CN202228451U - High-low pressure change-over valve and concrete pumping device with same - Google Patents
High-low pressure change-over valve and concrete pumping device with same Download PDFInfo
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- CN202228451U CN202228451U CN2011203064399U CN201120306439U CN202228451U CN 202228451 U CN202228451 U CN 202228451U CN 2011203064399 U CN2011203064399 U CN 2011203064399U CN 201120306439 U CN201120306439 U CN 201120306439U CN 202228451 U CN202228451 U CN 202228451U
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Abstract
The utility model discloses a high-low pressure change-over valve, which comprises an upper valve body (1) and a lower valve body (2). The upper valve body (1) is rotatablely arranged on the lower valve body (2), a groove (3) is formed at the upper end of the lower valve body (2), and the lower portion of the upper valve body (1) is embedded in the groove (3). A concrete pumping device with the high-low pressure change-over valve is further provided. The high-low pressure change-over valve is better in sealing performance, and can avoid oil leakage in a high-low pressure change-over process.
Description
Technical field
The utility model relates to engineering machinery, particularly, relates to a kind of high low pressure changing valve and the concrete pumping equipment with this high low pressure changing valve.
Background technique
In building construction process; Because concrete pump needs bigger pumping pressure scope; And in the process of construction, need carry out the conversion of high pressure pumping and low pressure pumping, therefore, generally adopt the high low pressure conversion equipment to switch the delivery pressure of concrete pump.
At present, the high low pressure conversion divides three kinds of modes: 1, change the sebific duct that connects two oil cylinders and realize the high low pressure conversion; 2, adopt rotation high low pressure changing valve to change oil circuit, to realize the high low pressure conversion; 3, adopt six cartridge valves and a solenoid directional control valve to realize the automatically controlled of high low pressure conversion.
Because mode 1 inconvenient operation, dredge oil amount is bigger etc., seldom adopts at present.And mode 3 costs are higher, system complex, and rate of fault is higher, so adopt mode 2 to realize the conversion of high low pressure usually.But this mode fluid in transfer process leaks easily, and foreign to get into the high low pressure changing valve easily inner, the hydraulic system of concrete pump is caused harmful effect.
CN2627267Y discloses a kind of single valve piece high low pressure conversion equipment; This high low pressure conversion equipment comprises valve block; Wherein, said valve block side is provided with six hydraulic fluid ports, divides two row to establish three passages; The valve block end face is equipped with the end cap that can change assembly direction, and also offering on this end cap can be corresponding with the valve block upper channel and can coupled three logical passages.As shown in Figure 1, the general high low pressure changing valve that uses comprises upper valve body 1 and following valve body 2, and upper valve body 1 docks with following valve body 2 and fixes through a plurality of fastening pieces 7, and upper valve body 1 is the plane with the surface of contact of following valve body 2.Simultaneously, between upper valve body 1 and following valve body 2, be provided with second seal ring 8, this second seal ring 8 is generally two, so that the high low pressure changing valve is carried out axial seal.
When carrying out the high low pressure conversion operations, need a plurality of fastening pieces 7 all be pulled down, rotate upper valve body 1 then, make it turn to preposition, Rotate 180 ° normally, thus make the oil circuit of high low pressure changing valve change, finally realize the high low pressure conversion.In this operating process, upper valve body 1 separates with following valve body 2, and second seal ring 8 loses the effect of sealing, and the seal failure between upper valve body 1 and the following valve body 2 causes the leakage of hydraulic oil and mixing of foreign matter, causes system works unstable.
Therefore, need a kind of sealing better, the high low pressure changing valve that can avoid the fluid in the high low pressure transfer process to reveal.
The model utility content
The purpose of the utility model provides a kind of high low pressure changing valve and the concrete pumping equipment with this high low pressure changing valve, and this high low pressure changing valve sealing is better, can avoid the fluid in the high low pressure transfer process to reveal.
To achieve these goals; The one side of the utility model provides a kind of high low pressure changing valve; This high low pressure changing valve comprises upper valve body and following valve body, and said upper valve body is arranged on the said valve body down, wherein rotationally; The said upper end of valve body down is formed with groove, and the bottom of said upper valve body embeds in the said groove.
Preferably, be provided with first seal ring between the sidewall of the sidewall of the bottom of said upper valve body and the said groove of valve body down.
Preferably, be provided with second seal ring between the diapire of the diapire of the bottom of said upper valve body and the said groove of valve body down.
