CN2903793Y - Water tank constant pressure system of water heater - Google Patents

Water tank constant pressure system of water heater Download PDF

Info

Publication number
CN2903793Y
CN2903793Y CN 200620040895 CN200620040895U CN2903793Y CN 2903793 Y CN2903793 Y CN 2903793Y CN 200620040895 CN200620040895 CN 200620040895 CN 200620040895 U CN200620040895 U CN 200620040895U CN 2903793 Y CN2903793 Y CN 2903793Y
Authority
CN
China
Prior art keywords
cavity
water
piston
unidirectional
water tank
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 - Lifetime
Application number
CN 200620040895
Other languages
Chinese (zh)
Inventor
韩绍良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 200620040895 priority Critical patent/CN2903793Y/en
Application granted granted Critical
Publication of CN2903793Y publication Critical patent/CN2903793Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Multiple-Way Valves (AREA)

Abstract

The utility model discloses a water tank constant-voltage system of a water heater which comprises a hydraulic means and two four-way change-over valves. The hydraulic means comprises four separating cavities with changeable volumes, wherein the first cavity and the second cavity are provided with pipelines, the third cavity is provided with a unidirectional water outlet pipe connected with a hot water opening and a unidirectional water inlet pipe connected with an insulated water tank. The fourth cavity is provided with a unidirectional water outlet pipe communicated with the unidirectional water outlet pipe of the third cavity and a unidirectional water inlet pipe communicated with the unidirectional inlet pipe of the third cavity. The volume sum of the first cavity and the third cavity and the volume sum of the second cavity and the fourth cavity keep invariant. A change-over valve is arranged on the pipes of the first cavity and the second cavity, and the two pipes are communicated with a tap water nozzle and the insulated water tank through the change-over valve. By employing the constant-voltage system of the utility model, the insulated water tank has no need to bear pressure and simultaneously the bearing pressure of the yielding water is guaranteed.

