Heat-preservation pressure-resistant valve

Abstract

The utility model discloses a heat preservation pressure-resistant valve which comprises a valve body, a valve element and a valve rod, an inflow channel and an outflow channel are arranged in the valve body, a communication hole is formed in the middle of the valve body, the valve element is fixed at one end of the valve rod and matched with the communication hole to control the circulation state of the inflow channel and the outflow channel, and an installation portion is further arranged in the middle of the valve body. A valve cover is arranged on the mounting part and fixedly connected with the mounting part through a bolt, a hand wheel is arranged at one end, penetrating through the valve cover, of the valve rod, a sealing piece is arranged at the matching position of the valve cover and the valve rod, a heat preservation sleeve is arranged on the outer sides of the valve body and the mounting part, and three blocking rings are arranged on the heat preservation sleeve, so that a heat preservation cavity is formed between the heat preservation sleeve and the valve body; the heat preservation sleeve is additionally arranged on the outer side of the valve body, and a heat preservation cavity can be formed on the outer side of the valve body, so that heat energy exchange between the valve body and the outside is reduced, crystallization of media circulating in the valve body is avoided, and the heat preservation valve is suitable for being used in the chemical industry and the chemical fertilizer industry.

Description

Technical Field

[0001] The utility model discloses a heat-insulating and pressure-resistant valve, belonging to the technical field of valves. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, with functions such as shutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief. In the process of conveying pipeline media, the existing valves have a large heat loss when the valve exchanges heat with the outside world because the valve body is in direct contact with the air, which makes the medium prone to crystallization, which in turn has a great impact on the opening and closing of the valve. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a heat-insulating and pressure-resistant valve.

[0004] The utility model achieves the above-mentioned purpose through the following technical scheme: a heat-insulating and pressure-resistant valve, comprising a valve body, a valve core and a valve stem, wherein an inflow channel and an outflow channel are arranged in the valve body, and a connecting hole is arranged in the middle of the valve body, the valve core is fixed at one end of the valve stem, and cooperates with the connecting hole to control the flow state of the inflow channel and the outflow channel, a mounting portion is also arranged in the middle of the valve body, a valve cover is arranged on the mounting portion, the valve cover and the mounting portion are fixedly connected by bolts, a hand wheel is arranged at one end of the valve stem passing through the valve cover, a sealing member is arranged at the cooperation position between the valve cover and the valve stem, a heat-insulating sleeve is arranged on the outer side of the valve body and the mounting portion, and three blocking rings are arranged on the heat-insulating sleeve to form a heat-insulating cavity between the heat-insulating sleeve and the valve body.

[0005] Preferably, a plurality of support bars distributed in an array are arranged in the thermal insulation sleeve, and the support bars are in contact with the outer wall of the valve body.

[0006] Preferably, an annular groove is provided on the valve body and the mounting portion corresponding to the blocking ring, and the annular groove cooperates with the blocking ring.

[0007] Preferably, the thermal insulation sleeve comprises two combination sleeves which are arranged in a mirror image of the axial center line of the valve body and the mounting portion, and the two combination sleeves are provided with protrusions, and the protrusions are provided with mounting holes.

[0008] Preferably, a welding groove is provided at the position where the two combination sleeves abut against each other.

[0009] Preferably, the sealing component includes a pressing sleeve, a pressure plate, a pivot bolt and a nut. A countersunk hole is provided on the valve cover, the countersunk hole is filled with filler, the pressing sleeve cooperates with the countersunk hole, the valve stem passes through the pressure plate, one end of the pivot bolt is rotatably connected to the valve cover, and the other end passes through the pressure plate, and the nut is threadedly connected to the pivot bolt.

[0010] Preferably, a bracket is mounted on the valve cover, and one end of the bracket away from the valve cover is slidably arranged with the valve stem.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. By adding an insulation sleeve on the outside of the valve body, an insulation cavity can be formed on the outside of the valve body, thereby reducing the heat exchange between the valve body and the outside world to avoid crystallization of the medium flowing in the valve body, which is suitable for use in the chemical and fertilizer industries.

