Temperature-adjustable mechanical high-temperature shut-off valve

Abstract

The mechanical high-temperature shut-off valve comprises a valve body and a valve cover, the middle position of the top of the valve body is connected with the valve cover through a flange, the middle position of the bottom of the valve cover is provided with a first connecting block, the inner bottom of the first connecting block is provided with an adjusting groove, and the middle position of the inner top of the adjusting groove is provided with a metal expansion joint. A valve rod is arranged at the bottom of the metal expansion joint, a downward U-shaped clamping block is arranged at the bottom of the valve rod, a second connecting block is arranged at the bottom of the inner side of the U-shaped clamping block and connected with a clamping groove of the U-shaped clamping block in a clamped mode, and fixing bolts are connected into threaded holes in the tops of the second connecting block and the U-shaped clamping block through threads. The metal expansion joint is heated to extend out, the valve clack can make contact with the valve seat to cut off flow, damage to equipment caused by circulation of high-temperature media is prevented, and the valve clack can be detached and replaced before and after the valve body is installed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature shut-off valves, in particular to a temperature-adjustable mechanical high-temperature shut-off valve. Background Art

[0002] The high-temperature shut-off valve has excellent sealing performance and can maintain the sealing of the valve in high-temperature environments to prevent medium leakage. It can be quickly closed in an emergency to cut off the high-temperature medium and prevent serious accidents such as fire or explosion.

[0003] In the prior art, general shut-off valves cannot intercept high-temperature media when in use, which will cause the equipment to be corroded by the high-temperature media and cause damage. Moreover, after long-term use, the valve disc may be damaged at high temperatures and cannot be disassembled and replaced, resulting in certain waste. Utility Model Content

[0004] The purpose of the present utility model is to provide a mechanical high-temperature shut-off valve with adjustable temperature to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temperature-adjustable mechanical high-temperature shut-off valve, comprising a valve body and a valve cover, the middle position of the top of the valve body is connected to the valve cover by a flange, and an annular sealing sheet is provided at the connection between the valve cover and the valve body, a connecting block 1 is provided at the middle position of the bottom of the valve cover, and an adjusting groove is provided at the bottom inner bottom of the connecting block 1, a metal expansion joint is provided at the middle position of the top inner top of the adjusting groove, and a valve stem is provided at the bottom of the metal expansion joint, a downward-facing U-shaped block is provided at the bottom of the valve stem, and a connecting block 2 is provided at the inner bottom of the U-shaped block, a slot corresponding to the U-shaped block is provided at the middle position of the top of the connecting block 2, and the The second connecting block is snapped into the slot of the U-shaped clamping block, and both ends of the second connecting block and the top of the U-shaped clamping block are evenly provided with threaded holes, and the threaded holes of the second connecting block and the top of the U-shaped clamping block are both threadedly connected with fixing bolts, so that the metal expansion joint is extended when heated, driving the valve stem and the valve disc to press down and contact the valve seat, which can intercept the high-temperature medium and prevent the high-temperature medium from directly circulating and causing damage to the equipment. Before assembly, the U-shaped clamping block at the bottom of the valve stem can be preliminarily positioned and plugged into the second connecting block, and then a screw can be used to screw through the plug block, the U-shaped clamping block and the second connecting block for secondary fixation, which can make the connection more stable and tight to prevent it from loosening, and also facilitate the disassembly and replacement of the valve disc.

[0006] Preferably, a valve flap is provided at the bottom of the second connecting block, and a valve seat is provided at a middle position of the valve flap corresponding to the valve body.

[0007] Preferably, a center block is provided in the middle position of the bottom of the valve disc, and connecting rods are provided on both sides of the bottom end of the center block, and an annular brush is provided on the outside of the connecting rod, so that the valve disc drives the annular brush to move through the center block and the connecting rod to clean the inside of the valve seat, thereby preventing dust and impurities in the medium from adhering to it and affecting its closing effect.

[0008] Preferably, an insert block is provided in the middle position of the inner bottom of the U-shaped card block, and a slot is provided in the connecting block 2 corresponding to the insert block inside the U-shaped card block, and the inner side of the U-shaped card block is connected to the slot of the connecting block 2 through the insert block.

