CN110076985B

CN110076985B - External thread hot extrusion forming machine for fire extinguisher siphon

Info

Publication number: CN110076985B
Application number: CN201910466286.5A
Authority: CN
Inventors: 于鹏青
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-09-17
Anticipated expiration: 2039-05-31
Also published as: CN110076985A

Abstract

The invention relates to an external thread hot extrusion forming machine for a fire extinguisher siphon, which comprises a frame and is characterized in that: the device comprises a thread forming assembly, a preheating assembly and a conveying assembly, wherein the thread forming assembly is arranged on a rack and used for extruding a plastic pipe interface, the preheating assembly is used for heating the plastic pipe interface, and the conveying assembly is used for carding the plastic pipes and sequentially conveying the plastic pipes into the preheating assembly to be heated and the thread forming assembly to be subjected to thread forming; the invention has the beneficial effects that: the production efficiency is fast, except that pay-off and packing, all the other processing steps are accomplished automatically by this equipment.

Description

External thread hot extrusion forming machine for fire extinguisher siphon

Technical Field

The invention relates to the technical field of plastic pipe connector thread forming equipment, in particular to an external thread hot extrusion forming machine for a fire extinguisher siphon pipe.

Background

The plastic pipe is produced by using synthetic resin, i.e. polyester, as raw material, adding stabilizer, lubricant, plasticizer, etc. and through extrusion in a pipe making machine. The pipe is mainly used as a running water supply system pipe, a drainage, exhaust and pollution discharge sanitary pipe, an underground drainage pipe system, a rainwater pipe, a threading pipe for electric wire installation and assembly sleeve, and the like of a house building; the applications of plastic pipes are extremely wide, for example: it can be used inside a fire extinguisher to act as a medium for the delivery of extinguishing substances (for example: dry powders), which inside the fire extinguisher can also be called: a fire extinguisher siphon tube;

at present, the production mode of the siphon tube of the fire extinguisher mainly comprises the steps of cutting (namely cutting a longer plastic tube into a plurality of sections of blanks of the inner tube of the fire extinguisher), breaking and extrusion forming of threads at the end (which can be called as a joint), wherein in the step of extrusion forming, most of the existing methods adopt a thread forming machine, for example: the applicant discloses an invention patent named as a plastic pipe joint external thread forming process and equipment in patent number CN101195272A applied on 8/1/2008, but the patent has a common fault that: after each plastic pipe joint is extruded and formed, the plastic pipe joints are manually taken out and then manually and accurately fed (namely, the plastic pipes are accurately inserted into an extrusion cavity of forming equipment), so that the process is complicated, and the production efficiency is very low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an external thread hot extrusion forming machine for a siphon pipe of a fire extinguisher, and aims to solve the problems in the background technology.

The technical scheme of the invention is realized as follows: the utility model provides an external screw thread hot extrusion molding machine for fire extinguisher siphon, includes the frame, its characterized in that: the device comprises a thread forming assembly, a preheating assembly and a conveying assembly, wherein the thread forming assembly is arranged on a rack and used for extruding a plastic pipe interface, the preheating assembly is used for heating the plastic pipe interface, and the conveying assembly is used for carding the plastic pipes and sequentially conveying the plastic pipes into the preheating assembly for heating and the thread forming assembly for thread forming.

Preferably: the conveying assembly comprises at least two groups of transmission chain wheels rotationally connected to the rack, transmission chains laid on the transmission chain wheels and meshed with the transmission chain wheels, and driving modules for driving the transmission chain wheels to rotate at equal intervals; wherein, a plurality of positioning plates for fixing the plastic pipes are fixedly connected between the transmission chains at equal intervals in the moving direction of the transmission chains.

Preferably: the driving module comprises a driving block driven by a motor and a driving rod which drives the driving block to pull the transmission chain to move; one end of the driving block is fixedly connected with the output end of the motor, and at least one articulated shaft capable of revolving around the output end of the motor is fixedly connected to the driving block; the actuating lever include with articulated shaft rotates the pull rod of being connected, the one end fixedly connected with that the articulated shaft is kept away from to the pull rod is used for pulling the colluding type piece that the drive chain removed.

