Safety valve for molecular distillation equipment

Abstract

The utility model discloses a safety valve for molecular distillation equipment, which relates to the technical field of safety valves, and comprises a valve cover, the bottom end of the valve cover is fixedly communicated with a valve seat, the bottom end of the valve seat is fixedly communicated with an air inlet pipe, one side of the valve seat is fixedly communicated with an air exhaust pipe, the outer wall of the air inlet pipe is provided with a mounting groove, and the air exhaust pipe is fixedly communicated with the mounting groove. A mounting groove is formed in the inner wall of the valve head, a sealing cover plate is movably connected to the inner wall of the mounting groove, second connecting plates are arranged on the two sides of the mounting groove, and the second connecting plates are fixedly connected to the outer wall of the air inlet pipe. When the pressure is normal, the valve head is controlled to reset by utilizing the elastic force of the spring and is closed with the sealing gasket to keep sealing, so that a very good protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a safety valve used in molecular distillation equipment. Background Art

[0002] Molecular distillation equipment is a liquid-liquid separation device. Since the distance between its evaporation surface and condensation surface is very short, it is also called short-path distillation equipment. It is precisely because of this special design that the pressure inside the equipment system is minimized, thereby achieving a very high vacuum degree. It is precisely because the vacuum degree inside the equipment system is very high that it is very difficult to increase the interface.

[0003] However, in the existing technology, since the vacuum pump is basically three-phase electricity, the motor may rotate forward and reverse. It is normal for the forward rotating motor to draw negative pressure into the system, but if the motor reverses, the vacuum pump will provide positive pressure to the equipment. The existence of positive pressure will not only fracture the seals of all interfaces of the equipment, but may also cause safety accidents due to excessive positive pressure. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that if the motor is reversed, the vacuum pump will provide positive pressure to the equipment. The existence of positive pressure will not only fracture the seals of all interfaces of the equipment, but may also cause safety accidents due to excessive positive pressure. A safety valve for use in molecular distillation equipment is proposed to solve the problem that

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a safety valve for use in molecular distillation equipment, comprising a valve cover, the bottom end of the valve cover is fixedly connected to a valve seat, the bottom end of the valve seat is fixedly connected to an air intake pipe, one side of the valve seat is fixedly connected to an exhaust pipe, the outer wall of the air intake pipe is provided with a mounting groove, the inner wall of the mounting groove is movably connected to a sealing cover plate, connecting plates 2 are provided on both sides of the mounting groove, the connecting plate 2 is fixedly connected to the outer wall of the air intake pipe, the sealing cover plate is fixedly connected to connecting plate 1 on both sides, a bolt and nut assembly is connected between the connecting plate 1 and the connecting plate 2, the inner wall of the sealing cover plate is fixedly connected to a filter screen, the inner wall of the air intake pipe is provided with a limiting groove, and one end of the filter screen is inserted into the inner wall of the limiting groove.

[0006] Preferably, the upper outer wall of the valve cover is fixedly connected to a fixed block, and the top end of the fixed block is rotatably connected to a control rod. Through the setting of the control rod, the user can manually control the control rod to pull the valve stem in an emergency, thereby controlling the valve head to separate from the sealing gasket, thereby achieving manual pressure relief.

[0007] Preferably, the top surface of the fixed block passes through a fixedly connected limit seat, the center of the top surface of the limit seat passes through a movably connected valve stem, and the top end of the valve stem is rotatably connected to the middle inner wall of the control rod, so as to facilitate manual control of the control rod to lift the valve stem to control the valve head and separate the sealing gasket.

[0008] Preferably, a spring is provided inside the valve cover, and the spring is movably sleeved on the outer wall of the valve stem.

[0009] Preferably, the top end of the spring is fixedly connected to the outer wall of the limit seat, the bottom end of the spring is fixedly connected to the limit plate, and the limit plate is fixedly sleeved on the outer wall of the valve stem. When the pressure is normal, the elastic force of the spring is used to control the valve head to reset and the sealing gasket to close and maintain the seal.

