CN210050128U - Double-acting multistage hydraulic cylinder with built-in additional oil way - Google Patents
Double-acting multistage hydraulic cylinder with built-in additional oil way Download PDFInfo
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- CN210050128U CN210050128U CN201920231795.5U CN201920231795U CN210050128U CN 210050128 U CN210050128 U CN 210050128U CN 201920231795 U CN201920231795 U CN 201920231795U CN 210050128 U CN210050128 U CN 210050128U
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- 239000003921 oil Substances 0.000 claims abstract description 189
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 42
- 230000010354 integration Effects 0.000 claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
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Abstract
The utility model discloses a two effect multistage pneumatic cylinders of built-in extra oil circuit belongs to multistage pneumatic cylinder technical field, include: the cylinder comprises a cylinder bottom, a first cylinder barrel, a second cylinder barrel, a third cylinder barrel, a piston rod, a first integrated valve and a second integrated valve; the second cylinder is coaxially sleeved in the first cylinder; the third cylinder is coaxially sleeved in the second cylinder; the piston rod is sleeved in the third cylinder barrel; the first integration valve is used for enabling hydraulic oil to freely flow into the inner cavity of the piston rod from a pipeline connected with hydraulic equipment on the driven platform; the second integration valve is used for enabling hydraulic oil to freely flow into an inner cavity of the third cylinder barrel from an oil pipe; the utility model discloses can be applied to the reliability and require higher little mounting dimension, do not have the operating mode under water that exposes the cable, no hose connection, and provide hydraulic power for being driven the hydraulic equipment on the platform through arranging extra oil circuit in multistage hydraulic cylinder.
Description
Technical Field
The utility model belongs to the technical field of multistage pneumatic cylinder, concretely relates to two effect multistage pneumatic cylinders of built-in extra oil circuit.
Background
The existing underwater operation platform adopts a single-stage hydraulic cylinder originally as a telescopic driving device, an oil supply pipeline is an external hose, and when the hydraulic cylinder is linked with a driven platform to stretch, the hydraulic cylinder is retracted by the aid of a drag chain to assist the oil supply hose.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a two effect multistage pneumatic cylinders of built-in extra oil circuit can be applied to the reliability and require higher little mounting dimension, do not have the cable that exposes, the operating mode under water of no hose connection, and provide hydraulic power for being driven the hydraulic equipment on the platform through arranging extra oil circuit in multistage pneumatic cylinder.
The utility model discloses a realize through following technical scheme:
a double acting multi-stage hydraulic cylinder with an additional oil circuit built in, comprising: the cylinder comprises a cylinder bottom, a first cylinder barrel, a second cylinder barrel, a third cylinder barrel, a piston rod, a first integrated valve and a second integrated valve;
the first cylinder barrel, the second cylinder barrel and the third cylinder barrel are all barrel bodies with openings at two ends;
one end of the first cylinder barrel closes the opening end of the first cylinder barrel through the cylinder bottom, and the cylinder bottom is provided with an oil port A communicated with the inner cavity of the first cylinder barrel; the other end of the first cylinder barrel is provided with an oil port B communicated with the inner cavity of the first cylinder barrel;
the second cylinder is coaxially sleeved in the first cylinder; one end of the second cylinder barrel is provided with a first oil port B communicated with the inner cavity of the second cylinder barrel, the other end of the second cylinder barrel is provided with a second oil port B communicated with the inner cavity of the second cylinder barrel, the first oil port B and the second oil port B are communicated through an annular cavity arranged in the second cylinder barrel, and the first oil port B is communicated with the oil port B through a gap between the second cylinder barrel and the first cylinder barrel; the second cylinder barrel can move repeatedly along the axial direction of the first cylinder barrel, and two ends of the second cylinder barrel respectively carry out movement limiting through a limiting structure in the first cylinder barrel;
the third cylinder is coaxially sleeved in the second cylinder; one end of the third cylinder barrel is provided with a third oil port B communicated with the inner cavity of the third cylinder barrel, the other end of the third cylinder barrel is provided with a fourth oil port B communicated with the inner cavity of the third cylinder barrel, the third oil port B and the fourth oil port B are communicated through an annular cavity arranged in the third cylinder barrel, and the third oil port B is communicated with the second oil port B through a gap between the third cylinder barrel and the second cylinder barrel; the third cylinder barrel can move repeatedly along the axial direction of the second cylinder barrel, and two ends of the third cylinder barrel are respectively limited by the limiting structures in the second cylinder barrel;
