High-pressure-resistant gate valve sealing structure

Abstract

The utility model relates to the technical field of gate valves, in particular to a high-pressure-resistant gate valve sealing structure which comprises a valve body, an upper valve cover is installed on the upper side of the valve body, a sealing rod is in threaded connection with the interior of the upper valve cover, the top end of the sealing rod is in threaded connection with a limiting cover, and a plurality of lifting grooves are formed in the outer side surface of the sealing rod. A limiting mechanism is arranged on the outer side of the upper valve deck, and a control mechanism is slidably connected to the outer side of the sealing rod. When a control mechanism is used for controlling a sealing rod to control a sealing structure of the valve to move downwards to close the valve, an inserting rod can be placed in a limiting ring, and the situation that the control mechanism rotates reversely under the action of external force vibration or impact, and the sealing performance of the valve is affected is prevented through the limiting ring; the whole control mechanism can be directly moved upwards, so that the inserting rod is separated from the limiting ring, and the sealing rod can be rapidly controlled to rotate through the control mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a high-pressure resistant gate valve sealing structure. Background Art

[0002] The gate valve is a gate plate of an opening and closing part, of which the high-pressure gate valve is a type of gate valve. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as cladding 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve. Most gate valves are made of alloy steel and have good high-pressure resistance. The gate valve isolates the water resources at both ends of the valve through its sealing structure, and the sealing structure keeps the interior sealed to ensure that there will be no leakage or seepage.

[0003] The utility model patent with the authorization announcement number CN219639625U discloses a high-pressure resistant gate valve structure, which includes a gate valve body and a connecting pipe, wherein a valve stem is arranged on the gate valve body; a fixing plate is fixedly arranged on the gate valve body, and a clamp is arranged on the outer fixing sleeve of the valve stem, and a threaded shaft is rotatably arranged on the clamp. The utility model has a reasonable structural design, which can facilitate the positioning of the valve stem, avoid the valve stem rotating under the action of external force and affect the normal use of the gate valve body, and can facilitate the docking and fixing between the gate valve body and the connecting pipe, and the docking operation is convenient and quick.

[0004] Although the above utility model can prevent the valve stem from rotating under the action of external force, the utility model has a complex structure. When an emergency situation occurs and the sealing structure of the valve body needs to be quickly opened or closed, it needs to be unfastened and fixed according to the steps, which is troublesome to operate. In view of this, we propose a high-pressure resistant gate valve sealing structure. Utility Model Content

[0005] The utility model provides a high-pressure resistant gate valve sealing structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-pressure gate valve sealing structure, comprising a valve body, an upper valve cover is installed on the upper side of the valve body, a sealing rod is threadedly connected inside the upper valve cover, a limit cover is threadedly connected to the top of the sealing rod, and a plurality of lifting grooves are opened on the outer surface of the sealing rod;

[0008] A limiting mechanism is arranged on the outer side of the upper valve cover, and a control mechanism is slidably connected on the outer side of the sealing rod.

[0009] As a preferred technical solution, the limiting mechanism includes a support sleeve, a support baffle welded to the top of the support sleeve, and two symmetrically placed sliding grooves welded to the upper and lower ends of the right side surface of the support sleeve, a sliding plate is slidably connected in the sliding groove, a limiting ring is welded in the middle position of the front surface of the sliding plate, and limiting grooves are provided on the surface of the sliding plate on the left and right sides of the limiting ring, and a limiting bolt is threadedly connected in one of the limiting grooves.

[0010] As a preferred technical solution, the control mechanism includes a connecting ring, a plurality of control blocks welded to the inner surface of the connecting ring, and a plurality of connecting rods welded to the outer surface of the connecting ring, a control handle is welded to the outer end of the connecting rod, and an insertion rod is welded to the lower side of one of the connecting rods.

[0011] As a preferred technical solution, there are four lifting grooves distributed in a circular shape. The lifting groove is divided into two sections, the upper section and the lower section are located on different straight lines, and a connecting groove is opened between the two sections.

[0012] As a preferred technical solution, the limit cover is a regular hexagon in a top view, and the outer surface of the limit cover is provided with anti-slip grooves.

[0013] As a preferred technical solution, the limiting bolt uses a hexagonal bolt, and the inner surface of the limiting ring is in close contact with the outer surface of the insertion rod.

