Blowing and sucking pipe for cleaning casting sand mold

Abstract

A blowing and sucking pipe for casting sand mold cleaning belongs to the field of casting sand mold cleaning tools and comprises a main air pipe, a flow guide seat and an air pipe sleeve, the main air pipe is provided with a smooth wind flow channel, the air pipe sleeve is provided with a ring sleeve area and a guide area and is coaxially connected to the main air pipe, and the ring sleeve area and the main air pipe form an annular space. The guiding area continuously extends a wind power flowing channel of the main air pipe, the lower end of the annular space is sealed for wind isolation, the upper end of the annular space is provided with an annular gap communicated with the guiding area, an air inlet hole is formed in the air pipe sleeve in the annular sleeve area, an air inlet is formed in the main air pipe, and the flow guiding base is composed of a basic ring body and a control partition plate and embedded in the annular space in a matched mode. The control partition plate is provided with a blocking part II and a guide part I, and an air guide groove is formed in the guide part I. Function conversion can be conducted on the blowing and sucking pipe structure through conversion of the flow guide base, two cleaning working modes of blowing and sucking can be achieved through a single high-pressure fan, equipment occupation can be reduced in production, the technological method is simplified, and the cleaning effect and the working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to a foundry sand mold cleaning tool, in particular to a blowing and suction pipe for cleaning the foundry sand mold. Background Art

[0002] As is known to all, in the production and preparation process of casting sand molds, sand and other foreign matter will inevitably be scattered and residual in the sand mold cavity. If these residual sand or foreign matter are not removed from the mold cavity in time, they will remain in the casting after casting, which will cause sand holes, slag inclusions and other structural defects in the casting, and have a greater adverse effect on the mechanical properties of the casting. In the current production, the sand and other foreign matter in the sand mold cavity are removed by a single-tube connected high-pressure blower for blowing. The processing operation is simple and the cleaning efficiency is high. However, this cleaning method is obviously unable to remove the residual sand and foreign matter in the narrow cavity and semi-enclosed blind hole cavity on the sand mold. For example, in the semi-enclosed cavity such as the easy-to-cut insulation riser, the sand or foreign matter under the action of the high-pressure wind will only form a circulating motion state in the riser, and cannot escape from the riser area. In actual production, it is usually necessary to use an industrial vacuum cleaner to clean these narrow cavities and semi-enclosed blind holes on the sand mold. This operation mode of distributed cleaning for different cavity structures on the sand mold requires the equipment and the use of two tools and equipment, which not only increases the equipment investment cost and increases the production space occupation, but also requires workers to constantly change the operating tools during the operation process, which obviously increases the complexity and difficulty of the cleaning operation, significantly increases the labor intensity, and reduces production efficiency. Therefore, it is necessary to study and improve the cleaning tools for sand mold cavities in casting production, reduce the equipment occupation of the casting sand mold cavity cleaning process, simplify the sand mold cavity cleaning process, and improve the work efficiency of sand mold cavity cleaning. Utility Model Content

[0003] The purpose of the utility model is to provide a blowing and suction pipe for cleaning casting sand molds, which can realize the functional conversion of the blowing and suction pipe between two cleaning modes of blowing and suction by adjusting the structural state of the blowing and suction pipe itself, thereby improving the cleaning effect and cleaning efficiency of the sand mold cavity.

[0004] A blowing and suction pipe for cleaning foundry sand molds, comprising: a main air duct, a guide seat and an air duct sleeve; the main air duct is a circular tube body with upper and lower ends penetrating therethrough, and has a smooth wind flow channel; the air duct sleeve is coaxially sleeved and connected to the upper end of the main air duct, and has an annular sleeve area overlapping with the main air duct and a guide area extending beyond the upper end of the main air duct; an annular space is formed between the air duct sleeve and the main air duct in the annular sleeve area; the aperture of the guide area is smaller than the aperture of the annular sleeve area, so that the aperture of the guide area corresponds to the aperture of the main air duct and is continuous. The wind flow channel of the main air duct is extended, the lower end of the annular space is kept closed and windproof, and the upper end has an annular gap connected with the guide area, forming a guide channel for the flowing air to flow from the annular space to the guide area. In the annular area, an air inlet is provided on the air duct sleeve to connect an external high-pressure fan to introduce high-pressure air into the annular space. An air inlet is opened on the main air duct 1, and the air inlet is arranged on the circumferential surface of the lower part of the air inlet; the guide seat is an annular structure, which is composed of a basic ring body and a control partition, and is equipped with The air guide seat is provided with a plurality of air inlets, each of which is provided with a plurality of air inlets, each of which is provided with a plurality of air inlets, each of which is provided with a plurality of air inlets. The air inlets are provided with a plurality of air inlets, each of which is provided with a plurality of air inlets. The air inlets are provided with a plurality of air inlets, each of which is provided with a plurality of air inlets. The air inlets are provided with a plurality of air inlets, each of which is provided with a plurality of air inlets. The annular gap at the end is connected with the wind flow channel of the air duct sleeve; when the guide part I of the control baffle corresponds to the position of the air inlet hole in the radial direction, the air guide groove opened on the guide part I corresponds to the air inlet hole and the air inlet, and at the same time seals the connecting channel between the air inlet hole and the annular space; when the blocking part II of the control baffle corresponds to the position of the air inlet hole in the radial direction, the blocking part II covers and closes the air inlet hole as a whole, so that the air inlet hole cannot be connected with the wind flow channel of the blowing and suction pipe for cleaning the casting sand mold.

