CN102536725A - Pumping system, control method thereof, and fire fighting equipment - Google Patents
Pumping system, control method thereof, and fire fighting equipment Download PDFInfo
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- CN102536725A CN102536725A CN2011103482017A CN201110348201A CN102536725A CN 102536725 A CN102536725 A CN 102536725A CN 2011103482017 A CN2011103482017 A CN 2011103482017A CN 201110348201 A CN201110348201 A CN 201110348201A CN 102536725 A CN102536725 A CN 102536725A
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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
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 rapid economy development, tall building is rised sheer from level ground in succession, and the trend of competitively fighting for mastery is more and more arranged like rain the back spring bamboo.Yet, together be tall building or the skyscraper fire accident that takes place again and again, thereby tall building or skyscraper fire fighting and rescue just become right key subjects of modern society's demand side inevitably.
In the prior art, fire service pump generally comprises two types, and a kind of is centrifugal type of water pump, and the restriction but this kind water pump is stressed can't be satisfied high-rise or high-rise fire-fighting fire extinguishing demand; Another kind is common plunger class water pump, though this kind water pump can satisfy the pressure requirement, this kind water pump receives flow restriction, also can't satisfy high-rise or high-rise fire-fighting fire extinguishing demand.
In the prior art; Also have a kind of biserial plunger type water pump,, also can satisfy traffic requirement though this biserial plunger type water pump can satisfy the pressure requirement; But owing to receive 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, it is also inconsistent to carry cylinder to be transported to the pressure and the flow of water outlet; That is oil cylinder is when forward stroke; Water outlet is pressure and flow, and oil cylinder is when reverse stroke, and water outlet is another pressure and flow.
In view of this, how pumping system of the prior art is made improvement, thereby on the one hand can improve the continuity of medium pumping, the generation of the phenomenon that prevents to stop; Can help on the other hand realizing that the pressure of positive revesal medium delivery outlet and flow equate, be the problem that those skilled in the art need solution badly.
Summary of the invention
The technical problem that the present invention will solve is for providing a kind of pumping system, 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 to stop; Can help on the other hand realizing that the pressure of positive revesal medium delivery outlet and flow equate.In addition, another technical problem that will solve of the present invention is the controlling method that a kind of above-mentioned pumping system is provided.Moreover another technical problem that will solve of the present invention is that a kind of fire-protection equipment that comprises above-mentioned pumping system is provided.
For solving the problems of the technologies described above; The present invention provides a kind of pumping system; Comprise plunger pump, said plunger pump comprises oil cylinder, carries cylinder and piston rod, said piston rod respectively be located at said oil cylinder in oil cylinder piston and be connected with piston of conveying cylinder in being located at said conveying cylinder;
To the unidirectional conducting of medium delivery outlet, and the two all is communicated with medium box by himself for first media cavity of said conveying cylinder and second media cavity, and said medium box is all to the two unidirectional conducting; Said oil cylinder is connected with oil pump through selector valve, so that make said plunger pump switching-over;
The quantity of said plunger pump is at least two, and the quantity of establishing this plunger pump is n; Each said plunger pump alternate turns switching-over; When a plunger pump arrives commutation position; Then have a plunger pump and begun to carry out the pumped medium operation; This moment, other residue plunger pumps all were in the pilot process of pumped medium operation, so that make arbitrary moment all have the operation that n-1 plunger pump carrying out pumped medium;
And the quantity of oil cylinder is two described in any plunger pump, be respectively first oil cylinder and second oil cylinder, and the two is located at the both sides of said conveying cylinder respectively; The middle part of said piston rod connects said piston of conveying cylinder; Its two ends are connected with first oil cylinder piston of being located at said first oil cylinder and second oil cylinder piston be located in said second oil cylinder respectively; So that along with said piston rod movement, the hocket pumped medium operation of said first media cavity and said second media cavity.
Preferably, the quantity of said plunger pump is two, is respectively first plunger pump and second plunger pump; In said first plunger pump and said second plunger pump, one when arriving commutation position, and another person has begun to carry out the operation of pumped medium.
Preferably, in said first plunger pump and said second plunger pump, any plunger pump includes said conveying cylinder, said first oil cylinder, said second oil cylinder and said selector valve; The cavity of said first oil cylinder is divided into first rodless cavity and first rod chamber by its first oil cylinder piston, and the cavity of said second oil cylinder is divided into second rodless cavity and second rod chamber by its second oil cylinder piston;
Cavity away from said first oil cylinder in the said conveying cylinder is said first media cavity, is said second media cavity near the cavity of said first oil cylinder.