the piston rod is of a hollow structure, one end of the piston rod is provided with an axial stepped hole communicated with an inner cavity of the piston rod, the other end of the piston rod is provided with two connecting holes communicated with the inner cavity of the piston rod, namely an oil port C and an oil port D, and the oil port C and the oil port D are respectively connected with hydraulic equipment arranged on a driven platform at the end part of the end of the piston rod through pipelines and are used for supplying oil to the hydraulic equipment on the driven platform and receiving the return oil of the hydraulic equipment on the driven platform; a first integrated valve is arranged on a pipeline connected with the oil port C; the oil port D is connected with one end of the axial stepped hole through an oil pipe, and the other end of the axial stepped hole is provided with a second integrated valve to seal the axial stepped hole;
the piston rod is sleeved in the third cylinder barrel; a fifth oil port B communicated with the inner cavity of the second integration valve is formed in the end, where the second integration valve is located, of the piston rod, and the fifth oil port B is communicated with the fourth oil port B through a gap between the piston rod and the third cylinder; the piston rod can move repeatedly along the axial direction of the third cylinder barrel, and two ends of the piston rod are respectively limited in movement through a limiting structure in the third cylinder barrel;
the first integration valve is used for enabling hydraulic oil to freely flow into the oil port C from a pipeline connected with hydraulic equipment on the driven platform and further flow into an inner cavity of the piston rod; hydraulic oil in the inner cavity of the piston rod can flow into a pipeline connected with hydraulic equipment on the driven platform through the oil port C after reaching the set pressure;
the second integration valve is used for enabling hydraulic oil to freely flow into an inner cavity of the third cylinder barrel from an oil pipe; and the hydraulic oil in the inner cavity of the third cylinder barrel can flow into the oil pipe from the inner cavity of the third cylinder barrel after reaching the set pressure.
Further, limit structure in the first cylinder is: the end surface of the first guide sleeve and the end surface of the cylinder bottom are arranged on the inner circumferential surface of the first cylinder barrel.
Further, limit structure in the second cylinder is: the end surface of a second guide sleeve arranged on the inner circumferential surface of the second cylinder and the step surface of the inner circumferential surface of the end part of the second cylinder are arranged.
Further, limit structure in the third cylinder is: the end surface of a third guide sleeve arranged on the inner circumferential surface of the third cylinder and the step surface of the inner circumferential surface of the end part of the third cylinder.
Furthermore, the device also comprises a first pressure regulating valve and a second pressure regulating valve;
the first pressure regulating valve is arranged on a pipeline which is connected with the hydraulic equipment on the driven platform and the oil port D; the second pressure regulating valve is arranged on a pipeline which is connected with the hydraulic equipment on the driven platform and the oil port C; the first pressure regulating valve and the second pressure regulating valve are used for regulating the pressure of hydraulic oil entering the hydraulic equipment on the driven platform.
Furthermore, the piston rod is composed of a third piston rod and a cylinder sleeve coaxially and fixedly connected to the end of the third piston rod.
Has the advantages that: (1) the utility model discloses a multistage hydraulic cylinder can the liquid accuse stretch out, and the liquid accuse is withdrawed, sets up extra oil circuit simultaneously in this multistage hydraulic cylinder, and oil pipe passes through hydraulic fluid port C and the pipeline that is connected by drive platform and third piston rod pass through hydraulic fluid port D and the pipeline that is connected by drive platform promptly, when the piston rod of pneumatic cylinder (second cylinder, third cylinder and third piston rod promptly) all stretches out the time or when whole withdrawal, and built-in extra oil circuit can provide power for the hydraulic equipment on the driven platform.
(2) The utility model discloses an extra oil circuit sets up inside multistage pneumatic cylinder, can reduce the structure size of pneumatic cylinder by a great extent, for operating mode saving valuable installation space under water, and avoid mechanism hose connection and cable arrangement under water to the influence of equipment reliability.
