CN111560527A

CN111560527A - Vacuum exhaust equipment before casting for casting production

Info

Publication number: CN111560527A
Application number: CN202010321405.0A
Authority: CN
Inventors: 沈升好
Original assignee: Anhui Fanchang Wannan Valve Casting Co Ltd
Current assignee: Anhui Fanchang Wannan Valve Casting Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-08-21

Abstract

The invention relates to the technical field of metal casting, and discloses vacuum exhaust equipment for casting production, which comprises a box body, wherein the left side and the right side of the box body are both communicated with an inlet pipe and an outlet pipe; the melt jacking mechanism comprises a jacking hole, a support frame with a U-shaped section, a driving motor, a threaded rod and a threaded pipe, wherein the jacking hole is formed in the center of the bottom of the left cavity. This vacuum exhaust equipment before casting is used in foundry goods production can solve the end in-process of degasification at present at every turn, loses the supply of outside fuse-element, all can remain partial fuse-element in the left side cavity, and this partial fuse-element can't flow through the slope top surface of division wall to cause the extravagant problem of this partial fuse-element.

Description

Vacuum exhaust equipment before casting for casting production

Technical Field

The invention relates to the technical field of metal casting, in particular to a vacuum exhaust device used before casting for casting production.

Background

Many nonferrous metals and their alloys will absorb certain gases during smelting and pouring, and these gases will be separated out after the metal and its alloy melt (melt for short) is solidified, which causes the defect of casting, so the products with high requirements often need to add degassing process before casting. Degassing is performed in many ways, including vacuum degassing, which is performed by creating an environment (vacuum environment for short) below one atmosphere in a closed space and allowing the melt to contact with the environment sufficiently to allow the gas inside the melt to escape into the environment and be pumped away. Most of the existing vacuum degassing equipment adopts a blowing and stirring mode, and the blowing and stirring function is to roll the melt to be fully contacted with a vacuum environment. However, this degassing method is complicated in structure and requires high maintenance costs.

The CN109439920A publication number discloses a vacuum degassing device before casting, when in use, a vacuum pump is started to pump negative pressure to the whole box body, the liquid level of the melt in the box body is raised relative to the outside under the action of the external atmospheric pressure, when the liquid level is slightly higher than the separation wall, the melt starts to flow from the left chamber to the right chamber and passes through the inclined top surface of the separation wall 5 to form a large-area film, so that the melt is fully contacted with the vacuum environment, and a good degassing effect is achieved; the proposal still has the following technical defects:

at the end of each degassing, the supply of external melt is lost and a part of the melt remains in the left chamber, which cannot flow through the inclined top surface of the partition wall, thus causing a waste of this part of the melt.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a vacuum exhaust device for casting production before casting, which has the advantage of avoiding melt waste, and solves the problem that part of melt is wasted because the part of melt cannot flow through the inclined top surface of the partition wall because the part of melt is remained in the left cavity due to the loss of the supply of external melt in the final degassing process at each time at present.

(II) technical scheme

In order to realize the purpose of avoiding melt waste, the invention provides the following technical scheme: a vacuum exhaust device used for casting production and used before casting comprises a box body, wherein the left side and the right side of the box body are both communicated with an inlet pipe and an outlet pipe, the top of the box body is communicated with an exhaust pipe, a vacuum pump is installed in the exhaust pipe, the inner box bottom of the box body is fixedly connected with a partition wall, the box body is divided into a left cavity and a right cavity by the partition wall, a melt jacking plate is arranged in the left cavity, and the lower end of the melt jacking plate is connected with a melt jacking mechanism;

fuse-element climbing mechanism includes jacking hole, section support frame, driving motor, threaded rod and the screwed pipe that is the U type, the bottom center department at left cavity is seted up in the jacking hole, the position fixed connection that the support frame corresponds the jacking hole is at the outer bottom of the case of box, driving motor fixed connection is in the interior bottom center department of support frame, the one end fixed connection of screwed pipe is in the lower extreme center department of fuse-element jacking board, the other end of screwed pipe passes the jacking hole and extends to the support frame in, the one end of threaded rod is connected with driving motor's output through the shaft coupling, the other end of threaded rod extends to in the screwed pipe, and threaded rod and screwed pipe threaded connection, the spacing subassembly fixed connection that the outer pipe wall of screwed pipe set up through two symmetries is on the vertical inside wall that the support frame corresponds.

