CN214027087U - Hydraulic PTFE pipe pushing machine - Google Patents
Hydraulic PTFE pipe pushing machine Download PDFInfo
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- CN214027087U CN214027087U CN202023069169.2U CN202023069169U CN214027087U CN 214027087 U CN214027087 U CN 214027087U CN 202023069169 U CN202023069169 U CN 202023069169U CN 214027087 U CN214027087 U CN 214027087U
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Abstract
A kind of hydraulic PTFE tube extruder, including the feed cylinder used for containing PTFE material, the outlet end of the said feed cylinder is equipped with the die head, the said feed cylinder inlet end is equipped with a push rod used for pushing and extruding the PTFE material contained in the said feed cylinder through the said die head, one end of the said push rod penetrates into the said feed cylinder, and carry on the hermetic connection with the said feed cylinder, its another end is connected with linear drive unit, make it reciprocate linearly along the axial of feed cylinder in the said feed cylinder, the said hydraulic PTFE tube extruder also includes a hydraulic oil piping system, the said hydraulic oil piping system includes: the self-locking hydraulic cylinder comprises an oil tank, an oil pump, a first reversing valve and a self-locking oil way, the self-locking function of the hydraulic cylinder can be realized by the aid of the pushing and extruding machine of a hydraulic system, and meanwhile oil pressure in the oil way can be effectively stabilized.
Description
Technical Field
The utility model relates to a PTFE pipe shaping field, specific hydraulic pressure PTFE pipe that relates to pushes away the PTFE material into tubular product through hydraulic system pushes away the extruder.
Background
At present, PTFE pushing machines are mainly applied to the fields of producing PTFE hollow tubes, PTFE films, PTFE leads and the like. The die head is installed in the export of feed cylinder including the feed cylinder, and a push rod is worn to be equipped with in the import play of feed cylinder, and the push rod pushes away the material within the feed cylinder from the die head and extrudes to the product is gone out in the shaping, and operating personnel can change different die heads according to the production product.
The linear reciprocating movement of the push rod in the charging barrel is usually driven by a screw rod or a single hydraulic cylinder, but the screw rod is greatly abraded in the working process, and the service life is short; single pneumatic cylinder wearing and tearing are less at the in-process of drive, and life has effectually increased once, but, often have when single pneumatic cylinder drives to have the pressure requirement of continuation to the pneumatic cylinder higher, need have comparatively stable pressure to carry and just can guarantee that the PTFE pipe keeps less tolerance at fashioned in-process pipe wall thickness, moreover, when the oil pump cuts off the power supply suddenly or breaks down and can not smoothly provide the working oil, because the pneumatic cylinder has the load, has leaded to the sudden return of pneumatic cylinder very easily, causes the accident of production to appear easily.
Therefore, the oil circuit system of the hydraulic cylinder needs to be improved so as to better meet daily production requirements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic pressure PTFE pipe pushes away extruder has solved the pneumatic cylinder and can realize automatic locking to and push away extruder at the stable output working oil of pneumatic cylinder at the in-process of work, concrete technique as follows.
