Extremely low temperature adjusting needle valve

Abstract

The invention provides an extremely low temperature adjusting needle valve, and belongs to the technical field of low temperature valves, the extremely low temperature adjusting needle valve comprises a needle valve, a first conveying channel is reserved on the needle valve, the first conveying channel is communicated with a connecting block, ring blocks are movably connected in pairs in the connecting block, two ends of each ring block are fixedly connected with a spiral beryllium copper wire, a through hole is reserved on each ring block, and the through hole is communicated with the first conveying channel. A storage opening is reserved in the end, close to the outer portion of the connecting block, of the ring block, and a first flow guide channel is formed in the upper end of the storage opening. The problems that in the stage that an existing extremely-low-temperature adjusting needle valve is connected with a second conveying channel to convey fluid, the size of the second conveying channel is likely to be increased or decreased due to the temperature factor, a gap is generated between the second conveying channel and a containing opening, and the fluid conveying efficiency of the extremely-low-temperature adjusting needle valve and the second conveying channel is reduced are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cryogenic valves, and in particular relates to an extremely low temperature regulating needle valve. Background Art

[0002] The needle valve is a fine-tuning valve with a needle-shaped valve plug, which is used to adjust the gas flow. In the cryogenic system, there is usually a need to transport 4He or 3He fluid into the container, and a flow control needle valve is required.

[0003] When the existing cryogenic regulating needle valve is connected to the transport channel 2 to transport fluid, the volume of the transport channel 2 is easily expanded or reduced due to temperature factors, resulting in a gap between the transport channel 2 and the receiving port, thereby reducing the fluid transport efficiency of the cryogenic regulating needle valve and the transport channel 2. Summary of the invention

[0004] The present invention provides an extremely low temperature regulating needle valve, which aims to solve the problem that when the existing extremely low temperature regulating needle valve is connected to the transport channel 2 to transport fluid, the transport channel 2 is easily expanded or reduced in volume due to temperature factors, resulting in a gap between the transport channel 2 and the receiving port, thereby reducing the fluid transport efficiency of the extremely low temperature regulating needle valve and the transport channel 2.

[0005] The embodiment of the present invention provides an extremely low temperature regulating needle valve, comprising a needle valve, a transport channel 1 is reserved on the needle valve, the transport channel 1 is connected to a connecting block, the connecting block has ring blocks arranged in pairs in a movable manner, the two ends of the ring blocks are fixedly connected to spiral beryllium copper wires, a through opening is reserved on the ring block, a receiving opening is reserved at the end of the ring block closer to the outside of the connecting block, a guide channel 1 is arranged above the receiving opening, a guide channel 2 is arranged below the receiving opening, the guide channel 1 and the guide channel 2 at the ends closer to the receiving opening are fixedly connected to the connecting block, and the guide channel 1 is fixedly connected to the connecting block. Connected to the elastic cover, the confluence point of the guide channel one and the guide channel two is connected to the guide channel three, the upper end of the circle block is fixedly connected to the guide tube, the guide tube is threadedly connected to the lead screw, a placement port is reserved on the connecting block, one end of the placement port is recorded with a ruler, protrusions are fixedly connected to the side walls at both ends of the connecting block, the protrusions are spirally connected, the protrusions are threadedly connected to the connecting cover, the connecting cover is fixedly connected to the circle sheet, the connecting block is provided with the transport channel two, the transport channel two on the connecting block that is closer to the needle valve is fixedly connected to the transport channel one.

[0006] The receiving opening faces the two ends of the connecting block, and the bottom wall surface of the receiving opening is inclined.

[0007] The guide channel 1 and the guide channel 2 are arranged in the ring block, and the guide channel 1 and the guide channel 2 are filled with fluid.

[0008] The three diversion channels extend into the diversion tube, and the diversion tube is movably connected to the placement opening.

[0009] The lower end of the lead screw is fixedly connected to a plug, and the plug is movably connected to the guide tube.

[0010] The ring piece is in a trumpet shape and is located between the second transport channel and the connecting block.

