CN212202685U - External control type counter valve - Google Patents
External control type counter valve Download PDFInfo
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- CN212202685U CN212202685U CN202020720728.2U CN202020720728U CN212202685U CN 212202685 U CN212202685 U CN 212202685U CN 202020720728 U CN202020720728 U CN 202020720728U CN 212202685 U CN212202685 U CN 212202685U
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Abstract
The utility model relates to an external control formula counter valve, including external control formula valve body and liquid accuse counter valve, the right-hand member face cartridge of external control formula valve body has liquid accuse counter valve, is equipped with P on the first mounting surface of external control formula valve body1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1An oil port, a second mounting surface is provided with a P2Oil port, TA2Oil port, TB2Oil port, A2Oil port, B2The hydraulic control counter valve comprises an oil inlet cavity I, an oil outlet cavity O and a control cavity X, the left end surface of the external control valve body is provided with an external control port B1The oil port is communicated with an oil inlet cavity I, A1Oil port and A2Oil ports are communicated with each other P1Oil port and P2Oil ports are communicated with each other, TA1Oil port and TA2Oil ports are communicated with each other, TB1Oil port and TB2The oil ports are communicated with each other, B2The oil port is communicated with the oil outlet cavity O; compared with the prior art, the utility model, establish to outer accuse oil feed through the oil feed mode with counter valve control chamber X, the pressurize does not receive the influence of internal leakage, and installation, easy maintenance.
Description
[ technical field ]
The utility model belongs to the technical field of the hydraulic pressure part technique and specifically relates to an external control formula counter valve for vertical rubber and plastic mechanical return circuit.
[ background art ]
As shown in fig. 1, a circuit using the prior art is provided before the improvement of the present invention. When the second reversing valve 11 is switched to the left position, hydraulic oil enters the upper cavity of the second oil cylinder 13 through the second check valve 14 to push the piston rod of the second oil cylinder 13 to move downwards, and the hydraulic oil in the lower cavity of the second oil cylinder 13 overflows and returns to the oil tank through the second counter valve 12; when the upper die and the lower die at the front end of the piston rod are closed, the reversing valve returns to the middle position, and pressure maintaining is formed between the second check valve 14 and the upper cavity of the second oil cylinder 13; as shown in fig. 2, since the inside of the oil port a2 is communicated with the control chamber X of the second counter valve 12, and the inside of the second counter valve 12 is of a slide valve structure, the control chamber X of the second counter valve 12 and the oil outlet chamber O are not completely sealed, and internal leakage occurs, which causes pressure drop between the second check valve 14 and the upper chamber of the second oil cylinder 13, resulting in poor pressure maintaining effect; when the injection pressure of the mold is applied, a gap is generated between the upper mold and the lower mold due to the injection pressure of the injection port, which causes poor molding of plastic, and if the generated gap is too large, a safety accident may be caused.
[ contents of utility model ]
The utility model aims at solving foretell not enough and provide an outer accuse formula counter valve, establish to outer accuse oil feed through the oil feed mode with counter valve control chamber X to the pressurize does not receive the influence of internal leakage, and installation, easy maintenance have solved among the prior art because the internal leakage leads to the not good problem of pressurize effect.
The external control type counter valve comprises an external control type valve body 1 and a hydraulic control counter valve 2, wherein a threaded cavity hole is formed in the right end face of the external control type valve body 1, the hydraulic control counter valve 2 is inserted into the threaded cavity hole, and the external control type valve body 1 is provided with two mounting surfacesA first mounting surface positioned on the front surface and a second mounting surface positioned on the back surface respectively, wherein the first mounting surface is provided with a P1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1An oil port, the second mounting surface is provided with P2Oil port, TA2Oil port, TB2Oil port, A2Oil port, B2The hydraulic control counter valve 2 comprises an oil inlet cavity I, an oil outlet cavity O and a control cavity X, an outer control port 3 is arranged on the left end face of the outer control type valve body 1, the outer control port 3 is an inlet of pilot oil in the control cavity X of the hydraulic control counter valve 2, and B1The oil port is communicated with an oil inlet cavity I, A1Oil port and A2The oil ports are communicated with each other, the P1Oil port and P2The oil ports are communicated with each other, TA1Oil port and TA2The oil ports are communicated with each other, TB1Oil port and TB2The oil ports are communicated with each other, B2The oil port is communicated with the oil outlet cavity O.
