CN215721027U

CN215721027U - Vacuumizing one-way valve for vacuum furnace

Info

Publication number: CN215721027U
Application number: CN202122261337.6U
Authority: CN
Inventors: 王德程; 袁寰宇; 史廷芳; 毕思为
Original assignee: Fushun Rongsheng Machinery Manufacturing Co ltd
Current assignee: Fushun Rongsheng Machinery Manufacturing Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-01
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a vacuumizing one-way valve for a vacuum furnace, which comprises a valve body and a valve core, wherein a first cylindrical hole is formed in the center of the bottom of the valve body, a second cylindrical hole is formed in the center of the top of the valve body, the valve core comprises a valve rod and a piston, the valve rod is arranged in the center of the interior of the valve body, a sleeve is sleeved on the upper portion of the valve rod, a connecting rod is welded between the outer wall of the sleeve and the inner wall of the second cylindrical hole, the top end of the valve rod extends to the outer side of the sleeve and is welded with a limiting block, the bottom end of the valve rod extends into the first cylindrical hole and is fixedly connected with the piston, and a spring is sleeved on the valve rod and positioned between the piston and the sleeve. According to the vacuumizing one-way valve for the vacuum furnace, disclosed by the utility model, gas is effectively prevented from entering the vacuum furnace again, the vacuum environment in the vacuum furnace is ensured, and the valve body is convenient to mount and fix through the arrangement of the upper flange plate and the lower flange plate.

Description

Vacuumizing one-way valve for vacuum furnace

Technical Field

The utility model relates to the technical field of vacuum furnaces, in particular to a vacuumizing one-way valve for a vacuum furnace.

Background

The vacuum furnace is a vacuum furnace, namely, a vacuum system (formed by elaborately assembling elements such as a vacuum pump, a vacuum measuring device, a vacuum valve and the like) is utilized to discharge partial substances in a furnace chamber in a specific space of the furnace chamber, so that the pressure in the furnace chamber is less than a standard atmospheric pressure, and the space in the furnace chamber realizes a vacuum state, namely, the vacuum furnace is a vacuum furnace which generally comprises a host, a furnace chamber, an electric heating device, a sealed furnace shell, a vacuum system, a power supply system, a temperature control system, a transport vehicle outside the furnace and the like. The sealed furnace shell is welded by carbon steel or stainless steel, and the joint surface of the detachable part is sealed by vacuum sealing material. In order to prevent the furnace shell from deforming after being heated and the sealing material from deteriorating after being heated, the furnace shell is cooled by water cooling or air cooling. The hearth is positioned in the sealed furnace shell.

The one-way conduction effect of the valve body of the existing vacuumizing one-way valve for the vacuum furnace is poor, and the existing vacuumizing one-way valve is short of a pipeline connecting structure, so that the requirements of users cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vacuumizing one-way valve for a vacuum furnace, which effectively prevents gas from entering the vacuum furnace again, ensures the vacuum environment in the vacuum furnace, and is convenient for mounting and fixing a valve body by arranging an upper flange plate and a lower flange plate.

In order to achieve the purpose, the utility model adopts the following technical scheme: a vacuumizing one-way valve for a vacuum furnace comprises a valve body and a valve core, wherein a first cylindrical hole is formed in the center of the bottom of the valve body, a second cylindrical hole is formed in the center of the top of the valve body, the first cylindrical hole and the second cylindrical hole are communicated with each other, and the valve core is arranged in the first cylindrical hole and the second cylindrical hole;

the valve core comprises a valve rod and a piston, the valve rod is arranged at the center inside the valve body, a sleeve is sleeved on the upper portion of the valve rod, a connecting rod is welded between the outer wall of the sleeve and the inner wall of the second cylindrical hole, the top end of the valve rod extends to the outer side of the sleeve and is welded with a limiting block, the bottom end of the valve rod extends into the first cylindrical hole and is fixedly connected with the piston, and a spring is sleeved on the valve rod between the piston and the sleeve.