[0011] The beneficial effects of the present invention are:

[0012] 1. The present invention raises and lowers the plug by rotating the lead screw, so as to adjust the fluid pressure in the guide channel 1 and the guide channel 2. By installing the ring block, the receiving port, the guide channel 1 and the guide channel 2 in the connecting block, when the volume of the transport channel 2 is expanded or reduced due to temperature factors, the ring block moves in the connecting block, and the fluid pressure in the guide channel 1 and the guide channel 2 remains unchanged, so as to prevent the pulling between the transport channel 2 and the connecting block, and to facilitate the blocking of the gap between the transport channel 2 and the receiving port.

[0013] 2. The present invention facilitates close contact with the transport channel 2 through the ring piece, thereby enhancing the stability of the installation of the transport channel 2. The transport channel 2 is installed in the connecting block. When the guide tube follows the ring block to move in the placement port, the scale recorded on the placement port can be used to measure the volume change of the transport channel 2 caused by temperature factors, which is convenient for the subsequent maintenance of the connecting block and the transport channel 2.

[0014] 3. When the present invention adopts a low-temperature needle valve, the second delivery channel 28 on the connection block 2 that is closer to the needle valve 1 is fixedly connected to the first delivery channel 11, and the second delivery channel is probed into the connection block, and the second delivery channel is probed into the receiving port of the ring block, so that the second delivery channel is in contact with the inner wall surface of the receiving port, and the second delivery channel is loosened, and the fluid is filled into the first and second delivery channels through the guide tube and the third flow guide channel, and the elastic cover on the first and second flow guide channels is expanded to block the gap between the second delivery channel and the receiving port through the downward rotation of the lead screw, and then the connection cover is threaded to the two ends of the connection block, and is pressed against the second delivery channel through the ring piece to enhance the stability of the installation of the second delivery channel. In the stage where the second delivery channel is expanded in volume due to temperature factors, the elastic cover on the first and second flow guide channels is expanded to block the gap between the second delivery channel and the receiving port. The ring block is displaced toward the inside of the connecting block to squeeze the fluid in the guide channel one into the guide channel two, and the constant fluid pressure is used to maintain the sealing of the gap between the transport channel two and the receiving port. When the volume of the transport channel two decreases due to temperature factors, the ring block is displaced toward both ends to squeeze the fluid in the guide channel two into the guide channel one, so as to maintain the sealing of the transport channel two by the elastic cover to prevent the traction between the transport channel two and the connecting block, so as to seal the gap between the transport channel two and the receiving port. When the guide tube is displaced in the placement port following the ring block, the volume change of the transport channel two caused by temperature factors is measured through the ruler recorded on the placement port, so as to facilitate the subsequent maintenance of the connecting block and the transport channel two.

[0015] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a structural diagram of a needle valve according to an embodiment of the present invention;

[0018] Figure 2 It is a structural diagram of a connection block according to an embodiment of the present invention;

[0019] Figure 3 It is a structural diagram of a circle block of an embodiment of the present invention;

[0020] Figure 4 For the embodiment of the present invention Figure 3 The structural diagram at M;

[0021] Figure 5 It is a structural diagram of placing a port in an embodiment of the present invention.