[0013] 2. The insulation cover is welded by two combination covers. The weld groove can ensure the flatness of the weld and the welding quality of the insulation cover. At the same time, the support bar can improve the overall strength of the insulation cover and improve the pressure resistance and stability of the insulation cover when under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a heat-insulating and pressure-resistant valve of the utility model;

[0015] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0016] Figure 3 This is a schematic diagram of the structure of the valve body and the insulation sleeve in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the combined sleeve in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the valve body in the utility model;

[0019] Figure numerals: 1. inflow channel; 2. valve core; 3. valve stem; 4. valve cover; 5. pressing sleeve; 6. bracket; 7. handwheel; 8. annular groove; 9. nut; 10. pressure plate; 11. living bolt; 12. outflow channel; 13. insulation chamber; 14. insulation sleeve; 15. connecting hole; 16. valve body; 17. mounting part; 18. bump; 19. support bar; 20. weld groove; 21. combination sleeve; 22. mounting hole; 23. blocking ring. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-Figure 5 As shown, a heat-insulating and pressure-resistant valve includes a valve body 16, a valve core 2 and a valve stem 3. An inflow channel 1 and an outflow channel 12 are arranged in the valve body 16, and a connecting hole 15 is arranged in the middle of the valve body 16. The valve core 2 is fixed to one end of the valve stem 3 and cooperates with the connecting hole 15 to control the flow state of the inflow channel 1 and the outflow channel 12. A mounting portion 17 is also arranged in the middle of the valve body 16, and a valve cover 4 is arranged on the mounting portion 17. The valve cover 4 and the mounting portion 17 are fixedly connected by bolts. A hand wheel 7 is arranged at one end of the valve stem 3 that passes through the valve cover 4, and a sealing member is arranged at the matching position of the valve cover 4 and the valve stem 3. An insulation sleeve 14 is arranged on the outer side of the valve body 16 and the mounting portion 17, and three blocking rings 23 are arranged on the insulation sleeve 14 to form an insulation cavity 13 between the insulation sleeve 14 and the valve body 16.

[0022] A plurality of support bars 19 distributed in an array are arranged inside the insulation sleeve 14, and the support bars 19 are in contact with the outer wall of the valve body 16. When the outer wall of the insulation sleeve 14 is subjected to pressure, the support bars 19 can effectively support the insulation sleeve 14, thereby reducing the possibility of deformation of the insulation sleeve 14 due to force and improving the pressure resistance and stability of the insulation sleeve 14.

[0023] An annular groove 8 is provided on the valve body 16 and the mounting portion 17 corresponding to the blocking ring 23. The annular groove 8 cooperates with the blocking ring 23. After the insulation sleeve 14 is installed, the blocking ring 23 is embedded in the annular groove 8, which can prevent the hot air in the insulation cavity 13 from flowing out of the gap, thereby further reducing heat loss.

[0024] The insulation sleeve 14 includes two combination sleeves 21 which are arranged in a mirror image with the axial center line of the valve body 16 and the mounting portion 17. The two combination sleeves 21 are provided with protrusions 18, and the protrusions 18 are provided with mounting holes 22. The positions where the two combination sleeves 21 abut against each other are provided with weld grooves 20. When welding the two combination sleeves 21, the two combination sleeves 21 are first connected by nuts 9 and bolts to achieve a pre-fixing effect, and then welding is performed along the weld grooves 20 by using a welding gun and welding rods, so that the welds are aligned, and the welding rods are filled in the weld grooves 20 after melting, so as to ensure the welding quality of the two combination sleeves 21.

[0025] The sealing component includes a pressing sleeve 5, a pressing plate 10, a pivot bolt 11 and a nut 9. A countersunk hole is provided on the valve cover 4, and the countersunk hole is filled with a filler. The pressing sleeve 5 cooperates with the countersunk hole, and the valve stem 3 passes through the pressing plate 10. One end of the pivot bolt 11 is rotatably connected to the valve cover 4, and the other end passes through the pressing plate 10. The nut 9 is threadedly connected to the pivot bolt 11. By rotating the nut 9, the position of the nut 9 on the pivot bolt 11 is changed, and pressure is applied to the pressing plate 10 and the pressing sleeve 5, so that the pressing sleeve 5 is pressed into the countersunk hole. In this way, the filler can be compacted to ensure the sealing between the valve stem 3 and the valve cover 4.