[0010] Preferably, the bottom end of the valve stem is fixedly connected to a valve head, and a communication port is provided on the inner wall of the valve seat.

[0011] Preferably, a sealing gasket is fixedly connected to the inner wall of the communication port, and the valve head is movably connected to the inner wall of the sealing gasket. The provision of the sealing gasket facilitates maintaining sealing at the valve head connection.

[0012] Preferably, outer walls on both sides of the valve cover are fixedly connected with outer guard plates.

[0013] Preferably, one end of the exhaust pipe is fixedly connected to an exhaust flange.

[0014] Preferably, the bottom end of the air inlet pipe is fixedly connected with an air inlet flange.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. In the present invention, by installing the present invention on the vacuum pipeline of the molecular distillation equipment, when positive pressure occurs, the pressure in the pipeline is greater than the pressure on the top of the valve head, so that the valve head is lifted by the bottom pressure, so that the exhaust pipe and the intake pipe are connected to complete automatic pressure relief. When the pressure is normal, the elastic force of the spring is used to control the valve head to return to its original position and the sealing gasket to close and maintain the seal, thereby achieving a good protection effect.

[0017] 2. In the present invention, the filter installed in the air intake pipe is used to filter the passing gas during the pressure relief process, thereby filtering out solid particles and impurities in the material to prevent them from entering the interior of the present invention and causing blockage, thereby ensuring the stable operation of the present invention. Through the setting of the bolt and nut assembly, it is convenient for the user to regularly remove the sealing cover from one side of the air intake pipe, thereby pulling out the filter and cleaning it to ensure its filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The utility model provides a three-dimensional structural diagram of a safety valve used in molecular distillation equipment;

[0019] Figure 2 This utility model proposes a safety valve for molecular distillation equipment Figure 1 A magnified view of the structure at center A;

[0020] Figure 3 The utility model provides a schematic diagram of the internal structure of a safety valve used in molecular distillation equipment;

[0021] Figure 4 This utility model proposes a safety valve for molecular distillation equipment Figure 3 A magnified view of the structure at point B in the middle;

[0022] Figure 5 The utility model provides a structural explosion diagram of a safety valve inlet pipe used in molecular distillation equipment.

[0023] Legend: 1. Valve cover; 11. Fixing block; 12. Control rod; 13. Outer guard plate; 14. Valve stem; 15. Spring; 16. Limit seat; 17. Limit plate; 18. Valve head; 2. Valve seat; 21. Connecting port; 22. Sealing gasket; 3. Inlet pipe; 31. Inlet flange; 32. Mounting groove; 33. Connecting plate 1; 34. Connecting plate 2; 35. Bolt and nut assembly; 36. Sealing cover plate; 37. Filter screen; 38. Limit groove; 4. Exhaust pipe; 41. Exhaust flange. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1: Figure 1 - Figure 5As shown, the utility model provides a safety valve for use in molecular distillation equipment, including a valve cover 1, the bottom end of the valve cover 1 is fixedly connected to a valve seat 2, the bottom end of the valve seat 2 is fixedly connected to an air intake pipe 3, one side of the valve seat 2 is fixedly connected to an exhaust pipe 4, the outer wall of the air intake pipe 3 is provided with a mounting groove 32, the inner wall of the mounting groove 32 is movably connected to a sealing cover plate 36, both sides of the mounting groove 32 are provided with a connecting plate 2 34, the connecting plate 2 34 is fixedly connected to the outer wall of the air intake pipe 3, both sides of the sealing cover plate 36 are fixedly connected to a connecting plate 1 33, a bolt and nut assembly 35 is connected between the connecting plate 1 33 and the connecting plate 2 34, the inner wall of the sealing cover plate 36 is fixedly connected to a filter screen 37, the inner wall of the air intake pipe 3 is provided with a limiting groove 38, one end of the filter screen 37 is inserted into the inner wall of the limiting groove 38, one end of the exhaust pipe 4 is fixedly connected to an exhaust flange 41, and the bottom end of the air intake pipe 3 is fixedly connected to the air intake flange 31.

