WO2016074246A1

WO2016074246A1 - Sand shooting exhausting and noise reduction method and mechanism for core shooting machine

Info

Publication number: WO2016074246A1
Application number: PCT/CN2014/091204
Authority: WO
Inventors: 徐磊磊
Original assignee: 苏州明志科技有限公司
Priority date: 2014-11-14
Filing date: 2014-11-14
Publication date: 2016-05-19

Abstract

A sand shooting exhausting and noise reduction method and mechanism for a core shooting machine are used for reducing the exhaust noise of the sand shooting exhausting mechanism. The method comprises the following steps: 1) exhausting at a low flow rate, controlling the drift diameter of a vent valve to be DN6 to DN25, and enabling high-pressure gas in a sand shooting barrel to be exhausted into a silencer (8) by sequentially passing through a vent net (4) and a vent pipe (5) at a low flow rate, so that the gas pressure in the sand shooting barrel (2) is reduced to 1 bar to 2 bar; and 2) exhausting at a high flow rate, controlling the drift diameter of the vent valve to be DN32 to DN80, and enabling low-pressure gas in the sand shooting barrel (2) to be exhausted into the silencer by sequentially passing through the vent net (4) and the vent pipe (5) at a high flow rate. By means of the sand shooting exhausting and noise reduction method, the noise generated by sand shooting exhausting can be reduced, the phenomenon of sand attached to the sand shooting vent net can be avoided and the service life of the vent net can be prolonged.

Description

Description: A method and mechanism for sand emission and exhaust noise reduction of a core shooting machine

[0001] The present invention relates to a sandblasting exhaust noise reduction method, and more particularly to a sand shooting and exhaust noise reduction method and mechanism of a core shooting machine.

Background technique

[0002] After the shot shooting machine shoots sand, it is necessary to perform the sand blasting operation to avoid the pressure inside the sand core greatly affecting the quality of the sand core, and avoiding the leakage and ashing of the nozzle caused by the pressure of the sandblasting cylinder. Appears, usually in order to achieve sand blasting, the core shooting machine sanding mechanism needs to be vented, see Figure 1, as shown in the legend, the sand blasting mechanism includes the sanding head device and the exhaust device, the sand blasting head The device comprises a sand chamber 1, a sand chamber 2 and a sanding head 3. The exhaust device comprises an exhaust net 4, an exhaust pipe 5, a main exhaust valve 6, a hose 7 and a muffler 8, and the sand is shot after sand shooting. The molding sand in the cylinder 2 is injected into the cavity through the sanding head 3, the main exhaust valve 6 is smashed, and the residual gas in the sanding cylinder 2 rises through the exhaust net 4 into the sand chamber 12, and then rises through the row. The air pipe 5 and the main exhaust valve 6 and the hose 7 are injected into the sand muffler 8.

technical problem

[0003] The drawbacks of the prior art are:

[0004] 1, usually in order to meet the fast exhaust valve diameter (DN32 ~ DN 80) will be relatively large, in the face of the shotgun a large number of high-pressure gas (3ba _r ~ 5bar) suddenly discharged, noise is very large The existing muffler device can not play the effect of noise reduction and noise reduction very well;

[0005] 2. A large amount of high-pressure gas in the sand injection cylinder is suddenly discharged, which has a great impact on the sand-blasting exhaust net, and will bring a part of the sand to the sand-blasting exhaust net to block the exhaust net and affect the sand shooting effect. And the solution to the problem of the life of the exhaust network

Technical solution

[0006] An object of the present invention is to provide a sand shooting exhaust noise reduction method for a core shooter, which can reduce the noise generated by the sandblasting exhaust gas, avoid the occurrence of sand sticking in the sandblasting exhaust net, and prolong the exhaust. Net life.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a sand shooting exhaust noise reduction of a core shooting machine a method for reducing exhaust noise of a sand blasting mechanism, the sand blasting mechanism comprising a blasting head device and an exhausting device, the blasting head device mainly comprising a gas storage bag, an intake pipe, and an intake valve And a sand chamber and a sand chamber, the exhaust device is mainly composed of an exhaust net, an exhaust pipe, an exhaust valve and a silencer, wherein the sand chamber has an intake port, an air outlet port and an exhaust port. The intake port communicates with the air bag through the intake pipe, the air outlet port is provided with the exhaust net and communicates with the sand shooting tube in an operating state, and the exhaust port passes through the exhaust pipe Connecting the muffler, the intake valve is disposed on the intake pipe, and the exhaust valve is disposed on the exhaust pipe, and the sandblasting exhaust noise reduction method comprises the following steps:

[0008] (1) a small flow of exhaust gas, the diameter of the exhaust valve is controlled to be DN6 ~ DN25, so that the high pressure gas in the sand injection cylinder is first passed through the exhaust net and the row by a small flow rate The trachea is discharged into the muffler to reduce the gas pressure in the sandblasting cylinder to 1 bar to 2 bar;

[0009] (2) large-flow exhaust gas, controlling the diameter of the exhaust valve to be DN32~DN80, so that the low-pressure gas in the shot [0010] cylinder passes through the exhaust net in a large flow manner And discharging the exhaust pipe into the muffler

[0011] In a further technical solution, the method of controlling the diameter of the exhaust valve is to set the exhaust valve as an adjustable exhaust valve with an adjustable displacement.

