CN102720670B - Hydraulic valve, concrete pumping system and concrete pump - Google Patents
Hydraulic valve, concrete pumping system and concrete pump Download PDFInfo
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- CN102720670B CN102720670B CN201210237746.5A CN201210237746A CN102720670B CN 102720670 B CN102720670 B CN 102720670B CN 201210237746 A CN201210237746 A CN 201210237746A CN 102720670 B CN102720670 B CN 102720670B
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Abstract
The invention provides a hydraulic valve which comprises a first valve body, a second valve body fixedly connected with the first valve body, and a valve plug rotatably arranged between the first valve body and the second valve body, wherein at least three through holes are arranged in the valve plug, hydraulic fluid ports with the quantity equal to the quantity of the through holes are arranged in both the first valve body and the second valve body, the valve plug is at least provided with two working positions, and when the valve plug is in different working positions, all hydraulic liquid ports in the first valve body and all hydraulic liquid ports in the second valve body are different in conduction relations. The invention also provides a concrete pumping system and a concrete pump. According to the technical scheme provided by the invention, the function of high pressure and low pressure switching can be rapidly realized, and the simpleness and the rapidness are achieved in operation; and the hydraulic valve has the advantages of reasonable and compact structure, small volume, light weight and convenience for maintenance.
Description
Technical field
The present invention relates to material pumping field, more specifically, relate to a kind of hydrovalve, there is concrete pumping system and the concrete pump of this kind of hydrovalve.
Background technique
Concrete pumping equipment is a kind of power equipment of delivering concrete, and common concrete pumping equipment comprises concrete pump, pump truck, Vehicle loaded pump, wet-spraying machine etc.
At present, the pumping system of concrete pumping equipment disposes high low pressure handover control system conventionally, high low pressure handover control system can be so that pumping system switches between high-pressure work state, operating on low voltage state, its objective is when pumping solvent or diluent and make low pressure pumping can obtain larger pump displacement, when pumping is expected firmly, can obtain larger pumping pressure to realize smooth pumping; In addition, when the faults such as plugging appear in pumping pipeline, high low pressure handover control system can switch to pumping system high-pressure work state, and high pressure can be so that delivery line be unobstructed.
In existing correlation technique, there is following several high low pressure switching control:
Manually change hydraulic pipe line: change manually hydraulic pipe line, the conversion of conversion pipeline high low pressure;
Combined valve piece: high/low pressure cut-over valve piece is used at least two parts to interconnect and forms, during switching, removes connecting bolt, conversion compound mode, then connect;
Many valves joint handoff: a plurality of cartridge valves, ball valve etc. are combined, and unified operation, completes function and switch;
Single valve rotate to switch: cylindrical spool rotates in valve body, by position, hole on bit alignment valve body in hole on spool to reach switching object.
There is following shortcoming in the high-low voltage switching device in correlation technique: manually change hydraulic pipe line, switch speed is slow, can not switch in time, and the operating time is longer, and human cost is higher; At least two parts of Combined valve piece interconnect and form, and the operating time is slightly long, outside during operation, valve piece internal duct is exposed to, easily pollute; Many valves joint handoff, system complex, cost is high, and volume, weight are larger; Single valve rotates and switches, and volume, weight are slightly large, cylinder sealing difficulty.
Summary of the invention
In order to solve above-mentioned the problems of the prior art, the invention provides a kind of hydrovalve, lightweight, volume is little, simple to operate, easy to maintenance.On the other hand, the present invention also provides a kind of concrete pumping system.Moreover the present invention also provides a kind of concrete pump.
The invention provides a kind of hydrovalve, comprise the first valve body, second valve body affixed with described the first valve body, and be located at rotationally the spool between described the first valve body and described the second valve body, described spool is provided with at least three through holes, described the first valve body, on the second valve body, be equipped with the hydraulic fluid port equating with the quantity of described through hole, described through hole is for the hydraulic fluid port on described the first valve body of man-to-man connection and the hydraulic fluid port on described the second valve body, described through hole, hydraulic fluid port is uniformly distributed around the rotary centerline of described spool respectively, and the projection of the hydraulic fluid port on the hydraulic fluid port on described the first valve body and described the second valve body in the plane perpendicular to described rotary centerline is not overlapping, described spool at least has two working positions, described spool is when different working position, conducting relation between each hydraulic fluid port on each hydraulic fluid port on described the first valve body and described the second valve body is different.
