CN214645759U - Anti-backflow vacuum exhaust chamber - Google Patents

Abstract

The utility model relates to a field of evacuation equipment discloses a backflow prevention vacuum exhaust chamber, it is including the fixed exhaust chamber body that sets up on the discharging pipe, with the blast pipe of exhaust chamber body intercommunication and locate the heating element on the exhaust chamber body, exhaust chamber body and discharging pipe intercommunication, heating element establishes and fixed connection annular heating pipe and the electric heat piece of fixed connection on annular heating pipe lateral wall on the exhaust chamber body lateral wall including the cover, annular heating pipe is used for holding heat-conducting liquid. The heating assembly can heat the exhaust chamber body, reduces the possibility that volatile components in the gas flow back to the material after meeting condensation, and improves the quality of the material.

Description

Anti-backflow vacuum exhaust chamber

Technical Field

The application relates to the field of vacuum pumping equipment, in particular to an anti-backflow vacuum exhaust chamber.

Background

Screw extruders are one type of plastic processing equipment and are also commonly used for processing rubber. The screw extruder processes the materials by means of pressure and shearing force generated by screw rotation during working, can fully mix the materials, and has wide application in industrial production.

In the related art, referring to fig. 1, a screw extruder includes a base 13, a discharge pipe 14, an extrusion screw 15, a motor 16, and a guide pipe 17, wherein the discharge pipe 14 and the motor 16 are both fixedly connected to the base 13, a feed hopper 18 is fixedly connected to the discharge pipe 14, and the feed hopper 18 is communicated with the discharge pipe 14. The extrusion screw 15 is arranged in the discharge pipe 14, and the extrusion screw 15 is coaxially connected with the output end of the motor 16; one end of the guide pipe 17 is communicated with the discharge pipe 14, and the other end is used for connecting air extraction equipment. When the material discharging device works, materials enter the material discharging pipe 14 through the material inlet, the motor 16 drives the extruding screw rod 15 to rotate, the extruding screw rod 15 pushes the materials to move along the material discharging pipe 14, and when the materials pass through the port of the guide pipe 17, the air suction equipment sucks away gas carried in the materials through the guide pipe 17.

In view of the above-mentioned related art, the inventor believes that, because the temperature of the exhaust pipe is lower than that of the discharge pipe, when gas enters the exhaust pipe, volatile components carried in the gas are easy to condense at the pipe wall of the exhaust pipe, and the condensed volatile components flow back into the discharge pipe, which affects the quality of the material.

SUMMERY OF THE UTILITY MODEL

Among the correlation technique, volatile component will flow back in the discharge tube after condensing in the blast pipe, causes the influence to the material quality, in order to improve this defect, this application provides a backflow-preventing vacuum exhaust chamber.

The application provides a pair of backflow-preventing vacuum exhaust chamber adopts following technical scheme to obtain:

the utility model provides an anti-return vacuum exhaust chamber, includes the exhaust chamber body of fixed setting on the discharging pipe, with the blast pipe of exhaust chamber body intercommunication and locate the heating element on the exhaust chamber body, exhaust chamber body and discharging pipe intercommunication, heating element establishes and fixed connection annular heating pipe and the electric heat piece of fixed connection on annular heating pipe lateral wall on the exhaust chamber body lateral wall including the cover, annular heating pipe is used for holding heat-conducting liquid.

Through the technical scheme, during work, the air exhaust equipment of an operator is communicated with the exhaust pipe, the exhaust pipe extracts air in the exhaust chamber body, so that the air pressure in the exhaust chamber body is reduced, and gas carried in the material enters the exhaust chamber body under the action of air pressure difference and leaves the exhaust chamber body through the exhaust pipe. When gas passes through the exhaust chamber body, the electric heating block heats the exhaust chamber body through heat conducting liquid in the annular heating pipe, so that the temperature of the exhaust chamber body is increased, and therefore volatile components in the gas are not easy to condense when contacting the inner wall of the exhaust chamber body, the possibility of backflow of the volatile components into materials is reduced, and the quality of the materials is improved.