[0027] The following is a detailed description of the specific settings and functions of this embodiment. During the pressure relief process, the filter 37 installed in the air inlet pipe 3 is used to filter the passing gas, thereby filtering out solid particles and impurities in the material to prevent them from entering the interior of the utility model and causing blockage, thereby ensuring the stable operation of the utility model. Through the setting of the bolt and nut assembly 35, it is convenient for the user to regularly remove the sealing cover 36 from one side of the air inlet pipe 3, so as to pull out the filter 37 and clean it to ensure its filtering effect. Through the setting of the air inlet flange 31 and the exhaust flange 41, it is convenient to install the air inlet pipe 3 on the vacuum pipe of the molecular distillation equipment, and at the same time connect the exhaust pipe 4 to the external pipe to collect exhaust gas.

[0028] Example 2: Figure 1 - Figure 5 As shown, the upper outer wall of the valve cover 1 is fixedly connected to a fixed block 11, and the top of the fixed block 11 is rotatably connected to the control rod 12. The top surface of the fixed block 11 passes through a fixedly connected limit seat 16, and the center of the top surface of the limit seat 16 passes through a movably connected valve stem 14. The top end of the valve stem 14 is rotatably connected to the middle inner wall of the control rod 12. A spring 15 is provided inside the valve cover 1, and the spring 15 is movably sleeved on the outer wall of the valve stem 14. The top end of the spring 15 is fixedly connected to the outer wall of the limit seat 16, and the bottom end of the spring 15 is fixedly connected to the limit plate 17. The limit plate 17 is fixedly sleeved on the outer wall of the valve stem 14, and the bottom end of the valve stem 14 is fixedly connected to the valve head 18. A connecting port 21 is provided on the inner wall of the valve seat 2, and a sealing gasket 22 is fixedly connected to the inner wall of the connecting port 21. The valve head 18 is movably connected to the inner wall of the sealing gasket 22. The outer walls on both sides of the valve cover 1 are fixedly connected to the outer guard plate 13.

[0029] The effect achieved by the entire embodiment is that, by installing the utility model on the vacuum pipeline of the molecular distillation equipment, when a positive pressure situation unexpectedly occurs in the vacuum pipeline of the molecular distillation equipment, due to the sharp increase in the internal pressure of the pipeline, its value is greater than the pressure borne by the top of the valve head 18, under the action of this pressure difference, the bottom of the valve head 18 will be subjected to a strong lifting force, thereby overcoming other resistances and starting to move upward. As the valve head 18 rises, the channel between the exhaust pipe 4 and the intake pipe 3 is gradually opened, so that the excessive pressure in the pipeline can be smoothly discharged through the exhaust pipe 4, thereby automatically completing the pressure relief process, effectively avoiding a series of safety accidents that may be caused by excessive pressure, and providing reliable protection for the stable operation of the molecular distillation equipment. By setting the sealing gasket 22, it is convenient to maintain the sealing of the connection of the valve head 18, and when the valve head 18 contacts the connection part, it can fully fill the small gap between the two, greatly enhancing the sealing of the connection of the valve head 18. Whether in the recovery process after positive pressure relief or during the long-term normal operation of the equipment, the sealing gasket 22 can consistently maintain good sealing performance, effectively reducing energy loss and vacuum drop caused by poor sealing. Through the setting of the control rod 12, the user can manually control the control rod 12 to pull the valve stem 14 in an emergency, thereby controlling the valve head 18 to separate from the sealing gasket 22, thereby achieving manual pressure relief. The manual pressure relief function provides an additional safeguard for the safe operation of the molecular distillation equipment, so that in various complex situations, the pressure in the pipeline can be controlled in a timely and effective manner, further improving the overall safety and reliability of the equipment.

