Anti-overcharging safety protection device of selenylation furnace

Abstract

The utility model discloses an anti-overcharge safety protection device of a selenylation furnace, which belongs to the field of self-closing valves of tube furnaces, and is characterized in that an anti-overcharge valve is additionally connected between a gas supply pipe and a manual valve, so that the anti-overcharge safety protection device has the effect of automatically closing after the pressure of filled nitrogen reaches a set value; the anti-overcharge valve can stop the air supply pipe from continuously inflating the inside of the glass tank body through the manual valve, so that the effect that the anti-overcharge valve can stop the inflation air source in time even if an operator does not close the manual valve in time is achieved, the phenomenon that the glass tank body is overcharged and exploded is avoided, and the safety and the automation degree during use are improved.

Description

Technical Field

[0001] The utility model relates to the field of self-closing valves of tubular furnaces, and more particularly to an anti-overcharging safety protection device for selenization furnaces. Background Art

[0002] As a commonly used heating device, tubular furnaces offer advantages such as uniform temperature and precise temperature control, making them widely used in the heat treatment and synthesis of various materials. Using tubular furnaces to selenize certain materials can transform certain elements or compounds into selenides with specific structures and properties, making selenization a crucial process in material preparation.

[0003] Before using a tubular furnace to carry out a selenization reaction on certain materials, it is necessary to first evacuate the interior of the glass tank of the tubular furnace into a vacuum state, and then fill the glass tank with nitrogen. However, the glass tank of the existing tubular furnace is only connected to a pressure gauge and a manual valve through a connecting pipe. When nitrogen is inflated into the glass tank through an external pipeline, the pressure gauge reading must be observed in real time to prevent the glass tank from bursting due to excessive pressure of the nitrogen. Therefore, during the inflation process, the operator must keep a close eye on the pressure gauge reading in real time to quickly close the manual valve when the pressure gauge reaches the specified pressure reading. The degree of automation is poor and the use is relatively inconvenient. Therefore, we propose an anti-overfilling safety protection device for a selenization furnace to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In response to the problems existing in the prior art, the purpose of the present utility model is to provide an anti-overfilling safety protection device for a selenization furnace. It adds an anti-overfilling valve connected between the air supply pipe and the manual valve, which has the effect of automatically closing after the nitrogen pressure reaches a set value, blocking the air supply pipe from continuing to inflate the interior of the glass tank through the manual valve, so that even if the operator fails to close the manual valve in time, the anti-overfilling valve can still block the inflation gas source in time, thereby avoiding the phenomenon of overfilling and explosion of the glass tank, and improving the safety and automation level during use.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] An anti-overcharging safety protection device for a selenization furnace comprises an anti-overcharging valve, a manual valve, a pressure gauge and a tubular furnace are sequentially arranged on one side of the anti-overcharging valve;

[0009] The anti-overfill valve includes a bottom shell, an air pressure chamber is opened inside the bottom shell, a damper plate is fixedly attached to the top of the inner edge of the air pressure chamber, a support spring is provided on the top of the damper plate, the top and bottom of the support spring are respectively engaged with an upper cover plate and a lower cover plate, the bottom of the lower cover plate is in contact with the top of the damper plate, the top of the bottom shell is fixedly mounted with the upper shell by screws, and a connecting pile is fixedly welded at the center position of the top of the upper shell, an adjusting screw is provided inside the connecting pile, and a screw handle and a pressing piece are fixedly mounted on the top and bottom of the adjusting screw, respectively, and the bottom of the pressing piece is in contact with the top of the upper cover plate;

[0010] An air inlet end and an air outlet end are respectively provided at both ends of the bottom shell. An exhaust convex hole connected to the interior of the air inlet end is opened inside the air pressure chamber, and the air outlet end is connected to the interior of the air pressure chamber. A group of shaft seats are fixedly connected to the interior of the air pressure chamber, and a floating part is rotatably connected between the shaft seats of the group through a pin shaft. A sealing plug is fixedly attached to the bottom of one end of the floating part, and the bottom of the sealing plug is in contact with the top of the exhaust convex hole. A connecting part is sleeved on the other end of the floating part, and the cylindrical section on the top of the connecting part is fixedly plugged into the socket at the center position of the damper plate.