Preferably, the parallel sidewalls of the sidewall of the bottom of said upper valve body and the said groove of valve body down is in the center line of said upper valve body with respect to the rotation of said valve body down.
Preferably, said high low pressure changing valve also comprises gland, and this gland is detachably fixed on the said valve body down and with said upper valve body and is pressed on the said valve body down.
Preferably, said gland comprise the top and from said top to the sidepiece that extends below, fit in the upper-end surface of this top and said upper valve body, the upper-end surface applying of the lower end surface of said sidepiece and said valve body down.
Preferably, said top is provided with through hole, and said upper valve body is provided with upwardly extending operating stem, and this operating stem passes said through hole and stretches out said gland.
Preferably, said high low pressure changing valve also comprises handle, and this handle is connected with said operating stem.
Preferably, the bottom of said upper valve body has boss, and this boss is embedded in the groove of said valve body down, and said upper valve body is detachably fixed on the said valve body down.
The utility model a kind of concrete pumping equipment is provided on the other hand; This concrete pumping equipment comprises oil hydraulic pump, high low pressure changing valve, first oil cylinder, second oil cylinder and the fuel tank that is communicated with successively; Wherein, said high low pressure changing valve is a high low pressure changing valve recited above.
Pass through technique scheme; Under can embedding in the bottom of upper valve body, the high low pressure changing valve of the utility model carries out the high low pressure conversion under the state of the groove of valve body; Promptly be positioned under the state of the following groove of valve body in the bottom of upper valve body; Upper valve body can rotate with respect to following valve body, thereby the sidewall of the bottom of upper valve body cooperates with the sidewall of the groove of following valve body, makes to form radial seal between upper valve body and the following valve body; Thereby avoid upper valve body leakage of oil when down valve body rotates, reach the effect of radial seal.
The groove of the bottom of upper valve body and following valve body can form various suitable shapes; But because upper valve body all roughly forms cylindrical with following valve body; So that upper valve body can be with respect to valve body rotation down; So it is coadapted cylindrical that the groove of the bottom of upper valve body and following valve body also can form, thus the bottom of upper valve body can rotate down at the state in embedding the groove of valve body down, and the interior part of groove of valve body can play seal action under the embedding of the bottom of upper valve body.
Other feature and advantage of the utility model will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of specification, is used to explain the utility model with following embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the sectional view of the high low pressure changing valve of existing technology;
Fig. 2 is the sectional view of first mode of execution of the high low pressure changing valve of the utility model;
Fig. 3 is the plan view of first mode of execution of the high low pressure changing valve of the utility model;
Fig. 4 is the schematic representation according to the concrete pumping equipment of the utility model;
Fig. 5 is the schematic representation according to the concrete pumping equipment of the utility model;
Fig. 6 is the sectional view of second mode of execution of the high low pressure changing valve of the utility model;
Fig. 7 is the sectional view of the 3rd mode of execution of the high low pressure changing valve of the utility model; And
Fig. 8 is the sectional view of the 4th mode of execution of the high low pressure changing valve of the utility model.
Description of reference numerals
2 times valve bodies of 1 upper valve body
3 grooves, 4 first seal rings
5 glands, 6 handles
7 fastening pieces, 8 second seal rings
9 oil hydraulic pumps, 10 fuel tanks
11 operating stem, 12 boss
13 first oil cylinders, 14 second oil cylinders
51 tops, 52 sidepieces
K1, K2, K3, K4, K5, K6 hydraulic fluid port
Embodiment
Be elaborated below in conjunction with the embodiment of accompanying drawing to the utility model.Should be understood that embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
In the utility model, not do under the situation of opposite explanation, the noun of locality of use is like " upper and lower, left and right " common top, below, the left side, the right as shown in Figure 2, and " inside and outside " is inside, the outside of finger.
As shown in Figures 2 and 3; The high low pressure changing valve of the utility model, this high low pressure changing valve comprise upper valve body 1 and following valve body 2, and said upper valve body 1 is arranged on the said valve body 2 down rotationally; To realize the high low pressure conversion; Wherein, the said upper end of valve body 2 down is formed with groove 3, and the bottom of said upper valve body 1 embeds in the said groove 3.
