Low-temperature-resistant valve closing structure

Abstract

The utility model discloses a low-temperature-resistant valve closing structure, and relates to the technical field of valves. The low-temperature-resistant valve closing structure comprises a valve rod and further comprises a blocking assembly, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod, and the blocking assembly is arranged under the valve rod and used for blocking a valve; the sealing assembly is arranged on the outer side wall of the plugging assembly and is close to the lower position, and the sealing assembly is used for enhancing the sealing performance of the plugging assembly on valve plugging; the valve comprises a valve rod, a plugging assembly and a connecting assembly, the connecting assembly is arranged in the middle of the surface of the top of the plugging assembly, an inner cavity of the connecting assembly is connected with the bottom end of the valve rod, the connecting assembly is used for installing the valve rod on the plugging assembly, and the plugging assembly comprises a ceramic valve clack. Therefore, the influence of the cold medium on the valve closing structure can be prevented, and the closing safety of the valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a low-temperature resistant valve closure structure. Background Art

[0002] The valve closure structure refers to the closing part of the valve, also called the valve valve or valve disc. It is the core component of the valve and is used to control the flow of the medium. The structural design of the valve closure is related to the type, purpose and working conditions of the valve. Common valve closure structures include valve disc type closures, plug type closures, ball closures, etc. Among them, the valve disc type closure controls the flow of the medium by opening and closing the valve disc. It is usually a straight-through or cut-off structure, that is, the valve disc can be fully opened or fully closed. This structure is suitable for applications that require quick closure.

[0003] However, when the existing valve flap type closure is in use, when the valve conveys low-temperature media, the valve flap is prone to shrink at low temperatures, causing the media to leak from the valve flap seal, thereby reducing the safety of valve closure. Therefore, we propose a low-temperature resistant valve closure structure to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a low-temperature resistant valve closure structure, which solves the problem that when the valve transports low-temperature media, the valve disc is prone to shrink at low temperatures, causing the media to leak from the valve disc seal, thereby reducing the safety of valve closure.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a low temperature resistant valve closing structure, including a valve stem, and also including:

[0006] A plugging assembly, which is arranged directly below the valve stem and is used to plug the valve;

[0007] A sealing component, which is disposed on the outer side wall of the blocking component and at a lower position, and is used to enhance the sealing performance of the blocking component on the valve; and

[0008] A connecting component is arranged in the middle of the top surface of the plugging component, and the inner cavity of the connecting component is connected to the bottom end of the valve stem. The connecting component is used to install the valve stem on the plugging component.

[0009] Preferably, the blocking component comprises a ceramic valve disc, and an annular groove for plugging the sealing component is provided on the side wall of the outer wall of the ceramic valve disc near the bottom end;

[0010] The inner wall of the annular groove is provided with a tongue and tongue groove, and the tongue and tongue groove is connected with the inner wall of the sealing component by clamping;

[0011] A limiting groove for plugging the connecting component is provided in the middle of the top surface of the ceramic valve disc, and a plurality of internal threaded tubes are inlaid on the bottom surface of the inner cavity of the limiting groove.

[0012] Preferably, the sealing assembly comprises low-temperature resistant silicone rubber disposed in the inner cavity of the annular groove, and the inner wall of the low-temperature resistant silicone rubber is provided with a tenon for inserting into the tenon groove.

[0013] Preferably, the tenons and the tenons are provided in plurality, and the tenons and the tenons are distributed in a circular array, and each tenon corresponds to each tenon groove one by one.

[0014] Preferably, the inner cavity of the low-temperature resistant silicone rubber is provided with a receiving groove, and the inner cavity of the receiving groove is provided with an inner support ring.

[0015] Preferably, the connection assembly comprises a bottom plate arranged in the inner cavity of the limiting groove, a plurality of through holes are provided on the top surface of the bottom plate and near the peripheral side, and a positioning screw is inserted into the inner cavity of each through hole, and the bottom end of the positioning screw is rotatably connected to the inner cavity of the internal threaded tube;

[0016] A fixing sleeve for inserting the bottom end of the valve stem is arranged in the middle of the top surface of the bottom plate, a screw hole is opened on one side wall of the fixing sleeve, and a fixing screw is rotatably connected to the inner cavity of the screw hole, and one end of the fixing screw is inserted into the side wall of the valve stem.

[0017] Preferably, the outer diameter of the bottom plate is the same as the inner diameter of the limiting groove, and the two form an embedded structure.

