CN104358684A - Flow balancing device for piston pump - Google Patents
Flow balancing device for piston pump Download PDFInfo
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- CN104358684A CN104358684A CN201410604996.7A CN201410604996A CN104358684A CN 104358684 A CN104358684 A CN 104358684A CN 201410604996 A CN201410604996 A CN 201410604996A CN 104358684 A CN104358684 A CN 104358684A
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- valve
- piston
- rod
- valve rod
- piston rod
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Abstract
The invention belongs to the field of a piston, and particularly relates to a flow balancing device for a piston pump. The flow balancing device comprises a pump body and a piston arranged in the pump body, wherein one end of a main piston rod is fixedly connected with the piston, the other end of the main piston rod extends out of the outer side of the pump body, the inside of the pump body is divided into two pump cavities by the piston, the two pump cavities are respectively communicated with a corresponding liquid inlet pipe and a corresponding liquid discharge pipe, the flow balancing device comprises a balancing piston rod, one end of the balancing piston rod is fixedly arranged at one side, deviating from the main piston rod, of the piston, the other end of the balancing piston rod extends out of the outer side of the pump body and forms sliding fit with a hydraulic buffer mechanism, and an axial line of the balancing piston rod is parallel to or coincident with an axial line of the main piston rod. Compared with the piston pump in the prior art, the flow balancing device has the advantages that the return speed of the piston is more uniform, the flow is more stable, the pulsation is more balanced, and the reliability and the stability of the work of the piston pump are improved.
Description
Technical field
The invention belongs to reciprocating pump field, be specifically related to a kind of flow equilibrium device for reciprocating pump.
Background technique
Reciprocating pump is widely used in the fields such as petrochemical industry, Coal Chemical Industry and oil field.As shown in Figure 1, comprise the pump housing 10 and the piston 30 be arranged in the pump housing 10, one end and the piston 30 of main piston rod 20 are affixed, and the other end of main piston rod 20 stretches out in the outside of the pump housing 10 for double-acting piston pump structure of the prior art; The pump housing 10 inside is divided into two pump chambers by described piston 30, and two pump chambers are connected with liquid-discharging tube to liquid inlet pipe corresponding separately respectively.Owing to there is the cylinder difference in volume that main piston rod 20 volume is formed in two pump chambers of the reciprocating pump in said structure all the time, when the volume of main piston rod 20 is larger, cylinder difference in volume can reach more than 20%, therefore for double-acting piston pump, all the time there is instability of flow, the pulsation shortcoming such as larger, the pump housing and assembly thereof bear the fluctuation because causing compared with large discharge difference and unstability impact by continuing, thus reciprocating pump easily breaks down, and working life reduces.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of flow equilibrium device for reciprocating pump, this apparatus structure is simple, and good stability, has ensured the reliability and stability of reciprocating pump work.
For achieving the above object, present invention employs following technological scheme:
For a flow equilibrium device for reciprocating pump, comprise the pump housing and be arranged on the piston in the pump housing, one end and the piston of main piston rod are affixed, and the other end of main piston rod stretches out the outside at the pump housing; Pump body is divided into two pump chambers by described piston, two pump chambers are connected with liquid-discharging tube to liquid inlet pipe corresponding separately respectively, this device comprises equalizing piston bar, one end of described equalizing piston bar is fixedly installed on the side deviating from main piston rod of piston, and the other end of equalizing piston bar stretches out the outside at the pump housing and forms with hydraulic buffering mechanism and is slidably matched; The described axis of equalizing piston bar is with the axis being parallel of main piston rod or overlap.
Preferably, the shaft equal diameters of described equalizing piston bar and main piston rod.
Preferably, described hydraulic buffering mechanism comprises balance set with tubular inner chamber and gland, one end outside the pump housing of stretching out of described equalizing piston bar to be inserted in the tubular inner chamber of balance set and is formed with balance set and is slidably matched, described gland envelope is located at the other end of the far from equilibrium piston rod of balance set, and described equalizing piston bar, balance set and gland enclose hydraulic pressure cavity jointly; Described gland is provided with buffer solution outlet and buffer inlet; Described hydraulic buffering mechanism also comprises the liquid valve group of the outlet of connection buffer solution and hydraulic pressure cavity and is communicated with the liquid feed valve group of buffer inlet and hydraulic pressure cavity.
Preferably, seal washer is provided with between described balance set and gland.