Preferably: the annular heating pipe is provided with a pressure regulating port, the pressure regulating port is provided with a pressure regulating assembly, the pressure regulating assembly comprises a sleeve communicated with the pressure regulating port and an elastic diaphragm arranged on the sleeve and far away from one end of the annular heating pipe, the elastic diaphragm is fixedly connected with the sleeve and used for sealing the end opening of the sleeve.

Through the technical scheme, when the pressure in the annular heating pipe changes, the pressure difference between the inside and the outside of the annular heating pipe is increased. At the moment, the elastic membrane deforms under the action of pressure difference between the inner side and the outer side, so that the pressure in the annular heating pipe is adjusted, the pressure difference between the inner side and the outer side of the annular heating pipe is reduced, the possibility of breakage of the annular heating pipe due to overlarge pressure difference is reduced, and the safety degree of operation is improved.

Preferably: the pressure regulating subassembly still includes the collar that sets up along the edge of pressure regulating mouth, collar and annular heating pipe fixed connection, all be equipped with the screw thread on telescopic lateral wall and on the inside wall of collar, the collar is worn to establish into by the sleeve, and with collar threaded connection.

Through above-mentioned technical scheme, when needs change elastic diaphragm, the operator rotates the sleeve, until the threaded connection between release sleeve and the collar, then with another sleeve threaded connection on the collar, can realize the change to elastic diaphragm.

Preferably: the annular heating pipe is externally provided with a housing which is connected with the annular heating pipe through a connecting piece, and the housing covers the electric heating block.

Through the technical scheme, when the electric heating device works, the electric heating block is isolated from the outside by the housing, the possibility of heat dissipation of the electric heating block is reduced, and the heat utilization efficiency is improved. In addition, the cover shell also reduces the possibility that an operator mistakenly touches the electric heating block, and reduces the probability of electric shock accidents.

Preferably: the connecting piece includes that fixed connection establishes the torsion spring on the connecting rod at connecting rod and cover on the housing, the connecting rod rotates with the lateral wall of annular heating pipe to be connected, torsion spring's one end and annular heating pipe fixed connection, the other end with housing fixed connection, the housing is contradicted with annular heating pipe.

Through above-mentioned technical scheme, when the electric heat piece was overhauld to needs, the operator rotated the housing and can be operated the electric heat piece, controlled the maintenance and ended, torsion spring's elasticity resumes to drive the housing and reset, support the housing tightly on annular heating pipe up to. An operator does not need to detach the housing in the maintenance process, and the housing can automatically reset, so that the convenience of operation is improved.

Preferably: this internal baffle that is equipped with along the axial of air discharge chamber, the baffle divides the air discharge chamber body inside into a plurality of cavities, the blast pipe is equipped with a plurality ofly, one blast pipe and a cavity intercommunication, be equipped with conversion subassembly between air discharge chamber body and the discharging pipe, conversion subassembly includes that fixed connection is at the conversion pipe on the blast pipe outer wall and rotates the conversion board of connecting near cavity one end at the conversion pipe, conversion pipe and discharging pipe intercommunication, set up the conversion hole with the conversion pipe intercommunication on the conversion board, the cavity has seted up the connecting hole on being close to the chamber wall of conversion board one side, one of conversion hole and connecting hole communicates.

Through the technical scheme, when the conversion hole is not communicated with the connecting hole, the air pressure in the cavity is gradually reduced due to the extraction of the air extraction equipment until the cavity is in a vacuum state. When the connecting hole is communicated with the vacuum cavity, gas carried in the material enters the cavity through the conversion pipe, the conversion hole and the connecting hole in sequence and then leaves the cavity through the exhaust pipe. Along with the rotation of conversion board, a plurality of cavities become vacuum state in proper order to take out the gas that carries in the material in proper order. During extraction, the cavity is in a vacuum state, so that the air pressure difference between the inside of the exhaust chamber body and the discharge pipe is increased, and the extraction efficiency is improved.

