Water-cooled explosion-proof valve for electron beam cooling bed vacuum melting furnace

Abstract

Provided is a water-cooled explosion-proof valve for an electron beam cooling bed vacuum melting furnace, comprising an inner connecting tube and an outer connecting tube connected to the interior of the furnace body and fixed on the furnace wall, an annular flange is fixed to the upper end of the inner connecting tube 1 and the outer connecting tube, and the annular flange is detachably fixedly connected to the flange plate at the lower end of the pressure frame, a spring mounting set is provided at the middle of the upper end of the pressure frame, the lower end of which is connected to the water-cooled valve plate arranged in the center hole of the flange plate through a valve plate seat, and the lower end of the spring installed and positioned on the spring mounting set is against the valve plate seat, and the water-cooled valve plate is tightly sealed against the upper end face of the annular flange through the sealing ring on its bottom surface under the action of the spring. The utility model effectively solves the explosion caused by overpressure in the electron beam cooling bed vacuum melting furnace, improves the safety factor of the electron beam cooling bed vacuum melting furnace, eliminates the potential safety hazards in the use process, and ensures the vacuum degree in the furnace, with small size, good safety and reliability, and low production cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of electron beam cooling bed vacuum melting furnaces, and in particular relates to a water-cooled explosion-proof valve for an electron beam cooling bed vacuum melting furnace. Background Art

[0002] At present, the electron beam cold bed vacuum melting furnace (EB furnace for short) is an important equipment for melting titanium and titanium alloys. The EB furnace melting is carried out under high vacuum. During melting, the temperature in the melting chamber is high and the liquid state is maintained for a long time, so that the refining and purification of the material can be carried out fully and effectively. During the smelting period of the EB furnace, the pressure in the smelting chamber is 0.13Pa, and the temperature in the smelting area is about 3000℃. First, if there is a water leak, the water will vaporize instantly, causing the pressure in the smelting chamber to increase rapidly; second, if the valve is misoperated, the vacuum oil of the booster pump will return to the smelting chamber, and the vacuum oil will explode when it encounters high temperature, causing the pressure in the smelting chamber to increase rapidly; third, if the power, water, and gas are cut off, the pressure in the smelting chamber will increase; and the increase in pressure in the smelting chamber will damage the equipment, and if the pressure limit of the equipment is exceeded, the equipment will explode, and even cause casualties; there are frequent cases of overpressure explosion of the furnace due to water leakage and misoperation at home and abroad, and there are reports of casualties, and the safety factor is extremely low; at the same time, the existing explosion-proof device has a complex structure, a large volume, a small pressure relief port, no water cooling structure, and a high cost, which does not meet the conditions for use on the electron beam cooling bed vacuum melting furnace. Therefore, it is necessary to make improvements. Utility Model Content

[0003] The technical problem solved by the utility model is: to provide a water-cooled explosion-proof valve for an electron beam cooling bed vacuum melting furnace, which provides support conditions for the installation of a spring mounting set and a spring by using a detachable fixed pressure frame on a flange plate, and under the action of the spring, a water-cooled valve plate adapted to the flange plate and an annular flange are reliably sealed, thereby effectively solving the explosion caused by overpressure in the electron beam cooling bed vacuum melting furnace and improving the safety factor of the electron beam cooling bed vacuum melting furnace; while eliminating the potential safety hazards existing during use, the vacuum degree in the furnace is ensured, the safety and reliability are good, and the production cost is low.

[0004] The technical solution adopted by the utility model is as follows: a water-cooled explosion-proof valve for an electron beam cooling bed vacuum melting furnace comprises an inner connecting tube and an outer connecting tube which are connected to the inside of the furnace body and fixed on the furnace wall; annular flanges are fixed to the upper ends of the inner connecting tube 1 and the outer connecting tube, and the annular flange is detachably fixedly connected to a flange plate at the lower end of a pressure frame; a spring mounting set is provided in the middle of the upper end of the pressure frame, the lower end of which is connected to a water-cooled valve plate arranged in a central hole of the flange plate through a valve plate seat, and the lower end of a spring mounted and positioned on the spring mounting set abuts against the valve plate seat, and the water-cooled valve plate is tightly sealed against the upper end face of the annular flange through a sealing ring on its bottom surface under the action of the spring.