(3) The utility model discloses a when the piston rod (second cylinder promptly, third cylinder and third piston rod) all stretched out, the hydraulic oil of no pole intracavity and the hydraulic oil confession of extra oil circuit, when the piston rod (second cylinder promptly, third cylinder and third piston rod) were all retracted, there is the hydraulic oil of pole intracavity and the hydraulic oil confession of extra oil circuit, simultaneously through two integrated valves, the flexible of having guaranteed multistage pneumatic cylinder and providing power mutually noninterfere for the hydraulic equipment on being driven the platform through extra oil circuit, the continuous noncongestion of the flexible process oil circuit at different levels of multistage pneumatic cylinder has been guaranteed simultaneously.
Drawings
FIG. 1 is a structural composition diagram of the present invention;
the hydraulic cylinder comprises 1-oil port A, 2-cylinder bottom, 3-first cylinder, 4-oil port B, 5-first oil port B, 6-first guide sleeve, 7-second oil port B, 8-third oil port B, 9-second cylinder, 10-second guide sleeve, 11-fourth oil port B, 12-fifth oil port B, 13-third cylinder, 14-third guide sleeve, 15-first pressure regulating valve, 16-driven platform, 17-second pressure regulating valve, 18-first integrated valve, 19-oil port C, 20-third piston rod, 21-oil pipe, 22-second integrated valve, 23-cylinder sleeve and 24-oil port D.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of examples.
The embodiment provides a double-acting multistage hydraulic cylinder with an additional built-in oil circuit, referring to the attached figure 1, and comprises: the hydraulic cylinder comprises a cylinder bottom 2, a first cylinder barrel 3, a first guide sleeve 6, a second cylinder barrel 9, a second guide sleeve 10, a third cylinder barrel 13, a third guide sleeve 14, a third piston rod 20, a cylinder sleeve 23, a first pressure regulating valve 15, a second pressure regulating valve 17, a first integration valve 18 and a second integration valve 22;
the second cylinder 9 is simultaneously a first piston rod;
the third cylinder 13 is also a second piston rod;
the first cylinder barrel 3, the second cylinder barrel 9 and the third cylinder barrel 13 are all cylinder bodies with openings at two ends;
one end of the first cylinder barrel 3 closes the opening end thereof through the cylinder bottom 2, and the cylinder bottom 2 is provided with an oil port A1 communicated with the inner cavity of the first cylinder barrel 3; the inner circumferential surface of the other end of the first cylinder barrel 3 is sleeved with a first guide sleeve 6, and the end of the first cylinder barrel 3 is also provided with an oil port B4 communicated with the inner cavity of the first cylinder barrel;
the second cylinder 9 is coaxially sleeved in the first cylinder 3; one end of the second cylinder 9 is provided with a first oil port B5 communicated with the inner cavity of the second cylinder, the other end of the second cylinder is provided with a second oil port B7 communicated with the inner cavity of the second cylinder, the first oil port B5 and the second oil port B7 are communicated through an annular cavity arranged in the second cylinder 9, and the first oil port B5 is communicated with the oil port B4 through a gap between the second cylinder 9 and the first cylinder 3; the inner circumferential surface of the end of the second cylinder 9 where the second oil port B7 is located is sleeved with a second guide sleeve 10; the second cylinder 9 can move repeatedly along the axial direction of the first cylinder 3, and two ends of the second cylinder 9 respectively limit the movement through the end surface of the first guide sleeve 6 and the end surface of the cylinder bottom 2, namely when a step surface arranged on the outer circumferential surface of the second cylinder 9 is abutted against the end surface of the first guide sleeve 6, the second cylinder 9 moves to the left in place, namely the second cylinder 9 completely extends out; when the right end face of the second cylinder 9 is abutted against the end face of the cylinder bottom 2, the second cylinder 9 moves rightwards to a proper position, namely the second cylinder 9 retracts completely;
the third cylinder 13 is coaxially sleeved in the second cylinder 9; one end of the third cylinder 13 is provided with a third oil port B8 communicated with the inner cavity of the third cylinder, the other end of the third cylinder is provided with a fourth oil port B11 communicated with the inner cavity of the third cylinder, the third oil port B8 and the fourth oil port B11 are communicated through an annular cavity arranged in the third cylinder 13, and the third oil port B8 is communicated with the second oil port B7 through a gap between the third cylinder 13 and the second cylinder 9; the inner circumferential surface of the end of the third cylinder 13 where the fourth port B11 is located is sleeved with a third guide sleeve 14; the third cylinder 13 can move repeatedly along the axial direction of the second cylinder 9, and the two ends of the third cylinder 13 respectively perform movement limiting through the end surface of the second guide sleeve 10 and the step surface of the inner circumferential surface of the end part of the second cylinder 9, that is, when the step surface arranged on the outer circumferential surface of the third cylinder 13 is abutted against the end surface of the second guide sleeve 10, the third cylinder 13 moves to the left in place, that is, the third cylinder 13 completely extends out; when the right end face of the third cylinder 9 is abutted against the step face of the inner circumferential face of the end part of the second cylinder 9, the third cylinder 9 moves rightwards to a proper position, namely the third cylinder 9 retracts completely;