[0009] Preferably, threaded bearings are provided at the corresponding middle positions of the insert block, U-shaped clamping block and connecting block 2, and screws are threadedly connected in the threaded bearings of the insert block, U-shaped clamping block and connecting block 2, and nuts are threadedly connected at both ends of the screw, so that the screws and nuts perform secondary fixation on the U-shaped clamping block and connecting block 2, making their connection more stable and tight.

[0010] Preferably, a spring is provided on the outside of the valve stem, and the top end of the spring is connected to the adjustment slot, and the bottom end of the spring is connected to the top of the U-shaped block, so that the valve stem can be extended and retracted under the action of the spring.

[0011] Preferably, the connecting blocks in the middle of the four sides of the regulating tank are all provided with a liquid inlet tank, and the connecting blocks at the top outer sides of the liquid inlet tank are all provided with a baffle with a downward slant, so that the baffle blocks the medium and allows it to pass through the liquid inlet tank into the regulating tank, so that it can quickly contact and react with the metal expansion joint.

[0012] Preferably, flanges are provided at both ends of the valve body pipeline, and the internal parts of the valve body are all made of high-temperature resistant materials.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: when a high-temperature medium flows through the temperature-adjustable mechanical high-temperature shut-off valve, the metal expansion joint in the adjusting groove can be heated and extended, which can drive the valve stem to be pressed down, so that the valve stem drives the connected valve disc to be pressed down and contact the valve seat, thereby intercepting the high-temperature medium and preventing the high-temperature medium from directly flowing and causing damage to the equipment. Before assembly, the U-shaped block at the bottom of the valve stem can be preliminarily positioned and plugged into the connecting block 2, and fixed with a fixing bolt, and then the screw can be screwed through the plug block, the U-shaped block and the connecting block 2 to perform a secondary fixation on the U-shaped block and the connecting block 2, making their connection more stable and tight to prevent them from loosening, and also facilitating the disassembly and replacement of the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2This is a schematic diagram of the main cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the top view of the connecting block 2 and the U-shaped clamping block of the utility model;

[0017] Figure 4 For the utility model Figure 2 A in the middle is an enlarged structural diagram;

[0018] Figure 5 For the utility model Figure 2 The enlarged structural diagram at B in the middle;

