CN205202145U - Oily electrical heating carry over pinch rolls in PET packing area - Google Patents

Abstract

The utility model discloses an oily electrical heating carry over pinch rolls in PET packing area, including center pin and heating roll body, its characterized in that, the whole drum structure that is of heating roll body, a section of thick bamboo wall be the airtight cavity of cavity, heating roll body suit on the center pin, packing conduction oil in the section of thick bamboo wall cavity of heating roll body to be provided with the heating pipe mounting hole of having placed the heating pipe in the section of thick bamboo wall cavity of heating roll body. Oily electrical heating carry over pinch rolls in PET packing area utilize heating pipe heating to seal the conduction oil in the roll body, the conduction oil need not the circulation, eliminates the oil leak situation, and is ensure the temperature steady of whole roll body and even, guarantees the tensile quality in packing area.

Description

A kind of oily electrical heating carry-over pinch rolls of PET strap

Technical field

The utility model relates to carry-over pinch rolls technical field, particularly relates to a kind of oily electrical heating carry-over pinch rolls of PET strap.

Background technology

PET strap is because of physics, the chemical property of its excellence, become steel band substitute in increasing occasion and be widely used, the operation of PET baling band shaping process most critical is stretching link, stretching link adopts stretching and traction roller (providing pulling motion) to process, due to the characteristic of PET material, stretching time required when PET strap stretches is longer than the stretching time of common plastics strap, in drawing process, there will be the temperature because of heat leakage reduce the situation affecting drawing effect, so PET strap needs at high temperature to carry out stable stretching.

At present, PET strap production equipment carry-over pinch rolls solution on the market mainly contains two kinds, and one adopts deep fat conduction heating, and another kind is then directly install Electrothermal ring heating carry-over pinch rolls at carry-over pinch rolls inwall.Adopting the mode of deep fat conduction heating, is utilize die heater centralized oil supply, and oil temperature temperature regulates and adopts die heater heating to cool co-controlling with cooling-water machine.When stretching, PET strap is attached to carry-over pinch rolls surface, PET strap absorbs the heat of carry-over pinch rolls, carry-over pinch rolls have heat leakage in atmosphere simultaneously, the oil temperature of carry-over pinch rolls inside is caused to reduce, want maintaining roller surface temperature constant, then the Low Temperature Thermal oil require in roller ceaselessly carries out exchange with the high-temperature hot oil in die heater and conducts heat.When draw-gear normally runs, carry-over pinch rolls need the rotation keeping about 200R/min, so need to use liquid rotating joint at die heater oil pipe and carry-over pinch rolls interface, there will be serious oil leakage phenomenon in actual use, whole system is difficult in maintenance, and the draw-gear of the required heating of PET strapping band product line has many groups, and often organizing draw-gear needs independently to use one group of die heater and cooling-water machine, this causes the equipment cost required for the program high, reduces the market competitiveness of equipment.

The mode of Electrothermal ring heating carry-over pinch rolls is directly installed at carry-over pinch rolls inwall, although avoid oil leakage phenomenon, produce and use cost low, safeguard simple, but because carry-over pinch rolls pipe thickness factor causes the temperature stability of carry-over pinch rolls poor, direct employing Electrothermal ring can cause the temperature fluctuation of Different periods carry-over pinch rolls large to carry-over pinch rolls heating, the temperature of same time carry-over pinch rolls different parts is also variant, thus have influence on the stretching quality of PET strap, cause product size to fluctuate large, be difficult to satisfied strict process requirements.

Utility model content

The technical assignment of technical problem to be solved in the utility model and proposition improves prior art, a kind of oily electrical heating carry-over pinch rolls of PET strap are provided, the traditional PET strap carry-over pinch rolls solved in current technology there will be stream oil or the very much not uniform situation of heating-up temperature fluctuation, affect PET strap stretching quality, the problem of repair and maintenance difficulty.