[0014] As a preferred technical solution, the control block is slidably connected to the inside of the lifting slot, and a through slot for the sealing rod to pass through is provided on the upper surface of the support baffle.

[0015] As a preferred technical solution, an angle of 30° is set between the connecting rod and the horizontal ground, and anti-slip grooves are provided on the outer surface of the control handle.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. When the control mechanism is used to manipulate the sealing rod to control the valve's sealing structure to move downward to close the valve, the plug rod can be placed in the limit ring. The limit ring prevents the control mechanism from rotating in the opposite direction under the action of external vibration or impact, which would affect the valve's sealing performance.

[0018] 2. When the valve needs to be quickly closed or opened, the control mechanism can be directly moved upward as a whole to disengage the plunger from the limit ring, and the sealing rod can be quickly controlled to rotate through the control mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2It is a structural schematic diagram of the valve body in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the limiting mechanism in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the control mechanism in the utility model.

[0023] The meaning of each number in the figure is:

[0024] 1. Valve body; 11. Upper valve cover; 12. Sealing rod; 13. Lifting groove; 14. Limiting cover; 2. Limiting mechanism; 21. Support sleeve; 22. Support baffle; 23. Sliding groove; 24. Sliding plate; 25. Limiting groove; 26. Limiting ring; 27. Limiting bolt; 3. Control mechanism; 31. Connecting ring; 32. Control block; 33. Connecting rod; 34. Control handle; 35. Insert rod. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-Figure 4 , this embodiment provides a technical solution:

[0027] A high-pressure resistant gate valve sealing structure comprises a valve body 1, an upper valve cover 11 is installed on the upper side of the valve body 1, a sealing rod 12 is threadedly connected to the inner part of the upper valve cover 11, a limiting cover 14 is threadedly connected to the top of the sealing rod 12, a plurality of lifting grooves 13 are provided on the outer surface of the sealing rod 12, a limiting mechanism 2 is arranged on the outer side of the upper valve cover 11, a control mechanism 3 is slidably connected to the outer side of the sealing rod 12, and through the above mechanism, when the valve needs to be used, the sealing rod 12 can be quickly controlled to rotate by pulling out the control mechanism 3 upwards.

[0028] It should be added that a thread for threaded connection of the limit bolt 27 is provided inside the limit groove 25, and the sealing structure refers to the valve stem including the sealing rod 12 and the gate plate, which is suitable for controlling the opening and closing of the gate valve.

[0029] Furthermore, the limiting mechanism 2 includes a support sleeve 21, a support baffle 22 welded to the top of the inner part of the support sleeve 21, and two symmetrically placed sliding grooves 23 welded to the upper and lower ends of the right side surface of the support sleeve 21. A sliding plate 24 is slidably connected in the sliding groove 23. A limiting ring 26 is welded at the middle position of the front surface of the sliding plate 24. Limiting grooves 25 are provided on the surface of the sliding plate 24 on the left and right sides of the limiting ring 26. A limiting bolt 27 is threadedly connected to one of the limiting grooves 25. A single limiting bolt 27 can be freely selected to be placed in the limiting groove on the left or right side.

[0030] Furthermore, the control mechanism 3 includes a connecting ring 31, a plurality of control blocks 32 welded to the inner surface of the connecting ring 31, and a plurality of connecting rods 33 welded to the outer surface of the connecting ring 31. A control handle 34 is welded to the outer end of the connecting rod 33, and an insertion rod 35 is welded to the lower side of one of the connecting rods 33. By extending the insertion rod 35 into the limit ring 26, the control mechanism 3 is limited from moving under the action of external force.

[0031] In this embodiment, there are four lifting grooves 13 distributed in a circular shape. The lifting grooves 13 are divided into two sections, the upper section and the lower section are located on different straight lines, and a connecting groove is opened between the two sections. The lifting grooves 13 are separated by the connecting grooves, and the control mechanism 3 can apply force here to control the rotation of the sealing rod 12.

[0032] In this embodiment, the limiting cover 14 is a regular hexagon in a top view, and an anti-slip pattern is provided on the outer surface of the limiting cover 14 to facilitate removal of the limiting cover 14 .

[0033] In this embodiment, the limiting bolt 27 uses a hexagonal bolt, and the inner surface of the limiting ring 26 is in close contact with the outer surface of the insertion rod 35. The limiting ring 26 can limit the insertion rod 35 to prevent the control mechanism 3 from rotating under the action of external force.