the third piston rod 20 is of a hollow structure, one end of the third piston rod is provided with an axial hole communicated with the inner cavity of the third piston rod, the other end of the third piston rod is provided with two connecting holes communicated with the inner cavity of the third piston rod, namely an oil port C19 and an oil port D24, the oil port C19 and the oil port D24 are respectively connected with hydraulic equipment on the driven platform 16 arranged at the end part of the third piston rod 20 through pipelines and are used for supplying oil to the hydraulic equipment on the driven platform 16 and receiving the return oil of the hydraulic equipment on the driven platform 16; a first integration valve 18 and a second pressure regulating valve 17 are installed on a pipeline connected with the oil port C19; a first pressure regulating valve 15 is arranged on a pipeline connected with the oil port D24, and the oil port D24 is connected with the axial hole through an oil pipe 21;
the end of the third piston rod 20 where the axial hole is located is coaxially and fixedly connected with the cylinder sleeve 23 to form an integral rod, and the axial through hole in the cylinder sleeve 23 is communicated with the oil pipe 21 in the third piston rod 20; a second integrated valve 22 is arranged in the axial through hole of the cylinder sleeve 23 to seal the axial through hole; the integral rod is sleeved in the third cylinder 13; the end of the cylinder sleeve 23 of the third piston rod 20 is provided with a fifth oil port B12 communicated with the inner cavity of the cylinder sleeve, and the fifth oil port B12 is communicated with a fourth oil port B11 through a gap between the integral rod and the third cylinder 13; the integral rod can move repeatedly along the axial direction of the third cylinder 13, and two ends of the integral rod respectively perform movement limiting through the end surface of the third guide sleeve 14 and the step surface of the inner circumferential surface of the end part of the third cylinder 13, namely when the left end surface of the cylinder sleeve 23 is abutted against the right end surface of the third guide sleeve 14, the third piston rod 20 moves to the left in place, namely the third piston rod 20 extends completely; when the right end face of the cylinder sleeve 23 is abutted against the step face of the inner circumferential surface of the end part of the third cylinder 13, the third piston rod 20 moves rightwards to a position, namely the third piston rod 20 retracts completely;
the inner cavity of the first cylinder 3, the inner cavity of the second cylinder 9, the inner cavity of the third cylinder 13 and the inner cavity of the oil pipe 21 form a rodless cavity, and oil inlets and oil outlets of the rodless cavity are respectively an oil port A1 and an oil port D24; an inner cavity of the third piston rod 20, a gap between the integral rod and the third cylinder 13, a gap between the third cylinder 13 and the second cylinder 9, and a gap between the second cylinder 9 and the first cylinder 3 are communicated in sequence through a fifth oil port B12, a fourth oil port B11, a third oil port B8, a second oil port B7 and a first oil port B5 to form a lever cavity, and oil inlet and outlet ports of the lever cavity are respectively an oil port B4 and an oil port C19;
the first integration valve 18 and the second integration valve 22 are both an aggregation of one-way valves and sequence valves; when the second integration valve 22 is used as a one-way valve, hydraulic oil can flow into the rodless cavity from the oil pipe 21, and when the second integration valve 22 is used as a sequence valve, hydraulic oil in the rodless cavity can flow into the oil pipe 21 from the rodless cavity after reaching a set pressure; when the first integration valve 18 is used as a check valve, hydraulic oil can flow into the oil port C19 from a pipeline connected with hydraulic equipment on the driven platform 16 and further flow into the lever cavity, and when the first integration valve 18 is used as a sequence valve, the hydraulic oil in the lever cavity can flow into the pipeline connected with the hydraulic equipment on the driven platform 16 from the lever cavity through the oil port C19 after reaching a set pressure;
the first pressure regulating valve 15 and the second pressure regulating valve 17 are each used to regulate the pressure of hydraulic oil entering the hydraulic equipment on the driven platform 16.