[0005] Among them, the spring mounting sleeve group includes a mounting sleeve and an intermediate sleeve mounted on the upper end of the mounting sleeve, the intermediate sleeve is adapted and positioned in the middle of the pressure frame, the lower end of the mounting sleeve is adapted to the center hole of the valve plate seat, and the positioning protrusion ring arranged on the outer circumferential wall of the lower end of the mounting sleeve is in contact with the upper plate surface of the valve plate seat for positioning, the spring is mounted on the mounting sleeve, and the upper and lower ends of the spring respectively abut against the gasket on the lower end surface of the middle part of the pressure frame and the valve plate seat.

[0006] Furthermore, the intermediate sleeve adopts a wear-resistant copper sleeve, and the positioning shaft at the lower end of the outer circumferential wall of the intermediate sleeve abuts against the lower end surface of the middle part of the pressure frame. A plurality of threaded holes are evenly distributed on the circumference of the contact circle under which the intermediate sleeve and the mounting sleeve are adapted, and the intermediate sleeve and the mounting sleeve are fastened and fixed by screws adapted to be connected in the threaded holes, and the washer is sleeved on the intermediate sleeve.

[0007] Furthermore, the water-cooling valve plate is a double-layer structure with a water-cooling cavity inside, and a water inlet pipe and a water outlet pipe communicating with the internal water-cooling cavity are fixed to the upper surface of the water-cooling valve plate.

[0008] Furthermore, the pressure frame includes a flange plate, a fixed sleeve and a plurality of L-shaped pressure plates evenly distributed on the outer circumferential wall of the fixed sleeve. The lower edges of the inner ends of the plurality of L-shaped pressure plates are in contact with the positioning ring table on the outer circumferential wall of the lower end of the fixed sleeve for positioning, and the gasket on the intermediate sleeve mounted in the spring mounting sleeve group is located on the lower end surface of the fixed sleeve.

[0009] Furthermore, the annular flange and the connecting inner tube and the connecting outer tube whose lower end is connected to the equipment form a sealed water cooling channel.

[0010] The advantages of this utility model compared with the prior art:

[0011] 1. This technical solution provides support conditions for the spring installation set and the installation of the spring by detachably fixing the pressure frame on the flange plate, which is convenient for disassembly and maintenance;

[0012] 2. Under the action of the spring, the water-cooled valve plate adapted to the flange plate and the annular flange can be reliably sealed to ensure the vacuum degree in the furnace during normal operation;

[0013] 3. This technical solution adopts a double-layer water-cooled valve plate with a water-cooled cavity inside, and connects the water-cooled valve plate with the cooling water circulation pipeline through the water inlet and outlet pipes on it, which effectively reduces the temperature of the water-cooled valve plate, protects the sealing ring from being burned, and improves the service life of the sealing ring and the sealing performance of the equipment;

[0014] 4. This technical solution adjusts the pressure of the spring on the valve plate seat by adjusting the thickness of the gasket above the spring, thereby adjusting the opening pressure of the explosion-proof valve. The adjustment range is large and the opening pressure is controllable;

[0015] 5. This technical solution effectively solves the explosion caused by overpressure in the electron beam cooling bed vacuum melting furnace, improves the safety factor of the electron beam cooling bed vacuum melting furnace; eliminates the potential safety hazards during use while ensuring the vacuum degree in the furnace, with good safety and reliability and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal connection structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the planar structure of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiment of the present utility model Figure 1-3 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0022] Electron beam cooling bed vacuum melting furnace water cooling explosion-proof valve, such as Figure 1-3As shown, it includes a connecting inner tube 1 and a connecting outer tube 14 which are connected to the inside of the furnace body and fixed on the furnace wall, the upper ends of the connecting inner tube 1 and the connecting outer tube 14 are fixed with an annular flange 2, and the lower ends of the connecting inner tube 1 and the connecting outer tube 14 are connected to the equipment to form a sealed water-cooling channel with the annular flange 2, and the annular flange 2 is detachably fixedly connected to the flange plate 3-3 at the lower end of the pressure frame 3, wherein the flange plate 3-3 and the annular flange 2 are detachably fixedly connected by a plurality of bolts evenly distributed around the circumference and nuts adapted to the bolts, and a spring mounting set is provided in the middle of the upper end of the pressure frame 3, the lower end of which is connected to the water-cooling valve plate 5 arranged in the center hole of the flange plate 3-3 through a valve plate seat 7, and the spring mounting set is installed The lower end of the spring 6 mounted on the spring mounting set abuts against the valve plate seat 7, and the water-cooled valve plate 5 is sealed against the upper end surface of the annular flange 2 through the sealing ring 8 on its bottom surface under the action of the spring 6; in the above structure, a detachable fixed pressure frame 3 is provided on the flange plate 3-3 to provide support conditions for the installation of the spring mounting set and the spring 6, and disassembly and maintenance are convenient; under the action of the spring 6, the water-cooled valve plate 5 adapted to the flange plate 3-3 is reliably sealed with the annular flange 2 to ensure the vacuum degree in the furnace during normal operation; the explosion caused by overpressure in the electron beam cooling bed vacuum melting furnace is effectively solved, and the safety factor of the electron beam cooling bed vacuum melting furnace is improved.

