An ultra-low temperature regulating needle valve

Abstract

The application provides an extremely low temperature regulating needle valve, and belongs to the technical field of low temperature valves. The extremely low temperature regulating needle valve comprises a needle valve, a transport channel one reserved on the needle valve, a connecting block connected to the transport channel one, a pair of ring blocks movably arranged in the connecting block, helical beryllium copper wires fixed to two ends of the ring blocks, a through hole reserved on the ring blocks, a receiving opening reserved at one end of the ring blocks close to the outside of the connecting block, and a flow guide channel one arranged at the upper end of the receiving opening. The application solves the problem that the existing extremely low temperature regulating needle valve is easy to cause the volume of the transport channel two to increase or decrease due to temperature factors during the stage of connecting the transport channel two to transport fluid, so that a gap is generated between the transport channel two and the receiving opening, and the fluid transport efficiency of the extremely low temperature regulating needle valve and the transport channel two is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cryogenic valve, and particularly relates to an ultra-low temperature regulating needle valve. BACKGROUND

[0002] The needle valve is a fine adjustment valve, and the valve plug is needle-shaped and used for regulating air flow. In a low-temperature system, there is usually a demand for transporting 4He or 3He fluid into a container, and a flow control needle valve needs to be used.

[0003] In the stage of connecting the existing ultra-low temperature regulating needle valve with a second transport channel to transport fluid, the second transport channel is prone to swelling or shrinking due to temperature factors, so that a gap is generated between the second transport channel and a receiving opening, and the fluid transport efficiency of the ultra-low temperature regulating needle valve and the second transport channel is reduced. SUMMARY

[0004] The present application provides an ultra-low temperature regulating needle valve, which aims to solve the problem that in the stage of connecting the existing ultra-low temperature regulating needle valve with a second transport channel to transport fluid, the second transport channel is prone to swelling or shrinking due to temperature factors, so that a gap is generated between the second transport channel and a receiving opening, and the fluid transport efficiency of the ultra-low temperature regulating needle valve and the second transport channel is reduced.

[0005] The present application provides an ultra-low temperature regulating needle valve, which aims to solve the problem that in the stage of connecting the existing ultra-low temperature regulating needle valve with a second transport channel to transport fluid, the second transport channel is prone to swelling or shrinking due to temperature factors, so that a gap is generated between the second transport channel and a receiving opening, and the fluid transport efficiency of the ultra-low temperature regulating needle valve and the second transport channel is reduced.

[0006] The receiving opening faces the two heads of the connecting block, and the bottom wall of the receiving opening is in an inclined shape.

[0007] The first and second flow guide channels are arranged in the ring block, and the first and second flow guide channels are filled with fluid.

[0008] The flow guide channel three reaches into the flow guide barrel, and the flow guide barrel is movably connected into the placing opening.

[0009] The lower head of the lead screw is fixedly connected with the plug, and the plug is movably connected into the flow guide barrel.

[0010] The ring piece is trumpet-shaped, and is arranged between the conveying channel two and the connecting block.

[0011] The present application has the following advantages:

[0012] 1. The plug is lifted by rotating the lead screw, so that the fluid pressure in the flow guide channel one and the flow guide channel two can be adjusted. The ring piece, the receiving opening, the flow guide channel one and the flow guide channel two are arranged in the connecting block. When the conveying channel two changes in volume due to temperature factors, the ring piece moves in the connecting block, the fluid pressure in the flow guide channel one and the flow guide channel two remains unchanged, the pulling force between the conveying channel two and the connecting block is prevented, and the gap between the conveying channel two and the receiving opening is blocked.

[0013] 2. The ring piece is arranged close to the conveying channel two, so that the stability of the conveying channel two is improved. The conveying channel two is arranged in the connecting block. When the flow guide barrel moves in the placing opening along with the ring piece, the scale recorded on the placing opening is used to measure the volume change of the conveying channel two caused by temperature factors, and the subsequent maintenance of the connecting block and the conveying channel two is facilitated.