Preferably, spacing subassembly includes that spacing ring and section are the gag lever post of L type, the horizontal end fixed connection of gag lever post is on the vertical inside wall of support frame, the fixed position connection that the gag lever post corresponds the gag lever post is on the screwed pipe is close to the outer pipe wall of lower extreme position, the vertical end of gag lever post passes the gag lever post setting, and gag lever post sliding connection is served at the vertical of gag lever post.

Preferably, a sealing groove is formed in each vertical side wall of each side of the melt jacking plate, a sealing strip is fixedly connected to the bottom of the sealing groove, and one end, away from the bottom of the sealing groove, of the sealing strip is arranged on the cavity wall of the left cavity.

Preferably, the upper end of the vertical end of the limiting rod is fixedly connected with a limiting block.

Preferably, the pole wall at the vertical end of the limiting rod is provided with scale values, a plurality of rolling balls are uniformly embedded in the inner ring wall of the limiting ring at equal intervals, and the balls are connected to the pole wall of the limiting rod in a rolling manner.

Preferably, a plurality of diversion trenches are uniformly and equidistantly formed in the top of the partition wall.

Preferably, a vacuum gauge is installed on the exhaust pipe below the vacuum pump.

(III) advantageous effects

Compared with the prior art, the invention provides a vacuum exhaust device used for casting production before casting, which has the following beneficial effects:

this vacuum exhaust equipment before foundry goods production is with casting, through setting up fuse-element jacking plate, the jacking hole, driving motor, threaded rod and screwed pipe, when the degasification process is about to the end, fuse-element jacking plate upper end still remains the part fuse-element in the left side cavity, start driving motor, driving motor drives the threaded rod and rotates, make the threaded rod do clockwise rotation in the screwed pipe, spacing through spacing subassembly, along with the clockwise rotation of threaded rod, the screwed pipe drives fuse-element jacking plate upward movement, and then upwards promotes the surplus fuse-element of fuse-element jacking plate upper end in the left side cavity, even there is not the continuation of outside fuse-element to supply, also can make the slope top surface of remaining fuse-element slowly flowing through the partition wall under the negative pressure condition, realize the exhaust of surplus fuse-element, avoid causing the fuse-.

Drawings

FIG. 1 is a schematic structural diagram of a vacuum exhaust apparatus before casting for casting production according to the present invention;

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

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is a plan view of a partition wall in a vacuum exhaust apparatus before casting for casting production according to the present invention.

In the figure: the device comprises a box body 1, an inlet pipe 2, an outlet pipe 3, a vacuum pump 4, a partition wall 5, a left cavity 6, a right cavity 7, a melt jacking plate 8, a jacking hole 9, a support frame 10, a driving motor 11, a threaded rod 12, a threaded pipe 13, a limiting ring 14, a limiting rod 15, a sealing groove 16, a sealing strip 17, a limiting block 18, a scale value 19, a ball 20, a diversion trench 21, a vacuum meter 22 and an exhaust pipe 23.

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.

Referring to fig. 1-4, a vacuum exhaust device for casting production comprises a box body 1, wherein the left side and the right side of the box body 1 are both communicated with an inlet pipe 2 and an outlet pipe 3, the top of the box body 1 is communicated with an exhaust pipe 23, a vacuum pump 4 is installed in the exhaust pipe 23, the inner bottom of the box body 1 is fixedly connected with a partition wall 5, the box body 1 is divided into a left chamber 6 and a right chamber 7 by the partition wall 5, a melt lifting plate 8 is arranged in the left chamber 6, and the lower end of the melt lifting plate 8 is connected with a melt lifting mechanism;