Technological scheme provided by the invention, rotates in the first valve body and the second valve body by controlling spool, completes the high low pressure switching function of concrete pumping system, and without dismounting, described hydrovalve is simple in structure, is easy to realize, and can significantly improve manufacturing efficiency.
In above-mentioned basic technology scheme, preferably, described spool is cylindrical, described spool can rotate around its central axis, described through hole and described central axis be arranged in parallel, are equipped with and described spool depressed part that match, that cross section is rounded on described the first valve body, the second valve body, and described hydraulic fluid port is located on the bottom surface of described depressed part, the depressed part of the depressed part of described the first valve body and the second valve body forms cavity, and described spool is located in described cavity.
Spool is the cylindrical of rule, be convenient to manufacturing, be easy to match and realize the high low pressure switching function of pumping system with the first valve body, the second valve body simultaneously, on the first valve body and the second valve body, depressed part is set, this depressed part forms the cavity that spool is installed, and this design can be so that the structure of hydrovalve be compacter, simply, save installing space, reduce the weight of hydrovalve, cost-saving.
In technique scheme, preferably, also comprise back shaft, described spool is fixedly arranged on described back shaft, and the two ends of described back shaft are rotatably installed on respectively on described the first valve body and the second valve body.
Adopt back shaft can make the connection of spool and the first valve body, the second valve body more firm, make spool more steady with respect to the rotation of the first valve body, the second valve body.
In technique scheme, preferably, on described spool, be evenly equipped with the first through hole, the second through hole and third through-hole; On described the first valve body, be evenly equipped with the first hydraulic fluid port, the second hydraulic fluid port and the 3rd hydraulic fluid port; On described the second valve body, be evenly equipped with the 4th hydraulic fluid port, the 5th hydraulic fluid port and the 6th hydraulic fluid port; Described spool is when the first working position, and described the first through hole is communicated with described the first hydraulic fluid port and described the 4th hydraulic fluid port, and described the second through hole is communicated with described the second hydraulic fluid port and described the 5th hydraulic fluid port, and described third through-hole is communicated with described the 3rd hydraulic fluid port and described the 6th hydraulic fluid port; Described spool is when the second working position, and described the first through hole is communicated with described the 6th hydraulic fluid port and described the first hydraulic fluid port, and described the second through hole is communicated with described the 4th hydraulic fluid port and described the second hydraulic fluid port, and described third through-hole is communicated with described the 5th hydraulic fluid port and described the 3rd hydraulic fluid port.
In technique scheme, preferably, on described spool, be provided with mounting hole; In described mounting hole, position-limited lever is installed; On described the first valve body and described the second valve body, be provided with reversing groove; Described position-limited lever rotates along described reversing groove, can control described spool respectively in described the first working position and described the second working position.
Like this, can realize the spacing of valve core rotation, the switching deviation of avoiding its rotation deficiency or rotation angle to cause too greatly, guarantees that the state of hydrovalve switches precision; Position-limited lever can also be as drive unit simultaneously, and rotary spacing bar can be with the corresponding rotation of movable valve plug.
In technique scheme, preferably, described spool is fixedly connected with by key with described back shaft; The two ends of described back shaft are installed on described the first valve body and the second valve body by bearing respectively; One end of described back shaft connects rotary power unit, and described rotary power unit drives described back shaft to rotate, and described back shaft drives described valve core rotation.
Adopt rotary power unit to drive back shaft, back shaft drives valve core rotation, and rotation that can autocontrol valve core, realizes the switching of the working state of hydrovalve, and automaticity is high, reduces workman's labor intensity.
