CN213039545U - Sequential telescopic oil cylinder with novel control valve block - Google Patents
Sequential telescopic oil cylinder with novel control valve block Download PDFInfo
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- CN213039545U CN213039545U CN202021801366.6U CN202021801366U CN213039545U CN 213039545 U CN213039545 U CN 213039545U CN 202021801366 U CN202021801366 U CN 202021801366U CN 213039545 U CN213039545 U CN 213039545U
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- 239000003921 oil Substances 0.000 claims description 434
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- 238000007789 sealing Methods 0.000 claims description 3
- 239000010727 cylinder oil Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
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Abstract
The utility model discloses a take flexible hydro-cylinder of order of new-type control valve piece is equipped with liquid accuse check valve and machine accuse check valve in its control valve piece, and the order of the former control cylinder stretches out, and the order withdrawal of the latter control cylinder. The utility model discloses it is unrestricted to the area ratio of hydro-cylinder progression and hydro-cylinder at different levels, and the flexible hydro-cylinder group in order promptly can comprise many arbitrary jars, and the bore and the pole footpath of each hydro-cylinder can arrange at will. The utility model discloses no sequence valve, loss of pressure is extremely low, and the reliability is high, and control valve piece dismouting is simple, easy maintenance, and the range of application is wide, can use almost all occasions that need sequence action hydro-cylinder, for example common roll over arm-type vehicle-mounted crane and straight arm-type vehicle-mounted crane can all use it.
Description
Technical Field
The utility model relates to a take flexible hydro-cylinder of order of new-type control valve piece belongs to hydro-cylinder technical field.
Background
The prior sequential oil cylinder group mostly limits two oil cylinders or three oil cylinders, and the application range is greatly limited. Although the number of stages of the oil cylinder is not limited, the area of a rodless cavity of the oil cylinder is required to be reduced step by step, the annular area of a rod cavity is increased step by step, and the application range of the oil cylinder is also reduced. And although the number of stages and the area of each stage of oil cylinder are not limited, only sequential extension can be realized, and sequential retraction cannot be realized, so that the application range of the oil cylinder is reduced by half (for example, the oil cylinder can only be used for a folding arm type lorry-mounted crane, but not for a straight arm type lorry-mounted crane). Furthermore, the sequential extension and contraction can be realized without various limiting conditions, but the reliability is low by using a sequential valve and depending on pressure control. In addition, the sequence valve consumes a part of system pressure, and the output force of the oil cylinder is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned prior art and provide a flexible hydro-cylinder of order of taking new-type control valve piece.
The utility model provides a technical scheme as follows: a sequential telescopic oil cylinder with a novel control valve block is characterized by comprising a sequential telescopic oil cylinder group and a last-stage oil cylinder, wherein the sequential telescopic oil cylinder group consists of a plurality of telescopic oil cylinders with the same structure; an outer oil pipe connected with the square joint is arranged outside the cylinder body;
the hydraulic control one-way valve comprises a hydraulic control valve body, a hydraulic control valve rod is arranged in the hydraulic control valve body, and a hydraulic control valve cover is arranged between one end of the hydraulic control valve body and the hydraulic control valve rod; a hydraulic control valve spring is sleeved between the other end of the hydraulic control valve body and the hydraulic control valve rod; the lower end of the valve rod of the hydraulic control valve is an external conical surface, the lower end of the valve body of the hydraulic control valve is an internal conical surface, and the external conical surface at the lower end of the valve rod of the hydraulic control valve is tightly attached to the internal conical surface at the lower end of the valve body of the hydraulic control valve to form conical surface sealing; a hydraulic control valve control oil port is arranged on the hydraulic control valve body, a hydraulic control valve A oil hole is arranged in the hydraulic control valve rod, and a hydraulic control valve B oil hole is arranged on the hydraulic control valve rod;
an oil cylinder rod cavity is formed among the cylinder body, the piston rod assembly, the piston and the front cover, an oil cylinder rodless cavity is formed among the cylinder body, the piston and the central oil pipe, a first cylinder body oil port and a second cylinder body oil port are arranged at the right end of the cylinder body, the first cylinder body oil port is communicated with the outer oil pipe, and the second cylinder body oil port is communicated with the oil cylinder rod cavity; the inner wall of the cylinder body is provided with a cylinder body oil hole which is communicated with the control oil pipe; the end part of the piston rod assembly is provided with a first piston rod oil port and a second piston rod oil port, a piston rod oil cavity is arranged inside the piston rod assembly, a piston rod oil hole is formed in the piston rod assembly and is close to the root part of the piston, the second piston rod oil port is communicated with the piston rod oil cavity and the piston rod oil hole, and the piston rod oil hole is communicated with the oil cylinder rod cavity; the first piston rod oil port is communicated with the central oil pipe;