Further, described liquid valve group comprises the valve seat be fixedly installed in gland; Described valve seat is tubular, the internal face inwardly protruding of the close buffer solution outlet side of valve seat forms limited part, the side towards hydraulic pressure cavity of described limited part is installed with the valve pocket of tubular, valve rod passes valve pocket and forms with valve pocket and is slidably matched, described valve pocket is axially arranged with the runner running through valve pocket along valve pocket, described flow passage buffer solution outlet and hydraulic pressure cavity; One end and the sealed end of the close buffer solution outlet of described valve rod are provided with the seal bar head of shutoff at described limited part place, the other end of valve rod and positive stop end are through described valve pocket and towards the extension of hydraulic pressure cavity side, and the positive stop end of valve rod is provided with and makes valve rod keep the reset assembly of shutoff at limited part place;
Described liquid feed valve group also comprises the valve seat be fixedly installed in gland, is admittedly arranged on the valve pocket on valve seat, the valve rod be interspersed in valve pocket; Valve seat, valve pocket and valve rod and valve seat in liquid valve group in liquid feed valve group, valve pocket are all corresponding identical with the structure of valve rod, in liquid feed valve group the seal bar head of valve rod be positioned at valve rod towards hydraulic pressure cavity one end, in liquid feed valve group the positive stop end of valve rod be positioned at valve rod towards buffer inlet one end.
Further, described reset assembly comprises Returnning spring and positioning element; Described positioning element is installed in the end away from the first end of seal bar of valve rod, and described Returnning spring is sheathed on valve rod, and one end and the positioning element of Returnning spring are fixedly connected, and the other end and the valve pocket of Returnning spring are fixedly connected.
Further, one end of matching with seal bar head of described valve seat limited part is in the anchor ring shape to valve seat inner inclination, and described seal bar head is then in the conical surface shape being convenient to fit with the anchor ring of described limited part.
Beneficial effect of the present invention is:
1), the present invention is provided with equalizing piston bar at the opposite side of piston, and stretching out of equalizing piston bar is then provided with hydraulic buffering mechanism in one end of the pump housing, and described equalizing piston bar and hydraulic buffering mechanism form flow equilibrium device jointly.The setting of equalizing piston bar, the cylinder difference in volume between two pump chambers decreasing the pump housing, when the shaft equal diameters of equalizing piston bar and main piston rod, the operation of the pump housing will reach optimum operating condition.The use of flow equilibrium device, not only can increase the robustness that plunger runs effectively, and flow trim when also making pump operation, pulsation reduce, and substantially increase global stability and the reliability of reciprocating pump unit.
2) hydraulic buffering mechanism, in the present invention comprises balance set and gland, described equalizing piston bar and balance set, gland enclose hydraulic pressure cavity jointly, when equalizing piston bar slides along balance set, suction or extrusion buffer solution in hydraulic pressure cavity, thus increase equalizing piston bar traveling comfort, further increase global stability and the reliability of reciprocating pump unit.
3) the liquid in-out valve group, in the present invention is made up of valve seat, valve pocket and valve rod, the sealed end of valve rod is provided with seal bar head, the positive stop end of valve rod is provided with reset assembly, because reset assembly has certain elastic resistance, because this reducing the speed of buffer solution turnover hydraulic pressure cavity, thus making the opening speed of piston more even, the flow of reciprocating pump is more steady, and pulsation balances more.
4) the described valve seat limited part, in the present invention and the fitting surface of described seal bar head are inclined-plane, thus decrease the vibration and impact that produce when seal bar head contacts with limited part when seal bar head resets, improve the working life of flow equilibrium device.
Accompanying drawing explanation
Fig. 1 is the structural representation of double-acting piston pump in prior art.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the enlarged diagram of part-structure in Fig. 2.
Fig. 4 is the structural representation of liquid valve group in Fig. 3.
Corresponding to number in the figure, each component names is as follows:
10-pump housing, 11-liquid inlet pipe, 12-drain pipe
20-main piston rod, 30-piston, 40-equalizing piston bar
50-balance set, 51-hydraulic pressure cavity
60-gland, 61-buffer solution outlet, 62-buffer inlet
70-seal washer 80a-liquid valve group 80b-liquid feed valve group
81-valve seat, 811-limited part, 812-confined planes
82-valve rod, 821-seal bar, 83-Returnning spring
84-positioning element, 85-valve pocket, 851-runner
Embodiment
For ease of understanding, composition graphs 2 ~ 4 does following description to the integral installation distribution assembly of the flow equilibrium device for reciprocating pump and workflow herein:
As shown in Figure 2,3, a kind of flow equilibrium device for reciprocating pump, the piston 30 comprising the pump housing 10 and be arranged in the pump housing 10, one end and the piston 30 of main piston rod 20 are affixed, and the other end of main piston rod 20 stretches out in the outside of the pump housing 10; The pump housing 10 inside is divided into two pump chambers by described piston 30, two pump chambers are connected with liquid-discharging tube to liquid inlet pipe corresponding separately respectively, this device comprises equalizing piston bar 40, the shaft equal diameters of described equalizing piston bar 40 and main piston rod 20, one end of described equalizing piston bar 40 is fixedly installed on the side deviating from main piston rod 20 of piston 30, and the other end of equalizing piston bar 40 stretches out in the outside of the pump housing 10 and forms with hydraulic buffering mechanism and is slidably matched; The axis of described equalizing piston bar 40 and the dead in line of main piston rod 20.
