CN204312315U - The distributing valve of pumping equipment, pumping equipment and pumping control system - Google Patents
The distributing valve of pumping equipment, pumping equipment and pumping control system Download PDFInfo
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- CN204312315U CN204312315U CN201420786661.7U CN201420786661U CN204312315U CN 204312315 U CN204312315 U CN 204312315U CN 201420786661 U CN201420786661 U CN 201420786661U CN 204312315 U CN204312315 U CN 204312315U
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- distributing valve
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- mixing blade
- pumping equipment
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Abstract
The utility model discloses a kind of distributing valve of pumping equipment, pumping equipment and a kind of pumping control system, to improve the suction capacity of concrete cylinder, and then improve the working efficiency of pumping equipment.The distributing valve of pumping equipment comprises: S shape is managed, and the discharge port of S shape pipe can be communicated with the carrier pipe of pumping equipment; Balance staff, outside the material entrance being arranged at S shape pipe, and is positioned on same shaft axis with the discharge port of S shape pipe; At least one mixing blade, is arranged at the outer wall of S shape pipe; When distributing valve swings around the shaft axis of balance staff, the material entrance of S shape pipe alternately with the inner space of two concrete cylinders of pumping equipment, at least one mixing blade can stir the concrete in the hopper of pumping equipment.When distributing valve swings, mixing blade can stir the concrete in hopper, and mixing blade manages action with S shape, thus avoids the concrete flow passage of concrete cylinder suction, reduces the suction resistance of concrete cylinder, improves suction effect.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to a kind of distributing valve of pumping equipment, pumping equipment and a kind of pumping control system.
Background technique
In engineering construction, for by concrete conveyance to the predetermined area, often can use pumping equipment.Common pumping equipment comprises: use universal vehicle chassis and concrete mixer with jib, uses universal vehicle chassis but does not install the Vehicle loaded pump of jib, and use simple vehicle frame drag pump.Wherein, pump truck has traveling, pumping, cloth three kinds of functions, and Vehicle loaded pump has traveling, pumping two kinds of functions, and drags pump only to have pump function.
As shown in Figure 1, the structure of existing pumping equipment generally includes: two pumping oil cylinders 1a, 1b that direction of action is contrary, be pumped two concrete cylinders 2a, 2b that oil cylinder 1a, 1b drive respectively, hopper 3, to the stirring apparatus 4 that hopper 3 inner concrete stirs, swingable distributing valve 5 (also referred to as S valve), two that drive distributing valve 5 to swing are distributed oil cylinder 6a, 6b.Wherein, the material entrance of distributing valve 5 alternately with the inner space of two concrete cylinders 2a, 2b, the discharge port of distributing valve 5 is communicated with carrier pipe (not shown).
The working procedure of pumping equipment is: distributing valve 5 is distributed oil cylinder 6a, 6b by two and drives, that replace with two concrete cylinders 2a, 2b inner space.The piston of two pumping oil cylinders 1a, 1b is along contrary direction action, to drive piston 2a ', the 2b ' of two concrete cylinders 2a, 2b along contrary direction action, thus the concrete in hopper 3 is sucked the inner chamber of concrete cylinder or the concrete in the inner chamber of concrete cylinder is pushed in carrier pipe via distributing valve 5.For preventing concrete disintegration in hopper 3 and condensation, stirring apparatus 4 (comprises and waits to expect and time-out such as to build at the situation in pumping procedure and in time-out pumping, sometimes suspend pumping and can reach more than 1 hour) in process, need to stir the concrete in hopper 3 always.
As shown in Figure 1, stirring apparatus 4 comprises stirring motor 4a, is stirred the stirring shaft 4b that motor 4a drives rotation, and is arranged on the mixing blade 4c on stirring shaft 4b.Usually, mixing blade 4c and stirring shaft 4b is arranged on the concrete flow passage of concrete cylinder material mouth front upper place, and this adds the suction resistance of concrete cylinder to a certain extent, thus causes the suction capacity of concrete cylinder poor, and then has influence on the working efficiency of pumping equipment.
Model utility content
The utility model embodiment provides a kind of distributing valve of pumping equipment, pumping equipment and a kind of pumping control system, to improve the suction capacity of concrete cylinder, and then improves the working efficiency of pumping equipment.
