CN107791159B

CN107791159B - Sand distributor and sand blasting machine

Info

Publication number: CN107791159B
Application number: CN201711202051.2A
Authority: CN
Inventors: 沈俊
Original assignee: Wuxi Fodoo Precision Industry Co ltd
Current assignee: Wuxi Fodoo Precision Industry Co ltd
Priority date: 2017-11-27
Filing date: 2017-11-27
Publication date: 2023-07-11
Anticipated expiration: 2037-11-27
Also published as: CN107791159A

Abstract

The invention provides a sand distributor and a sand blasting machine, wherein the sand distributor comprises: the valve body, at least two sand material rooms, each sand material is indoor to be provided with at least one sandblast unit, the sandblast unit includes: the sand sucking interface, the first adjusting device and the needle valve, wherein the first adjusting device is used for adjusting the position of the needle valve on the axis of the needle valve, the head of the first adjusting device is positioned at the inlet of the sand sucking interface, the head of the first adjusting device is conical, an annular gap is formed between the head of the first adjusting device and the sand sucking interface, and an air flow channel is arranged in the needle valve and used for sending air outside the sand material chamber into the through hole. According to the sand distributor and the sand blasting machine provided by the invention, the sand chambers are mutually independent and are not influenced, so that the distribution and accumulation conditions of the sand feed inlets are optimized; the sectional area of the feed inlet is changed by adjusting the position of the needle valve; the needle valve supplements gas to adjust the negative pressure difference of the feed inlet, and the operation is convenient.

Description

Sand distributor and sand blasting machine

Technical Field

The invention relates to the technical field of abrasive spraying equipment, in particular to a sand distributor and a sand blasting machine.

Background

Siphon sand blasting and shot blasting are common surface treatment processes, and the principle is as follows: the compressed air flows at high speed in the spray gun to form negative pressure, so that injection is generated, the abrasive in the storage bin (box) is sucked into the spray gun through the rubber tube, and then is sprayed to the surface of a workpiece at high speed along with the compressed air flow through the nozzle, so that the surface of the workpiece obtains certain cleanliness and different roughness, and the mechanical property of the surface of the workpiece is improved. When a plurality of spray guns work simultaneously, whether the spray gun spray amount is uniform or not is an important index of a spray process, and under the condition of uneven spray amount, the surface treatment of a spray workpiece is extremely easy to cause the problems of insufficient spray treatment coverage rate, insufficient spray effect, excessive spray treatment damage to the surface and the like.

Under the condition of constant sand blasting pressure, the sand blasting amount of the spray gun is directly related to the sand sucking amount, and the sand sucking amount is directly related to the distribution and accumulation condition of the sand in the sand sucking opening, the sectional area of the sand passing through the sand sucking opening, the negative pressure difference of the sand sucking opening and other factors.

In the prior art, the air flow in the sand blasting connecting pipe is controlled by arranging a bypass air compensating valve on the sand blasting connecting pipe, so that the flow speed of sand materials is controlled, however, the uniform suction of the sand materials cannot be completely ensured.

In the prior art, when a plurality of spray guns work simultaneously, the sand blasting amount is more difficult to accurately adjust and maintain constant operation.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the sand distributor and the sand blasting machine, which can optimize the distribution and accumulation conditions of sand in the sand suction port, and the sectional area of the sand passing through the sand suction port is adjustable and the negative pressure difference of the sand suction port is adjustable; especially when the multi-gun sand blasting works simultaneously, the sand blasting amount can be accurately regulated and the constant operation can be maintained.

In order to solve the technical problems, the invention provides a sand dispenser, comprising: the valve body, the valve body is located and stores up sand storehouse below, is provided with two at least sand material rooms on it, every sand material room all with store up sand storehouse intercommunication, every sand material is indoor to be provided with at least one sandblast unit, the sandblast unit includes: the sand sucking port is fixed on the valve body, a through hole communicated with the sand chamber is formed in the sand sucking port, the outlet end of the through hole is connected with the sand blasting gun through a pipeline, the needle valve is installed on the valve body through the first adjusting device, the first adjusting device is used for adjusting the position of the needle valve on the axis of the needle valve, the needle valve and the through hole are coaxially arranged, the head of the needle valve is located at the inlet of the through hole, the head of the needle valve is conical, an annular gap is formed between the needle valve and the through hole, and an air flow channel is formed in the needle valve and used for conveying air outside the sand chamber into the through hole.

Further, two sand chambers are arranged on the valve body, the shape of each sand chamber is rectangular, the two sand chambers are symmetrical with respect to the center of the valve body, and two sand blasting units are uniformly distributed in the length direction of each sand chamber.

Further, the upper end of the sand chamber is provided with a chamfer.

Further, the sand feeding device also comprises a hopper which is conical in shape and is fixed below the valve body, an inner cavity of the hopper is communicated with the sand chamber, and a discharging switch is arranged at the lower end of the hopper.

