Automatic air supply device for sleeve extruder

Abstract

The utility model discloses an automatic air supply device for a sleeve extruder, and particularly relates to the technical field of sleeve production and processing, the automatic air supply device comprises an extruder body and an air buffer tank, one end of the extruder body is connected with an extrusion head, and the air buffer tank is arranged on one side of the extruder body. According to the utility model, the switch mechanism and the gas buffer tank are matched for use, so that when the air pressure in the sleeve is higher, the piston can be moved by utilizing the air pressure difference, and the sealing ring can move upwards to shield and reduce the notch of the opening, so as to adjust the air inlet amount and further adjust the air pressure in the sleeve; if yes, the sealing ring moves downwards to increase the notch of the opening, the air inflow is increased, so that the air pressure in the sleeve is adjusted and increased, air can be supplemented into the extrusion head in a self-adaptive mode, the air pressure in the sleeve is adjusted, use is convenient, and practicability is high; and by using the connecting seat, the switch mechanism is convenient to disassemble and assemble, so that the switch mechanism is convenient to disassemble, maintain and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of casing production and processing, in particular to an automatic air supplementing device for a casing extruder. Background Technique

[0002] A casing is an insulating device that introduces a live conductor into an electrical equipment or penetrates a wall. The former is called an electrical appliance casing, and the latter is called a wall-penetrating casing. Casings are usually used in the basement of a building and are iron rings used to protect pipes or facilitate pipe installation. The classifications of casings include rigid casings, flexible waterproof casings, steel pipe casings, and iron sheet casings, etc. There are many types of casings. According to different structural characteristics and main insulating media, they can be divided into three categories: single insulating material casings (including pure porcelain casings, resin casings), composite insulating casings (including oil-filled casings, gas-filled casings), and capacitive casings (including oil-paper capacitive casings, glue-paper capacitive casings). A pure porcelain casing is a casing insulated by porcelain and air. In the production and processing technology of casings, an extruder is required. In the extrusion process of producing casings by the extruder, a gas buffer tank is usually used to control the extrusion air pressure.

[0003] Currently, in most extrusion machine processes for producing casings, workers usually adjust and cooperate with the gas buffer tank to change the amount of compressed gas entering the inner side of the extrusion head of the extruder, thereby changing the air pressure inside the pipe. This method is relatively inconvenient to use, making it unable to detect the change in air pressure inside the pipe and change the amount of gas input into the extrusion head according to the change in the air pressure inside the casing, and it is inconvenient to adaptively adjust the air supplement amount in the extrusion head to achieve automatic air supplement, so the practicability is relatively poor. Summary of the Invention

[0004] The purpose of the utility model is to provide an automatic air supplementing device for a casing extruder to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the utility model provides the following technical solution: an automatic air supplementing device for a casing extruder, including an extruder body and a gas buffer tank. One end of the extruder body is connected with an extrusion head. The gas buffer tank is arranged on one side of the extruder body. The top of the gas buffer tank is provided with an air inlet and an air outlet, and both the air outlet and the air inlet are equipped with regulating valves. The air inlet is connected with a gas compressor through a connecting pipe. The air outlet is connected with a conduit. One end of the conduit is connected with an air delivery port provided at the top of the extrusion head through a switching mechanism. The switching mechanism includes a housing, and the housing is arranged above the extrusion head. The housing is fixedly connected with the conduit. The bottom of the housing is connected with a main pipe, and the main pipe is connected with the extrusion head and is communicated with the air delivery port. An air inlet housing communicated with the main pipe is fixedly installed at the inner bottom of the housing.