The working principle is as follows: the end of the third piston rod 20 where the connecting hole is located is connected with the driven platform 16, and the multi-stage hydraulic cylinder is used for driving the driven platform 16 to extend or retract and simultaneously supplying oil and returning oil to the hydraulic equipment on the driven platform 16;
(1) the situation of extending all the hydraulic cylinders and supplying and returning oil to the hydraulic equipment on the driven platform 16 at the same time:
initially, the second cylinder 9, the third cylinder 13 and the third piston rod 20 of the multi-stage hydraulic cylinder are in a fully retracted state, and a lever cavity is filled with hydraulic oil;
hydraulic oil with rated pressure P1 is introduced into the oil port A1, the hydraulic oil successively enters the inner cavities of the first cylinder barrel 3, the second cylinder barrel 9 and the third cylinder barrel 13, and the hydraulic oil does not reach the rated pressure P2 set by the second integration valve 22 (P2 is greater than P1) at the moment, so that the second integration valve 22 is in a closed state, the hydraulic oil does not flow into the oil pipe 21, and therefore the hydraulic oil in the inner cavities of the first cylinder barrel 3, the second cylinder barrel 9 and the third cylinder barrel 13 pushes the second cylinder barrel 9 (namely the first piston rod), the third cylinder barrel 13 (namely the second piston rod) and the third piston rod 20 to sequentially extend out; meanwhile, hydraulic oil in the rod cavity sequentially flows out of an external oil return tank through a fifth oil port B12, a fourth oil port B11, a third oil port B8, a second oil port B7, a first oil port B5 and an oil port B4;
when the second cylinder 9 (i.e., the first piston rod), the third cylinder 13 (i.e., the second piston rod) and the third piston rod 20 are all extended out, the oil supply pressure of the oil port a1 is adjusted to the rated pressure P2, that is, the hydraulic oil pressure in the inner cavities of the first cylinder 3, the second cylinder 9 and the third cylinder 13 is the rated pressure P2, and the second integration valve 22 is in an open state because the hydraulic oil reaches the rated pressure P2 set by the second integration valve 22, and the hydraulic oil flows into the oil pipe 21 and supplies oil to the hydraulic equipment on the driven platform 16 through the oil port D24; the first pressure regulating valve 15 is arranged between the oil port D24 and the hydraulic equipment on the driven platform 16, and is used for ensuring that hydraulic oil with proper pressure is input into the hydraulic equipment on the driven platform 16; meanwhile, hydraulic oil output from hydraulic equipment on the driven platform 16 enters the rod cavity through the oil port C19 (wherein, the first integration valve 18 is a one-way valve at this time), and then flows out to an external oil return tank through the fifth oil port B12, the fourth oil port B11, the third oil port B8, the second oil port B7, the first oil port B5 and the oil port B4 in sequence;
(2) the situation of fully retracting the multi-stage hydraulic cylinders and simultaneously supplying and returning oil to the hydraulic equipment on the driven platform 16:
initially, the second cylinder 9, the third cylinder 13 and the third piston rod 20 of the multi-stage hydraulic cylinder are in a fully extended state, and a rodless cavity is filled with hydraulic oil;
hydraulic oil with rated pressure P3 is introduced into the oil port B4, and sequentially enters the gap between the second cylinder 9 and the first cylinder 3, the gap between the third cylinder 13 and the second cylinder 9, the gap between the integrated rod and the third cylinder 13, and the inner cavity of the third piston rod 20 through the oil port B4, the first oil port B5, the second oil port B7, the third oil port B8, the fourth oil port B11, and the fifth oil port B12, and therefore the first integration valve 18 is in a closed state, and the hydraulic oil does not flow into hydraulic equipment on the driven platform 16 through the oil port C because the rated pressure P2 set by the first integration valve 18 is not reached (P2 is greater than P3), and therefore the gap between the second cylinder 9 and the first cylinder 3, the gap between the third cylinder 13 and the second cylinder 9, and the gap between the integrated rod and the third cylinder 13 push the third piston rod 20, The third cylinder 13 (i.e., the second piston rod) and the second cylinder 9 (i.e., the first piston rod) are sequentially retracted; meanwhile, the hydraulic oil in the inner cavities of the first cylinder 3, the second cylinder 9 and the third cylinder 13 flows out to an external oil return tank through an oil port A1;