A kind of hydraulic PTFE tube pushing extruder, including the feed cylinder used for containing PTFE supplies, the outlet end of the said feed cylinder is equipped with the die head, the said feed cylinder inlet end is equipped with a push rod used for pushing and squeezing the PTFE supplies such as installing in the said feed cylinder out through the said die head, one end of the said push rod penetrates into the said feed cylinder, and carry on the hermetic connection with the said feed cylinder, its another end is connected with linear drive unit, make it can be along the axial straight reciprocating motion of the feed cylinder in the said feed cylinder, wherein, the said linear drive unit is a hydraulic cylinder group formed by first fluid cylinder and second fluid cylinder set up side by side, the front end of piston rod of the said first fluid cylinder and second fluid cylinder connects with a connecting plate, the said connecting plate is fixedly connected with the said push rod;
the hydraulic PTFE pipe pushing and extruding machine also comprises a hydraulic oil circuit system,
the hydraulic oil circuit system comprises: the oil pump is communicated with the oil tank, the oil outlet of the oil pump is communicated with the oil inlet P of the first reversing valve, the oil return port T of the first reversing valve is communicated with the oil tank, the first working oil port A of the first reversing valve is communicated with the rod cavities of the first hydraulic cylinder and the second hydraulic cylinder, and the second working oil port B of the first reversing valve is communicated with the rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder;
the self-locking oil way is connected in series and comprises a second reversing valve and a double hydraulic control one-way valve, a first working oil port A 'and a second working oil port B' of the second reversing valve are respectively communicated with two oil inlets of the double hydraulic control one-way valve, a first oil outlet of the double hydraulic control one-way valve is communicated with rod cavities of the first hydraulic cylinder and the second hydraulic cylinder, a second oil outlet of the double hydraulic control one-way valve is communicated with rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder, an oil inlet P 'of the second reversing valve is communicated with an oil inlet P of the first reversing valve, and an oil return port T' of the second reversing valve is communicated with an oil tank.
Preferably, an oil outlet of the oil pump is communicated with an overflow valve, and an oil outlet of the overflow valve is connected to the oil tank in a return mode.
Preferably, the hydraulic oil circuit system further comprises a pressure maintaining oil circuit, an oil inlet of the pressure maintaining oil circuit is connected with an oil circuit between the first reversing valve and the oil pump, an oil outlet of the pressure maintaining oil circuit is connected to the oil tank in a returning mode, and the pressure maintaining oil circuit is connected in series with two ball valve switches and an energy accumulator located between the two ball valve switches.
Preferably, a one-way valve is further arranged on an oil path of the oil outlet of the oil pump, and the oil outlet of the oil pump is communicated with the oil inlet P of the first reversing valve through the one-way valve.
Preferably, the first reversing valve is an O-shaped three-position four-way reversing valve.
Preferably, the second reversing valve is a Y-shaped three-position four-way reversing valve.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses an oil piping system is located and is provided with an overflow valve between the oil inlet of oil pump oil-out and first switching-over valve, and among the oil-out tieback of overflow valve arrived the oil tank, can make the working oil pressure that should in the middle of the oil circuit can not be too high, can realize the pressure protection effect of oil circuit. Meanwhile, the oil circuit system is also provided with a self-locking oil circuit which adopts a mode that a second reversing valve and a double-hydraulic-control one-way valve are connected in series, so that when the equipment is powered off suddenly, the double-hydraulic-control one-way valve can block an oil circuit for the working oil of a rodless cavity of the hydraulic cylinder group to flow back to an oil tank, and the hydraulic cylinder group is automatically locked. Meanwhile, a pressure maintaining oil path is further arranged in the oil path system, the accumulator is communicated with the hydraulic cylinder group through opening and closing of a ball valve switch, when the oil pump stops acting, the accumulator can release the pressure in the oil path, and the pressure loss caused by leakage in the oil path is compensated.
The invention is further described with reference to the drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a hydraulic schematic diagram of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, a hydraulic PTFE tube extruder includes a cylinder 100 for containing PTFE material, a die head 101 is installed at an outlet end of the cylinder 100, a push rod 102 for pushing the PTFE material contained in the cylinder 100 out through the die head 101 is installed at an inlet end of the cylinder 100, one end of the push rod 102 penetrates into the cylinder 100 and is connected to the cylinder 100 in a sealing manner, and the other end of the push rod 102 is connected to a linear driving device so as to be linearly reciprocated along an axial direction of the cylinder 100 in the cylinder 100, wherein the linear driving device is a hydraulic cylinder set 200 having a first hydraulic cylinder 201 and a second hydraulic cylinder 201 arranged in parallel, a connecting plate 203 is connected to front ends of piston rods of the first hydraulic cylinder 201 and the second hydraulic cylinder 202, and the connecting plate 203 is fixedly connected to the push rod 102.