Equalizing piston bar 40 in the present embodiment is coaxially arranged with main piston rod 20.Equalizing piston bar 40 can certainly be set to two or more, makes the axis of this multiple equalizing piston bar 40 and the axis being parallel of main piston rod 20 during installation.
As Fig. 2,3, described hydraulic buffering mechanism comprises balance set 50 with tubular inner chamber and gland 60, one end outside the pump housing 10 of stretching out of described equalizing piston bar 40 to be inserted in the tubular inner chamber 51 of balance set 50 and is formed with balance set 50 and is slidably matched, described gland 60 envelope is located at the other end of the far from equilibrium piston rod 40 of balance set 50, and described equalizing piston bar 40, balance set 50 and gland 60 enclose hydraulic pressure cavity 51 jointly; Described gland 60 is provided with buffer solution outlet 61 and buffer inlet 62; Described hydraulic buffering mechanism also comprises and is communicated with buffer solution outlet 61 and the liquid valve group 80a of the hydraulic pressure cavity 51 and liquid feed valve group 80b being communicated with buffer inlet 62 and hydraulic pressure cavity 51.
As shown in Figure 3, be provided with seal washer 70 between described balance set 50 and gland 60, the setting of seal washer 70 ensure that sealing and the stability of flow equilibrium apparatus structure.
The structure of liquid feed valve group 80b and liquid valve group 80a is identical, describes in detail below for liquid valve group 80a:
As shown in Figure 3,4, described liquid valve group 80a comprises the valve seat 81 be fixedly installed in gland 60; Described valve seat 81 is in tubular, the close buffer solution of valve seat 81 exports the internal face inwardly protruding formation limited part 811 of 61 sides, the side towards hydraulic pressure cavity 51 of described limited part 811 is installed with the valve pocket 85 of tubular, valve rod 82 passes valve pocket 85 and forms with valve pocket 85 and is slidably matched, described valve pocket 85 is axially arranged with the runner 851 running through valve pocket along valve pocket, described runner 851 is communicated with buffer solution outlet 61 and hydraulic pressure cavity 51; One end of the close buffer solution outlet 61 of described valve rod 82 and sealed end are provided with the seal bar of shutoff at described limited part 811 place 821, the other end of valve rod 82 and positive stop end are through described valve pocket 85 and towards the extension of hydraulic pressure cavity 51 side, the positive stop end of valve rod 82 is provided with and makes valve rod 82 keep shutoff at the reset assembly at limited part 811 place; Described reset assembly comprises Returnning spring 83 and positioning element 84; Described positioning element 84 is installed in the end away from seal bar 821 one end of valve rod 82, and described Returnning spring 83 is sheathed on valve rod 82, and one end and the positioning element 84 of Returnning spring 83 are fixedly connected, and the other end and the valve pocket 85 of Returnning spring 83 are fixedly connected.
Described liquid feed valve group 80b also comprises the valve seat be fixedly installed in gland, is admittedly arranged on the valve pocket on valve seat, the valve rod be interspersed in valve pocket; Valve seat, valve pocket and valve rod and valve seat in liquid valve group 80a in liquid feed valve group 80b, valve pocket are all corresponding identical with the structure of valve rod, as shown in Figure 3, in liquid feed valve group 80b the seal bar head of valve rod be positioned at valve rod towards hydraulic pressure cavity one end, in liquid feed valve group 80b the positive stop end of valve rod be positioned at valve rod towards buffer inlet 62 one end.
As shown in Figure 4, described valve seat limited part 81 with seal bar 821 one end of matching in the anchor ring shape of valve seat inner inclination, this anchor ring is the confined planes 812 shown in Fig. 4, and described seal bar 821 is in the conical surface shape being convenient to fit with the confined planes 812 of described limited part 81.