when the second cylinder 9 (i.e., the first piston rod), the third cylinder 13 (i.e., the second piston rod) and the third piston rod 20 are all retracted, the oil supply pressure of the oil port B4 is adjusted to the rated pressure P2, that is, the hydraulic oil pressure in the inner cavity of the third piston rod 20 is the rated pressure P2, and since the hydraulic oil reaches the rated pressure P2 set by the first integration valve 18 at this time, the first integration valve 18 is in an open state, and the hydraulic oil is supplied to the hydraulic equipment on the driven platform 16 through the oil port C19; the second pressure regulating valve 17 is arranged between the oil port C19 and the hydraulic equipment on the driven platform 16, and is used for ensuring that hydraulic oil with proper pressure is input into the hydraulic equipment on the driven platform 16; meanwhile, the hydraulic oil output from the hydraulic equipment on the driven platform 16 enters the oil pipe 21 through the oil port D24 (wherein the second integration valve 22 is now a check valve), and then flows out to the external oil return tank through the oil port a 1.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A double-acting multistage hydraulic cylinder with an additional oil circuit inside, which is characterized by comprising: the cylinder comprises a cylinder bottom (2), a first cylinder (3), a second cylinder (9), a third cylinder (13), a piston rod, a first integration valve (18) and a second integration valve (22);
the first cylinder barrel (3), the second cylinder barrel (9) and the third cylinder barrel (13) are all cylinder bodies with openings at two ends;
one end of the first cylinder barrel (3) closes the opening end of the first cylinder barrel through the cylinder bottom (2), and an oil port A (1) communicated with the inner cavity of the first cylinder barrel (3) is arranged on the cylinder bottom (2); the other end of the first cylinder barrel (3) is provided with an oil port B (4) communicated with the inner cavity of the first cylinder barrel;
the second cylinder barrel (9) is coaxially sleeved in the first cylinder barrel (3); one end of the second cylinder barrel (9) is provided with a first oil port B (5) communicated with the inner cavity of the second cylinder barrel, the other end of the second cylinder barrel is provided with a second oil port B (7) communicated with the inner cavity of the second cylinder barrel, the first oil port B (5) and the second oil port B (7) are communicated through an annular cavity arranged in the second cylinder barrel (9), and the first oil port B (5) is communicated with the oil port B (4) through a gap between the second cylinder barrel (9) and the first cylinder barrel (3); the second cylinder barrel (9) can move repeatedly along the axial direction of the first cylinder barrel (3), and two ends of the second cylinder barrel (9) are respectively limited in movement through a limiting structure in the first cylinder barrel (3);
the third cylinder barrel (13) is coaxially sleeved in the second cylinder barrel (9); one end of the third cylinder barrel (13) is provided with a third oil port B (8) communicated with the inner cavity of the third cylinder barrel, the other end of the third cylinder barrel is provided with a fourth oil port B (11) communicated with the inner cavity of the third cylinder barrel, the third oil port B (8) and the fourth oil port B (11) are communicated through an annular cavity arranged in the third cylinder barrel (13), and the third oil port B (8) is communicated with the second oil port B (7) through a gap between the third cylinder barrel (13) and the second cylinder barrel (9); the third cylinder barrel (13) can move repeatedly along the axial direction of the second cylinder barrel (9), and two ends of the third cylinder barrel (13) are respectively limited in movement through a limiting structure in the second cylinder barrel (9);
the piston rod is of a hollow structure, one end of the piston rod is provided with an axial stepped hole communicated with an inner cavity of the piston rod, the other end of the piston rod is provided with two connecting holes communicated with the inner cavity of the piston rod, namely an oil port C (19) and an oil port D (24), and the oil port C (19) and the oil port D (24) are respectively connected with hydraulic equipment arranged on a driven platform (16) at the end part of the piston rod through pipelines and used for supplying oil to the hydraulic equipment on the driven platform (16) and receiving the return oil of the hydraulic equipment on the driven platform (16); a first integrated valve (18) is arranged on a pipeline connected with the oil port C (19); an oil port D (24) is connected with one end of the axial stepped hole through an oil pipe (21), and a second integrated valve (22) is mounted at the other end of the axial stepped hole to seal the axial stepped hole;
