CN207064654U - A kind of ultralow temperature regulating valve for liquid helium region - Google Patents

Abstract

The utility model relates to an ultra-low temperature regulating valve used in a liquid helium temperature zone, comprising a valve body assembly, a valve stem assembly, a valve core assembly, a valve cover assembly, an actuator connection arrangement and an actuator, and the valve body assembly consists of an upper valve body, Composed of connecting pipe, heat anchor and lower valve body, the outer surface of the connecting pipe is provided with a heat anchor connected to an external cold source, the upper valve body is fixed on the equipment used, the inlet of the lower valve body is connected to the inlet pipeline, and the outlet of the lower valve body is connected to the outlet pipeline The valve stem assembly includes a spool hanger. The lower end of the spool hanger is a T-shaped head and the end surface is a spherical surface. The spool assembly includes a spool mounting seat, a non-metallic guide belt and a spool. Connecting groove, T-shaped connecting groove is matched with the T-shaped head of the valve core, the outer surface of the valve core mounting seat is provided with a guide belt ring groove, and a non-metallic guide belt is installed in the guide belt ring groove, and the bottom of the valve core is provided with an assembly process hole . Small axial heat leakage, high adjustment accuracy, excellent sealing performance, long life, light weight and easy manufacturing and assembly, and can work in the liquid helium temperature zone.

Description

An ultra-low temperature regulating valve used in the liquid helium temperature zone

technical field

The utility model relates to the technical field of low-temperature regulating valves, in particular to an ultra-low temperature regulating valve used in a liquid helium temperature zone.

Background technique

The cryogenic control valve is an important control device for controlling the pressure, flow and thermal parameters of the cryogenic fluid. The existing low temperature control valve has disadvantages, as follows: 1) Large axial heat leakage; 2) The valve core is installed during the up and down movement of the valve stem The seat and the inner cavity of the lower valve cannot realize the coaxial self-adjustment function, that is, there is no degree of freedom for self-adjustment, and there will be differences in the valve core and valve seat holes caused by design dimension tolerances, manufacturing errors, and assembly errors during the up and down movement of the valve core assembly. Coaxial, difficult to process, assemble and maintain; 3) The hard contact wear between the outer surface of the valve core mounting seat and the lower valve inner cavity and the difference in the thermal deformation ratio of the metal material cause jamming, thereby reducing the service life of the low temperature control valve; 4) In the During the assembly process, it is difficult to assemble the valve core and the valve core mounting seat, and the reliability of the assembly cannot be guaranteed.

Utility model content

The technical problem to be solved by the utility model is: to overcome the deficiencies in the prior art and provide an ultra-low temperature regulating valve used in the liquid helium temperature zone.

The technical solution adopted by the utility model to solve the technical problem is: an ultra-low temperature regulating valve used in the liquid helium temperature zone, including a valve body assembly, a valve stem assembly, a valve core assembly, a valve cover assembly, and an actuator connection setting and execution The valve body assembly is composed of an upper valve body, a connecting pipe, a heat anchor and a lower valve body. The outer surface of the connecting pipe is provided with a heat anchor connected to an external cold source. The upper valve body is fixed on the equipment used, and the lower valve body is It is connected with the inlet pipeline, and the outlet of the lower valve body is connected with the outlet pipeline. The valve stem assembly includes a valve core hanger, the lower end of the valve core hanger is a T-shaped head and the end surface is a spherical surface. The valve core assembly includes a valve core mounting seat, Non-metallic guide belt and valve core, the upper end of the valve core mounting seat is a T-shaped connecting groove, the T-shaped connecting groove is matched with the T-shaped head of the valve core hanging, and the outer surface of the valve core mounting seat is provided with a guide belt ring groove , a non-metallic guide belt is installed in the guide belt ring groove, and an assembly process hole is arranged at the bottom of the valve core.

The outer surface of the connecting pipe is provided with a heat anchor connected to the external cold source, and the valve body assembly can supplement the cooling capacity to the valve core. Compared with the existing structure without heat anchor, this structure greatly reduces the axial heat leakage of the low temperature regulating valve.

The T-shaped connection groove of the spool mounting seat matches the T-shaped head of the spool hanger, and the coaxial self-adjustment function of the spool mounting seat and the lower valve inner cavity can be realized during the up and down movement of the valve stem assembly, which is similar to the existing structure. Compared with this structure, this structure increases the degree of freedom of self-adjustment, and further makes up for the misalignment between the valve core and the valve seat hole caused by the design dimension tolerance, manufacturing error, and assembly error in the up and down movement of the valve core assembly. In addition, compared with the existing structure, This structure reduces the difficulty and cost of processing, assembly and maintenance.