For solving above technical problem, the technical solution of the utility model is:

A kind of oily electrical heating carry-over pinch rolls of PET strap, comprise central shaft and heating roll body, it is characterized in that, described heating roll body entirety is in cylindrical structure, barrel is hollow airtight cavity, heating roll body is sleeved on central shaft, fills conduction oil, and be provided with the heating tube installing hole that placed heating tube in the barrel cavity heating roll body in the barrel cavity of heating roll body.Conduction oil is enclosed in heating roll body by the oily electrical heating carry-over pinch rolls of PET strap described in the utility model, conduction oil is without the need to circulation, thus eliminate the situation of leakage of oil, improve service life, reduce maintenance difficulties, in heating roll body, utilize heating tube to heat-conducting oil heating, conduction oil is full of whole heating roll body, thus guarantee that each spot temperature heating roll body is even, and this kind of all right effective control temperature of mode, the temperature of whole heating roll body is made to meet the demand of PET strap stretch process, ensure the stretching quality of PET strap, reduce product size fluctuation, meet strict process requirements, and warm-up mill body structure of the present utility model is simple, build and implement easily, equipment cost is low, the market competitiveness is strong.

Further, the inner ring size of described heating roll body is greater than central shaft external diameter, the inner ring of heating roll body is by supporting end plate connection on center shaft, this kind of structure is adopted effectively heating roll body and central shaft to be separated, the heat reducing heating roll body conducts to installation bearing through central shaft, avoid Bearing Temperature and operation irregularity are installed, the smoothness of rotation can not be ensured, extend bearings mounted service life.

Further, the axial end portion of described heating roll body is provided with installing seat for safety valves, and installing seat for safety valves inside becomes three-way pipe structure, one end is communicated with the barrel cavity of heating roll body, the other end adopts the shutoff of oilhole plug, and at the 3rd end device safety valve, safety valve adopts high temperature directly to fill overflow valve.Seal in the barrel cavity that the utility model utilizes the shutoff of oilhole plug to ensure heating roll body, prevents conduction oil from leaking, guarantees the temperature stabilization of whole heating roll body and even; Safety valve provides use safety guarantee for heating roll body simultaneously, when equipment operation failure, cause heating tube to work always, the heat-conductive-oil high-temperature then heated in roll body decomposes causes pressure in heating roll body to raise, when pressure exceedes safety valve setting pressure, safety valve is opened automatically, conduction oil and the decomposition gas of heating roll body inside are discharged by safety valve, reduce heating roll body internal pressure, avoid danger of blasting.

Further, the end of the barrel cavity of described heating roll body is also welded with the installation of TC seat for device thermocouple.Whether the temperature that the utility model utilizes thermocouple monitoring to heat the inner conduction oil of roll body works to control heating tube, when conduction oil temperature rises to the temperature of setting, thermocouple sends the working power of signal cut heating tube, the even heat of conduction oil is delivered to warm-up mill surface, carrying out heating to the PET strap being attached to roll surface makes strap temperature stabilization at a temperature spot, ensures normally carrying out of PET strap drawing process.When heat loss causes conduction oil temperature lower than design temperature, thermocouple detection sends signal enabling heating tube and heats conduction oil, repeatedly carries out according to above workflow.

Further, also there is shrouding the end of described heating roll body by bolt device, utilize shrouding by components hide such as thermocouple, installing seat for safety valves, safety valve, heating tubes inside shrouding, make the end of heating roll body keep formation state, the outer end aesthetic property of roll body is heated in raising.

Further, described central shaft is quill shaft, and inside is used as the passage in power line and holding wire, saves space, facilitates Signal transmissions and control.

Further, the end of described central shaft is by bolt device bus ring, External cable is connected by the cable of bus ring with central shaft inside, utilizes bus ring to ensure the External cable not transfer when roll body assembly rotates, and keeps stable Energy control to connect.