[0006] Further, the power on / off mechanism further includes a sealing ring, which is slidably installed inside the air intake housing. Openings are symmetrically formed on the outer wall of the air intake housing. A support plate is fixedly installed inside the sealing ring. A connecting rod is provided inside the housing on the outer side of the air intake housing, and one end of the connecting rod is fixedly connected to the support plate inside the air intake housing. A spring is sleeved on the outer side of the part of the connecting rod located inside the air intake housing, and the spring is located between the support plate and the inner top wall of the air intake housing. One side of the main pipe communicates with a sub-pipe, and the upper end of the sub-pipe extends into the air intake housing. The other end of the connecting rod is connected to a piston inside the sub-pipe. Through the switch mechanism, it can be adjusted accordingly according to the change in the air pressure inside the sleeve, so as to change the size of the opening, change the gas entering the extrusion head, and further change the air pressure inside the sleeve. It can adaptively adjust the air supplement amount following the change in the air pressure inside the sleeve, realize automatic air supplement, and ensure that the sleeve can continuously and stably produce.

[0007] Further, a sealing layer is coated on the outer side of the sealing ring, and the outer wall of the sealing ring is closely attached to the inner wall of the air intake housing. Both ends of the spring are fixedly connected to the support plate and the inner top wall of the air intake housing respectively. The connecting rod is of a U-shaped structure. The structure of the connecting rod enables the linkage between the sealing ring and the limiting ring, and they can move synchronously.

[0008] Further, one limiting ring is respectively provided at the upper and lower parts inside the sub-pipe, and the two limiting rings are located on both sides of the piston to limit the moving position of the limiting ring. A sealing ring is sleeved on the outer wall of the limiting ring to improve the sealing performance.

[0009] Further, a connecting seat is fixedly installed at the top of the extrusion head, and the connecting seat covers the outside of the gas delivery port. The lower outer wall of the main pipe is threadedly connected to the inner wall of the connecting seat, and a sealing gasket is provided between the inner bottom surface of the connecting seat and the lower end of the main pipe to facilitate the disassembly and installation of the switch mechanism and facilitate its disassembly, maintenance and repair.

[0010] Further, the cross-section of the opening is trapezoidal, and the inner diameter of the opening near the inner wall of the air intake housing is smaller than the height of the sealing ring to ensure that the sealing ring can completely close and block the opening.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] 1. Through the combined use of the switch mechanism and the gas buffer tank in the present utility model, when the air pressure inside the sleeve is relatively large, the piston can be moved by using the air pressure difference, so that the sealing ring moves upward to block and reduce the notch of the opening, so as to adjust the air intake volume and thus adjust the air pressure inside the sleeve. When the air pressure inside the sleeve is relatively small, the sealing ring will move downward to adjust and enlarge the notch of the opening, increasing the air intake volume to adjust and increase the air pressure inside the sleeve. It can adaptively supplement air to the extrusion head to adjust the air pressure inside the pipe, which is convenient to use and has strong practicability;

[0013] 2. The utility model facilitates the disassembly and assembly of the switching mechanism through the use of the connecting seat, so as to disassemble, maintain and replace it. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, and do not constitute a limitation to the utility model. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the whole of the utility model;

[0016] Figure 2 is the utility model Figure 1 an enlarged schematic structural diagram of A therein;

[0017] Figure 3 is a partial schematic structural diagram between the air inlet housing and the sealing ring of the utility model;

[0018] Figure 4 is a schematic structural diagram of the connecting seat of the utility model;

[0019] In the figures: 1, extruder body; 2, extrusion head; 3, gas buffer tank; 4, gas compressor; 5, air inlet; 6, air outlet; 7, conduit; 8, housing; 9, main pipe; 10, connecting seat; 11, air inlet housing; 12, sealing ring; 13, support plate; 14, opening; 15, auxiliary pipe; 16, limiting ring; 17, piston; 18, connecting rod; 19, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0021] As Figure 1 - Figure 4An automatic air supplement device for a casing extruder, as shown, includes an extruder body 1 and a gas buffer tank 3. One end of the extruder body 1 is connected to an extrusion head 2. The gas buffer tank 3 is arranged on one side of the extruder body 1. An air inlet 5 and an air outlet 6 are provided at the top of the gas buffer tank 3, and both the air outlet 6 and the air inlet 5 are equipped with regulating valves. The air inlet 5 is connected to a gas compressor 4 through a connecting pipe. The air outlet 6 is connected to a conduit 7. One end of the conduit 7 is connected to an air delivery port provided at the top of the extrusion head 2 through a switching mechanism. The switching mechanism includes a housing 8, and the housing 8 is arranged above the extrusion head 2. The housing 8 is fixedly connected to the conduit 7. The bottom of the housing 8 is connected to a main pipe 9. The main pipe 9 is connected to the extrusion head 2 and is communicated with the air delivery port. An air inlet housing 11 communicated with the main pipe 9 is fixedly installed at the inner bottom of the housing 8.