The outer surface of the valve core mounting seat is provided with a guide belt ring groove, and a non-metallic guide belt is installed in the guide belt ring groove. During the up and down movement of the valve stem assembly, the valve core mounting seat is in direct hard contact with the lower valve inner cavity. Compared with the hard contact guide structure, this structure avoids the jamming phenomenon caused by the hard contact wear between the outer surface of the valve core mounting seat and the lower valve inner cavity and the thermal deformation ratio of the metal material, thereby improving the service life of the low temperature control valve.

An assembly process hole is set at the bottom of the valve core. During the assembly process, the valve core thread and the valve core mounting seat are screwed tightly through the installation process hole and the sealing gasket is pressed. Compared with the existing structure, this structure is convenient for assembly and ensures the safety of assembly. reliability.

Further, the inlet and outlet of the lower valve body are reserved with welded joints and threaded joints, and the threaded joints are equipped with sealing tapered surfaces. Compared with the existing reserved single interface structure, this structure can choose welding or threaded connection according to the actual construction on site, which improves the flexibility of construction.

Further, the valve stem assembly is composed of a valve stem seal, a valve stem connecting pipe and a valve core hanger, and the valve stem connecting pipe is provided with a pressure through hole. The internal and external pressure of the connecting pipe of the valve stem can be balanced. Compared with the existing structure, the structure improves the stability of the valve stem assembly, thereby improving the adjustment accuracy of the adjustment.

Further, the bonnet assembly is composed of a bonnet lock nut, a bonnet, a fixing, a fixing flange lock nut and a connecting rod, the bonnet lock nut is threadedly connected with the upper valve body, the bonnet lock nut and The upper valve body has installation process holes. During the assembly process, the upper valve body is fixed through the installation process hole of the upper valve body, and the valve cover lock nut and the upper valve body are screwed tightly through the valve cover lock nut installation process hole. Compared with the existing structure, this structure is easy to assemble , the structure is simple, and the weight of the product is reduced.

Furthermore, the actuator connection arrangement is composed of a lock nut, an upper connecting piece, a nut, a bolt and a lower connecting piece, the upper connecting piece is threaded with the actuator, and the lower connecting piece is threaded with the connecting rod of the valve cover assembly Connection, the upper connecting piece and the lower connecting piece are connected by flanges with bolts and nuts, and the upper connecting piece and the lower connecting piece are respectively set with lock nuts to lock. During the assembly process, adjust the extension rod of the actuator to a suitable position. By screwing the upper connecting piece and the lower connecting piece, the end faces of the upper connecting piece and the lower connecting piece are in contact and the threaded holes are coaxial. The upper connecting piece and the lower connecting piece are connected by bolts and nuts. The connecting piece is connected, and the nuts of the upper connecting piece and the lower connecting piece are locked and locked to prevent the connecting piece from rotating. Compared with the existing connecting structure, this structure is easy to assemble, easy to operate, and reliable in connection.

Further, the actuator is driven by gas, liquid or electric.

The beneficial effects of the utility model are: the ultra-low temperature control valve of the utility model has small axial heat leakage, high adjustment precision, excellent sealing performance, long service life, light weight and easy manufacturing and assembly, and can work in the liquid helium temperature zone (-272°C). .

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural representation of the utility model.

FIG. 2 is a schematic diagram of an enlarged structure at point I in FIG. 1 .

FIG. 3 is a schematic diagram of the enlarged structure at II in FIG. 1 .

FIG. 4 is a schematic diagram of an enlarged structure at III in FIG. 1 .

FIG. 5 is a schematic diagram of an enlarged structure at IV in FIG. 1 .

FIG. 6 is a schematic diagram of an enlarged structure at V in FIG. 1 .

In the figure: 10. valve body assembly, 11. upper valve body, 12. connecting pipe, 13. heat anchor, 14. lower valve body, 20. valve stem assembly, 21. valve stem seal, 22. valve stem connecting pipe, 23. Valve core hanger, 30. Valve core assembly, 31. Valve core mounting seat, 32. Non-metal guide belt, 33. Gasket, 34. Valve core, 40. Bonnet assembly, 41. Bonnet lock nut, 42. Bonnet, 43. Fixed flange, 44. Fixed flange lock nut, 45. Connecting rod, 50. Actuator connection setting, 51. Lock nut, 52. Upper connecting piece, 53. Nut, 54. Bolt, 55. Lower connecting piece, 60. Actuator, 101. Inlet, 102. Outlet, 103. Welding interface, 104. Threaded interface, 105. Sealing cone, 106. Thread, 107. Installation process hole, 108. Valve Seat hole, 201. T-shaped head, 202. spherical surface, 203. pressure through hole, 302. assembly process hole.