Preferably, the selector valve of any one is equipped with first valve position that makes win the rodless cavity oil-feed and the second rodless cavity oil return and second valve position that makes the second rodless cavity oil-feed and the first rodless cavity oil return in said first plunger pump and said second plunger pump;
So that the said first rodless cavity oil-feed, said first media cavity is carried out the operation of pumped medium; The said second rodless cavity oil-feed, said second media cavity is carried out the operation of pumped medium.
Preferably; The selector valve of any one is equipped with and makes rodless cavity and second rod chamber oil-feed simultaneously of winning, and first valve position of second rodless cavity and the oil return simultaneously of first rod chamber in said first plunger pump and said second plunger pump, and makes second rodless cavity and the oil-feed simultaneously of first rod chamber, and second valve position of first rodless cavity and the oil return simultaneously of second rod chamber;
So that the oil-feed simultaneously of first rodless cavity and second rod chamber, said first media cavity is carried out the operation of pumped medium; The oil-feed simultaneously of second rodless cavity and first rod chamber, said second media cavity is carried out the operation of pumped medium.
Preferably, the selector valve of any one is equipped with and makes first valve position of the second rod chamber oil-feed and the first rod chamber oil return in said first plunger pump and said second plunger pump, and makes second valve position of win the rod chamber oil-feed and the second rod chamber oil return;
So that the second rod chamber oil-feed, said first media cavity is carried out the operation of pumped medium; The first rod chamber oil-feed, said second media cavity is carried out the operation of pumped medium.
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; Said first oil cylinder is defined as first commutation position near an end of said conveying cylinder, and its end away from said conveying cylinder is defined as second commutation position; On this basis, the controlling method of said pumping system comprises the steps:
S11: make the first rodless cavity oil-feed of the plunger pump of winning;
S12: when first oil cylinder piston of first plunger pump arrives first commutation position, make first rodless cavity of second plunger pump begin oil-feed;
S13: when first oil cylinder piston of this second plunger pump arrives first commutation position, make the second rodless cavity oil-feed of the plunger pump of winning;
S14: when first oil cylinder piston of this first plunger pump arrives second commutation position, make the second rodless cavity oil-feed of second plunger pump;
S15: when first oil cylinder piston of this second plunger pump arrives second commutation position, turn to again and carry out above-mentioned steps S11.
Preferably, add detecting switch, after said first oil cylinder piston triggers said detecting switch, make said first rodless cavity or the said second rodless cavity oil-feed accordingly at said first commutation position and said second commutation position.
Moreover for solving the problems of the technologies described above, the present invention also provides a kind of fire-protection equipment, comprises pumping system; Said pumping system is above-mentioned each described pumping system.
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 said plunger pump alternate turns switching-over; When a plunger pump arrives commutation position; Then have a plunger pump and begun to carry out the pumped medium operation; This moment, other residue plunger pumps all were in the pilot process of pumped medium operation, so that make arbitrary moment all have the operation that n-1 plunger pump carrying out pumped medium.During work,, then have a plunger pump and begun to carry out the operation of pumped medium, thereby realized the continuity of medium pumping when a plunger pump has begun switching-over when stopping the medium pumping.In addition, arbitrary moment all has the operation that n-1 plunger pump carrying out pumped medium, thereby also can guarantee the flow and the pressure of medium pumping.
In addition, in the present invention, the quantity of oil cylinder is two described in any plunger pump, be respectively first oil cylinder and second oil cylinder, and the two is located at the both sides of said conveying cylinder respectively; The middle part of said piston rod connects said piston of conveying cylinder; Its two ends are connected with first oil cylinder piston of being located at said first oil cylinder and second oil cylinder piston be located in said second oil cylinder respectively; So that along with said piston rod movement, the hocket pumped medium operation of said first media cavity and said second media cavity.When plunger pump carries out the forward stroke motion; Rodless cavity oil-feed that can first oil cylinder; When plunger pump carries out the reverse stroke motion; Rodless cavity oil-feed that can second oil cylinder, under first oil cylinder prerequisite identical with the second oil cylinder specification, this kind structural design can help realizing that the pressure of positive revesal medium delivery outlet and flow 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 to stop; Can help on the other hand realizing that the pressure of positive revesal medium delivery outlet and flow 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, repeats no more at this.