[0022] In this example, the switching mechanism further includes a sealing ring 12, and the sealing ring 12 is slidably installed inside the air inlet housing 11. Openings 14 are symmetrically formed on the outer wall of the air inlet housing 11. A support plate 13 is fixedly installed inside the sealing ring 12. A connecting rod 18 is arranged inside the housing 8 on the outer side of the air inlet housing 11, and one end of the connecting rod 18 is fixedly connected to the support plate 13 inside the air inlet housing 11. A spring 19 is sleeved on the outer side of the part of the connecting rod 18 located inside the air inlet housing 11, and the spring 19 is located between the support plate 13 and the inner top wall of the air inlet housing 11. A secondary pipe 15 is communicated with one side of the main pipe 9, and the upper end of the secondary pipe 15 extends into the air inlet housing 11. The other end of the connecting rod 18 is connected to a piston 17 inside the secondary pipe 15. Through the switching mechanism, it can be adjusted accordingly according to the change in the air pressure inside the casing, thereby changing the size of the opening 14, changing the gas entering the extrusion head 2, and further changing the air pressure inside the casing, and can adaptively adjust the air supplement amount following the change in the air pressure inside the casing to achieve automatic air supplement and ensure continuous and stable production of the casing. In this example, a sealing layer is coated on the outer side of the sealing ring 12, and the outer wall of the sealing ring 12 is closely attached to the inner wall of the air inlet housing 11. Both ends of the spring 19 are fixedly connected to the support plate 13 and the inner top wall of the air inlet housing 11 respectively. The connecting rod 18 is of a U-shaped structure, and the structure of the connecting rod 18 enables the linkage between the sealing ring 12 and the limiting ring 16 and allows them to move synchronously. In this example, a limiting ring 16 is respectively arranged above and below inside the secondary pipe 15, and the two limiting rings 16 are located on both sides of the piston 17 to limit the moving position of the limiting ring 16. A sealing ring is sleeved on the outer wall of the limiting ring 16 to improve the sealing performance. In this example, a connecting seat 10 is fixedly installed at the top of the extrusion head 2, and the connecting seat 10 covers the outside of the air delivery port. The lower outer wall of the main pipe 9 is threadedly connected to the inner wall of the connecting seat 10, and a sealing gasket is arranged between the inner bottom surface of the connecting seat 10 and the lower end of the main pipe 9 to facilitate the disassembly and installation of the switching mechanism and convenient disassembly, maintenance and repair. In this example, the cross-section of the opening 14 is trapezoidal, and the inner diameter of the opening 14 close to the inner wall of the air inlet housing 11 is smaller than the height of the sealing ring 12 to ensure that the sealing ring 12 can completely close and block the opening 14.