The distributing valve of the pumping equipment that the utility model embodiment provides, comprising:
S shape is managed, and the discharge port of described S shape pipe can be communicated with the carrier pipe of pumping equipment;
Balance staff, outside the material entrance being arranged at described S shape pipe, and is positioned on same shaft axis with the discharge port of described S shape pipe;
At least one mixing blade, is arranged at the outer wall of described S shape pipe;
When distributing valve swings around the shaft axis of described balance staff, the material entrance of described S shape pipe alternately with the inner space of two concrete cylinders of pumping equipment, at least one mixing blade described can stir the concrete in the hopper of pumping equipment.
In the technological scheme of the utility model embodiment, when distributing valve swings, mixing blade can stir the concrete in hopper.Mixing blade manages action with S shape, thus avoids the concrete flow passage of concrete cylinder suction, reduces the suction resistance of concrete cylinder.Compared to existing technology, adopt the distributing valve of this programme, greatly can improve the suction capacity of concrete cylinder, and then improve the working efficiency of pumping equipment.
Preferably, at least one mixing blade described near the material entrance of described S shape pipe, away from the discharge port of described S shape pipe.According to structure and the action feature of distributing valve, the material entrance amplitude of oscillation of S shape pipe is maximum, therefore, at least one mixing blade is arranged on the position of the material entrance near S shape pipe, can stirs the concrete in hopper fully.
Preferably, the shaft axis of described mixing blade and described balance staff is positioned at same plane.Adopt this design, when distributing valve swings back and forth around the shaft axis of balance staff, the stirring tangential force of mixing blade is maximum, can carry out more fully, uniformly stirring to the concrete in hopper like this.
Preferably, the quantity of described mixing blade is even number, and mixing blade described in even number is symmetrically distributed in the both sides of described balance staff and described S shape pipe.Adopt this design, stressing conditions when distributing valve can be made to swing back and forth is substantially suitable, thus mixing blade can be made to carry out more fully, uniformly stirring to the concrete in hopper.
Preferably, the angle α of symmetrically arranged two described mixing blades meets: 8 °≤α≤160 °.In this angular range, the mixing effect of mixing blade is better.
Preferably, between the outer wall of described mixing blade and S shape pipe, there is support floor; And/or described mixing blade has Pierced structure.Support floor and can improve structural strength, reduce the distortion of mixing blade, and then extend the working life of distributing valve.The Pierced structure of mixing blade can alleviate the weight of distributing valve, reduces to stir resistance, thus reduces the driving energy consumption of distributing valve.In addition, because Pierced structure has shunting effect, concrete stirring can be made more even.
Optionally, described mixing blade is welded with described S shape pipe, casts and connect or be connected by fastening piece.
The utility model embodiment still provides a kind of pumping equipment, comprising: two pumping oil cylinders that direction of action is contrary, respectively by two concrete cylinders, hopper, carrier pipes of two pumping hydraulic oil cylinder driving, and the distributing valve described in aforementioned arbitrary technological scheme, wherein:
The headwall of described hopper has the first pilot hole, the second pilot hole and two intercommunicating pores, the inner chamber of described two concrete cylinders is communicated with two intercommunicating pores respectively, the balance staff of described distributing valve is assemblied in the first pilot hole rotationally, and the discharge port outer wall of described distributing valve is assemblied in the second pilot hole rotationally.
The pumping equipment of the program, because distributing valve itself has the function of delivering concrete and ready-mixed concrete concurrently, and stirring action avoids the concrete flow passage of concrete cylinder suction, and therefore, the suction capacity of concrete cylinder is better, and the working efficiency of pumping equipment is higher.
Preferably, the inwall of described hopper is round and smooth inwall.Due in hopper without the need to arranging stirring apparatus in addition, therefore, it is comparatively round and smooth that the inwall of hopper can design, and curved surface is more smooth, thus makes concrete flowing more smooth and easy, not easily bonds at hopper inwall.
The utility model embodiment still provides a kind of pumping control system being applied to aforementioned pumping equipment, comprising:
Control the pumping valve group of two pumping cylinder actions;
Control the distributing valve group that two are distributed cylinder action;
Controller, is connected with pumping valve group and distributing valve group signal respectively, for when two pumping oil cylinder break-ofves, transmits control signal to distributing valve group, makes two to distribute oil cylinders according to setpoint frequency action.
