber and the induction chamber of breathing the body opposite side, intake pipe of the present utility model top is provided with liquid-level switch, be communicated with the induction chamber of breathing body by connecting pipeline, can take out pump water inlet pipe and the interior air of impeller so that inhale vacuum system, low level water sucted and be full of intake pipe and impeller cavity, and preventing that by electrically-controlled valve medium from entering the suction vacuum system because of suction function, ball float was started working when induction chamber was sucted at liquid; Described induction chamber, by sucking pipe valve, cylinder chamber, the chuck layer, ball float, ball lever, the liquid-level switch contact, on suction pipe, be connected with the cylinder chamber of chuck layer, cylinder chamber is built-in with the ball float that ball lever one end connects, the other end of ball float can touch mutually with the liquid-level switch contact, it selects the ball float of unlike material for use according to the working condition of medium, according to law of buoyancy, in suction pipe and cylinder chamber, be full of medium, ball float is floated, ball float rises under floating function, ball float and liquid-level switch contacting when reaching a certain height, electrical signal of liquid-level switch contact output this moment, this signal drives electric control valve and closes, cut off the path of medium and respiratory chamber, prevent that medium from entering respiratory chamber because of suction function; This signal also can be used as the control signal when using magnetic clutch simultaneously.In cylindrical shell chuck layer, can lead to thermal insulation medium, prevent that high viscosity or easy crystal medium from boning in cylindrical shell.Described envelope air chamber is made up of check valve body, chuck layer, valve rod, spool, valve port, connects the chuck layer in the outside of check valve body, and valve port is established in the bottom in the valve body, is equipped with the spool that valve rod connects on valve port; Before pump was breathed and finished, one-way valve was in closed condition all the time, to guarantee the breathing performance normal reliable of pump; After treating that the pump breathing finishes, pressure medium is opened valve, and medium begins normal conveying; The pump housing of described companion's temperature layer, the big cavity pump cover of companion's temperature layer, the induction chamber of companion's temperature layer, companion's temperature layer in the envelope air chamber of companion's temperature layer can be if do not establish, when conveying easily-crystallized, easily solidify, high temperature, inflammable, during explosive medium, the logical medium of heating or cooling off in the chuck layer, they are made up of chuck layer and the warm medium of companion respectively, at the pump housing, big cavity pump cover, the body cavity of induction chamber, the outside of envelope air chamber check valve body is respectively equipped with the chuck layer, logical heating or cooling medium in the chuck layer, when not conveying easily-crystallized, easily solidify or during the medium of high temperature, its pump housing, pump cover, induction chamber, the envelope air chamber can be processed into the not General Construction of companion's temperature layer, uses very convenient; Between the pump housing and bearing housing,, when it carries Korrosionsmedium,, combine the above technical measures of being taked, realize the purpose of this utility model even pump leaks major accidents such as the part corrosion fracture also can not occur to some extent with the middle linkage section of corrosion protection material system.

Compared with the prior art the utility model has adopted the respiratory chamber of novel suction vacuum, not only need not to pour water in advance, just can reach pump startup after, directly air-breathing, exhale, go up the purpose of water, work, zero leakage; And at the bottom of its bearing housing cooling chamber is arranged, but lubricant oil in the cooling bearing case and the big cavity pump cover that adopts companion's temperature layer, realize the zero leakage of the medium of the various harsh conditions of conveying, safe and reliable, this is in the leakage that prevents the poisonous and harmful medium, solve " three wastes ", new approach has been opened up in aspects such as minimizing environmental pollution, and its economic and social benefit is very remarkable.

