High-pressure self-sealing gate valve

Abstract

The utility model discloses a high-pressure self-sealing gate valve which comprises a lower valve casing, and the top of the lower valve casing is provided with an upper valve casing through a screw. By installing the inner gate plate and the like, when the valve is used, a user can rotate the worm by holding the annular operating handle with a hand, and then the valve rod and the inner gate plate are driven to move based on the transmission effect of the worm and the worm gear, so that opening and closing control is achieved; compared with a common structure that the valve rod is directly operated to drive the inner flashboard to move, the structure can avoid the problem that the inner flashboard is loosened due to the fact that impact force of high-pressure media on the inner flashboard is large on the basis of the self-locking function of the worm and gear mechanism. The sealing ring is arranged at the edge of the flange plate, so that good self-locking and self-sealing protection of the device is achieved, the device is more suitable for circulation control treatment of a high-pressure medium with large impact energy, in addition, the sealing ring is arranged at the edge of the flange plate, the connecting end of the device achieves good sealing and anti-leakage effects, and self-sealing and anti-leakage protection of the device is further optimized.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure gate valve technology, specifically a high-pressure self-sealing gate valve. Background Technology

[0002] High-pressure gate valves are commonly used in petroleum, chemical, power, environmental protection, water conservancy and heating industries. As an opening and closing device, they are used to connect or cut off the flow of media in pipelines. The opening and closing components of this type of high-pressure gate valve are a gate and a valve stem. The opening and closing control of the flow of high-pressure media is achieved by operating the valve stem to drive the gate to move. However, there are still some defects in the actual use of high-pressure gate valves.

[0003] High-pressure gate valves require long-term control of the flow of high-pressure media. Considering the large impact force of high-pressure media on the valve body, and the fact that existing high-pressure gate valves do not have a buffer and energy-dissipating protection structure, the device is prone to valve body damage and gate loosening. Furthermore, the easy loosening of the gate leads to poor self-locking and self-sealing effect and easy leakage problems. Based on the above defects, we propose a new type of high-pressure self-sealing gate valve. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure self-sealing gate valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure self-sealing gate valve, comprising a lower valve shell, an upper valve shell mounted on the top of the lower valve shell by screws, an inlet and an outlet respectively provided on both sides of the lower valve shell, a buffer pressure reducing protective cylinder mounted on the inlet, a filter screen plate installed inside the buffer pressure reducing protective cylinder, a fixing seat mounted on the middle position of one side of the filter screen plate by screws, a second conical tooth provided on the fixing seat via a rotating shaft, fan blades evenly arranged on the outer side of the other end of the rotating shaft, a servo motor mounted on the outer side of the buffer pressure reducing protective cylinder at a position corresponding to the fixing seat, the output end of the servo motor extending into the interior of the buffer pressure reducing protective cylinder and connected to a drive shaft, a first conical tooth meshing with the second conical tooth provided at the top of the drive shaft;

[0006] An inner gate is installed between the upper valve housing and the lower valve housing. A housing is welded to the top of the upper valve housing. A worm gear and a worm wheel are sequentially connected inside the housing. A valve stem is fixed between the worm wheel and the inner gate. A ring-shaped operating handle is welded to one side of the worm gear. Flanges are welded to the buffer pressure reducing protective cylinder, the inlet, and the outlet. A sealing ring is provided at the edge of the flange.

[0007] Preferably, the filter screen and the buffer pressure reducing protective cylinder form a disassembly and installation structure, and the buffer pressure reducing protective cylinder is provided with a threaded assembly port that is threadedly connected to the filter screen.

[0008] Preferably, the inner walls of both the lower valve housing and the upper valve housing are provided with a nano-ceramic anti-stick coating.

[0009] Preferably, the fan blades are provided with 4 blades, which are arranged at equal angles.

[0010] Preferably, the upper valve housing is provided with a locking rope that matches the annular operating handle.

[0011] Preferably, energy-dissipating protrusions are fixed on both sides of the fan blade.

