Air-saving pressure shell air cylinder with stroke feedback

Abstract

The utility model discloses a pressure shell air cylinder with stroke feedback, the pressure shell air cylinder comprises an outer shell, a guide rod and a piston arranged at the rear end of the guide rod, the piston divides the outer shell into a rod cavity and a rodless cavity, a rear end cover is arranged at the rear end of the outer shell, an air inlet is arranged on the rear end cover, a magnetic ring is arranged at the tail end of the guide rod, and the magnetic ring is arranged on the guide rod. A magnetic ring matched with the displacement sensor is mounted on the rear end cover; the two-position five-way valve is communicated with the air inlet through an air path, the two-position five-way valve is further connected with a pilot electromagnetic valve, an air lock valve and a mechanical control valve through the air path, and the pilot electromagnetic valve is communicated with the air inlet; the shell is further provided with an air guide rod, and the air guide rod is communicated with the air lock valve and the rod cavity through an air path. The shell pressing air cylinder overcomes the defects in the prior art, the stroke of the shell pressing air cylinder is controllable, and the stroke of the air cylinder can be adjusted according to the electrolyte liquid level of an electrolytic cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shell pressing cylinder control, and specifically belongs to a throttle shell pressing cylinder with stroke feedback. BACKGROUND

[0002] The rod cavity of the normal pressure shell cylinder has gas, the striking hammer head is at the upper end of the shell pressing cylinder, and the striking hammer head is in a non-striking state. When a shell pressing control signal comes, the shell pressing signal passes through a control reversing valve to connect a control air source, the control air source controls the reversing valve, compressed air passes through an air pipeline to connect the rodless cavity of the cylinder, and the rod cavity is in exhaust. Under the action of the compressed air, the striking hammer head strikes the electrolyte liquid of the aluminum electrolysis cell. When there is no shell pressing control signal, the striking hammer head rises back to the non-striking state. The existing shell pressing cylinder does not form a closed loop system for the shell pressing signal, and can only process the shell pressing signal in an open and one-way manner. Moreover, the stroke of the striking hammer head is constant, and the striking hammer head performs a full-stroke shell pressing action each time, and the shell pressing stroke cannot be intelligently adjusted according to the liquid level. In addition, after the shell pressing action is completed, the striking hammer head cannot quickly return, and stays in the aluminum liquid for too long, thereby increasing the risk of "stick packet" and reducing the quality of primary aluminum. SUMMARY

[0003] The utility model aims at providing a throttle shell pressing cylinder with stroke feedback, which overcomes the shortcomings of the prior art.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A throttle shell pressing cylinder with stroke feedback, comprising:

[0006] A shell pressing cylinder, which comprises an outer shell, a guide rod, and a piston installed at the rear end of the guide rod. The piston divides the outer shell into a rod cavity and a rodless cavity. A rear end cover is installed at the rear end of the outer shell, and an air inlet is arranged on the rear end cover. The air inlet is connected to an air source. A magnetic ring is installed at the end of the guide rod. A magnetic ring is installed on the rear end cover and cooperates with a displacement sensor.

[0007] A two-position five-way valve is connected to the air inlet through an air path. The two-position five-way valve is also connected to a pilot electromagnetic valve, an air lock valve, and a machine control valve through an air path. The machine control valve is installed on the rear end cover.

[0008] The pilot electromagnetic valve is connected to the air inlet.

[0009] A gas guide rod is installed on the outer shell. The gas guide rod is connected to the air lock valve and the rod cavity through an air path.

[0010] The pilot electromagnetic valve and the displacement sensor are connected to a slot control machine through an electric circuit.

[0011] The air passage between the two-position five-way valve and the air inlet is further provided with a one-way valve.

[0012] The rear end cover is further provided with a mechanical lock valve, and a stop falling plunger is further arranged on the guide rod behind the piston and is arranged in cooperation with the mechanical lock valve.