[0023] like Figure 2 As shown, the specific structure of the spring installation set is as follows: the spring installation set includes a mounting sleeve 11 and an intermediate sleeve 10 sleeved on the upper end of the mounting sleeve 11, the intermediate sleeve 10 is adapted to be positioned in the middle of the pressure frame 3, the lower end of the mounting sleeve 11 is adapted to the central hole of the valve plate seat 7, and the positioning convex ring provided on the outer circumferential wall of the lower end of the mounting sleeve 11 is in contact with the upper plate surface of the valve plate seat 7 for positioning, wherein the valve plate seat 7 is fixed to the middle part of the upper end surface of the water-cooled valve 5 by a plurality of screws evenly distributed around the circumference, the spring 6 is sleeved on the mounting sleeve 11, and the upper and lower ends of the spring 6 are respectively against the gasket and the lower end surface of the middle part of the pressure frame 3 On the valve plate seat 7; specifically, the intermediate sleeve 10 adopts a wear-resistant copper sleeve, and the positioning shaft at the lower end of the outer circumferential wall of the intermediate sleeve 10 is against the lower end surface of the middle part of the pressure frame 3. The intermediate sleeve 10 and the mounting sleeve 11 are adapted to each other and are evenly distributed on the circumference of the contact circle with a plurality of threaded holes 12, and the intermediate sleeve 10 and the mounting sleeve 11 are fastened and fixed by screws adapted to be connected in the threaded holes 12, thereby preventing the intermediate sleeve 10 and the mounting sleeve 11 from rotating relative to each other, so that they form a whole, and the gasket 4 is sleeved on the intermediate sleeve 10, and the pressure of the spring 6 on the valve plate seat 7 is adjusted by the thickness of the gasket sleeve.

[0024] Among them, in order to improve the service life of the sealing ring 8 and prevent it from being burned, the water-cooled valve plate 5 is a double-layer structure with a water-cooling cavity inside, and the upper end surface of the water-cooled valve plate 5 is fixed with a water inlet pipe 13 and a water outlet pipe 9 connected to the internal water-cooling cavity, wherein the water-cooling valve plate 5 is not provided with a water-cooling cavity in the middle, so as to facilitate the installation of the valve plate seat 7 in the middle of the water-cooled valve plate 5; specifically, the annular flange 2 and the connecting inner pipe 1 and the connecting outer pipe 14 connected to the equipment at the lower end form a sealed water-cooling channel; in the above structure, a water-cooled valve plate 5 with a double-layer structure having a water-cooling cavity inside is adopted, and the water-cooled valve plate 5 is connected to the cooling water circulation pipeline through the water inlet pipe and the water outlet pipe thereon, so as to effectively reduce the temperature of the water-cooled valve plate 5, protect the sealing ring 8 from being burned, and improve the service life of the sealing ring and the sealing performance of the equipment;

[0025] like Figure 1 As shown, the specific structure of the pressure frame 3 is as follows: the pressure frame 3 includes a flange plate 3-3, a fixed sleeve 3-1 and a plurality of L-shaped pressure plates 3-2 uniformly distributed on the outer circumferential wall of the fixed sleeve 3-1, the lower edges of the inner ends of the plurality of L-shaped pressure plates 3-2 are in contact with the positioning ring table on the outer circumferential wall of the lower end of the fixed sleeve 3-1, and the gasket on the intermediate sleeve 10 sleeved in the spring installation sleeve is located on the lower end surface of the fixed sleeve 3-1; this structure simplifies the installation and support structure of the spring 6, makes it convenient and quick to disassemble and assemble, reduces costs, and increases service life.