[0005] The blowing and suction pipe for cleaning casting sand molds preferably has an upper air induction area on the air duct sleeve 3, and the upper air induction area is a conical cylinder, which is arranged between the annular sleeve area and the guide area. The inner conical surface of the conical cylinder corresponds to the annular gap connecting the annular space and the guide area, and can guide the high-pressure air to flow smoothly from the annular space to the wind flow channel of the guide area.

[0006] The blowing and suction pipe for cleaning casting sand molds preferably has a lower air induction area on the air duct sleeve, and the lower air induction area is an inverted conical cylinder, which is arranged at the lower end of the annular sleeve area, and the inner conical surface of the inverted conical cylinder corresponds to the air inlet opened on the main air duct, and can guide the high-pressure air blown into the main air duct from the air inlet, so that the high-pressure air flows to the lower end in the wind flow channel of the main air duct.

[0007] In the blowing and suction pipe for cleaning casting sand molds, the air inlets are preferably evenly distributed on the cross-sectional circumference of the main air duct.

[0008] The blowing and suction pipe for cleaning casting sand molds also includes: a hose and a pull wire. The hose is connected and installed on the lower end of the main air duct, and the wind flow channel of the main air duct is continuously extended from the lower end. One end of the pull wire is connected to the lower port of the hose. Pulling the pull wire can bend the hose, thereby adjusting and changing the diversion direction of the wind flow channel of the main air duct.

[0009] The beneficial effect of the utility model is that it provides a blowing and suction pipe for cleaning foundry sand molds, utilizes the conversion effect of the guide seat to transform the function of the blowing and suction pipe's own structure, and realizes the operation of two convertible blowing and suction cleaning working modes for the foundry sand mold under the condition of only using a single high-pressure fan. During use, there is no need to temporarily add or replace other equipment, which solves the technical problem of the need to use an industrial vacuum cleaner specifically for cleaning narrow cavities and semi-enclosed blind holes in the sand mold in the prior art. It can effectively reduce the number of equipment occupied in the foundry sand mold cleaning process, simplify the process method for cleaning the sand mold cavity, and improve the work efficiency of cleaning the sand mold cavity. It is also beneficial to reduce production cost investment, save production space occupation, and reduce the labor intensity of workers when applied to actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the structural diagram of the blowing working state of the blowing and suction pipe used for cleaning the casting sand mold.

[0011] Figure 2 for Figure 1 Sectional view of the AA section.

[0012] Figure 3 This is the structural diagram of the working state of the blowing and suction pipe for cleaning the casting sand mold.

[0013] Figure 4 for Figure 3 Cross-sectional view of the middle BB section.

[0014] Figure 5 This is a structural diagram of the blowing and suction pipe for cleaning casting sand molds when it stops working.

[0015] Figure 6 for Figure 5 Cross-sectional view of the middle CC section.

[0016] Figure 7 This is a three-dimensional structural diagram of the guide seat.

[0017] Among them: 1 is the main air duct, 2 is the guide seat, 2a is the basic ring body, 2b is the control partition, 3 is the air duct sleeve, 3a is the guide area, 3b is the upper air induction area, 3c is the ring sleeve area, 3d is the lower air induction area, 4 is the hose, 5 is the pull wire, 6 is the air inlet, 7 is the air inlet, 8 is the air guide groove, 9 is the toggle switch, and 10 is the annular space. Specific embodiments

[0018] Furthermore, the technical solution for which protection is sought in the present utility model is described in detail in conjunction with specific embodiments and the accompanying drawings.