In above-mentioned arbitrary technological scheme, preferably, between described the first valve body and described the second valve body, by flange, connect.
Adopt flange and bolt that the first valve body and the second valve body are fixed together, facilitate the installation and removal of hydrovalve, improve and produce and maintenance efficiency.
In above-mentioned arbitrary technological scheme, preferably, also comprise connecting screw rod, described connecting screw rod is successively through described the first valve body, spool and described the second valve body, and the two ends of described connecting screw rod are separately installed with nut;
Or one end of described connecting screw rod is fixed on the first valve body or the second valve body, the other end of described connecting screw rod is provided with nut.
This mode is owing to only needing a connecting screw rod and maximum two nuts, can realize the connection of the first valve body, spool and the second valve body, the dismounting of a plurality of bolts that connect with respect to flange, has improved the dismounting efficiency of hydrovalve greatly, save installation time, enhance productivity.
The present invention also provides a kind of concrete pumping system, comprises the first oil cylinder and the second oil cylinder, in described the first oil cylinder, is provided with first piston, is provided with first piston bar on described first piston; In described the second oil cylinder, be provided with the second piston, on described the second piston, be provided with the second piston rod, described concrete pumping system also comprises above-mentioned hydrovalve, the outer end of described the first hydraulic fluid port is communicated to the rodless cavity of described the first oil cylinder, described the second hydraulic fluid port is communicated with pressure medium source, and described the 3rd hydraulic fluid port is communicated to the rod chamber of described the first oil cylinder; Described the 4th hydraulic fluid port is communicated to the rodless cavity of described the second oil cylinder, and described the 5th hydraulic fluid port is communicated to the rod chamber of described the second oil cylinder, and described the 6th hydraulic fluid port is communicated with described pressure medium source.
The present invention also provides a kind of concrete pump, comprises hydrovalve as above or concrete pumping system.
In sum, by controlling described valve core rotation, can realize rapidly the high low pressure switching function in concrete pumping system work, simple to operate, quick, described hydrovalve compact structure, volume is little, lightweight, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is according to hydrovalve one embodiment's of the present invention schematic perspective view;
Fig. 2 is the exploded perspective view of structure shown in Fig. 1;
Fig. 3 is the structural representation of spool in Fig. 2;
Fig. 4 is that schematic diagram is looked on a left side for structure shown in Fig. 3;
Fig. 5 is the structural representation of the first valve body in Fig. 2;
Fig. 6 is that schematic diagram is looked on a left side of Fig. 5;
Fig. 7 is that the master of structure shown in Fig. 1 looks schematic diagram;
Fig. 8 be in Fig. 7 A – A to cross-sectional schematic;
Fig. 9 is B portion enlarged diagram in Fig. 8;
Figure 10 is the schematic diagram of structure shown in Fig. 1 when the first working state;
Figure 11 is according to the principle schematic of the first working state in concrete pumping system one embodiment of the present invention;
Figure 12 is the structural representation of structure shown in Fig. 1 when the second working state;
Figure 13 is according to the principle schematic of the second working state in concrete pumping system one embodiment of the present invention;
Figure 14 is according to another embodiment's of hydrovalve of the present invention perspective view;
Figure 15 is the plan view of structure shown in Figure 14;
Figure 16 be in Figure 15 C – C to analysing and observe.
Wherein, in Fig. 1 to Figure 16, the corresponding relation between reference character and component names is:
1 first valve body 11 first hydraulic fluid port 12 second hydraulic fluid port 13 the 3rd hydraulic fluid ports
2 second valve body 20 reversing grooves 24 the 4th hydraulic fluid ports
25 the 5th hydraulic fluid port 26 the 6th hydraulic fluid ports
3 spool 30 mounting hole 31 first through hole 32 second through holes
33 third through-hole 4 back shaft 5 seal rings
6 first oil cylinder 61 first piston 62 first piston bars
7 second oil cylinder 71 second piston 72 second piston rods
Embodiment
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, in the situation that not conflicting, the application's embodiment and the feature in embodiment can combine mutually.