[0026] This technical solution eliminates potential safety hazards during use while ensuring the vacuum degree in the furnace, has good safety and reliability, and low production costs.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The electron beam cooling bed vacuum melting furnace uses a water-cooled explosion-proof valve, which is characterized by: The invention comprises an inner connecting tube (1) and an outer connecting tube (14) which are connected to the inside of the furnace body and fixed on the furnace wall, wherein an annular flange (2) is fixed to the upper end of the inner connecting tube (1) and the outer connecting tube (14), and the annular flange (2) is detachably fixedly connected to a flange plate (3-3) at the lower end of a pressure frame (3), and a spring mounting set is provided at the middle part of the upper end of the pressure frame (3), the lower end of which is connected to a water-cooled valve plate (5) arranged in the center hole of the flange plate (3-3) through a valve plate seat (7), and the lower end of a spring (6) mounted and positioned on the spring mounting set abuts against the valve plate seat (7), and the water-cooled valve plate (5) is tightly sealed against the upper end surface of the annular flange (2) through a sealing ring (8) on its bottom surface under the action of the spring (6).

2. The water-cooled explosion-proof valve for the electron beam cooling bed vacuum melting furnace according to claim 1 is characterized in that: The spring mounting sleeve assembly comprises a mounting sleeve (11) and an intermediate sleeve (10) mounted on the upper end of the mounting sleeve (11); the intermediate sleeve (10) is adapted to be positioned in the middle of the pressure frame (3); the lower end of the mounting sleeve (11) is adapted to be positioned in the center hole of the valve plate seat (7); and a positioning protruding ring provided on the outer circumferential wall of the lower end of the mounting sleeve (11) is in contact with the upper plate surface of the valve plate seat (7) for positioning; the spring (6) is mounted on the mounting sleeve (11), and the upper and lower ends of the spring (6) respectively abut against the gasket (4) on the lower end surface of the middle of the pressure frame (3) and the valve plate seat (7).

3. The water-cooled explosion-proof valve for the electron beam cooling bed vacuum melting furnace according to claim 2 is characterized in that: The intermediate sleeve (10) is a wear-resistant copper sleeve. The positioning shaft at the lower end of the outer circumferential wall of the intermediate sleeve (10) abuts against the lower end surface of the middle part of the pressure frame (3). A plurality of threaded holes (12) are evenly distributed on the circumference of the contact circle between the intermediate sleeve (10) and the mounting sleeve (11). The intermediate sleeve (10) and the mounting sleeve (11) are locked and fixed by screws that are adapted to be connected in the threaded holes (12). The washer (4) is sleeved on the intermediate sleeve (10).

4. The water-cooled explosion-proof valve for the electron beam cooling hearth vacuum melting furnace according to claim 1 is characterized in that: The water-cooling valve plate (5) is a double-layer structure with a water-cooling cavity provided inside, and a water inlet pipe (13) and a water outlet pipe (9) communicating with the internal water-cooling cavity are fixed to the upper end surface of the water-cooling valve plate (5).

5. The water-cooled explosion-proof valve for the electron beam cooling hearth vacuum melting furnace according to claim 1 is characterized in that: The pressure frame (3) comprises a flange plate (3-3), a fixing sleeve (3-1) and a plurality of L-shaped pressure plates (3-2) uniformly distributed on the outer circumferential wall of the fixing sleeve (3-1), the inner lower edges of the plurality of L-shaped pressure plates (3-2) contact and position with a positioning ring table on the outer circumferential wall of the lower end of the fixing sleeve (3-1), and a gasket on an intermediate sleeve (10) sleeved in the spring installation sleeve is located on the lower end surface of the fixing sleeve (3-1).

6. The water-cooled explosion-proof valve for the electron beam cooling hearth vacuum melting furnace according to any one of claims 1 to 5, characterized in that: The annular flange (2), the connecting inner tube (1) whose lower end is connected to the equipment, and the connecting outer tube (14) form a sealed water cooling channel.

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