Wear-resistant and high-temperature-resistant integrated half-jacketed ball valve with heat preservation shell

Abstract

The utility model relates to a wear-resistant and high-temperature-resistant integrated half jacket ball valve with a heat preservation shell, which comprises a valve body, the inner cavity of the valve body is fixedly connected with a valve seat, the inner side of the valve seat is movably connected with a valve ball, the valve seat and the valve ball are made of stainless steel through a stellite hard alloy spray welding process, and all the parts are matched with one another to form the wear-resistant and high-temperature-resistant integrated half jacket ball valve. The thin sheets are turned at the two ends of the valve body respectively, the heat preservation jacket covers the two thin sheets for welding, the heat preservation jacket does not make direct contact with the valve body, a certain distance exists between the two thin sheets and the two ends of the valve body, welding of the heat preservation jacket is convenient, and heat preservation liquid leakage caused by welding defects is not likely to occur; the valve seat and the valve ball adopt a stainless steel spray welding stellite hard alloy process, so that the characteristics of high temperature resistance, wear resistance and the like can be achieved while a certain hardness difference is ensured, the sealing mode of the valve ball and the valve seat is hard sealing, the sealing effect between the valve seat and the valve ball is improved by the sealing layer, and the graphite has the effects of wear resistance and high temperature resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to an integrated semi-jacketed ball valve which is wear-resistant, high-temperature-resistant and has a heat-insulating shell. Background Art

[0002] Jacketed ball valves are widely used in various systems such as petroleum, chemical, metallurgy, pharmaceutical, and food to transport high-viscosity media that will solidify or crystallize at room temperature. Jacketed ball valves are welded with metal jackets on the basis of ball valves, which are used to inject steam or other heat-insulating or cold-insulating media to ensure that the media in the valve can work normally. Jacketed ball valves are also called heat-insulating ball valves. Jacketed ball valves have good heat-insulating and cold-insulating properties.

[0003] At present, if the reduced diameter flange space of the existing one-piece jacketed ball valve is not large enough, it will affect the installation of the flange stud nut at the pipeline end, so that the welding of the insulation layer is more difficult and is prone to welding defects. Utility Model Content

[0004] The utility model aims to provide an integrated semi-jacketed ball valve with a wear-resistant and high-temperature-resistant self-insulating shell to solve the problems mentioned in the above background technology.

[0005] The technical solution of the utility model is a wear-resistant and high-temperature resistant integrated semi-jacketed ball valve with an insulation shell, comprising a valve body, the inner cavity of the valve body is fixedly connected to a valve seat, the inner side of the valve seat is movably connected to a valve ball, the valve seat and the valve ball are made of stainless steel spray-welded Stellite hard alloy process, the surfaces of the valve seat and the valve ball are fixedly connected with a sealing layer, the top of the valve body is fixedly bearing-sleeved with a valve stem, the bottom end of the valve stem is fixedly connected to the top end of the valve ball, the outer surface of the valve body is fixedly sleeved with two thin sheets, the thin sheets and the valve body are integrally formed, the two groups of thin sheets are symmetrically arranged, and the outer side of the thin sheets is welded with an insulation jacket.

[0006] In one embodiment, the thickness of the sheet is 3-5 mm, the height of the sheet is 15-20 mm, and a welding chamfer is provided at the top of the sheet.

[0007] In one embodiment, the sealing layer is made of graphite.

[0008] In one embodiment, a through hole is opened on the top of the thermal insulation jacket, a sealing ring is laid on the middle part of the surface of the valve stem, and the middle part of the surface of the valve stem is movably sleeved in the through hole.

[0009] The beneficial effects provided by the utility model are:

[0010] Through the cooperation between the various components, thin sheets are respectively turned out at both ends of the valve body, and the insulation jacket is covered on the two thin sheets for welding. The insulation jacket is not in direct contact with the valve body, and the two thin sheets are at a certain distance from the two ends of the valve body. It is more convenient to weld the insulation jacket and it is not easy to produce welding defects that lead to leakage of insulation liquid. The stainless steel spray-welded Stellite carbide process used for the valve seat and valve ball can achieve high temperature resistance and wear resistance while ensuring a certain hardness difference. The sealing method of the valve ball and the valve seat is hard sealing. The sealing layer improves the sealing effect between the valve seat and the valve ball, and graphite is wear-resistant and high-temperature resistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view of the utility model;

[0012] Figure 2 It is the main sectional view of the utility model.