the piston rod is sleeved in the third cylinder barrel (13); a fifth oil port B (12) communicated with the inner cavity of the second integrated valve (22) is arranged at the end of the piston rod, and the fifth oil port B (12) is communicated with a fourth oil port B (11) through a gap between the piston rod and the third cylinder barrel (13); the piston rod can move repeatedly along the axial direction of the third cylinder barrel (13), and two ends of the piston rod are respectively limited in movement through a limiting structure in the third cylinder barrel (13);
the first integration valve (18) is used for enabling hydraulic oil to freely flow into the oil port C (19) from a pipeline connected with hydraulic equipment on the driven platform (16) and further flow into an inner cavity of the piston rod; hydraulic oil in the inner cavity of the piston rod can flow into a pipeline connected with hydraulic equipment on the driven platform (16) through the oil port C (19) after reaching the set pressure;
the second integration valve (22) is used for enabling hydraulic oil to freely flow into an inner cavity of the third cylinder barrel (13) from an oil pipe (21); and the hydraulic oil in the inner cavity of the third cylinder barrel (13) can flow into the oil pipe (21) from the inner cavity of the third cylinder barrel (13) after reaching the set pressure.
2. A double-acting multistage hydraulic cylinder with an additional oil circuit inside according to claim 1, wherein the limiting structure inside the first cylinder (3) is: the end surface of a first guide sleeve (6) arranged on the inner circumferential surface of the first cylinder barrel (3) and the end surface of the cylinder bottom (2).
3. A double-acting multistage hydraulic cylinder with an additional oil circuit inside according to claim 1, wherein the limiting structure inside the second cylinder (9) is: the end surface of a second guide sleeve (10) arranged on the inner circumferential surface of the second cylinder barrel (9) and the step surface of the inner circumferential surface of the end part of the second cylinder barrel (9).
4. A double-acting multistage hydraulic cylinder with an additional oil circuit inside according to claim 1, wherein the limiting structure inside the third cylinder (13) is: the end surface of a third guide sleeve (14) arranged on the inner circumferential surface of the third cylinder barrel (13) and the step surface of the inner circumferential surface of the end part of the third cylinder barrel (13).
5. A double-acting multistage hydraulic cylinder with an additional oil passage built therein according to claim 1, further comprising a first pressure regulating valve (15) and a second pressure regulating valve (17);
the first pressure regulating valve (15) is arranged on a pipeline which is connected with a hydraulic device and an oil port D (24) on the driven platform (16); the second pressure regulating valve (17) is arranged on a pipeline which is connected with the hydraulic equipment on the driven platform (16) and the oil port C (19); the first pressure regulating valve (15) and the second pressure regulating valve (17) are used for regulating the pressure of hydraulic oil entering a hydraulic device on a driven platform (16).
6. A double-acting multi-stage hydraulic cylinder with an additional oil circuit inside according to claim 1, characterized in that the piston rod is composed of a third piston rod (20) and a cylinder sleeve (23) coaxially fixed at its end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920231795.5U CN210050128U (en) | 2019-02-22 | 2019-02-22 | Double-acting multistage hydraulic cylinder with built-in additional oil way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920231795.5U CN210050128U (en) | 2019-02-22 | 2019-02-22 | Double-acting multistage hydraulic cylinder with built-in additional oil way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210050128U true CN210050128U (en) | 2020-02-11 |
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ID=69377800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920231795.5U Active CN210050128U (en) | 2019-02-22 | 2019-02-22 | Double-acting multistage hydraulic cylinder with built-in additional oil way |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210050128U (en) |
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2019
- 2019-02-22 CN CN201920231795.5U patent/CN210050128U/en active Active
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