When pumping equipment suspends pumping, can transmit control signal to distributing valve group, make two to distribute oil cylinders according to setpoint frequency action, to drive distributing valve to swing, the agitating function of distributing valve can prevent concrete disintegration in hopper and condensation.
Concrete, described controller, for when two pumping oil cylinder break-ofves, sends described control signal to distributing valve group, makes two to distribute oil cylinders with 5 ~ 30 minutes for the cycle, swing 2 ~ 10 times in each cycle.Two are distributed oil cylinder according to this setpoint frequency action, thus drive distributing valve to swing, and can prevent the concrete disintegration in hopper and condensation preferably, and required energy consumption are lower.
Accompanying drawing explanation
Fig. 1 is existing pumping equipment pumping theory schematic diagram;
Fig. 2 a is the distributing valve perspective view of the utility model embodiment;
Fig. 2 b is the main TV structure schematic diagram of distributing valve of the utility model embodiment;
Fig. 2 c is the left TV structure schematic diagram of distributing valve of the utility model embodiment;
Fig. 2 d is that structural representation looked up by the distributing valve of the utility model embodiment;
Fig. 3 is schematic diagram after the distributing valve of the utility model embodiment and hopper assemble;
Fig. 4 is the perspective view of hopper in the utility model embodiment;
Fig. 5 is the pumping control system structural representation of the utility model embodiment.
Reference character:
1a, 1b-pumping oil cylinder; 2a, 2b-concrete cylinder; 2a ', 2b '-piston; 3-hopper; 4-stirring apparatus; 5-distributing valve; 6a, 6b-distribute oil cylinder; 4a-stirring motor; 4b-stirring shaft; 4c-mixing blade; 500-distributing valve; 50-S shape is managed; 50a-material entrance; 50b-discharge port; 51-balance staff; 52-mixing blade; 53-supports floor; 30-hopper; 30a-first pilot hole; 30b-second pilot hole; 30c-intercommunicating pore; 60-pumping valve group; 61-distributing valve group; 62-controller.
Embodiment
In order to improve the suction capacity of concrete cylinder, and then improve the working efficiency of pumping equipment, the utility model embodiment provides a kind of distributing valve of pumping equipment, pumping equipment and a kind of pumping control system.In the technological scheme of the utility model embodiment, when distributing valve swings, mixing blade can stir the concrete in hopper.Mixing blade manages action with S shape, thus avoids the concrete flow passage of concrete cylinder suction, reduces the suction resistance of concrete cylinder.Compared to existing technology, adopt the distributing valve of this programme, greatly can improve the suction capacity of concrete cylinder, and then improve the working efficiency of pumping equipment.
The utility model is described with reference to the accompanying drawings below with specific embodiment.
As shown in Fig. 2 a ~ 2d and Fig. 3, the distributing valve 500 of the pumping equipment that the utility model one embodiment provides, comprising:
The discharge port 50b of S shape pipe 50, S shape pipe 50 can be communicated with the carrier pipe of pumping equipment;
Balance staff 51, is arranged at the outside of the material entrance 50a of S shape pipe 50, and is positioned on same shaft axis with the discharge port 50b of S shape pipe 50;
At least one mixing blade 52, is arranged at the outer wall of S shape pipe 50;
When distributing valve 500 swings around the shaft axis of balance staff 51, the material entrance 50a of S shape pipe 50 alternately with the inner space of two concrete cylinders of pumping equipment, at least one mixing blade 52 can stir the concrete in the hopper 30 of pumping equipment.
In the utility model embodiment, the particular type of pumping equipment is not limit, such as, for concrete mixer, Vehicle loaded pump or can drag pump etc.
Mixing blade 52 is not limit with the concrete Connecting format of S shape pipe 50, such as, can weld, cast and connect or connected by fastening piece (such as bolt).For improving the join strength of mixing blade 52 and S shape pipe 50, preferably, mixing blade 52 and S shape pipe 50 integral casting forming, namely casting is connected together.