an internal oil cavity of the control valve block is formed in the control valve block and is communicated with the central oil pipe; the control oil pipe is communicated with a control oil port of the hydraulic control valve, the oil hole of the hydraulic control valve B is communicated with the oil hole of the hydraulic control valve A, and the oil hole of the hydraulic control valve A is communicated with the outer oil pipe;
an oil cavity in the control valve block of the control valve block is communicated with one end of the machine-controlled one-way valve; the other end of the mechanical control one-way valve is communicated with the rodless cavity of the oil cylinder;
the last-stage oil cylinder comprises a last-stage oil cylinder body, a last-stage oil cylinder piston and a last-stage oil cylinder piston rod assembly which are mutually connected are arranged in the last-stage oil cylinder body, and a last-stage oil cylinder front cover is connected between the last-stage oil cylinder body and the last-stage oil cylinder piston rod assembly; the end part of the piston rod assembly of the last-stage oil cylinder is provided with a first oil port of the last-stage oil cylinder and a second oil port of the last-stage oil cylinder, and an oil pipe of the last-stage oil cylinder and an oil cavity of the last-stage oil cylinder are arranged inside the piston rod assembly of the last-stage oil cylinder; the last-stage oil cylinder piston is provided with a last-stage oil cylinder center oil hole, and the right end step of the last-stage oil cylinder piston is provided with a last-stage oil cylinder oil hole; the first oil port of the last-stage oil cylinder is communicated with an oil pipe of the last-stage oil cylinder, a central oil hole of the last-stage oil cylinder and a rodless cavity of the last-stage oil cylinder, and the second oil port of the last-stage oil cylinder is communicated with an oil cavity of the last-stage oil cylinder, an oil hole of the last-stage oil cylinder and a rod cavity of the last-stage;
a first cylinder body oil port of each stage of telescopic oil cylinder is connected with a first piston rod oil port of the next stage of telescopic oil cylinder through an external pipeline, and a first cylinder body oil port of the last stage of telescopic oil cylinder is connected with a first oil port of the last stage of oil cylinder through an external pipeline; a second cylinder body oil port of each stage of telescopic oil cylinder is connected with a second piston rod oil port of the next stage of telescopic oil cylinder through an external pipeline, and a second cylinder body oil port of the last stage of telescopic oil cylinder is connected with a second oil port of the last stage of telescopic oil cylinder through an external pipeline; the cylinder body of each stage of telescopic cylinder is connected with the piston rod assembly of the next stage of telescopic cylinder into a whole, and the cylinder body of the last stage of telescopic cylinder is connected with the piston rod assembly of the last stage of telescopic cylinder into a whole; the left end of the middle stage telescopic oil cylinder is provided with a first control rod, the first control rod is in contact with a machine control valve striker of the upper stage telescopic oil cylinder to control a machine control one-way valve of the upper stage telescopic oil cylinder, and the left end of the last stage oil cylinder is provided with a second control rod in contact with a machine control valve striker of the last stage telescopic oil cylinder to control a machine control one-way valve of the last stage telescopic oil cylinder.
Furthermore, the machine control one-way valve comprises a machine control valve body, a machine control valve rod is arranged in the machine control valve body, a machine control valve cover is arranged between the machine control valve body and the machine control valve rod, the front end of the machine control valve cover is connected with a machine control valve front sleeve, the front end of the machine control valve front sleeve is connected with a machine control valve baffle cover, the front end of the machine control valve rod is connected with a machine control valve collision rod, the front end of the machine control valve collision rod extends out of the machine control valve baffle cover, a machine control valve spring is arranged between the rear end of the machine control valve rod and the machine control valve body, a machine control valve C oil hole is arranged on the machine control valve front sleeve; an oil cavity in the control valve block of the control valve block is communicated with a machine control valve C oil hole of the machine control one-way valve; the oil hole of the machine control valve D of the machine control one-way valve is communicated with the rodless cavity of the oil cylinder.