As shown in Figure 3; The following valve body 2 of the high low pressure changing valve of the utility model is provided with six hydraulic fluid port K1-K6 with external communications; Upper valve body 1 is provided with respectively and six corresponding oil circuits of hydraulic fluid port K1-K6, and also is provided with three oil circuits in the upper valve body 1 hydraulic fluid port K1-K6 is communicated with in twos.In addition, be provided with second seal ring 8 between upper valve body 1 and the following valve body 2, this second seal ring 8 plays the radial seal effect, prevents that fluid is from leaking between upper valve body 1 and the following valve body 2.
Like Fig. 4 and shown in Figure 5; The concrete pumping equipment of the utility model; This concrete pumping equipment comprises successively the oil hydraulic pump 9 that is communicated with, high low pressure changing valve, first oil cylinder 13, second oil cylinder 14 and fuel tank 10, and wherein, said high low pressure changing valve is a high low pressure changing valve recited above.
Wherein, hydraulic fluid port K1, K2 are connected with fuel tank 10 with oil hydraulic pump 9 respectively, and hydraulic fluid port K3, K4 are communicated with the rodless cavity of first oil cylinder 13 and second oil cylinder 14 respectively, and hydraulic fluid port K5, K6 are communicated with the rod chamber of first oil cylinder 13 and second oil cylinder 14 respectively.
It is upper valve body 1 and the relation of the position between the following valve body 2 through changing the high low pressure changing valve that high low pressure switches, and changing the connected relation between each hydraulic fluid port, thereby changes the Placement of hydraulic system, realizes that pressure oil passes in and out the change of the position of oil cylinder.
When pressure oil when the rod chamber of first oil cylinder 13 gets into first oil cylinder 13 and promotes piston motions; The rodless cavity of the rodless cavity of first oil cylinder 13 and second oil cylinder 14 is communicated with through the high low pressure changing valve; Because the active area of pressure oil is less; The outlet pressure of concrete pump is less, and the rapid speed of transmission and concrete transmission, this pumping state is a low pressure pumping state; When pressure oil when the rodless cavity of first oil cylinder 13 gets into first oil cylinder 13 and promotes piston motions; The rod chamber of the rod chamber of first oil cylinder 13 and second oil cylinder 14 is communicated with through the high low pressure changing valve; Because the active area of pressure oil is bigger; The outlet pressure of concrete pump is bigger, and the speed of transmission and concrete transmission is slower, and this pumping state is a high pressure pumping state.
Shown in Figure 4 is the schematic representation of the concrete pumping equipment of low pressure pumping state, and the hydraulic fluid port K3 of high low pressure changing valve and K4, K1 and K5, K2 and K6 are communicated with respectively under the low pressure pumping state.Get into the high low pressure changing valve from the pressure oil of oil hydraulic pump 9 outputs from hydraulic fluid port K1, and, promote piston motion from the rod chamber that hydraulic fluid port K5 gets into first oil cylinder 13; Thereby pressure oil flows out from the rodless cavity of first oil cylinder 13, gets into the high low pressure changing valve through hydraulic fluid port K3, gets into the rodless cavity of second oil cylinder 14 again from hydraulic fluid port K4; Promote piston motion; Thereby pressure oil flows out from the rod chamber of second oil cylinder 14, gets into the high low pressure changing valve through hydraulic fluid port K6, flows back to fuel tank 10 from hydraulic fluid port K2 again.
Shown in Figure 5 is the schematic representation of the concrete pumping equipment of high pressure pumping state, with the upper valve body 1 of the high low pressure changing valve of position shown in Figure 4 with respect to valve body 2 Rotate 180s down °, thereby hydraulic system from low pressure pumping state exchange to high pressure pumping state.The hydraulic fluid port K5 of high low pressure changing valve and K6, K1 and K3, K2 and K4 are communicated with respectively under the high pressure pumping state.Get into the high low pressure changing valve from the pressure oil of oil hydraulic pump 9 outputs from hydraulic fluid port K1, and, promote piston motion from the rodless cavity that hydraulic fluid port K3 gets into first oil cylinder 13; Thereby pressure oil flows out from the rod chamber of first oil cylinder 13, gets into the high low pressure changing valve through hydraulic fluid port K5, gets into the rod chamber of second oil cylinder 14 again from hydraulic fluid port K6; Promote piston motion; Thereby pressure oil flows out from the rodless cavity of second oil cylinder 14, gets into the high low pressure changing valve through hydraulic fluid port K4, flows back to fuel tank 10 from hydraulic fluid port K2 again.