Further, the sand storage device also comprises a flange plate which is arranged between the sand storage bin and the valve body and used for connecting the sand storage bin and the valve body.

Further, the first adjusting device comprises a fixing seat and a bolt, the fixing seat is fixed on the valve body, the needle valve is sleeved in a mounting hole on the fixing seat, and the bolt is arranged on the fixing seat and used for fixing the position of the needle valve.

Further, a second adjusting device is arranged on the needle valve and used for adjusting the size of the air inlet on the air flow channel.

A sand blasting machine comprises the sand distributor.

According to the sand distributor and the sand blasting machine provided by the invention, the sand chambers are mutually independent and are not influenced, so that the distribution and accumulation conditions of the sand feed inlets are optimized; the sectional area of the feed inlet is changed by adjusting the position of the needle valve, so that the operation is convenient and the stability can be kept; the needle valve supplements gas to adjust the negative pressure difference of the feed inlet, and the operation is convenient. The uniform suction of sand is realized by optimizing the distribution and accumulation condition of the sand suction ports, adjusting the sectional area of the sand suction ports and the negative pressure difference.

Drawings

FIG. 1 is a front view of a sand dispenser of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a cross-sectional view of C-C of FIG. 3;

FIG. 5 is an alternative embodiment of the arrangement of the sand magazine of the present invention;

fig. 6 is a second alternative embodiment of the arrangement of the sand magazine of the present invention.

In the figure, the flange plate 1, the valve body 2, the valve body 201, the sand material chamber 3, the hopper 301, the discharge switch 4, the sand blasting unit 401, the sand suction interface 401a, the through hole 402, the needle valve 403, the fixing seat 403a, the threaded hole 404 and the air adjusting valve.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.

A sand dispenser, as shown in figures 1-4, comprising: the valve body 2, the valve body 2 is located below a sand storage bin (not shown), at least two sand chambers 201 are arranged on the valve body, each sand chamber 201 is communicated with the sand storage bin, and at least one sand blasting unit 4 is arranged in each sand chamber 201. The sand in the sand storage bin sinks into the sand chamber 201 of the valve body 2 under the action of gravity, and the sand is inevitably and rapidly piled up in the whole sand chamber 201 because the capacity of the sand chamber 201 is small. At least two sand chambers 201, which are independent of each other and do not affect each other, optimize the distribution and accumulation conditions of the sand feed inlets.

The arrangement mode of the sand chambers 201 on the valve body 2 may be as shown in fig. 5 and 6, in fig. 5, the five sand chambers 201 are independent from each other, and are symmetrically distributed in the center of the valve body 2, and considering that the sand blasting units 4 interfere with each other, the depth of the sand chambers 201 may be increased, so that the five sand blasting units 4 are arranged in a staggered manner in the vertical direction, so as to avoid interference. In fig. 6, five sand chambers 201 are located on the same straight line, and are circular in shape, one sand blasting unit 4 is arranged in each sand chamber 201, and the five sand blasting units 4 are distributed equidistantly and located in the same plane. Although the length of the valve body 2 is increased, the thickness of the valve body 2 is reduced.

In this embodiment, as shown in fig. 3, the arrangement mode of the sand chambers 201 on the valve body 2 is that two sand chambers 201 are provided on the valve body 2, the sand chambers 201 are rectangular, the two sand chambers 201 are symmetrical with respect to the center of the valve body 2, and each sand chamber 201 is uniformly provided with two sand blasting units 4 along the length direction thereof. The sand blasting units 4 are arranged in the same plane, so that the thickness of the valve body 2 is reduced, and meanwhile, two sand chambers 201 which are arranged in a staggered mode are arranged, so that mutual interference of the sand chambers is avoided. In addition, the blasting units 4 are uniformly distributed in the length direction of the blasting chamber 201, and interference between the blasting units 4 is reduced. The air inlet direction of the sand blasting unit 4 in the two sand chambers 201 is opposite. Interference is reduced.

As shown in fig. 4, the blasting unit 4 includes: the sand sucking interface 41, the needle valve 402, the first adjusting device and the air adjusting valve 404, the sand sucking interface 401 is fixed on the valve body 2, a through hole 401a communicated with the sand chamber 201 is arranged on the sand sucking interface, and the outlet end of the through hole 401a is connected with the sand blasting gun through a pipeline. The needle valve 402 is rod-shaped, is coaxially arranged with the through hole 401a, and has a head portion positioned at the inlet of the through hole 401a and forms an annular gap with the through hole. The compressed air in the blasting gun forms negative pressure in the pipeline, and sand in the sand chamber 201 enters the through hole 401a through the annular gap and is sent to the blasting gun through the pipeline.