A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt and be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
As shown in Figures 1 to 9, the invention provides a kind of hydrovalve, comprise the first valve body 1, second valve body 2 affixed with described the first valve body 1, and be located at rotationally the spool 3 between described the first valve body 1 and described the second valve body 2, described spool 3 is provided with at least three through holes, described the first valve body 1, on the second valve body 2, be equipped with the hydraulic fluid port equating with the quantity of described through hole, described through hole is for the hydraulic fluid port on described the first valve body 1 of man-to-man connection and the hydraulic fluid port on described the second valve body 2, described through hole, hydraulic fluid port is uniformly distributed around the rotary centerline of described spool 3 respectively, and the projection of the hydraulic fluid port on the hydraulic fluid port on described the first valve body 1 and described the second valve body 2 in the plane perpendicular to described rotary centerline is not overlapping, described spool 3 at least has two working positions, described spool 3 is when different working position, conducting relation between each hydraulic fluid port on each hydraulic fluid port on described the first valve body 1 and described the second valve body 2 is different.
Technological scheme provided by the invention, by controlling described spool 3 in described the first valve body 1 and the interior rotation of the second valve body 2, on change the first valve body 1, the conducting relation between each hydraulic fluid port on each hydraulic fluid port and the second valve body 2, realizes different functions; In the high low pressure handoff procedure of pumping system, without dismounting, hydrovalve simple in structure, is easy to realize.
As shown in Figure 2, in the present embodiment, described spool 3 is cylindrical, described spool 3 can rotate around its central axis, described through hole and described central axis be arranged in parallel, on described the first valve body 1, the second valve body 2, are equipped with the depressed part that match with described spool 3, cross section is rounded, and described hydraulic fluid port is located on the bottom surface of described depressed part, the depressed part of the depressed part of described the first valve body 1 and the second valve body 2 forms cavity, and described spool 3 is located in described cavity.
Spool 3 is the cylindrical of rule, be convenient to manufacturing, be easy to match and realize the high low pressure switching function of pumping system with the first valve body, the second valve body simultaneously, on the first valve body and the second valve body, depressed part is set, this depressed part forms the cavity that spool is installed, and this design can be so that the structure of hydrovalve be compacter, simply, save installing space, reduce the weight of hydrovalve, cost-saving.
As shown in Figure 2, this hydrovalve also comprises back shaft 4, and described spool 3 is fixedly arranged on described back shaft 4, and the two ends of described back shaft 4 are rotatably installed on respectively on described the first valve body 1 and the second valve body 2.
Adopt back shaft can make the connection of spool and the first valve body, the second valve body more firm, make spool more steady with respect to the rotation of the first valve body, the second valve body.
In a kind of embodiment, as shown in Figures 1 to 9, on described spool 3, be evenly equipped with the first through hole 31, the second through hole 32 and third through-hole 33;
On described the first valve body 1, be evenly equipped with the first hydraulic fluid port 11, the second hydraulic fluid port 12 and the 3rd hydraulic fluid port 13;
On described the second valve body 2, be evenly equipped with the 4th hydraulic fluid port 24, the 5th hydraulic fluid port 25 and the 6th hydraulic fluid port 26.
As shown in figure 10, when spool 3 is during in the first working position, described the first through hole 31 is communicated with described the first hydraulic fluid port 11 and described the 4th hydraulic fluid port 24, described the second through hole 32 is communicated with described the second hydraulic fluid port 12 and described the 5th hydraulic fluid port 25, and described third through-hole 33 is communicated with described the 3rd hydraulic fluid port 13 and described the 6th hydraulic fluid port 26.
As shown in figure 12, when spool 3 is positioned at the second working position, described the first through hole 31 is communicated with described the 6th hydraulic fluid port 26 and described the first hydraulic fluid port 11, described the second through hole 32 is communicated with described the 4th hydraulic fluid port 24 and described the second hydraulic fluid port 12, and described third through-hole 33 is communicated with described the 5th hydraulic fluid port 25 and described the 3rd hydraulic fluid port 13.