[0018] Beneficial Effects

[0019] The utility model provides a low temperature resistant valve closure structure. Compared with the prior art, it has the following beneficial effects:

[0020] The low-temperature resistant valve closing structure can be installed on the sealing component through the valve stem and the connecting component, thereby driving the sealing component to move up and down, and then enabling the sealing component to seal the inside of the valve. Since the sealing component is installed on the outer wall of the sealing component and is in a lower position, when the valve stem drives the sealing component to move downward to seal the inside of the valve, the sealing component will strengthen the sealing between the edge of the outer wall of the sealing component and the inside of the valve, thereby preventing leakage of the medium after the sealing component is sealed, thereby ensuring the safety of the valve closure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the plugging component of the utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the plugging component of the utility model;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing component of the utility model;

[0026] Figure 6 This is a schematic diagram of the exploded structure of the connection component of the utility model.

[0027] In the figure: 1. valve stem; 2. sealing assembly; 21. ceramic valve disc; 22. annular groove; 23. tenon groove; 24. limiting groove; 25. internal threaded pipe; 3. sealing assembly; 31. low temperature resistant silicone rubber; 32. tenon; 33. receiving groove; 34. inner support ring; 4. connecting assembly; 41. bottom plate; 42. through hole; 43. positioning screw; 44. stabilizing sleeve; 45. screw hole; 46. fixing screw. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-2 The utility model provides a technical solution: a low-temperature resistant valve closing substructure, including a valve stem 1, and also including: a plugging component 2, which is arranged directly below the valve stem 1 and is used to plug the valve; a sealing component 3, which is arranged on the outer wall of the plugging component 2 and at a lower position, and is used to enhance the sealing performance of the plugging component 2 on the valve plugging; and a connecting component 4, which is arranged in the middle of the top surface of the plugging component 2, and the inner cavity of the connecting component 4 is connected to the bottom end of the valve stem 1, and the connecting component 4 is used to install the valve stem 1 on the plugging component 2;

[0030] Through the valve stem 1, it can be installed on the sealing component 2 through the connecting component 4, so that it can drive the sealing component 2 to move up and down, and then enable the sealing component 2 to seal the inside of the valve. Since the sealing component 3 is installed on the outer wall of the sealing component 2 and in a lower position, when the valve stem 1 drives the sealing component 2 to move downward to seal the inside of the valve, the sealing component 3 will strengthen the sealing between the edge of the outer wall of the sealing component 2 and the inside of the valve, thereby preventing the leakage of the medium after the sealing component 2 is sealed, thereby ensuring the safety of the valve closure.

[0031] See also Figure 1-Figure 4 The plugging component 2 includes a ceramic valve disc 21, and an annular groove 22 for plugging the sealing component 3 is provided on the side wall of the outer wall of the ceramic valve disc 21 and near the bottom end; a tenon groove 23 is provided on the inner wall of the annular groove 22, and the tenon groove 23 is connected to the inner wall of the sealing component 3 by clamping; a limiting groove 24 for plugging the connecting component 4 is provided in the middle of the top surface of the ceramic valve disc 21, and a plurality of internal threaded tubes 25 are inlaid on the bottom surface of the inner cavity of the limiting groove 24;

[0032] The ceramic valve flap 21 in the sealing component 2 can not only ensure its structural strength during use, but also prevent its pre-cooling shrinkage and deformation, thereby improving the sealing performance of the ceramic valve flap 21 on the internal sealing of the valve. At the same time, the ceramic valve flap 21 can provide an installation basis for the sealing component 3 through the annular groove 22 and the tenon groove 23, thereby ensuring the stability of the use of the sealing component 3. Then, the bottom end of the connecting component 4 can be installed through the limiting groove 24 on the ceramic valve flap 21, and the connecting component 4 can be stably connected through the multiple internal threaded tubes 25 in the limiting groove 24, thereby facilitating the synchronous lifting and lowering of the ceramic valve flap 21 following the valve stem 1.

[0033] See also Figure 3 , Figure 5 The sealing component 3 includes a low-temperature resistant silicone rubber 31 disposed in the inner cavity of the annular groove 22, and a tenon 32 for inserting the tenon groove 23 is disposed on the inner wall of the low-temperature resistant silicone rubber 31, and a plurality of tenons 32 and tenon grooves 23 are disposed, and the tenons 32 and tenon grooves 23 are distributed in a circular array, and each tenon 32 corresponds to each tenon groove 23 one by one, and a receiving groove 33 is provided in the inner cavity of the low-temperature resistant silicone rubber 31, and an inner support ring 34 is disposed in the inner cavity of the receiving groove 33;