[0019] A blowing and suction pipe for cleaning a foundry sand mold, such as Figures 1 to 6 As shown, it is composed of a main air duct 1, a guide seat 2, an air duct sleeve 3 and a hose 4, wherein the main air duct 1 is a cylindrical tube, the air duct sleeve 3 is coaxially sleeved on the upper end of the main air duct 1, and the hose 4 is connected to the lower end of the main air duct 1; the air duct sleeve 3 is provided with a guide area 3a, an upper air induction area 3b, an annular area 3c and a lower air induction area 3d from top to bottom, the upper air induction area 3b, the annular area 3c and the lower air induction area 3d overlap with the main air duct 1, and form an annular space 10 between the main air duct 1, the upper air induction area 3b is a conical cylinder, the lower air induction area 3d is an inverted conical cylinder, and the guide area 3a extends to the upper end of the main air duct 1 In addition, there is an annular gap between the guide area 3a and the main air duct 1, which makes the guide area 3a and the annular space 10 communicate with each other. The setting position of the annular gap corresponds to the inner conical surface on the upper air induction area 3b. In the annular sleeve area, the air duct sleeve 3 is provided with an air inlet 6, and the main air duct 1 is provided with 8 air inlets 7 evenly distributed along the circumference of the cross section. The air inlet 7 is arranged at the lower part of the air inlet 6, and the opening position corresponds to the inner conical surface on the lower air induction area 3d; the guide seat 2 is composed of a basic ring body 2a and an arc-shaped control partition 2b arranged at the upper end of the basic ring body 2a, which is cooperated and embedded in the annular space 10, such as Figure 7As shown, the control partition 2b has a blocking part II and a guiding part I on its plate surface, the blocking part II is a fully enclosed plate surface, and an air guide groove 8 is provided on the guiding part I, the air guide groove 8 is a cut-off groove with a closed upper end and an open lower end and passing through the basic ring body 2a, and at the same time, a toggle switch 9 is also provided on the basic ring body 2a, the toggle switch 9 cooperates to extend outside the cylinder of the main air duct 1, and controlling the toggle switch 9 to switch the guide seat 2 between three working positions, wherein: working position 1 is the position of the guiding part I corresponding to the air inlet 6, as shown in FIG. Figure 2 As shown, the working position 2 is the position where the blocking part II corresponds to the air inlet 6. Figure 6 As shown, the working position 3 is a position corresponding to the air inlet 6 in the matching area III outside the control partition 2b. Figure 4 As shown; the hose 4 is connected and installed on the lower end of the main air duct 1, and the hose 4 is combined with the main air duct 1 and the guide area on the air duct sleeve 3 to form a continuous and smooth wind flow channel. A pull wire 5 is connected to the lower end of the hose 4, and the other end of the pull wire 5 is fixed on the pipe wall of the main air duct 1. Pulling the pull wire 5 can make the hose 4 bend.

[0020] The method for using the blowing and suction pipe for cleaning the foundry sand mold described in this embodiment and its working principle are as follows: when blowing is required, turn the toggle switch 9 to place the guide seat 2 in the working position 1. At this time, Figure 1 and Figure 2 As shown, the guide portion I on the guide seat 2 corresponds to covering the air inlet 6 opened on the air duct sleeve 3, so that the air inlet 6 is connected with the air guide groove 8 opened on the guide seat 2, and the air guide groove 8 is connected with the wind flow channel in the main air duct 1 through the air inlet 7 opened on the main air duct 1. When the external high-pressure fan is started to introduce high-pressure air into the air inlet 6, the high-pressure airflow will flow through the air guide groove 8, and under the guidance of the inverted cone surface in the lower air induction area 3d, it will be introduced into the main air duct 1 downward from the air inlet 7, and a downward blowing airflow will be generated in the wind flow channel of the main air duct 1, which can blow away and remove sand particles and other foreign matter in the casting sand mold; when suction work is required, the toggle switch 9 is turned to place the guide seat 2 in the working position 3. At this time, as shown in Figure 3 and Figure 4As shown, the air inlet 6 corresponds to the matching area III and is not covered by the control baffle 2b of the guide seat 2, so that the air inlet 6 is directly connected to the annular space 10, and the annular space 10 is connected to the wind flow channel of the guide area 3a of the air duct sleeve 3 through the annular gap at the upper end. When high-pressure air is introduced into the air inlet 6, the high-pressure airflow will flow through the annular area 10, and under the guidance of the conical surface in the upper air induction area 3b, it will be introduced upward from the annular gap to the air flow channel of the guide area 3a of the air duct sleeve 3. In the guide area 3a of the air duct sleeve 3, an upward high-pressure airflow is generated in the wind flow channel of the guide area 3a. Under the action of the high-pressure airflow in the guide area 3a, a Venturi effect is generated in the main air duct 1 to form a negative pressure. An upward suction airflow is then generated in the wind flow channel of the main air duct 1 to suck out the sand particles and other foreign matter in the casting sand mold. When it is necessary to suspend the work, the toggle switch 9 is turned to put the guide seat 2 in the position state of the working position 2. At this time, as shown in FIG. Figure 5 and Figure 6 As shown, the blocking part III on the guide seat 2 corresponds to covering the air inlet 6, closing the air inlet 6 so that it cannot introduce high-pressure air. During production and use, only one high-pressure blower is needed to keep injecting high-pressure air into the air inlet 6. Without using or replacing other equipment throughout the process, the cleaning functions of blowing and sucking can be realized by adjusting the structural state of the blowing and sucking pipe itself. The suction function can be used to directly clean the narrow cavity and the semi-enclosed blind hole, which can significantly improve the cleaning effect and efficiency of the sand mold cavity. At the same time, the flexible hose 4 is installed at the end of the main air duct 1, which is beneficial to reduce the tendency of the blowing and sucking pipe for cleaning the casting sand mold to touch and damage the sand mold during use, and the control of bending the hose 4 can also facilitate the regulation of the wind blowing and suction direction and the wind action area, simplify the operation method, and improve the use efficiency.