[0013] The rear end cover is provided with a locking hole for mounting the locking head, the locking head is further provided with a sealing ring matched with the locking hole, the rear part of the locking head is provided with a stop falling plunger, the lower part of the locking hole is provided with a sliding hole matched with the stop falling plunger, the top end of the sliding hole is communicated with the air inlet, the inner diameter of the sliding hole is larger than that of the locking hole, the rear end of the stop falling plunger is provided with a locking spring, the locking spring can push the locking head into the clamping groove, and the rear end of the locking spring is provided with a sealing cover for closing the sliding hole.

[0014] The two-position five-way valve comprises a valve body and two first plug rods and second plug rods arranged in the valve body, the first plug rod and the second plug rod are respectively provided with a first piston, a second piston, a third piston and a fourth piston, the second piston and the third piston are respectively located at the upper part of the first plug rod and the second plug rod, and the first piston and the fourth piston are respectively located at the lower part of the first plug rod and the second plug rod, the first piston cavity, the second piston cavity, the third piston cavity and the fourth piston cavity for mounting the first piston, the second piston, the third piston and the fourth piston are arranged in the two-position five-way valve, the first piston cavity and the second piston cavity are communicated through a first channel, the first plug rod passes through the first channel, the fourth piston cavity and the third piston cavity are communicated through a second channel, the second plug rod passes through the second channel, the first piston cavity is provided with an air inlet communicated with the air inlet, the first channel is provided with an air inlet hole communicated with the rodless cavity, the first piston cavity is communicated with the fourth piston cavity through a first hole and an air inlet cavity arranged below the fourth piston cavity, and the fourth piston cavity is provided with a second hole communicated with the air lock valve.

[0015] The valve body outside the second piston and the third piston is further provided with a pressure cavity, the pressure cavity is provided with a pilot gas hole connected with a pilot electromagnetic valve, the right side surface of the two-position five-way valve is provided with an exhaust port, the exhaust port is communicated with the second piston cavity and the third piston cavity, and one spring is respectively arranged in the first piston cavity and the fourth piston cavity below the first piston and the fourth piston.

[0016] The air lock valve comprises a third plug rod installed in a first sliding cavity arranged in the air lock valve, a second sliding cavity arranged at the lower end of the first sliding cavity, a fifth piston arranged at the lower end of the third plug rod and capable of sealing the lower end of the first sliding cavity, the fifth piston being arranged in the second sliding cavity, a sealing body arranged below the fifth piston and capable of cooperating with the lower part of the fifth piston, and a cavity arranged in the sealing body and capable of communicating with the machine control valve.

[0017] The second sliding cavity is in communication with the second hole and the upper part of the sealing body, the inner wall of the first sliding cavity is provided with a third hole in communication with the air guide rod, the top of the first sliding cavity is connected with an exhaust port through an air channel, the top of the third plug rod is provided with a sixth piston, the sixth piston cooperates with the inner wall of the first sliding cavity, and the sixth piston is always arranged above the third hole, and an air lock spring is arranged between the top of the sixth piston and the top of the first sliding cavity.

[0018] The machine control valve comprises a top rod and a piston body arranged on the top rod, a rod cavity arranged in the rear end cover, a first air channel, a second air channel and a third air channel arranged on the rod cavity and in communication with the inside of the rod cavity, the first air channel being connected with the air inlet channel through an air path, the second air channel being in communication with the cavity, the third air channel being connected with the exhaust port, the rear part of the top rod being provided with a machine control spring and an end cover for sealing the rear end of the rod cavity, the top rod penetrating through the rear end cover, and the top end of the top rod cooperating with the rear end of the piston.

[0019] Compared with the prior art, the implementation effect of the utility model is as follows:

[0020] 1. The stroke of the shell pressing cylinder is controllable, and the stroke of the cylinder can be adjusted according to the electrolyte liquid level of the electrolytic tank.