Under can embedding in the bottom of upper valve body 1, the high low pressure changing valve of the utility model carries out the high low pressure conversion under the state of the groove 3 of valve body 2; Promptly be positioned under the state of the following groove 3 of valve body 2 in the bottom of upper valve body 1; Upper valve body 1 can be with respect to valve body 2 rotations down; Thereby the sidewall of the bottom of upper valve body 1 cooperates with the sidewall of the groove 3 of following valve body 2; Make to form radial seal between upper valve body 1 and the following valve body 2, thereby avoid upper valve body 1 leakage of oil when down valve body 2 rotates, reach the effect of radial seal.
The groove 3 of the bottom of upper valve body 1 and following valve body 2 can form various suitable shapes; But because upper valve body 1 all roughly forms cylindrical with following valve body 2; So that upper valve body 1 can be with respect to valve body 2 rotations down; So the groove 3 of the bottom of upper valve body 1 and following valve body 2 also can form coadapted cylindrical; Thereby the bottom of upper valve body 1 can be rotated down at the state in embedding the groove 3 of valve body 2 down, and the groove 3 interior parts of valve body 2 can play seal action under the embedding of the bottom of upper valve body 1.
In order to strengthen the sealing effect between upper valve body 1 and the following valve body 2, shown in Fig. 2 and 6-8, preferably, be provided with first seal ring 4 between the sidewall of the sidewall of the bottom of said upper valve body 1 and the said groove 3 of valve body 2 down.Seal owing to can cooperate through form fit or size between the sidewall of the bottom of upper valve body 1 and the sidewall of the groove 3 of following valve body 2; But in order to reach more desirable sealing effect; Between the sidewall of the groove 3 of the sidewall of the bottom of upper valve body 1 and following valve body 2, first seal ring 4 is set, to reach better radial seal effect.This first seal ring 4 can adopt various types of seal rings, and for example V-shaped seal ring, O RunddichtringO and y-type seal ring etc. all can as long as can reach the better seal effect.First seal ring 4 can be provided with one and also can be provided with a plurality ofly, when a plurality of first seal ring 4 is set, can a plurality of first seal rings 4 be separately positioned on the diverse location between the sidewall of groove 3 of sidewall and following valve body 2 of bottom of upper valve body 1.
The installation of first seal ring 4 and setting for ease preferably, has seal groove on the sidewall of the bottom of said upper valve body 1 and/or on the sidewall of the said groove 3 of valve body 2 down, and said first seal ring 4 is arranged in the said seal groove.
First mode of execution and the 3rd mode of execution like the high low pressure changing valve of Fig. 2 and the utility model shown in Figure 7; The sidewall of the groove 3 of following valve body 2 is provided with seal groove; First seal ring 4 is contained in the sealing groove, thereby the connection between upper valve body 1 and the following valve body 2 is sealed.
Second mode of execution and the 4th mode of execution like the high low pressure changing valve of Fig. 6 and the utility model shown in Figure 8; The sidewall of the bottom of upper valve body 1 is provided with seal groove; First seal ring 4 is contained in the sealing groove, thereby the connection between upper valve body 1 and the following valve body 2 is sealed.
In addition, also can on the sidewall of the groove 3 of the sidewall of the bottom of upper valve body 1 and following valve body 2, corresponding seal groove be set respectively, first seal ring 4 is contained in the corresponding seal groove, thereby the connection between upper valve body 1 and the following valve body 2 is sealed.
When a plurality of first seal ring 4 was set, a plurality of first seal rings 4 can adopt with a kind of mode and be provided with, and also can adopt different modes to be provided with respectively, as long as can reach the better seal effect.
In order further to strengthen the sealing effect between upper valve body 1 and the following valve body 2, shown in Fig. 2-8, preferably, be provided with second seal ring 8 between the diapire of the diapire of the bottom of said upper valve body 1 and the said groove 3 of valve body 2 down.4 pairs of upper valve bodies of first seal ring 1 carry out radial seal with following valve body 2, and 8 pairs of upper valve bodies of second seal ring 1 carry out axial seal with following valve body 2, thereby reach the effect of double seal, better tightness.
Likewise, second seal ring 8 can adopt various types of seal rings, and for example V-shaped seal ring, O RunddichtringO and y-type seal ring etc. all can as long as can reach the better seal effect.Second seal ring 8 can be provided with one and also can be provided with a plurality ofly, when a plurality of second seal ring 4 is set, can a plurality of second seal rings 4 be separately positioned on the diverse location between the diapire of groove 3 of diapire and following valve body 2 of bottom of upper valve body 1.