Description

The water-heater water tank constant-voltage system
Technical field
The utility model relates to a kind of water-heater water tank constant-voltage system, and the attemperater that relates in particular to a kind of water heater does not bear pressure, guarantees the constant-voltage system of water heater water outlet pressure-bearing simultaneously.
Background technology
Along with improving constantly of living standard, water heater generally enters common people family, becomes the indispensable utensil in the life.The material of the attemperater of water heater should possess enough intensity and useful life longevity.Once used polypropylene plastics and copper (press in all being used for and be no more than the i.e. 2 meters water tanks that head is pressed of 19.6kPa), zinc sheet metal etc. to make the water tank material abroad, they are owing to insufficient strength or be difficult for welding, and shortcomings such as poor reliability are seldom used now.
What generally be used for water heater is the steel enamel cistern, its advantage is the manufacturing of available thicker (about 3mm) general steel plate, welding procedure is simple, intensity, stiffness are good, endurance is better, but postwelding need carry out the enamel operation, and the anticorrosion of necessary attached in use magnesium rod, cost is higher, and is out of order easily.
What select for use in addition then is stainless steel material.Stainless steel possesses good intensity, plasticity, corrosion resistance and weldability, and the water tank that is welded into thin corrosion resistant plate not only gently but also strong.But the attemperater that thin stainless steel material is made, the hydraulic pressure intensity that it can bear is limited, if be used for large-scale solar water heater, because pressure-bearing is big, water tank generally just can only be selected thicker enamel material for use.
The utility model content
The purpose of this utility model is, a kind of water-heater water tank constant-voltage system is provided, and must select thicker enamel material to solve existing water-heater water tank for use because of pressure-bearing, and cost is higher, and the technical problem that breaks down easily.
In order to achieve the above object, the technical solution of the utility model is as follows:
A kind of water-heater water tank constant-voltage system comprises: hydraulic means is located at attemperater, from the beginning between the mouth of a river and the hot water mouth; This hydraulic means comprises the cavity of four mutual isolation and variable volumeization, and wherein, first cavity is provided with pipeline; Second cavity is provided with pipeline; The 3rd cavity is provided with unidirectional outlet pipe and unidirectional water inlet pipe, and unidirectional outlet pipe connects the hot water mouth, and unidirectional water inlet pipe connects attemperater; The 4th cavity is provided with unidirectional outlet pipe and unidirectional water inlet pipe, and unidirectional outlet pipe communicates with unidirectional outlet pipe on the 3rd cavity, and unidirectional water inlet pipe communicates with unidirectional water inlet pipe on the 3rd cavity; First cavity and the 3rd cavity volume sum remain unchanged; Second cavity and the 4th cavity volume sum remain unchanged; And two position and four-way reversing valves, be located on first cavity and the second cavity pipeline, this two pipeline by this reversal valve with the mouth of a river, attemperater link to each other from the beginning.
After adopting constant-voltage system of the present utility model, attemperater needn't bear pressure, guarantees the water outlet pressure-bearing simultaneously, that is to say, whole water heater still satisfies the water bearing requirements, does not influence result of use.This has saved cost greatly with regard to having overcome traditional extra high problem of large-scale carrying water tank cost.Simultaneously, because attemperater pressure-bearing not makes that large-scale in the past press-bearing water tank must also be overcome with the technology prejudice of thicker enamel material manufacturing.In addition, solar water heater generally adopts the large insulation water tank, uses for the multi-user, just need install the measuring equipment of using hot water this moment additional.Install the water heater of native system additional, in use, if do not put hot water, cold water just advances not go, and so just needn't further save cost in that the water metering instrument is installed in addition.
Particularly, separate by piston between first cavity and the 3rd cavity, separate by piston between second cavity and the 4th cavity.
All be provided with push rod on the above-mentioned two-piston, two push rods are connected as a single entity; First cavity and second cavity separate by dividing plate.
Perforate on the described dividing plate, two push rods are through in this hole and link to each other.
Be provided with the spring that links to each other with piston in the 3rd cavity and the 4th cavity.
Be provided with cavity between described first cavity and the 4th cavity, separate by dividing plate between this cavity and first cavity; Separate by piston between cavity and the 4th cavity.Be provided with cavity between described second cavity and the 3rd cavity, separate by dividing plate between this cavity and second cavity; Separate by piston between cavity and the 3rd cavity.Separate by piston between first cavity and second cavity.Above-mentioned three pistons link to each other by push rod; This hole is passed in perforate on the dividing plate, push rod.
Description of drawings
Fig. 1 is the first example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model;
Fig. 2 is the second example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model;
Fig. 3 is the 3rd an example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model.
The specific embodiment
According to Fig. 1 to Fig. 3, provide preferred embodiment of the present utility model, and described in detail below, enable to understand better function of the present utility model, characteristics.