the melt jacking mechanism comprises a jacking hole 9, a supporting frame 10 with a U-shaped section, a driving motor 11, a threaded rod 12 and a threaded pipe 13, wherein the jacking hole 9 is arranged at the center of the bottom of the left cavity 6, the supporting frame 10 is fixedly connected to the bottom of an outer box of the box body 1 corresponding to the jacking hole 9, the driving motor 11 is fixedly connected to the center of the inner bottom of the supporting frame 10, one end of the threaded pipe 13 is fixedly connected to the center of the lower end of the melt jacking plate 8, the other end of the threaded pipe 13 penetrates through the jacking hole 9 and extends into the supporting frame 10, one end of the threaded rod 12 is connected with the output end of the driving motor 11 through a coupler, the other end of the threaded rod 12 extends into the threaded pipe 13, the threaded rod 12 is in threaded connection with the threaded pipe 13, the outer pipe wall of the threaded pipe 13 is fixedly connected to the corresponding vertical inner side wall of the supporting, the fuse-element 8 upper end is remaining part fuse-element in the left side cavity 6, start driving motor 11, driving motor 11 drives threaded rod 12 and rotates, make threaded rod 12 do clockwise rotation in screwed pipe 13, spacing through spacing subassembly, along with the clockwise rotation of threaded rod 12, screwed pipe 13 drives fuse-element jacking plate 8 upward movement, and then upwards promote the remaining fuse-element of fuse-element jacking plate 8 upper end in the cavity 6 of a left side, even there is not the continuation of outside fuse-element to supply, also can make the slope top surface of remaining fuse-element slowly flowing through division wall 5 under the negative pressure condition, realize the exhaust of remaining fuse-element, avoid causing the fuse-element extravagant.

Spacing subassembly includes that spacing ring 14 and cross-section are the gag lever post 15 of L type, the horizontal end fixed connection of gag lever post 15 is on the vertical inside wall of support frame 10, the position fixed connection that gag lever post 14 corresponds gag lever post 15 is on the outer pipe wall that screwed pipe 13 is close to lower extreme position, the vertical end of gag lever post 15 passes the setting of

gag lever post

14, and 14 sliding connection of gag lever post is served at the vertical of gag lever post 15, because gag lever post 14 can only slide on gag lever post 15, and then spacing to the screwed pipe 13 direction of motion that is connected with gag lever post 14, make screwed pipe 13 can only be the motion of vertical direction, prevent that screwed pipe 13 from receiving the turning force of threaded rod 12 and taking place to rotate.

Seal groove 16 has all been seted up on the vertical lateral wall of every side of fuse-element jacking board 8, the tank bottom fixedly connected with sealing strip 17 of seal groove 16, and the one end setting that sealing strip 17 kept away from the tank bottom of seal groove 16 has improved the leakproofness between fuse-element jacking board 8 and the 6 chamber walls of left chamber through sealing strip 17 on the chamber wall of left chamber 6.

The upper end of the vertical end of the limiting rod 15 is fixedly connected with a limiting block 18, so that the limiting ring 14 is prevented from being separated from the limiting rod 15.

Be equipped with scale interval 19 on the pole wall of the vertical end of gag lever post 15, be convenient for know the height that screwed pipe 13 rose through scale interval 19, and even equidistance inlays on the inner ring wall of spacing ring 14 and has the rolling ball 20 of a plurality of, and ball 20 roll connection is on the pole wall of gag lever post 15, and when taking place relative motion between gag lever post 15 and the spacing ring 14, ball 20 rolls on gag lever post 15, reduces the frictional resistance of gag lever post 14 on the motion of gag lever post 15.

A plurality of diversion trenches 21 are uniformly and equidistantly formed in the top of the partition wall 5, so that the stability of the melt flowing through the partition wall 5 is improved, and overlarge turbulent flow is prevented.

A vacuum gauge 22 is installed on the exhaust pipe 23 located below the vacuum pump 4, and the vacuum gauge 22 is used for monitoring the vacuum degree of the chamber 1 in real time, thereby accurately controlling the flow rate.