In order to make the connecting plate 203 run forward smoothly when the hydraulic cylinder set 200 pushes, a sliding rod 103 is further disposed on the connecting plate 203 and is fixedly installed with a linear bearing 104 for passing through, one end of the sliding rod 103 passes through the linear bearing 104, and the other end is fixedly installed on the frame plate 105, when the hydraulic cylinder set 200 pushes the connecting plate 203 forward, the connecting plate 203 drives the push rod 102 to move forward on the sliding rod 103, so that the push rod 102 pushes the material located in the charging barrel 100, and pushes and extrudes the material in the die head 101 to form a corresponding pipe.
Fig. 2 shows a hydraulic oil circuit system of a hydraulic PTFE tube extruder.
This oil piping system includes: the hydraulic control system comprises an oil tank 300, an oil pump 301, a first reversing valve 302 and a self-locking oil way 400, wherein the first reversing valve 302 is an O-shaped three-position four-way reversing valve, an oil inlet of the oil pump 301 is communicated with the oil tank 300, an oil outlet of the oil pump 301 is communicated with an oil inlet P of the first reversing valve 302, an oil return port T of the first reversing valve 301 is communicated with the oil tank 300, a first working oil port A of the first reversing valve 302 is communicated with rod cavities of first and second hydraulic cylinders, and a second working oil port B of the first reversing valve 302 is communicated with rodless cavities of the first and second hydraulic cylinders;
the self-locking oil way 400 is connected in series and comprises a second reversing valve 401 and a double hydraulic control one-way valve 402, wherein the second reversing valve 401 is a Y-shaped three-position four-way reversing valve, a first working oil port A 'and a second working oil port B' of the second reversing valve 401 are respectively communicated with two oil inlets of the double hydraulic control one-way valve 402, a first oil outlet of the double hydraulic control one-way valve 402 is communicated with rod cavities of a first hydraulic cylinder and a second hydraulic cylinder, a second oil outlet of the double hydraulic control one-way valve 402 is communicated with rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder, an oil inlet P 'of the second reversing valve 401 is communicated with an oil inlet P of the first reversing valve 302, and an oil return port T' of the second reversing valve 401 is communicated with an oil tank.
Wherein, when the extruder outage, oil pump 301 stops to carry out the fuel feed to hydraulic cylinder group 200, and the working oil of hydraulic cylinder group 200 and oil circuit the inside flows back to oil tank 300, and at this moment, the electro-magnet of first switching-over valve 302 and second switching-over valve 401 is all deenergized, and double hydraulic control check valve 402 will block the oil circuit that has the pole chamber and no pole chamber of hydraulic cylinder group 200, makes the working oil that has the pole chamber and no pole chamber all flow equally, makes hydraulic cylinder group 200 realize the position lock.
Further, an oil outlet of the oil pump 301 is communicated with an overflow valve 303, an oil outlet of the overflow valve 303 is returned to the oil tank 300, and an oil path between the first directional valve 302 and the oil pump 301 is further connected with a pressure maintaining oil path, an oil inlet of the pressure maintaining oil path is connected with the oil path, and an oil outlet of the pressure maintaining oil path is returned to the oil tank 300, wherein the pressure maintaining oil path comprises two ball valve switches 305 and an energy accumulator 306 connected between the two ball valve switches 305.
When the oil pump 301 supplies oil into the hydraulic system, the overflow valve 303 connected to the oil outlet of the oil pump 301 can limit the oil pressure of the working oil at the oil outlet of the oil pump 301, and when the oil pressure exceeds the preset value of the overflow valve 303, the overflow valve 303 conducts to discharge a part of the working oil at the oil outlet of the oil pump 301 into the oil tank 300, so that the oil pressure in the hydraulic system is stable. When the oil pump 301 stops operating and the hydraulic cylinder group 200 stops operating to perform pressure holding, in order to prevent the pressure in the oil path from being reduced due to leakage, the ball valve switch 305 in the pressure holding oil path, which is close to the first direction changing valve 302, is opened, so that the accumulator 306 communicates with the hydraulic system, and the hydraulic cylinder group 200 is supplied with working oil and the required pressure is ensured.