The utility model has the advantages that:
the utility model discloses it is unrestricted to the area ratio of hydro-cylinder progression and hydro-cylinder at different levels, can stretch out in order in fact, also can realize the order withdrawal, used the new-type control valve piece of taking liquid accuse check valve and machine accuse check valve moreover, and do not have the sequence valve, loss of pressure is extremely low, and the reliability is high. The control valve block is simple to disassemble and assemble and convenient to maintain. The utility model discloses the range of application is wide, can use almost all occasions that need the sequence action hydro-cylinder.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a state diagram of the cylinder body and the control valve of the present invention at the leftmost end of the equal movement;
FIG. 3 is a schematic structural view of the mechanically controlled check valve of the present invention in an open state;
FIG. 4 is a schematic structural view of the mechanically controlled check valve of the present invention in a closed state;
fig. 5 is a schematic structural view of the closed state of the hydraulic control check valve of the present invention;
fig. 6 is a schematic structural view of the open state of the hydraulic control check valve of the present invention.
Detailed Description
The following detailed description of the presently preferred embodiments will be made in conjunction with the accompanying drawings:
as shown in figures 1 and 2, the sequential telescopic oil cylinder with the novel control valve block comprises a sequential telescopic oil cylinder group and a final-stage oil cylinder, wherein the sequential telescopic oil cylinder group consists of a plurality of telescopic oil cylinders with completely identical structures, and the final-stage oil cylinder is different from the telescopic oil cylinders in structure and is relatively simple. In some occasions (such as straight arm type truck-mounted crane), all hydro-cylinders use simultaneously, when requiring to stretch out: the piston rod of the first stage telescopic cylinder extends out first, and after the piston rod of the second stage telescopic cylinder extends out … …, the piston rod of the last stage telescopic cylinder extends out again; when retracting: the piston rod of the last-stage oil cylinder retracts firstly, after the piston rod reaches the head, the piston rod of the penultimate telescopic oil cylinder begins to retract, and so on. The present embodiment takes a three-stage cylinder as an example, that is, the three-stage cylinder includes a two-stage telescopic cylinder and a last stage cylinder.
Each telescopic oil cylinder of the sequential telescopic oil cylinder group comprises a cylinder body 1, a piston rod assembly 2 and a piston 3 which are connected with each other are arranged in the cylinder body 1, a front cover 5 is connected between the cylinder body 1 and the piston rod assembly 2, the left end of the cylinder body 1 is connected with a control valve block 4, the control valve block 4 comprises a square connector 4-3 arranged outside, a machine control one-way valve 4-1 and a hydraulic control one-way valve 4-2 arranged inside, a central oil pipe 6 is arranged in the piston rod assembly 2, and the central oil pipe 6 penetrates through the piston 3 to be connected with the cylinder body 1. An outer oil pipe 9 connected with the square joint 4-3 is arranged outside the cylinder body 1.
As shown in figures 3 and 4, the machine-controlled one-way valve 4-1 comprises a machine-controlled valve body 4-1-1, a machine-controlled valve rod 4-1-2 is arranged in the machine-controlled valve body 4-1-1, a machine-controlled valve cover 4-1-3 is arranged between the machine-controlled valve body 4-1-1 and the machine-controlled valve rod 4-1-2, the front end of the machine-controlled valve cover 4-1-3 is connected with a machine-controlled valve front sleeve 4-1-5, the front end of the machine-controlled valve front sleeve 4-1-5 is connected with a machine-controlled valve blocking cover 4-1-6, the front end of the machine-controlled valve rod 4-1-2 is connected with a machine-controlled valve collision rod 4-1-7, the front end of the machine-controlled valve collision rod 4-1-7 extends out of the machine-controlled valve blocking cover 4-1-6, and a machine-controlled valve spring is arranged between 4-1-4, the front sleeve 4-1-5 of the machine control valve is provided with an oil hole 4-1-8 of the machine control valve C, and the end part of the valve body 4-1-1 of the machine control valve is provided with an oil hole 4-1-9 of the machine control valve D.