[0014] 3. When using a low-temperature needle valve in this invention, the second transport channel 28, which is closer to the needle valve 1 on the connecting block 2, is fixedly connected to the first transport channel 11. The second transport channel is inserted into the connecting block and into the receiving opening of the ring block, so that the second transport channel is in contact with the inner wall of the receiving opening. The second transport channel is then released, and fluid is injected into the first and second transport channels through the guide tube and the third transport channel. By rotating the screw downwards, the elastic cover on the first and second transport channels increases in volume to seal the gap between the second transport channel and the receiving opening. The connecting cover is then threaded to both ends of the connecting block, and the ring is pressed tightly against the second transport channel to enhance the stability of the second transport channel installation. During the stage when the volume of the second transport channel increases due to temperature factors, The ring block is displaced towards the connecting block, squeezing the fluid in the first guide channel into the second guide channel. This constant fluid pressure helps to seal the gap between the second transport channel and the receiving port. During the phase where the volume of the second transport channel decreases due to temperature, the ring block is displaced to both ends, squeezing the fluid in the second guide channel into the first guide channel. This helps to maintain the elastic cover's seal on the second transport channel, preventing pull between the second transport channel and the connecting block, and facilitating the sealing of the gap between the second transport channel and the receiving port. During the phase where the guide cylinder, along with the ring block, displaces within the placement port, the volume change of the second transport channel due to temperature is measured using a scale recorded on the placement port, facilitating subsequent maintenance work on the connecting block and the second transport channel.

[0015] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

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

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

[0019] Figure 3 This is a structural diagram of the ring block according to an embodiment of the present invention;

[0020] Figure 4 This is an embodiment of the present invention. Figure 3 Structural diagram at point M;

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

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

[0023] In order to make the purpose, technical scheme and advantages of the technical scheme of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0024] REFERENCE Figures 1-5The embodiment of the present application provides a kind of low temperature regulating needle valve, including needle valve 1, needle valve 1 is reserved with transport channel one 11, transport channel one 11 is connected with coupling block 2, coupling block 2 is movably connected with the pair of ring block 3, the two heads of ring block 3 are fixed with spiral beryllium copper wire 4, ring block 3 is reserved with mouth 5, ring block 3 is reserved with receiving port 6 at the head close to the outside of coupling block 2, receiving port 6 faces the two heads of coupling block 2, the bottom wall surface of receiving port 6 is inclined, transport channel two 28 reaches the stage in receiving port 6, to facilitate the contact between transport channel two 28 and the wall of receiving port 6, the upper end of receiving port 6 is provided with flow channel one 7, the lower end of receiving port 6 is provided with flow channel two 8, flow channel one 7 and flow channel two 8 are arranged in ring block 3, flow channel one 7 and flow channel two 8 are filled with fluid, the fluid pressure in flow channel one 7 and flow channel two 8 rises, so that the volume of elastic cover 9 is increased, to facilitate the sealing of the gap between transport channel two 28 and receiving port 6, the head of flow channel one 7 and flow channel two 8 close to receiving port 6 is fixed with elastic cover 9, elastic cover 9 is in receiving port 6, the junction of flow channel one 7 and flow channel two 8 is connected with flow channel three 10, flow channel three 10 reaches flow guide cylinder 21, flow guide cylinder 21 is movably connected in placing port 23, fluid is introduced into flow channel one 7 and flow channel two 8 through flow guide cylinder 21 and flow channel three 10, the upper end of ring block 3 is fixed with flow guide cylinder 21, flow guide cylinder 21 is connected with lead screw 22, the lower end of lead screw 22 is fixed with plug, plug is movably connected in flow guide cylinder 21, the fluid pressure in flow channel one 7 and flow channel two 8 is adjusted by rotating lead screw 22 to make plug rise and fall, the installation of ring block 3, receiving port 6, flow channel one 7 and flow channel two 8 in coupling block 2, when the volume of transport channel two 28 is increased or decreased due to temperature factors, ring block 3 moves in coupling block 2, the fluid pressure in flow channel one 7 and flow channel two 8 does not change, to prevent the traction between transport channel two 28 and coupling block 2, to facilitate the sealing of the gap between transport channel two 28 and receiving port 6.

[0025] The coupling block 2 is provided with a placing hole 23, the flow guide cylinder 21 is located in the placing hole 23, one end of the placing hole 23 is provided with a scale 24, the two side walls of the coupling block 2 are provided with protrusions 25 in the shape of a spiral, the protrusions 25 are connected with a coupling cover 26, the coupling cover 26 is provided with a flapper 27 in the shape of a horn, the flapper 27 is located between the second conveying channel 28 and the coupling block 2, the flapper 27 is used to tightly contact the second conveying channel 28, thereby improving the stability of the second conveying channel 28, the second conveying channel 28 is arranged in the coupling block 2, the second conveying channel 28 close to the needle valve 1 is fixedly connected with the first conveying channel 11, during the displacement of the flow guide cylinder 21 and the ring block 3 in the placing hole 23, the scale 24 recorded on the placing hole 23 is used to measure the volume change of the second conveying channel 28 caused by temperature factors, and the subsequent maintenance of the coupling block 2 and the second conveying channel 28 is facilitated.