The utility model is to be formed by hydraulic motor and hydraulic pump combination.The power that is provided by running water drives the motor motion, and motor passes to the pressure that produces liquid on the pump to power again.Fig. 1 is the first example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model.As shown in the figure, the water-heater water tank constant-voltage system comprises hydraulic means and two position and four-way reversing valves 6.Hydraulic means is located at attemperater 5, from the beginning between the mouth of a river 7 and the hot water mouth 8.This hydraulic means comprises the cavity of four mutual isolation and variable volumeization.First cavity 1 is provided with pipeline 11, the second cavitys 2 and is provided with pipeline 21.The 3rd cavity 3 is provided with unidirectional outlet pipe 32 and unidirectional water inlet pipe 31, and unidirectional outlet pipe 32 connects hot water mouth 8, and unidirectional water inlet pipe 31 connects attemperater 5; The 4th cavity 4 is provided with unidirectional outlet pipe 42 and unidirectional water inlet pipe 41, and unidirectional outlet pipe 42 communicates with unidirectional outlet pipe 32, and unidirectional water inlet pipe 41 communicates with unidirectional water inlet pipe 31.Two position and four-way reversing valves 6 are located on pipeline 11 and the pipeline 21, pipeline 11 and pipeline 21 by this reversal valve 6 with the mouth of a river 7, attemperater 5 link to each other from the beginning.Separate by piston 12 between first cavity 1 and the 3rd cavity 3, separate by piston 22 between second cavity 2 and the 4th cavity 4.Piston 12 is provided with push rod 13, and piston 22 is provided with push rod 23, and push rod 13 and push rod 23 are connected as a single entity; First cavity 1 and second cavity 2 separate by dividing plate 91.Perforate on the described dividing plate 91, push rod 13 with link to each other in push rod 23 is through this hole.Dividing plate 91 and hydraulic cylinder, push rod 13,23 sealings, and and the fixed one of cylinder body.
Running water enters in first cavity 1 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, dividing plate 91 in first cavity 1 is owing to be fixed on the hydraulic cylinder, piston 12 right laterals on water pressure pushing the right, the 3rd cavity 3 pressurizeds and volume diminishes, produce corresponding pressure, the water in the 3rd cavity 3 flows out hot water mouth 8 through unidirectional outlet pipe 32 and offers user's use.Simultaneously, because the push rod 13 of piston 12 is connected as a single entity with the push rod 23 of piston 22, piston 12 right laterals just drive piston 22 and also slide to the right, and this moment, the volume of the 4th cavity 4 became big, its internal pressure diminishes, and hot water is pressed into the 4th cavity 4 through unidirectional water inlet pipe 41 in the attemperater 5.The right lateral of piston 22 also makes second cavity, 2 pressurizeds simultaneously and volume diminishes, and the relevant pressure that produce this moment replenishes the cold water in second cavity 2 in the attemperater 5 by two position and four-way reversing valves 6 through piping 21.
When piston 12 runs to the right-hand member top of the 3rd cavity 3, two-position four way change valve changes 6 commutations, running water enters in second cavity 2 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, dividing plate 91 in second cavity 2 is owing to be fixed on the hydraulic cylinder, piston 22 left lateral on the water pressure pushing left side, the 4th cavity 4 pressurizeds and volume diminishes produce corresponding pressure, and the water in the 4th cavity 4 flow out hot water mouths 8 through unidirectional outlet pipe 42 and offer the user and use.Simultaneously, because the push rod 23 of piston 22 is connected as a single entity with the push rod 13 of piston 12, piston 22 left lateral just drive piston 12 and also slide left, and this moment, the volume of the 3rd cavity 3 became big, its internal pressure diminishes, and hot water is pressed into the 3rd cavity 3 through unidirectional water inlet pipe 31 in the attemperater 5.The left lateral of piston 12 also makes simultaneously wins cavity 1 pressurized and volume diminishes, and the relevant pressure that produce this moment replenishes the cold water in first cavity 1 in the attemperater 5 by two position and four-way reversing valves 6 through piping 11.When piston 12 moved to the left top of the 4th cavity 4, the hot water that two-position four way change valve 6 commutations repeat above action supply continuous pressure used to the user.
Fig. 2 is the second example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model.As shown in the figure, the water-heater water tank constant-voltage system comprises hydraulic means and two position and four-way reversing valves 6.Hydraulic means is located at attemperater 5, from the beginning between the mouth of a river 7 and the hot water mouth 8.This hydraulic means comprises the cavity of four mutual isolation and variable volumeization.First cavity 1 is provided with pipeline 11, the second cavitys 2 and is provided with pipeline 21.The 3rd cavity 3 is provided with unidirectional outlet pipe 32 and unidirectional water inlet pipe 31, and unidirectional outlet pipe 32 connects hot water mouth 8, and unidirectional water inlet pipe 31 connects attemperater 5; The 4th cavity 4 is provided with unidirectional outlet pipe 42 and unidirectional water inlet pipe 41, and unidirectional outlet pipe 42 communicates with unidirectional outlet pipe 32, and unidirectional water inlet pipe 41 communicates with unidirectional water inlet pipe 31.Two position and four-way reversing valves 6 are located on pipeline 11 and the pipeline 21, pipeline 11 and pipeline 21 by this reversal valve 6 with the mouth of a river 7, attemperater 5 link to each other from the beginning.Separate by piston 12 between first cavity 1 and the 3rd cavity 3, separate by piston 22 between second cavity 2 and the 4th cavity 4.Piston 12 is provided with push rod 13, and piston 22 is provided with push rod 23.First cavity 1 separates fully with second cavity 2.Be provided with spring 33 in the 3rd cavity 3, spring 33 1 ends are connected in the top of the 3rd cavity 3, and the other end connects piston 12.Be provided with spring 43 in the 4th cavity 4, spring 43 1 ends are connected in the top of the 4th cavity 4, and the other end connects piston 22.
Running water enters in first cavity 1 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, water pressure pushing piston 12 is up, the 3rd cavity 3 pressurizeds and volume diminishes produce corresponding pressure, and the water in the 3rd cavity 3 flow out hot water mouths 8 through unidirectional outlet pipe 32 and offer the user and use.