As shown in fig. 5 and 6, the hydraulic control check valve 4-2 includes a hydraulic control valve body 4-2-1, a hydraulic control valve rod 4-2-2 is disposed in the hydraulic control valve body 4-2-1, and a hydraulic control valve cover 4-2-3 is disposed between one end of the hydraulic control valve body 4-2-1 and the hydraulic control valve rod 4-2-2. A hydraulic control valve spring 4-2-4 is sleeved between the other end of the hydraulic control valve body 4-2-1 and the hydraulic control valve rod 4-2-2. The lower end of the valve rod 4-2-2 of the hydraulic control valve is an external conical surface, the lower end of the valve body 4-2-1 of the hydraulic control valve is an internal conical surface, and the external conical surface at the lower end of the valve rod 4-2-2 of the hydraulic control valve is tightly attached to the internal conical surface at the lower end of the valve body 4-2-1 of the hydraulic control valve to form conical surface sealing. A hydraulic control valve control oil port 4-2-5 is arranged on the hydraulic control valve body 4-2-1, a hydraulic control valve A oil hole 4-2-7 is arranged in the hydraulic control valve rod 4-2-2, and a hydraulic control valve B oil hole 4-2-8 is arranged on the hydraulic control valve rod 4-2-2.
An oil cylinder rod cavity 8 is formed among the cylinder body 1, the piston rod assembly 2, the piston 3 and the front cover 5, an oil cylinder rodless cavity 7 is formed among the cylinder body 1, the piston 3 and the central oil pipe 6, a first cylinder body oil port 1-1 and a second cylinder body oil port 1-2 are arranged at the right end of the cylinder body 1, the first cylinder body oil port 1-1 is communicated with the outer oil pipe 9, and the second cylinder body oil port 1-2 is communicated with the oil cylinder rod cavity 8. The inner wall of the cylinder body 1 is provided with cylinder body oil holes 1-3, and the cylinder body oil holes 1-3 are communicated with control oil pipes 1-4; the end part of the piston rod assembly 2 is provided with a first piston rod oil port 2-1 and a second piston rod oil port 2-2, a piston rod oil cavity 2-3 is arranged inside the piston rod assembly 2, a piston rod oil hole 2-4 is arranged at the root part, close to the piston 3, of the piston rod assembly 2, the second piston rod oil port 2-2 is communicated with the piston rod oil cavity 2-3 and the piston rod oil hole 2-4, and the piston rod oil hole 2-4 is communicated with an oil cylinder rod cavity 8. The first piston rod oil port 2-1 is communicated with the central oil pipe 6.
A control valve block internal oil cavity 4-4 is formed in the control valve block 4, and the control valve block internal oil cavity 4-4 is communicated with a central oil pipe 6. The control oil pipe 1-4 is communicated with a hydraulic control valve control oil port 4-2-5, the hydraulic control valve B oil port 4-2-8 is communicated with the hydraulic control valve A oil port 4-2-7, and the hydraulic control valve A oil port 4-2-7 is communicated with an outer oil pipe 9.
An internal oil chamber 4-4 of the control valve block 4 is communicated with an oil hole 4-1-8 of a machine control valve C of the machine control one-way valve 4-1. The oil hole 4-1-9 of the mechanical control valve D of the mechanical control one-way valve 4-1 is communicated with the rodless cavity 7 of the oil cylinder.
The last-stage oil cylinder comprises a last-stage oil cylinder body 14, a last-stage oil cylinder piston 12 and a last-stage oil cylinder piston rod assembly 13 which are connected with each other are arranged in the last-stage oil cylinder body 14, and a last-stage oil cylinder front cover 15 is connected between the last-stage oil cylinder body 14 and the last-stage oil cylinder piston rod assembly 13. The end part of the last-stage oil cylinder piston rod assembly 13 is provided with a first oil port 13-1 of the last-stage oil cylinder and a second oil port 13-2 of the last-stage oil cylinder, and the inside of the last-stage oil cylinder piston rod assembly is provided with an oil pipe 13-3 of the last-stage oil cylinder and an oil chamber 13-4 of the last-stage oil cylinder. The piston 12 of the last-stage oil cylinder is provided with a center oil hole 12-1 of the last-stage oil cylinder, and the right end step of the piston is provided with an oil hole 12-2 of the last-stage oil cylinder. A first oil port 13-1 of the last-stage oil cylinder is communicated with an oil pipe 13-3 of the last-stage oil cylinder, a central oil hole 12-1 of the last-stage oil cylinder and a rodless cavity 16 of the last-stage oil cylinder; the second oil port 13-2 of the last-stage oil cylinder is communicated with the oil chamber 13-4 of the last-stage oil cylinder, the oil hole 12-2 of the last-stage oil cylinder and the rod chamber 17 of the last-stage oil cylinder.