[0011] Furthermore, the adjusting screw is provided with an external thread section and a smooth section, the smooth section is sleeved with a sealing ring, the inner wall of the connecting pile is provided with an internal thread section and a clamping section, the external thread section is threadedly connected to the inner wall of the internal thread section, and the outer wall of the sealing ring is fixedly adhered to the inner wall of the clamping section.

[0012] Furthermore, the two ends of the manual valve are fixedly connected with connecting pipe 1 and connecting pipe 2 respectively, one end of the connecting pipe 1 is fixedly connected to the air outlet end, and the air inlet end is fixedly connected with the air supply pipe.

[0013] Furthermore, a glass tank body is provided inside the tubular furnace, and metal end plates are fixedly installed at both ends of the glass tank body, one of the metal end plates is fixedly connected to a connecting pipe three, and the bottom of the pressure gauge is fixedly connected to one end of the connecting pipe two and one end of the connecting pipe three through a tee.

[0014] Furthermore, a connecting pipe four is fixedly connected to the other metal end plate, and a switching control valve is fixedly installed on the end of the connecting pipe four.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] This solution, by adding an anti-overfill valve connected between the air supply pipe and the manual valve, has the effect of automatically closing after the nitrogen pressure reaches the set value, blocking the air supply pipe from continuing to inflate the glass tank through the manual valve. Even if the operator fails to close the manual valve in time, the anti-overfill valve can still block the inflation gas source in time, avoiding the phenomenon of overfilling and explosion of the glass tank, and improving the safety and automation level during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 Schematic diagram of the enlarged structure of the local area;

[0020] Figure 3 This is a schematic diagram of the disassembled structure of the anti-overfilling valve of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the adjusting screw of the utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the bottom shell of the present utility model.

[0023] Description of the numbers in the figure:

[0024] 1. Anti-overfill valve; 2. Bottom shell; 201. Air pressure chamber; 202. Air inlet; 203. Air outlet; 204. Exhaust convex hole; 205. Shaft seat; 3. Shock absorber; 4. Support spring; 5. Upper cover; 6. Lower cover; 7. Upper shell; 701. Connecting pile; 8. Adjusting screw; 9. Twist handle; 10. Pressing piece; 11. Pin; 12. Floating piece; 13. Sealing plug; 14. Connecting piece; 15. Sealing ring;

[0025] 16. Manual valve; 17. Pressure gauge; 18. Tubular furnace; 1801. Glass tank; 1802. Metal end plate; 19. Connecting pipe 1; 20. Connecting pipe 2; 21. Gas supply pipe; 22. Connecting pipe 3; 23. Tee; 24. Connecting pipe 4. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the specification of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0027] Example 1:

[0028] See also Figure 3 and Figure 4 , an anti-overcharging safety protection device for a selenization furnace, comprising an anti-overcharging valve 1, a manual valve 16, a pressure gauge 17 and a tubular furnace 18 are sequentially arranged on one side of the anti-overcharging valve 1;

[0029] The anti-overfill valve 1 includes a bottom shell 2, which defines an air pressure chamber 201. A damper plate 3 is fixedly attached to the top of the inner edge of the air pressure chamber 201. A support spring 4 is provided on the top of the damper plate 3. The top and bottom of the support spring 4 are respectively engaged with an upper cover plate 5 and a lower cover plate 6. The bottom of the lower cover plate 6 contacts the top of the damper plate 3. The top of the bottom shell 2 is fixedly mounted with an upper shell 7 via screws, and a connecting post 701 is fixedly welded at the center of the top of the upper shell 7. An adjusting screw 8 is provided inside the connecting post 701, and a knob 9 and a pressing plate 10 are fixedly mounted on the top and bottom of the adjusting screw 8, respectively. The bottom of the pressing plate 10 contacts the top of the upper cover plate 5.