Further, a one-way valve 307 is further arranged on an oil path of an oil outlet of the oil pump 301, the oil outlet of the oil pump 301 is communicated with an oil inlet P of the first reversing valve 302 through the one-way valve 307, and the one-way valve 307 can effectively prevent the working oil from flowing back to the inside of the oil pump 301.
The embodiment of the utility model provides a working process as follows:
the hydraulic cylinder group 200 pushes materials to process: the oil pump 301 is started, the electromagnets Y2 and Y4 are powered on to operate at the same time, the oil pump 301 sucks working oil from the oil tank 300 and supplies the working oil to the rodless cavity of the hydraulic cylinder group 200 through the second working oil port B of the first reversing valve 301, meanwhile, the working oil is also supplied to the rodless cavity of the hydraulic cylinder through the double-hydraulic control one-way valve 402 at the second working oil port B' of the second reversing valve 401, the working oil is conveyed through the two oil pipes when the working oil is supplied to the rodless cavity of the hydraulic cylinder group 200, the oil conveying pressure of one pipeline can be shared, and the piston rod of the hydraulic cylinder group 200 can be more stable when extending out, so that the piston rod of the hydraulic cylinder group 200 can extend out more stably, the connecting plate 203 is pushed to push the push rod 102 into the material barrel 100, and the material in the material barrel 100 is pushed and processed; the working oil in the rod chamber flows back into the oil tank 300 after passing through the first working port a of the first direction valve 302.
When the piston rod of the hydraulic cylinder retracts: the oil pump 301 is started, the electromagnets Y1 and Y3 are powered on simultaneously to operate, after the oil pump 301 sucks the working oil in the oil tank 300, the working oil is conveyed into the rod cavity of the hydraulic cylinder group 200 through the first working oil port a of the first directional valve 302, meanwhile, the working oil is also conveyed into the rod cavity of the hydraulic cylinder group 200 through the first working oil port a' of the second directional valve 401, the working oil is conveyed through the two oil pipes when the working oil is supplied to the rod cavity of the hydraulic cylinder group 200, the oil conveying pressure of one pipe can be shared, and the piston rod of the hydraulic cylinder group 200 can be more stable when retracting, at this time, the working oil in the rodless cavity of the hydraulic cylinder flows back to the oil tank through the second working oil port B of the first directional valve 302, so that the piston rod of the hydraulic cylinder retracts.
Self-locking of the hydraulic cylinder group 200: when equipment outage, the electro-magnet of oil pump 301 and first and second switching-over valve all cuts off the power supply, but hydraulic cylinder group 200 still bears the load, can make the piston rod return to no pole chamber direction, at this moment, the working fluid port of first switching-over valve 302 all closes, a pair of hydraulic control check valve 402 has among the auto-lock oil circuit 400, make all the shutoff of oil circuit with no pole chamber, and simultaneously, the oil circuit that also will have the pole chamber has carried out the shutoff, can make the working oil within the no pole chamber can not flow back to oil tank 300, lock hydraulic cylinder group 200.
When the hydraulic cylinder group 200 performs pressure holding: when the hydraulic cylinder group 200 pushes the push rod 102 into the cylinder 100 and stops at a position, and the material in the cylinder 100 is subjected to pressure maintaining for a period of time, the oil pump 301 stops to keep the piston rod of the hydraulic cylinder group 200 in a stationary state at a position, at this time, due to the fact that leakage may exist in the oil path, the oil pressure in the oil path is lowered, and the pressure maintaining process procedure on the material is affected, at this time, the ball valve switch 305 close to the first direction valve 302 is opened, so that the working oil in the energy accumulator 306 is communicated with the rod-free cavity of the hydraulic cylinder group 200 through the first direction valve 302 and the second direction valve 401, and pressure compensation is performed on the working oil, and the hydraulic cylinder group 200 has continuous and stable working oil to complete the pressure maintaining process procedure.
