CN211681630U

CN211681630U - Sand source selecting structure of sand blasting gun

Info

Publication number: CN211681630U
Application number: CN201921904341.6U
Authority: CN
Inventors: 陈崑玮
Original assignee: Lematec Co ltd
Current assignee: Lematec Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-10-16
Anticipated expiration: 2029-11-06

Abstract

The utility model provides a sandblast gun sand source optional structure, include: a body; a flow passage is formed on the body and can be used for high-pressure gas to pass through; two longitudinal channels are formed on the body and respectively lead to the flow channel; a sand box disposed on the body and connected to the flow passage through one of the two longitudinal passages; at least one tubular in contact with the sand bank; a first control valve mounted on the body for connecting the sand box to the longitudinal passageway of the runner; and a second control valve is mounted to the body for connecting the flow passage to the other longitudinal passage of the tube. The first control valve and the second control valve are combined into a selection structure, and the selection structure obtains a proper sand grain source, so that the defect of a single sand grain source in the background technology is effectively overcome.

Description

Sand source selecting structure of sand blasting gun

Technical Field

The utility model relates to a selection technique of sand source especially indicates a sand source selection structure of sand blasting gun.

Background

The known sand blasting gun sprays sand grains to the surface of a metal workpiece by means of high-pressure gas to perform surface treatment such as rust removal, dust prevention and the like, so that water molecules or impurities can be prevented from being attached to the surface of the metal, and the metal workpiece can be prevented from being rusted or damaged.

The sand blasting gun has the advantages that the sand blasting gun is large in sand amount for metal workpieces with large volumes; the amount of sand sprayed out from the metal workpiece with small volume is less.

However, the known sand blasting gun has a sand box which receives a fixed amount of sand and cannot increase the amount of sand by itself.

Therefore, how to improve the amount of sand used by the sand blasting gun becomes the problem to be solved by the present invention.

SUMMERY OF THE UTILITY MODEL

The utility model provides a new sand blasting gun, main aim at: by adopting the selection structure, the proper sand grain source is selected according to the volume of the metal workpiece, and the defects of the background technology are effectively overcome.

Because of the achievement of above-mentioned purpose, the utility model provides a sandblast rifle sand source selective structure, a serial communication port, include:

a body;

a flow passage formed in the body for allowing high pressure gas to pass through;

two longitudinal channels formed in the body and each leading to a flow channel;

a sand box disposed on the body and connected to the runner through one of the two longitudinal channels;

at least one tubular in contact with the sand bank;

a first control valve installed on the longitudinal passage of the body for connecting the sand box and the runner; and

a second control valve is mounted on the body for connecting the flow passage to the other longitudinal passage of the pipe member.

The sand source selecting structure of the sand blasting gun is characterized in that the first control valve is provided with a valve rod with a hole, and the hole is communicated with two sides of the valve rod; when the valve rod passes through the body, the axial direction of the hole is parallel to or vertical to the depth direction of the longitudinal channel, and the first control valve determines whether the longitudinal channel is unblocked or not.

The sand source selecting structure of the sand blasting gun is characterized in that the first control valve is also provided with a knob and a pin, the knob and the pin are arranged at two ends of the valve rod, and the pin is matched with a group of blocking parts of the body to limit the reciprocating motion of the valve rod.

The sand source selecting structure of the sand blasting gun is characterized in that a group of O-rings are arranged on two sides of the hole, and each O-ring is in contact with the valve rod and the body to have a sealing effect.

The sand source selecting structure of the sand blasting gun, wherein the second control valve comprises:

a valve stem having a bore communicating with both sides of the valve stem; and

a fitting having an insert portion with an inner diameter, the insert portion engaging the tubular member to connect the tubular member and the longitudinal passageway with the inner diameter;

when the connector is sleeved on a convex part of the body, the valve rod passes through the connected convex part and the connector, the axial direction of the hole is parallel to or vertical to the depth direction of the longitudinal channel, and the second control valve determines whether the longitudinal channel is unblocked or not.

The sand source selecting structure of the sand blasting gun is characterized in that the second control valve is also provided with a knob and a pin, the knob and the pin are arranged at two ends of the valve rod, and the pin is matched with a group of blocking parts of the joint to limit the reciprocating motion of the valve rod.

The sand source selecting structure of the sand blasting gun is characterized in that a group of O-rings are arranged on two sides of the hole, and each O-ring is in contact with the valve rod and the convex part to achieve a sealing effect.

Therefore, the utility model discloses a first control valve cooperation second control valve constitutes an optional structure, looks metal work's bulk size, selects suitable sand grain source, effectively solves the drawback in the single sand source of prior art.

To further clarify the objects, features and advantages of the present invention, one or more preferred embodiments will be described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a plan view of a preferred embodiment of an alternative construction configured for use with a sand blast gun.

Fig. 2 is a plan view of another angle of the selected structure.

Fig. 3 is a sectional view taken along line a-a of fig. 1.