[0021] 2. The hammer head on the guide rod returns quickly after successfully hitting the shell, the residence time of the hammer head in the aluminum liquid is greatly shortened each time, the probability of "sticking package" and "package jamming" is reduced, the hammer head consumption is reduced, and the service life is prolonged.

[0022] 3. The hammer head on the guide rod returns to the preset position, and does not need to run the full stroke; the pressure required for hitting the shell is related to the shell surface thickness, the thinner the shell surface, the lower the required pressure, and the less the gas consumption; the shell pressing cylinder only needs very low pressure to lift the hammer head, and the hammer head can be kept from falling under low air pressure.

[0023] 4. The air lock valve of the shell pressing cylinder can close the third hole after the guide rod is retracted, avoid the pressure relief of the rod cavity, keep the hammer head in the retracted state, and does not need to supply air to the rod cavity all the time, thereby saving the gas consumption. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view of the utility model;

[0025] Figure 2It is the right view of the utility model;

[0026] Figure 3 It is the sectional view of the utility model;

[0027] Figure 4 It is the sectional view of the machine control valve of the utility model;

[0028] Figure 5 It is the sectional view of the mechanical lock;

[0029] Figure 6 It is the sectional view of the two-position five-way valve and the air lock valve after being connected.

[0030] The figure mark explanation: 1, the shell; 10, the gas guide rod; 11, the guide rod; 12, the piston; 13, the stopper plunger; 14, the corrugated sheet; 2, the rear end cover; 21, the air inlet; 3, the displacement sensor; 31, the magnetic ring; 4, the pilot electromagnetic valve; 5, the machine control valve; 51, the top rod; 52, the piston body; 53, the end cover; 54, the machine control spring; 55, the second air passage; 56, the third air passage; 57, the first air passage; 6, the two-position five-way valve; 61, the first piston; 62, the second piston; 63, the third piston; 64, the fourth piston; 601, the air inlet; 602, the first hole channel; 603, the air inlet hole; 604, the air inlet cavity; 605, the second hole channel; 606, the second passage; 607, the first piston cavity; 608, the first passage; 609, the pressure cavity; 610, the exhaust port; 600, the gas guide hole; 7, the air lock valve; 71, the third plug rod; 72, the sixth piston; 73, the fifth piston; 74, the sealing body; 75, the air lock spring; 701, the cavity; 702, the third hole channel; 8, the machine lock valve; 81, the sealing cover; 82, the locking spring; 83, the stopper piston; 84, the sliding hole; 85, the locking head. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model to having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0033] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium. For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model according to specific circumstances.

[0034] As Figures 1-6 The utility model discloses a stroke feedback's gas cylinder of pressure shell, including pressure shell, the pressure shell includes shell 1, guide rod 11 and installs the piston 12 of guide rod 11 rear end, the front end of shell 1 is equipped with front end cover, and the rear end of shell 1 is equipped with rear end cover 2, and the front end cover and rear end cover 2 close the both ends of shell 1, and guide rod 11 is installed in shell 1 through piston 12, and the top end of guide rod 11 passes through the front end cover, and piston 12 divides the inside of shell 1 into two parts, and the side of front end cover is rod cavity, and the side of rear end cover 2 is rodless cavity.

[0035] The shell 1 of pressure shell is also equipped with guide rod 10, and the side surface of rear end cover 2 is equipped with gas lock valve 7 and two-position five-way valve 6, and guide rod 10 is connected with the third hole 702 of gas lock valve 7, and guide rod 10 can make the third passage and the rod cavity of shell 1 communicate, so that gas enters the inside of shell 1 in front of piston 12. Two-position five-way valve 6 is connected with the air inlet 21 arranged on rear end cover 2 through gas circuit, the air inlet 21 is connected with gas source, and two-position five-way valve 6 is also connected with pilot electromagnetic valve 4, gas lock valve 7 and machine control valve 5 through gas circuit, machine control valve 5 is installed on rear end cover 2, and machine control valve 5 is communicated with two-position five-way valve 6 and gas lock valve 7 through gas circuit.