Three through holes on spool are connected three hydraulic fluid ports of the first valve body 1 one to one with three hydraulic fluid ports of the second valve body 2, by rotational valve core 3, make spool in different working positions, can realize the variation of hydrovalve working state.
As shown in Figure 1, in above-mentioned basic technology scheme, further, on described spool 3, be provided with mounting hole 30; In mounting hole 30, be provided with position-limited lever; On the first valve body 1 and described the second valve body 2, be provided with reversing groove 20; Described position-limited lever rotates along described reversing groove 20, can control described spool respectively in described the first working position and described the second working position.
Position-limited lever is arranged in mounting hole 30, by pulling position-limited lever, can be with movable valve plug 3 to rotate, and position-limited lever is in the interior swing of reversing groove 20, and limit the range of movement of position-limited lever at the two ends of reversing groove 20.
Further, spool 3 is connected by key with back shaft 4; The two ends of back shaft 4 are installed on the first valve body 1 and the second valve body 2 by bearing respectively; One end of back shaft 4 connects rotary power unit, and rotary power unit drives described back shaft 4 to rotate, and described back shaft 4 drives described spool 3 to rotate.Like this, rotation that can autocontrol valve core, realizes the switching of the working state of hydrovalve, and automaticity is high, reduces workman's labor intensity.
It can be flat key or spline joint that above-mentioned key connects, and described rotary power unit can be motor, can be also oil hydraulic motor or air pressure motor, can also be to drive handwheel.
By motor or motor driving back shaft 4, rotate, back shaft 4 can be with again movable valve plug 3 to rotate, and the angle of rotation can limit by position-limited lever and reversing groove 20.
As shown in Figure 2 and Figure 9, the periphery of through hole is provided with seal ring 5.
Spool 3 rotates in the cavity of the first valve body 1 and the second valve body 2 compositions, and spool 3 and the first valve body 1 and the second valve body 2 exist gap, and the periphery that seal ring 5 is located at through hole seals through hole, prevents hydraulic oil leakage, guarantees the hydraulic efficiency of hydrovalve.
Shown in Fig. 5, Fig. 7 and Fig. 8, between the first valve body 1 and the second valve body 2, by flange, connect as shown in Figure 1, Figure 2.
Adopt flange and bolt that the first valve body 1 and the second valve body 2 are fixed together, facilitate the installation and removal of hydrovalve, improve and produce and maintenance efficiency.
Certainly, between the first valve body 1 and the second valve body 2, can also connect by following mode:
This hydrovalve also comprises connecting screw rod, and described connecting screw rod is successively through described the first valve body 1, spool 3 and described the second valve body 2, and the two ends of described connecting screw rod are separately installed with nut; Or one end of described connecting screw rod is fixed on the first valve body 1 or the second valve body 2, the other end of described connecting screw rod is provided with nut.
This mode is owing to only needing a connecting screw rod and maximum two nuts, can realize the connection of the first valve body, spool and the second valve body, the dismounting of a plurality of bolts that connect with respect to flange, has improved the dismounting efficiency of hydrovalve greatly, save installation time, enhance productivity.
As shown in Figure 10 to Figure 13, the present invention also provides a kind of concrete pumping system, comprising: in the first oil cylinder 6 and the second oil cylinder 7, the first oil cylinders 6, be provided with first piston 61, be provided with first piston bar 62 on first piston; In the second oil cylinder 7, be provided with on the second piston 71, the second pistons and be provided with the second piston rod 72, this concrete pumping system also comprises the hydrovalve in above-described embodiment, wherein:
The outer end of the first hydraulic fluid port 11 is communicated to the rodless cavity of the first oil cylinder 6, and the second hydraulic fluid port 12 is communicated with the D mouth of hydraulic system, and the 3rd hydraulic fluid port 13 is communicated to the rod chamber of the first oil cylinder 6;
The 4th hydraulic fluid port 24 is communicated to the rodless cavity of the second oil cylinder 7, and the 5th hydraulic fluid port 25 is communicated to the rod chamber of the second oil cylinder 7, and the 6th hydraulic fluid port 26 is connected with the E mouth of hydraulic system.