A first cylinder body oil port 1-1 of the first-stage telescopic oil cylinder is connected with a first piston rod oil port 2-1 of the second-stage telescopic oil cylinder through an external pipeline, and a first cylinder body oil port 1-1 of the second-stage telescopic oil cylinder is connected with a first oil port 13-1 of a last-stage oil cylinder through an external pipeline; the second cylinder body oil port 1-2 of the first-stage telescopic oil cylinder is connected with the second piston rod oil port 2-2 of the second-stage telescopic oil cylinder through an external pipeline, and the second cylinder body oil port 1-2 of the second-stage telescopic oil cylinder is connected with the second oil port 13-2 of the last-stage oil cylinder through an external pipeline. The cylinder body 1 of the first-stage telescopic cylinder and the piston rod assembly 2 of the second-stage telescopic cylinder are rigidly connected into a whole through a mechanical mode (for example, a straight-arm type truck-mounted crane is connected through a suspension arm), and the cylinder body 1 of the second-stage telescopic cylinder and the piston rod assembly 13 of the last-stage cylinder are rigidly connected into a whole through a mechanical mode. The left end of the second-stage telescopic oil cylinder is provided with a first control rod 10, the first control rod 10 is in contact with a machine control valve collision rod 4-1-7 of the first-stage telescopic oil cylinder to control a machine control one-way valve of the first-stage telescopic oil cylinder, and the left end of the last-stage oil cylinder is provided with a second control rod 11 which is in contact with the machine control valve collision rod 4-1-7 of the second-stage telescopic oil cylinder to control the machine control one-way valve of the second-stage telescopic oil cylinder.
The action principle is as follows:
the head of the piston rod assembly 2 of the first stage (the uppermost stage) is fixed.
The oil cylinder extends out in sequence:
pressure oil is fed into a first piston rod oil port 2-1 of a first-stage telescopic oil cylinder and reaches an internal oil cavity 4-4 of a control valve block through a central oil pipe 6, at the moment, a machine-controlled check valve 4-1 is in an opening state under the extrusion of a first control rod 10, namely, an oil hole 4-1-8 of a machine-controlled valve C is communicated with an oil hole 4-1-9 of a machine-controlled valve D, and a hydraulic-controlled check valve 4-2 is in a closing state, so that the pressure oil only has one direction and enters a rodless cavity 7 of the oil cylinder through the machine-controlled check valve 4-1 to push the cylinder body 1 together with a control valve block 4, a front cover 5, an outer oil pipe 9 and the like (and drive two stages of. After reaching the leftmost end (see figure 2), pressure oil in a rodless cavity 7 of the oil cylinder enters a hydraulic control valve control oil port 4-2-5 of a hydraulic control one-way valve 4-2 through an oil hole 1-3 of the cylinder body and a control oil pipe 1-4, the oil pressure overcomes the spring force after the oil enters the valve to open the hydraulic control one-way valve 4-2, an oil hole 4-2-8 of a hydraulic control valve B is completely exposed in an internal oil cavity 4-4 of a control valve block, the pressure oil passes through the oil hole 4-2-8 of the hydraulic control valve B, the oil hole 4-2-7 of the hydraulic control valve A, an outer oil pipe 9 and a first cylinder body oil port 1-1 from the hydraulic control valve B, then reaches a first piston rod oil port 2-1 of a second-stage telescopic oil cylinder through an external pipeline, then reaches the internal oil cavity 4-4 of the control valve block through a central oil pipe 6, namely, the oil hole 4-1-8 of the machine control valve C is communicated with the oil hole 4-1-9 of the machine control valve D, and the hydraulic control one-way valve 4-2 is in a closed state, so that pressure oil enters the rodless cavity 7 of the oil cylinder through the machine control one-way valve 4-1 only in one direction, and pushes the cylinder body 1 together with the control valve block 4, the front cover 5, the outer oil pipe 9, the first control rod 10 and the like (and drives the next-stage oil cylinder to move leftwards. After reaching the leftmost end, (see figure 2) pressure oil in a rodless cavity 7 of the oil cylinder enters a hydraulic control valve control oil port 4-2-5 of a hydraulic control one-way valve 4-2 through a cylinder body oil hole 1-3 and a control oil pipe 1-4, the oil pressure overcomes the spring force after the oil enters the valve, the one-way valve is opened, an oil hole 4-2-8 of a hydraulic control valve B is completely exposed in an inner oil cavity 4-4 of the control valve block, the pressure oil passes through the oil hole 4-2-8 of the hydraulic control valve B, the oil hole 4-2-7 of the hydraulic control valve A, an outer oil pipe 9 and a first cylinder body oil port 1-1 from the hydraulic control valve B, then reaches a first last cylinder end oil port 13-1 of the last oil cylinder through an external pipeline, then enters a rodless cavity 16 of the last cylinder through an oil pipe 13-3 of the last, The final stage cylinder front cover 15, the second control rod 11, etc. move to the left to the leftmost end (state of fig. 2).