[0022] Figure numerals: 1. needle valve; 11. transport channel one; 2. connecting block; 3. ring block; 4. spiral beryllium copper wire; 5. through opening; 6. storage opening; 7. flow guide channel one; 8. flow guide channel two; 9. elastic cover; 10. flow guide channel three; 21. flow guide tube; 22. lead screw; 23. placement opening; 24. ruler; 25. protrusion; 26. connecting cover; 27. ring piece; 28. transport channel two. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1-Figure 5The embodiment of the present invention provides an extremely low temperature regulating needle valve, comprising a needle valve 1, a transport channel 11 is reserved on the needle valve 1, the transport channel 11 is connected to a connecting block 2, a ring block 3 is movably connected in pairs in the connecting block 2, both ends of the ring block 3 are fixedly connected to a spiral beryllium copper wire 4, a through hole 5 is reserved on the ring block 3, and a receiving port 6 is reserved at one end of the ring block 3 closer to the outside of the connecting block 2, the receiving port 6 faces both ends of the connecting block 2, the bottom wall of the receiving port 6 is inclined, and the transport channel 28 is probed into the receiving port 6. , which is convenient for the transport channel 28 to contact the inner wall of the receiving port 6, the upper part of the receiving port 6 is provided with a guide channel 1 7, and the lower part of the receiving port 6 is provided with a guide channel 2 8, the guide channel 1 7 and the guide channel 2 8 are arranged in the ring block 3, and the guide channel 1 7 and the guide channel 2 8 are filled with fluid, and the fluid pressure in the guide channel 1 7 and the guide channel 2 8 rises, so that the volume of the elastic cover 9 is expanded, which is convenient for blocking the gap between the transport channel 2 28 and the receiving port 6, and the guide channel 1 7 and the guide channel 2 8 are fixed at the end closer to the receiving port 6 The elastic cover 9 is connected to the elastic cover 9, which is located in the receiving port 6. The confluence point of the guide channel 1 7 and the guide channel 2 8 is connected to the guide channel 3 10. The guide channel 3 10 is probed into the guide tube 21. The guide tube 21 is movably connected to the placement port 23. The fluid is easily introduced into the guide channel 1 7 and the guide channel 2 8 through the guide tube 21 and the guide channel 3 10. The upper end of the ring block 3 is fixedly connected to the guide tube 21. The guide tube 21 is threaded with the lead screw 22. The lower end of the lead screw 22 is fixedly connected to the plug, and the plug is movably connected to the guide tube 21. The plug is raised and lowered by rotating the lead screw 22, so as to adjust the fluid pressure in the guide channel 1 7 and the guide channel 2 8. The ring block 3, the receiving port 6, the guide channel 1 7 and the guide channel 2 8 are arranged in the connecting block 2. When the volume of the transport channel 2 28 expands or decreases due to temperature factors, the ring block 3 moves in the connecting block 2, and the fluid pressure in the guide channel 1 7 and the guide channel 2 8 remains unchanged, so as to prevent the pulling between the transport channel 2 28 and the connecting block 2, so as to block the gap between the transport channel 2 28 and the receiving port 6.

[0025] The connection block 2 is provided with a placement opening 23, the guide tube 21 is located in the placement opening 23, a ruler 24 is recorded on one end of the placement opening 23, a projection 25 is fixedly connected to the side walls at both ends of the connection block 2, the projection 25 is in a spiral shape, a connection cover 26 is connected to the projection 25, a ring piece 27 is fixedly connected to the connection cover 26, the ring piece 27 is in a trumpet shape, the ring piece 27 is located between the transport channel 28 and the connection block 2, and the ring piece 27 is convenient for close contact with the transport channel 28 to enhance the In order to ensure the stability of the installation of the second transport channel 28, the second transport channel 28 is installed in the connecting block 2. The second transport channel 28 on the connecting block 2 that is closer to the needle valve 1 is fixedly connected to the first transport channel 11. When the guide cylinder 21 follows the ring block 3 to move in the placement port 23, the ruler 24 recorded on the placement port 23 is used to measure the volume change of the second transport channel 28 caused by temperature factors, so as to facilitate the subsequent maintenance of the connecting block 2 and the second transport channel 28.