[0036] The end of guide rod 11 is equipped with magnetic ring 31, and rear end cover 2 is equipped with magnetic ring 31 matched with displacement sensor 3, magnetic ring 31 is installed on the end of guide rod 11 through mounting block, and rear end cover 2 is equipped with wave sheet 14 matched with mounting block, and wave sheet 14 has buffering effect. Pilot electromagnetic valve 4 and displacement sensor 3 are connected with groove control machine through circuit.

[0037] The rear end cover 2 is further provided with a machine lock valve 8, and the guide rod 11 behind the piston 12 is further provided with a drop stopping plunger 13 matched with the machine lock valve 8. The machine lock valve 8 comprises a telescopic locking head 85, and the drop stopping plunger 13 is provided with a clamping groove matched with the locking head 85. The rear end cover 2 is provided with a locking hole for installing the locking head 85, and the locking head 85 is further provided with a sealing ring matched with the locking hole. The rear part of the locking head 85 is provided with a drop stopping plunger 83, and the lower part of the locking hole is provided with a sliding hole 84 matched with the drop stopping plunger 83. The top end of the sliding hole 84 is communicated with the air inlet 21, and the inner diameter of the sliding hole 84 is larger than that of the locking hole. The rear end of the drop stopping plunger 83 is provided with a locking spring 82, which can push the locking head 85 into the clamping groove. The rear end of the locking spring 82 is provided with a sealing cover 81 for closing the sliding hole 84.

[0038] The air inlet 21 is connected with the two-position five-way valve 6 through an air path, and a one-way valve for supplying air to the two-position five-way valve 6 is installed on the air path between the air inlet 21 and the two-position five-way valve 6. The one-way valve can prevent the two-position five-way valve 6 from losing pressure when the air source is cut off, so that the air lock valve 7 remains closed, the rod cavity cannot be exhausted, and the hammer head on the guide rod 11 cannot be extended under the action of gravity.

[0039] It needs to be explained that two five-way valve 6 is the two five-way valve in the prior art, directly purchased, in order to clearly illustrate the working process of the shell pressing cylinder, the structure of two five-way valve 6 is described as follows, two five-way valve 6 includes valve body and two first plug rod and second plug rod arranged in the valve body, first plug rod and second plug rod are respectively provided with first piston 61, second piston 62, third piston 63 and fourth piston 64, second piston 62 and third piston 63 are respectively located at the upper part of first plug rod and second plug rod, first piston 61 and fourth piston 64 are respectively located at the lower part of first plug rod and second plug rod, first piston chamber 607, second piston chamber, third piston chamber and fourth piston chamber for installing first piston 61, second piston 62, third piston 63 and fourth piston 64 are arranged in two five-way valve 6, first piston chamber 607 and second piston chamber are communicated through first channel 608, first plug rod passes through first channel 608, fourth piston chamber and third piston chamber are communicated through second channel 606, second plug rod passes through second channel 606, first piston chamber 607 is provided with air inlet channel 601 communicated with air inlet 21, first channel 608 is provided with air inlet hole 603 communicated with rodless chamber, first piston chamber 607 is communicated with fourth piston chamber through first hole channel 602 and air inlet chamber 604 arranged below fourth piston chamber, fourth piston chamber is provided with second hole channel 605 connected with airlock valve 7; Second piston 62 and third piston 63 outside the valve body are further provided with pressure chamber 609, pressure chamber 609 is provided with pilot gas hole 600 connected with pilot electromagnetic valve 4, the right side of two five-way valve 6 is provided with exhaust port 610, exhaust port 610 is communicated with second piston chamber and third piston chamber, first piston 61 and fourth piston 64 below first piston chamber 607 and fourth piston chamber are respectively installed with a spring. When two five-way valve 6 is in initial state, under the action of spring force, first piston 61 closes the lower end of first channel 608, and fourth piston 64 closes the lower end of second channel 606.