The oil cylinder retracts sequentially:
as shown in FIG. 2, pressure oil enters a second piston rod oil port 2-2 of the first-stage telescopic oil cylinder, and enters an oil cylinder rod cavity 8 through a piston rod oil cavity 2-3 and a piston rod oil hole 2-4. At the moment, the first control rod 10 is separated from the machine-controlled one-way valve 4-1 and is in a closed state, namely the oil hole 4-1-8 of the machine-controlled valve C is not communicated with the oil hole 4-1-9 of the machine-controlled valve D, oil in the rodless cavity 7 of the oil cylinder cannot be discharged, the cylinder body of the first-stage telescopic oil cylinder and the like cannot move temporarily, and pressure oil in the rod cavity 8 of the oil cylinder can only pass through the oil hole 1-2 of the second cylinder body and then an external pipeline to reach the oil hole 2-2 of the second piston rod of the second-stage telescopic oil cylinder and then enters the rod cavity 8 of the oil cylinder through the oil cavity 2-3 of the piston rod and the oil hole 2-. Similarly, at this time, the second control rod 11 is separated from the mechanical control one-way valve 4-1 to be in a closed state, that is, the oil hole 4-1-8 of the mechanical control valve C is not communicated with the oil hole 4-1-9 of the mechanical control valve D, the oil in the rod-free cavity 7 of the cylinder cannot be discharged, the cylinder body of the second-stage telescopic cylinder is also temporarily inactive, the pressure oil in the rod cavity 8 of the second-stage telescopic cylinder only can pass through the oil hole 1-2 of the second cylinder body and then through an external pipeline to reach the second oil hole 13-2 of the last-stage cylinder, and then enters the rod cavity 17 of the third-stage cylinder through the oil cavity 13-4 of the last-stage cylinder and the oil hole 12-2 of the last-stage cylinder to push the cylinder body 14 of the last-stage cylinder, the front cover 15 of the last-stage cylinder, the second control rod 11 and the like to move rightwards (the hydraulic oil in the rod-free cavity 16 returns according to the original path when the cylinder extends, the one-way valve is opened by overcoming the spring force by the back pressure of the one-way valve itself) until the rightmost end. At the moment, the second control rod 11 extrudes a mechanical control one-way valve rod (shown in figure 1) of the second-stage telescopic oil cylinder, the mechanical control one-way valve is opened, an oil hole 4-1-8 of the mechanical control valve C is communicated with an oil hole 4-1-9 of the mechanical control valve D, hydraulic oil in a rodless cavity 7 of the second-stage telescopic oil cylinder starts to be discharged (returns according to an original path when the oil cylinder extends out, wherein when the hydraulic control one-way valve 4-2 of the first-stage telescopic oil cylinder passes through, the hydraulic control one-way valve is opened by overcoming the spring force through the back pressure of the hydraulic control one-way valve, and a cylinder body 1 and the like start to move rightwards to the. At the moment, the first control rod 10 extrudes a mechanical control one-way valve rod (shown in figure 1) of the first-stage telescopic oil cylinder, the mechanical control one-way valve 4-1 is opened, an oil hole 4-1-8 of the mechanical control valve C is communicated with an oil hole 4-1-9 of the mechanical control valve D, hydraulic oil in a rodless cavity 7 of the first-stage telescopic oil cylinder starts to be discharged (returns according to an original path when the oil cylinder extends out), and a cylinder body 1 and the like of the first-stage telescopic oil cylinder start to move rightwards to the rightmost end under the action of pressure oil in a rod cavity 8 (the state.
It should be understood that parts of the specification not set forth in detail are well within the prior art. The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art are intended to fall within the scope of the present invention as defined by the claims.