[0030] An air inlet 202 and an air outlet 203 are respectively provided at both ends of the bottom shell 2. An exhaust convex hole 204 communicating with the interior of the air inlet 202 is opened inside the air pressure chamber 201, and the air outlet 203 is communicated with the interior of the air pressure chamber 201. A set of shaft seats 205 are fixedly connected to the interior of the air pressure chamber 201, and a floating member 12 is rotatably connected between the shaft seats 205 via a pin 11. A sealing plug 13 is fixedly attached to the bottom of one end of the floating member 12, and the bottom of the sealing plug 13 contacts the top of the exhaust convex hole 204. A connecting member 14 is sleeved on the other end of the floating member 12, and the cylindrical section at the top of the connecting member 14 is fixedly plugged into the socket at the center of the damper plate 3.

[0031] The adjusting screw 8 is provided with an external thread section and a smooth section, and a sealing ring 15 is sleeved on the smooth section. The inner wall of the connecting pile 701 is provided with an internal thread section and a clamping section. The external thread section is connected to the internal thread of the internal thread section, and the outer wall of the sealing ring 15 is fixedly pasted to the inner wall of the clamping section.

[0032] (1) The pressure test and pressure calibration adjustment principle of this anti-overfill valve is:

[0033] First, a pressure test and calibration device for the anti-overfill valve 1 is assembled using the anti-overfill valve 1, a corresponding number of pipes, a pressure gauge, and a gas cylinder. This allows external gas to enter the gas cylinder through the anti-overfill valve 1, the corresponding pipes, and the pressure gauge. Further inflation is stopped when the pressure gauge reading reaches the standard pressure value of the glass cylinder body 1801.

[0034] During this process, if the anti-overfill valve 1 reaches the closed state prematurely, it means that the pressure value of the anti-overfill valve 1 is lower than the standard pressure value of the glass tank body 1801. At this time, the adjusting screw 8 can be rotated by turning the hand 9 to move the pressure plate 10 downward. Then, the downward pressure on the damper plate 3 is increased by connecting the support spring 4 and the lower cover plate 6 until the pressure gauge reading just reaches the standard pressure value of the glass tank body 1801 and the anti-overfill valve 1 is instantly closed to block the airflow. At this time, the adjustment and calibration process of the anti-overfill valve 1 is completed.

[0035] If the pressure gauge reading exceeds the standard pressure value of the glass tank body 1801 and the anti-overfilling valve 1 has not been closed in time to block the airflow, it means that the pressure value of the anti-overfilling valve 1 is greater than the standard pressure value of the glass tank body 1801. At this time, the adjusting screw 8 can be rotated in the opposite direction by twisting the hand 9 to cause the pressure piece 10 to move upward, and then the downward pressure on the damping plate 3 is reduced by the connection between the support spring 4 and the lower cover plate 6 until the pressure gauge reading just reaches the standard pressure value of the glass tank body 1801 and the anti-overfilling valve 1 is instantly closed to block the airflow. At this time, the adjustment and calibration process of the anti-overfilling valve 1 is completed.

[0036] Example 2:

[0037] In view of the above embodiment 1, for further description, refer to Figure 1-Figure 5 The two ends of the manual valve 16 are respectively fixedly connected with a connecting pipe 19 and a connecting pipe 2 20, one end of the connecting pipe 19 is fixedly connected to the gas outlet end 203, and the gas inlet end 202 is fixedly connected to the gas supply pipe 21. A glass tank body 1801 is provided inside the tube furnace 18, and metal end plates 1802 are fixedly installed at both ends of the glass tank body 1801, one of the metal end plates 1802 is fixedly connected to a connecting pipe 3 22, and the bottom of the pressure gauge 17 is fixedly connected to one end of the connecting pipe 2 20 and one end of the connecting pipe 3 22 through a tee 23, and a connecting pipe 4 24 is fixedly connected to the other metal end plate 1802, and a transfer control valve is fixedly installed on the end of the connecting pipe 4 24.

[0038] (2) The working principle of the device is:

[0039] After the calibrated and adjusted anti-overfill valve 1 described in Example 1 is assembled and connected as shown in the figure, nitrogen gas from the outside can enter the anti-overfill valve 1 through the gas supply pipe 21, and then enter the glass container 1801 through the connecting pipe 1 19, the manual valve 16, the connecting pipe 2 20, the tee 23, and the connecting pipe 3 22 in sequence.