Preferably: the discharging pipe is provided with a driving assembly, the driving assembly comprises an air cylinder fixedly connected to the discharging pipe and a rack fixedly connected with the output end of the air cylinder, the conversion plate is provided with a latch along the periphery, and the latch is meshed with the rack.

Through the technical scheme, during operation, the cylinder drives the rack to move, and the rack drives the conversion plate to rotate through the clamping teeth, so that automatic control over the conversion plate is realized, and convenience in operation is improved.

Preferably: the inner side wall of the cavity is fixedly connected with an arc-shaped stop block, and an arc-shaped groove is formed in the arc-shaped stop block.

Through the technical scheme, when the operation time of the electric heating block is short, the temperature of the exhaust chamber body is not enough to maintain the volatile components in the gas in a gaseous state. At the moment, the volatile components are collected on the wall of the cavity and flow back from top to bottom until entering the arc-shaped groove. Thereafter, the arc-shaped groove continuously collects the volatile components which flow back. After the temperature of the exhaust chamber body rises, the volatile components in the reflux groove are heated and converted into gaseous state, so that the possibility of the volatile components flowing back into the discharge pipe is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the gas heating device works, gas carried in materials enters the exhaust chamber body from the discharge pipe, and the electric heating block heats the exhaust chamber body, so that the temperature of the exhaust chamber body is increased, the possibility that volatile components in the gas flow back into the materials after being condensed is reduced, and the quality of the materials is improved;

2. when the pressure difference between the inside and the outside of the annular heating pipe is increased, the elastic membrane deforms, so that the pressure difference between the inside and the outside of the annular heating pipe is reduced, the pressure difference is adjusted, the possibility that the annular heating pipe is broken due to overlarge pressure difference is reduced, and the operation safety is improved.

Drawings

FIG. 1 is a schematic view showing the overall structure of a screw extruder in the related art.

Fig. 2 is a schematic view of the overall structure of the backflow prevention vacuum exhaust chamber according to the embodiment of the present application.

Fig. 3 is a schematic diagram for showing the internal structure of the exhaust chamber body according to the embodiment of the present application.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Reference numerals: 1. an exhaust chamber body; 2. an exhaust pipe; 3. a heating assembly; 31. an annular heating pipe; 32. an electric heating block; 4. a voltage regulating component; 41. a sleeve; 42. a mounting ring; 43. an elastic diaphragm; 44. a pressure regulating port; 5. a conversion component; 51. a transfer tube; 52. a conversion plate; 53. a transfer aperture; 54. connecting holes; 6. a drive assembly; 61. a cylinder; 62. a rack; 63. clamping teeth; 7. a housing; 8. a connecting member; 81. a connecting rod; 82. a torsion spring; 9. a partition plate; 10. a cavity; 11. an arc-shaped block; 12. an arc-shaped slot; 13. a base; 14. a discharge pipe; 15. extruding a screw; 16. a motor; 17. a conduit; 18. a feed hopper.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses anti-backflow vacuum exhaust chamber. Referring to fig. 2 and 3, the backflow preventing vacuum exhaust chamber includes an exhaust chamber body 1, an exhaust pipe 2, and a heating assembly 3. The exhaust chamber body 1 is arranged above the discharge pipe 14 and communicated with the discharge pipe 14, and the exhaust chamber body 1 is fixedly connected with the discharge pipe 14 through support legs; the exhaust pipes 2 are arranged two, the two exhaust pipes 2 are communicated with the top end of the exhaust chamber body 1, and the heating assembly 3 is arranged on the exhaust chamber body 1. When the exhaust device works, an operator communicates the exhaust device with the two exhaust pipes 2, when materials pass through the discharge pipe 14, gas carried in the materials is sucked into the exhaust chamber body 1 and leaves the exhaust chamber body 1 through the exhaust pipes 2. When gas passes through exhaust chamber body 1, heating element 3 heats exhaust chamber body 1, has reduced the volatile component in the gas and has met the possibility that the cold condenses to make during the difficult backward flow material of volatile component, improved the quality of material.