[0026] A bracket 6 is installed on the valve cover 4. The bracket 6 is slidably arranged with the valve stem 3 at one end away from the valve cover 4. The bracket 6 can support the valve stem 3 at a position between the valve cover 4 and the hand wheel 7, thereby improving the rigidity of the valve stem 3 and avoiding the valve stem 3 from bending due to force when the hand wheel 7 is turned.

[0027] Working principle: The valve core 2 can be driven to move by rotating the valve stem 3. When the valve core 2 and the connecting hole 15 are in contact with each other, the valve can be closed, and the valve can be opened by rotating the valve in the opposite direction. When the medium flows in the inflow channel 1 and the outflow channel 12, the medium is in a fluid state at a higher temperature. The valve body 16 is affected by the medium and heats up. The heat-insulating cavity 13 formed between the heat-insulating sleeve 14 and the valve body 16 can have a certain heat-insulating effect, thereby reducing heat loss to avoid crystallization due to the decrease in medium temperature.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat-insulating and pressure-resistant valve, comprising a valve body (16), a valve core (2) and a valve stem (3), characterized in that: The valve body (16) is provided with an inflow channel (1) and an outflow channel (12), and a connecting hole (15) is provided in the middle of the valve body (16). The valve core (2) is fixed to one end of the valve stem (3) and cooperates with the connecting hole (15) to control the flow state of the inflow channel (1) and the outflow channel (12). The valve body (16) is also provided with a mounting portion (17) in the middle, and a valve cover (4) is provided on the mounting portion (17). The valve cover (4) is fixedly connected to the mounting portion (17) by bolts, a hand wheel (7) is arranged at one end of the valve stem (3) penetrating the valve cover (4), a sealing member is arranged at the joint between the valve cover (4) and the valve stem (3), an insulation sleeve (14) is arranged on the outer side of the valve body (16) and the mounting portion (17), and three blocking rings (23) are arranged on the insulation sleeve (14) so ​​that an insulation cavity (13) is formed between the insulation sleeve (14) and the valve body (16).

2. A heat-insulating and pressure-resistant valve according to claim 1, characterized in that: A plurality of support bars (19) distributed in an array are arranged in the thermal insulation sleeve (14), and the support bars (19) are in contact with the outer wall of the valve body (16).

3. A heat-insulating and pressure-resistant valve according to claim 2, characterized in that: The valve body (16) and the mounting portion (17) are provided with an annular groove (8) at locations corresponding to the blocking ring (23), and the annular groove (8) cooperates with the blocking ring (23).

4. The heat-insulating and pressure-resistant valve according to claim 3, characterized in that: The thermal insulation sleeve (14) comprises two combination sleeves (21) arranged in a mirror image with respect to the axis center line of the valve body (16) and the mounting portion (17), the two combination sleeves (21) are provided with a protrusion (18), and the protrusion (18) is provided with a mounting hole (22).

5. The heat-insulating and pressure-resistant valve according to claim 4, characterized in that: A welding groove (20) is provided at the position where the two combined sleeves (21) abut against each other.

6. The heat-insulating and pressure-resistant valve according to claim 1, characterized in that: The sealing component comprises a pressing sleeve (5), a pressure plate (10), a pivot bolt (11) and a nut (9); a countersunk hole is arranged on the valve cover (4); the countersunk hole is filled with a filler; the pressing sleeve (5) cooperates with the countersunk hole; the valve stem (3) passes through the pressure plate (10); one end of the pivot bolt (11) is rotatably connected to the valve cover (4); the other end passes through the pressure plate (10); the nut (9) is threadedly connected to the pivot bolt (11).

7. The heat-insulating and pressure-resistant valve according to claim 1, characterized in that: A bracket (6) is mounted on the valve cover (4), and one end of the bracket (6) away from the valve cover (4) is slidably arranged with the valve stem (3).

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