Claims (2)
1. A sequential telescopic oil cylinder with a novel control valve block is characterized by comprising a sequential telescopic oil cylinder group and a last-stage oil cylinder, wherein the sequential telescopic oil cylinder group consists of a plurality of telescopic oil cylinders with the same structure, each telescopic oil cylinder of the sequential telescopic oil cylinder group comprises a cylinder body (1), a piston rod assembly (2) and a piston (3) which are connected with each other are arranged in the cylinder body (1), a front cover (5) is connected between the cylinder body (1) and the piston rod assembly (2), the left end of the cylinder body (1) is connected with the control valve block (4), the control valve block (4) comprises a square joint (4-3) arranged outside, a machine-controlled one-way valve (4-1) and a hydraulic control one-way valve (4-2) arranged inside, a central oil pipe (6) is arranged in the piston rod assembly (2), and the central oil pipe (6) passes through the piston (; an outer oil pipe (9) connected with the square joint (4-3) is arranged outside the cylinder body (1);
the hydraulic control one-way valve (4-2) comprises a hydraulic control valve body (4-2-1), a hydraulic control valve rod (4-2-2) is arranged in the hydraulic control valve body (4-2-1), and a hydraulic control valve cover (4-2-3) is arranged between one end of the hydraulic control valve body (4-2-1) and the hydraulic control valve rod (4-2-2); a hydraulic control valve spring (4-2-4) is sleeved between the other end of the hydraulic control valve body (4-2-1) and the hydraulic control valve rod (4-2-2); the lower end of the valve rod (4-2-2) of the hydraulic control valve is an external conical surface, the lower end of the valve body (4-2-1) of the hydraulic control valve is an internal conical surface, and the external conical surface at the lower end of the valve rod (4-2-2) of the hydraulic control valve is tightly attached to the internal conical surface at the lower end of the valve body (4-2-1) of the hydraulic control valve to form conical surface sealing; a hydraulic control valve control oil port (4-2-5) is arranged on the hydraulic control valve body (4-2-1), a hydraulic control valve A oil hole (4-2-7) is arranged in the hydraulic control valve rod (4-2-2), and a hydraulic control valve B oil hole (4-2-8) is arranged on the hydraulic control valve rod (4-2-2);
an oil cylinder rod cavity (8) is formed among the cylinder body (1), the piston rod assembly (2), the piston (3) and the front cover (5), an oil cylinder rodless cavity (7) is formed among the cylinder body (1), the piston (3) and the central oil pipe (6), a first cylinder body oil port (1-1) and a second cylinder body oil port (1-2) are arranged at the right end of the cylinder body (1), the first cylinder body oil port (1-1) is communicated with the outer oil pipe (9), and the second cylinder body oil port (1-2) is communicated with the oil cylinder rod cavity (8); the inner wall of the cylinder body (1) is provided with cylinder body oil holes (1-3), and the cylinder body oil holes (1-3) are communicated with the control oil pipes (1-4); a first piston rod oil port (2-1) and a second piston rod oil port (2-2) are arranged at the end part of the piston rod assembly (2), a piston rod oil cavity (2-3) is arranged inside the piston rod assembly (2), a piston rod oil hole (2-4) is formed in the piston rod assembly (2) at the root part close to the piston (3), the second piston rod oil port (2-2) is communicated with the piston rod oil cavity (2-3) and the piston rod oil hole (2-4), and the piston rod oil hole (2-4) is communicated with an oil cylinder rod cavity (8); the first piston rod oil port (2-1) is communicated with the central oil pipe (6);
a control valve block internal oil cavity (4-4) is formed in the control valve block (4), and the control valve block internal oil cavity (4-4) is communicated with the central oil pipe (6); the control oil pipe (1-4) is communicated with a control oil port (4-2-5) of a hydraulic control valve, the oil hole (4-2-8) of the hydraulic control valve B is communicated with the oil hole (4-2-7) of the hydraulic control valve A, and the oil hole (4-2-7) of the hydraulic control valve A is communicated with the outer oil pipe (9);
an internal oil cavity (4-4) of the control valve block (4) is communicated with one end of a machine-controlled one-way valve (4-1); the other end of the mechanical control one-way valve (4-1) is communicated with the rodless cavity (7) of the oil cylinder;