Because the sidewall of the bottom of upper valve body 1 can be conical with the sidewall of the groove 3 of following valve body 2, also can be columniform, as long as can relatively rotate between upper valve body 1 and the following valve body 2.Shown in Fig. 2 and 6-8, preferably, the center line that the parallel sidewalls of the sidewall of the bottom of said upper valve body 1 and the said groove 3 of valve body 2 is down rotated with respect to said valve body 2 down in said upper valve body 1.The diapire of the groove 3 of the diapire of the sidewall of the groove 3 of the sidewall of the bottom of upper valve body 1 and following valve body 2 and the bottom of upper valve body 1 and following valve body 2 is vertical like this, can better carry out radial seal, and sealing effect is better.
Conversion between the low pressure pumping state of high low pressure changing valve and the high pressure pumping state for ease; Like Fig. 2 and shown in Figure 6; Preferably, said high low pressure changing valve also comprises gland 5, and this gland 5 is detachably fixed on the said valve body 2 down and with said upper valve body 1 and is pressed on the said valve body 2 down.Gland 5 can removably be connected with following valve body 2 through modes such as clamping, fastening piece connections, simultaneously upper valve body 1 is pressed to down valve body 2, makes both connect closely, avoids leakage of oil.
When the high low pressure changing valve need carry out the conversion between low pressure pumping state and the high pressure pumping state; Gland 5 is taken apart from following valve body 2, can gland 5 be pulled down, also can only tear gland 5 open pine; Make and to relatively rotate between upper valve body 1 and the following valve body 2; Thereby upper valve body 1 with respect to behind following valve body 2 Rotate 180s °, is installed to down gland 5 in the valve body 2 again, accomplishes high low pressure conversion.
At upper valve body 1 with respect in following valve body 2 rotating process; Rotate in the groove 3 of following valve body 2 bottom of upper valve body 1; The diapire of the bottom of upper valve body 1 should not surpass the height that first seal ring 4 is provided with, thereby first seal ring 4 can be brought into play seal action, avoids seal failure.When a plurality of first seal ring 4 was set at diverse location, the diapire of the bottom of upper valve body 1 should not surpass the height of first seal ring 4 of extreme higher position, otherwise sealing will lose efficacy, can cause the fluid leakage.
Removably connecting between gland 5 and the following valve body 2 for ease, like Fig. 2 and shown in Figure 6, preferably, said gland 5 is fastened on the said valve body 2 down through fastening piece 7.Fastening piece 7 is employing bolt or screw etc. usually, when carrying out the high low pressure conversion, fastening piece 7 is back-outed from following valve body 2, thereby discharged the connection between upper valve body 1 and the following valve body 2, so that upper valve body 1 is with respect to valve body 2 rotations down.In addition, through the fastening force between fastening piece 7 and the following valve body 2, can upper valve body 1 and following valve body 2 between fixing.
For the ease of between gland 5 and the following valve body 2 be connected and upper valve body 1 and following valve body 2 between fastening; Like Fig. 2 and shown in Figure 6; Preferably; Said gland 5 comprise top 51 and from said top 51 to the sidepiece that extends below 52, fit with the upper-end surface of said upper valve body 1 in this top 51, the upper-end surface applying of the lower end surface of said sidepiece 52 and said valve body 2 down.Fastening piece 7 passes with following valve body 2 fastening from the sidepiece 52 of gland 5, make the simple in structure, firm of high low pressure changing valve.The top 51 of gland 5 fits tightly with the upper-end surface of upper valve body 1, upper valve body 1 is exerted pressure with the fastening force of gland 5 through fastening piece 7, thereby makes upper valve body 1 and following valve body 2 compression fit, prevents the fluid leakage.