[0040] The air lock valve 7 comprises a third plug rod 71 installed in a first sliding cavity provided in the air lock valve 7, the lower end of the first sliding cavity is provided with a second sliding cavity, the lower end of the third plug rod 71 is provided with a fifth piston 73 capable of sealing the lower end of the first sliding cavity, the fifth piston 73 is arranged in the second sliding cavity, the lower part of the fifth piston 73 is provided with a sealing body 74 matched with the lower part of the fifth piston 73, the sealing body 74 is provided with a cavity 701 communicated with the machine control valve 5, the inner wall of the cavity 701 is matched with the outer wall of the fifth piston 73; the second hole 605 is communicated with the second sliding cavity above the sealing body 74, the inner wall of the first sliding cavity is provided with a third hole 702 communicated with the air guide rod 10; the top of the first sliding cavity is communicated with the exhaust port 610 through an air passage, the top of the third plug rod 71 is provided with a sixth piston 72 matched with the inner wall of the first sliding cavity, and the sixth piston 72 is always located above the third hole 702; the top of the sixth piston 72 and the top of the first sliding cavity are further provided with an air lock spring 75. When the air lock valve 7 is in the initial state, the fifth piston 73 seals the bottom of the first sliding cavity, and the gas in the rod cavity cannot be discharged through the air lock valve 7.

[0041] The machine control valve 5 comprises a top rod 51 and a piston body 52 installed on the top rod 51, a rod cavity is arranged in the rear end cover 2, the rod cavity is provided with a first air passage 57, a second air passage 55 and a third air passage 56 communicated with the inside of the rod cavity, the first air passage 57 is communicated with the air inlet passage 601 through an air path, the second air passage 55 is communicated with the cavity 701, the third air passage 56 is connected with the exhaust port 610, the rear part of the top rod 51 is installed with a machine control spring 54 and an end cover 53 sealing the rear end of the rod cavity, the top rod 51 passes through the rear end cover 2, and the top end of the top rod 51 is matched with the rear end of the piston 12.

[0042] The shell pressing cylinder in the initial state, the air inlet 21 to the air inlet 601 of the two five-way valve 6, under the action of the spring force, the first piston 61 will close the lower end of the first channel 608, the fourth piston 64 will close the lower end of the second channel 606, and under the extrusion of the piston 12, the piston body 52 retracts to connect the second air channel 55 and the first air channel 57, the cavity 701 is connected with the air source, and the fifth piston 73 keeps the lower end of the first sliding cavity closed, so that the front end of the guide rod 11 is installed in the retracted state; When the slot control machine sends a shell hitting signal, the pilot electromagnetic valve 4 is powered, the pressure cavity 609 of the two five-way valve 6 is supplied with air, the second piston 62 and the third piston 63 are pressed, the first piston rod drives the first piston 61 and the second piston 62, the second piston rod drives the third piston 63 and the fourth piston 64 to move downward (it should be noted that the cross-sectional size of the second piston 62 and the third piston 63 of the prior art two five-way valve and the first piston 61 and the fourth piston 64 is different, although the pressure cavity 609 and the pressure at the air inlet 601 are the same, the first piston rod and the second piston rod can still move downward), the second piston 62 closes the upper end of the first channel 608, and the fourth piston 64 closes the air inlet cavity 604, at this time the air source of the air inlet 601 enters the air inlet hole 603, reaches the rodless cavity, and the fourth piston 64 closes the air inlet cavity 604, the second hole 605 is connected with the exhaust port 610 through the fourth piston cavity and the second channel 606, so that the rod cavity exhausts, the rodless cavity continues to inflate, the piston 12 moves to the front cover direction, realizes the pushing out of the guide rod 11; After the piston 12 moves, the top rod 51 of the machine control valve 5 extends under the action of the machine control spring 54, the sealing body 74 is displaced, the third air channel 56 and the second air channel 55 are connected, the cavity 701 is connected with the exhaust port through the third air channel 56, the fifth piston 73 obtains the power to move downward under the action of the airlock spring 75, the airlock spring 75 pushes the third piston rod 71 to move downward, the fifth piston 73 opens the lower part of the first sliding cavity, the third hole 702 is connected with the exhaust port 610 in turn through the first sliding cavity, the second sliding cavity, the second hole 605, the fourth piston cavity and the second channel 606, and the rod cavity is exhausted.With the guide rod 11 with the hammer head down, the distance between the magnetic ring 31 and displacement sensor 3 change, displacement sensor 3 signal change when reach specified depth, slot control machine makes the pilot solenoid valve 4 power off, pressure chamber 609 lose pressure, two five-way valve 6 first piston 61, second piston 62, third piston 63 and fourth piston 64 reset, intake hole 603 is communicated with exhaust port 610, the air source of intake passage 601 in turn through the first hole 602, intake chamber 604, fourth piston cavity, second hole 605, second slide cavity, first slide cavity, third hole 702 and guide rod 10 to the rod cavity inflation, the piston drives guide rod 11 to the rod cavity moves, when piston 12 moves to the rod cavity bottom end, piston 12 compression top rod 51, piston body 52 will second airway 55 and first airway 57 are communicated, cavity 701 again pressurization, the fifth piston 73 reseals the lower end of first slide cavity, while piston 12 also returns to the initial state, i.e. the pressure shell cylinder recovers to the initial state.