[0023] Working principle of the utility model: During use, start the gas compressor 4 to compress the gas. After the compressed gas enters the gas buffer tank 3, it is transported to the housing 8 through the conduit 7, and then transmitted to the extrusion head 2 through the opening 14 and the main pipe 9 and enters the sleeve. The air pressure in the pipe gradually increases until it is equal to and balanced with the air pressure transported by the extrusion head 2 and the gas buffer tank 3. Then, when the air pressure in the sleeve increases, the piston 17 will move upward in the auxiliary pipe 15, and push the connecting rod 18 to drive the support plate 13 and the sealing ring 12 to move upward synchronously, so that the sealing ring 12 gradually blocks the opening 14, reducing or stopping the gas from entering the extrusion head 2, thereby adjusting the air pressure in the pipe. When the air pressure in the pipe gradually decreases to be equal to the air pressure transported in the air inlet housing 11, the sealing ring 12 moves downward and resets under the elastic force of the spring 19, so that the sealing ring 12 and the piston 17 return to the initial position. When the air pressure in the sleeve decreases, the piston 17 can move downward in the auxiliary pipe 15, and drive the sealing ring 12 to move downward through the connecting rod 18, gradually reducing the blocking area of the opening 14, thereby increasing the gas inlet, and then increasing the air pressure in the pipe, making it return to the initial state again. It can adaptively adjust the gas volume input into the extrusion head 2 according to the change of the air pressure in the pipe, realize automatic air replenishment, automatically adjust the air pressure in the sleeve, and is more convenient to use and has stronger practicability.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An automatic air supplement device for a casing extruder, comprising an extruder body (1) and a gas buffer tank (3), characterized in that: One end of the extruder body (1) is connected to an extrusion head (2), the gas buffer tank (3) is arranged on one side of the extruder body (1), an air inlet (5) and an air outlet (6) are arranged at the top of the gas buffer tank (3), and both the air outlet (6) and the air inlet (5) are provided with regulating valves. The air inlet (5) is connected to a gas compressor (4) through a connecting pipe, the air outlet (6) is connected to a conduit (7), one end of the conduit (7) is connected to an air delivery port provided at the top of the extrusion head (2) through a switching mechanism. The switching mechanism comprises a housing (8), and the housing (8) is arranged above the extrusion head (2). The housing (8) is fixedly connected to the conduit (7). The bottom of the housing (8) is connected to a main pipe (9), the main pipe (9) is connected to the extrusion head (2), and the main pipe (9) is communicated with the air delivery port. An air inlet housing (11) communicated with the main pipe (9) is fixedly installed at the inner bottom of the housing (8).

2. The automatic air supplementing device for a casing extruder according to claim 1, wherein: The switching mechanism further comprises a sealing ring (12), and the sealing ring (12) is slidably installed inside the air inlet housing (11). Openings (14) are symmetrically formed on the outer wall of the air inlet housing (11). A support plate (13) is fixedly installed inside the sealing ring (12). A connecting rod (18) is arranged inside the housing (8) on the outer side of the air inlet housing (11), and one end of the connecting rod (18) is fixedly connected to the support plate (13) inside the air inlet housing (11). A spring (19) is sleeved on the outer side of the part of the connecting rod (18) located inside the air inlet housing (11), and the spring (19) is located between the support plate (13) and the inner top wall of the air inlet housing (11). A secondary pipe (15) is communicated with one side of the main pipe (9), and the upper end of the secondary pipe (15) extends into the air inlet housing (11). The other end of the connecting rod (18) is connected to a piston (17) inside the secondary pipe (15).

3. The automatic air supplement device for a casing extruder according to claim 2, characterized in that: The outer side of the sealing ring (12) is coated with a sealing layer, and the outer wall of the sealing ring (12) is closely attached to the inner wall of the air inlet housing (11). Both ends of the spring (19) are fixedly connected to the support plate (13) and the inner top wall of the air inlet housing (11) respectively. The connecting rod (18) is of a U-shaped structure.

4. The automatic air supplementing device for a casing extruder according to claim 2, characterized in that: One limiting ring (16) is respectively arranged at the upper and lower parts inside the secondary pipe (15), and the two limiting rings (16) are located on both sides of the piston (17). A sealing ring is sleeved on the outer wall of the limiting ring (16).

5. The automatic air supplementing device for a casing extruder according to claim 2, wherein: A connecting seat (10) is fixedly installed at the top of the extrusion head (2), and the connecting seat (10) covers the outside of the air delivery port. The outer wall of the lower end of the main pipe (9) is threadedly connected to the inner wall of the connecting seat (10), and a sealing gasket is arranged between the inner bottom surface of the connecting seat (10) and the lower end of the main pipe (9).

6. The automatic air supplementing device for a casing extruder according to claim 2, characterized in that: The cross section of the opening (14) is trapezoidal, and the inner diameter of the opening (14) close to the inner wall of the air inlet housing (11) is smaller than the height of the sealing ring (12).

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