CN102536725B - Pumping system, control method thereof, and fire fighting equipment - Google Patents

Pumping system, control method thereof, and fire fighting equipment Download PDF

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Publication number
CN102536725B
CN102536725B CN201110348201.7A CN201110348201A CN102536725B CN 102536725 B CN102536725 B CN 102536725B CN 201110348201 A CN201110348201 A CN 201110348201A CN 102536725 B CN102536725 B CN 102536725B
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China
Prior art keywords
oil
plunger pump
medium
oil cylinder
pumping
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CN102536725A (en
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易小刚
徐国荣
胡亮
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Beijing Sany Heavy Machinery Co Ltd
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Beijing Sany Heavy Machinery Co Ltd
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Abstract

The invention discloses a pumping system, which comprises at least two plunger pumps, wherein the plunger pumps are alternately reversed; when one plunger pump arrives a reversing position, the other plunger pump starts to carry out medium pumping operation; and the number of the plunger pumps can be two, when one of the two plunger pumps arrives the reversing position, the other one of the two plunger pumps starts to carry out medium pumping operation. In addition, two cylinders are arranged in any one plunger pump and are respectively a first cylinder (51) and a second cylinder (52) which are respectively arranged on two sides of a conveying cylinder (53). Due to the structural design of the pumping system, on one hand, the continuity of medium pumping can be improved, and the occurrence of the phenomenon of cutting off is prevented; and on the other hand, the pressure and the flux on a medium outlet in forward and reverse strokes are favored to be equal. Further, the invention also discloses a control method of the pumping system and fire fighting equipment comprising the pumping system.

Description

Pumping system and controlling method thereof, fire-protection equipment
Technical field
The present invention relates to liquid medium pumping technology field, particularly a kind of pumping system.In addition the invention still further relates to, a kind of controlling method of this pumping system.Moreover, the invention still further relates to a kind of fire-protection equipment that comprises above-mentioned pumping system.
Background technique
At present, along with economic fast development, tall building, as emerged rapidly in large numbersBamboo shoots after a spring rain, is rised sheer from level ground in succession, and more and more has the trend of competitively fighting for mastery.But, be together tall building or the skyscraper fire accident again and again occurring, thereby tall building or skyscraper fire fighting and rescue just inevitably become the key subjects that modern society need to face.
In the prior art, fire service pump generally comprises two types, and one is centrifugal class water pump, and the restriction but this kind of water pump is stressed cannot meet high-rise or high-rise fire-fighting fire extinguishing demand; Another kind is common plunger class water pump, although this kind of water pump can meet pressure requirement, this kind of water pump is subject to flow restriction, also cannot meet high-rise or high-rise fire-fighting fire extinguishing demand.
In the prior art, also have a kind of biserial plunger type water pump, although this biserial plunger type water pump can meet pressure requirement, also can meet traffic requirement, but owing to being subject to the restriction of turn around time, this water pump pumps continuity is not high, normal appearance " cutout " phenomenon, thereby also unsatisfactory for the fire extinguishing effect of tall building or skyscraper.
In addition, in above-mentioned existing plunger type water pump, in the process of the positive and negative stroke motion of oil cylinder, carry cylinder to be transported to pressure and the flow of water outlet also inconsistent, that is oil cylinder is in the time of forward stroke, water outlet is a pressure and flow, and oil cylinder is in the time of reverse stroke, and water outlet is another pressure and flow.
In view of this, how pumping system of the prior art is made to improvement, thereby on the one hand can improve the continuity of medium pumping, the generation of the phenomenon that prevents from stopping; Pressure and the flow that can be conducive on the other hand to realize positive revesal medium delivery outlet equate, are the problems that those skilled in the art need solution badly.
Summary of the invention
The technical problem to be solved in the present invention is for a kind of pumping system is provided, and the structural design of this pumping system can improve the continuity of medium pumping on the one hand, the generation of the phenomenon that prevents from stopping; Pressure and the flow that can be conducive on the other hand to realize positive revesal medium delivery outlet equate.In addition, another technical problem that will solve of the present invention is for providing a kind of controlling method of above-mentioned pumping system.Moreover another technical problem that will solve of the present invention is for providing a kind of fire-protection equipment that comprises above-mentioned pumping system.