Detailed ways

The utility model is described further in conjunction with accompanying drawing now. These drawings are simplified schematic diagrams only to illustrate the basic structure of the utility model in a schematic way, so they only show the configurations related to the utility model.

As shown in Figure 1, the upper valve body 11 of the ultra-low temperature regulating valve used in the liquid helium temperature zone is fixed on the use equipment, the inlet 101 of the lower valve body 14 is connected to the inlet pipeline, and the outlet 102 of the lower valve body 14 is connected to the outlet pipeline , by changing the input signal of the actuator 60, the actuator 60 drives the actuator connection device 50 to move up and down so as to drive the valve stem assembly 20 together with the valve core assembly 30 to move up and down, thereby changing the flow area between the valve core 34 and the valve seat hole 108 , to achieve the purpose of adjusting flow, pressure and thermal parameters.

The upper valve body 11 and the lower valve body 14 are installed at both ends of the connecting pipe 12, and are hermetically connected with the two ends of the connecting pipe 12. The upper valve body 11 is welded to the equipment used to fix the low temperature regulating valve, and the heat anchor 13 is connected to the external cold source ( not shown in the figure) connection; the valve stem assembly 20 is placed inside the valve body assembly 10, and its valve stem seal assembly 21 can realize the sealing between the valve stem assembly 20 and the valve body assembly 10, and the valve stem seal assembly 21 is connected to the valve stem The connecting pipe 22 and the valve core hanger 23, the valve stem connecting pipe 22 is provided with a pressure through hole 203; the connecting rod 45 of the valve cover assembly 40 is connected with the valve stem assembly 20, and its fixing flange 43 is connected with the actuator 60 and fixes the actuator ;Actuator connection setting 50 The upper connecting piece 52 is threadedly connected with the actuator, and the lower connecting piece 55 is threadedly connected with the valve cover assembly 40 connecting rod 45, and the upper connecting piece 52 and the lower connecting piece 55 are connected by flanges with bolts 54 and nuts 53 , the upper connecting piece 52 and the lower connecting piece 55 are respectively provided with locking nuts 51 to prevent the connecting piece from rotating; The seat 31 is connected, and the gasket 33 is pressed between the valve core 34 and the valve core mounting seat 31. The bottom of the valve core 34 is provided with an installation process hole 302, and the valve core mounting seat 31 is provided with a guide belt ring groove for installing non- Metal guide strip 32.

In this embodiment, as shown in Figure 2, the lower end of the spool hanger 23 is a T-shaped head 201 and the end surface is a spherical surface 202, the upper end of the spool mounting seat 31 is a T-shaped connecting groove, and the spool hanger 23 and the spool mounting seat 31 pass through The T-shaped head 201 is connected with the spherical surface 202, and the coaxial self-adjustment function between the valve core mounting seat 31 and the inner cavity of the lower valve body 14 can be realized during the up and down movement of the valve stem assembly 20. Compared with the existing structure, this structure increases The degree of freedom of self-adjustment further makes up for the misalignment between the valve core 34 and the valve seat hole 108 caused by the design dimension tolerance, manufacturing error, and assembly error in the up and down movement of the valve core assembly 30. In addition, compared with the existing structure, this structure reduces It reduces the difficulty and cost of processing, assembly and maintenance.

In this embodiment, as shown in Figure 2, the outer surface of the valve core mounting seat 31 is provided with a guide belt ring groove. After the non-metallic guide belt 32 is installed, the valve core mounting seat 31 and the lower valve body will be connected to each other when the valve stem assembly 20 moves up and down. 14 inner cavity non-direct hard contact guide, compared with the existing hard contact guide structure, this structure avoids the sticking caused by the hard contact wear between the outer surface of the valve core mounting seat 31 and the inner cavity of the lower valve body 14 and the thermal deformation ratio of the metal material Resistance phenomenon, thereby improving the service life of the low temperature control valve.

In this embodiment, as shown in FIG. 3 , an assembly process hole 302 is provided at the bottom of the valve core. During the valve assembly process, the thread of the valve core 34 and the valve core mounting seat 31 are screwed tightly through the installation process hole and the gasket 33 is pressed tightly. Compared with the existing structure, the structure is convenient for assembly and ensures the reliability of assembly.

In this embodiment, as shown in Figure 3, the inlet 101 and the outlet 102 of the lower valve body 14 are reserved for welding joints 103 and threaded joints 104 to connect with external pipelines, and the threaded joints 104 are equipped with sealing cones 105, which are different from the existing Compared with the reserved single interface structure, this structure can choose welding or threaded connection according to the actual construction on site, which improves the flexibility of construction.