After spring 33 is subjected to maximum compression, two-position four way change valve changes 6 commutations, running water enters in second cavity 2 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, water pressure pushing piston 22 is up, the 4th cavity 4 pressurizeds and volume diminishes, produce corresponding pressure, the water in the 4th cavity 4 flows out hot water mouth 8 through unidirectional outlet pipe 42 and offers user's use.Meanwhile, the spring 33 in the 3rd cavity 3 is subjected to the restoring force effect and descending, and it is descending to drive piston 12, and the hot water in the attemperater 5 is pressed into the 3rd cavity 3 through unidirectional water inlet pipe 31.The volume of first cavity 1 diminishes when piston 12 is descending, and the relevant pressure that produce this moment replenishes the cold water in first cavity 1 in the attemperater 5 by two position and four-way reversing valves 6 through piping 11.
After spring 43 is subjected to maximum compression, two-position four way change valve changes 6 commutations, running water enters in first cavity 1 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, water pressure pushing piston 12 is up, the 3rd cavity 3 pressurizeds and volume diminishes, produce corresponding pressure, the water in the 3rd cavity 3 flows out hot water mouth 8 through unidirectional outlet pipe 32 and offers user's use.Meanwhile, the spring 43 in the 4th cavity 4 is subjected to the restoring force effect and descending, and it is descending to drive piston 22, and the hot water in the attemperater 5 is pressed into the 4th cavity 4 through unidirectional water inlet pipe 41.The volume of second cavity 2 diminishes when piston 22 is descending, and the relevant pressure that produce this moment replenishes the cold water in second cavity 2 in the attemperater 5 by two position and four-way reversing valves 6 through piping 21.Next, the hot water of action supply continuous pressure used to the user more than two-position four way change valve 6 commutations repeated.
Fig. 3 is the 3rd an example structure schematic diagram of water-heater water tank constant-voltage system of the present utility model.As shown in the figure, this constant-voltage system is compared with first embodiment, and the pipeline of both outsides is identical, and difference only is the structure of hydraulic means.The hydraulic means of present embodiment also comprises the cavity of four mutual isolation and variable volumeization.Between first cavity 1 and the 4th cavity 4, also be provided with cavity B, separate by dividing plate 93 between the cavity B and first cavity 1.Separate by piston 44 between cavity B and the 4th cavity 4.Be provided with cavity A between second cavity 2 and the 3rd cavity 3, separate by dividing plate 92 between the cavity A and second cavity 2.Separate by piston 24 between cavity A and the 3rd cavity 3.Separate by piston 94 between first cavity 1 and second cavity 2.Piston 24,94,44 is connected as a single entity by push rod 95.Perforate on the dividing plate 92,93, push rod 95 passes this hole.95 sealings of dividing plate the 92, the 93rd and hydraulic cylinder, push rod, and and the fixed one of cylinder body.In cavity A and the cavity B for air or vacuumize.
Running water enters in first cavity 1 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, dividing plate 93 in first cavity 1 is owing to be fixed on the hydraulic cylinder, water pressure pushing piston 94 left lateral, the 3rd cavity 3 pressurizeds and volume diminishes, produce corresponding pressure, the water in the 3rd cavity 3 flows out hot water mouth 8 through unidirectional outlet pipe 32 and offers user's use.Simultaneously, because piston 94 is connected as a single entity by push rod 95 and piston 44, piston 94 left lateral just drive piston 44 and also slide left, and this moment, the volume of the 4th cavity 4 became big, and its internal pressure diminishes, and hot water is pressed into the 4th cavity 4 through unidirectional water inlet pipe 41 in the attemperater 5.The left lateral of piston 94 also makes second cavity, 2 pressurizeds simultaneously and volume diminishes, and the relevant pressure that produce this moment replenishes the cold water in second cavity 2 in the attemperater 5 by two position and four-way reversing valves 6 through piping 21.
When piston 44 runs to dividing plate 93 places, two-position four way change valve changes 6 commutations, running water enters in second cavity 2 by two position and four-way reversing valves 6 through the mouth of a river 7 from the beginning, dividing plate 92 in second cavity 2 is owing to be fixed on the hydraulic cylinder, water pressure pushing piston 94 right laterals, the 4th cavity 4 pressurizeds and volume diminishes produce corresponding pressure, and the water in the 4th cavity 4 flow out hot water mouths 8 through unidirectional outlet pipe 42 and offer the user and use.Simultaneously, because piston 94 is connected as a single entity by push rod 95 and piston 24, piston 95 right laterals just drive piston 24 and also slide to the right, and this moment, the volume of the 3rd cavity 3 became big, and its internal pressure diminishes, and hot water is pressed into the 3rd cavity 3 through unidirectional water inlet pipe 31 in the attemperater 5.The right lateral of piston 94 also makes simultaneously wins cavity 1 pressurized and volume diminishes, and the relevant pressure that produce this moment replenishes the cold water in first cavity 1 in the attemperater 5 by two position and four-way reversing valves 6 through piping 11.The hot water of action supply continuous pressure uses to the user more than piston 94 moves to dividing plate 93 places, and two-position four way change valve 6 commutations repeat.
The front provides the description to preferred embodiment, so that any technical staff in this area can use or utilize the utility model.Description by three embodiment, as can be seen, as long as hydraulic means of the present utility model possesses first cavity 1 and the 3rd cavity 3 volume sums remain constant and second cavity 2 and the 4th cavity 4 volume sums remain constant feature, no matter how concrete structure changes, all can satisfy the purpose of this utility model.To this preferred embodiment, those skilled in the art can make various modifications or conversion on the basis that does not break away from the utility model principle.Should be appreciated that in the specification for embodiment only be a kind of preferred embodiment, modification or conversion that this embodiment is made do not break away from protection domain of the present utility model.