Preferably: the device also comprises a limiting device used for limiting the movement of the transmission chain at intervals; the limiting device comprises a limiting block which is driven by an air cylinder and clamped into the transmission chain at intervals.

Preferably: the thread forming assembly comprises a thread forming die and an extrusion forming assembly, wherein the thread forming die is arranged on the rack, is positioned on one side of the conveying assembly and is used for accommodating a plastic pipe joint, and the extrusion forming assembly is driven by the driving device and can axially reciprocate along a forming die channel; wherein, a forming external thread is arranged in the forming die channel.

Preferably: the extrusion shaping assembly comprises a shaft sleeve positioned in the forming die channel, an extrusion outer shaft penetrating into the forming die channel from the shaft sleeve and being capable of being inserted into the plastic pipe connector, and an extrusion inner shaft arranged at the extrusion end of the extrusion outer shaft, wherein the shaft diameter of the extrusion inner shaft is gradually enlarged from one end far away from the extrusion outer shaft to one end close to the extrusion outer shaft.

Preferably: the driving device comprises a cam shaft driven by a motor, a driving shaft driven by the cam shaft to push and extrude the outer shaft, and a return spring arranged between the driving shaft and the shaft sleeve and used for returning the driving shaft.

Preferably: the preheating assembly comprises a preheating plate arranged on one side of the conveying assembly, a preheating groove arranged on the preheating plate and used for allowing the plastic pipe connector to move and guiding the plastic pipe connector into the extrusion groove, and a gas supply assembly used for supplying heat to the preheating groove.

Preferably: the air supply assembly comprises a fan, a hot air pipe and a heater, wherein the hot air pipe is respectively communicated with the output end of the fan and the preheating groove, and the heater is used for heating air in the hot air pipe.

Preferably: a layer of heat transfer plate for transferring the heat in the hot air pipe to the joint of the plastic pipe is arranged in the bottom of the preheating groove.

By adopting the technical scheme: at the beginning of the material loading, only need to place the plastic tubing on conveyor components through the manual work, through conveyor components's transport one by one, can heat the plastic tubing in proper order (in preheating the subassembly) and extrusion (in screw thread forming subassembly) to need not the accurate material loading of relapse and taking time, and then improve the shaping efficiency to plastic tubing interface external screw thread.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the portion B of FIG. 1;

FIG. 4 is a sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of the portion C of FIG. 5;

FIG. 7 is a schematic sectional view of a preheating plate in embodiment 1 of the present invention;

FIG. 8 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 9 is a schematic structural diagram of embodiment 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 7, the invention discloses an external thread hot extrusion molding machine for a siphon tube of a fire extinguisher, which comprises a frame 1, and in the specific embodiment of the invention, the external thread hot extrusion molding machine comprises a thread molding component 2 which is arranged on the frame 1 and is used for extruding a plastic tube connector, a preheating component 3 for heating the plastic tube connector, and a conveying component 4 which is used for carding the plastic tubes and sequentially conveying the plastic tubes in groups to the preheating component 3 for heating and the thread molding component 2 for thread molding.

In the embodiment of the present invention, the delivery assembly 4 can deliver two plastic tubes at a time into the thread forming assembly 2.

In the embodiment of the present invention, the conveying assembly 4 includes at least two sets of driving sprockets 40 rotatably connected to the frame 1, a driving chain 41 laid on and meshed with each set of driving sprockets 40, and a driving module 42 for driving the driving sprockets 40 to rotate at equal intervals; wherein, a plurality of positioning plates 43 for fixing each plastic tube are fixedly connected between the transmission chains 41 at equal intervals in the moving direction of the transmission chains 41.

In the embodiment of the present invention, the positioning plate 43 may be fixed to each of the driving chains 41 by bolts.

In the embodiment of the present invention, the driving module 42 includes a driving block 420 driven by a motor and a driving rod 421 driven by the driving block 420 to pull the driving chain 41 to move; the cross section of the driving block 420 is fan-shaped and is fixedly connected with the side wall of the motor output end 423, and at least one hinge shaft 422 is fixedly connected to the fan-shaped surface of the driving block 420 at a position far away from the motor output end 423; the driving rod 421 includes a pull rod 4210 rotatably connected to the hinge shaft 422, and one end of the pull rod 4210 away from the hinge shaft 422 is fixedly connected to a hook-shaped block 4211 for pulling the transmission chain 41 to move.

