Water-cooling gate valve plate cooling water pipe sealing assembly and water-cooling gate valve

Abstract

The utility model relates to the technical field of sealing devices, in particular to a water-cooling gate valve plate cooling water pipe sealing assembly. The utility model provides a water-cooling gate valve plate cooling water pipe sealing assembly which is characterized in that the water-cooling gate valve plate cooling water pipe sealing assembly comprises a first flange, a second flange and a third flange, the second flange is arranged between the first flange and the third flange, and the centers of the first flange, the second flange and the third flange are axially overlapped; the first flange is provided with a first flange short section, a valve rod of a water-cooling gate valve plate cooling water pipe is connected into the first flange short section in a threaded mode, and a first sealing piece is arranged at the end, arranged in the first flange short section, of the valve rod. The second flange is provided with a second flange short section, the second flange short section is arranged in the first flange short section, and the end of the second flange short section abuts against the first sealing piece. And a second sealing piece is arranged between the third flange and the second flange. According to the technical scheme, the technical problem that water leaks at the joint of the valve rod and the cooling water pipe of the water-cooling gate valve in the hot-blast stove area can be effectively solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sealing devices, and in particular to a water-cooled gate valve plate cooling water pipe sealing assembly and a water-cooled gate valve. Background Art

[0002] The cooling water pressure used by the existing water-cooled gate valves in the hot blast furnace area is approximately 7 kg. This constant circulation of cooling water ensures the cooling effect of the water-cooled gate valves, meeting production needs and ensuring normal operation. This constant circulation of high-pressure water places high demands on the sealing of the various connections in the cooling water pipes of the water-cooled gate valves.

[0003] In existing technology, the cooling water pipes for water-cooled gate valve discs are sealed by installing a sealing gasket between the upper and lower flange nipples. The threaded connection between the lower flange nipple and the valve stem is sealed by wrapping hemp rope and applying lead oil. Due to on-site working conditions or improper installation procedures during the lower flange nipple installation, water leakage often occurs at the threaded connection between the lower flange nipple and the valve stem. Long-term leakage wastes water resources, affects the cooling effect of the valve disc, and in severe cases, may burn the valve disc. Utility Model Content

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, in a first aspect of the present disclosure, a water-cooled gate valve plate cooling water pipe sealing assembly is provided, comprising a first flange, a second flange, and a third flange, wherein the second flange is arranged between the first flange and the third flange, and the centers of the first flange, the second flange, and the third flange are arranged to overlap axially, wherein:

[0006] The first flange has a first flange nipple, a valve stem of a cooling water pipe of a water-cooled gate valve plate is screwed into the first flange nipple, and a first sealing member is provided at an end of the valve stem disposed in the first flange nipple;

[0007] The second flange has a second flange short section, the second flange short section is arranged inside the first flange short section, and an end portion of the second flange short section abuts against the first sealing member;

[0008] A second sealing member is provided between the third flange and the second flange.

[0009] In a feasible embodiment, the first flange short section is provided with a positioning hole, which extends from the outer wall of the first flange short section toward the valve stem. A fixing piece is provided in the positioning hole, which is used to prevent the first flange short section from loosening from the valve stem.

[0010] In a feasible implementation manner, the center hole distance, hole diameter and number of holes of the first flange, the second flange and the third flange are the same.

[0011] In a feasible implementation manner, the first flange, the second flange, and the third flange are connected by bolts.

[0012] In a feasible embodiment, the first flange, the second flange and the third flange are provided with a plurality of bolt holes, and the bolt holes are evenly distributed along the circumference of the first flange, the second flange and the third flange.

[0013] In a feasible embodiment, the first sealing member is configured as a sealing ring, and the width of the sealing ring from the inner diameter to the outer diameter is equal to the width of the valve stem from the inner diameter to the outer diameter.

[0014] In a feasible implementation manner, the sealing ring is configured as a circular fluororubber sealing ring.

[0015] In a feasible embodiment, the second sealing member is provided with a sealing gasket.

[0016] In a feasible embodiment, the sealing gasket is configured as a circular graphite gasket.

[0017] In a second aspect of the present disclosure, a water-cooled gate valve is provided, comprising the above-mentioned water-cooled gate valve valve plate cooling water pipe sealing assembly.

[0018] Compared with the prior art, the present disclosure has at least the following beneficial effects: the present disclosure arranges a second flange between the first flange and the third flange to form a three-flange structure, and the second flange short section is embedded in the first flange short section, and a first seal is also arranged between the second flange short section and the valve stem, which can achieve a better sealing effect to prevent water leakage; and a second seal is also arranged between the second flange and the main body of the third flange, and the tightening force when the two are connected forms an extrusion pressure on the sealing gasket to achieve a sealing effect. This technical solution effectively solves the technical problem of water leakage at the cooling water pipe joint of the valve stem of the water-cooled gate valve in the hot blast furnace area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the exemplary embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered limiting of the present application. Throughout the accompanying drawings, the same reference symbols denote the same components. In the accompanying drawings:

[0022] Figure 1 It is a front view structural schematic diagram of the present disclosure;

[0023] Figure 2 Schematic diagram of the top structure of the first flange, the second flange, and the third flange of the present disclosure;

[0024] Figure 3 Schematic diagram of the sealing structure disclosed in the present invention.