[0034] The low-temperature resistant silicone rubber 31 in the sealing component 3 can prevent itself from deforming at low temperatures and can be installed in the inner cavity of the annular groove 22, so that the ceramic valve disc 21 can strengthen its sealing with the inside of the valve when blocking, so as to prevent medium leakage and improve the safety of valve closure. Since the inner wall of the low-temperature resistant silicone rubber 31 is provided with a tenon 32 for plugging into the tenon groove 23, the stability of the low-temperature resistant silicone rubber 31 installed in the annular groove 22 can be improved under the engagement of the tenon groove 23 and the tenon 32, so as to be able to To prevent it from loosening and falling off, since there are multiple tenons 32 and tenons 23, and the tenons 32 and tenons 23 are distributed in a circular array, and each tenon 32 corresponds to each tenon 23 one by one, the firmness of the low-temperature resistant silicone rubber 31 installed in the annular groove 22 can be further improved. Since the inner cavity of the low-temperature resistant silicone rubber 31 is provided with a receiving groove 33, and the inner cavity of the receiving groove 33 is provided with an inner support ring 34, the deformation resistance of the low-temperature resistant silicone rubber 31 can be improved, and the service life of the low-temperature resistant silicone rubber 31 can be improved.

[0035] See also Figure 4 , Figure 6 The connection assembly 4 includes a bottom plate 41 arranged in the inner cavity of the limiting groove 24, and a plurality of through holes 42 are provided on the top surface of the bottom plate 41 and near the peripheral position, and a positioning screw 43 is inserted into the inner cavity of each through hole 42, and the bottom end of the positioning screw 43 is rotatably connected to the inner cavity of the internal threaded tube 25; a fixing sleeve 44 for inserting the bottom end of the valve stem 1 is provided in the middle of the top surface of the bottom plate 41, and a screw hole 45 is provided on one side wall of the fixing sleeve 44, and a fixing screw 46 is rotatably connected to the inner cavity of the screw hole 45, and one end of the fixing screw 46 is inserted into the side wall of the valve stem 1;

[0036] Through the base plate 41 in the connecting component 4, it can be installed in the inner cavity of the limit groove 24, and the through hole 42 and the positioning screw 43 can be fixed on the internal threaded tube 25, thereby improving the stability of the base plate 41 installed on the ceramic valve disc 21, and at the same time, the fixing sleeve 44 can be installed and fixed. When the valve stem 1 needs to be installed, at this time, the valve stem 1 is inserted into the inner cavity of the fixing sleeve 44, and then the fixing screw 46 in the screw hole 45 is rotated, so that one end of the valve stem 1 can be inserted into the side wall of the valve stem 1, thereby improving the firmness of the valve stem 1 installed on the fixing sleeve 44, so that the valve stem 1 can move up and down with the ceramic valve disc 21.

[0037] See also Figure 4 , Figure 6 The outer diameter of the bottom plate 41 is the same as the inner diameter of the limiting groove 24 , and the two form an embedded structure, which can improve the stability of the bottom plate 41 installed in the limiting groove 24 .

[0038] During operation, the valve stem 1 can be installed on the sealing component 2 through the connecting component 4, so as to drive the sealing component 2 to move up and down, and then enable the sealing component 2 to seal the inside of the valve. Since the sealing component 3 is installed on the outer wall of the sealing component 2 and in a lower position, when the valve stem 1 drives the sealing component 2 to move downward to seal the inside of the valve, the sealing component 3 will strengthen the sealing between the edge of the outer wall of the sealing component 2 and the inside of the valve, thereby preventing the leakage of the medium after the sealing component 2 is sealed, thereby ensuring the safety of the valve closure.

[0039] The ceramic valve flap 21 in the sealing component 2 can not only ensure its structural strength during use, but also prevent its pre-cooling shrinkage and deformation, thereby improving the sealing performance of the ceramic valve flap 21 on the internal sealing of the valve. At the same time, the ceramic valve flap 21 can provide an installation basis for the sealing component 3 through the annular groove 22 and the tenon groove 23, thereby ensuring the stability of the use of the sealing component 3. Then, the bottom end of the connecting component 4 can be installed through the limiting groove 24 on the ceramic valve flap 21, and the connecting component 4 can be stably connected through the multiple internal threaded tubes 25 in the limiting groove 24, thereby facilitating the synchronous lifting and lowering of the ceramic valve flap 21 following the valve stem 1.