In the embodiment of the present invention, the thread forming assembly 2 includes a lower thread forming mold 20 mounted on the frame 1 and located at one side of the conveying assembly 4 for accommodating the plastic pipe joint, an upper thread forming mold 22 disposed above the lower thread forming mold 20 and driven by a cylinder 21 to contact the lower thread forming mold 20, and an extrusion molding assembly 24 disposed in the lower thread forming mold 20 and driven by a driving device 23 and partially entering the interior of the plastic pipe joint; wherein, the thread forming lower die 20 and the thread forming upper die 22 both comprise a die plate 200 having at least one extrusion groove 2a, and each extrusion groove 2a is provided therein with a forming external thread 2 b.

In the present embodiment, the thread forming lower mold 20 and the thread forming upper mold 22 constitute a thread forming mold.

In the embodiment of the present invention, the extrusion grooves 2a correspondingly disposed on the lower thread forming die 20 and the upper thread forming die 22 constitute the forming die passage.

In the embodiment of the present invention, the extrusion setting assembly 24 includes a sleeve 240 located in any extrusion groove 2a, an extrusion outer shaft 241 which penetrates from the sleeve 240 into the extrusion groove 2a and can penetrate into the plastic pipe connector, and an extrusion inner shaft 242 provided at the extrusion end of the extrusion outer shaft 241, wherein the axial diameter of the extrusion inner shaft 242 gradually enlarges from one end far away from the extrusion outer shaft 241 to one end near the extrusion outer shaft 241.

In the embodiment of the present invention, the driving device 23 includes a cam shaft 231 driven by the motor 230, a driving shaft 232 driven by the cam shaft 231 to push the pressing outer shaft 241, and a return spring 233 provided between the driving shaft 232 and the bushing 240 for returning the driving shaft 232.

In the embodiment of the present invention, the preheating assembly 3 includes a preheating plate 30 disposed at one side of the conveying assembly 4, a preheating tank 300 disposed on the preheating plate 30 for allowing the plastic pipe to be jointed and guided into the extrusion tank 2a, and a gas supply assembly 32 for supplying heat into the preheating tank 300.

In the embodiment of the present invention, the gas supply assembly 32 includes a fan 321, a hot air duct 322 respectively communicating the output end of the fan 321 and the preheating groove 300, and a heater 33 for heating the gas inside the hot air duct 322.

In an embodiment of the present invention, a storage box 1b for storing the plastic tube 1a may be disposed above the positioning plate 43.

In an embodiment of the present invention, one side of the storage box 1b may be fixedly connected with a positioning plate 1c disposed in a gap with the positioning plate 43.

In the embodiment of the present invention, the number of the extrusion grooves 2a of each of the thread forming lower die 20 and the thread forming upper die 22 is the same as the number of the plastic tubes of each group.

By adopting the technical scheme: at the beginning of feeding, a plastic pipe (such as phi 16 x 1.5 type) is placed on the conveying assembly only by manpower, and the plastic pipe can be sequentially heated (in the preheating assembly) and extruded and formed (in the thread forming assembly) by one-to-one conveying of the conveying assembly, so that repeated accurate feeding and time-consuming material taking are not needed, and the forming efficiency of the external thread of the plastic pipe connector is improved;

in more detail:

1. working principle of the conveying assembly (as shown in fig. 1-3):

firstly, placing a plastic pipe between adjacent positioning plates or on a material storage box, and pulling a transmission chain to move through a driving module to drive the positioning plates on the transmission chain to move so as to drive the plastic pipe between the positioning plates to move; the working principle of the driving module is as follows: the motor drives the drive block and rotates, because the shape of drive block is established to "fan-shaped", and when the drive block rotated round motor output shaft, can drive the articulated shaft revolution of fixed connection on the drive block round motor output shaft, because it is connected with the pull rod to rotate on the articulated shaft, consequently, the one end that can drive the pull rod is "circumference" swing, finally, can drive colluding type piece card on the pull rod free end and go into in drive chain's the chain ring, and pulling drive chain removes, and then drive the plastic tubing through the locating plate and remove, it can roughly divide into two kinds of states: first, the pulled state, namely: the hook-shaped part is arranged in the chain ring and pulls the transmission chain to move; second, preparation state: namely: the driving block drives the pull rod to enable the hook-shaped part to enter the section in the next chain ring;