[0040] During the inflation process, the pressure value inside the glass tank body 1801 gradually increases, and at the same time, the pressure inside the air pressure chamber 201 of the anti-overfilling valve 1 gradually increases. When the pressure inside the air pressure chamber 201 is slightly greater than the supporting force of the support spring 4, the damper plate 3 is deformed and bulges upward. Then the damper plate 3 pulls the connecting piece 14 upward and simultaneously lifts the other end of the floating piece 12 upward. At this time, the floating piece 12 drives one end of the floating piece 12 downward through the rotation connection of the pin shaft 11, prompting the sealing plug 13 to fit tightly against the top of the exhaust convex hole 204, preventing nitrogen from continuing to flow into the air pressure chamber 201 through the air inlet end 202 and the exhaust convex hole 204, thereby making the anti-overfilling valve 1 close and block the continued filling of nitrogen, thereby improving the safety of use.

[0041] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An anti-overfill safety device for a selenization furnace, comprising an anti-overfill valve (1), characterized in that: A manual valve (16), a pressure gauge (17) and a tubular furnace (18) are sequentially provided on one side of the anti-overfill valve (1); The anti-overfill valve (1) includes a bottom shell (2), an air pressure chamber (201) is provided inside the bottom shell (2), a spring plate (3) is fixedly attached to the top of the inner edge of the air pressure chamber (201), a support spring (4) is provided on the top of the spring plate (3), the top and bottom of the support spring (4) are respectively engaged with an upper cover plate (5) and a lower cover plate (6), the bottom of the lower cover plate (6) is in contact with the top of the spring plate (3), the top of the bottom shell (2) is fixedly mounted with an upper shell (7) by screws, and a connecting pile (701) is fixedly welded at the center position of the top of the upper shell (7), an adjusting screw (8) is provided inside the connecting pile (701), and a screw handle (9) and a pressing plate (10) are respectively fixedly mounted on the top and bottom of the adjusting screw (8), and the bottom of the pressing plate (10) is in contact with the top of the upper cover plate (5); The bottom shell (2) is provided with an air inlet end (202) and an air outlet end (203) at both ends, and an exhaust convex hole (204) communicating with the interior of the air inlet end (202) is provided inside the air pressure chamber (201), and the air outlet end (203) is communicated with the interior of the air pressure chamber (201). A group of shaft seats (205) are fixedly connected inside the air pressure chamber (201), and a floating member (12) is rotatably connected between the shaft seats (205) through a pin shaft (11). A sealing plug (13) is fixedly attached to the bottom of one end of the floating member (12), and the bottom of the sealing plug (13) is in contact with the top of the exhaust convex hole (204). The other end of the floating member (12) is sleeved with a connecting member (14), and the cylindrical section at the top of the connecting member (14) is fixedly plugged into the socket at the center position of the elastic wave plate (3).

2. The anti-overcharging safety protection device for a selenization furnace according to claim 1, characterized in that: The adjusting screw (8) is provided with an external thread section and a smooth section, the smooth section is sleeved with a sealing ring (15), the inner wall of the connecting pile (701) is provided with an internal thread section and a clamping section, the external thread section is threadedly connected to the inner wall of the internal thread section, and the outer wall of the sealing ring (15) is fixedly adhered to the inner wall of the clamping section.

3. The anti-overcharging safety protection device for a selenization furnace according to claim 1, characterized in that: The two ends of the manual valve (16) are respectively fixedly connected to a connecting pipe 1 (19) and a connecting pipe 2 (20), one end of the connecting pipe 1 (19) is fixedly connected to the air outlet end (203), and the air inlet end (202) is fixedly connected to an air supply pipe (21).

4. The anti-overcharging safety protection device for a selenization furnace according to claim 3, characterized in that: A glass tank body (1801) is provided inside the tube furnace (18), and metal end plates (1802) are fixedly installed at both ends of the glass tank body (1801), one of the metal end plates (1802) is fixedly connected to a third connecting pipe (22), and the bottom of the pressure gauge (17) is fixedly connected to one end of the second connecting pipe (20) and one end of the third connecting pipe (22) through a tee (23).

5. The anti-overcharging safety protection device for a selenization furnace according to claim 4, characterized in that: A connecting pipe four (24) is fixedly connected to the other metal end plate (1802), and a switching control valve is fixedly installed on the end of the connecting pipe four (24).

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