As a further description of the above technical solution:

the valve body is characterized in that an upper flange plate is welded to the top of the outer wall of the valve body, a sealing ring is embedded and bonded to the upper surface of the upper flange plate, and upper bolt holes are formed in the periphery of the outer side, located on the upper surface of the sealing ring, of the upper flange plate.

As a further description of the above technical solution:

the bottom end of the outer wall of the valve body is welded with a lower flange plate, and lower bolt holes are formed in the periphery of the upper surface of the lower flange plate, which is located on the outer side of the valve body.

As a further description of the above technical solution:

the piston is in interference fit with the first cylindrical hole, and the inner diameter of the first cylindrical hole is smaller than that of the second cylindrical hole.

As a further description of the above technical solution:

the connecting rods are arranged in four, the four connecting rods are distributed annularly, and an included angle of ninety degrees is formed between every two adjacent connecting rods.

The utility model provides a vacuumizing one-way valve for a vacuum furnace. The method has the following beneficial effects:

this a vacuum pumping check valve for vacuum furnace, when using, be connected valve body top and exhaust tube, be connected valve body bottom and furnace body blast pipe, when using, atmospheric pressure through the vacuum pump production, move to the second cylindrical hole in on the drive piston, the valve rod shifts up this moment, the spring shrink, the piston is not at sealed valve body, alright in order to carry out the evacuation to the vacuum furnace, after the evacuation is accomplished, the vacuum pump is not producing atmospheric pressure this moment, the piston moves down in the first cylindrical hole under the spring action of spring, seal the valve body, thereby realize one-way switching on, effectually prevent that gas from entering into the vacuum furnace once more, the vacuum environment in the vacuum furnace has been guaranteed, further setting through upper flange dish and lower flange dish, the installation that has made things convenient for the valve body is fixed.

Drawings

FIG. 1 is a schematic cross-sectional view of a vacuum-pumping check valve for a vacuum furnace according to the present invention;

FIG. 2 is a front view of a vacuum-pumping check valve for a vacuum furnace according to the present invention;

fig. 3 is a schematic structural view of the valve cartridge of the present invention.

Illustration of the drawings:

1. a valve body; 2. a first cylindrical bore; 3. a second cylindrical bore; 4. a valve core; 41. a valve stem; 42. a limiting block; 43. a sleeve; 44. a connecting rod; 45. a spring; 46. a piston; 5. an upper flange plate; 6. an upper bolt hole; 7. a seal ring; 8. a lower flange plate; 9. and (4) a lower bolt hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a vacuum-pumping one-way valve for a vacuum furnace comprises a valve body 1 and a valve core 4, wherein a first cylindrical hole 2 is formed in the center of the bottom of the valve body 1, a second cylindrical hole 3 is formed in the center of the top of the valve body 1, the first cylindrical hole 2 and the second cylindrical hole 3 are communicated with each other, and the valve core 4 is arranged inside the first cylindrical hole 2 and the second cylindrical hole 3;

the valve core 4 comprises a valve rod 41 and a piston 46, the valve rod 41 is arranged at the center inside the valve body 1, a sleeve 43 is sleeved on the upper portion of the valve rod 41, a connecting rod 44 is welded between the outer wall of the sleeve 43 and the inner wall of the second cylindrical hole 3, the top end of the valve rod 41 extends to the outer side of the sleeve 43 and is welded with a limiting block 42, the bottom end of the valve rod 41 extends into the first cylindrical hole 2 and is fixedly connected with the piston 46, and a spring 45 is sleeved on the valve rod 41 and located between the piston 46 and the sleeve 43.

An upper flange plate 5 is welded at the top of the outer wall of the valve body 1, a sealing ring 7 is embedded and bonded on the upper surface of the upper flange plate 5, and upper bolt holes 6 are formed in the periphery of the outer side, located on the sealing ring 7, of the upper surface of the upper flange plate 5.