2. function of preheat assembly (see fig. 3 and 7):

when the locating plate drives the plastic tubing and removes, it heats in getting into preheating the subassembly at first, promptly: one end of the plastic pipe moves in a preheating groove of the preheating plate, while moving, the fan sucks external air into the hot air pipe and heats the air in the hot air pipe through the heater to form hot air (or hot air), and when the hot air enters the preheating groove, the hot air is contacted with the interface of the plastic pipe, so that the interface of the plastic pipe is slightly softened, and the subsequent thread forming is facilitated;

3. working principle of the thread forming assembly (as shown in fig. 3-6):

the plastic pipe heated by the preheating component enters an extrusion groove of a lower thread forming die (at the moment, the lower thread forming die and the upper thread forming die are arranged at intervals) through the guidance of the preheating groove, when the plastic pipe completely enters the extrusion groove, the driving module is in a 'preparation state', the transmission chain stops moving at the moment, the plastic pipe also stops moving, at the moment, the air cylinder (controlled by a PLC) drives the upper thread forming die to be in contact with the lower thread forming die and clamp the plastic pipe, the motor (controlled by the PLC) drives the cam shaft to rotate, and drives the inner extrusion shaft to slowly enter one end of the plastic pipe through the driving shaft and the outer extrusion shaft, and due to the change of the shaft diameter of the inner extrusion shaft, when the inner extrusion shaft enters the plastic pipe, one end of the plastic pipe is expanded and is in contact with the forming external threads in the extrusion groove and generates a mutual acting force, thereby forming an external thread at the end of the plastic tube; it should be noted that: the thickness of the cam on the cam shaft is changed, so that the driving shaft can be pushed intermittently when the cam on the cam shaft rotates, and when the cam on the cam shaft does not push the driving shaft, the reset spring can reset the driving shaft, so that one end of the driving shaft is always contacted with the side surface of the cam, and the normal operation of the extrusion molding assembly is ensured;

after the external threads of the plastic pipes are formed, the driving module is in a pulling state, so that the next group of plastic pipes are sent into the thread forming assembly for thread forming;

it should be noted that: in order to prevent the plastic pipe from being transferred from the preheating assembly to the thread forming assembly to be separated from the conveying assembly, a positioning main board is arranged in a gap above the positioning plate, so that the plastic pipe can be effectively prevented from being separated;

according to statistics, 1800 siphons can be processed by one piece of equipment of the hot extrusion forming machine per hour, and 3 pieces of equipment can be simultaneously controlled by one person; because the invention has the axial extrusion thickening function to the heating part of the plastic pipe thread forming before the extrusion forming, when in processing, the traditional method can be replaced by a thinner pipe, such as: taking the prior pipe with the diameter of 16 x 1.5 as an example, the equipment can be processed into the pipe with the thickness of 1.5mm through utilizing the pipe with the thickness of 1.2mm, so that a large amount of raw materials can be saved.

Example 2 is different from example 1 in that

As shown in fig. 8, in the embodiment of the present invention, a limiting device 5 is further included for limiting the movement of the transmission chain 41 at intervals; the limiting device 5 comprises a limiting block 51 which is driven by an air cylinder 50 and is clamped into the transmission chain 40 (namely, a chain ring) at intervals.

By adopting the technical scheme: when the plastic pipe is being shaped (namely, one end of the plastic pipe is arranged in the thread forming assembly), in order to prevent the transmission chain from moving (for example, due to equipment failure), the plastic pipe can be clamped into the chain ring of the transmission chain through the limiting block, so that the limiting effect on the transmission chain can be achieved, and the production efficiency is ensured.

Example 3 is different from the above-mentioned examples in that

Referring to fig. 9, in the embodiment of the present invention, a heat transfer plate 6 for transferring heat from the interior of the hot air pipe 322 to the plastic pipe joint is disposed in the bottom of the preheating tank 300.