Claims (9)

1, a kind of water-heater water tank constant-voltage system is characterized in that, this system comprises:
Hydraulic means is located at attemperater (5), from the beginning between the mouth of a river (7) and the hot water mouth (8); This hydraulic means comprises the cavity of four mutual isolation and variable volumeization, wherein,
First cavity (1) is provided with pipeline (11);
Second cavity (2) is provided with pipeline (21);
The 3rd cavity (3) is provided with unidirectional outlet pipe (32) and unidirectional water inlet pipe (31), and unidirectional outlet pipe (32) connects hot water mouth (8), and unidirectional water inlet pipe (31) connects attemperater (5);
The 4th cavity (4) is provided with unidirectional outlet pipe (42) and unidirectional water inlet pipe (41), and unidirectional outlet pipe (42) communicates with unidirectional outlet pipe (32), and unidirectional water inlet pipe (41) communicates with unidirectional water inlet pipe (31);
First cavity (1) remains unchanged with the 3rd cavity (3) volume sum; Second cavity (2) remains unchanged with the 4th cavity (4) volume sum; And
Two position and four-way reversing valves (6) are located on pipeline (11) and the pipeline (21), pipeline (11) and pipeline (21) by this reversal valve (6) with the mouth of a river (7), attemperater (5) link to each other from the beginning.
2, water-heater water tank constant-voltage system as claimed in claim 1 is characterized in that, separates by piston (12) between first cavity (1) and the 3rd cavity (3), separates by piston (22) between second cavity (2) and the 4th cavity (4).
3, water-heater water tank constant-voltage system as claimed in claim 2 is characterized in that, piston (12) is provided with push rod (13), and piston (22) is provided with push rod (23), and push rod (13) and push rod (23) are connected as a single entity; First cavity (1) and second cavity (2) separate by dividing plate (91).
4, water-heater water tank constant-voltage system as claimed in claim 3 is characterized in that, described dividing plate (91) is gone up perforate, and push rod (13) is through in this hole with push rod (23) and links to each other.
5, water-heater water tank constant-voltage system as claimed in claim 2 is characterized in that, is provided with the spring (33) that links to each other with piston (12) in the 3rd cavity (3); Be provided with the spring (43) that links to each other with piston (22) in the 4th cavity (4).
6, water-heater water tank constant-voltage system as claimed in claim 1 is characterized in that, is provided with cavity (B) between described first cavity (1) and the 4th cavity (4), separates by dividing plate (93) between cavity (B) and first cavity (1); Separate by piston (44) between cavity (B) and the 4th cavity (4).
7, water-heater water tank constant-voltage system as claimed in claim 6 is characterized in that, is provided with cavity (A) between described second cavity (2) and the 3rd cavity (3), separates by dividing plate (92) between cavity (A) and second cavity (2); Separate by piston (24) between cavity (A) and the 3rd cavity (3).
8, water-heater water tank constant-voltage system as claimed in claim 7 is characterized in that, separates by piston (94) between first cavity (1) and second cavity (2).
9, water-heater water tank constant-voltage system as claimed in claim 8 is characterized in that, piston (24), (94), (44) link to each other by push rod (95); Perforate is gone up in dividing plate (92), (93), and push rod (95) passes this hole.
CN 200620040895 2006-04-07 2006-04-07 Water tank constant pressure system of water heater Expired - Lifetime CN2903793Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620040895 CN2903793Y (en) 2006-04-07 2006-04-07 Water tank constant pressure system of water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620040895 CN2903793Y (en) 2006-04-07 2006-04-07 Water tank constant pressure system of water heater

