Pneumatic low-temperature regulating valve with cold box supporting structure

Abstract

The utility model relates to the technical field of regulating valves, and discloses a pneumatic low-temperature regulating valve with a cold box supporting structure, which comprises a regulating valve and a cold box component, a valve cover is arranged at the top of the regulating valve, and a valve rod is arranged at the top of the valve cover through a groove. The cold box assembly is composed of the cold box assembly and the protection assembly, the cold box assembly can be fixed to the adjusting valve by inserting the fixing columns of the fixing assembly into the grooves formed in the valve deck and then inserting the short fixing bolts into the fixing pieces and the fixing columns, and therefore workers can replace a cold box conveniently, and the use cost of the adjusting valve is greatly reduced; the first cold box and the second cold box can be fixed through long fixing bolts and nuts, certain buffering can be achieved through a limiting plate and a spring A when workers install the cold boxes, and the situation that the bottoms of the cold boxes directly collide with a valve deck, and consequently an adjusting valve is damaged is prevented; and a long fixing bolt can also adjust the diameter of a sleeve formed by connecting the first cold box and the second cold box, so that valve rods with different diameters can be conveniently mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a pneumatic low-temperature regulating valve with a supporting cold box structure. Background Art

[0002] Pneumatic low-temperature regulating valve is the most commonly used regulating equipment in large-scale low-temperature refrigeration equipment (refrigeration temperature ≤ 20K). It is the most important actuator for regulating thermal parameters such as low-temperature working fluid flow and pressure in process control.

[0003] A low-temperature deep-cold regulating valve with a cold box structure disclosed in the Chinese utility model patent application disclosure CN220540315U, although a cold box is arranged inside the valve cover and a certain steam pressure is formed on the upper part of the cold box to prevent the cold medium from contacting the stuffing box area and maintain a certain temperature of the valve stem, but during use, the valve stem is insulated by cold liquid inside the cold box. When used for too long, the cold liquid will continue to be consumed, which greatly affects the use of the cold box. Since the valve stem is welded to the cold box, it is difficult to replace it, which greatly affects the use of the regulating valve. When the cold box is in use, the outer side is prone to collision and is difficult to handle, thereby greatly reducing the service life of the regulating valve. The size of the sleeve opened in the center of the cold box is difficult to adjust, thereby greatly reducing the applicability of the cold box. Therefore, a pneumatic low-temperature regulating valve with a supporting cold box structure is proposed to solve this problem. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a pneumatic low-temperature regulating valve with a supporting cold box structure, which solves the problem that during use, the valve stem is insulated by cold liquid inside the cold box, and the cold liquid will continue to be consumed when used for too long, which greatly affects the use of the cold box. Since the valve stem is welded to the cold box, it is difficult to replace it, which greatly affects the use of the regulating valve. When in use, the cold box is prone to collision on the outside and is difficult to handle, thereby greatly reducing the service life of the regulating valve. The size of the sleeve opened in the center of the cold box is difficult to adjust, thereby greatly reducing the applicability of the cold box.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented by the following technical scheme: comprising a regulating valve and a cold box assembly, the top of the regulating valve is provided with a valve cover, the top of the valve cover is provided with a valve stem through a groove, the outside of the valve stem is provided with a cold box assembly, the outside of the cold box assembly is provided with a protective assembly, and the bottom of the cold box assembly is provided with a fixing assembly;

[0008] The cold box assembly includes a first cold box, a second cold box, a connecting piece, a clamping plate, a slide, a spring B and an extrusion plate. The second cold box is provided on one side of the first cold box, a clamping plate is provided on one side of the second cold box, connecting pieces are provided on both sides of the first cold box and the second cold box, slides are provided at the bottom of the first cold box and the second cold box, a spring B is provided on one side of the first cold box through an opened groove, and an extrusion plate is provided at one end of the spring B.

[0009] Optionally, one side of the clamping plate is connected to the extrusion plate, the number of the connecting plates is several, and the bottoms of the first cold box and the second cold box are connected with a fixing component through a slide groove.

[0010] Optionally, liquid nitrogen is provided at the inner bottom of the first cold box and the second cold box, and steam is provided on the top of the liquid nitrogen.

[0011] Optionally, the protection assembly includes a connecting plate and an anti-collision net, an anti-collision net is provided between two connecting plates, and the inner side of the connecting plate is welded to the outer sides of the first cold box and the second cold box.