Description of drawings
Fig. 1 is the structural representation of pumping system among first kind of embodiment of the present invention;
Fig. 2 makes the structural representation after the further improvement for the basis of pumping system in Fig. 1;
Fig. 3 has made the structural representation after the another kind of change for the basis of pumping system in Fig. 1;
Fig. 4 is the structural representation of pumping system among second kind of 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, the corresponding relation between reference character and the component names is among Fig. 1 to Fig. 5:
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 media cavity; 532 second media cavity; 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 first valve position; A2 second valve position;
B1 first commutation position; B2 second commutation position.
Embodiment
Core of the present invention is for providing a kind of pumping system, 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 to stop; Can help on the other hand realizing that the pressure of positive revesal medium delivery outlet and flow equate.In addition, another core of the present invention is the controlling method that a kind of above-mentioned pumping system is provided.Moreover another core of the present invention is that a kind of fire-protection equipment that comprises above-mentioned pumping system is provided.
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 1, Fig. 1 is the structural representation of pumping system among first kind of embodiment of the present invention.
In the basic technology scheme; Pumping system provided by the present invention, as shown in Figure 1, draw together plunger pump; Plunger pump comprises oil cylinder, carries cylinder 53 and piston rod 54, piston rod 54 respectively be located at oil cylinder in oil cylinder piston and be connected with piston of conveying cylinder 533 in being located at conveying cylinder 53.In addition, as shown in Figure 1, first media cavity 531 and second media cavity 532 of carrying cylinder 53 by himself to the 61 unidirectional conductings of medium delivery outlet; And the two all is communicated with medium box 62; And medium box 62 is all to the two unidirectional conducting, and particularly, above-mentioned unidirectional conducting can realize through one-way valve 63; Oil cylinder is connected with oil pump 2 through selector valve 55, so that make the plunger pump switching-over.
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 switching-over; When a plunger pump arrives commutation position; Then have a plunger pump and begun to carry out the pumped medium operation; This moment, other residue plunger pumps all were in the pilot process of pumped medium operation, so that make arbitrary moment all have the operation that n-1 plunger pump carrying out pumped medium.During work,, then have a plunger pump and begun to carry out the operation of pumped medium, thereby realized the continuity of medium pumping when a plunger pump has begun switching-over when stopping the medium pumping.In addition, arbitrary moment all has the operation that n-1 plunger pump carrying out pumped medium, thereby also can guarantee the flow and the pressure of medium pumping.
In addition, in the present invention, the quantity of oil cylinder is two in any plunger pump, is respectively first oil cylinder 51 and second oil cylinder 52, and the two is located at the both sides of carrying cylinder 53 respectively; The middle part of piston rod 54 connects piston of conveying cylinder 533; Its two ends are connected with first oil cylinder piston 513 of being located at first oil cylinder 51 and second oil cylinder piston 523 be located in second oil cylinder 52 respectively; So that along with piston rod 54 motion, first media cavity 531 and second media cavity 532 pumped medium that hockets is operated.When plunger pump carries out the forward stroke motion; Rodless cavity oil-feed that can first oil cylinder 51; When plunger pump carries out the reverse stroke motion; Rodless cavity oil-feed that can second oil cylinder 52, under first oil cylinder 51 prerequisite identical with second oil cylinder, 52 specifications, this kind structural design can help realizing that the pressure of positive revesal medium delivery outlet 61 and flow equate.
Need to prove that in above-mentioned basic technology scheme, n can equal 2, that is the quantity of plunger pump can be two, thereby obtain first kind of embodiment of the present invention.Particularly, in this first kind of embodiment, as shown in Figure 1, the quantity of plunger pump is two, is respectively first plunger pump 4 and second plunger pump 5; In first plunger pump 4 and second plunger pump 5, one when arriving commutation position, and another person has begun 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 second kind of embodiment of the present invention, for this second kind of embodiment's working procedure, will discuss in detail at the back literary composition.