For solving the problems of the technologies described above, the invention provides a kind of pumping system, comprise plunger pump, described plunger pump comprises oil cylinder, carries cylinder and piston rod, described piston rod respectively be located at the oil cylinder piston in described oil cylinder and be connected with the piston of conveying cylinder of being located in described conveying cylinder;
The first medium chamber of described conveying cylinder and second medium chamber are by himself to medium delivery outlet one-way conduction, and the two is all communicated with medium box, and described medium box is all to the two one-way conduction; Described oil cylinder is connected with oil pump by selector valve, to make described plunger pump commutation;
The quantity of described plunger pump is at least two, and the quantity of establishing this plunger pump is n; Each described plunger pump alternate turns commutation, in the time that a plunger pump arrives commutation position, have a plunger pump and started to carry out pumped medium operation, now all pilot processs in pumped medium operation of other residue plunger pumps, are carrying out the operation of pumped medium to make arbitrary moment all have n-1 plunger pump;
And the quantity of oil cylinder is two described in any plunger pump, be respectively the first oil cylinder and the second oil cylinder, and the two is located at respectively the both sides of described conveying cylinder; The middle part of described piston rod connects described piston of conveying cylinder, its two ends are connected with the second oil cylinder piston of being located at the first oil cylinder piston of described the first oil cylinder and be located in described the second oil cylinder respectively, so that along with described piston rod movement, pumped medium operation hockets for described first medium chamber and described second medium chamber.
Preferably, the quantity of described plunger pump is two, is respectively the first plunger pump and the second plunger pump; In described the first plunger pump and described the second plunger pump, when one arrives commutation position, another one has started to carry out the operation of pumped medium.
Preferably, in described the first plunger pump and described the second plunger pump, any plunger pump includes described conveying cylinder, described the first oil cylinder, described the second oil cylinder and described selector valve; The cavity of described the first oil cylinder is divided into the first rodless cavity and the first rod chamber by its first oil cylinder piston, and the cavity of described the second oil cylinder is divided into the second rodless cavity and the second rod chamber by its second oil cylinder piston;
In described conveying cylinder, being described first medium chamber away from the cavity of described the first oil cylinder, is described second medium chamber near the cavity of described the first oil cylinder.
Preferably, in described the first plunger pump and described the second plunger pump, the selector valve of any one is equipped with and makes the first valve position of the first rodless cavity oil-feed the second rodless cavity oil return and make the second rodless cavity oil-feed and the second valve position of the first rodless cavity oil return;
So that described the first rodless cavity oil-feed, the operation of pumped medium is carried out in described first medium chamber; Described the second rodless cavity oil-feed, the operation of pumped medium is carried out in described second medium chamber.
Preferably, in described the first plunger pump and described the second plunger pump, the selector valve of any one is equipped with the first valve position that makes the first rodless cavity and the oil-feed simultaneously of the second rod chamber, also the second rodless cavity and the oil return simultaneously of the first rod chamber, and makes the second valve position of the second rodless cavity and the oil-feed simultaneously of the first rod chamber, also the first rodless cavity and the oil return simultaneously of the second rod chamber;
So that the oil-feed simultaneously of the first rodless cavity and the second rod chamber, the operation of pumped medium is carried out in described first medium chamber; The oil-feed simultaneously of the second rodless cavity and the first rod chamber, the operation of pumped medium is carried out in described second medium chamber.
Preferably, in described the first plunger pump and described the second plunger pump, the selector valve of any one is equipped with the first valve position that makes the second rod chamber oil-feed the first rod chamber oil return, and makes the second valve position of the first rod chamber oil-feed the second rod chamber oil return;
So that the second rod chamber oil-feed, the operation of pumped medium is carried out in described first medium chamber; The first rod chamber oil-feed, the operation of pumped medium is carried out in described second medium chamber.
In addition, for solving the problems of the technologies described above, the present invention also provides a kind of controlling method of above-mentioned pumping system, in any plunger pump, described the first oil cylinder is defined as the first commutation position near one end of described conveying cylinder, and its one end away from described conveying cylinder is defined as the second commutation position; On this basis, the controlling method of described pumping system comprises the steps:
S11: make the first rodless cavity oil-feed of the first plunger pump;
S12: until the first oil cylinder piston of the first plunger pump while arriving the first commutation position, makes the first rodless cavity of the second plunger pump start oil-feed;
S13: until the first oil cylinder piston of this second plunger pump while arriving the first commutation position, makes the second rodless cavity oil-feed of the first plunger pump;
S14: until the first oil cylinder piston of this first plunger pump while arriving the second commutation position, makes the second rodless cavity oil-feed of the second plunger pump;
S15: until the first oil cylinder piston of this second plunger pump is while arriving the second commutation position, then turns to and carry out above-mentioned steps S11.