[0012] Optionally, the number of the protective components is two, and the anti-collision net is made of a metal net.

[0013] Optionally, the fixing assembly includes a fixing plate, a fixing column, a long fixing bolt, a nut and a short fixing bolt. A fixing column is provided at the bottom of the fixing plate. The two connecting plates are connected by a long fixing bolt. One end of the long fixing bolt is fixed by a nut. The threaded groove between the fixing plate and the fixing column is connected to the short fixing bolt.

[0014] Optionally, the bottom of the fixing column is connected to a limiting plate, the bottom of the limiting plate is provided with a spring A, the number of the fixing columns is four, and the number of the long fixing bolts is several.

[0015] In summary, the technical effects and advantages of the utility model are:

[0016] 1. The utility model has a reasonable structure, which is composed of a cold box component and a protective component. The cold box component can be fixed on the regulating valve by inserting the fixing column of the fixing component into the groove opened inside the valve cover and then inserting the short fixing bolt into the fixing plate and the fixing column, so that it is convenient for workers to replace the cold box and greatly reduce the use cost of the regulating valve. The first cold box and the second cold box can be fixed by long fixing bolts and nuts, which is convenient for workers to use. The limit plate and spring A can provide a certain buffer when the workers install the cold box to prevent the bottom of the cold box from directly colliding with the valve cover and causing damage to the regulating valve. The long fixing bolt can also adjust the diameter of the sleeve formed by connecting the first cold box and the second cold box, so as to facilitate the installation of valve stems with different diameters and greatly improve the applicability of the cold box.

[0017] 2. In the utility model, the valve stem can be insulated by connecting the first cold box and the second cold box of the cold box assembly, and the first cold box and the second cold box can be better connected by connecting the clamping plate with the extrusion plate so that the extrusion plate extrusion spring B can be used to better connect the first cold box and the second cold box. The connecting piece is convenient for fixing it with the long fixing bolts and nuts of the fixing assembly, and the position of the fixing plate and the fixing column of the fixing assembly can be adjusted through the sliding groove so that it can be better fixed on the valve cover, thereby fixing the cold box assembly.

[0018] 3. In the utility model, liquid nitrogen is arranged at the lower part of the first cold box and the second cold box of the cold box assembly, so that the heat exchange between the outer wall of the cold box and the external atmosphere is achieved, part of the liquid nitrogen in the cold box evaporates, and a certain amount of steam is formed at the upper part of the cold box, so that the cold medium is prevented from contacting the packing area, so that the valve stem maintains a certain temperature, protects the valve stem, and avoids problems such as shaking and leakage caused by valve stem strain. The anti-collision net can be fixed to the cold box assembly through the connecting plate, so that it can be protected by the anti-collision net to prevent the cold box assembly from being bumped and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the planar structure of the pneumatic low-temperature regulating valve of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the cold box assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first cold box of the utility model;

[0022] Figure 4 This is a schematic diagram of the planar structure of the cold box assembly of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the fixed component of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the protective component of the utility model;

[0025] Figure 7 For this utility model Figure 1 Schematic diagram of the enlarged structure of A.

[0026] In the figure: 1. regulating valve; 2. valve cover; 3. valve stem; 4. cold box assembly; 5. protection assembly; 6. fixing assembly; 7. liquid nitrogen; 8. steam; 9. spring A; 10. limit plate; 401. first cold box; 402. second cold box; 403. connecting plate; 404. clamping plate; 405. slide groove; 406. spring B; 407. extrusion plate; 501. connecting plate; 502. anti-collision net; 601. fixing plate; 602. fixing column; 603. long fixing bolt; 604. nut; 605. short fixing bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example: Reference Figure 1-Figure 7 A pneumatic low-temperature regulating valve with a supporting cold box structure shown in the figure comprises a regulating valve 1 and a cold box assembly 4, a valve cover 2 is provided on the top of the regulating valve 1, a valve stem 3 is provided on the top of the valve cover 2 through a groove, a cold box assembly 4 is provided on the outside of the valve stem 3, a protective assembly 5 is provided on the outside of the cold box assembly 4, and a fixing assembly 6 is provided on the bottom of the cold box assembly 4;

[0029] The cold box assembly 4 includes a first cold box 401, a second cold box 402, a connecting piece 403, a clamping plate 404, a slide 405, a spring B406 and an extrusion plate 407. The second cold box 402 is provided on one side of the first cold box 401, a clamping plate 404 is provided on one side of the second cold box 402, connecting pieces 403 are provided on both sides of the first cold box 401 and the second cold box 402, a slide 405 is provided at the bottom of the first cold box 401 and the second cold box 402, a spring B406 is provided on one side of the first cold box 401 through an opened groove, and an extrusion plate 407 is provided at one end of the spring B406.