[0043] In addition, in the process of starting to inflate the rod cavity, due to the airlock spring 75 and the exhaust pressure of the rod cavity, the fifth piston 73 at the lower end of the first slide cavity will be pushed, realizing the exhaust of the initial process of the rod cavity.

[0044] The pressure shell cylinder is provided with a mechanical lock, when the intake port 21 has pressure, the locking head 85 of the mechanical lock is in the retracted state, and the pressure shell cylinder can be freely extended and retracted, when the air source of the intake port 21 is cut off, the one-way valve is closed, and the rod cavity cannot exhaust gas in reverse; and due to the pressure of the intake port 21, the locking head 85 of the mechanical lock is extended to block the stopper plunger 13, so that the guide rod 11 cannot move, and locking is realized. But when the pressure shell cylinder is hung from the upper part of the electrolytic cell, the one-way valve and the mechanical lock double insurance, the hammer head on the guide rod 11 falls and causes an accident.

[0045] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stroke feedback belt pressure shell cylinder characterized by, include: A press-shell cylinder includes a shell, a guide rod, and a piston installed at the rear end of the guide rod. The piston divides the shell into a rod chamber and a rodless chamber. A rear end cover is installed on the rear end of the shell. An air inlet is provided on the rear end cover and connected to an external air source. A magnetic ring is installed at the end of the guide rod. A magnetic ring that cooperates with a displacement sensor is installed on the rear end cover. Two-position five-way valve, which is connected to the air inlet through an air passage, and is also connected to a pilot solenoid valve, an air lock valve and a mechanical control valve through an air passage. The mechanical control valve is installed on the rear end cover. The pilot solenoid valve is connected to the air inlet; The outer casing is also equipped with an air guide rod, which is connected to the air lock valve and the rod chamber through an air passage; The pilot solenoid valve and displacement sensor are connected to an external slot controller via a circuit.

2. A ported pressure shell cylinder with stroke feedback according to claim 1, characterized in that, A one-way valve is also installed in the air passage between the two-position five-way valve and the air inlet.

