CN112692239A

CN112692239A - Valve tectorial membrane sand psammitolite

Info

Publication number: CN112692239A
Application number: CN202011497322.3A
Authority: CN
Inventors: 孙东芹
Original assignee: Jiangsu Fangshiyuanlue Technology Consulting Co ltd
Current assignee: Jiangsu Fangshiyuanlue Technology Consulting Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-23

Abstract

The invention belongs to the technical field of casting, and particularly relates to a valve coated sand core. The core comprises an upper core body, a lower core body, an upper core bar and a lower core bar; the upper core includes a first upper core and a second upper core integrally connected; the first upper core part is disc-shaped and horizontally arranged; a second upper core part in a circular truncated cone shape is integrally connected to the lower side of the first upper core part, and the second upper core part is large in upper part and small in lower part; a lower core body in a circular truncated cone shape is arranged on the lower side of the second upper core body, and the upper part of the lower core body is small and the lower part of the lower core body is large; an upper core rod vertically penetrates through the upper core body; a lower core rod vertically penetrates through the lower core body; the upper core bar is detachably connected with the lower core bar. Compared with the prior art, the valve coated sand core provided by the invention has the advantages of reasonable design, reliable structure, convenience in installation, accurate positioning, difficulty in deformation in the casting process, guarantee of the size precision of a casting, and capability of reducing the defects of sand inclusion, rough surface of the product and the like.

Description

Valve tectorial membrane sand psammitolite

Technical Field

The invention belongs to the technical field of casting, and particularly relates to a valve coated sand core.

Background

The valve is a pipeline accessory used for opening and closing a pipeline, controlling the flow direction, regulating and controlling parameters such as pressure, flow and the like of a conveying medium. The valve is required to have the characteristics of high quality, high precision, high sealing performance and the like, and the processing difficulty is large. The production of valve products by casting processes is one of the most common production methods. The metal is smelted into liquid meeting the requirements and poured into a specified valve model, and the valve casting with the preset shape, size and performance can be obtained after cooling, solidification and cleaning treatment. The cast valve has the characteristics of good economy, strong adaptability and the like, and particularly, the economical efficiency of the cast valve can be better embodied for valve parts with complicated shapes, particularly complicated inner cavities.

The valve coated sand core is an important forming part for forming an inner cavity of a valve body in the casting process, and is matched with a sand mold to cast the valve body together. However, we have found that there are still a number of problems with existing sand cores in the production process that are subject to further improvement. For example, the existing sand core has low structural strength, and easily causes the problems of product deformation, product sand inclusion, rough product surface and the like in the casting process; in addition, the existing sand core is not high in positioning accuracy, and certain displacement occurs due to stress in the pouring or forming process, so that the product is unqualified in size.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a valve coated sand core to overcome the defects in the prior art.

In order to achieve the purpose, the invention is realized by the following technical scheme: a valve coated sand core comprises an upper core body, a lower core body, an upper core frame and a lower core frame; the upper core includes a first upper core and a second upper core integrally connected; the first upper core part is disc-shaped and horizontally arranged; a second upper core part in a circular truncated cone shape is integrally connected to the lower side of the first upper core part, and the second upper core part is large in upper part and small in lower part; a lower core body in a circular truncated cone shape is arranged on the lower side of the second upper core body, and the upper part of the lower core body is small and the lower part of the lower core body is large; an upper core rod vertically penetrates through the upper core body; a lower core rod vertically penetrates through the lower core body; the upper core bar is detachably connected with the lower core bar.

According to the valve coated sand core provided by the invention, the rigidity is increased by arranging the upper core bar and the lower core bar, so that the problem of overlarge deformation in the casting process is prevented. Meanwhile, the whole valve coated sand core is divided into an upper part and a lower part, the upper core bone and the lower core bone can be detachably connected, sectional installation is conveniently carried out from different directions, and the valve coated sand core is particularly suitable for operation in a narrow space.