FIG. 4 is an action diagram of selecting a sand source.

Description of reference numerals: a sand blasting gun 10; a body 11; an assembly hole 111; a longitudinal channel 112; the

stoppers

53, 113; a convex portion 114; a flow channel 12; an inlet 13; an air tube 14; an outlet 15; a nozzle 16; a trigger 17; a pneumatic valve 18; a gas flow direction 19; a sand box 20; a cover 21; sand grains 22;

arrows

221, 251; a hose 23; a rigid tube 24; a sand heap 25; a selection structure 30; the first control valve 31;

knobs

32, 41; the

valve stems

33, 42;

pins

34, 43;

holes

35, 44; o-

rings

36, 45; a second control valve 40; a joint 50; an insertion portion 51; an inner diameter 52.

Detailed Description

Fig. 1 is a plan view illustrating a sand blast gun 10 having a body 11 with a gun-shaped profile, the body 11 defining a flow passage 12 therein. The flow channel 12 has an inlet 13 and an outlet 15, said inlet 13 and a high-pressure gas device, such as an air compressor, being connected together by an air line 14. A nozzle 16 is removably associated with the body 11, the nozzle 16 communicating with the outlet 15 of the flow passage 12.

A pneumatic valve 18 is provided in the body 11 to block the flow passage 12. A trigger 17 is connected to the body 11 for oscillation, the trigger 17 actuating a pneumatic valve 18 to open the inlet 13 and outlet 15 of the flow passage 12 so that pressurized gas from the gas line 14 enters the flow passage 12 and is directed by the nozzle 16 to exit the body 11 in a gas flow direction 19.

In the figure, a sand magazine 20 is secured to the body 11 for receiving a quantity of sand 22. A cover 21 locks the sand magazine 20 and prevents the sand particles 22 from leaving the sand magazine 20.

In addition, a selection structure 30 is composed of a first control valve 31 and a second control valve 40, the first and

second control valves

31, 40 being mounted on the body 11 adjacent to the nozzle 16.

The plan view of fig. 2, in combination with the sectional view of fig. 3, details the coupling relationship of the body 11 and the first control valve 31. First, two longitudinal passages 112 are formed inside the body 11, and these longitudinal passages 112 are connected to the flow passages 12 of the body 11, respectively. Next, the first control valve 31 has a stem 33, the stem 33 having a knob 32 and a hole 35, the knob 32 being formed at one end of the stem 33, the hole 35 being communicated with both sides of the stem 33.

When the other end of the valve rod 33 passes through an assembling hole 111 of the body 11, a pin 34 is inserted into a part of the valve rod 33 exposed out of the body 11, which can prevent the valve rod 33 from leaving the body 11, and can not influence the knob 32 to drive the valve rod 33 to rotate relative to the body 11. In addition, a set of O-rings 36 is embedded in the surface of the valve stem 33, and the set of O-rings 36 is on both sides of the hole 35 and contacts the wall of the body 11 surrounding the assembly hole 111, thereby generating a sealing effect for preventing pressure leakage.

In this embodiment, the body 11 protrudes with a set of stops 113, and the set of stops 113 on both sides of the valve rod 33 block the pin 34 to limit the reciprocating motion of the valve rod 33 between a longitudinal position and a transverse position.

In the longitudinal position, the axial direction of the hole 35 is substantially parallel to the depth direction of the longitudinal channel 112, so that the longitudinal channel 112 is open. In this manner, the high pressure gas in the flow passage 12 creates suction in the longitudinal passage 112. Since the inside of the sand box 20 communicates with the longitudinal passage 112, the sand grains of the sand box 20 flow into the longitudinal passage 112 in the direction of the arrow 221, and the mixed high-pressure gas is ejected together through the flow passage 12 to the outside of the body 11.

As shown in fig. 4, in the lateral position, the axial direction of the hole 35 is substantially perpendicular to the depth direction of the longitudinal passage 112, so that the longitudinal passage 112 is interrupted by the surface of the stem 33. Therefore, the high-pressure gas of the flow path 12 cannot exert a force on the sand box 20, and the sand of the sand box 20 does not naturally enter the flow path 12.

In other words, the first control valve 31 determines whether sand of the sand magazine 20 enters the flow channel 12 or not.

Referring next to fig. 2 and 4, the coupling relationship between the body 11 and the second control valve 40 will be described in detail. First, the body 11 has a protrusion 114, the protrusion 114 and the sand box 20 are on both sides of the body 11, and another longitudinal channel 112 penetrates the inside of the protrusion 114. The second control valve 40 is composed of another stem 42 and a joint 50, and the stem 42 has a structure substantially similar to that of the stem 33, and also includes a knob 41, a hole 44, and an O-ring 45. The joint 50 has an insertion portion 51 formed by bulging, and the insertion portion 51 is a circular tube and has an inner diameter 52.