As shown in Figure 1, in first kind of embodiment, in first plunger pump 4 and second plunger pump 5, the structural design of two plunger pumps is identical, and any plunger pump includes carries cylinder 53, first oil cylinder 51, second oil cylinder 52 and selector valve 55; The cavity of first oil cylinder 51 is divided into second rodless cavity 521 and second rod chamber 522 by the cavity that its first oil cylinder piston 513 is divided into first rodless cavity 511 and first rod chamber, 512, the second oil cylinders 52 by its second oil cylinder piston 523; Carrying that the cavity away from first oil cylinder 51 is first media cavity 531 in the cylinder 53, is second media cavity 532 near the cavity of first oil cylinder 51; Be connected with piston of conveying cylinder 533 in the piston rod 54, its two ends connect first oil cylinder piston 513 and second oil cylinder piston 523 respectively.
In addition, as shown in Figure 1, two selector valves 55 all are connected with fuel tank 1 through oil pump 2, and also are provided with relief valve 3 on the oil circuit, to guarantee oil circuit safety.As shown in Figure 1, two selector valves 55 can a shared oil pump 2, and certainly, two selector valves 55 also can use an oil pump respectively, and the present invention does not limit this.
In addition; As shown in Figure 1, the selector valve 55 of any one is equipped with first valve position a1 that makes win rodless cavity 511 oil-feeds and 521 oil returns of second rodless cavity and the second valve position a2 that makes 521 oil-feeds of second rodless cavity and 511 oil returns of first rodless cavity in first plunger pump 4 and second plunger pump 5; So that 511 oil-feeds of first rodless cavity, first media cavity 531 is carried out the operation of pumped medium; 521 oil-feeds of second rodless cavity, second media cavity 532 is carried out the operation of pumped medium.
On the basis of said structure, can make qualification 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, first oil cylinder 51 is defined as the first commutation position b1 near an end of carrying cylinder 53, and it is defined as the second commutation position b2 away from an end of carrying cylinder 53; On this basis, the controlling method of pumping system comprises the steps:
S11: make first rodless cavity, 511 oil-feeds of the plunger pump 4 of winning; Particularly; As shown in Figure 1; It is electric that the DT1 of the selector valve 55 of the plunger pump 4 of winning is got, and makes this selector valve 55 be in the first valve position a1, thereby make first rodless cavity, 511 oil-feeds of the plunger pump 4 of winning; 521 oil returns of second rodless cavity; First oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and second oil cylinder piston 523 move right, and then carry first media cavity 531 of cylinder 53 to carry out the medium pumping operation in first plunger pump 4, and second media cavity 532 is advanced to carry out medium through medium box 62 and absorb operation.
S12: when first oil cylinder piston 513 of first plunger pump 4 arrives the first commutation position b1, make first rodless cavity 511 of second plunger pump 5 begin oil-feed; Particularly; As shown in Figure 1; It is electric to make that the DT3 of selector valve 55 of second plunger pump 5 gets, and makes this selector valve 55 be in the first valve position a1, thereby makes first rodless cavity, 511 oil-feeds of second plunger pump 5; 521 oil returns of second rodless cavity; First oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and second oil cylinder piston 523 move right, and then carry first media cavity 531 of cylinder 53 to carry out the medium pumping operation in second plunger pump 5, and second media cavity 532 is advanced to carry out medium through medium box 62 and absorb operation.
S13: when first oil cylinder piston 513 of this second plunger pump 5 arrives the first commutation position b1, make second rodless cavity, 521 oil-feeds of the plunger pump 4 of winning; Particularly, as shown in Figure 1, make second rodless cavity, 521 oil-feeds of the plunger pump 4 of winning; As shown in Figure 1; It is electric that the DT2 of the selector valve 55 of the plunger pump 4 of winning is got, and makes this selector valve 55 be in the second valve position a2, thereby make second rodless cavity, 521 oil-feeds of the plunger pump 4 of winning; 511 oil returns of first rodless cavity; First oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and second oil cylinder piston 523 then carry second media cavity 532 of cylinder 53 to carry out the medium pumping operation to left movement in first plunger pump 4, first media cavity 531 is advanced to carry out medium through medium box 62 and absorb operation.