Preferably, add detecting switch at described the first commutation position and described the second commutation position, described the first oil cylinder piston triggers after described detecting switch, makes accordingly described the first rodless cavity or described the second rodless cavity oil-feed.
Moreover for solving the problems of the technologies described above, the present invention also provides a kind of fire-protection equipment, comprises pumping system; Described pumping system is the pumping system described in above-mentioned any one.
On the basis of existing technology, the quantity of the plunger pump of pumping system provided by the present invention is at least two, and the quantity of establishing this plunger pump is n; Each described plunger pump alternate turns commutation, in the time that a plunger pump arrives commutation position, have a plunger pump and started to carry out pumped medium operation, now all pilot processs in pumped medium operation of other residue plunger pumps, are carrying out the operation of pumped medium to make arbitrary moment all have n-1 plunger pump.When work, when a plunger pump has started commutation while stopping medium pumping, have a plunger pump and started to carry out the operation of pumped medium, thereby realized the continuity of medium pumping.In addition, arbitrary moment all has n-1 plunger pump and is carrying out the operation of pumped medium, thereby also can guarantee flow and the pressure of medium pumping.
In addition, in the present invention, described in any plunger pump, the quantity of oil cylinder is two, be respectively the first oil cylinder and the second oil cylinder, and the two is located at respectively the both sides of described conveying cylinder; The middle part of described piston rod connects described piston of conveying cylinder, its two ends are connected with the second oil cylinder piston of being located at the first oil cylinder piston of described the first oil cylinder and be located in described the second oil cylinder respectively, so that along with described piston rod movement, pumped medium operation hockets for described first medium chamber and described second medium chamber.In the time that plunger pump carries out forward stroke motion, rodless cavity oil-feed that can the first oil cylinder, in the time that plunger pump carries out reverse stroke motion, rodless cavity oil-feed that can the second oil cylinder, under the first oil cylinder prerequisite identical with the second oil cylinder specification, pressure and flow that this kind of structural design can be conducive to realize positive revesal medium delivery outlet equate.
In sum, pumping system provided by the present invention can improve the continuity of medium pumping on the one hand, the generation of the phenomenon that prevents from stopping; Pressure and the flow that can be conducive on the other hand to realize positive revesal medium delivery outlet equate.
In addition, the controlling method of above-mentioned pumping system provided by the present invention and comprise the fire-protection equipment of above-mentioned pumping system, the two technique effect is same as described above, does not repeat them here.
Accompanying drawing explanation
Fig. 1 is the structural representation of pumping system in the first embodiment of the present invention;
Fig. 2 is that the structural representation after further improvement is made on the basis of pumping system in Fig. 1;
Fig. 3 is that the structural representation after another kind of change has been made on the basis of pumping system in Fig. 1;
Fig. 4 is the structural representation of pumping system in the second embodiment of the present invention;
Fig. 5 is the FB(flow block) of the controlling method of pumping system in an embodiment of the present invention.
Wherein, in Fig. 1 to Fig. 5, the corresponding relation between reference character and component names is:
1 fuel tank; 2 oil pumps;
3 relief valves;
4 first plunger pumps; 5 second plunger pumps;
51 first oil cylinders; 511 first rodless cavities; 512 first rod chambers; 513 first oil cylinder pistons;
52 second oil cylinders; 521 second rodless cavities; 522 second rod chambers; 523 second oil cylinder pistons;
53 carry cylinder; 531 first medium chambeies; 532 second medium chambeies; 533 piston of conveying cylinder;
54 piston rods;
55 selector valves;
61 medium delivery outlets; 62 medium boxes; 63 one-way valves; 64 detecting switches;
A1 the first valve position; A2 the second valve position;
B1 the first commutation position; B2 the second commutation position.
Embodiment
Core of the present invention is for a kind of pumping system is provided, and the structural design of this pumping system can improve the continuity of medium pumping on the one hand, the generation of the phenomenon that prevents from stopping; Pressure and the flow that can be conducive on the other hand to realize positive revesal medium delivery outlet equate.In addition, another core of the present invention is for providing a kind of controlling method of above-mentioned pumping system.Moreover another core of the present invention is for providing a kind of fire-protection equipment that comprises above-mentioned pumping system.