[0034] In this embodiment, the control block 32 is slidably connected to the inside of the lifting groove 13, and a through groove for the sealing rod 12 to pass through is opened on the upper surface of the support baffle 22 to ensure that the limiting mechanism 2 can be smoothly placed on the upper side of the upper valve cover 11.

[0035] In this embodiment, an angle of 30° is formed between the connecting rod 33 and the horizontal ground, and anti-slip grooves are formed on the outer surface of the control handle 34 .

[0036] It is worth mentioning that the structures and working principles of the valve body 1, the upper valve cover 11 and the sealing structure involved in this embodiment are well known to those skilled in the art and will not be elaborated herein.

[0037] During the specific use of the high-pressure gate valve sealing structure of this embodiment, first, according to the position of the plug rod 35 in the control mechanism 3 when the sealing structure in the valve body 1 is closed, the control mechanism 3 is then removed through the lifting groove 13, and the limiting mechanism 2 is placed from the upper side of the upper valve cover 11 according to the direction of the plug rod 35, ensuring that the limiting ring 26 and the plug rod 35 are on the same side, and then the control mechanism 3 is placed back on the lifting groove 13, and the plug rod 35 is inserted into the limiting ring 26, and then the sliding plate 24 is pushed to the position in the sliding groove 23 to ensure that the plug rod 35 will not rotate again, and then the limiting bolt 27 is tightened. At this time, the cooperation between the limiting ring 26 and the plug rod 35 can prevent the control mechanism 3 from rotating under the action of external force;

[0038] When the sealing structure needs to be quickly controlled, the control mechanism 3 can be directly lifted upwards so that after the insertion rod 35 is pulled out of the limit ring 26, the sealing rod 12 can be rotated by the control mechanism 3 so that the sealing structure can be smoothly controlled.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-pressure resistant gate valve sealing structure, comprising a valve body (1), characterized in that: An upper valve cover (11) is installed on the upper side of the valve body (1), a sealing rod (12) is threadedly connected to the inside of the upper valve cover (11), a top end of the sealing rod (12) is threadedly connected to a limit cover (14), and a plurality of lifting grooves (13) are formed on the outer surface of the sealing rod (12); A limiting mechanism (2) is disposed on the outer side of the upper valve cover (11), and a control mechanism (3) is slidably connected to the outer side of the sealing rod (12); The limiting mechanism (2) comprises a support sleeve (21), a support baffle (22) welded to the top of the support sleeve (21), and two symmetrically placed sliding grooves (23) welded to the upper and lower ends of the right side surface of the support sleeve (21); a sliding plate (24) is slidably connected in the sliding groove (23); a limiting ring (26) is welded to the middle position of the front side surface of the sliding plate (24); limiting grooves (25) are provided on the surface of the sliding plate (24) on the left and right sides of the limiting ring (26); a limiting bolt (27) is connected to one of the limiting grooves (25) through a thread; The control mechanism (3) comprises a connecting ring (31), a plurality of control blocks (32) welded to the inner surface of the connecting ring (31), and a plurality of connecting rods (33) welded to the outer surface of the connecting ring (31), a control handle (34) being welded to the outer end of the connecting rod (33), and an insertion rod (35) being welded to the lower side of one of the connecting rods (33).

2. The high pressure resistant gate valve sealing structure according to claim 1, characterized in that: There are four lifting grooves (13) in total, which are distributed in a circular shape. The lifting groove (13) is divided into two sections, the upper section and the lower section are located on different straight lines, and a connecting groove is provided between the two sections.

3. The high pressure resistant gate valve sealing structure according to claim 1, characterized in that: The limiting cover (14) is a regular hexagon in a top view, and an anti-slip pattern is provided on the outer surface of the limiting cover (14).

4. The high pressure resistant gate valve sealing structure according to claim 1, characterized in that: The limiting bolt (27) is a hexagonal bolt, and the inner surface of the limiting ring (26) is in close contact with the outer surface of the insertion rod (35).

5. The high pressure resistant gate valve sealing structure according to claim 1, characterized in that: The control block (32) is slidably connected to the inside of the lifting groove (13), and a through groove for the sealing rod (12) to pass through is formed on the upper surface of the supporting baffle (22).

6. The high pressure resistant gate valve sealing structure according to claim 1, characterized in that: An angle of 30° is formed between the connecting rod (33) and the horizontal ground, and an anti-slip pattern is formed on the outer surface of the control handle (34).

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