As shown in Figure 2 d, have between the outer wall of mixing blade 52 and S shape pipe 50 and support floor 53, can structural strength be improved like this, reduce the distortion of mixing blade 52, and then extend the working life of distributing valve 500.In addition, mixing blade 52 can be designed as Pierced structure, can alleviate the weight of distributing valve 500 like this, reduces to stir resistance, thus reduces the driving energy consumption of distributing valve 500.In addition, because Pierced structure has shunting effect, concrete stirring can be made more even.
Please refer to shown in Fig. 2 b, Fig. 3 and Fig. 4, the balance staff 51 of distributing valve 500 is assemblied in the first pilot hole 30a of hopper 30 rotationally, and the outer wall of the discharge port 50b of S shape pipe 50 is assemblied in the second pilot hole 30b rotationally.Because balance staff 51 is arranged at outside the material entrance 50a of S shape pipe 50, and be positioned on same shaft axis with the discharge port 50b of S shape pipe 50, this makes distributing valve 500 when the shaft axis of balance staff 51 swings, the discharge port 50b position of S shape pipe 50 relatively fixing (only around the center rotating of discharge port), the material entrance 50a of S shape pipe 50 alternately with the inner space of two concrete cylinders of pumping equipment.
According to structure and the action feature of distributing valve 500, the material entrance 50a amplitude of oscillation of S shape pipe 50 is maximum, therefore, preferably, at least one mixing blade 52 is arranged on the position of the material entrance 50a near S shape pipe 50, like this, can stir the concrete in hopper 30 fully, prevent concrete disintegration and condensation.Shape, the size of mixing blade 52 can design according to the concrete specifications parameter of S shape pipe 50 and hopper 30.Preferably, the mating shapes of mixing blade 52 and S shape pipe 50 and hopper 30, can reduce like this and stir blind area, stir more fully to the concrete in hopper 30.
Please refer to shown in Fig. 2 c, in the preferred embodiment, mixing blade 52 is positioned at same plane with the shaft axis of balance staff 51.In other words, mixing blade 52 is arranged in the radial direction of the swinging track of S shape pipe 50.Like this, when distributing valve 500 swings back and forth around the shaft axis of balance staff 51, the stirring tangential force of mixing blade 52 is maximum, thus can carry out fully, uniformly stirring to the concrete in hopper 30.
The concrete quantity of the mixing blade 52 that distributing valve 500 comprises is not limit.Preferably, as shown in Figure 2 c, the quantity of mixing blade 52 is even number, and even number mixing blade 52 is symmetrically distributed in the both sides of balance staff 51 and S shape pipe 50.Adopt this design, stressing conditions when distributing valve 500 can be made to swing back and forth is substantially suitable, thus the concrete in mixing blade 52 pairs of hoppers 30 can be made to carry out more fully, uniformly stirring.Further, the angle α of symmetrically arranged two mixing blades 52 meets: 8 °≤α≤160 °.In this angular range, the mixing effect of mixing blade 52 is better.
In the technological scheme of the utility model above-described embodiment, when distributing valve 500 swings, mixing blade 52 can stir the concrete in hopper 30.Mixing blade 52 with the action of S shape pipe 50, thus avoids the concrete flow passage of concrete cylinder suction, reduces the suction resistance of concrete cylinder.Compared to existing technology, adopt the distributing valve 500 of this programme, greatly can improve the suction capacity of concrete cylinder, and then improve the working efficiency of pumping equipment.
In addition, because distributing valve 500 itself possesses agitating function, therefore can cancel existing stirring apparatus (as shown in Figure 1, comprising stirring motor 4a, stirring shaft 4b and mixing blade 4c), thus reduce manufacture cost and the maintenance cost of pumping equipment.When pumping equipment suspends pumping, can be swung by control distributing valve 500 and the concrete in hopper 30 is stirred, thus prevent the concrete disintegration in hopper 30 and condensation.