[0019] In the figure: 1. Valve body; 2. Valve cover; 3. Connecting block 1; 4. Annular sealing disc; 5. Valve disc; 6. Connecting rod; 7. Annular brush; 8. Center block; 9. Valve seat; 10. Connecting block 2; 11. Nut; 12. Screw; 13. U-shaped clamping block; 14. Fixing bolt; 15. Valve stem; 16. Adjusting groove; 17. Liquid inlet groove; 18. Metal expansion joint; 19. Spring; 20. Slot; 21. Insert block; 22. Clamping slot; 23. Baffle. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-5The utility model provides an embodiment of a temperature-adjustable mechanical high-temperature shut-off valve, comprising a valve body 1 and a valve cover 2. The middle position of the top of the valve body 1 is connected to the valve cover 2 through a flange, and an annular sealing piece 4 is provided at the connection between the valve cover 2 and the valve body 1. A connecting block 3 is provided at the middle position of the bottom of the valve cover 2, and an adjusting groove 16 is provided at the bottom of the inner bottom of the connecting block 3. A metal expansion joint 18 is provided at the middle position of the top of the adjusting groove 16, and a valve stem 15 is provided at the bottom of the metal expansion joint 18. A downward-facing U-shaped block 13 is provided at the bottom of the valve stem 15, and a connecting block 2 10 is provided at the inner bottom of the U-shaped block 13. A valve disc 5 is provided at the bottom of the connecting block 2 10, and a valve seat 9 is provided at the middle position of the valve disc 5 corresponding to the middle position in the valve body 1. The middle position of the top of the connecting block 2 10 A card slot 22 corresponding to the U-shaped card block 13 is provided, and the connecting block 2 10 is snapped into the card slot 22 of the U-shaped card block 13, and both ends of the connecting block 2 10 and the top of the U-shaped card block 13 are evenly provided with threaded holes, and the threaded holes of the connecting block 2 10 and the top of the U-shaped card block 13 are both connected with fixing bolts 14 through threads, and an insert block 21 is provided in the middle position of the bottom inside the U-shaped card block 13, and a slot 20 is provided in the connecting block 2 10 corresponding to the insert block 21 inside the U-shaped card block 13, and the inner side of the U-shaped card block 13 is plugged into the slot 20 of the connecting block 2 10 through the insert block 21, and the middle positions corresponding to the insert block 21, the U-shaped card block 13 and the connecting block 2 10 are all provided with threaded bearings, and the threaded bearings of the insert block 21, the U-shaped card block 13 and the connecting block 2 10 are threaded. It is connected with a screw rod 12, and both ends of the screw rod 12 are connected with nuts 11 through threads. A spring 19 is provided on the outside of the valve stem 15, and the top of the spring 19 is connected to the adjusting groove 16, and the bottom end of the spring 19 is connected to the top of the U-shaped block 13. Both ends of the valve body 1 pipeline are provided with flanges, and the parts inside the valve body 1 are all made of high-temperature resistant materials. The staff aligns the U-shaped block 13 at the bottom of the valve stem 15 with the slot 22 on the connecting block 10, and then inserts the plug 21 at the bottom of the U-shaped block 13 into the slot 20 for preliminary positioning. Then, the U-shaped block 13 is fixed to the connecting block 10 with the fixing bolt 14, and then the screw rod 12 is screwed through the plug 21, the U-shaped block 13 and the connecting block 10, and the nuts 11 are screwed on both ends for limiting. The U-shaped block 13 and the connecting block 2 10 can be fixed for a second time, which can make their connection more stable and tight to prevent them from loosening, and also facilitate the disassembly and replacement of the valve disc 5. When the valve disc 5 is assembled, the valve cover 2 can be connected to the valve body 1 through the flange, and then the pipeline can be connected to the flanges at both ends of the valve body 1 to allow the flow of medium. When high-temperature medium circulates inside, the metal expansion joint 18 in the regulating groove 16 can be heated and extended, which can drive the valve stem 15 to be pressed down. When the valve stem 15 is pressed down, the outer spring 19 can be stretched together to make its stretching more stable, so that the valve stem 15 drives the connected valve disc 5 to be pressed down to contact the valve seat 9, which can cut off the high-temperature medium and prevent the high-temperature medium from directly circulating and causing damage to the equipment. When the temperature drops, the metal expansion joint 18 can be contracted.Drive the valve disc 5 to open the medium flow;

[0022] A center block 8 is provided in the middle of the bottom of the valve disc 5, and connecting rods 6 are provided on both sides of the bottom of the center block 8. An annular brush 7 is provided on the outside of the connecting rod 6. When the valve disc 5 moves up and down to open or close the valve, the center block 8 at the bottom can drive the annular brush 7 to move together through the connecting rod 6, so that the annular brush 7 can clean the inside of the valve seat 9 to prevent dust and impurities in the medium from adhering to the inside of the valve seat 9 and affecting its valve closing effect.

[0023] The connecting blocks 13 in the middle of the four sides of the regulating tank 16 are all provided with liquid inlet grooves 17, and the connecting blocks 3 at the top outer ends of the liquid inlet grooves 17 are all provided with downwardly inclined baffles 23. When the high-temperature medium flows, the baffles 23 can block the medium and allow it to pass through the liquid inlet grooves 17 and enter the regulating tank 16. This allows the medium to contact the metal expansion joint 18 in time, preventing the metal expansion joint 18 from reacting slowly and causing the high-temperature medium to continue to flow.