the last-stage oil cylinder comprises a last-stage oil cylinder body (14), a last-stage oil cylinder piston (12) and a last-stage oil cylinder piston rod assembly (13) which are mutually connected are arranged in the last-stage oil cylinder body (14), and a last-stage oil cylinder front cover (15) is connected between the last-stage oil cylinder body (14) and the last-stage oil cylinder piston rod assembly (13); the end part of the last-stage oil cylinder piston rod assembly (13) is provided with a first oil port (13-1) of a last-stage oil cylinder and a second oil port (13-2) of the last-stage oil cylinder, and an oil pipe (13-3) of the last-stage oil cylinder and an oil chamber (13-4) of the last-stage oil cylinder are arranged inside the last-stage oil cylinder piston rod assembly; a final-stage oil cylinder piston (12) is provided with a final-stage oil cylinder center oil hole (12-1), and a final-stage oil cylinder oil hole (12-2) is arranged on the right end step of the final-stage oil cylinder piston; a first oil port (13-1) of the last-stage oil cylinder is communicated with an oil pipe (13-3) of the last-stage oil cylinder, a central oil hole (12-1) of the last-stage oil cylinder and a rodless cavity (16) of the last-stage oil cylinder, and a second oil port (13-2) of the last-stage oil cylinder is communicated with an oil cavity (13-4) of the last-stage oil cylinder, an oil hole (12-2) of the last-stage oil cylinder and a rod cavity (17) of;
a first cylinder body oil port (1-1) of each stage of telescopic oil cylinder is connected with a first piston rod oil port (2-1) of the next stage of telescopic oil cylinder through an external pipeline, and a first cylinder body oil port (1-1) of the last stage of telescopic oil cylinder is connected with a first oil port (13-1) of the last stage of oil cylinder through an external pipeline; a second cylinder body oil port (1-2) of each stage of telescopic oil cylinder is connected with a second piston rod oil port (2-2) of the next stage of telescopic oil cylinder through an external pipeline, and a second cylinder body oil port (1-2) of the last stage of telescopic oil cylinder is connected with a second oil port (13-2) of the last stage of oil cylinder through an external pipeline; the cylinder body (1) of each stage of telescopic cylinder is connected with the piston rod assembly (2) of the next stage of telescopic cylinder into a whole, and the cylinder body (1) of the last stage of telescopic cylinder is connected with the piston rod assembly (13) of the last stage of telescopic cylinder into a whole; the left ends of the middle-stage telescopic oil cylinders are provided with first control rods (10), the first control rods (10) are in contact with the machine control valve collision rods (4-1-7) of the upper-stage telescopic oil cylinders to control the machine control one-way valves of the upper-stage telescopic oil cylinders, and the left end of the last-stage oil cylinder is provided with a second control rod (11) which is in contact with the machine control valve collision rods (4-1-7) of the last-stage telescopic oil cylinders to control the machine control one-way valves of the last-stage telescopic oil cylinders.
2. The sequential telescopic oil cylinder with the novel control valve block according to claim 1, characterized in that the machine control one-way valve (4-1) comprises a machine control valve body (4-1-1), a machine control valve rod (4-1-2) is arranged in the machine control valve body (4-1-1), a machine control valve cover (4-1-3) is arranged between the machine control valve body (4-1-1) and the machine control valve rod (4-1-2), the front end of the machine control valve cover (4-1-3) is connected with a machine control valve front sleeve (4-1-5), the front end of the machine control valve front sleeve (4-1-5) is connected with a machine control valve baffle cover (4-1-6), the front end of the machine control valve rod (4-1-2) is connected with a machine control valve striking rod (4-1-7), the front end of a mechanical control valve collision rod (4-1-7) extends out of a mechanical control valve blocking cover (4-1-6), a mechanical control valve spring (4-1-4) is arranged between the rear end of a mechanical control valve rod (4-1-2) and a mechanical control valve body (4-1-1), a mechanical control valve C oil hole (4-1-8) is formed in a mechanical control valve front sleeve (4-1-5), and a mechanical control valve D oil hole (4-1-9) is formed in the end part of the mechanical control valve body (4-1-1); an internal oil cavity (4-4) of the control valve block (4) is communicated with an oil hole (4-1-8) of a machine control valve C of the machine control one-way valve (4-1); the oil hole (4-1-9) of the mechanical control valve D of the mechanical control one-way valve (4-1) is communicated with the rodless cavity (7) of the oil cylinder.
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| CN202021801366.6U CN213039545U (en) | 2020-08-26 | 2020-08-26 | Sequential telescopic oil cylinder with novel control valve block |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119508305A (en) * | 2024-10-12 | 2025-02-25 | 中联重科股份有限公司 | Telescopic cylinder, multi-cylinder sequential telescopic hydraulic system and telescopic engineering machinery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119508305A (en) * | 2024-10-12 | 2025-02-25 | 中联重科股份有限公司 | Telescopic cylinder, multi-cylinder sequential telescopic hydraulic system and telescopic engineering machinery |
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