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 is the structural representation of pumping system in the first embodiment of the present invention.
In basic technology scheme, pumping system provided by the present invention, as shown in Figure 1, draws together plunger pump, plunger pump comprises oil cylinder, carries cylinder 53 and piston rod 54, piston rod 54 respectively be located at oil cylinder piston in oil cylinder and be located at the piston of conveying cylinder 533 of carrying in cylinder 53 and be connected.In addition, as shown in Figure 1, carry the first medium chamber 531 of cylinder 53 and second medium chamber 532 by himself to medium delivery outlet 61 one-way conductions, and the two is all communicated with medium box 62, and medium box 62 is all to the two one-way conduction, and particularly, above-mentioned one-way conduction can be realized by one-way valve 63; Oil cylinder is connected with oil pump 2 by selector valve 55, to make plunger pump commutation.
On the basis of above-mentioned basic technology scheme, the quantity of the plunger pump of pumping system provided by the present invention is at least two, and the quantity of establishing this plunger pump is n; Each plunger pump alternate turns commutation, in the time that a plunger pump arrives commutation position, have a plunger pump and started to carry out pumped medium operation, now all pilot processs in pumped medium operation of other residue plunger pumps, are carrying out the operation of pumped medium to make arbitrary moment all have n-1 plunger pump.When work, when a plunger pump has started commutation while stopping medium pumping, have a plunger pump and started to carry out the operation of pumped medium, thereby realized the continuity of medium pumping.In addition, arbitrary moment all has n-1 plunger pump and is carrying out the operation of pumped medium, thereby also can guarantee flow and the pressure of medium pumping.
In addition, in the present invention, in any plunger pump, the quantity of oil cylinder is two, is respectively the first oil cylinder 51 and the second oil cylinder 52, and the two is located at respectively the both sides of carrying cylinder 53; The middle part of piston rod 54 connects piston of conveying cylinder 533, its two ends are connected with the second oil cylinder piston 523 of being located at the first oil cylinder piston 513 of the first oil cylinder 51 and be located in the second oil cylinder 52 respectively, so that along with piston rod 54 moves, pumped medium operation hockets for first medium chamber 531 and second medium chamber 532.In the time that plunger pump carries out forward stroke motion, rodless cavity oil-feed that can the first oil cylinder 51, in the time that plunger pump carries out reverse stroke motion, rodless cavity oil-feed that can the second oil cylinder 52, under the first oil cylinder 51 prerequisite identical with the second oil cylinder 52 specifications, pressure and flow that this kind of structural design can be conducive to realize positive revesal medium delivery outlet 61 equate.
It should be noted that, in above-mentioned basic technology scheme, n can equal 2, that is the quantity of plunger pump can be two, thereby obtains the first embodiment of the present invention.Particularly, in this first embodiment, as shown in Figure 1, the quantity of plunger pump is two, is respectively the first plunger pump 4 and the second plunger pump 5; In the first plunger pump 4 and the second plunger pump 5, when one arrives commutation position, another one has started to carry out the operation of pumped medium.
Certainly, in above-mentioned basic technology scheme, n can equal 3, that is the quantity of plunger pump can be 3, thereby obtains the second embodiment of the present invention, for this second embodiment's working procedure, will discuss in detail later.
As shown in Figure 1, in the first embodiment, in the first plunger pump 4 and the second plunger pump 5, the structural design of two plunger pumps is identical, and any plunger pump includes carries cylinder 53, the first oil cylinder 51, the second oil cylinder 52 and selector valve 55; The cavity of the first oil cylinder 51 is divided into the first rodless cavity 511 and the first rod chamber 512, the second oil cylinders 52 cavity by its first oil cylinder piston 513 is divided into the second rodless cavity 521 and the second rod chamber 522 by its second oil cylinder piston 523; Carrying in cylinder 53 is first medium chamber 531 away from the cavity of the first oil cylinder 51, is second medium chamber 532 near the cavity of the first oil cylinder 51; In piston rod 54, be connected with piston of conveying cylinder 533, its two ends connect respectively the first oil cylinder piston 513 and the second oil cylinder piston 523.