Claims

1. A blowing and suction pipe for cleaning a foundry sand mold, characterized in that: include: A main air duct (1), a guide seat (2) and an air duct sleeve (3); the main air duct (1) is a circular tube body with upper and lower ends connected, and has a smooth wind flow channel; the air duct sleeve (3) is coaxially sleeved and connected to the upper end of the main air duct (1), and has an annular sleeve area (3c) overlapping with the main air duct (1) and a guide area (3a) extending to the outside of the upper end of the main air duct (1); an annular space (10) is formed between the air duct sleeve (3) and the main air duct (1) in the annular sleeve area (3c); the aperture of the guide area (3a) is smaller than the aperture of the annular sleeve area (3c), so that the air duct sleeve (3) and the main air duct (1) are connected. The aperture of the guide area (3a) corresponds to the aperture of the main air duct (1) and continuously extends the wind flow channel of the main air duct (1); the lower end of the annular space (10) remains airtight and windproof, and the upper end has an annular gap connected to the guide area (3a); within the annular area (3c), the air duct sleeve (3) is provided with an air inlet (6), and the main air duct (1) is provided with an air inlet (7), and the air inlet (7) is arranged on the circumferential surface below the air inlet (6); the guide seat (2) is an annular structure, which is composed of a basic ring body (2a) and a control partition (2b). , and is mounted in the annular space (10); the basic ring body (2a) is axially limited and positioned between the air inlet (7) and the air inlet hole (6); the plate surface of the control baffle (2b) has a fully enclosed barrier portion II and a guide portion I with an air guide groove (8); the air guide groove (8) is a cut-off groove with an opening at the bottom and arranged axially along the guide seat (2); the cut-off groove passes through the basic ring body (2a); when the control baffle (2b) does not correspond to the position of the air inlet hole (6) in the radial direction, the air inlet hole (6) is connected to the annular space (10), and The annular space (10) is connected to the wind flow channel of the air duct sleeve (3) through the annular gap at the upper end thereof; when the guide portion I of the control baffle (2b) corresponds to the position of the air inlet hole (6) in the radial direction, the air guide groove (8) provided on the guide portion I corresponds to the air inlet hole (6) and the air inlet (7), and at the same time seals the connecting channel between the air inlet hole (6) and the annular space (10); when the blocking portion II of the control baffle (2b) corresponds to the position of the air inlet hole (6) in the radial direction, the blocking portion II entirely covers and seals the air inlet hole (6).

2. A blowing and suction pipe for cleaning a foundry sand mold as claimed in claim 1, characterized in that: The air duct sleeve (3) has an upper air induction area (3b), which is a conical cylinder and is arranged between the annular sleeve area (3c) and the guide area (3a), and the conical surface of the conical cylinder corresponds to the annular gap connecting the annular space (10) and the guide area (3a).

3. A blowing and suction pipe for cleaning a foundry sand mold as claimed in claim 1, characterized in that: The air duct sleeve (3) has a lower air induction area (3d), which is an inverted conical cylinder and is arranged at the lower end of the annular sleeve area (3c), and the inner conical surface of the inverted conical cylinder corresponds to the air inlet (7) opened on the main air duct (1).

4. A blowing and suction pipe for cleaning a foundry sand mold as claimed in any one of claims 1 to 3, characterized in that: The air inlets (7) are evenly distributed on the cross-sectional circumference of the main air duct (1).

5. A blowing and suction pipe for cleaning a foundry sand mold as claimed in claim 4, characterized in that: Also includes: A hose (4) and a pull wire (5), wherein the hose (4) is connected and mounted on the lower end of the main air duct (1) to continuously extend the wind flow channel of the main air duct (1) from the lower end; one end of the pull wire (5) is connected to the lower end of the hose (4); and pulling the pull wire (5) can cause the hose (4) to bend.

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