The needle valve 402 is mounted on the valve body 2 by a first adjusting means for adjusting the position of the needle valve 402 on its axis to realize the advance or retreat of the needle valve 402 toward the through hole 401a on its axis. The head of the needle valve 402 is tapered and forms an annular gap with the through hole 401a, and the cross-sectional area of the annular gap is changed with the change of the insertion depth of the needle valve 402. An air flow passage is provided inside the needle valve 402 for sending air outside the sand chamber 201 into the through hole 401a therethrough. The gas is supplied into the through hole 401a to adjust the pressure difference in the annular gap, thereby changing the sand intake amount. As shown in fig. 4, the outlet of the air flow channel is arranged at the axial position of the inlet of the through hole 401a, so that the pressure difference is changed quickly and effectively, and the pressure change is more uniform. The outlet of the airflow channel can be in various structural forms, such as a single outlet or a plurality of outlets, the single outlet has high air inlet speed, and the plurality of outlets ensure more stable air inlet and small disturbance to the surrounding.

As shown in fig. 4, in an alternative implementation manner of this embodiment, the first adjusting device includes a fixing seat 403 and a bolt, the fixing seat 403 is fixed on the valve body 2, and the needle valve 402 is sleeved in a mounting hole on the fixing seat 403 and can move back and forth in the mounting hole. The fixing seat 403 is provided with an internal threaded hole which is communicated with the mounting hole, and a matched bolt is arranged on the internal threaded hole, and when the position of the needle valve 402 is adjusted, the bolt is screwed down to fix the position of the needle valve 402. The main body of the needle valve 402 may be connected to the valve body 2 by a screw structure, and the axial position thereof may be moved by rotation, however, since the tail end thereof is connected to the air pipe, the rotation operation is inconvenient, and the fixing seat 403 and the bolt may be provided to avoid the inconvenience of operation.

In an alternative implementation of this embodiment, the tail end of the needle valve 402 is connected to a gas source through a gas regulating valve 404, and the gas regulating valve 404 is used to regulate the size of the gas inlet of the gas flow channel.

In an alternative implementation of this embodiment, the upper end of the sand chamber 201 is provided with a chamfer. Facilitating sand in the sand storage bin to enter the sand chamber 201.

In an alternative implementation manner of this embodiment, a hopper 3 is connected to the lower part of the valve body 2, the shape of the hopper is conical, the inner cavity of the hopper 3 is communicated with the sand chamber 201, and a discharge switch 301 is arranged at the lower end of the hopper. When the sand feeding device is used, the discharge switch 301 is kept closed, and when sand needs to be replaced, the discharge switch 301 is opened, and the sand is convenient to flow out due to the design of the conical structure.

In an alternative implementation of this embodiment, the flange plate 1 is further included, and is disposed between the Chu Sha cartridge and the valve body 2, for connecting the two. Holes with the same cross section of the sand chamber 201 are formed in the flange plate 1, and chamfers are arranged on the holes, so that sand in the sand storage bin can flow into the sand chamber 201 conveniently.

In an alternative implementation of this embodiment, the through hole 401a is tapered, and the cross-sectional area of the air inlet end is larger than the cross-sectional area of the air outlet end.

A sand blasting machine comprises the sand distributor.

The scope of the invention is not limited in this respect. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.

Claims

1. A sand dispenser, comprising: the valve body, the valve body is located and stores up sand storehouse below, is provided with two at least sand material rooms on it, every sand material room all with store up sand storehouse intercommunication, every sand material is indoor to be provided with at least one sandblast unit, the sandblast unit includes: the sand sucking port is fixed on the valve body, a through hole communicated with the sand chamber is formed in the sand sucking port, the outlet end of the through hole is connected with the sand blasting gun through a pipeline, the needle valve is installed on the valve body through the first adjusting device, the first adjusting device is used for adjusting the position of the needle valve on the axis of the needle valve, the needle valve and the through hole are coaxially arranged, the head of the needle valve is located at the inlet of the through hole, the head of the needle valve is conical, an annular gap is formed between the needle valve and the through hole, and an air flow channel is formed in the needle valve and used for conveying air outside the sand chamber into the through hole.

2. The sand distributor according to claim 1, wherein two sand chambers are arranged on the valve body, the sand chambers are rectangular in shape, the two sand chambers are symmetrical about the center of the valve body, and each sand chamber is uniformly provided with two sand blasting units in the length direction.

3. The sand dispenser of claim 2 wherein the sand chamber upper end is provided with a chamfer.

4. The sand dispenser of claim 1 further comprising a hopper having a conical shape and secured to the underside of the valve body, the interior of the hopper communicating with the sand chamber and the lower end of the hopper being provided with a discharge switch.

5. The sand dispenser of claim 4 further comprising a flange plate disposed between said sand storage bin and said valve body for connecting the two.

6. The sand dispenser of any one of claims 1 to 5 wherein the first adjustment means comprises a fixed seat and a bolt, the fixed seat being secured to the valve body, the needle valve being received in a mounting hole in the fixed seat, the bolt being disposed on the fixed seat for securing the position of the needle valve.

7. A sand dispenser according to any one of claims 1 to 5 wherein the needle valve is provided with second adjustment means for adjusting the size of the air inlet opening in the air flow passage.

8. A blasting machine comprising a sand dispenser according to any one of claims 1 to 7.