[0030] As a preferred implementation in this embodiment, Figure 2 , Figure 3 and Figure 4As shown, one side of the card plate 404 is connected to the extrusion plate 407, the number of the connecting pieces 403 is several, the bottom of the first cold box 401 and the second cold box 402 are connected with a fixing assembly 6 through a slide groove 405, the inner bottom of the first cold box 401 and the second cold box 402 are provided with liquid nitrogen 7, and the top of the liquid nitrogen 7 is provided with steam 8. The valve stem can be kept warm by connecting the first cold box 401 and the second cold box 402, and the card plate 404 is connected to the extrusion plate 407, so that the extrusion plate 407 can squeeze the spring B406 to better connect the first cold box 401 and the second cold box 402, and the valve stem can be kept warm by connecting the first cold box 401 and the second cold box 402. The connecting piece 403 facilitates the use of the long fixing bolt 603 and the nut 604 of the fixing assembly 6 to fix it. The position of the fixing piece 601 and the fixing column 602 of the fixing assembly 6 can be adjusted through the slide groove 405. Liquid nitrogen 7 is provided at the lower part of the first cold box 401 and the second cold box 402 of the cold box assembly 4, so that the outer wall of the cold box and the external atmosphere can exchange heat, part of the liquid nitrogen in the cold box evaporates, and a certain amount of steam 8 is formed at the upper part of the cold box, so as to prevent the cold medium from contacting the packing area, so that the valve stem 3 maintains a certain temperature, protects the valve stem 3, and avoids problems such as shaking and leakage caused by the strain of the valve stem 3.

[0031] like Figure 3 and Figure 6 As shown, in this embodiment, the protection component 5 includes a connecting plate 501 and an anti-collision net 502. The anti-collision net 502 is arranged between the two connecting plates 501. The inner side of the connecting plate 501 is welded to the outer side of the first cold box 401 and the second cold box 402. There are two protection components 5. The anti-collision net 502 is made of a metal net. The anti-collision net 502 can be fixed on the cold box component 4 through the connecting plate 501, so that it can be protected to a certain extent by the anti-collision net 502.

[0032] like Figure 1 , Figure 5 and Figure 7As shown, in this embodiment, the fixing assembly 6 includes a fixing plate 601, a fixing column 602, a long fixing bolt 603, a nut 604 and a short fixing bolt 605. The fixing plate 601 is provided with a fixing column 602 at the bottom. The two connecting plates 403 are connected by a long fixing bolt 603. One end of the long fixing bolt 603 is fixed by a nut 604. The threaded groove between the fixing plate 601 and the fixing column 602 is connected with a short fixing bolt 605. The bottom of the fixing column 602 is connected to a limiting plate 10. The bottom of the limiting plate 10 is provided with a spring A9. The number of the fixing columns 602 is four. There are several long fixing bolts 603. By inserting the fixing column 602 into the groove opened inside the valve cover 2, and then inserting the short fixing bolts 605 into the fixing plate 601 and the fixing column 602, the cold box assembly 4 can be fixed on the regulating valve 1. The first cold box 401 and the second cold box 402 can be fixed by the long fixing bolts 603 and the nuts 604. The limit plate 10 and the spring A9 can provide a certain buffer when the workers install the cold box. The long fixing bolts 603 can also adjust the diameter of the sleeve formed by connecting the first cold box 401 and the second cold box 402.