In summary, according to the vacuum exhaust equipment used before casting for casting production, when the degassing process is about to end, a part of melt is left at the upper end of the melt lifting plate 8 in the left chamber 6, the driving motor 11 is started, the driving motor 11 drives the threaded rod 12 to rotate, so that the threaded rod 12 rotates clockwise in the threaded pipe 13, through the limiting of the limiting component, along with the clockwise rotation of the threaded rod 12, the threaded pipe 13 drives the melt lifting plate 8 to move upwards, and further the remaining melt at the upper end of the melt lifting plate 8 in the left chamber 6 is pushed upwards, even if no external melt is continuously supplemented, the remaining melt can slowly flow through the inclined top surface of the separation wall 5 under the negative pressure condition, the exhaust of the remaining melt is realized, and the waste of the melt is avoided.

It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a vacuum exhaust equipment before casting for foundry goods production, includes box (1), its characterized in that: the left side and the right side of the box body (1) are both communicated with an inlet pipe (2) and an outlet pipe (3), the top of the box body (1) is communicated with an exhaust pipe (23), a vacuum pump (4) is installed in the exhaust pipe (23), the inner bottom of the box body (1) is fixedly connected with a partition wall (5), the box body (1) is divided into a left chamber (6) and a right chamber (7) through the partition wall (5), a melt jacking plate (8) is arranged in the left chamber (6), and the lower end of the melt jacking plate (8) is connected with a melt jacking mechanism;

the fuse-element climbing mechanism includes jacking hole (9), support frame (10), driving motor (11), threaded rod (12) and screwed pipe (13) that the section is the U type, the bottom center department at left cavity (6) is seted up in jacking hole (9), the position fixed connection that support frame (10) corresponds jacking hole (9) is at the bottom of the outer container of box (1), driving motor (11) fixed connection is in the interior bottom center department of support frame (10), the one end fixed connection of screwed pipe (13) is in the lower extreme center department of fuse-element jacking board (8), the other end of screwed pipe (13) passes jacking hole (9) and extends to support frame (10) interior, the one end of threaded rod (12) is passed through the shaft coupling and is connected with the output of driving motor (11), the other end of threaded rod (12) extends to in screwed pipe (13), and threaded rod (12) and screwed pipe (13) threaded connection, the outer pipe wall of the threaded pipe (13) is fixedly connected to the corresponding vertical inner side wall of the support frame (10) through two symmetrically arranged limiting assemblies.

2. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 1, wherein: spacing subassembly includes that spacing ring (14) and section are gag lever post (15) of L type, the horizontal end fixed connection of gag lever post (15) is on the vertical inside wall of support frame (10), the position fixed connection that gag lever post (14) corresponds gag lever post (15) is on screwed pipe (13) are close to the outer pipe wall of lower extreme position, the vertical end of gag lever post (15) passes gag lever post (14) and sets up, and gag lever post (14) sliding connection is served at the vertical of gag lever post (15).

3. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 1, wherein: seal groove (16) have all been seted up on the vertical lateral wall of every side of fuse-element jacking board (8), the tank bottom fixedly connected with sealing strip (17) of seal groove (16), the one end setting that seal groove (16) tank bottom was kept away from in sealing strip (17) is on the chamber wall of left cavity (6).

4. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 2, wherein: the upper end of the vertical end of the limiting rod (15) is fixedly connected with a limiting block (18).

5. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 2, wherein: be equipped with scale interval (19) on the pole wall of gag lever post (15) vertical end, and even equidistance inlays on the interior rampart of spacing ring (14) and has the rolling ball of a plurality of (20), ball (20) roll connection is on the pole wall of gag lever post (15).

6. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 1, wherein: the top of the partition wall (5) is uniformly and equidistantly provided with a plurality of diversion trenches (21).

7. A vacuum exhaust apparatus for use before casting for the production of a casting according to claim 1, wherein: and a vacuum meter (22) is arranged on an exhaust pipe (23) positioned below the vacuum pump (4).