In a further preferred embodiment of the present invention, the lower core is cylindrical, and a positioning portion exposed from the lower core is further provided at the lower end. The core sets up location portion under, guarantees that the installation location is accurate, avoids taking place the displacement midway simultaneously.

In a further preferred embodiment of the present invention, the positioning portion is in a hexagonal frustum shape and integrally connected to the lower core.

The upper core body is cylindrical, and the upper end of the upper core body is also integrally provided with a hanging ring which exposes out of the upper core body, so that the upper core body is convenient to carry and temporarily place.

The invention further prefers that the lower end of the upper core bone is also provided with a first connecting hole; a second connecting hole is also formed in the lower core; the fastening bolt penetrates through the first connecting hole and the second connecting hole, so that the upper core bar and the lower core bar are detachably connected.

The invention further prefers that the upper end of the lower core is also provided with a pair of positioning bulges; the lower end of the upper core rod is also provided with a pair of positioning holes matched with the positioning bulges; the positioning protrusion can be inserted into or separated from the positioning hole, thereby facilitating accurate positioning.

According to a further preferable scheme of the invention, the lower surface of the first upper core part is also provided with a ring-shaped overflow groove; the first upper core part is also internally provided with an air escape hole which is communicated up and down; the air escape hole is communicated with the overflow groove. The gas in the pouring process can be conveniently and fully discharged through the arrangement.

According to a further preferable scheme of the invention, the upper core body and the lower core body are respectively wound with metal wire meshes, so that the integrity and the structural strength of the upper core body and the lower core body are enhanced, and the generation of deformation is inhibited.

The invention further prefers that the exposed surfaces of the upper core body and the lower core body are also coated with a high temperature resistant coating; the thickness of the high-temperature resistant coating layer is 0.2-0.3 mm. The coating of the high-temperature resistant coating layer can prevent sand adhesion and make the surface of the casting smooth. The high temperature resistant coating layer can be epoxy organosilicon high temperature resistant coating, also can be organosilicon high temperature resistant coating, can be resistant to 500 ℃ and above high temperature.

Has the advantages that: compared with the prior art, the valve coated sand core provided by the invention has the advantages of reasonable design, reliable structure, convenience in installation, accurate positioning, difficulty in deformation in the casting process, guarantee of the size precision of a casting, and capability of reducing the defects of sand inclusion, rough surface of the product and the like.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the upper core and the lower core of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a front view of the present invention;

FIG. 5 is a cross-sectional view taken along the plane A-A in FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;

fig. 7 is a cross-sectional view taken along plane C-C of fig. 4.

In the figure, an upper core body 1, a lower core body 2, an upper core frame 3, a lower core frame 4, a first upper core part 11, a second upper core part 12, a hanging ring 31, a first connecting hole 32, a positioning hole 33, a positioning part 41, a second connecting hole 42, a positioning protrusion 43, an overflow groove 111 and an air escape hole 112.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

A valve coated sand core is shown in figures 1 to 4 and comprises an upper core body 1, a lower core body 2, an upper core frame 3 and a lower core frame 4; the upper core body 1 includes a first upper core portion 11 and a second upper core portion 12 integrally connected; the first upper core part 11 is disc-shaped and horizontally arranged; a second upper core part 12 in a circular truncated cone shape is integrally connected to the lower side of the first upper core part 11, and the second upper core part 12 is large in upper part and small in lower part; a lower core body 2 in a circular truncated cone shape is arranged on the lower side of the second upper core body 12, and the lower core body 2 is small in upper part and large in lower part; an upper core rod 3 vertically penetrates through the upper core body 1; a lower core rod 4 vertically penetrates through the lower core body 2; the upper core rod 3 is detachably connected with the lower core rod 4.

In this embodiment, the lower core 4 is cylindrical, and the lower end is further provided with a positioning portion 41 exposed out of the lower core 2.

In this embodiment, the upper core 3 is cylindrical, and the upper end of the upper core is integrally provided with a hanging ring 31 exposing the upper core 1.