[0025] in, Figures 1 to 3 The correspondence between the figure numbers and the component names is: 1-first flange; 11-first flange short section; 2-second flange; 21-second flange short section; 3-third flange; 4-first seal; 5-second seal; 6-positioning hole; 7-valve stem; 8-bolt; 9-bolt hole. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0028] Currently, the existing technology for sealing the cooling water pipes for water-cooled gate valve discs involves installing a sealing gasket between the upper and lower flange nipples. The threaded connection between the lower flange nipple and the valve stem is sealed by wrapping hemp rope and applying lead oil. Due to on-site operating conditions or improper installation procedures during the lower flange nipple installation, water leakage often occurs at the threaded connection between the lower flange nipple and the valve stem. Long-term leakage wastes water resources, affects the cooling efficiency of the valve disc, and in severe cases, can burn the valve disc.

[0029] Based on this, an embodiment of the present disclosure provides a water-cooled gate valve plate cooling water pipe sealing assembly. The present disclosure arranges a second flange between the first flange and the third flange to form a three-flange structure, and the second flange short section is embedded in the first flange short section. At the same time, a first sealing component is also arranged between the second flange short section and the valve stem to achieve a better sealing effect to prevent water leakage; and a second sealing component is also arranged between the main bodies of the second flange and the third flange. The tightening force when the two are connected forms an extrusion pressure on the sealing gasket to achieve a sealing effect. This technical solution effectively solves the technical problem of water leakage at the connection point of the cooling water pipe of the water-cooled gate valve stem in the hot blast furnace area.

[0030] The following is a detailed description of the water-cooled gate valve plate cooling water pipe sealing assembly through a specific embodiment:

[0031] Reference Figures 1 to 3 As shown, in a first aspect of the present disclosure, a water-cooled gate valve plate cooling water pipe sealing assembly is provided, comprising a first flange 1, a second flange 2 and a third flange 3, the second flange 2 being arranged between the first flange 1 and the third flange 3, and the centers of the first flange 1, the second flange 2 and the third flange 3 being arranged to overlap axially, the first flange 1 having a first flange short section 11, the valve stem 7 of the water-cooled gate valve plate cooling water pipe being screwed into the first flange short section 11, and the end of the valve stem 7 arranged in the first flange short section 11 being provided with a first seal 4; the second flange 2 having a second flange short section 21, the second flange short section 21 being arranged inside the first flange short section 11, and the end of the second flange short section 21 abutting against the first seal 4; a second seal 5 being provided between the third flange 3 and the second flange 2.

[0032] The present invention sets a second flange 2 between the first flange 1 and the third flange 3 to form a three-flange structure, and the second flange short section 21 is embedded in the first flange short section 11. At the same time, a first seal 4 is also set between the second flange short section 21 and the valve stem 8, thereby achieving a better sealing effect to prevent water leakage; and a second seal 5 is also set between the second flange 2 and the body of the third flange 3. The tightening force when the two are connected forms an extrusion force on the sealing gasket to achieve a sealing effect. This technical solution effectively solves the technical problem of water leakage at the connection point of the cooling water pipe of the water-cooled gate valve stem in the hot blast furnace area. Specifically, the outer diameter of the second flange short section 21 matches the inner diameter of the first flange short section 11 so that it can be embedded and its theoretical fitting clearance is 0 to prevent water leakage. The length of the second flange short section 21 is designed based on the difference between the length of the first flange short section 1 and the threaded fitting length of the valve stem 8. Finally, under the pressure of the three flange connection, the first seal 4 is subjected to an extrusion force to achieve the sealing effect here.

[0033] In some embodiments, the first flange sub 11 is provided with a positioning hole 6, which extends from the outer wall of the first flange sub 11 toward the valve stem 7. A fixing member is provided in the positioning hole 6 to prevent the first flange sub 11 from loosening from the valve stem 7.

[0034] In this embodiment, the first flange sub 11 is provided with a positioning hole 6, which is provided on the outer wall of the first flange sub 11 and can be provided as a straight through hole extending from the outer wall of the first flange sub 11 toward the valve stem 7. The positioning hole 6 of the present disclosure can serve a positioning function. For example, when the first flange sub 11 is threadedly connected to the valve stem, the mark provided on the valve stem thread can be observed through the positioning hole 6 to determine the connection position of the first flange sub 11 and the valve stem 8. Furthermore, a fixing member is provided in the positioning hole 6, which is used to prevent the first flange sub 11 from loosening from the valve stem 7. The fixing member can be a bolt, a jackscrew, etc., and the present disclosure specifically uses a fixing bolt. The inner wall of the positioning hole is provided with a thread that matches the fixing bolt.