Publications (1)

Publication Number Publication Date
CN2903793Y true CN2903793Y (en) 2007-05-23

Family

ID=38079206

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200620040895 Expired - Lifetime CN2903793Y (en) 2006-04-07 2006-04-07 Water tank constant pressure system of water heater

Country Status (1)

Country Link
CN (1) CN2903793Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100436960C (en) * 2006-05-10 2008-11-26 韩绍良 System and method of keeping normal pressure for water tank of water heater
CN103423875A (en) * 2012-05-15 2013-12-04 厦门锐思达机电科技有限公司 Water saving device of water heater
CN103743108A (en) * 2014-01-16 2014-04-23 重庆科技学院 Water saving device of water heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100436960C (en) * 2006-05-10 2008-11-26 韩绍良 System and method of keeping normal pressure for water tank of water heater
CN103423875A (en) * 2012-05-15 2013-12-04 厦门锐思达机电科技有限公司 Water saving device of water heater
CN103743108A (en) * 2014-01-16 2014-04-23 重庆科技学院 Water saving device of water heater
CN103743108B (en) * 2014-01-16 2016-04-13 重庆科技学院 Water-saving device of water heater

Similar Documents

Publication Publication Date Title
CN201120256Y (en) Reverse osmosis membrane cleaning apparatus
CN2903793Y (en) Water tank constant pressure system of water heater
CN109386515B (en) Energy-saving large-sized hydraulic cylinder test bed
CN2826369Y (en) Volume pipe type multi-phase flowmeter
CN206530454U (en) A kind of carbon dioxide oil recovery water alternating gas injection pump
CN100436960C (en) System and method of keeping normal pressure for water tank of water heater
CN2856679Y (en) Flange 2-way verticle glass reinforced plastic viewing mirror
CN2839773Y (en) Water-supply valve of solar water heater
CN203770060U (en) Multi-head mass flow combined mechanical diaphragm pump
CN2777329Y (en) Anti drawn-off type expansion means
CN201310743Y (en) Underground-liquefied petroleum gas storage tank filling system
CN2454609Y (en) Composite tube with plastic and thin-wall stainless steel lining
CN1807946A (en) Glass fibre reinforced plastic check valve
CN203987371U (en) A kind of water circulation passes ordering system
CN220892220U (en) Biomass boiler makeup water treatment system
CN103557324A (en) Separate type pressure-bearing anti-corrosion device
CN109243266A (en) A kind of instructional device for simulating bridge rectifier
CN203009929U (en) Rubber flap check valve
CN2778413Y (en) Quick cleaning device for hydraulic system
CN202381001U (en) Return pressure compensating device for pressure-control well drilling
CN2796605Y (en) Electric heating water bottle
CN2812003Y (en) Water changing device
CN101205805B (en) Oil production string
CN201050455Y (en) Bi-directional manual pump possessing minisize direction control valve
CN2913783Y (en) New type titanium-alloy multiple tubes

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Effective date of abandoning: 20081126

C25 Abandonment of patent right or utility model to avoid double patenting