When the connector 50 is sleeved outside the convex part 114, the valve rod 42 passes through the connected convex part 114 and the connector 50, and the other pin 43 is inserted into the position of the valve rod 42 exposed out of the connector 50, so that the connector 50 can be prevented from leaving the convex part 114, and the knob 41 is not influenced to drive the valve rod 42 to rotate relative to the connector 50. In addition, a set of stops 53 are raised on the exterior of the fitting 50 and cooperating pins 43 limit the valve stem 42 to move back and forth in both the longitudinal and transverse positions. Of course, the set of O-rings 45 contact the protrusion 114 (or the fitting 50) and also provide a sealing effect against pressure relief.

A nozzle of a hose 23 is fitted over the insertion portion 51, and the inner diameter 52 of the insertion portion 51 communicates with the hose 23. The other mouth of the hose 23 incorporates a rigid tube 24 which is inserted into a sand bank 25 (see figure 1).

In the longitudinal position, the axial direction of the hole 44 is also parallel to the depth direction of the longitudinal channel 112, so that the longitudinal channel 112 is open. The high pressure gas in the flow channel 12 generates suction force to the sand pile 25 (see fig. 1) through the hose 23 and the hard pipe 24, so that the high pressure gas mixed into the flow channel 12 along the arrow 251 is ejected out of the body 11 together with the sand grains.

As shown in fig. 3, in the transverse position, the axial direction of the bore 44 is substantially perpendicular to the depth direction of the longitudinal passage 112, such that the longitudinal passage 112 is interrupted by the surface of the valve stem 42 (see fig. 4). The high pressure gas is blocked by the valve stem 42 and no longer exerts a force on the sand heap 25 (see fig. 1), and sand particles naturally do not enter the channel 12 via the hose 23.

Briefly, the second control valve 40 is a controller that determines the high pressure gas in the flow passage 12 to extract sand particles by contacting the hose 23 with a piece of the hard tubing 24 to a sand pile 25 (see fig. 1).

Although, the first control valve 31 and the second control valve 40 are independent and open and close respectively. However, it is within the scope of the present invention to open or close the first and

second control valves

31, 40 simultaneously.

Claims

1. A sand source selecting structure of a sand blast gun, comprising:

a body (11);

a flow channel (12) formed in the body (11) and through which high-pressure gas can pass;

two longitudinal channels (112) formed in the body (11) and each leading to a flow channel (12);

a sand box (20) arranged in the body (11) and connected to the flow channel (12) by one of the two longitudinal channels (112);

at least one tubular contacting the sand bank (25);

a first control valve (31) mounted on the body (11) for connecting the sand box (20) to the longitudinal passage (112) of the runner (12); and

a second control valve (40) is mounted on the body (11) for connecting the flow passage (12) to the other longitudinal passage (112) of the pipe.

2. The sand supply selecting structure of a sand blast gun according to claim 1, wherein the first control valve (31) has a valve stem (33) having an orifice (35), the orifice (35) communicating with both sides of the valve stem (33); when the valve rod (33) passes through the body (11), the axial direction of the hole (35) is parallel to or vertical to the depth direction of the longitudinal channel (112), and the first control valve (31) determines whether the longitudinal channel (112) is unblocked or not.

3. The sand blast gun sand source selection structure according to claim 2, wherein the first control valve (31) further comprises a knob (32) and a pin (34), the knob (32) and the pin (34) being at both ends of the valve stem (33), the pin (34) engaging a set of stops (113) of the body (11) to limit the reciprocating movement of the valve stem (33).

4. The sand blast gun sand source selection structure according to claim 2, wherein a set of O-rings (36) are arranged on both sides of the hole (35), each O-ring (36) contacting the valve stem (33) and the body (11) with a sealing effect.

5. The sand blast gun sand source selection structure according to claim 1, wherein the second control valve (40) comprises:

a valve stem (42) having an aperture (44), the aperture (44) communicating with both sides of the valve stem (42); and

a coupling (50) having an insert portion (51) with an inner diameter (52) and being bulged, the insert portion (51) engaging the pipe element to connect the pipe element with the longitudinal passage (112) at the inner diameter (52);

when the connector (50) is sleeved on a convex part (114) of the body (11), the valve rod (42) passes through the connected convex part (114) and the connector (50), the axial direction of the hole (44) is parallel to or vertical to the depth direction of the longitudinal channel (112), and the second control valve (40) determines whether the longitudinal channel (112) is unblocked or not.

6. The sand blast gun sand source selection structure according to claim 5, wherein the second control valve (40) further comprises a knob (41) and a pin (43), the knob (41) and the pin (43) being at both ends of the valve stem (42), the pin (43) cooperating with a set of stops (53) of the joint (50) to limit the reciprocating movement of the valve stem (42).

7. The sand blast gun sand source selection structure according to claim 5, wherein a set of O-rings (45) are arranged on both sides of the hole (44), each O-ring (45) contacting the valve stem (42) and the boss (114) to provide a sealing effect.