[0026] When the low-temperature needle valve is used, the second conveying channel 28 close to the needle valve 1 is fixedly connected with the first conveying channel 11, the second conveying channel 28 is inserted into the coupling block 2, the second conveying channel 28 is inserted into the receiving hole 6 of the ring block 3, the second conveying channel 28 is tightly contacted with the inner wall surface of the receiving hole 6, the second conveying channel 28 is loosened, the fluid is filled into the flow guide channel 1 and the flow guide channel 2 through the flow guide cylinder 21 and the flow guide channel 3, the screw rod 22 is rotated downward, the elastic cover 9 on the flow guide channel 1 and the flow guide channel 2 is expanded to block the gap between the second conveying channel 28 and the receiving hole 6, the coupling cover 26 is connected with the two ends of the coupling block 2, the flapper 27 is used to tightly contact the second conveying channel 28, thereby improving the stability of the second conveying channel 28, during the volume expansion of the second conveying channel 28 caused by temperature factors, the ring block 3 is displaced to the middle of the coupling block 2, the fluid in the flow guide channel 1 is squeezed into the flow guide channel 2, the fluid pressure is kept unchanged, thereby maintaining the blockage of the gap between the second conveying channel 28 and the receiving hole 6, during the volume contraction of the second conveying channel 28 caused by temperature factors, the ring block 3 is displaced to the two ends, the fluid in the flow guide channel 2 is squeezed into the flow guide channel 1, thereby maintaining the blockage of the second conveying channel 28 by the elastic cover 9, preventing the pulling between the second conveying channel 28 and the coupling block 2, and facilitating the blockage of the gap between the second conveying channel 28 and the receiving hole 6, during the displacement of the flow guide cylinder 21 and the ring block 3 in the placing hole 23, the scale 24 recorded on the placing hole 23 is used to measure the volume change of the second conveying channel 28 caused by temperature factors, thereby facilitating the subsequent maintenance of the coupling block 2 and the second conveying channel 28.

[0027] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A cryogenic regulating needle valve, comprising a needle valve (1), wherein the needle valve (1) has a pre-reserved transport channel (11), characterized in that, The first transport channel (11) is connected to a connecting block (2). Inside the connecting block (2), there are two adjacent ring blocks (3). The two ends of the ring blocks (3) are fixedly connected to spiral beryllium copper wires (4). The ring blocks (3) have openings (5). The end of the ring blocks (3) closer to the outside of the connecting block (2) has a storage opening (6). The upper part of the storage opening (6) is equipped with a first guide channel (7), and the lower part of the storage opening (6) is equipped with a second guide channel (8). The ends of the first guide channel (7) and the second guide channel (8) closer to the storage opening (6) are fixedly connected to an elastic cover (9). The confluence point of the first guide channel (7) and the second guide channel (8) is connected to a guide. Channel 3 (10), the top 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 connecting block (2) has a reserved placement port (23), one end of the placement port (23) is recorded with a measuring scale (24), the two sides of the connecting block (2) are fixedly connected to the protrusion (25), the protrusion (25) is spiral, the protrusion (25) is threaded with the connecting cover (26), the connecting cover (26) is fixedly connected to the ring piece (27), the connecting block (2) is equipped with a pair of transport channels 2 (28), the transport channel 2 (28) closer to the needle valve (1) on the connecting block (2) is fixedly connected to the transport channel 1 (11).

2. The cryogenic regulating needle valve according to claim 1, characterized in that, The storage opening (6) faces both ends of the connecting block (2), and the bottom wall of the storage opening (6) is oblique.

3. The cryogenic regulating needle valve according to claim 1, characterized in that, The first flow channel (7) and the second flow channel (8) are installed in the ring block (3), and the first flow channel (7) and the second flow channel (8) are filled with fluid.

4. The cryogenic regulating needle valve according to claim 1, characterized in that, The flow channel three (10) extends into the flow guide tube (21), and the flow guide tube (21) is movably connected to the placement port (23).

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

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

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