3. A ported pressure shell cylinder with stroke feedback as defined in claim 1, wherein, The rear end cover is also equipped with a mechanical lock valve, and the guide rod behind the piston is also equipped with a stop-fall plunger that cooperates with the mechanical lock valve. The mechanical lock valve includes a retractable locking head, and the stop-fall plunger is provided with a groove that cooperates with the locking head. The mechanical lock valve is connected to the air inlet.

4. A ported pressure shell cylinder with stroke feedback according to claim 3, characterized in that, The rear end cover is provided with a locking hole for installing a locking head. The locking head is also provided with a sealing ring that mates with the locking hole. A stop piston is provided at the rear of the locking head. A sliding hole that mates with the stop piston is provided at the lower part of the locking hole. The top of the sliding hole is connected to the air inlet. The inner diameter of the sliding hole is larger than the inner diameter of the locking hole. A locking spring is installed at the rear end of the stop piston. The locking spring can push the locking head into the slot. A sealing cover that closes the sliding hole is installed at the rear end of the locking spring.

5. A trunk cylinder with stroke feedback according to claim 1 or 2, characterized in that The two-position five-way valve includes a valve body and two first and second stopes disposed within the valve body. The first and second stopes are respectively provided with a first piston, a second piston, a third piston, and a fourth piston. The second and third pistons are located at the upper parts of the first and second stopes, and the first and fourth pistons are located at the lower parts of the first and second stopes, respectively. The two-position five-way valve has a first piston chamber, a second piston chamber, a third piston chamber, and a fourth piston chamber for mounting the first, second, third, and fourth pistons. The first and second piston chambers are connected by a first channel, through which the first stope passes. The fourth and third piston chambers are connected by a second channel, through which the second stope passes. The first piston chamber has an air inlet channel communicating with an air inlet. The first channel has an air inlet hole communicating with a rodless chamber. The first piston chamber is connected to the fourth piston chamber through a first channel and an air inlet chamber located below the fourth piston chamber. The fourth piston chamber has a second channel connecting to an air lock valve. The valve body outside the second and third pistons is also provided with a pressure chamber. The pressure chamber is provided with a vent hole for connecting the pilot solenoid valve. The right side of the two-position five-way valve is provided with an exhaust port. The exhaust port is connected to the second piston chamber and the third piston chamber. A spring is installed in the first piston chamber and the fourth piston chamber below the first piston and the fourth piston, respectively.

6. A ported pressure shell cylinder with stroke feedback according to claim 5, characterized in that, The air lock valve comprises a third plug rod installed in a first sliding cavity arranged in the air lock valve, a second sliding cavity arranged at the lower end of the first sliding cavity, a fifth piston arranged at the lower end of the third plug rod and capable of sealing the lower end of the first sliding cavity, the fifth piston being arranged in the second sliding cavity, a sealing body arranged below the fifth piston and capable of cooperating with the lower part of the fifth piston, and a cavity arranged in the sealing body and capable of communicating with the machine control valve; The second hole communicates with the second sliding cavity above the sealing body, a third hole is arranged on the inner wall of the first sliding cavity and capable of communicating with the air guide rod, the top of the first sliding cavity is connected with an exhaust port through an air passage, the top of the third plug rod is provided with a sixth piston, the sixth piston cooperates with the inner wall of the first sliding cavity, and the sixth piston is always arranged above the third hole, and an air lock spring is arranged between the top of the sixth piston and the top of the first sliding cavity.

7. A ported pressure shell cylinder with stroke feedback according to claim 6, characterized in that The machine control valve comprises a top rod and a piston body installed on the top rod, a rod cavity is arranged in the rear end cover, the rod cavity is provided with a first air passage, a second air passage and a third air passage which communicate with the inside of the rod cavity, the first air passage communicates with the air inlet passage through an air path, the second air passage communicates with the cavity, the third air passage is connected with the exhaust port, the rear part of the top rod is provided with a machine control spring and an end cover which seals the rear end of the rod cavity, the top rod passes through the rear end cover, and the top end of the top rod cooperates with the rear end of the piston.

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