[0024] When the embodiment of the present application is in use, the staff aligns the U-shaped block 13 at the bottom of the valve stem 15 with the slot 22 on the connecting block 2 10, and then inserts the plug 21 at the bottom of the U-shaped block 13 into the slot 20 for preliminary positioning. Then, the fixing bolt 14 is used to fix the U-shaped block 13 on the connecting block 2 10, and then the screw 12 is screwed through the plug 21, the U-shaped block 13 and the connecting block 2 10, and the nuts 11 are screwed on both ends to limit and fix them. The U-shaped block 13 and the connecting block 2 10 can be fixed for a second time, which can make their connection more stable and tight to prevent them from loosening, and also facilitate the disassembly and replacement of the valve disc 5. When the valve disc 5 is assembled, the valve cover 2 can be connected to the valve body 1 through the flange, and then the pipeline is connected to the flanges at both ends of the valve body 1. The medium can flow through. When high-temperature medium flows inside, the medium can be blocked by the function of the flow shield 23. It is allowed to enter the regulating groove 16 through the liquid inlet groove 17, so that the medium can contact the metal expansion joint 18 in time, preventing the metal expansion joint 18 from reacting slowly and causing the high-temperature medium to continue to circulate. Then the metal expansion joint 18 in the regulating groove 16 can be extended by the heat, which can drive the valve stem 15 to be pressed down. When the valve stem 15 is pressed down, the outer spring 19 can be stretched and retracted together, making its stretching more stable, so that the valve stem 15 drives the connected valve disc 5 to be pressed down and contact the valve seat 9, which can intercept the high-temperature medium and prevent the high-temperature medium from directly circulating and causing damage to the equipment. When the temperature drops, the metal expansion joint 18 can be contracted, driving the valve disc 5 to open the medium circulation. When the valve disc 5 moves up and down to open or close the valve, the center block 8 at the bottom can be driven by the connecting rod 6 to move the annular brush 7 together, so that the annular brush 7 can clean the inside of the valve seat 9 to prevent dust and impurities in the medium from adhering to the inside of the valve seat 9 and affecting its valve closing effect.

[0025] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A temperature-adjustable mechanical high-temperature shut-off valve, characterized by: The invention comprises a valve body (1) and a valve cover (2), wherein the middle position of the top of the valve body (1) is connected to the valve cover (2) via a flange, and an annular sealing sheet (4) is provided at the connection between the valve cover (2) and the valve body (1), a connecting block (3) is provided at the middle position of the bottom of the valve cover (2), and an adjusting groove (16) is provided at the bottom of the connecting block (3), a metal expansion joint (18) is provided at the middle position of the top of the adjusting groove (16), and a valve stem (15) is provided at the bottom of the metal expansion joint (18), and the bottom of the valve stem (15) is provided with a valve rod. The U-shaped card block (13) is provided at the bottom of the inner side of the U-shaped card block (13), and a connecting block 2 (10) is provided at the middle position of the top of the connecting block 2 (10) corresponding to the U-shaped card block (13), and the connecting block 2 (10) is connected to the card slot (22) of the U-shaped card block (13), and both ends of the top of the connecting block 2 (10) and the U-shaped card block (13) are evenly provided with threaded holes, and the threaded holes in the tops of the connecting block 2 (10) and the U-shaped card block (13) are both threadedly connected with fixing bolts (14).

2. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 1, characterized in that: A valve flap (5) is provided at the bottom of the second connecting block (10), and a valve seat (9) is provided at a middle position of the valve flap (5) corresponding to the valve body (1).

3. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 2, characterized in that: A center block (8) is provided at the middle position of the bottom of the valve disc (5), and connecting rods (6) are provided on both sides of the bottom end of the center block (8), and an annular brush (7) is provided on the outer side of the connecting rod (6).

4. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 1, characterized in that: An insert block (21) is provided at the middle position of the bottom inner side of the U-shaped card block (13), and a slot (20) is provided in the second connecting block (10) corresponding to the insert block (21) inside the U-shaped card block (13), and the inner side of the U-shaped card block (13) is plugged into the slot (20) of the second connecting block (10) through the insert block (21).

5. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 4, characterized in that: Threaded bearings are provided at corresponding intermediate positions of the insert block (21), the U-shaped clamping block (13) and the second connecting block (10), and screw rods (12) are connected to the threaded bearings of the insert block (21), the U-shaped clamping block (13) and the second connecting block (10) through threads, and nuts (11) are connected to both ends of the screw rod (12) through threads.

6. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 1, characterized in that: A spring (19) is provided on the outer side of the valve stem (15), and the top end of the spring (19) is connected to the adjustment groove (16), and the bottom end of the spring (19) is connected to the top of the U-shaped block (13).

7. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 1, characterized in that: The connecting blocks (3) in the middle of the four sides of the regulating groove (16) are all provided with liquid inlet grooves (17), and the connecting blocks (3) at the top ends of the outer sides of the liquid inlet grooves (17) are all provided with flow shields (23) with downward slant surfaces.

8. The temperature-adjustable mechanical high-temperature shut-off valve according to claim 1, characterized in that: Both ends of the valve body (1) pipeline are provided with flanges, and the internal parts of the valve body (1) are all made of high-temperature resistant materials.

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