Referring to fig. 3 and 4, the heating assembly 3 includes three annular heating pipes 31 and three electric heating blocks 32, and the three annular heating pipes 31 are axially spaced along the exhaust chamber body 1. Annular heating pipe 31 cover is established and fixed connection is on the lateral wall of exhaust chamber body 1, and the inside wall of annular heating pipe 31 and the laminating of the lateral wall of exhaust chamber body 1, and electric heat piece 32 fixed connection deviates from one side of exhaust chamber body 1 at annular heating pipe 31, and annular heating pipe 31 intussuseption is filled with heat-conducting liquid.

Referring to fig. 4, a cover 7 is arranged on the outer side wall of the annular heating pipe 31, and the electric heating block 32 is covered by the cover 7; the housing 7 is connected with the annular heating pipe 31 through the connecting piece 8, the connecting piece 8 comprises a connecting rod 81 and a torsion spring 82, the connecting rod 81 is rotatably connected with the annular heating pipe 31, the housing 7 is fixedly connected with the annular heating pipe 31, the torsion spring 82 is sleeved on the connecting rod 81, one end of the torsion spring 82 is fixedly connected with the annular heating pipe 31, and the other end of the torsion spring is fixedly connected with the housing 7.

Referring to fig. 3 and 4, in operation, the electric heating block 32 heats the heat-conducting liquid in the annular heating pipe 31 through the annular heating pipe 31, and the heat-conducting liquid transfers heat to the exhaust chamber body 1, so that the exhaust chamber body 1 is heated. In the working process of the electric heating block 32, the torsion spring 82 tightly supports the housing 7 on the annular heating pipe 31, and the housing 7 isolates the electric heating block 32 from the outside, so that the possibility of heat dissipation of the electric heating block 32 is reduced, an operator cannot directly contact the electric heating block 32, and the risk of electric shock accidents is reduced. When the electric heating block 32 needs to be overhauled, an operator can directly rotate the cover 7 to operate the electric heating block 32 without taking down the cover 7; after the overhaul is finished, the operator releases the housing 7, and the torsion spring 82 automatically drives the housing 7 to reset, so that the convenience of operation is improved.

Referring to fig. 3 and 4, the annular heating pipe 31 is provided with a pressure regulating assembly 4, and the pressure regulating assembly 4 includes a sleeve 41, a mounting ring 42 and an elastic diaphragm 43. The annular heating pipe 31 is provided with a pressure regulating port 44, and the mounting ring 42 is arranged along the edge of the pressure regulating port 44 and is fixedly connected with the annular heating pipe 31. The inside wall of collar 42 and the outside wall of sleeve 41 all are equipped with the screw thread, and sleeve 41 wears to establish and threaded connection in collar 42. The elastic diaphragm 43 is disposed at one end of the sleeve 41 far away from the mounting ring 42, the elastic diaphragm 43 seals the port of the sleeve 41, and the edge of the elastic diaphragm 43 is fixedly connected with the inner side wall of the sleeve 41.

Referring to fig. 3 and 4, when the pressure in the exhaust chamber is too different from the ambient pressure, the elastic diaphragm 43 deforms under the action of the pressure difference between the inside and the outside of the annular heating tube 31 until the pressures inside and outside the annular heating tube 31 are rebalanced, thereby achieving the pressure regulation. When the elastic diaphragm 43 needs to be replaced, the operator releases the threaded connection between the sleeve 41 and the mounting ring 42, and then connects the other sleeve 41 to the mounting ring 42 by threads, so that the elastic diaphragm 43 can be replaced. In addition, when the sleeve 41 is removed, the operator can directly replace or supplement the heat transfer fluid in the annular heating pipe 31.