[0035] In some embodiments, the center-to-center hole spacing, hole diameter, and number of holes of the first flange 1, the second flange 2, and the third flange 3 are identical, thereby balancing the pressure generated by the fixed connection of the first flange 1, the second flange 2, and the third flange 3 in all directions, thereby ensuring the airtightness and stability of the connection. Furthermore, the first flange 1, the second flange 2, and the third flange 3 are connected by bolts 8.

[0036] In some embodiments, the first flange 1, the second flange 2, and the third flange 3 are provided with a plurality of bolt holes 9. The bolt holes 9 are evenly distributed along the circumference of the first flange 1, the second flange 2, and the third flange 3. This further balances the pressure generated by the fixed connection of the first flange 1, the second flange 2, and the third flange 3 in all directions, thereby ensuring the airtightness and stability of the connection. Specifically, the number of bolt holes 9 is set to 8.

[0037] In some embodiments, the first sealing element 4 is configured as a sealing ring, where the width from the inner diameter to the outer diameter of the sealing ring is equal to the width from the inner diameter to the outer diameter of the valve stem 7, thereby achieving a better sealing effect. Furthermore, the sealing ring is configured as a circular fluororubber sealing ring, which exhibits excellent high-temperature resistance. The most prominent feature of a fluororubber sealing ring is its high-temperature resistance. It can operate for long periods of time in operating conditions between 200°C and 250°C, and is not limited to this, even operating for short periods at temperatures up to 300°C. The tensile strength and hardness of fluororubber are inversely proportional to temperature. Below 150°C, the strength begins to decrease with increasing temperature. Between 150°C and 260°C, the rate of decrease gradually stabilizes with increasing temperature. Another outstanding feature of the fluororubber skeleton oil seal is its low-temperature performance. It maintains elasticity within a temperature range of -20°C. However, as the temperature decreases, its tensile strength increases, and it hardens at low temperatures, making it more suitable for the temperature requirements of the cooling water pipes used to seal the valve plate of a water-cooled gate valve.

[0038] In some embodiments, the second sealing member 5 is provided with a sealing gasket. Furthermore, the sealing gasket is provided as a circular graphite gasket. The graphite gasket is cut or stamped from a pure graphite plate or a metal reinforced graphite plate, and has a variety of sealing properties, such as thermal stability, self-lubrication, corrosion resistance, no aging, no brittleness, etc. These properties enable it to be used stably for a long time under harsh working conditions with minimal maintenance requirements. The special lubricating properties of the graphite gasket allow it to be used to reduce the friction of mechanical parts and extend the service life of the equipment. It can withstand high and low temperatures, is corrosion-resistant, and is suitable for various corrosive chemical fluids, such as strong alkali, hydrochloric acid, sulfuric acid and other highly corrosive liquids and organic solvents. In addition, the special lubricating properties of the graphite gasket allow it to be used to reduce the friction of mechanical parts and extend the service life of the equipment.

[0039] In a second aspect of the present disclosure, a water-cooled gate valve is provided, comprising the above-mentioned water-cooled gate valve valve plate cooling water pipe sealing assembly.

[0040] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0041] In the description of the present disclosure, it is to be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, cannot be understood as a limitation on the present disclosure.

[0042] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A water-cooled gate valve plate cooling water pipe sealing assembly, characterized in that: The invention comprises a first flange, a second flange and a third flange, wherein the second flange is arranged between the first flange and the third flange, and the centers of the first flange, the second flange and the third flange are axially overlapped, wherein: The first flange has a first flange nipple, a valve stem of a cooling water pipe of a water-cooled gate valve plate is screwed into the first flange nipple, and a first sealing member is provided at an end of the valve stem disposed in the first flange nipple; The second flange has a second flange short section, the second flange short section is arranged inside the first flange short section, and an end portion of the second flange short section abuts against the first sealing member; A second sealing member is provided between the third flange and the second flange.

2. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The first flange sub is provided with a positioning hole, which extends from the outer wall of the first flange sub toward the valve stem. A fixing piece is provided in the positioning hole, which is used to prevent the first flange sub from loosening from the valve stem.

3. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The first flange, the second flange and the third flange have the same center hole distance, hole diameter and hole number.

4. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The first flange, the second flange and the third flange are connected by bolts.

5. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The first flange, the second flange, and the third flange are provided with a plurality of bolt holes, and the bolt holes are evenly distributed along the circumference of the first flange, the second flange, and the third flange.

6. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The first sealing member is configured as a sealing ring, and the width of the sealing ring from the inner diameter to the outer diameter is equal to the width of the valve stem from the inner diameter to the outer diameter.

7. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 6, characterized in that: The sealing ring is configured as a circular fluororubber sealing ring.

8. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 1, characterized in that: The second sealing member is provided with a sealing gasket.

9. The water-cooled gate valve plate cooling water pipe sealing assembly according to claim 8, characterized in that: The sealing gasket is configured as a circular graphite gasket.

10. A water-cooled gate valve, characterized in that: The water-cooled gate valve plate cooling water pipe sealing assembly comprises the water-cooled gate valve plate cooling water pipe sealing assembly according to any one of claims 1 to 9.

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