Further, described central shaft is by two installation shaft bearing apparatus in draw-gear frame, and install the circular seat bearing that bearing is band boss, center of serve axle is installed stable, guarantees rotation and the stable transmission of central shaft during duty.

Further, the end of described central shaft installs synchronous sprocket wheel and drive sprocket by flat key, guarantees that stable transmission is efficient.

Compared with prior art, the utility model advantage is:

The roll body assembly of the oily electrical heating carry-over pinch rolls of PET strap described in the utility model utilizes heating tube to heat, transmit heat to roll surface by the conduction oil in heating roll body to heat PET strap, conduction oil, without the need to circulation, effectively avoids the situation occurring leakage of oil;

Heating tube does not directly contact with roll body working face, adopts conduction oil to carry out heat transmission, temperature stabilization, fluctuates little, and avoid heating tube directly to heat to roll body the temperature fluctuation that causes large, product size fluctuation is large;

Without the need to a large amount of high temperature oil pipes and hydraulic valve, device structure is simple, build convenient, cost is low, working service is convenient, less demanding to operation and maintenance personnel;

Each roll body assembly can control temperature separately, and can monitor and adjust each roll temperature in real time, applicability is strong.

Accompanying drawing explanation

Fig. 1 is the structural representation of roll body assembly;

Fig. 2 is the end face structure schematic diagram of heating roll body.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

The oily electrical heating carry-over pinch rolls of a kind of PET strap disclosed in the utility model embodiment, conduction oil is enclosed in roll body, conduction oil is without the need to circulation, eliminate leakage of oil situation, in roll body, adopt electric heating tube to heat-conducting oil heating, thus guarantee whole roll body temperature stabilization and evenly, ensure strap stretching quality.

As depicted in figs. 1 and 2, a kind of oily electrical heating carry-over pinch rolls of PET strap, comprise central shaft 1 and heating roll body 2, heating roll body 2 entirety is in cylindrical structure, barrel is hollow airtight cavity, the outer surface of heating roll body 2 is machined to the rear chromium plating of surface roughness 0.8, heating roll body 2 is sleeved on central shaft 1, central shaft 1 passes through two installation bearing 13 devices in draw-gear frame, the circular seat bearing that bearing 13 is band boss is installed, central shaft 1 installs synchronous sprocket wheel 15 or drive sprocket 16 by flat key 14, only drive roll is arranged drive sprocket 16, drive roll adopt double strand chain transmission improve transmission stability, conduction oil is filled in the barrel cavity of heating roll body 2, and the heating tube installing hole 4 be also provided with in the barrel cavity heating roll body 2 for placing heating tube 3, heating tube installing hole 4 is as the overcoat of heating tube 3, for separating heating tube 3 and conduction oil, heating tube 3 is avoided to be corroded, improve the service life of heating tube 3.

The axial end portion of heating roll body 2 is provided with installing seat for safety valves 6, installing seat for safety valves 6 inside becomes three-way pipe structure, and one end is communicated with the barrel cavity of heating roll body 2, and the other end adopts the shutoff of oilhole plug 7, at the 3rd end device safety valve 8, safety valve 8 adopts high temperature directly to fill overflow valve.The end of the barrel cavity of heating roll body 2 is also welded with the installation of TC seat 10 for device thermocouple 9.Central shaft 1 is quill shaft, inside is used as the passage in power line and holding wire, cable is connected with heating tube 3, thermocouple 9 respectively, and the end of central shaft 1 is by bolt device bus ring 12, and External cable is connected with the cable of central shaft 1 inside by bus ring 12.Also there is shrouding 11 end of heating roll body 2 by bolt device, utilize shrouding by components hide such as thermocouple, installing seat for safety valves, safety valve, heating tubes inside shrouding, make the end of heating roll body keep formation state, improve the outer end aesthetic property of heating roll body.