Referring to fig. 3 and 4, a partition plate 9 is fixedly connected in the exhaust chamber body 1, and divides the exhaust chamber body 1 into two cavities 10 along the axial direction of the exhaust chamber body 1, and each of the two cavities 10 is communicated with one exhaust pipe 2. Fixedly connected with arc piece 11 on the chamber wall of cavity 10, the lateral wall of arc piece 11 and the laminating of the chamber wall of cavity 10, arc groove 12 has been seted up on arc piece 11 top. When the operation time of the electric heating block 32 is short, because the exhaust chamber body 1 does not absorb enough heat, part of volatile components in the gas will condense on the cavity wall of the cavity 10 and flow back along the cavity wall of the cavity 10, and finally collect in the arc-shaped groove 12. Thereafter, as the temperature of the degassing chamber body 1 rises, the volatile components collected in the arc-shaped groove 12 gradually change into a gaseous state, and finally leave the cavity 10 through the degassing pipe 2, thereby reducing the possibility of the volatile components flowing back into the degassing pipe 14.

Referring to fig. 2 and 3, a switching assembly 5 is arranged between the exhaust chamber and the discharge pipe 14, the switching assembly 5 comprises a switching pipe 51 and a switching plate 52, the switching pipe 51 is fixedly connected to the outer side wall of the discharge pipe 14, and the switching pipe 51 is communicated with the discharge pipe 14; the conversion plate 52 is rotatably connected to one end of the conversion pipe 51 far away from the discharge pipe 14, and one end of the conversion plate 52 far away from the conversion pipe 51 is attached to the bottom end of the exhaust chamber body 1; the discharge pipe 14 is provided with a driving assembly 6, the driving assembly 6 comprises an air cylinder 61 and a rack 62, the air cylinder 61 is fixedly connected to the outer side wall of the discharge pipe 14, the output end of the air cylinder 61 is fixedly connected with the rack 62, the conversion plate 52 is provided with a latch 63 along the periphery, and the latch 63 is meshed with the rack 62; the switching plate 52 is formed with a switching hole 53, and the switching hole 53 communicates with the switching tube 51. The bottom walls of the two cavities 10 are respectively provided with a connecting hole 54, and the conversion hole 53 is communicated with one of the connecting holes 54.

Referring to fig. 2 and 3, in operation, the air cylinder 61 drives the rack 62 to move, and the rack 62 drives the conversion plate 52 to rotate through the latch 63. During the rotation of the switching plate 52, when the switching hole 53 communicates with one of the connection holes 54, the switching plate 52 blocks the other connection hole 54. After the connection hole 54 is blocked, the air in the cavity 10 is extracted by the air extraction device until the vacuum state in the cavity 10 is achieved. Then, the switching plate 52 continues to rotate until the vacuum reached cavity 10 communicates with the switching hole 53 through the connection hole 54. Then, under the action of the difference between the internal pressure and the external pressure of the cavity 10, the gas carried in the material is sucked into the cavity 10 and leaves the cavity 10 through the discharge pipe 14. Thereafter, the two cavities 10 alternately reach a vacuum state and alternately extract the gas carried in the material. Compared with the case of not arranging the conversion plate 52, after arranging the conversion plate 52, the air pressure difference between the inside and the outside of the exhaust chamber body 1 is further increased because the cavity 10 is in a vacuum state, thereby improving the efficiency of extracting the gas in the material.

The implementation principle of the backflow-preventing vacuum exhaust chamber in the embodiment of the application is as follows: in operation, the air-extracting device extracts air in the cavity 10 through the exhaust pipe 2 until the cavity 10 is in a vacuum state, and then the driving assembly 6 drives the converting plate 52 to rotate until the converting hole 53 is communicated with the connecting hole 54. Thereafter, the gas carried in the material enters the cavity 10 under the action of the pressure difference between the inside and the outside of the cavity 10, and is extracted into the air extraction equipment through the exhaust pipe 2. In the extraction process, the electric heating block 32 heats the heat conducting liquid in the annular heating pipe 31, and the heat conducting liquid transfers heat to the exhaust chamber body 1, so that volatile components in the gas are not easy to be condensed, the possibility that the condensed volatile components flow back into the discharge pipe 14 is reduced, and the quality of the material is improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (8)