Preferably, said P is1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1The oil ports are provided with sealing ring grooves, and sealing rings are arranged in the sealing ring grooves.
Preferably, the first mounting surface of the external control valve body 1 is provided with a mounting hole 5, the mounting hole 5 penetrates through the external control valve body 1, and the mounting hole 5 communicates the first mounting surface and the second mounting surface so as to facilitate overlapping mounting.
Preferably, a process hole 4 is formed in the second mounting surface of the external control valve body 1, and the process hole 4 is communicated with the external control port 3 and the control cavity X of the hydraulic control counter valve 2.
Preferably, a control cavity X of the hydraulic control counter valve 2 is connected with the lower end of a one-way valve 24, pilot pressure of the cavity X of the hydraulic control counter valve 2 is introduced from the lower end of the one-way valve 24 through an external control port 3, the upper end of the one-way valve 24 is connected with an upper cavity of an oil cylinder 23, a lower cavity of the oil cylinder 23 is connected with an oil inlet cavity I of the hydraulic control counter valve 2, the lower end of the one-way valve 24 and an oil outlet cavity O of the hydraulic control counter valve 2 are connected with a reversing valve 21, and hydraulic oil in the lower cavity of the oil cylinder 23 overflows and returns to an oil tank.
Preferably, the threaded cavity hole of the external control valve body 1 is formed by machining with a forming cutter.
Compared with the prior art, the utility model, have following advantage:
(1) the utility model discloses outer accuse formula valve body is provided with outer accuse mouth, and the oil feed mode of liquid accuse counter valve control chamber X is established to outside oil feed to the pressurize no longer receives the control chamber X of liquid accuse counter valve and goes out the inner leakage influence of oil chamber O, and then can play the long-time locking effect to the hydro-cylinder piston;
(2) the utility model is very convenient to install and maintain, can reduce the design strength, save the installation space and reduce the material cost;
(3) the valve composed of the external control type valve body and the hydraulic control counter valve has simple structure, and the threaded cavity hole of the external control type valve body is processed by adopting the forming cutter, so that the valve cavity and the plug-in are well matched in a sealing way, thereby playing a role of reducing leakage;
to sum up, the utility model discloses establish the oil feed mode of counter valve control chamber X into outer accuse oil feed to the pressurize does not receive the influence of internal leakage, and installation, easy maintenance have solved among the prior art because the internal leakage leads to the not good problem of pressurize effect.
[ description of the drawings ]
FIG. 1 is a schematic diagram of an embodiment of a prior art application;
FIG. 2 is a prior art internal flow diagram of a valve body;
fig. 3 is a front view of the present invention;
fig. 4 is a rear view of the present invention;
fig. 5 is a left side schematic view of the present invention;
FIG. 6 is a flow passage diagram of the external control valve body of the present invention;
FIG. 7 is a schematic diagram of an embodiment of the present invention;
in the figure: 1. the hydraulic control valve comprises an external control type valve body 2, a hydraulic control counter valve 3, an external control port 4, a fabrication hole 5, a mounting hole 11, a second reversing valve 12, a second counter valve 13, a second oil cylinder 14, a second check valve 21, a reversing valve 23, an oil cylinder 24 and a check valve.
[ detailed description of the invention ]
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawing, the utility model provides an external control formula counter balance valve, including external control formula valve body 1 and liquid accuse counter balance valve 2, the right-hand member face of external control formula valve body 1 is equipped with a screw thread chamber hole, and this screw thread chamber hole adopts the shaping sword processing to form, and 2 cartridges of liquid accuse counter balance valve are in the screw thread chamber hole, and external control formula valve body 1 has two installation faces, is located positive first installation face and is located the second installation face at the back respectively, is equipped with P on the first installation face1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1An oil port, a second mounting surface is provided with a P2Oil port, TA2Oil port, TB2Oil port, A2Oil port, B2The hydraulic control counter valve 2 comprises an oil inlet cavity I, an oil outlet cavity O and a control cavity X, an outer control port 3 is arranged on the left end face of the outer control type valve body 1, and the outer control port 3 is used as an inlet of pilot oil of the control cavity X of the hydraulic control counter valve 2; as shown in FIG. 6, B of the external control type valve body 11The oil port is communicated with an oil inlet cavity I of the hydraulic control counter valve 2, A1Oil port and A2Oil ports are communicated with each other P1Oil port and P2Oil ports are communicated with each other, TA1Oil port and TA2Oil ports are communicated with each other, TB1Oil port and TB2The oil ports are communicated with each other, B2The oil port is communicated with an oil outlet cavity O of the hydraulic control counter valve 2, and the outer control port 3 is communicated with a control cavity X of the hydraulic control counter valve 2 through a process hole 4 to provide pilot oil.
Wherein, P1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1The oil ports are provided with sealing ring grooves, and sealing rings are arranged in the sealing ring grooves so as to facilitate superposition and sealing; the first mounting surface of the external control type valve body 1 is provided with mounting holes 5, for example, four mounting holes 5 can be arranged, the four mounting holes 5 penetrate through the external control type valve body 1, and the mounting holes 5 are communicated with the first mounting surface and the second mounting surface, so that the external control type valve body 1 is convenient to mount in a superposed manner; a process hole 4 is arranged on the second mounting surface of the external control type valve body 1, the process hole 4 is communicated with the external control port 3 and a control cavity X of the hydraulic control counter valve 2, and the external control type valve body is normally covered by the process hole 4And (4) blocking. The control cavity X of the hydraulic control counter valve 2 is connected with the lower end of the one-way valve 24, the pilot pressure of the cavity X of the hydraulic control counter valve 2 is introduced from the lower end of the one-way valve 24 through the outer control port 3, the upper end of the one-way valve 24 is connected with the upper cavity of the oil cylinder 23, the lower cavity of the oil cylinder 23 is connected with the oil inlet cavity I of the hydraulic control counter valve 2, the lower end of the one-way valve 24 and the oil outlet cavity O of the hydraulic control counter valve 2 are connected with the reversing valve 21, and the hydraulic oil in the lower cavity of the oil.
The present invention is further illustrated by the following examples.
Fig. 7 shows a hydraulic circuit of an external control type counter balance valve 2 to which the present invention is applied. In the circuit, the pilot pressure of a control cavity X of the pilot-controlled counter-balance valve 2 is externally connected with the lower end of a one-way valve 24; when the reversing valve 21 is switched to the left position, hydraulic oil enters the upper cavity of the oil cylinder 23 through the one-way valve 24 to push the piston rod of the oil cylinder 23 to move downwards, and the hydraulic oil in the lower cavity of the oil cylinder 23 overflows and returns to the oil tank through the hydraulic control counter valve 2; when the upper die and the lower die at the front end of the piston rod of the oil cylinder 23 are closed, the reversing valve 21 returns to the middle position, and pressure maintaining is formed between the upper cavity of the oil cylinder 23 and the one-way valve 24; the pilot pressure of the X cavity of the hydraulic control counter valve 2 is introduced from the lower end of the one-way valve 24 through the external control port 3, and the pressure maintaining of the upper cavities of the one-way valve 24 and the oil cylinder 23 is not influenced by the leakage of the X cavity and the O cavity of the external control counter valve 2 any more; when injection pressure exists between the upper die and the lower die, the injection pressure of the ejection port does not cause the upper die and the lower die to generate a gap any more, so that the reject ratio of plastic molding is reduced, and the risk of safety accidents is further reduced.
The present invention is not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the protection scope of the present invention.
Claims (6)
1. An externally controlled counterbalance valve, characterized in that: the anti-collision valve comprises an external control type valve body (1) and a hydraulic control counter valve (2), wherein a threaded cavity hole is formed in the right end face of the external control type valve body (1), the hydraulic control counter valve (2) is inserted into the threaded cavity hole, and the external control type valve body (1) is provided with two installation holesThe surface comprises a first mounting surface positioned on the front surface and a second mounting surface positioned on the back surface, and the first mounting surface is provided with a P1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1An oil port, the second mounting surface is provided with P2Oil port, TA2Oil port, TB2Oil port, A2Oil port, B2The hydraulic control counter valve (2) comprises an oil inlet cavity I, an oil outlet cavity O and a control cavity X, an outer control port (3) is arranged on the left end face of the outer control type valve body (1), the outer control port (3) is an inlet for pilot oil in the control cavity X of the hydraulic control counter valve (2), and B is an inlet for pilot oil in the control cavity X of the hydraulic control counter valve (2)1The oil port is communicated with an oil inlet cavity I, A1Oil port and A2The oil ports are communicated with each other, the P1Oil port and P2The oil ports are communicated with each other, TA1Oil port and TA2The oil ports are communicated with each other, TB1Oil port and TB2The oil ports are communicated with each other, B2The oil port is communicated with the oil outlet cavity O.
2. The externally controlled counterbalance valve according to claim 1, wherein: the P is1Oil port, TA1Oil port, TB1Oil port, A1Oil port, B1The oil ports are provided with sealing ring grooves, and sealing rings are arranged in the sealing ring grooves.
3. The externally controlled counterbalance valve according to claim 1, wherein: the external control type valve is characterized in that a first mounting surface of the external control type valve body (1) is provided with a mounting hole (5), the mounting hole (5) penetrates through the external control type valve body (1), and the mounting hole (5) is communicated with the first mounting surface and the second mounting surface so as to be conveniently stacked and mounted.
4. The externally controlled counterbalance valve according to claim 1, wherein: and a process hole (4) is formed in the second mounting surface of the external control type valve body (1), and the process hole (4) is communicated with the external control port (3) and a control cavity X of the hydraulic control counter valve (2).
5. The externally controlled counterbalance valve according to any one of claims 1 to 4, wherein: the lower extreme of check valve (24) is connected to the control chamber X of pilot operated counterbalance valve (2), the X chamber pilot pressure of pilot operated counterbalance valve (2) is introduced through outer accuse mouth (3) from the lower extreme of check valve (24), the epicoele of hydro-cylinder (23) is connected to check valve (24) upper end, the oil feed chamber I of pilot operated counterbalance valve (2) is connected to hydro-cylinder (23) cavity of resorption, the switching-over valve (21) is connected to check valve (24) lower extreme and pilot operated counterbalance valve (2) play oil chamber O, the hydraulic oil of hydro-cylinder (23) lower chamber overflows through pilot operated counterbalance valve (2), switching-over valve (21) and returns the oil tank.
6. The externally controlled counterbalance valve according to claim 5, wherein: the threaded cavity hole of the external control valve body (1) is formed by machining a forming cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020720728.2U CN212202685U (en) | 2020-05-06 | 2020-05-06 | External control type counter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020720728.2U CN212202685U (en) | 2020-05-06 | 2020-05-06 | External control type counter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202685U true CN212202685U (en) | 2020-12-22 |
Family
ID=73831851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020720728.2U Active CN212202685U (en) | 2020-05-06 | 2020-05-06 | External control type counter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202685U (en) |
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2020
- 2020-05-06 CN CN202020720728.2U patent/CN212202685U/en active Active
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