The inner ring size of heating roll body 2 is greater than central shaft 1 external diameter, the inner ring of heating roll body 2 is by supporting that end plate 5 is connected on central shaft 1, utilize and support that heating roll body 2 and central shaft 1 are isolated by end plate 5, prevent heating roll body 2 from central shaft 1, heat trnasfer occurring, avoiding the heat heating roll body 2 to be delivered to installation bearing 13 place makes installation bearing 13 temperature too high and aero mode, increases the service life.

When equipment runs, heating tube heats roll body component internal conduction oil, sends signal cut heating power supply when conduction oil temperature rises to the temperature of setting by thermocouple.The even heat of conduction oil is delivered to warm-up mill surface, carries out heating make strap temperature stabilization at a temperature spot to the PET strap being attached to roll surface, ensures normally carrying out of PET strap drawing process.When heat loss causes conduction oil temperature to heat conduction oil lower than sending signal enabling heating tube by thermocouple detection during design temperature, so repeatedly.If equipment operation failure, cause heating tube to work always, then in roll body, heat-conductive-oil high-temperature decomposes safety valve when causing that in heating roll body, pressure increases to over safety valve setting pressure and opens, conduction oil and the decomposition gas of roll body inside are discharged by safety valve, reduce heating roll body internal pressure, avoid causing danger.

Interpolation and the replacing of conduction oil are undertaken by the drain oil on installing seat for safety valves, have changed rear placement oilhole plug and have sealed.

Below be only preferred embodiment of the present utility model, it should be pointed out that above-mentioned preferred embodiment should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim limited range.For those skilled in the art, not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (9)

1. the oily electrical heating carry-over pinch rolls of a PET strap, comprise central shaft (1) and heating roll body (2), it is characterized in that, described heating roll body (2) entirety is in cylindrical structure, and barrel is hollow airtight cavity, heating roll body (2) is sleeved on central shaft (1), fill conduction oil in the barrel cavity of heating roll body (2), and be provided with the heating tube installing hole (4) that placed heating tube (3) in the barrel cavity heating roll body (2).

2. the oily electrical heating carry-over pinch rolls of PET strap according to claim 1, it is characterized in that, the inner ring size of described heating roll body (2) is greater than central shaft (1) external diameter, and the inner ring of heating roll body (2) is by supporting that end plate (5) is connected on central shaft (1).

3. the oily electrical heating carry-over pinch rolls of PET strap according to claim 1, it is characterized in that, the axial end portion of described heating roll body (2) is provided with installing seat for safety valves (6), installing seat for safety valves (6) inside becomes three-way pipe structure, one end is communicated with the barrel cavity of heating roll body (2), the other end adopts oilhole plug (7) shutoff, at the 3rd end device safety valve (8), safety valve (8) adopts high temperature directly to fill overflow valve.

4. the oily electrical heating carry-over pinch rolls of PET strap according to claim 3, it is characterized in that, the end of the barrel cavity of described heating roll body (2) is also welded with the installation of TC seat (10) for device thermocouple (9).

5. the oily electrical heating carry-over pinch rolls of PET strap according to claim 4, is characterized in that, also there is shrouding (11) end of described heating roll body (2) by bolt device.

6. the oily electrical heating carry-over pinch rolls of PET strap according to claim 4, is characterized in that, described central shaft (1) is quill shaft, and inside is used as the passage in power line and holding wire.

7. the oily electrical heating carry-over pinch rolls of PET strap according to claim 6, it is characterized in that, the end of described central shaft (1) is by bolt device bus ring (12), and External cable is connected by the cable that bus ring (12) is inner with central shaft (1).

8. the oily electrical heating carry-over pinch rolls of PET strap according to claim 1, it is characterized in that, described central shaft (1) in draw-gear frame, installs the circular seat bearing that bearing (13) is band boss by two installation bearing (13) devices.

9. the oily electrical heating carry-over pinch rolls of PET strap according to claim 1, it is characterized in that, the end of described central shaft (1) installs synchronous sprocket wheel (15) or drive sprocket (16) by flat key (14).