Various other modifications and alterations of the disclosed structure and principles may occur to those skilled in the art, and all such modifications and alterations are intended to be included within the scope of the present invention.
Claims (6)
1. A kind of hydraulic PTFE tube pushing extruder, including the feed cylinder used for containing PTFE supplies, the outlet end of the said feed cylinder is equipped with the die head, the said feed cylinder inlet end is equipped with a push rod used for pushing and squeezing PTFE supplies contained in the said feed cylinder out through the said die head, one end of the said push rod penetrates into the said feed cylinder, and carry on the hermetic connection with the said feed cylinder, its another end is connected with linear drive unit, make it can be along the axial straight reciprocating motion of the feed cylinder in the said feed cylinder, characterized by that, the said linear drive unit is a fluid cylinder group formed by first fluid cylinder and second fluid cylinder set up side by side, the front end of piston rod of the said first fluid cylinder and second fluid cylinder connects with a connecting plate, the said connecting plate is fixedly connected with the said push rod;
the hydraulic PTFE pipe pushing and extruding machine also comprises a hydraulic oil circuit system,
the hydraulic oil circuit system comprises: the oil pump is communicated with the oil tank, the oil outlet of the oil pump is communicated with the oil inlet P of the first reversing valve, the oil return port T of the first reversing valve is communicated with the oil tank, the first working oil port A of the first reversing valve is communicated with the rod cavities of the first hydraulic cylinder and the second hydraulic cylinder, and the second working oil port B of the first reversing valve is communicated with the rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder;
the self-locking oil way is connected in series and comprises a second reversing valve and a double hydraulic control one-way valve, a first working oil port A 'and a second working oil port B' of the second reversing valve are respectively communicated with two oil inlets of the double hydraulic control one-way valve, a first oil outlet of the double hydraulic control one-way valve is communicated with rod cavities of the first hydraulic cylinder and the second hydraulic cylinder, a second oil outlet of the double hydraulic control one-way valve is communicated with rodless cavities of the first hydraulic cylinder and the second hydraulic cylinder, an oil inlet P 'of the second reversing valve is communicated with an oil inlet P of the first reversing valve, and an oil return port T' of the second reversing valve is communicated with an oil tank.
2. The hydraulic PTFE tube pushing and extruding machine as recited in claim 1, wherein an oil outlet of the oil pump is communicated with an overflow valve, and an oil outlet of the overflow valve is connected back to an oil tank.
3. The hydraulic PTFE tube extruder of claim 1, wherein the hydraulic oil line system further comprises a pressure maintaining oil line, an oil inlet of the pressure maintaining oil line is connected with an oil line between the first reversing valve and the oil pump, an oil outlet of the pressure maintaining oil line is returned to the oil tank, and the pressure maintaining oil line is connected in series with two ball valve switches and an accumulator located between the two ball valve switches.
4. The hydraulic PTFE tube pushing and extruding machine as recited in claim 1, wherein a one-way valve is further disposed on an oil path of the oil outlet of the oil pump, and the oil outlet of the oil pump is communicated with the oil inlet P of the first reversing valve through the one-way valve.
5. The hydraulic PTFE tube extruder of claim 1, wherein the first reversing valve is an O-type three-position, four-way reversing valve.
6. The hydraulic PTFE tube extruder of claim 1, wherein the second reversing valve is a Y-type three-position, four-way reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023069169.2U CN214027087U (en) | 2020-12-18 | 2020-12-18 | Hydraulic PTFE pipe pushing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023069169.2U CN214027087U (en) | 2020-12-18 | 2020-12-18 | Hydraulic PTFE pipe pushing machine |
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| Publication Number | Publication Date |
|---|---|
| CN214027087U true CN214027087U (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023069169.2U Active CN214027087U (en) | 2020-12-18 | 2020-12-18 | Hydraulic PTFE pipe pushing machine |
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|---|---|
| CN (1) | CN214027087U (en) |
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- 2020-12-18 CN CN202023069169.2U patent/CN214027087U/en active Active
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