[0033] How this utility works:

[0034] The cold box assembly 4 and the protective assembly 5 are composed of the cold box assembly 4 and the protective assembly 5. The cold box assembly 4 can be fixed on the regulating valve 1 by inserting the fixing column 602 of the fixing assembly 6 into the groove opened inside the valve cover 2, and then inserting the short fixing bolt 605 into the fixing plate 601 and the fixing column 602. The first cold box 401 and the second cold box 402 can be fixed by the long fixing bolt 603 and the nut 604. The limiting plate 10 and the spring A9 can provide a certain buffer when the workers install the cold box. The long fixing bolt 603 can also adjust the diameter of the sleeve formed by connecting the first cold box 401 and the second cold box 402. The valve stem can be insulated by connecting the first cold box 401 and the second cold box 402 of the cold box assembly 4. The clamping plate 404 is connected to the extrusion plate 407 so that the extrusion plate 407 can squeeze the spring B406. In order to better connect the first cold box 401 and the second cold box 402, the connecting piece 403 is convenient for fixing it with the long fixing bolt 603 and the nut 604 of the fixing assembly 6, and the position of the fixing piece 601 and the fixing column 602 of the fixing assembly 6 can be adjusted through the slide groove 405. Liquid nitrogen 7 is provided at the lower part of the first cold box 401 and the second cold box 402 of the cold box assembly 4, so that the outer wall of the cold box and the external atmosphere can exchange heat, part of the liquid nitrogen in the cold box evaporates, and a certain amount of steam 8 is formed at the upper part of the cold box to prevent the cold medium from contacting the packing area, so that the valve stem 3 maintains a certain temperature, protects the valve stem 3, and avoids shaking, leakage and other problems caused by the strain of the valve stem 3. The anti-collision net 502 can be fixed on the cold box assembly 4 through the connecting plate 501, so that it can be protected to a certain extent by the anti-collision net 502.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A pneumatic low-temperature regulating valve with a supporting cold box structure, comprising a regulating valve (1) and a cold box assembly (4), characterized in that: The regulating valve (1) is provided with a valve cover (2) on the top, a valve stem (3) is provided on the top of the valve cover (2) via a groove, a cold box assembly (4) is provided on the outside of the valve stem (3), a protective assembly (5) is provided on the outside of the cold box assembly (4), and a fixing assembly (6) is provided on the bottom of the cold box assembly (4); The cold box assembly (4) comprises a first cold box (401), a second cold box (402), a connecting piece (403), a clamping plate (404), a slide groove (405), a spring B (406) and an extrusion plate (407); the second cold box (402) is provided on one side of the first cold box (401); the clamping plate (404) is provided on one side of the second cold box (402); connecting pieces (403) are provided on both sides of the first cold box (401) and the second cold box (402); the slide groove (405) is provided at the bottom of the first cold box (401) and the second cold box (402); a spring B (406) is provided on one side of the first cold box (401) through a groove; and an extrusion plate (407) is provided at one end of the spring B (406).

2. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 1, characterized in that: One side of the clamping plate (404) is connected to the extrusion plate (407), the number of the connecting plates (403) is several, and the bottoms of the first cold box (401) and the second cold box (402) are connected to a fixing component (6) via a slide groove (405).

3. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 1, characterized in that: Liquid nitrogen (7) is provided at the inner bottom of the first cold box (401) and the second cold box (402), and steam (8) is provided at the top of the liquid nitrogen (7).

4. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 1, characterized in that: The protection assembly (5) comprises a connecting plate (501) and an anti-collision net (502), wherein the anti-collision net (502) is provided between the two connecting plates (501), and the inner side of the connecting plate (501) is welded to the outer sides of the first cold box (401) and the second cold box (402).

5. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 4, characterized in that: The number of the protection components (5) is two, and the anti-collision net (502) is made of a metal net.

6. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 1, characterized in that: The fixing assembly (6) comprises a fixing plate (601), a fixing column (602), a long fixing bolt (603), a nut (604) and a short fixing bolt (605); a fixing column (602) is provided at the bottom of the fixing plate (601); the two connecting plates (403) are connected via a long fixing bolt (603); one end of the long fixing bolt (603) is fixed via a nut (604); and a short fixing bolt (605) is connected to a threaded groove provided between the fixing plate (601) and the fixing column (602).

7. The pneumatic low-temperature regulating valve with a supporting cold box structure according to claim 6, characterized in that: The bottom of the fixing column (602) is connected to a limiting plate (10), and a spring A (9) is provided at the bottom of the limiting plate (10). The number of the fixing columns (602) is four, and the number of the long fixing bolts (603) is several.

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