In addition, as shown in Figure 1, two selector valves 55 are all connected with fuel tank 1 by oil pump 2, and are also provided with relief valve 3 on oil circuit, to guarantee oil circuit safety.As shown in Figure 1, two selector valves 55 can share an oil pump 2, and certainly, two selector valves 55 also can use respectively an oil pump, and the present invention is not restricted this.
In addition, as shown in Figure 1, in the first plunger pump 4 and the second plunger pump 5, the selector valve 55 of any one is equipped with and makes the first valve position a1 of the first rodless cavity 511 oil-feeds the second rodless cavity 521 oil returns and make the second rodless cavity 521 oil-feeds and the second valve position a2 of the first rodless cavity 511 oil returns; So that the first rodless cavity 511 oil-feeds, the operation of pumped medium is carried out in first medium chamber 531; The second rodless cavity 521 oil-feeds, the operation of pumped medium is carried out in second medium chamber 532.
On the basis of said structure, can make restriction to the controlling method of pumping system.Particularly, please refer to Fig. 5, Fig. 5 is the FB(flow block) of the controlling method of pumping system in an embodiment of the present invention.
In this controlling method, as shown in Figure 1, in any plunger pump, the first oil cylinder 51 is defined as the first commutation position b1 near the one end of carrying cylinder 53, and it is defined as the second commutation position b2 away from the one end of carrying cylinder 53; On this basis, the controlling method of pumping system comprises the steps:
S11: make the first rodless cavity 511 oil-feeds of the first plunger pump 4; Particularly, as shown in Figure 1, make the DT1 of the selector valve 55 of the first plunger pump 4 obtain electric, make this selector valve 55 in the first valve position a1, thereby make the first rodless cavity 511 oil-feeds of the first plunger pump 4, the second rodless cavity 521 oil returns, the first oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and the second oil cylinder piston 523 move right, in the first plunger pump 4, carry the first medium chamber 531 of cylinder 53 to carry out medium pumping operation, second medium chamber 532 is entered by medium box 62 to carry out Absorption of Medium operation.
S12: until the first oil cylinder piston 513 of the first plunger pump 4 while arriving the first commutation position b1, makes the first rodless cavity 511 of the second plunger pump 5 start oil-feed; Particularly, as shown in Figure 1, make the DT3 of the selector valve 55 of the second plunger pump 5 obtain electric, make this selector valve 55 in the first valve position a1, thereby make the first rodless cavity 511 oil-feeds of the second plunger pump 5, the second rodless cavity 521 oil returns, the first oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and the second oil cylinder piston 523 move right, in the second plunger pump 5, carry the first medium chamber 531 of cylinder 53 to carry out medium pumping operation, second medium chamber 532 is entered by medium box 62 to carry out Absorption of Medium operation.
S13: until the first oil cylinder piston 513 of this second plunger pump 5 while arriving the first commutation position b1, makes the second rodless cavity 521 oil-feeds of the first plunger pump 4; Particularly, as shown in Figure 1, make the second rodless cavity 521 oil-feeds of the first plunger pump 4; As shown in Figure 1, make the DT2 of the selector valve 55 of the first plunger pump 4 obtain electric, make this selector valve 55 in the second valve position a2, thereby make the second rodless cavity 521 oil-feeds of the first plunger pump 4, the first rodless cavity 511 oil returns, the first oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and the second oil cylinder piston 523, to left movement, carry the second medium chamber 532 of cylinder 53 to carry out medium pumping operation in the first plunger pump 4, first medium chamber 531 is entered by medium box 62 to carry out Absorption of Medium operation.
S14: until the first oil cylinder piston 513 of this first plunger pump 4 while arriving the second commutation position b2, makes the second rodless cavity 521 oil-feeds of the second plunger pump 5; Particularly, as shown in Figure 1, make the DT4 of the selector valve 55 of the second plunger pump 5 obtain electric, make this selector valve 55 in the second valve position a2, thereby make the second rodless cavity 521 oil-feeds of the second plunger pump 5, the first rodless cavity 511 oil returns, the first oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and the second oil cylinder piston 523 are to left movement, in the second plunger pump 5, carry the second medium chamber 532 of cylinder 53 to carry out medium pumping operation, first medium chamber 531 is entered by medium box 62 to carry out Absorption of Medium operation.
S15: until the first oil cylinder piston 513 of this second plunger pump 5 is while arriving the second commutation position b2, then turns to and carry out above-mentioned steps S11.