As shown in Figure 10 and Figure 11, concrete pumping system of the present invention is positioned at the first working state, now hydrovalve is in state as shown in figure 10, hydraulic system is entered the hydraulic oil of certain pressure by E mouth, hydraulic oil enters the rod chamber of the first oil cylinder after the 6th hydraulic fluid port 26, the 3rd hydraulic fluid port 13.
First piston 61 moves downward the hydraulic oil of its rodless cavity by the first hydraulic fluid port 11, the 4th hydraulic fluid port 21 is pressed into the rodless cavity of the second oil cylinder 7, because the pressure of hydraulic oil is that rod chamber by the first oil cylinder imports rodless cavity into, actual internal area increases, produce pressure drop, injecting under equal volume hydraulic pressure oil condition simultaneously, inject rod chamber and can make the longer stroke of piston movement, this just makes the second piston 71 drive the concrete piston of carrying in cylinder to obtain longer stroke, simultaneously can the more concrete of pumping, the second oil cylinder 7 is in low pressure, large displacement condition, be applicable to pumping solvent or diluent, in operating on low voltage state.
The hydraulic oil of the rod chamber of the second oil cylinder 7 returns hydraulic system from D mouth after the 5th hydraulic fluid port 25, the second hydraulic fluid port 12.
As shown in Figure 12 and Figure 13, concrete pumping system of the present invention is positioned at the second working state, now hydrovalve is in state as shown in figure 12, hydraulic system is entered the hydraulic oil of certain pressure by E mouth, hydraulic oil enters the rodless cavity of the first oil cylinder after the 6th hydraulic fluid port 26, the first hydraulic fluid port 11.
First piston 61 moves upward, the hydraulic oil of its rod chamber is passed through to the 3rd hydraulic fluid port 13, the 4th hydraulic fluid port 24 is pressed into the rod chamber of the second oil cylinder 7: because the pressure of hydraulic oil is that rodless cavity by the first oil cylinder imports rod chamber into, actual internal area diminishes, the pressure of hydraulic oil increases, injecting under equal volume hydraulic pressure oil condition simultaneously, injecting rodless cavity can make the stroke of piston movement reduce, this has just reduced the second piston 71 and has driven the stroke of carrying the concrete piston movement in cylinder, reduce the discharge capacity of pump concrete, now the second oil cylinder is in high pressure, small displacement state, applicable pumping is expected firmly, in high-pressure work state.
The hydraulic oil of the second oil cylinder 7 rodless cavities returns hydraulic system from D mouth after the 4th hydraulic fluid port 24, the second hydraulic fluid port 12.
Certainly, on the valve body of hydrovalve of the present invention, a plurality of hydraulic fluid ports can also be set, as shown in Figure 14 to Figure 16, it is the situation more than three hydraulic fluid ports that is provided with on single valve body, to meet more complicated function, switch requirement, now only the phase difference of each hydraulic fluid port need be adjusted accordingly, and the structure of each hydraulic fluid port of reasonable Arrangement and oil cylinder, hydraulic system, because the principle in its principle and above-described embodiment is suitable, do not repeat them here.
The present invention also provides a kind of concrete pump, comprises the hydrovalve described in above-described embodiment or concrete pumping system.
Described concrete pumping system can be realized the switching between high low pressure working state rapidly, makes described concrete pump rapidly material thing to be transported to specified position.