Below in conjunction with accompanying drawing 2, working procedure of the present invention is elaborated:
During work, as shown in Figure 2, when main piston rod 20 drives piston 30 along dotted arrow to left movement, equalizing piston bar 40 is followed piston 30 and is moved to the left, medium now on the left of the pump housing 10 in pump chamber i.e. 1 chamber is discharged, now liquid feed valve group 80b opens and liquid valve group 80a closes, and buffer solution slowly enters hydraulic pressure cavity 51 by liquid feed valve group 80b; When main piston rod 20 drives piston 30 to move right along dotted arrow, equalizing piston bar 40 is followed piston 30 and is moved right, medium now on the right side of the pump housing 10 in pump chamber i.e. 2 chambeies is discharged, now liquid feed valve group 80b close and liquid valve group 80a opens, buffer solution slowly discharges hydraulic pressure cavity 51 by liquid valve group 80a.
Compare reciprocating pump of the prior art, the opening speed of the piston in the present invention is more even, and flow is more steady, and pulsation balances more, improves the reliability and stability of reciprocating pump work.
Claims (7)
1. the flow equilibrium device for reciprocating pump, comprise the pump housing (10) and be arranged on the piston (30) in the pump housing (10), one end and the piston (30) of main piston rod (20) are affixed, and the other end of main piston rod (20) stretches out the outside in the pump housing (10); The pump housing (10) inside is divided into two pump chambers by described piston (30), two pump chambers are connected with liquid-discharging tube to liquid inlet pipe corresponding separately respectively, it is characterized in that: this device comprises equalizing piston bar (40), one end of described equalizing piston bar (40) is fixedly installed on the side deviating from main piston rod (20) of piston (30), and the other end of equalizing piston bar (40) stretches out to form in the outside of the pump housing (10) and with hydraulic buffering mechanism and is slidably matched; The axis of described equalizing piston bar (40) is with the axis being parallel of main piston rod (20) or overlap.
2. the flow equilibrium apparatus structure for reciprocating pump according to claim 1, is characterized in that: the shaft equal diameters of described equalizing piston bar (40) and main piston rod (20).
3. the flow equilibrium apparatus structure for reciprocating pump according to claim 1 and 2, it is characterized in that: described hydraulic buffering mechanism comprises balance set (50) with tubular inner chamber and gland (60), stretching out of described equalizing piston bar (40) to be inserted in the one end in the pump housing (10) outside in the tubular inner chamber (51) of balance set (50) and forms with balance set (50) and be slidably matched, described gland (60) envelope is located at the other end of the far from equilibrium piston rod (40) of balance set (50), described equalizing piston bar (40), balance set (50) and gland (60) enclose hydraulic pressure cavity (51) jointly, described gland (60) is provided with buffer solution outlet (61) and buffer inlet (62), described hydraulic buffering mechanism also comprises the liquid valve group (80a) being communicated with buffer solution outlet (61) and hydraulic pressure cavity (51) and the liquid feed valve group (80b) being communicated with buffer inlet (62) and hydraulic pressure cavity (51).
4. the flow equilibrium apparatus structure for reciprocating pump according to claim 3, is characterized in that: be provided with seal washer (70) between described balance set (50) and gland (60).
5. the flow equilibrium apparatus structure for reciprocating pump according to claim 3, is characterized in that: described liquid valve group (80a) comprises the valve seat (81) be fixedly installed in gland (60); Described valve seat (81) is in tubular, the internal face inwardly protruding of close buffer solution outlet (61) side of valve seat (81) forms limited part (811), the side towards hydraulic pressure cavity (51) of described limited part (811) is installed with the valve pocket (85) of tubular, valve rod (82) forms through valve pocket (85) and with valve pocket (85) and is slidably matched, described valve pocket (85) is axially arranged with the runner (851) running through valve pocket along valve pocket, described runner (851) is communicated with buffer solution outlet (61) and hydraulic pressure cavity (51); One end and the sealed end of close buffer solution outlet (61) of described valve rod (82) are provided with the seal bar head (821) of shutoff at described limited part (811) place, the other end of valve rod (82) and positive stop end are through described valve pocket (85) and towards the extension of hydraulic pressure cavity (51) side, and the positive stop end of valve rod (82) is provided with and makes valve rod (82) keep the reset assembly of shutoff at limited part (811) place;
Described liquid feed valve group (80b) also comprises the valve seat be fixedly installed in gland, is admittedly arranged on the valve pocket on valve seat, the valve rod be interspersed in valve pocket; Valve seat, valve pocket and valve rod and valve seat in liquid valve group (80a) in liquid feed valve group (80b), valve pocket are equal corresponding identical with the structure of valve rod, in liquid feed valve group (80b) the seal bar head of valve rod be positioned at valve rod towards hydraulic pressure cavity one end, in liquid feed valve group (80b) positive stop end of valve rod be positioned at valve rod towards buffer inlet (62) one end.