Further, in above-mentioned controlling method, can add after detecting switch 64, the first oil cylinder piston 513 detection trigger switches 64 at the first commutation position b1 and the second commutation position b2, make accordingly the first rodless cavity 511 or the second rodless cavity 521 oil-feeds.Particularly, signal is passed to selector valve 55 by detecting switch 64, makes changing between the first valve position a1 or the second valve position a2 of its, and then make accordingly the first rodless cavity 511 or the second rodless cavity 521 oil-feeds in two plunger pumps.
In above-mentioned pumping system, can make further improvement.Particularly, please refer to Fig. 2, Fig. 2 is that the structural representation after further improvement is made on the basis of pumping system in Fig. 1.
As shown in Figure 2, in the first plunger pump 4 and the second plunger pump 5, the selector valve 55 of any one is equipped with the first valve position a1 that makes the first rodless cavity 511 and the second rod chamber 522 oil-feeds simultaneously, also the second rodless cavity 521 and the first rod chamber 512 oil returns simultaneously, and makes the second valve position a2 of the second rodless cavity 521 and the first rod chamber 512 oil-feeds simultaneously, also the first rodless cavity 511 and the second rod chamber 522 oil returns simultaneously; So that the first rodless cavity 511 and the second rod chamber 522 oil-feeds simultaneously, the operation of pumped medium is carried out in first medium chamber 531; The second rodless cavity 521 and the first rod chamber 512 oil-feeds simultaneously, the operation of pumped medium is carried out in second medium chamber 532.This kind of structural design makes the first rodless cavity 511 and the second rod chamber 522 oil-feeds simultaneously, or second rodless cavity 521 and the oil-feeds simultaneously of the first rod chamber 512, thereby can increase the pressure of medium pumping, thereby can more be conducive to the fire fighting and rescue of high level or skyscraper.
In addition, lower in building height, when requirement is not too high to pumping pressure, can also make further change.Particularly, please refer to Fig. 3, Fig. 3 is that the structural representation after another kind of change has been made on the basis of pumping system in Fig. 1.
As shown in Figure 3, in the first plunger pump 4 and the second plunger pump 5, the selector valve 55 of any one is equipped with the first valve position a1 that makes the second rod chamber 522 oil-feeds the first rod chamber 512 oil returns, and makes the second valve position a2 of the first rod chamber 512 oil-feeds the second rod chamber 522 oil returns; So that the second rod chamber 522 oil-feeds, the operation of pumped medium is carried out in first medium chamber 531; The first rod chamber 512 oil-feeds, the operation of pumped medium is carried out in second medium chamber 532.This kind of structural design can obtain less pumping pressure, thereby adapts to the needs of low storied building fire extinguishing.
In addition, please refer to Fig. 4, Fig. 4 is the motion flow chart of three oil cylinders of pumping system in the second embodiment of the present invention.
As described above, in above-mentioned basic technology scheme, pumping system can comprise three plunger pumps, and the structural design of each plunger pump is identical with plunger pump structure in Fig. 1, Fig. 2 or Fig. 3.Three plunger pumps comprise respectively first oil cylinder, as described in Figure 4, are defined as respectively the first oil cylinder A, the first oil cylinder B and the first oil cylinder C.
It should be noted that, in three oil cylinders, the left side of piston is the first rodless cavity, and the right is the first rod chamber, the first rodless cavity oil-feed, and piston moves right, and medium pumping operation is carried out in first medium chamber; If piston is to left movement, mean the second rodless cavity oil-feed of the second oil cylinder of corresponding plunger pump, medium pumping operation is carried out in second medium chamber.