Technological scheme provided by the invention has following beneficial effect:
Adopt independently high low pressure to switch hydrovalve, structure is simpler, convenient operation; Be applicable to batch production simultaneously, be applicable to the product of different model, there is very strong versatility; Hydrovalve lightweight, volume is little, can effectively reduce the overall weight of concrete pumping system and the working space taking; Hydrovalve principle is simple, and operation and maintenance is convenient, can significantly improve pumping efficiency.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a hydrovalve, it is characterized in that, comprise the first valve body (1), second valve body (2) affixed with described the first valve body (1), and be located at rotationally the spool (3) between described the first valve body (1) and described the second valve body (2), described spool (3) is provided with at least three through holes, described the first valve body (1), the second valve body is equipped with the hydraulic fluid port equating with the quantity of described through hole on (2), described through hole is for the hydraulic fluid port on described the first valve body of man-to-man connection (1) and the hydraulic fluid port on described the second valve body (2), described through hole, hydraulic fluid port is uniformly distributed around the rotary centerline of described spool (3) respectively, and the projection of the hydraulic fluid port on the hydraulic fluid port on described the first valve body (1) and described the second valve body (2) in the plane perpendicular to described rotary centerline is not overlapping, described spool (3) at least has two working positions, described spool (3) is when different working position, conducting relation between each hydraulic fluid port on each hydraulic fluid port on described the first valve body (1) and described the second valve body (2) is different.
2. hydrovalve according to claim 1, it is characterized in that, described spool (3) is cylindrical, described spool (3) can rotate around its central axis, described through hole and described central axis be arranged in parallel, on described the first valve body (1), the second valve body (2), be equipped with and described spool (3) depressed part that match, that cross section is rounded, described hydraulic fluid port is located on the bottom surface of described depressed part, the depressed part of the depressed part of described the first valve body (1) and the second valve body (2) forms cavity, and described spool (3) is located in described cavity.
3. hydrovalve according to claim 2, it is characterized in that, also comprise back shaft (4), it is upper that described spool (3) is fixedly arranged on described back shaft (4), and the two ends of described back shaft (4) are rotatably installed on respectively on described the first valve body (1) and the second valve body (2).
4. hydrovalve according to claim 3, is characterized in that:
On described spool (3), be evenly equipped with the first through hole (31), the second through hole (32) and third through-hole (33);
On described the first valve body (1), be evenly equipped with the first hydraulic fluid port (11), the second hydraulic fluid port (12) and the 3rd hydraulic fluid port (13);
On described the second valve body (2), be evenly equipped with the 4th hydraulic fluid port (24), the 5th hydraulic fluid port (25) and the 6th hydraulic fluid port (26);
Described spool (3) is when the first working position, described the first through hole (31) is communicated with described the first hydraulic fluid port (11) and described the 4th hydraulic fluid port (24), described the second through hole (32) is communicated with described the second hydraulic fluid port (12) and described the 5th hydraulic fluid port (25), and described third through-hole (33) is communicated with described the 3rd hydraulic fluid port (13) and described the 6th hydraulic fluid port (26);
Described spool (3) is when the second working position, described the first through hole (31) is communicated with described the 6th hydraulic fluid port (26) and described the first hydraulic fluid port (11), described the second through hole (32) is communicated with described the 4th hydraulic fluid port (24) and described the second hydraulic fluid port (12), and described third through-hole (33) is communicated with described the 5th hydraulic fluid port (25) and described the 3rd hydraulic fluid port (13).
5. hydrovalve according to claim 4, is characterized in that,
On described spool (3), be provided with mounting hole (30);
Described mounting hole is provided with position-limited lever in (30);
On described the first valve body (1) and described the second valve body (2), be provided with reversing groove (20);
Described position-limited lever rotates along described reversing groove (20), can control described spool (3) respectively in described the first working position and described the second working position.
6. hydrovalve according to claim 5, is characterized in that,
Described spool (3) is connected by key with described back shaft (4);
The two ends of described back shaft (4) are installed on described the first valve body (1) and the second valve body (2) by bearing respectively;
One end of described back shaft (4) connects rotary power unit, and described rotary power unit drives described back shaft (4) to rotate, and described back shaft (4) drives described spool (3) to rotate.
7. hydrovalve according to claim 6, is characterized in that,
Between described the first valve body (1) and described the second valve body (2), by flange, connect.