Description of drawings

The utility model has two width of cloth accompanying drawings wherein:

Accompanying drawing 1: the main TV structure schematic representation that is one of embodiment of the present utility model

Accompanying drawing 2: two the main TV structure schematic representation that is embodiment of the present utility model

Among the figure 1, suck pipe valve 2, cylinder chamber 3, chuck layer 4, ball float 5, ball lever 6, liquid-level switch contact 7, connecting pipeline 8, pump housing outlet 9, check valve body 10, valve rod 11, spool 12, on, lower shell body 13, middle spool 14, ripple sealing film 15, last breathing body 16, under breathe body 17, a left side, right spool 18, connecting rod 19, powder metallurgy axle sleeve 20, bearing housing 21, pump shaft 22, eccentric wheel external gear 23, bearing 24, slip internal gear 25, bearing 26, crank 27, middle linkage section 28, sealing cover 29, seal 30, axle sleeve 31, clutch handle 32, the pump housing 33, big cavity pump cover 34, impeller 35 preoral loops 36, electric control valve 37, back choma

Embodiment

Shown in Figure 1 is one of embodiment of the present utility model, it is the respiration type petrochemical process pump of conveying easily-crystallized medium, its structure comprises: at the pump housing 32, big cavity pump cover 33, the cylinder chamber 2 of induction chamber, the outside weldings chuck layer 3 of the check valve body 9 of envelope air chamber, logical medium of heating in chuck layer 3, pump shaft 21 1 ends dress preoral loop 35 in the pump housing 32, impeller 34, back choma 37, axle sleeve 30, outside axle sleeve 30, adorn big cavity pump cover 33, in axle sleeve 30 and the stuffing box packing 29 of 33 dresses of big cavity pump cover, sealing cover 28, the other end of pump shaft 21 is bearing in the end with bearing 23 to be had in the bearing housing 20 of cooling chamber, one end of the pump housing 32 is connected with an end of the middle linkage section 27 of stainless steel, the other end of the middle linkage section 27 of stainless steel is connected on the bearing housing 20, dress eccentric wheel external gear 22 on 21 sections of the pump shafts in bearing housing 20, the slip internal gear 24 that can be meshed with eccentric wheel external gear 22, slip internal gear 24 is connected with clutch handle 31, the outer ring cover of bearing 25 cranks 26, crank 26 connects by connecting rod 18, powder metallurgy axle sleeve 19, on, lower shell body 12, middle spool 13, ripple sealing film 14, on, under breathe body 15,16, a left side, the respiratory chamber of the one-way valve that right spool 17 is formed and the suction vacuum of ripple sealing film, the upper shell 12 of inhaling the respiratory chamber of vacuum is connected with the induction chamber of connecting pipeline 7 with companion's temperature layer, the induction chamber of companion's temperature layer is by sucking pipe valve 1, cylinder chamber 2, chuck layer 3, ball float 4, ball lever 5, liquid-level switch contact 6 is formed, dress electric control valve 36 on the connecting pipeline 7 is adorned by check valve body 9 at outlet 8 places of the pump housing 32, chuck layer 3, valve rod 10, spool 11, the envelope air chamber of companion's temperature layer that valve port is formed.

Shown in Figure 2 is embodiment's of the present utility model two, is to carry the not respiration type petrochemical process pump of easy crystal medium, does not establish companion's temperature layer in the outside of the check valve body 9 of the cylinder chamber 2 of the pump housing 32, pump cover 33, induction chamber, envelope air chamber; Other is identical with one of embodiment.

Claims

1, a kind of respiration type petrochemical process pump, comprise the pump housing (32), impeller (34), pump cover (33), pump shaft (21), be characterised in that: its structure is mainly by the pump housing (32) of accompanying the temperature layer, the closed chamber of the big cavity pump cover (33) of companion's temperature layer, bearing housing (20), middle linkage section (27), connecting rod synchronous interface mechanism, inhale the respiratory chamber of vacuum, the induction chamber of companion's temperature layer, the envelope air chamber of companion's temperature layer, electric control valve (36) is formed, one end of pump shaft (21) is in the pump housing (32) of companion's temperature layer, adorn preoral loop (35) on its shaft part, impeller (34), back choma (37), the closed chamber of big cavity pump cover (33), the other end of pump shaft (21) is bearing in the end with bearing (23) to be had in the bearing housing (20) of cooling chamber, middle linkage section (27) with corrosion protection material system between the pump housing (32) of companion temperature layer and bearing housing (20) body is connected, pump shaft (21) in the bearing housing (20) is gone up dress and the synchronous connecting rod that rotates of pump shaft (21). synchronous interface mechanism, connecting rod synchronous interface mechanism connects the respiratory chamber of the suction vacuum of being made up of one-way valve (9) and ripple sealing film (14), induction chamber at the dress companion of pump intake place temperature layer, locate to adorn the envelope air chamber of accompanying the temperature layer in pump housing outlet (8), the connecting pipeline between induction chamber and respiratory chamber (7) is gone up dress electric control valve (36).

2, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: the closed chamber of described big cavity pump cover (33) is made up of big cavity pump cover (33), axle sleeve (30), seal (29), the sealing cover (28) of companion's temperature layer, dress axle sleeve (30) is gone up the big cavity pump cover (33) of dress companion temperature layer at axle sleeve (30) on pump shaft (21) section of impeller (34), between the big cavity pump cover (33) of axle sleeve (30) and companion's temperature layer, adorn seal (29), sealing cover (28).

3, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: described connecting rod synchronous interface mechanism is by pump shaft (21), bearing housing (20), eccentric wheel external gear (22), slip internal gear (24), bearing (25), crank (26), connecting rod (18), clutch handle (31) is formed, dress eccentric wheel external gear (22) on pump shaft (21) section in bearing housing (20), slip internal gear (24) with eccentric wheel external gear (22) engagement, insert bearing (25) on the eccentric wheel of external gear (22) external diameter, crank (26) are overlapped in bearing (25) outer ring, crank (26) and connecting rod (18) hinge joint, slip internal gear (24) connects clutch handle (31).

4, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: the suction vacuum respiratory chamber that described one-way valve (9) and ripple sealing film (14) are formed, form by upper and lower casing (12), middle spool (13), ripple sealing film (14), upper and lower breathing body (15), (16), left and right spool (17), connecting rod (18), powder metallurgy axle sleeve (19); Last, in the body cavity of lower shell body (12) combination, upper shell is established valve port in (12), there is middle spool (13) the valve port lower end, make respectively with ripple sealing film (14) in the body cavity, under breathe body (15), (16) sealing, and be separated into, following cavity, the valve port lower end of last breathing body (15) connects left spool (17), the bottom valve port of lower shell body (16) connects right spool (17), on, under breathe body (15), (16) end with connecting rod (18) is connected, and the other end of connecting rod (18) passes the powder metallurgy axle sleeve (19) and crank (26) hinge joint that is loaded on lower shell body (12).

5, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: the induction chamber of described companion's temperature layer, by suction pipe (1), cylinder chamber (2), chuck layer (3), ball float (4), ball lever (5), liquid-level switch contact (6), on suction pipe (1), be connected with the cylinder chamber (2) of chuck layer (3), cylinder chamber (2) is built-in with the ball float (4) that ball lever (5) one ends connect, and the other end of ball float (4) can touch mutually with liquid-level switch contact (6).

6, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: the envelope air chamber of described companion's temperature layer is made up of check valve body (9), chuck layer (3), valve rod (10), spool (11), valve port, be externally connected to chuck layer (3) in check valve body, valve port is established in bottom in the valve body, is equipped with the spool (11) that valve rod (10) connects on valve port.

7, by the described respiration type petrochemical process pump of claim 1, it is characterized in that: the companion's temperature layer in the envelope air chamber of the big cavity pump cover (33) of the pump housing (32) of described companion's temperature layer, companion's temperature layer, the induction chamber of companion's temperature layer, companion's temperature layer can be if do not establish, when not establishing companion's temperature layer, the check valve body (9) of the cylinder chamber of its pump housing, pump cover, induction chamber (2), envelope air chamber can be processed into General Construction respectively; When establishing companion's temperature layer, they are made up of chuck layer (3) and the warm medium of companion respectively, be respectively equipped with chuck layer (3) in the cylinder chamber (2) of the pump housing (32), big cavity pump cover (33), induction chamber, the outside of envelope air chamber check valve body (9), logical heating or cooling medium in chuck layer (3).