The bottom end of the outer wall of the valve body 1 is welded with a lower flange plate 8, lower bolt holes 9 are formed in the periphery, located on the outer side of the valve body 1, of the upper surface of the lower flange plate 8, the lower bolt holes 9 are used for installing and fixing the lower flange plate 8 through batch-checking fixing bolts, and a sealing ring 7 is also embedded and bonded on the lower surface of the lower flange plate 8.

Piston 46 and first cylindrical hole 2 interference fit, the internal diameter of first cylindrical hole 2 is less than the internal diameter of second cylindrical hole 3, when piston 46 is located first cylindrical hole 2, can seal first cylindrical hole 2, when piston 46 is located second cylindrical hole 3, can not seal second cylindrical hole 3 for valve body 1 switches on.

The number of the connecting rods 44 is four, the four connecting rods 44 are distributed annularly, an included angle of ninety degrees is formed between every two adjacent connecting rods 44, and the connecting rods 44 are used for limiting and fixing the sleeve 43 in the second cylindrical hole 3.

The working principle is as follows: this a vacuum furnace is with when evacuation check valve uses, with bolt hole 6 and fixing bolt and exhaust tube connection in the valve body 1 top through the cooperation of last ring flange 5, with bolt hole 9 and fixing bolt and furnace body blast pipe connection under the cooperation of lower ring flange 8 in valve body 1 bottom, when using, atmospheric pressure through the vacuum pump production, drive piston 46 and shift up in the cylindrical hole of second 3, valve rod 41 shifts up this moment, spring 45 shrink, piston 46 is not at sealed valve body 1, valve body 1 switches on, alright with carry out the evacuation to the vacuum furnace, after the evacuation is accomplished, the vacuum pump is not producing atmospheric pressure this moment, piston 46 moves down in first cylindrical hole 2 under spring 45's elasticity effect, seal valve body 1, thereby make valve body 1 one-way switch on, effectually prevent that gas from entering into the vacuum furnace once more.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A vacuumizing one-way valve for a vacuum furnace comprises a valve body (1) and a valve core (4), and is characterized in that a first cylindrical hole (2) is formed in the center of the bottom of the valve body (1), a second cylindrical hole (3) is formed in the center of the top of the valve body (1), the first cylindrical hole (2) and the second cylindrical hole (3) are communicated with each other, and the valve core (4) is arranged inside the first cylindrical hole (2) and the second cylindrical hole (3);

valve core (4) include valve rod (41) and piston (46), valve rod (41) set up in valve body (1) inside center department, the upper portion cover of valve rod (41) is equipped with sleeve pipe (43), and the welding has connecting rod (44) between the outer wall of sleeve pipe (43) and the inner wall of the cylindrical hole of second (3), the top of valve rod (41) extends to the outside of sleeve pipe (43) and welds stopper (42), the bottom of valve rod (41) extends to in the cylindrical hole of first (2) and the rigid coupling has piston (46), it is equipped with spring (45) to lie in the cover between piston (46) and sleeve pipe (43) on valve rod (41).

2. The vacuumizing one-way valve for the vacuum furnace according to claim 1, wherein an upper flange (5) is welded at the top of the outer wall of the valve body (1), a sealing ring (7) is embedded and bonded on the upper surface of the upper flange (5), and upper bolt holes (6) are formed in the upper surface of the upper flange (5) and positioned on the periphery of the outer side of the sealing ring (7).

3. The vacuum-pumping check valve for the vacuum furnace as claimed in claim 1, characterized in that a lower flange (8) is welded at the bottom end of the outer wall of the valve body (1), and lower bolt holes (9) are formed in the periphery of the upper surface of the lower flange (8) and positioned outside the valve body (1).

4. The vacuum check valve for the vacuum furnace as claimed in claim 1, wherein the piston (46) is in interference fit with the first cylindrical hole (2), and the inner diameter of the first cylindrical hole (2) is smaller than that of the second cylindrical hole (3).

5. The vacuum-pumping check valve for the vacuum furnace as claimed in claim 1, wherein the number of the connecting rods (44) is four, and the four connecting rods (44) are distributed annularly, and an included angle of ninety degrees is formed between two adjacent connecting rods (44).