[0026] When a low-temperature needle valve is used, the transport channel 2 28 on the connection block 2 that is closer to the needle valve 1 is fixedly connected to the transport channel 1 11, and the transport channel 2 28 is probed into the connection block 2, and the transport channel 2 28 is probed into the receiving port 6 of the ring block 3, so that the transport channel 2 28 is in contact with the inner wall surface of the receiving port 6, and the transport channel 2 28 is loosened, and the fluid is filled into the guide channel 1 7 and the guide channel 2 8 through the guide tube 21 and the guide channel 3 10, and the elastic cover 9 on the guide channel 1 7 and the guide channel 2 8 is expanded to block the gap between the transport channel 2 28 and the receiving port 6 through the downward rotation of the lead screw 22, and then the connection cover 26 is threaded to the two ends of the connection block 2, and is closely attached to the transport channel 2 28 through the ring piece 27, so as to enhance the stability of the installation of the transport channel 2 28. In the stage where the volume of the transport channel 2 28 is expanded due to temperature factors, the ring piece 27 is pressed against the transport channel 2 28, and the stability of the installation of the transport channel 2 28 is enhanced. Block 3 is displaced toward the inside of the connecting block 2, and the fluid in the guide channel 1 7 is squeezed into the guide channel 2 8, and the constant fluid pressure is used to maintain the sealing of the gap between the transport channel 2 28 and the receiving port 6. When the volume of the transport channel 2 28 decreases due to temperature factors, the ring block 3 is displaced toward both ends, and the fluid in the guide channel 2 8 is squeezed into the guide channel 1 7, so as to maintain the sealing of the transport channel 2 28 by the elastic cover 9, so as to prevent the pulling between the transport channel 2 28 and the connecting block 2, so as to seal the gap between the transport channel 2 28 and the receiving port 6. When the guide tube 21 follows the ring block 3 to be displaced in the placement port 23, the volume change of the transport channel 2 28 caused by temperature factors is measured through the ruler 24 recorded on the placement port 23, so as to facilitate the subsequent maintenance of the connecting block 2 and the transport channel 2 28.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cryogenic regulating needle valve, comprising a needle valve (1), wherein a transport channel (11) is reserved on the needle valve (1), characterized in that: The transport channel 1 (11) is connected to a connection block (2), and the connection block (2) has a pair of ring blocks (3) movably connected thereto, and both ends of the ring blocks (3) are fixedly connected to spiral beryllium copper wires (4). A through hole (5) is reserved on the ring block (3), and a receiving opening (6) is reserved at the end of the ring block (3) closer to the outside of the connection block (2). A guide channel 1 (7) is arranged above the receiving opening (6), and a guide channel 2 (8) is arranged below the receiving opening (6). The ends of the guide channel 1 (7) and the guide channel 2 (8) closer to the receiving opening (6) are fixedly connected to an elastic cover (9), and the junction of the guide channel 1 (7) and the guide channel 2 (8) is connected to the guide channel. Channel three (10), the upper end of the ring block (3) is fixedly connected to a guide tube (21), the guide tube (21) is threadedly connected to a lead screw (22), a placement opening (23) is reserved on the connection block (2), one end of the placement opening (23) is recorded with a ruler (24), the side walls of both ends of the connection block (2) are fixedly connected to protrusions (25), the protrusions (25) are in a spiral shape, the protrusions (25) are threadedly connected to a connection cover (26), the connection cover (26) is fixedly connected to a ring sheet (27), a pair of transport channels (28) are arranged in the connection block (2), the transport channel (28) on the connection block (2) that is closer to the needle valve (1) is fixedly connected to the transport channel one (11).

2. The extremely low temperature regulating needle valve according to claim 1, characterized in that: The receiving opening (6) faces the two ends of the connecting block (2), and the bottom wall surface of the receiving opening (6) is inclined.

3. The extremely low temperature regulating needle valve according to claim 1, characterized in that: The flow guide channel 1 (7) and the flow guide channel 2 (8) are arranged in the ring block (3), and the flow guide channel 1 (7) and the flow guide channel 2 (8) are filled with fluid.

4. The extremely low temperature regulating needle valve according to claim 1, characterized in that: The guide channel three (10) extends into the guide tube (21), and the guide tube (21) is movably connected to the placement opening (23).

5. The extremely low temperature regulating needle valve according to claim 1, characterized in that The lower end of the lead screw (22) is fixedly connected to a plug, and the plug is movably connected to the guide tube (21).

6. The extremely low temperature regulating needle valve according to claim 1, characterized in that: The ring piece (27) is trumpet-shaped and is located between the second transport channel (28) and the connecting block (2).

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