Operate upper valve body 1 for ease, make upper valve body 1 with respect to valve body 2 rotations down, like Fig. 2 and shown in Figure 6; Preferably; Said top 51 is provided with through hole, and said upper valve body 1 is provided with upwardly extending operating stem 11, and this operating stem 11 passes said through hole and stretches out said gland 5.Perforate on the top 51 of gland 5, through hole can be different shape, as long as operating stem 11 can pass easily, make the upper end of operating stem 11 stretch out gland 5, thereby operating operation bar 11 can rotate upper valve body 1 easily, makes the high low pressure conversion operations convenient.Operating stem 11 can be removably connect (for example being threaded or clamping) with upper valve body 1, and in the time need not carrying out the high low pressure conversion operations, operating stem 11 can disassemble from upper valve body 1; Also can be for being fixedly connected (for example welding, bonding or one-body molded) with upper valve body 1.Operating stem 11 can form different shape and structure, and for example along linearly extended bar or crooked bar, it can extend straight up, also can tilt to extend upward, and all can as long as can rotate upper valve body 1 easily.When carrying out the high low pressure conversion operations, operating operation bar 11 (for example the rotating operation bar 11) makes upper valve body 1 rotate, thereby accomplishes the high low pressure conversion operations.
In order to further facilitate operation upper valve body 1, like Fig. 2 and shown in Figure 6, preferably, said high low pressure changing valve also comprises handle 6, and this handle 6 is connected with said operating stem 11.Handle 6 can be various common structures, for example the bar of along continuous straight runs extension.Handle 6 can be removably connect (for example being threaded or clamping) with operating stem 11, and in the time need not carrying out the high low pressure conversion operations, handle 6 can disassemble from operating stem 11; Handle 6 also can be for being fixedly connected (for example welding, bonding or one-body molded with upper valve body 1) with operating stem 11.Operating stem 11 tops are formed with through hole, so that handle 6 passes and is connected with operating stem 11.Be that center handle with sleeve 6 can make upper valve body 1 rotate like this with the through hole, easy to operate, laborsaving.
In order to simplify the structure of high low pressure changing valve, like Fig. 7 and shown in Figure 8, preferably, the bottom of said upper valve body 1 has boss 12, and this boss 12 is embedded in the groove 3 of said valve body 2 down, and said upper valve body (1) is detachably fixed on the said valve body (2) down.The 3rd mode of execution and the 4th mode of execution of the high low pressure changing valve of the utility model are not provided with gland 5; And the bottom of upper valve body 1 is formed with boss 12; Upper valve body 1 cooperatively interacts with following valve body 2; Boss 12 is embedded in the groove 3 of following valve body 2, forms radial seal between the sidewall of the sidewall of boss 12 and groove 3, seals thereby on the sidewall of the sidewall of boss 12 and/or groove 3, first seal ring 4 is set.
Removably connecting between upper valve body 1 and the following valve body 2 for ease, like Fig. 7 and shown in Figure 8, preferably, said upper valve body 1 is fastened on the said valve body 2 down through fastening piece 7.Fastening piece 7 is employing bolt or screw etc. usually, when carrying out the high low pressure conversion, fastening piece 7 is back-outed from following valve body 2, thereby discharged the connection between upper valve body 1 and the following valve body 2, so that upper valve body 1 is with respect to valve body 2 rotations down.In addition, through the fastening force between fastening piece 7 and the following valve body 2, can be with fixing between upper valve body 1 and the following valve body 2.
Because the boss 12 of upper valve body 1 and the groove 3 of following valve body 2 can be conical, also can be columniform, as long as can relatively rotate between upper valve body 1 and the following valve body 2.Like Fig. 7 and shown in Figure 8, preferably, said boss 12 is the cylindrical of coupling each other with said groove 3.The diapire of the groove 3 of the diapire of the sidewall of the groove 3 of the sidewall of the boss 12 of upper valve body 1 and following valve body 2 and the boss 12 of upper valve body 1 and following valve body 2 is vertical like this, can better carry out radial seal, and sealing effect is better.Simultaneously, upper valve body 1 is more convenient, flexible with respect to the rotation of following valve body 2.When carrying out the high low pressure conversion; The boss 12 of upper valve body 1 rotates in the groove 3 of following valve body 2; And the diapire of the boss 12 of upper valve body 1 is no more than the height that first seal ring 4 is provided with, thereby first seal ring 4 can be brought into play seal action, plays the effect that prevents that fluid from revealing.
In the 3rd mode of execution and the 4th mode of execution of the high low pressure changing valve of the utility model, operate upper valve body 1 for ease and rotate, preferably, be connected with handle 6 (not shown) on the said upper valve body 1.Handle 6 can be various common structures, for example the bar of along continuous straight runs extension.Handle 6 can adopt variety of way to be connected with upper valve body 1, for example welding, bonding or one-body molded with upper valve body 1, and handle with sleeve 6 can make upper valve body 1 rotate, and is easy to operate, laborsaving.