[0013] In the attached drawings, 1, valve body; 2, valve seat; 3, valve ball; 4, sealing layer; 5, valve stem; 6, thin sheet; 7, insulation jacket. DETAILED DESCRIPTION

[0014] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0015] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0016] In one embodiment, Figure 1 and Figure 2As shown, a wear-resistant and high-temperature resistant integrated semi-jacketed ball valve with a thermal insulation shell includes a valve body 1, the inner cavity of the valve body 1 is fixedly connected to a valve seat 2, the inner side of the valve seat 2 is movably connected to a valve ball 3, the valve seat 2 and the valve ball 3 are made of stainless steel spray-welded Stellite hard alloy process, the surfaces of the valve seat 2 and the valve ball 3 are fixedly connected to a sealing layer 4, the top of the valve body 1 is fixedly sleeved with a valve stem 5, the bottom end of the valve stem 5 is fixedly connected to the top end of the valve ball 3, the outer surface of the valve body 1 is fixedly sleeved with two thin sheets 6, the thin sheets 6 and the valve body 1 are integrally formed, the two groups of thin sheets 6 are symmetrically arranged, and the outer side of the thin sheets 6 is welded with a thermal insulation jacket 7.

[0017] In order to leave enough height of the sheet 6 on the valve body 1 to achieve good thermal insulation effect, the thickness of the sheet 6 is 3-5 mm, the height of the sheet 6 is 15-20 mm, and the top of the sheet 6 is provided with a welding chamfer.

[0018] In order to make the sealing layer 4 wear-resistant and high-temperature-resistant and to increase the service life of the sealing layer 4 , the sealing layer 4 is made of graphite.

[0019] In order to allow the valve stem 5 to pass through the top of the insulation jacket 7, a through hole is opened on the top of the insulation jacket 7, and a sealing ring is laid in the middle of the surface of the valve stem 5. The middle part of the surface of the valve stem 5 is movably sleeved in the through hole. The sealing ring can ensure the sealing effect between the valve stem 5 and the insulation jacket 7.

[0020] Working principle: When the utility model is used, thin sheets 6 are respectively machined at both ends of the valve body 1, the thickness of the thin sheets 6 is 3-5mm, and the height is 15-20mm, so as to ensure the thermal insulation effect, and a welding chamfer is reserved on the top of the thin sheets 6, and then the thermal insulation jacket 7 is covered on the two thin sheets 6 for welding. The thermal insulation jacket 7 is not in direct contact with the valve body 1, and the two thin sheets 6 are at a certain distance from the two ends of the valve body 1, which is more convenient when welding the thermal insulation jacket 7, and it is not easy to produce welding defects that lead to leakage of the thermal insulation liquid. The stainless steel spray-welded Stellite carbide process used for the valve seat 2 and the valve ball 3 can achieve the characteristics of high temperature resistance and wear resistance while ensuring a certain hardness difference. The sealing method of the valve ball 3 and the valve seat 2 is a hard seal, and the sealing layer 4 improves the sealing effect between the valve seat 2 and the valve ball 3, and the graphite has the effects of wear resistance and high temperature resistance.

[0021] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0022] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An integrated semi-jacketed ball valve with a wear-resistant and high-temperature resistant insulation shell, characterized in that: It includes a valve body, the inner cavity of the valve body is fixedly connected to a valve seat, the inner side of the valve seat is movably connected to a valve ball, the valve seat and the valve ball are made of stainless steel spray-welded Stellite carbide process, the surfaces of the valve seat and the valve ball are fixedly connected with a sealing layer, the top of the valve body is fixedly bearing-sleeved with a valve stem, the bottom end of the valve stem is fixedly connected to the top end of the valve ball, the outer surface of the valve body is fixedly sleeved with two thin sheets, the thin sheets and the valve body are integrally formed, the two groups of thin sheets are symmetrically arranged, and the outer side of the thin sheets is welded with a thermal insulation jacket.

2. The wear-resistant and high-temperature-resistant integrated semi-jacketed ball valve with a heat-insulating shell as claimed in claim 1, characterized in that: The thickness of the sheet is 3-5 mm, the height of the sheet is 15-20 mm, and a welding chamfer is provided on the top of the sheet.

3. The wear-resistant and high-temperature-resistant integrated semi-jacketed ball valve with a heat-insulating shell as claimed in claim 1, characterized in that: The sealing layer is made of graphite.

4. The wear-resistant and high-temperature-resistant integrated semi-jacketed ball valve with a heat-insulating shell as claimed in claim 1, characterized in that: A through hole is provided on the top of the heat-insulating jacket, a sealing ring is provided in the middle of the surface of the valve stem, and the middle of the surface of the valve stem is movably sleeved in the through hole.

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