[0030] The method of use and working principle of this device: When in use, the user installs the air inlet pipe 3 on the vacuum pipe of the molecular distillation equipment through the air inlet flange 31, and at the same time connects the exhaust pipe 4 to the external pipe to collect exhaust gas. When positive pressure occurs, the pressure in the pipe is greater than the pressure on the top of the valve head 18, so that the valve head 18 is lifted by the bottom pressure, so that the exhaust pipe 4 is connected with the air inlet pipe 3 to complete automatic pressure relief. When the pressure is normal, the elastic force of the spring 15 is used to control the valve head 18 to reset and close the sealing gasket 22 to maintain the seal, thereby achieving a good protection effect. During the pressure relief process, the filter screen 37 installed in the air inlet pipe 3 is used to filter the passing gas, thereby filtering out solid particles and impurities in the material to prevent them from entering the interior of the utility model and causing blockage, thereby ensuring the stable operation of the utility model. Through the setting of the bolt and nut assembly 35, it is convenient for the user to regularly remove the sealing cover plate 36 from one side of the air inlet pipe 3, so as to pull out the filter screen 37 and clean it to ensure its filtering effect.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A safety valve for use in molecular distillation equipment, comprising a valve cover (1), characterized in that: The bottom end of the valve cover (1) is fixedly connected to a valve seat (2), the bottom end of the valve seat (2) is fixedly connected to an air intake pipe (3), one side of the valve seat (2) is fixedly connected to an exhaust pipe (4), an outer wall of the air intake pipe (3) is provided with a mounting groove (32), an inner wall of the mounting groove (32) is movably connected to a sealing cover plate (36), both sides of the mounting groove (32) are provided with a second connecting plate (34), the second connecting plate (34) is fixedly connected to the outer wall of the air intake pipe (3), both sides of the sealing cover plate (36) are fixedly connected to a first connecting plate (33), a bolt and nut assembly (35) is connected between the first connecting plate (33) and the second connecting plate (34), the inner wall of the sealing cover plate (36) is fixedly connected to a filter screen (37), a limiting groove (38) is provided on the inner wall of the air intake pipe (3), and one end of the filter screen (37) is plugged into the inner wall of the limiting groove (38).

2. A safety valve for molecular distillation equipment according to claim 1, characterized in that: The upper outer wall of the valve cover (1) is fixedly connected to a fixing block (11), and the top end of the fixing block (11) is rotatably connected to a control rod (12).

3. A safety valve for molecular distillation equipment according to claim 2, characterized in that: The top surface of the fixed block (11) passes through a fixedly connected limit seat (16), the center of the top surface of the limit seat (16) passes through a movably connected valve stem (14), and the top end of the valve stem (14) is rotatably connected to the middle inner wall of the control rod (12).

4. A safety valve for molecular distillation equipment according to claim 3, characterized in that: A spring (15) is provided inside the valve cover (1), and the spring (15) is movably sleeved on the outer wall of the valve stem (14).

5. A safety valve for molecular distillation equipment according to claim 4, characterized in that: The top end of the spring (15) is fixedly connected to the outer wall of the limiting seat (16), and the bottom end of the spring (15) is fixedly connected to the limiting plate (17), and the limiting plate (17) is fixedly sleeved on the outer wall of the valve stem (14).

6. A safety valve for molecular distillation equipment according to claim 5, characterized in that: The bottom end of the valve stem (14) is fixedly connected to a valve head (18), and the inner wall of the valve seat (2) is provided with a communication port (21).

7. A safety valve for molecular distillation equipment according to claim 6, characterized in that: The inner wall of the communication port (21) is fixedly connected with a sealing gasket (22), and the valve head (18) is movably connected to the inner wall of the sealing gasket (22).

8. The safety valve for molecular distillation equipment according to claim 1, characterized in that: The outer walls on both sides of the valve cover (1) are fixedly connected with outer guard plates (13).

9. The safety valve for molecular distillation equipment according to claim 1, characterized in that: One end of the exhaust pipe (4) is fixedly connected to an exhaust flange (41).

10. The safety valve for molecular distillation equipment according to claim 1, characterized in that: The bottom end of the air intake pipe (3) is fixedly connected to an air intake flange (31).

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