In this embodiment, as shown in Figure 4, the valve stem connecting pipe 22 of the valve stem assembly 20 is provided with a pressure through hole 203 to balance the pressure inside and outside the valve stem connecting pipe 22. Compared with the existing structure, this structure improves the pressure of the valve stem. The stability of the assembly 30, thereby improving the adjustment accuracy of the adjustment.

In this embodiment, as shown in FIG. 5 , in the bonnet assembly 40 , the bonnet lock nut 41 is connected to the upper valve body 11 through threads 106 , and both the bonnet lock nut 41 and the upper valve body 11 have installation process holes 107 In the assembly process, the upper valve body 11 is fixed through the installation process hole 107 of the upper valve body 11, and the valve cover lock nut 41 and the upper valve body 11 are threaded and tightened through the valve cover lock nut 41 installation process hole 107, which is compatible with the existing Compared with the structure, the structure is convenient to assemble, simple in structure, and reduces the weight of the product.

In this embodiment, as shown in Figure 6, the upper connecting piece 52 of the actuator connection setting 50 is threadedly connected to the actuator 60, and the lower connecting piece 55 is threadedly connected to the connecting rod 45 of the valve cover assembly 40, and the actuator is screwed during the assembly process. Stretch out rod 61 and adjust to proper position, make upper connecting piece 52 and lower connecting piece 55 end surface contact and threaded hole 501 coaxial by screwing upper connecting piece 52 and lower connecting piece 55, connect upper connecting piece 52 by bolt 54, nut 53 Connect with the lower connecting piece 55, in addition the upper connecting piece 52 and the lower connecting piece 55 are locked by nut locking 51 to prevent the connecting piece from rotating. Compared with the existing connection structure, this structure is easy to assemble, easy to operate, and reliable in connection.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (6)

1. A kind of 1. ultralow temperature regulating valve for liquid helium region, it is characterised in that：Including valve component (10), valve rod assembly (20), core assembly (30), bonnet assemblies (40), actuator connection set (50) and actuator (60), the valve component (10) be made up of upper valve body (11), connecting tube (12), hot anchor (13) and lower valve body (14), connecting tube (12) outer surface set with it is outer The hot anchor (13) of portion low-temperature receiver connection, upper valve body (11) are fixed on using in equipment, lower valve body (14) import (101) and suction line Connection, lower valve body (14) outlet (102) are connected with outlet line, and the valve rod assembly (20) includes valve element and hangs (23), the valve It is T connector (201) and end face is sphere (202) that core, which hangs (23) lower end, the core assembly (30) including valve element mounting seat (31), Non-metal guide band (32) and valve element (34), valve element mounting seat (31) upper end are T-shaped link slot, the T-shaped link slot with The T connector (201) that valve element hangs (23) is engaged, and valve element mounting seat (31) outer surface is provided with guidance tape annular groove, guidance tape annular groove Non-metal guide band is inside installed, valve element (34) bottom sets assembly technology hole (302).
2. A kind of 2. ultralow temperature regulating valve for liquid helium region according to claim 1, it is characterised in that：The lower valve body (14) the reserved welding junction (103) of import (101) and outlet (102) and hickey (104), its hickey (104) Equipped with sealing cone (105).
3. A kind of 3. ultralow temperature regulating valve for liquid helium region according to claim 1, it is characterised in that：The valve rod group Part (20) is hung (23) by valve stem seal (21), valve rod connecting tube (22) and valve element and formed, and valve rod connecting tube (22) sets pressure to lead to Hole (203).
4. A kind of 4. ultralow temperature regulating valve for liquid helium region according to claim 1, it is characterised in that：The bonnet group Part (40) is by bonnet locking nut (41), bonnet (42), fixed (43), mounting flange locking nut (44) and connecting rod (45) group Into bonnet locking nut (41) is connected with upper valve body (11) by screw thread (106), bonnet locking nut (41) and upper valve body (11) There is installing technological hole (107).
5. A kind of 5. ultralow temperature regulating valve for liquid helium region according to claim 4, it is characterised in that：The actuator Connection sets (50) to be made up of locking nut (51), upper connection sheet (52), nut (53), bolt (54) and lower connection sheet (55), The upper connection sheet (52) is threadedly coupled with actuator (60), lower connection sheet (55) and connecting rod (45) spiral shell of bonnet assemblies (40) Line is connected, and upper connection sheet (52) and lower connection sheet (55) are connected by flange with bolt (54) nut (53), upper connection sheet (52) Locking nut (51) is set to lock respectively with lower connection sheet (55).
6. A kind of 6. ultralow temperature regulating valve for liquid helium region according to claim 1, it is characterised in that：The actuator (60) it is gas-powered, liquid driven or electric drive.