Another aspect as the utility model; The concrete pumping equipment of the utility model can adopt the high low pressure changing valve of the combination of above-described any embodiment and each mode of execution, and it also belongs to the scope of being protected of the utility model.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned mode of execution; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technological scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove in addition; Each concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (10)
1. high low pressure changing valve; This high low pressure changing valve comprises upper valve body (1) and following valve body (2); Said upper valve body (1) is arranged on the said valve body (2) down rotationally; It is characterized in that the said upper end of valve body (2) down is formed with groove (3), the bottom of said upper valve body (1) embeds in the said groove (3).
2. high low pressure changing valve according to claim 1 is characterized in that, is provided with first seal ring (4) between the sidewall of the sidewall of the bottom of said upper valve body (1) and the said groove (3) of valve body (2) down.
3. high low pressure changing valve according to claim 2 is characterized in that, is provided with second seal ring (8) between the diapire of the diapire of the bottom of said upper valve body (1) and the said groove (3) of valve body (2) down.
4. high low pressure changing valve according to claim 1 is characterized in that, the center line that the parallel sidewalls of the sidewall of the bottom of said upper valve body (1) and the said groove (3) of valve body (2) is down rotated with respect to said valve body (2) down in said upper valve body (1).
5. according to any described high low pressure changing valve among the claim 1-4; It is characterized in that; This high low pressure changing valve also comprises gland (5), and this gland (5) is detachably fixed to said valve body (2) down and upward and with said upper valve body (1) is pressed on the said valve body (2) down.
6. high low pressure changing valve according to claim 5; It is characterized in that; Said gland (5) comprise top (51) and from said top (51) to the sidepiece that extends below (52); Fitting with the upper-end surface of said upper valve body (1) in this top (51), fits in the lower end surface of said sidepiece (52) and the said upper-end surface of valve body (2) down.
7. high low pressure changing valve according to claim 6 is characterized in that, said top (51) are provided with through hole, and said upper valve body (1) is provided with upwardly extending operating stem (11), and this operating stem (11) passes said through hole and stretches out said gland (5).
8. high low pressure changing valve according to claim 7 is characterized in that, this high low pressure changing valve also comprises handle (6), and this handle (6) is connected with said operating stem (11).
9. according to any described high low pressure changing valve among the claim 1-4; It is characterized in that; The bottom of said upper valve body (1) has boss (12), and this boss (12) is embedded in the groove (3) of said valve body (2) down, and said upper valve body (1) is detachably fixed on the said valve body (2) down.
10. concrete pumping equipment; This concrete pumping equipment comprises oil hydraulic pump (9), high low pressure changing valve, first oil cylinder (13), second oil cylinder (14) and the fuel tank (10) that is communicated with successively; It is characterized in that said high low pressure changing valve is according to any described high low pressure changing valve among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203064399U CN202228451U (en) | 2011-08-22 | 2011-08-22 | High-low pressure change-over valve and concrete pumping device with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203064399U CN202228451U (en) | 2011-08-22 | 2011-08-22 | High-low pressure change-over valve and concrete pumping device with same |
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| CN202228451U true CN202228451U (en) | 2012-05-23 |
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| CN2011203064399U Expired - Lifetime CN202228451U (en) | 2011-08-22 | 2011-08-22 | High-low pressure change-over valve and concrete pumping device with same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720670A (en) * | 2012-07-10 | 2012-10-10 | 三一重工股份有限公司 | Hydraulic valve, concrete pumping system and concrete pump |
| CN102748338A (en) * | 2012-07-25 | 2012-10-24 | 中联重科股份有限公司 | Rotary valve and dual-cylinder pumping equipment |
| 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 |
-
2011
- 2011-08-22 CN CN2011203064399U patent/CN202228451U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720670A (en) * | 2012-07-10 | 2012-10-10 | 三一重工股份有限公司 | Hydraulic valve, concrete pumping system and concrete pump |
| CN102720670B (en) * | 2012-07-10 | 2014-12-10 | 三一汽车制造有限公司 | Hydraulic valve, concrete pumping system and concrete pump |
| CN102748338A (en) * | 2012-07-25 | 2012-10-24 | 中联重科股份有限公司 | Rotary valve and dual-cylinder pumping equipment |
| CN102748338B (en) * | 2012-07-25 | 2014-12-24 | 中联重科股份有限公司 | Rotary valve and dual-cylinder pumping equipment |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |