CN213684742U - Hydraulic circuit with pressure relief circuit and hydraulic system - Google Patents
Hydraulic circuit with pressure relief circuit and hydraulic system Download PDFInfo
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- CN213684742U CN213684742U CN202022293442.3U CN202022293442U CN213684742U CN 213684742 U CN213684742 U CN 213684742U CN 202022293442 U CN202022293442 U CN 202022293442U CN 213684742 U CN213684742 U CN 213684742U
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Abstract
A hydraulic circuit having a pressure relief circuit comprising at least one hydraulic actuator and a hydraulic coupling in fluid communication with each other, characterized in that the hydraulic circuit further comprises a bypass line connecting a first port of the hydraulic actuator to a second port of the hydraulic actuator, wherein a control valve is arranged in the bypass line to selectively connect or disconnect the first port of the hydraulic actuator and the second port of the hydraulic actuator.
Description
Technical Field
The utility model relates to a hydraulic circuit and hydraulic system with pressure release return circuit.
Background
Hydraulic couplings, such as hydraulic quick-change couplings, are typically arranged in a hydraulic system to take hydraulic power from a hydraulic actuator, e.g. a hydraulic cylinder, to a working unit, e.g. a compression module.
Fig. 1 shows a prior art hydraulic circuit 10 without a pressure relief circuit, comprising at least one hydraulic actuator 11 and a hydraulic coupling 16, said at least one hydraulic actuator 11 comprising two hydraulic cylinders 11a, 11b and the hydraulic coupling 16 comprising two quick- change couplings 16a, 16 b. The rod chamber 12a of the hydraulic cylinder 11a and the rod chamber 12b of the hydraulic cylinder 11b are connected by a pipe 14a, and the rodless chamber 13a of the hydraulic cylinder 11a and the rodless chamber 13b of the hydraulic cylinder 11b are connected by a pipe 14 b. The quick-change coupling 16a is connected to the line 14a by a line 15a, and the quick-change coupling 16b is connected to the line 14b by a line 15 b.
A work unit (not shown), such as a compression module, may be in fluid communication with the hydraulic coupling 16 such that the hydraulic coupling 16 draws hydraulic power from the hydraulic actuator 11 to the compression module. In practice, when the pusher (not shown) of the compression module is retracted into position, the rod chambers 12a, 12b of the hydraulic cylinders 11a, 11b contain the working pressure of the hydraulic actuators, for example about 240bar, and therefore the operator needs to struggle to overcome this working pressure in order to connect the quick-change couplings 16a at the rod chambers of the hydraulic cylinders.
Accordingly, there is a need for an improved existing hydraulic circuit that overcomes the aforementioned disadvantages of existing hydraulic circuits.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned shortcoming that exists among the current hydraulic circuit, the utility model provides a hydraulic circuit and hydraulic system with pressure release return circuit. Utilize the utility model discloses a hydraulic circuit and hydraulic system with pressure release return circuit has realized that only need overcome less power and just can easily connect the effect that the pneumatic cylinder has the hydraulic pressure connector of pole chamber department.
The present invention proposes a hydraulic circuit with a pressure relief circuit, comprising at least one hydraulic actuator and a hydraulic coupling in fluid communication with each other, characterized in that the hydraulic circuit further comprises a bypass line connecting a first port of the hydraulic actuator to a second port of the hydraulic actuator, wherein a control valve is arranged in the bypass line to selectively connect or disconnect the first port of the hydraulic actuator and the second port of the hydraulic actuator.
In an alternative embodiment, the at least one hydraulic actuator comprises a first hydraulic cylinder and a second hydraulic cylinder, wherein the first rod chamber of the first hydraulic cylinder is connected to the second rod chamber of the second hydraulic cylinder by a first conduit and the first rodless chamber of the first hydraulic cylinder is connected to the second rodless chamber of the second hydraulic cylinder by a second conduit.
In an alternative embodiment, the first and second ports of the hydraulic actuator are first and second rodless chambers of the first and second hydraulic cylinders, respectively. When the control valve control bypass circuit is connected with the first rodless cavity of the first hydraulic cylinder and the second rodless cavity of the second hydraulic cylinder, a pressure relief circuit is formed between the rodless cavities of the two hydraulic cylinders, and pressure remained in the hydraulic actuator is released.
In an alternative embodiment, the hydraulic coupling comprises a first quick-change coupling and a second quick-change coupling, wherein the first quick-change coupling is connected to the first line by a third line and the second quick-change coupling is connected to the second line by a fourth line.
In an alternative embodiment, the control valve is a ball valve, the bypass line connecting the first port of the hydraulic actuator and the second port of the hydraulic actuator when the ball valve is open, and the bypass line disconnecting the first port of the hydraulic actuator and the second port of the hydraulic actuator when the ball valve is closed.
In an alternative embodiment, the control valve is a shut-off valve other than a ball valve, the bypass line connecting the first port of the hydraulic actuator and the second port of the hydraulic actuator when the shut-off valve is open, and the bypass line disconnecting the first port of the hydraulic actuator and the second port of the hydraulic actuator when the shut-off valve is closed.
The utility model discloses a hydraulic system is still provided, it includes the aforesaid hydraulic circuit that has the pressure release circuit to this hydraulic system further includes the work unit with hydraulic coupling fluid intercommunication, wherein, when bypass line disconnection hydraulic actuator's first port and hydraulic actuator's second port, hydraulic coupling follows at least one hydraulic actuator gets hydraulic power to the work unit.
In one embodiment, the work unit is a compression module, such as a module for compressing refuse in a refuse vehicle.
The invention may be embodied as exemplary embodiments in the drawings. It is to be noted, however, that the drawings are designed solely for purposes of illustration and that any changes which come within the teachings of the invention are intended to be embraced therein and are limited only by the scope of the invention as defined in the appended claims.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic circuit including a hydraulic actuator and a hydraulic coupling without a pressure relief circuit; and
fig. 2 is a schematic diagram of a hydraulic circuit having a pressure relief circuit according to an embodiment of the present invention.
Detailed Description
Fig. 2 shows a schematic diagram of a hydraulic circuit 20 with a pressure relief circuit according to an embodiment of the present invention. As can be seen in this figure, the hydraulic circuit 20 includes at least one hydraulic actuator 21 and a hydraulic coupling 26 in fluid communication, and the hydraulic circuit 20 further includes a bypass line 27 in fluid communication with the hydraulic actuator 21 and the hydraulic coupling 26, respectively.
The at least one hydraulic actuator 21 has a first port and a second port that can be selectively connected or disconnected by a bypass line 21.
In the embodiment shown in fig. 2, the at least one hydraulic actuator 21 comprises a first hydraulic cylinder 21a and a second hydraulic cylinder 21b, wherein a first rod chamber 22a of the first hydraulic cylinder 21a is connected to a second rod chamber 22b of the second hydraulic cylinder 21b via a first line 24a, and a first rodless chamber 23a of the first hydraulic cylinder 21a is connected to a second rodless chamber 23b of the second hydraulic cylinder 21b via a second line 24 b.
The first and second ports of the hydraulic actuator 21 may be a first rod-less chamber 23a of the first hydraulic cylinder 21a and a second rod-less chamber 23b of the second hydraulic cylinder 21b, respectively.
In the embodiment shown in fig. 2, the hydraulic coupling 26 comprises a first quick-change coupler 26a and a second quick-change coupler 26b, wherein the first quick-change coupler 26a is connected to the first line 24a by a third line 25a and the second quick-change coupler 26b is connected to the second line 24b by a fourth line 25 b.
In the embodiment shown in fig. 2, the bypass line 27 is connected to the third line 25a and the fourth line 25b, respectively, so as to be in fluid communication with the hydraulic actuator 21 and the hydraulic coupling 26, respectively, and a control valve 28 is disposed in the bypass line 27 to control the bypass line 27 to selectively connect or disconnect the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21.
When the control valve 28 controls the bypass line 27 to connect the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21, a pressure relief circuit is formed in the hydraulic actuator 21, in which case the remaining working pressure (about 240bar) at the rod chambers 22a, 22b is released, and in order to connect the quick change coupling 26a at the rod chamber of the hydraulic cylinder, only the spring force in the quick change coupling 26a needs to be overcome.
In one embodiment, the hydraulic system according to the present invention additionally comprises a working unit (not shown), such as a compression module, in fluid communication with the hydraulic coupling 26. When the control valve 28 controls the bypass line 27 to disconnect the first port of the hydraulic actuator 21 from the second port of the hydraulic actuator 21, there is no pressure relief circuit in the hydraulic circuit, at which point the hydraulic coupling 26 takes hydraulic power from the hydraulic actuator 21 to the compression module, causing the compression module to start operating. When the control valve 28 controls the bypass line 27 to connect the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21, a pressure relief circuit is formed in the hydraulic actuator 21 when the hydraulic coupling 26 does not take hydraulic power from the hydraulic actuator 21 to the compression module.
In one embodiment, the control valve 28 is a ball valve, the bypass line 27 connects the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21 when the ball valve is open, and the bypass line 27 disconnects the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21 when the ball valve is closed. The specific configuration and type of the ball valve is not particularly limited as long as the above-described operation of the bypass line 27 can be controlled.
In another embodiment, the control valve 28 is a shut-off valve of another form than a ball valve, the bypass line 27 connecting the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21 when the shut-off valve is open, and the bypass line 27 disconnecting the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21 when the shut-off valve is closed. The specific configuration and type of the shutoff valve are not particularly limited as long as the above-described operational switching of the bypass line 27 can be controlled.
The control valve 28 of the present invention may also be other devices that can control the bypass line 27 to achieve the above-described operation.
Under the condition that the work unit is compression module, utilize the utility model discloses a hydraulic circuit and hydraulic system's that have pressure release return circuit work flow as follows:
1) preparing a compression module;
2) opening the control valve 28, controlling the bypass line 27 to connect the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21, so that the rod chambers 22a, 22b and the rodless chambers 23a, 23b of the hydraulic cylinders 21a and 21b communicate, forming a pressure relief circuit in the hydraulic actuator 21, at which time the pressure at the rod chambers 22a, 22b is released;
3) the operator connects the quick- change couplings 26a, 26b, and since the pressure in the rod chambers 22a, 22b has been released, only the spring force in the quick-change coupling 26a has to be overcome in order to connect the quick-change coupling 26a in the rod chamber of the hydraulic cylinder;
4) closing the control valve 28, controlling the bypass line 27 to disconnect the first port of the hydraulic actuator 21 and the second port of the hydraulic actuator 21, so that the communication between the rod chambers 22a, 22b and the rodless chambers 23a, 23b of the hydraulic cylinders 21a and 21b is disconnected;
5) the compression module starts working.
Utilize the utility model discloses a hydraulic circuit and hydraulic system with pressure release return circuit on unchangeable main hydraulic circuit's basis, through increasing the bypass pipeline by the control valve control such as the stop valve of ball valve or other forms, realized the laborsaving quick change coupler of installation's of operating personnel work.
A possible but non-limiting embodiment of a hydraulic circuit with a pressure relief circuit according to the invention is described in detail above with the aid of the accompanying drawings. Modifications and additions to the techniques and structures, as well as re-combinations of features in various embodiments, which do not depart from the scope and spirit of the disclosure as set forth in the following claims, should be construed by those skilled in the art to which the invention pertains. Accordingly, such modifications and additions that can be envisaged under the teaching of the present invention are to be considered part of the present disclosure. The scope of the present disclosure is defined by the following appended claims, and includes equivalents known at the time of filing this disclosure and equivalents not yet foreseen.
Claims (7)
1. Hydraulic circuit (20) with pressure relief circuit comprising at least one hydraulic actuator (21) and a hydraulic coupling (26) in fluid communication with each other, characterized in that said hydraulic circuit (20) further comprises a bypass line (27) connecting a first port of said hydraulic actuator (21) to a second port of said hydraulic actuator (21), wherein a control valve (28) is arranged in said bypass line (27) to selectively connect or disconnect said first port of said hydraulic actuator (21) and said second port of said hydraulic actuator (21).
2. The hydraulic circuit (20) of claim 1, wherein the at least one hydraulic actuator (21) comprises a first hydraulic cylinder (21a) and a second hydraulic cylinder (21b), wherein a first rod chamber (22a) of the first hydraulic cylinder (21a) and a second rod chamber (22b) of the second hydraulic cylinder (21b) are connected by a first conduit (24a), and a first rodless chamber (23a) of the first hydraulic cylinder (21a) and a second rodless chamber (23b) of the second hydraulic cylinder (21b) are connected by a second conduit (24 b).
3. The hydraulic circuit (20) according to claim 2, characterized in that the hydraulic coupling (26) comprises a first quick-change coupling (26a) and a second quick-change coupling (26b), wherein the first quick-change coupling (26a) is connected to the first line (24a) by a third line (25a) and the second quick-change coupling (26b) is connected to the second line (24b) by a fourth line (25 b).
4. The hydraulic circuit (20) of any one of claims 1-3, wherein the control valve (28) is a ball valve, the bypass line (27) connects the first port of the hydraulic actuator (21) and the second port of the hydraulic actuator (21) when the ball valve is open, and the bypass line (27) disconnects the first port of the hydraulic actuator (21) and the second port of the hydraulic actuator (21) when the ball valve is closed.
5. The hydraulic circuit (20) of any one of claims 1-3, wherein the control valve (28) is a shut-off valve other than a ball valve, the bypass line (27) connecting a first port of the hydraulic actuator (21) and a second port of the hydraulic actuator (21) when the shut-off valve is open, and the bypass line (27) disconnecting the first port of the hydraulic actuator (21) and the second port of the hydraulic actuator (21) when the shut-off valve is closed.
6. Hydraulic system, characterized in that it comprises a hydraulic circuit (20) according to any one of claims 1-5, further comprising a working unit in fluid communication with the hydraulic coupling (26), wherein the hydraulic coupling (26) takes hydraulic power from the at least one hydraulic actuator (21) to the working unit when the bypass line (27) disconnects the first port of the hydraulic actuator (21) and the second port of the hydraulic actuator (21).
7. The hydraulic system of claim 6, wherein the work unit is a compression module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022293442.3U CN213684742U (en) | 2020-10-14 | 2020-10-14 | Hydraulic circuit with pressure relief circuit and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022293442.3U CN213684742U (en) | 2020-10-14 | 2020-10-14 | Hydraulic circuit with pressure relief circuit and hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684742U true CN213684742U (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022293442.3U Active CN213684742U (en) | 2020-10-14 | 2020-10-14 | Hydraulic circuit with pressure relief circuit and hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213684742U (en) |
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2020
- 2020-10-14 CN CN202022293442.3U patent/CN213684742U/en active Active
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