6. the flow equilibrium apparatus structure for reciprocating pump according to claim 5, is characterized in that: described reset assembly comprises Returnning spring (83) and positioning element (84); Described positioning element (84) is installed in the end away from seal bar head (821) one end of valve rod (82), described Returnning spring (83) is sheathed on valve rod (82), one end and the positioning element (84) of Returnning spring (83) are fixedly connected, and the other end and the valve pocket (85) of Returnning spring (83) are fixedly connected.
7. the flow equilibrium apparatus structure for reciprocating pump according to claim 5, it is characterized in that: one end of matching with seal bar head (821) of described valve seat limited part (81) is in the anchor ring shape to valve seat inner inclination, and described seal bar head (821) is then in the conical surface shape being convenient to fit with the anchor ring of described limited part (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410604996.7A CN104358684B (en) | 2014-10-30 | 2014-10-30 | A kind of flow equilibrium device for piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410604996.7A CN104358684B (en) | 2014-10-30 | 2014-10-30 | A kind of flow equilibrium device for piston pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104358684A true CN104358684A (en) | 2015-02-18 |
| CN104358684B CN104358684B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410604996.7A Active CN104358684B (en) | 2014-10-30 | 2014-10-30 | A kind of flow equilibrium device for piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104358684B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115628211A (en) * | 2021-11-26 | 2023-01-20 | 深圳华星恒泰泵阀有限公司 | Flow regulating structure and corresponding electromagnetic pump |
| CN117419026A (en) * | 2023-11-10 | 2024-01-19 | 欧技工业设备（江苏）有限公司 | Liquid flow pump with depressurization sealing structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1124824A (en) * | 1994-12-13 | 1996-06-19 | 胡俊威 | Reciprocating piston reversible recovery delivery pump |
| US5605446A (en) * | 1994-10-18 | 1997-02-25 | Graco Inc. | High viscosity material pump having valved priming piston |
| CN101372913A (en) * | 2007-08-21 | 2009-02-25 | 清华大学深圳研究生院 | Double group component hydraulic free-piston engine |
| CN202040296U (en) * | 2011-05-17 | 2011-11-16 | 侯亚峰 | Power transmission and hydraulic stepless speed change device |
| CN102619743A (en) * | 2012-04-17 | 2012-08-01 | 三一重工股份有限公司 | Distributing valve, pumping system and engineering machinery |
| CN103291664A (en) * | 2013-06-06 | 2013-09-11 | 王健 | Hydraulic buffering driving and buffering braking device |
| CN204253354U (en) * | 2014-10-30 | 2015-04-08 | 合肥工业大学 | A kind of flow equilibrium device for reciprocating pump |
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2014
- 2014-10-30 CN CN201410604996.7A patent/CN104358684B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5605446A (en) * | 1994-10-18 | 1997-02-25 | Graco Inc. | High viscosity material pump having valved priming piston |
| CN1124824A (en) * | 1994-12-13 | 1996-06-19 | 胡俊威 | Reciprocating piston reversible recovery delivery pump |
| CN101372913A (en) * | 2007-08-21 | 2009-02-25 | 清华大学深圳研究生院 | Double group component hydraulic free-piston engine |
| CN202040296U (en) * | 2011-05-17 | 2011-11-16 | 侯亚峰 | Power transmission and hydraulic stepless speed change device |
| CN102619743A (en) * | 2012-04-17 | 2012-08-01 | 三一重工股份有限公司 | Distributing valve, pumping system and engineering machinery |
| CN103291664A (en) * | 2013-06-06 | 2013-09-11 | 王健 | Hydraulic buffering driving and buffering braking device |
| CN204253354U (en) * | 2014-10-30 | 2015-04-08 | 合肥工业大学 | A kind of flow equilibrium device for reciprocating pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115628211A (en) * | 2021-11-26 | 2023-01-20 | 深圳华星恒泰泵阀有限公司 | Flow regulating structure and corresponding electromagnetic pump |
| CN115628211B (en) * | 2021-11-26 | 2023-08-04 | 深圳华星恒泰泵阀有限公司 | Flow regulating structure and corresponding electromagnetic pump |
| CN117419026A (en) * | 2023-11-10 | 2024-01-19 | 欧技工业设备（江苏）有限公司 | Liquid flow pump with depressurization sealing structure |
| CN117419026B (en) * | 2023-11-10 | 2024-03-08 | 欧技工业设备（江苏）有限公司 | Liquid flow pump with depressurization sealing structure |
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| CN104358684B (en) | 2016-08-24 |
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