S14: when first oil cylinder piston 513 of this first plunger pump 4 arrives the second commutation position b2, make second rodless cavity, 521 oil-feeds of second plunger pump 5; Particularly; As shown in Figure 1; It is electric to make that the DT4 of selector valve 55 of second plunger pump 5 gets, and makes this selector valve 55 be in the second valve position a2, thereby makes second rodless cavity, 521 oil-feeds of second plunger pump 5; 511 oil returns of first rodless cavity; First oil cylinder piston 513, piston rod 54, piston of conveying cylinder 533 and second oil cylinder piston 523 then carry second media cavity 532 of cylinder 53 to carry out the medium pumping operation to left movement in second plunger pump 5, first media cavity 531 is advanced to carry out medium through medium box 62 and absorb operation.
S15: when first oil cylinder piston 513 of this second plunger pump 5 arrives the second commutation position b2, turn to again and carry out above-mentioned steps S11.
Further, in above-mentioned controlling method, after the first commutation position b1 and the second commutation position b2 can add detecting switch 64, the first oil cylinder pistons 513 detection trigger switches 64, make win rodless cavity 511 or 521 oil-feeds of second rodless cavity accordingly.Particularly, detecting switch 64 passes to selector valve 55 with signal, makes its between the first valve position a1 or the second valve position a2, change, and then makes first rodless cavity 511 or 521 oil-feeds of second rodless cavity in two plunger pumps accordingly.
In above-mentioned pumping system, can make further improvement.Particularly, please refer to Fig. 2, Fig. 2 makes the structural representation after the further improvement for the basis of pumping system in Fig. 1.
As shown in Figure 2; The selector valve 55 of any one is equipped with and makes win rodless cavity 511 and the oil-feeds simultaneously of second rod chamber 522, and the first valve position a1 of second rodless cavity 521 and 512 oil returns simultaneously of first rod chamber in first plunger pump 4 and second plunger pump 5, and makes second rodless cavity 521 and 512 oil-feeds simultaneously of first rod chamber, and the second valve position a2 of first rodless cavity 511 and the 522 while oil returns of second rod chamber; So that first rodless cavity 511 and 522 oil-feeds simultaneously of second rod chamber, first media cavity 531 is carried out the operation of pumped medium; Second rodless cavity 521 and 512 oil-feeds simultaneously of first rod chamber, second media cavity 532 is carried out the operation of pumped medium.This kind structural design makes win rodless cavity 511 and 522 oil-feeds simultaneously of second rod chamber; Or second rodless cavity 521 and the oil-feeds simultaneously of first rod chamber 512; Thereby can increase the pressure of medium pumping, thereby can more help 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 has made the structural representation after the another kind of change for the basis of pumping system in Fig. 1.
As shown in Figure 3; The selector valve 55 of any one is equipped with and makes the first valve position a1 of 522 oil-feeds of second rod chamber and 512 oil returns of first rod chamber in first plunger pump 4 and second plunger pump 5, and makes the second valve position a2 of win rod chamber 512 oil-feeds and 522 oil returns of second rod chamber; So that 522 oil-feeds of second rod chamber, first media cavity 531 is carried out the operation of pumped medium; 512 oil-feeds of first rod chamber, second media cavity 532 is carried out the operation of pumped medium.This kind 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 among second kind of embodiment of the present invention.
As indicated above, in above-mentioned basic technology scheme, pumping system can comprise three plunger pumps, and the plunger pump structure is identical among the structural design of each plunger pump and Fig. 1, Fig. 2 or Fig. 3.Three plunger pumps comprise one first oil cylinder respectively, and are of Fig. 4, are defined as the first oil cylinder A respectively, the first oil cylinder B and the first oil cylinder C.
Need to prove that in three oil cylinders, the left side of piston is first rodless cavity, the right is first rod chamber, the first rodless cavity oil-feed, and piston moves right, and first media cavity is carried out the medium pumping operation; To left movement, then mean the second rodless cavity oil-feed of second oil cylinder of pairing plunger pump like piston, then second media cavity is carried out the medium pumping operation.