[0012] In a further technical solution, the method for controlling the diameter of the exhaust valve is to set the exhaust valve as a parallel pre-exhaust valve and a main exhaust valve, a small flow exhaust port, and hiccup The pre-exhaust valve closes the main exhaust valve, the large-flow exhaust port, and the main exhaust valve.

[0013] The present invention also provides another technical solution: a sand shooting and exhausting mechanism of a core shooting machine, comprising a sanding head device and an exhausting device, the sanding head device is mainly composed of a gas storage bag, an air intake pipe, and an intake device. The air valve, the sand chamber and the sand chamber are mainly composed of an exhaust network, an exhaust pipe, an exhaust valve and a silencer, and the sand chamber has an intake port, an air outlet port and an exhaust gas. a port, the air inlet port communicates with the air bag through the air intake pipe, the air outlet port is provided with the exhaust net and communicates with the sand metering cylinder in an operating state, and the exhaust port passes through the row The air pipe is connected to the muffler, the intake valve is disposed on the intake pipe, the exhaust valve is disposed on the exhaust pipe, and the exhaust valve is set to be adjustable The exhaust valve, or the exhaust valve, includes a pre-exhaust valve and a main exhaust valve in parallel, the pre-exhaust valve being provided as a small-diameter valve, the main exhaust valve being provided as a large-diameter valve. [0014] In a further technical solution, the diameter of the pre-exhaust valve is DN6~DN25.

[0015] In a further technical solution, the main exhaust valve has a diameter of DN32 to DN80.

Advantageous effects of the invention

Beneficial effect

[0016] Due to the above technical solutions, the present invention has the following advantages over the prior art:

[0017] 1. The combined application of an adjustable exhaust valve or a pre-exhaust valve and a main exhaust valve, and a sequential snoring method

, to achieve the noise reduction effect of the sand blasting device;

[0018] 2. The pre-exhaust valve adopts a small-diameter valve, and the exhaust valve adopts a large-diameter valve, and the adjustable exhaust valve is first adjusted to a small displacement or a pre-exhaust valve to first snoring, and a small flow rate is adopted. The high-pressure gas is depressurized and discharged, and no noise is generated. After the pressure drops to a certain value, the adjustable exhaust valve is first adjusted to a large displacement or after the main exhaust valve, and the large-flow gas is discharged, because there is no high pressure. The effect is that no noise will be generated and the sand in the sandblasting cylinder will not be carried to the exhaust net.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a sand shooting and exhausting mechanism of a core shooter in the prior art;

2 is a schematic structural view of a sand blasting and exhausting noise reduction mechanism of the core shooting machine of the present invention.

[0021] wherein

[0022] 1, sand chamber; 2, sand injection tube; 3, sand head; 4, exhaust net; 5, exhaust pipe; 6, main exhaust valve; 7, hose; 8, silencer; 9, pre-exhaust valve.

Embodiments of the invention

[0023] Embodiment 1

[0024] Referring to FIG. 2, as shown in the legend, a sand shooting and exhausting mechanism of a core shooting machine includes a sanding head device and an exhausting device, and the sanding head device includes a gas storage bag (not shown in the figure) , the intake pipe (not shown in the figure), the intake valve (not shown in the figure), the sand chamber 1, the sand chamber 2, and the sanding head 3, the exhaust device mainly includes an exhaust net 4 Exhaust pipe 5, main exhaust valve 6, pre-exhaust valve 7 and muffler 8, the sand chamber 1 has an intake port, an air outlet port and an exhaust port, and the intake port communicates with the air bag through the intake pipe, and the air outlet The port is provided with an exhaust net 4 and is connected to the shotgun 2 in an operating state, and the exhaust port is connected to the muffler 8 through the exhaust pipe 5 and the hose 7, and the intake valve is disposed on the intake pipe, and the main exhaust valve is set 6 and The pre-exhaust valve 9 is placed on the exhaust pipe 5, the diameter of the pre-discharge valve 9 is DN6, and the diameter of the main exhaust valve 6 is DN32. The method for de-noising the sand-blasting exhaust gas includes the following steps:

[0025] (1) a small flow of exhaust gas, smashing the pre-exhaust valve 9, so that the high-pressure gas in the sand-blasting cylinder 2 is first discharged through the exhaust network 4 and the exhaust pipe 5, the hose 7 through a small flow rate Into the muffler 8, the pressure of the gas in the sand chamber 2 is lowered, so that the gas pressure in the sand chamber 2 is reduced to 1 bar;

[0026] Large flow of exhaust gas, smashing the main exhaust valve 6, allowing the low pressure gas in the sand chamber 2 to pass through the large flow

[0027] The quantity is sequentially discharged into the muffler 8 through the exhaust net 4, the exhaust pipe 5, and the hose 7.