The utility model embodiment still provides a kind of pumping equipment, comprise: two pumping oil cylinders that direction of action is contrary, respectively by two concrete cylinders, hopper, carrier pipes of two pumping hydraulic oil cylinder driving, and the distributing valve of aforementioned arbitrary technological scheme (distributing valve structure can with reference to shown in figure 2a to Fig. 2 d, hopper construction can be shown with reference to figure 4), wherein:
The headwall of hopper 30 has the first pilot hole 30a, the second pilot hole 30b and two intercommunicating pore 30c, the inner chamber of two concrete cylinders is communicated with two intercommunicating pore 30c respectively, the balance staff 51 of distributing valve 500 is assemblied in the first pilot hole 30a rotationally, and the outer wall of the discharge port 50b of distributing valve 500 is assemblied in the second pilot hole 30b rotationally.
The pumping equipment of the program, because distributing valve 500 itself has the function of delivering concrete and ready-mixed concrete concurrently, and stirring action avoids the concrete flow passage of concrete cylinder suction, and therefore, the suction capacity of concrete cylinder is better, and the working efficiency of pumping equipment is higher.Concrete, when the inner chamber of suction concrete cylinder is from hopper 30 during suction, the inner chamber of material extrusion concrete cylinder is communicated with carrier pipe by distributing valve 500, and the inner chamber of material extrusion concrete cylinder passes through S shape pipe 50 to carrier pipe delivering concrete.Now, the position of mixing blade 52 avoids the concrete flow passage of concrete cylinder suction, thus reduces the suction resistance of concrete cylinder, improves the suction capacity of concrete cylinder.
As shown in Figure 4, the inwall of hopper 30 is round and smooth inwall.Because the distributing valve 500 in hopper 30 has the function of delivering concrete and ready-mixed concrete concurrently, without the need to arranging stirring apparatus in addition in hopper 30, therefore, bucket wall is without the need to offering stirring shaft mounting hole (stirring shaft of existing stirring apparatus needs to be arranged in the stirring shaft mounting hole of bucket wall), it is comparatively round and smooth, smooth that the inwall of hopper 30 can design, thus make concrete flowing more smooth and easy, not easily bond at hopper inwall.
As shown in Figure 5, the utility model embodiment still provides a kind of pumping control system being applied to aforementioned pumping equipment, comprising:
Control the pumping valve group 60 of two pumping cylinder actions;
Control the distributing valve group 61 that two are distributed cylinder action;
Controller 62, is connected with pumping valve group 60 and distributing valve group 61 signal respectively, for when two pumping oil cylinder break-ofves, transmits control signal to distributing valve group 61, makes two to distribute oil cylinders according to setpoint frequency action.
Controller 62 can adopt industrial control unit (ICU) able to programme or PC etc.When pumping equipment suspends pumping, can transmit control signal to distributing valve group 61, make two to distribute oil cylinders according to setpoint frequency action, to drive distributing valve to swing, the agitating function of distributing valve can prevent concrete disintegration in hopper and condensation.Such as, when pumping equipment suspends pumping, only two are distributed oil cylinder with 5 ~ 30 minutes for the cycle, and swing 2 ~ 10 times in each cycle, to stir the concrete in hopper.
Concrete, described controller 62, for when two pumping oil cylinder break-ofves, transmits control signal to distributing valve group 61, makes two to distribute oil cylinders with 5 ~ 30 minutes for the cycle, swing 2 ~ 10 times in each cycle.Two are distributed oil cylinder according to this setpoint frequency action, thus drive distributing valve to swing, and can prevent the concrete disintegration in hopper and condensation preferably, and required energy consumption are lower.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (11)
1. a distributing valve for pumping equipment, is characterized in that, comprising:
S shape is managed, and the discharge port of described S shape pipe can be communicated with the carrier pipe of pumping equipment;
Balance staff, outside the material entrance being arranged at described S shape pipe, and is positioned on same shaft axis with the discharge port of described S shape pipe;
At least one mixing blade, is arranged at the outer wall of described S shape pipe;
When distributing valve swings around the shaft axis of described balance staff, the material entrance of described S shape pipe alternately with the inner space of two concrete cylinders of pumping equipment, at least one mixing blade described can stir the concrete in the hopper of pumping equipment.
2. distributing valve as claimed in claim 1, is characterized in that, at least one mixing blade described near the material entrance of described S shape pipe, away from the discharge port of described S shape pipe.
3. distributing valve as claimed in claim 1, it is characterized in that, the shaft axis of described mixing blade and described balance staff is positioned at same plane.