8. hydrovalve according to claim 1, is characterized in that, also comprises connecting screw rod,
Described connecting screw rod is successively through described the first valve body (1), spool (3) and described the second valve body (2), and the two ends of described connecting screw rod are separately installed with nut;
Or one end of described connecting screw rod is fixed on the first valve body (1) or the second valve body (2) is upper, the other end of described connecting screw rod is provided with nut.
9. a concrete pumping system, comprising:
The first oil cylinder (6) and the second oil cylinder (7), be provided with first piston (61) in described the first oil cylinder (6), be provided with first piston bar (62) on described first piston (61); In described the second oil cylinder (7), be provided with the second piston (71), on described the second piston (71), be provided with the second piston rod (72), it is characterized in that, also comprise the hydrovalve as described in any one in claim 4 to 8,
The outer end of described the first hydraulic fluid port (11) is communicated to the rodless cavity of described the first oil cylinder (6), and described the second hydraulic fluid port (12) is communicated with pressure medium source, and described the 3rd hydraulic fluid port (13) is communicated to the rod chamber of described the first oil cylinder (6);
Described the 4th hydraulic fluid port (24) is communicated to the rodless cavity of described the second oil cylinder (7), and described the 5th hydraulic fluid port (25) is communicated to the rod chamber of described the second oil cylinder (7), and described the 6th hydraulic fluid port (26) is communicated with described pressure medium source.
10. a concrete pump, is characterized in that, comprises hydrovalve or concrete pumping system claimed in claim 9 described in claim 1-8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237746.5A CN102720670B (en) | 2012-07-10 | 2012-07-10 | Hydraulic valve, concrete pumping system and concrete pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237746.5A CN102720670B (en) | 2012-07-10 | 2012-07-10 | Hydraulic valve, concrete pumping system and concrete pump |
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| Publication Number | Publication Date |
|---|---|
| CN102720670A CN102720670A (en) | 2012-10-10 |
| CN102720670B true CN102720670B (en) | 2014-12-10 |
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| CN201210237746.5A Active CN102720670B (en) | 2012-07-10 | 2012-07-10 | Hydraulic valve, concrete pumping system and concrete pump |
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| CN110905877A (en) * | 2018-09-14 | 2020-03-24 | 湖南慧盟重工科技有限公司 | Hydraulic valve, double-cylinder pumping equipment and hydraulic main valve thereof |
| CN112211277B (en) * | 2020-09-02 | 2022-06-10 | 长沙鼎知智能科技有限公司 | Alternate dirt-absorbing conveying device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483572Y (en) * | 2001-05-21 | 2002-03-27 | 西安建筑科技大学 | High/low pressure conversion device for concrete pump |
| CN102374310A (en) * | 2011-10-31 | 2012-03-14 | 中联重科股份有限公司 | High-low pressure conversion device and pumping system |
| CN202228451U (en) * | 2011-08-22 | 2012-05-23 | 中联重科股份有限公司 | High-low pressure change-over valve and concrete pumping equipment with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6446584U (en) * | 1987-09-16 | 1989-03-22 | ||
| JPH11153238A (en) * | 1997-11-21 | 1999-06-08 | From:Kk | Switching valve |
| DE10310662A1 (en) * | 2003-03-12 | 2004-09-23 | Ksb Aktiengesellschaft | Fitting for switchover of fluid path, has flow divisor with by-passes, and rotary disk-shaped steering elements that respectively sealing the axial face of the corresponding by-pass |
| KR100963557B1 (en) * | 2008-06-11 | 2010-06-15 | 한국기계연구원 | Self reciprocated energy recovery device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483572Y (en) * | 2001-05-21 | 2002-03-27 | 西安建筑科技大学 | High/low pressure conversion device for concrete pump |
| CN202228451U (en) * | 2011-08-22 | 2012-05-23 | 中联重科股份有限公司 | High-low pressure change-over valve and concrete pumping equipment with same |
| CN102374310A (en) * | 2011-10-31 | 2012-03-14 | 中联重科股份有限公司 | High-low pressure conversion device and pumping system |
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