As shown in Figure 4; At t1 constantly, the piston among the first oil cylinder A moves right to middle of stroke, and this moment, the piston of the first oil cylinder B began to move right; Piston among the first oil cylinder C remains static at this moment, and the plunger pump at the first oil cylinder A and first oil cylinder B place is carried out the medium pumping operation;
At t2 constantly; Piston among the first oil cylinder A moves right to commutation position and commutates; Piston among the first oil cylinder B moves right to middle of stroke at this moment, and the piston among the first oil cylinder C has begun to move right at this moment, and the plunger pump at the first oil cylinder B and first oil cylinder C place is carried out the medium pumping operation;
At t3 constantly; Piston switching-over among the first oil cylinder A is accomplished and has been begun to left movement; The piston among the first oil cylinder B moved right to commutation position and commutated this moment; Piston among the first oil cylinder C moves right to middle of stroke at this moment, and the plunger pump at the first oil cylinder A and first oil cylinder C place is carried out the medium pumping operation;
At t4 constantly; Piston among the first oil cylinder A moves to middle of stroke left; Piston switching-over among the first oil cylinder B is at this moment accomplished and has been begun to left movement; Piston among the first oil cylinder C moves right to the commutation position switching-over at this moment, and the plunger pump at the first oil cylinder A and first oil cylinder B place is carried out the medium pumping operation;
At t5 constantly; Piston among the first oil cylinder A moves to commutation position left; Piston among the first oil cylinder B moves to middle of stroke left at this moment, and the piston switching-over among the first oil cylinder C is at this moment accomplished and begun left, the plunger pump execution medium pumping operation at the first oil cylinder B and first oil cylinder C place;
In said process, so move in circles, make three oil cylinder alternate turns commutate, guarantee the continuity of pumping system medium pumping.
Certainly, in pumping system of the present invention, when 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 the centre; Other working procedure again repeat no more at this.Certainly, when the quantity of plunger pump during greater than four, analogize in like manner, this paper also repeats no more.
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 be with reference to existing technology, and this paper no longer launches.
More than pumping system provided by the present invention and controlling method thereof, fire-protection equipment have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 claim of the present invention.
Claims (9)
1. pumping system; Comprise plunger pump; Said plunger pump comprises oil cylinder, carries cylinder (53) and piston rod (54), said piston rod (54) respectively be located at said oil cylinder in oil cylinder piston and be connected with piston of conveying cylinder (533) in being located at said conveying cylinder (53);
To the unidirectional conducting of medium delivery outlet (61), and the two all is communicated with medium box (62) by himself for first media cavity (531) of said conveying cylinder (53) and second media cavity (532), and said medium box (62) is all to the two unidirectional conducting; Said oil cylinder is connected with oil pump (2) through selector valve (55), so that make said plunger pump switching-over;
It is characterized in that the quantity of said plunger pump is at least two, and the quantity of establishing this plunger pump is n; Each said plunger pump alternate turns switching-over; When a plunger pump arrives commutation position; Then have a plunger pump and begun to carry out the pumped medium operation; This moment, other residue plunger pumps all were in the pilot process of pumped medium operation, so that make arbitrary moment all have the operation that n-1 plunger pump carrying out pumped medium;
And the quantity of oil cylinder is two described in any plunger pump, be respectively first oil cylinder (51) and second oil cylinder (52), and the two is located at the both sides of said conveying cylinder (53) respectively; The middle part of said piston rod (54) connects said piston of conveying cylinder (533); Its two ends are connected with first oil cylinder piston (513) of being located at said first oil cylinder (51) and second oil cylinder piston (523) be located in said second oil cylinder (52) respectively; So that along with said piston rod (4) motion, said first media cavity (531) and said second media cavity (532) pumped medium that hockets is operated.
2. pumping system as claimed in claim 1 is characterized in that the quantity of said plunger pump is two, is respectively first plunger pump (4) and second plunger pump (5); In said first plunger pump (4) and said second plunger pump (5), one when arriving commutation position, and another person has begun to carry out the operation of pumped medium.
3. pumping system as claimed in claim 2; It is characterized in that; In said first plunger pump (4) and said second plunger pump (5), any plunger pump includes said conveying cylinder (53), said first oil cylinder (51), said second oil cylinder (52) and said selector valve (55); The cavity of said first oil cylinder (51) is divided into first rodless cavity (511) and first rod chamber (512) by its first oil cylinder piston (513), and the cavity of said second oil cylinder (52) is divided into second rodless cavity (521) and second rod chamber (522) by its second oil cylinder piston (523);
Cavity away from said first oil cylinder (51) in the said conveying cylinder (53) is said first media cavity (531), is said second media cavity (532) near the cavity of said first oil cylinder (51).