1. An anti-backflow vacuum exhaust chamber, characterized in that: including fixed exhaust chamber body (1) that sets up on discharging pipe (14), blast pipe (2) and heating element (3) on locating exhaust chamber body (1) that communicate with exhaust chamber body (1), exhaust chamber body (1) and discharging pipe (14) intercommunication, heating element (3) are established and annular heating pipe (31) and electric heat block (32) of fixed connection on annular heating pipe (31) lateral wall on exhaust chamber body (1) lateral wall including the cover, annular heating pipe (31) are used for holding heat-conducting liquid.

2. The backflow-prevention vacuum exhaust chamber as set forth in claim 1, wherein: seted up pressure regulating mouth (44) on annular heating pipe (31), pressure regulating mouth (44) department is equipped with pressure regulating subassembly (4), pressure regulating subassembly (4) include sleeve (41) of one end and pressure regulating mouth (44) intercommunication and locate sleeve (41) and keep away from elastic diaphragm (43) of annular heating pipe (31) one end, elastic diaphragm (43) and sleeve (41) fixed connection, and will the port shutoff of sleeve (41) is stopped up.

3. The backflow-prevention vacuum exhaust chamber as set forth in claim 2, wherein: pressure regulating subassembly (4) still include collar (42) along the edge setting of pressure regulating mouth (44), collar (42) and annular heating pipe (31) fixed connection, all be equipped with the screw thread on the lateral wall of sleeve (41) and on the inside wall of collar (42), collar (42) are worn to establish into by sleeve (41), and with collar (42) threaded connection.

4. The backflow-prevention vacuum exhaust chamber as set forth in claim 1, wherein: a housing (7) is arranged outside the annular heating pipe (31), the housing (7) is connected with the annular heating pipe (31) through a connecting piece (8), and the housing (7) covers the electric heating block (32).

5. The backflow-prevention vacuum exhaust chamber as claimed in claim 4, wherein: connecting piece (8) establish torsion spring (82) on connecting rod (81) including connecting rod (81) and the cover of fixed connection on housing (7), connecting rod (81) rotate with the lateral wall of annular heating pipe (31) and are connected, the one end and annular heating pipe (31) fixed connection of torsion spring (82), the other end with housing (7) fixed connection, housing (7) are contradicted with annular heating pipe (31).

6. The backflow-prevention vacuum exhaust chamber as set forth in claim 1, wherein: a clapboard (9) is arranged in the exhaust chamber body (1) along the axial direction, the clapboard (9) divides the interior of the exhaust chamber body (1) into a plurality of cavities (10), a plurality of exhaust pipes (2) are arranged, one exhaust pipe (2) is communicated with one cavity (10), a conversion component (5) is arranged between the exhaust chamber body (1) and the discharge pipe (14), the conversion component (5) comprises a conversion pipe (51) fixedly connected to the outer wall of the exhaust pipe (2) and a conversion plate (52) rotatably connected to one end of the conversion pipe (51) close to the cavity (10), the conversion pipe (51) is communicated with the discharge pipe (14), a conversion hole (53) communicated with the conversion pipe (51) is arranged on the conversion plate (52), a connecting hole (54) is formed in the cavity wall of the cavity (10) close to one side of the conversion plate (52), and the conversion hole (53) is communicated with one of the connecting holes (54).

7. The backflow-prevention vacuum exhaust chamber as claimed in claim 6, wherein: be equipped with drive assembly (6) on discharging pipe (14), drive assembly (6) including fixed connection cylinder (61) on discharging pipe (14) and with rack (62) of the output fixed connection of cylinder (61), change-over board (52) are equipped with latch (63) along the periphery, latch (63) and rack (62) meshing.

8. The backflow-prevention vacuum exhaust chamber as claimed in claim 6, wherein: an arc-shaped check block is fixedly connected to the inner side wall of the cavity (10), and an arc-shaped groove (12) is formed in the arc-shaped check block.

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