[0028] Embodiment 2

[0029] The rest is the same as the first embodiment, except that the pre-exhaust valve has a diameter of DN10, the main exhaust valve has a diameter of DN50, a small flow exhaust port, and the gas pressure in the sandblasting cylinder. Reduce to 2bar.

[0030] Embodiment 3

[0031] The rest is the same as the first embodiment except that the diameter of the pre-discharge valve is DN25, the diameter of the main exhaust valve is DN80, and the gas pressure in the above-mentioned shotgun is reduced to 1.5 bar.

[0032] Embodiment 4

[0033] The rest is the same as any of the first to third embodiments, except that the exhaust valve is set to be adjustable

[0034] Adjustable exhaust valve with displacement, small flow exhaust, snoring and adjustment of adjustable exhaust valve, its diameter is D N6 ~ DN25, large flow exhaust 吋, adjustable adjustable exhaust Valve, its diameter is DN32 ~ DN80.

Claims

Claim

[Claim 1] A sandblasting exhaust noise reduction method for a core shooter for reducing exhaust noise of a sandblasting exhaust mechanism, the sandblasting exhaust mechanism including a sandblasting head device and an exhausting device The description sand head device is mainly composed of a gas storage bag, an intake pipe, an intake valve, a sand shooting chamber and a sand shooting cylinder, and the exhaust device is mainly composed of an exhaust net, an exhaust pipe, an exhaust valve and a silencer. The blasting chamber has an intake port, an air outlet port, and an exhaust port, and the air inlet port communicates with the air storage bag through the air intake pipe, and the air outlet port is provided with the exhaust air network and is connected in a working state The exhausting port is connected to the muffler through the exhaust pipe, the intake valve is disposed on the intake pipe, and the exhaust valve is disposed on the exhaust pipe. The method for removing sand and exhaust gas noise includes the following steps:

(1) a small flow of exhaust gas, controlling the diameter of the exhaust valve to be DN6 to DN25, so that the high pressure gas in the sandblasting cylinder is firstly passed through the exhaust net and the exhaust pipe through a small flow rate Into the muffler, the gas pressure in the sandblasting cylinder is reduced to lbar ~ 2ar;

(2) Large-flow exhaust gas, controlling the diameter of the exhaust valve to be DN32~DN80, so that the low-pressure gas in the sand-blasting cylinder is discharged through the exhaust net and the exhaust pipe through a large flow rate The silencer.

[Claim 2] The sand blasting exhaust noise reduction method according to claim 1, wherein the method of controlling the diameter of the exhaust valve is to set the exhaust valve to an adjustable displacement Adjustable exhaust valve.

[Claim 3] The sand emission exhaust noise reduction method according to claim 1, wherein the method of controlling the diameter of the exhaust valve is to set the exhaust valve as a parallel pre-discharge valve And the main exhaust valve, the small flow exhaust valve, the pre-exhaust valve is opened, the main exhaust valve is closed, the large exhaust gas is exhausted, and the main exhaust valve is opened.

[Claim 4] A sand blasting mechanism of a core shooter, comprising a sandblasting head device and an exhausting device, the sanding head device mainly comprising a gas storage bag, an intake pipe, an intake valve, a sand chamber, and a sanding cylinder, the exhausting device is mainly composed of an exhaust net, an exhaust pipe, an exhaust valve and a silencer The air injection chamber has an intake port, an air outlet port, and an exhaust port, and the air inlet port communicates with the air storage bag through the air intake pipe, and the air outlet port is provided with the exhaust air network and is in an operating state Connected to the shotgun, the exhaust port communicates with the muffler through the exhaust pipe, the intake valve is disposed on the intake pipe, and the exhaust valve is disposed on the exhaust pipe The exhaust valve is configured as an adjustable exhaust valve with an adjustable displacement, or the exhaust valve includes a parallel pre-exhaust valve and a main exhaust valve, the pre-exhaust valve It is set as a small-diameter valve, and the main exhaust valve is set as a large-diameter valve.

[Claim 5] The sand blasting mechanism according to claim 4, wherein the pre-exhaust valve has a diameter of DN6 to DN25.

[Claim 6] The sand blasting mechanism according to claim 4, wherein the main exhaust valve has a diameter of DN32 to DN80.