As shown in Figure 4, in the t1 moment, the piston in the first oil cylinder A moves right to middle of stroke, and now the piston of the first oil cylinder B has started to move right, now the piston in the first oil cylinder C remains static, and the plunger pump at the first oil cylinder A and the first oil cylinder B place is carried out medium pumping operation;
In the t2 moment, piston in the first oil cylinder A moves right to commutation position and commutates, now the piston in the first oil cylinder B moves right to middle of stroke, and now the piston in the first oil cylinder C has started to move right, and the plunger pump at the first oil cylinder B and the first oil cylinder C place is carried out medium pumping operation;
In the t3 moment, piston in the first oil cylinder A has commutated and has started to left movement, now the piston in the first oil cylinder B moves right to commutation position and commutates, now the piston in the first oil cylinder C moves right to middle of stroke, and the plunger pump at the first oil cylinder A and the first oil cylinder C place is carried out medium pumping operation;
In the t4 moment, piston in the first oil cylinder A moves to middle of stroke left, now the piston in the first oil cylinder B has commutated and has started to left movement, now the piston in the first oil cylinder C moves right to commutation position commutation, and the plunger pump at the first oil cylinder A and the first oil cylinder B place is carried out medium pumping operation;
In the t5 moment, piston in the first oil cylinder A moves to commutation position left, now the piston in the first oil cylinder B moves to middle of stroke left, and now the piston in the first oil cylinder C has commutated and started left, and the plunger pump at the first oil cylinder B and the first oil cylinder C place is carried out medium pumping operation;
In said process, so move in circles, make three oil cylinder alternate turns commutations, guarantee the continuity of pumping system medium pumping.
Certainly, in pumping system of the present invention, in the time that the quantity of plunger pump is four, be different from and on above-mentioned oil cylinder stroke, set three positions, can be provided with four positions at the stroke of an oil cylinder, that is remove outside the commutation position at two ends, add two middle of stroke positions in centre, other working procedure, with above, do not repeat them here.Certainly, in the time that the quantity of plunger pump is greater than four, analogize in like manner, also repeat no more herein.
In addition, the present invention also provides a kind of fire-protection equipment, and this fire-protection equipment comprises the pumping system in above-mentioned any technological scheme.Other parts of fire-protection equipment, can, with reference to prior art, no longer launch herein.
Above pumping system provided by the present invention and controlling method thereof, fire-protection equipment are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.

Claims (9)

1. a pumping system, comprise plunger pump, described plunger pump comprises oil cylinder, carries cylinder (53) and piston rod (54), described piston rod (54) respectively be located at the oil cylinder piston in described oil cylinder and be connected with the piston of conveying cylinder (533) of being located in described conveying cylinder (53);
The first medium chamber (531) of described conveying cylinder (53) and second medium chamber (532) are by himself to medium delivery outlet (61) one-way conduction, and the two is all communicated with medium box (62), and described medium box (62) is all to the two one-way conduction; Described oil cylinder is connected with oil pump (2) by selector valve (55), to make described plunger pump commutation;
It is characterized in that, the quantity of described plunger pump is at least two, and the quantity of establishing this plunger pump is n; Each described plunger pump alternate turns commutation, in the time that a plunger pump arrives commutation position, have a plunger pump and started to carry out pumped medium operation, now all pilot processs in pumped medium operation of other residue plunger pumps, are carrying out the operation of pumped medium to make arbitrary moment all have n-1 plunger pump;
And the quantity of oil cylinder is two described in any plunger pump, be respectively the first oil cylinder (51) and the second oil cylinder (52), and the two is located at respectively the both sides of described conveying cylinder (53); The middle part of described piston rod (54) connects described piston of conveying cylinder (533), its two ends are connected with the second oil cylinder piston (523) of being located at first oil cylinder piston (513) of described the first oil cylinder (51) and be located in described the second oil cylinder (52) respectively, so that along with described piston rod (54) motion, pumped medium operation hockets for described first medium chamber (531) and described second medium chamber (532).
2. pumping system as claimed in claim 1, is characterized in that, the quantity of described plunger pump is two, is respectively the first plunger pump (4) and the second plunger pump (5); In described the first plunger pump (4) and described the second plunger pump (5), when one arrives commutation position, another one has started to carry out the operation of pumped medium.
3. pumping system as claimed in claim 2, it is characterized in that, in described the first plunger pump (4) and described the second plunger pump (5), any plunger pump includes described conveying cylinder (53), described the first oil cylinder (51), described the second oil cylinder (52) and described selector valve (55); The cavity of described the first oil cylinder (51) is divided into the first rodless cavity (511) and the first rod chamber (512) by its first oil cylinder piston (513), and the cavity of described the second oil cylinder (52) is divided into the second rodless cavity (521) and the second rod chamber (522) by its second oil cylinder piston (523);
In described conveying cylinder (53), being described first medium chamber (531) away from the cavity of described the first oil cylinder (51), is described second medium chamber (532) near the cavity of described the first oil cylinder (51).