4. distributing valve as claimed in claim 1, it is characterized in that, the quantity of described mixing blade is even number, and mixing blade described in even number is symmetrically distributed in the both sides of described balance staff and described S shape pipe.
5. distributing valve as claimed in claim 4, is characterized in that, the angle α of symmetrically arranged two described mixing blades meets: 8 °≤α≤160 °.
6. distributing valve as claimed in claim 1, is characterized in that having support floor between the outer wall of described mixing blade and S shape pipe; And/or described mixing blade has Pierced structure.
7. the distributing valve as described in any one of claim 1 ~ 6, is characterized in that, described mixing blade welds with described S shape pipe, cast and connect or be connected by fastening piece.
8. a pumping equipment, is characterized in that, comprising: two pumping oil cylinders that direction of action is contrary, respectively by two concrete cylinders, hopper, carrier pipes of two pumping hydraulic oil cylinder driving, and the distributing valve as described in any one of claim 1 ~ 7, wherein:
The headwall of described hopper has the first pilot hole, the second pilot hole and two intercommunicating pores, the inner chamber of described two concrete cylinders is communicated with two intercommunicating pores respectively, the balance staff of described distributing valve is assemblied in the first pilot hole rotationally, and the discharge port outer wall of described distributing valve is assemblied in the second pilot hole rotationally.
9. pumping equipment as claimed in claim 8, it is characterized in that, the inwall of described hopper is round and smooth inwall.
10. be applied to a pumping control system for pumping equipment described in claim 8 or 9, it is characterized in that, comprising:
Control the pumping valve group of two pumping cylinder actions;
Control the distributing valve group that two are distributed cylinder action;
Controller, is connected with pumping valve group and distributing valve group signal respectively, for when two pumping oil cylinder break-ofves, transmits control signal to distributing valve group, makes two to distribute oil cylinders according to setpoint frequency action.
11. pumping control systems as claimed in claim 10, is characterized in that, described controller, specifically for when two pumping oil cylinder break-ofves, transmit control signal to distributing valve group, make two to distribute oil cylinder with 5 ~ 30 minutes for the cycle, swing 2 ~ 10 times in each cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786661.7U CN204312315U (en) | 2014-12-12 | 2014-12-12 | The distributing valve of pumping equipment, pumping equipment and pumping control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420786661.7U CN204312315U (en) | 2014-12-12 | 2014-12-12 | The distributing valve of pumping equipment, pumping equipment and pumping control system |
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| Publication Number | Publication Date |
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| CN204312315U true CN204312315U (en) | 2015-05-06 |
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| CN201420786661.7U Active CN204312315U (en) | 2014-12-12 | 2014-12-12 | The distributing valve of pumping equipment, pumping equipment and pumping control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041214A (en) * | 2015-07-09 | 2015-11-11 | 四川川庆石油钻采科技有限公司 | Double-injection-pump continuous injection method suitable for particle drilling |
| CN106738275A (en) * | 2016-01-18 | 2017-05-31 | 周兆弟 | Foolproof concrete feeder equipment |
| CN109058525A (en) * | 2018-08-08 | 2018-12-21 | 徐州徐工施维英机械有限公司 | A kind of single outlet streamline valve body device of pumpable compressibility material |
| CN110258767A (en) * | 2019-04-24 | 2019-09-20 | 湖南睿弓机械科技有限公司 | Machines for mud clearage and its pumping system, distributor, pendulum valve module |
-
2014
- 2014-12-12 CN CN201420786661.7U patent/CN204312315U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041214A (en) * | 2015-07-09 | 2015-11-11 | 四川川庆石油钻采科技有限公司 | Double-injection-pump continuous injection method suitable for particle drilling |
| CN106738275A (en) * | 2016-01-18 | 2017-05-31 | 周兆弟 | Foolproof concrete feeder equipment |
| CN109058525A (en) * | 2018-08-08 | 2018-12-21 | 徐州徐工施维英机械有限公司 | A kind of single outlet streamline valve body device of pumpable compressibility material |
| CN110258767A (en) * | 2019-04-24 | 2019-09-20 | 湖南睿弓机械科技有限公司 | Machines for mud clearage and its pumping system, distributor, pendulum valve module |
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