In a particular embodiment of the invention, the thickness of the heat transfer plates 6 may become gradually thicker from the transport direction of the transport assembly.

In an embodiment of the present invention, the heat transfer plate 6 may be provided with a hot air discharge passage 60 penetrating the heat transfer plate 6 from the direction of the conveying assembly and communicating with the hot air pipe 322.

By adopting the technical scheme: the heat transfer plate can ensure that the joint of the plastic pipe is softened due to heating, and can also avoid the influence on the forming effect of the external thread caused by the fact that the subsequent plastic pipe is not installed in place due to the fact that the plastic pipe is blown by hot air; the change of the thickness of the heat transfer plate can arrange the forming end of the plastic pipe, and the forming effect of the external thread of the plastic pipe joint is further ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an external screw thread hot extrusion molding machine for fire extinguisher siphon, includes the frame, its characterized in that: the device comprises a thread forming assembly, a preheating assembly and a conveying assembly, wherein the thread forming assembly is arranged on a rack and used for extruding a plastic pipe interface, the preheating assembly is used for heating the plastic pipe interface, and the conveying assembly is used for carding the plastic pipes and sequentially conveying the plastic pipes into the preheating assembly to be heated and the thread forming assembly to be subjected to thread forming;

the conveying assembly comprises at least two groups of transmission chain wheels rotationally connected to the rack, transmission chains laid on the transmission chain wheels and meshed with the transmission chain wheels, and driving modules for driving the transmission chain wheels to rotate at equal intervals; wherein, a plurality of positioning plates for fixing each plastic pipe are fixedly connected between the transmission chains at equal intervals in the moving direction of the transmission chains;

the driving module comprises a driving block driven by a motor and a driving rod which drives the driving block to pull the transmission chain to move; one end of the driving block is fixedly connected with the output end of the motor, and at least one articulated shaft capable of revolving around the output end of the motor is fixedly connected to the driving block; the driving rod comprises a pull rod which is rotationally connected with the hinged shaft, and one end of the pull rod, which is far away from the hinged shaft, is fixedly connected with a hook-shaped block which is used for pulling the transmission chain to move;

the device also comprises a limiting device used for limiting the movement of the transmission chain at intervals; the limiting device comprises a limiting block which is driven by an air cylinder and clamped into the transmission chain at intervals;

the preheating assembly comprises a preheating plate arranged on one side of the conveying assembly, a preheating groove arranged on the preheating plate and used for moving a plastic pipe connector and guiding the plastic pipe connector into the extrusion groove, and a gas supply assembly used for supplying heat to the preheating groove;

the air supply assembly comprises a fan, a hot air pipe and a heater, wherein the hot air pipe is respectively communicated with the output end of the fan and the preheating groove, and the heater is used for heating air in the hot air pipe;

a layer of heat transfer plate for transferring the heat in the hot air pipe to the joint of the plastic pipe is arranged in the bottom of the preheating groove.

2. The external thread hot extrusion forming machine for the siphon of the fire extinguisher as claimed in claim 1, wherein: the thread forming assembly comprises a thread forming die and an extrusion forming assembly, wherein the thread forming die is arranged on the rack, is positioned on one side of the conveying assembly and is used for accommodating a plastic pipe joint, and the extrusion forming assembly is driven by the driving device and can axially reciprocate along a forming die channel; wherein, a forming external thread is arranged in the forming die channel.

3. The external thread hot extrusion forming machine for the siphon of the fire extinguisher as claimed in claim 2, wherein: the extrusion shaping assembly comprises a shaft sleeve positioned in the forming die channel, an extrusion outer shaft penetrating into the forming die channel from the shaft sleeve and being capable of being inserted into the plastic pipe connector, and an extrusion inner shaft arranged at the extrusion end of the extrusion outer shaft, wherein the shaft diameter of the extrusion inner shaft is gradually enlarged from one end far away from the extrusion outer shaft to one end close to the extrusion outer shaft.

4. The external thread hot extrusion forming machine for the siphon of the fire extinguisher as claimed in claim 3, wherein: the driving device comprises a cam shaft driven by a motor, a driving shaft driven by the cam shaft to push and extrude the outer shaft, and a return spring arranged between the driving shaft and the shaft sleeve and used for returning the driving shaft.