[0040] The low-temperature resistant silicone rubber 31 in the sealing component 3 can prevent itself from deforming at low temperatures and can be installed in the inner cavity of the annular groove 22, so that the ceramic valve disc 21 can strengthen its sealing with the inside of the valve when blocking, so as to prevent medium leakage and improve the safety of valve closure. Since the inner wall of the low-temperature resistant silicone rubber 31 is provided with a tenon 32 for plugging into the tenon groove 23, the stability of the low-temperature resistant silicone rubber 31 installed in the annular groove 22 can be improved under the engagement of the tenon groove 23 and the tenon 32, so as to be able to To prevent it from loosening and falling off, since there are multiple tenons 32 and tenons 23, and the tenons 32 and tenons 23 are distributed in a circular array, and each tenon 32 corresponds to each tenon 23 one by one, the firmness of the low-temperature resistant silicone rubber 31 installed in the annular groove 22 can be further improved. Since the inner cavity of the low-temperature resistant silicone rubber 31 is provided with a receiving groove 33, and the inner cavity of the receiving groove 33 is provided with an inner support ring 34, the deformation resistance of the low-temperature resistant silicone rubber 31 can be improved, and the service life of the low-temperature resistant silicone rubber 31 can be improved.

[0041] Through the base plate 41 in the connecting component 4, it can be installed in the inner cavity of the limit groove 24, and the through hole 42 and the positioning screw 43 can be fixed on the internal threaded tube 25, thereby improving the stability of the base plate 41 installed on the ceramic valve disc 21, and at the same time, the fixing sleeve 44 can be installed and fixed. When the valve stem 1 needs to be installed, at this time, the valve stem 1 is inserted into the inner cavity of the fixing sleeve 44, and then the fixing screw 46 in the screw hole 45 is rotated, so that one end of the valve stem 1 can be inserted into the side wall of the valve stem 1, thereby improving the firmness of the valve stem 1 installed on the fixing sleeve 44, so that the valve stem 1 can move up and down with the ceramic valve disc 21.

[0042] In summary, the device can improve the stability of the valve when it is closed, thereby preventing the cold medium from affecting the valve closing structure, thereby ensuring the safety of the valve closing.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A low temperature resistant valve closure structure, comprising a valve stem (1), characterized in that: Also includes: A plugging component (2), the plugging component (2) being arranged directly below the valve stem (1), and the plugging component (2) being used to plug the valve; A sealing component (3), the sealing component (3) being arranged on the outer side wall of the blocking component (2) and at a lower position, the sealing component (3) being used to enhance the sealing performance of the blocking component (2) in blocking the valve; as well as A connecting component (4), the connecting component (4) being arranged in the middle of the top surface of the plugging component (2), and the inner cavity of the connecting component (4) being connected to the bottom end of the valve stem (1), the connecting component (4) being used to mount the valve stem (1) on the plugging component (2); The plugging component (2) comprises a ceramic valve flap (21), and an annular groove (22) for plugging the sealing component (3) is provided on the side wall of the outer wall of the ceramic valve flap (21) near the bottom end; The inner wall of the annular groove (22) is provided with a tongue and tongue groove (23), and the tongue and tongue groove (23) is connected to the inner wall of the sealing component (3) by snapping; A limiting groove (24) for plugging the connecting assembly (4) is provided in the middle of the top surface of the ceramic valve flap (21), and a plurality of internally threaded tubes (25) are inlaid on the bottom surface of the inner cavity of the limiting groove (24).

2. A low temperature resistant valve closure structure according to claim 1, characterized in that: The sealing assembly (3) comprises a low-temperature resistant silicone rubber (31) arranged in the inner cavity of the annular groove (22), and the inner wall of the low-temperature resistant silicone rubber (31) is provided with a tenon (32) for inserting into the tenon groove (23).

3. A low temperature resistant valve closure structure according to claim 2, characterized in that: The tenons (32) and the tenons (23) are provided in plurality, and the tenons (32) and the tenons (23) are distributed in a circular array, and each tenon (32) corresponds to each tenon (23).

4. A low temperature resistant valve closure structure according to claim 2, characterized in that: The inner cavity of the low-temperature resistant silicone rubber (31) is provided with a receiving groove (33), and the inner cavity of the receiving groove (33) is provided with an inner support ring (34).

5. A low temperature resistant valve closure structure according to claim 1, characterized in that: The connecting assembly (4) comprises a bottom plate (41) arranged in the inner cavity of the limiting groove (24), a plurality of through holes (42) are provided on the top surface of the bottom plate (41) and near the peripheral side, and a positioning screw (43) is inserted into the inner cavity of each through hole (42), and the bottom end of the positioning screw (43) is rotatably connected to the inner cavity of the internal threaded tube (25); A fixing sleeve (44) for inserting the bottom end of the valve stem (1) is provided in the middle of the top surface of the bottom plate (41), a screw hole (45) is provided on one side wall of the fixing sleeve (44), and a fixing screw (46) is rotatably connected to the inner cavity of the screw hole (45), and one end of the fixing screw (46) is inserted into the side wall of the valve stem (1).

6. A low temperature resistant valve closure structure according to claim 5, characterized in that: The outer diameter of the bottom plate (41) is the same as the inner diameter of the limiting groove (24), and the two form an embedded structure.

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