In this embodiment, the lower end of the upper core rod 3 is further provided with a first connection hole 32; a second connecting hole 42 is also formed in the lower core rod 4; fastening bolts penetrate through the first connecting holes 32 and the second connecting holes 42, so that the upper core rod 3 and the lower core rod 4 are detachably connected.

In this embodiment, the upper end of the lower core 4 is further provided with a pair of positioning protrusions 43; the lower end of the upper core rod 3 is also provided with a pair of positioning holes 33 matched with the positioning bulges 43; the positioning projection 43 can be inserted into or removed from the positioning hole 33.

In this embodiment, the lower surface of the first upper core portion 11 is further provided with a ring-shaped overflow groove 111; the first upper core part 11 is also internally provided with an air escape hole 112 which is communicated up and down; the air escape hole 112 communicates with the overflow groove 111.

Example 2

In this embodiment, the positioning portion 41 has a hexagonal frustum shape and is integrally connected to the lower core 4.

In this embodiment, wire meshes are wound in the upper core 1 and the lower core 2, as shown in fig. 5 to 7.

In the embodiment, the exposed surfaces of the upper core body 1 and the lower core body 2 are also coated with high-temperature resistant coatings; the thickness of the high-temperature resistant coating layer is within the range of 0.2-0.3 mm.

The above is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that several modifications can be made without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides a valve tectorial membrane sand psammitolite which characterized in that: comprises an upper core body (1), a lower core body (2), an upper core rod (3) and a lower core rod (4); the upper core body (1) comprises a first upper core part (11) and a second upper core part (12) which are integrally connected; the first upper core part (11) is disc-shaped and horizontally arranged; the lower side of the first upper core part (11) is integrally connected with the second upper core part (12) in a circular truncated cone shape, and the second upper core part (12) is large in upper part and small in lower part; the lower side of the second upper core part (12) is provided with the lower core body (2) in a circular truncated cone shape, and the lower core body (2) is small in upper part and large in lower part; the upper core (3) is vertically arranged in the upper core (1) in a penetrating way; the lower core (4) is vertically arranged in the lower core (2) in a penetrating way; the upper core rod (3) is detachably connected with the lower core rod (4).

2. The valve-coated sand core of claim 1, wherein: the lower core (4) is cylindrical, and the lower end of the lower core is also provided with a positioning part (41) exposed out of the lower core (2).

3. The valve-coated sand core of claim 2, wherein: the positioning part (41) is in a hexagonal frustum pyramid shape and is integrally connected with the lower core rod (4).

4. The valve-coated sand core of claim 1, wherein: the upper core (3) is cylindrical, and the upper end of the upper core is also integrally provided with a hanging ring (31) which is exposed out of the upper core (1).

5. The valve-coated sand core of claim 1, wherein: the lower end of the upper core rod (3) is also provided with a first connecting hole (32); a second connecting hole (42) is also formed in the lower core (4); fastening bolts penetrate through the first connecting holes (32) and the second connecting holes (42), so that the upper core (3) and the lower core (4) are detachably connected.

6. The valve-coated sand core of claim 5, wherein: the upper end of the lower core rod (4) is also provided with a pair of positioning bulges (43); the lower end of the upper core rod (3) is also provided with a pair of positioning holes (33) matched with the positioning bulges (43); the positioning projection (43) can be inserted into or removed from the positioning hole (33).

7. The valve-coated sand core of claim 1, wherein: the lower surface of the first upper core part (11) is also provided with a ring-shaped overflow groove (111); the first upper core part (11) is internally provided with an air escape hole (112) which is communicated up and down; the air escape hole (112) is communicated with the overflow groove (111).

8. The valve-coated sand core of claim 1, wherein: and metal wire nets are respectively wound in the upper core body (1) and the lower core body (2).

9. The valve coated sand core of any one of claims 1 to 8, wherein: the exposed surfaces of the upper core body (1) and the lower core body (2) are also coated with a high-temperature resistant coating; the thickness of the high-temperature resistant coating layer is 0.2-0.3 mm.