4. pumping system as claimed in claim 3, it is characterized in that, in described the first plunger pump (4) and described the second plunger pump (5), the selector valve (55) of any one is equipped with and makes first valve position (a1) of the first rodless cavity (511) oil-feed the second rodless cavity (521) oil return and make the second rodless cavity (521) oil-feed and second valve position (a2) of the first rodless cavity (511) oil return;
So that described the first rodless cavity (511) oil-feed, the operation of pumped medium is carried out in described first medium chamber (531); Described the second rodless cavity (521) oil-feed, the operation of pumped medium is carried out in described second medium chamber (532).
5. pumping system as claimed in claim 3, it is characterized in that, in described the first plunger pump (4) and described the second plunger pump (5), the selector valve (55) of any one is equipped with the first valve position (a1) that makes the first rodless cavity (511) and the second rod chamber (522) oil-feed simultaneously, also the second rodless cavity (521) and the first rod chamber (512) oil return simultaneously, and makes second valve position (a2) of the second rodless cavity (521) and the first rod chamber (512) oil-feed simultaneously, also the first rodless cavity (511) and the second rod chamber (522) oil return simultaneously;
So that the oil-feed simultaneously of the first rodless cavity (511) and the second rod chamber (522), the operation of pumped medium is carried out in described first medium chamber (531); The oil-feed simultaneously of the second rodless cavity (521) and the first rod chamber (512), the operation of pumped medium is carried out in described second medium chamber (532).
6. pumping system as claimed in claim 3, it is characterized in that, in described the first plunger pump (4) and described the second plunger pump (5), the selector valve (55) of any one is equipped with the first valve position (a1) that makes the second rod chamber (522) oil-feed the first rod chamber (512) oil return, and makes second valve position (a2) of the first rod chamber (512) oil-feed the second rod chamber (522) oil return;
So that the second rod chamber (522) oil-feed, the operation of pumped medium is carried out in described first medium chamber (531); The first rod chamber (512) oil-feed, the operation of pumped medium is carried out in described second medium chamber (532).
7. the controlling method of pumping system as claimed in claim 4, it is characterized in that, in any plunger pump, described the first oil cylinder (51) is defined as the first commutation position (b1) near one end of described conveying cylinder (53), and its one end away from described conveying cylinder (53) is defined as the second commutation position (b2); On this basis, the controlling method of described pumping system comprises the steps:
S11: make the first rodless cavity (511) oil-feed of the first plunger pump (4);
S12: until first oil cylinder piston (513) of the first plunger pump (4) arrives the first commutation position when (b1), make first rodless cavity (511) of the second plunger pump (5) start oil-feed;
S13: until first oil cylinder piston (513) of this second plunger pump (5) arrives the first commutation position when (b1), make the second rodless cavity (521) oil-feed of the first plunger pump (4);
S14: until first oil cylinder piston (513) of this first plunger pump (4) arrives the second commutation position when (b2), make the second rodless cavity (521) oil-feed of the second plunger pump (5);
S15: until first oil cylinder piston (513) of this second plunger pump (5) arrives the second commutation position when (b2), then turn to and carry out above-mentioned steps S11.
8. the controlling method of pumping system as claimed in claim 7, it is characterized in that, add detecting switch (64) at described the first commutation position (b1) and described the second commutation position (b2), described the first oil cylinder piston (513) triggers after described detecting switch (64), makes accordingly described the first rodless cavity (511) or described the second rodless cavity (521) oil-feed.
9. a fire-protection equipment, comprises pumping system; It is characterized in that, described pumping system is the pumping system described in claim 1 to 6 any one.
CN201110348201.7A 2011-11-07 2011-11-07 Pumping system, control method thereof, and fire fighting equipment Expired - Fee Related CN102536725B (en)

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CN105986982A (en) * 2015-02-13 2016-10-05 彭道琪 Pressure fluid driven reciprocating pump
CN105986981A (en) * 2015-02-13 2016-10-05 彭道琪 Pressure fluid driven reciprocating pump
CN106468252A (en) * 2016-10-25 2017-03-01 舟山梅朋水处理有限公司 A kind of equipment of liquid transformation transmission and system
CN107387360B (en) * 2017-06-15 2020-12-22 三一汽车制造有限公司 Plunger pump water supply system and control method thereof
CN108302031A (en) * 2017-10-06 2018-07-20 马鞍山虹迈专业化设计有限公司 A kind of current stabilization hydraulic pump and a kind of current stabilization Transmission system using the current stabilization hydraulic pump

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