4. pumping system as claimed in claim 3; It is characterized in that second valve position (a2) that the selector valve (55) of any one is equipped with first valve position (a1) that makes the rodless cavity of winning (511) oil-feed and second rodless cavity (521) oil return and makes second rodless cavity (521) oil-feed and first rodless cavity (511) oil return in said first plunger pump (4) and said second plunger pump (5);
So that said first rodless cavity (511) oil-feed, said first media cavity (531) is carried out the operation of pumped medium; Said second rodless cavity (521) oil-feed, said second media cavity (532) is carried out the operation of pumped medium.
5. pumping system as claimed in claim 3; It is characterized in that; The selector valve (55) of any one is equipped with and makes the oil-feed simultaneously of the rodless cavity of winning (511) and second rod chamber (522), and first valve position (a1) of second rodless cavity (521) and first rod chamber (512) oil return simultaneously in said first plunger pump (4) and said second plunger pump (5), and makes second rodless cavity (521) and first rod chamber (512) oil-feed simultaneously, second valve position (a2) of first rodless cavity (511) and second rod chamber (522) while oil return also;
So that the oil-feed simultaneously of first rodless cavity (511) and second rod chamber (522), said first media cavity (531) is carried out the operation of pumped medium; The oil-feed simultaneously of second rodless cavity (521) and first rod chamber (512), said second media cavity (532) is carried out the operation of pumped medium.
6. pumping system as claimed in claim 3; It is characterized in that; The selector valve (55) of any one is equipped with and makes first valve position (a1) of second rod chamber (522) oil-feed and first rod chamber (512) oil return in said first plunger pump (4) and said second plunger pump (5), and makes second valve position (a2) of the rod chamber of winning (512) oil-feed and second rod chamber (522) oil return;
So that second rod chamber (522) oil-feed, said first media cavity (531) is carried out the operation of pumped medium; First rod chamber (512) oil-feed, said second media cavity (532) is carried out the operation of pumped medium.
7. the controlling method of pumping system as claimed in claim 4; It is characterized in that; In any plunger pump, said first oil cylinder (51) is defined as first commutation position (b1) near an end of said conveying cylinder (53), and its end away from said conveying cylinder (53) is defined as second commutation position (b2); On this basis, the controlling method of said pumping system comprises the steps:
S11: make first rodless cavity (511) oil-feed of the plunger pump of winning (4);
S12: when first oil cylinder piston (513) of first plunger pump (4) arrives first commutation position (b1), make first rodless cavity (511) of second plunger pump (5) begin oil-feed;
S13: when first oil cylinder piston (513) of this second plunger pump (5) arrives first commutation position (b1), make second rodless cavity (521) oil-feed of the plunger pump of winning (4);
S14: when first oil cylinder piston (513) of this first plunger pump (4) arrives second commutation position (b2), make second rodless cavity (521) oil-feed of second plunger pump (5);
S15: when first oil cylinder piston (513) of this second plunger pump (5) arrives second commutation position (b2), turn to again 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 said first commutation position (b1) and said second commutation position (b2); After said first oil cylinder piston (513) triggers said detecting switch (64), make said first rodless cavity (511) or said second rodless cavity (521) oil-feed accordingly.
9. a fire-protection equipment comprises pumping system; It is characterized in that said pumping system is each described pumping system of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110348201.7A CN102536725B (en) | 2011-11-07 | 2011-11-07 | Pumping system, control method thereof, and fire fighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110348201.7A CN102536725B (en) | 2011-11-07 | 2011-11-07 | Pumping system, control method thereof, and fire fighting equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN102536725A true CN102536725A (en) | 2012-07-04 |
| CN102536725B CN102536725B (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110348201.7A Expired - Fee Related CN102536725B (en) | 2011-11-07 | 2011-11-07 | Pumping system, control method thereof, and fire fighting equipment |
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| CN (1) | CN102536725B (en) |
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| CN102937074A (en) * | 2012-11-12 | 2013-02-20 | 三一重工股份有限公司 | Continuous material feeding system and control method and elevating platform fire truck thereof |
| 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 |
| CN107387360A (en) * | 2017-06-15 | 2017-11-24 | 三汽车制造有限公司 | A kind of plunger pump water system and its control method |
| WO2019068244A1 (en) * | 2017-10-06 | 2019-04-11 | 李利 | Steady flow hydraulic pump and steady flow transmission system using same |
| CN109779871A (en) * | 2019-02-28 | 2019-05-21 | 王湫锂 | A kind of fluid power injection device and application thereof |
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|---|---|
| CN102536725B (en) | 2014-05-21 |
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