[0012] Preferably, the lower valve housing and the upper valve housing are connected by a snap-fit ​​connection, and screws are evenly distributed between the lower valve housing and the upper valve housing.

[0013] Preferably, the filter screen is made of aluminum alloy, and the outer wall of the filter screen is provided with a Teflon non-stick layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) The high-pressure self-sealing gate valve has optimized its structure by setting a flange, etc. The user can rotate the worm by holding the ring-shaped operating handle, and then drive the valve stem and inner gate to move based on the transmission action of the worm and worm wheel, so as to realize the opening and closing control. Compared with the common structure of directly operating the valve stem to drive the inner gate, this structure can avoid the problem of the inner gate loosening due to the large impact force of the high pressure medium on the inner gate. Thus, the device achieves better self-locking and self-sealing protection and is more suitable for the flow control of high pressure medium with large impact energy. In addition, by setting a sealing ring at the edge of the flange, the connection end of the device achieves a better sealing and anti-leakage effect, which further optimizes the self-sealing and anti-leakage protection of the device.

[0016] (2) The high-pressure self-sealing gate valve optimizes its performance by installing a buffer pressure reducing protection cylinder, etc. The incoming high-pressure medium will pass through the buffer pressure reducing protection cylinder before entering the lower valve body through the inlet. During this process, the servo motor drives the transmission shaft to rotate the first conical tooth, thereby driving the four fan blades at one end of the shaft to rotate through the second conical tooth, intercepting part of the impact energy of the high-pressure medium and realizing the energy consumption buffer treatment of the high-pressure medium. In addition, when the high-pressure medium enters the lower valve body through the filter holes of the filter screen, the impact energy of the high-pressure medium can be converted into frictional internal energy through friction, realizing the secondary energy consumption buffer treatment of the high-pressure medium. This filtration treatment also ensures that large particles of impurities in the medium will not enter the device and cause blockage. Thus, through buffer energy consumption protection treatment and filtration purification treatment, it is beneficial to extend the service life of the device and facilitate its promotion. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is a top view sectional structural diagram of the housing of this utility model;

[0020] Figure 4 This is a rear view structural diagram of the buffer pressure relief protective cylinder of this utility model;

[0021] Figure 5 This is a rear view schematic diagram of the fixed base of this utility model.

[0022] In the diagram: 1. Upper valve housing; 2. Lower valve housing; 3. Housing; 4. Annular operating handle; 5. Locking rope; 6. Inner gate; 7. Flange; 8. Valve stem; 9. Buffer pressure reducing protective cylinder; 10. Inlet; 11. Outlet; 12. Worm gear; 13. Worm; 14. Filter screen; 15. Threaded assembly port; 16. Fixed seat; 17. Fan blade; 18. Conical tooth two; 19. Energy dissipating ridge; 20. Sealing ring; 21. Servo motor; 22. Drive shaft; 23. Conical tooth one. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figure 1-5An embodiment of this utility model provides a high-pressure self-sealing gate valve, including a lower valve shell 2, an upper valve shell 1 mounted on the top of the lower valve shell 2 by screws, an inlet 10 and an outlet 11 respectively provided on both sides of the lower valve shell 2, a buffer pressure reducing protective cylinder 9 installed on the inlet 10, a filter screen plate 14 installed inside the buffer pressure reducing protective cylinder 9, a fixing seat 16 mounted on the middle position of one side of the filter screen plate 14 by screws, a conical tooth 18 provided on the fixing seat 16 by a rotating shaft, fan blades 17 evenly provided on the outer side of the other end of the rotating shaft, a servo motor 22 installed on the outer side of the buffer pressure reducing protective cylinder 9 at the position corresponding to the fixing seat 16, the output end of the servo motor 22 extends into the interior of the buffer pressure reducing protective cylinder 9 and is connected to a drive shaft 22, the top end of the drive shaft 22 is provided with a conical tooth 23 that meshes with the conical tooth 18;

[0025] During use, the incoming high-pressure medium will first pass through the buffer pressure reducing protection cylinder 9 and then enter the interior of the lower valve body 2 through the inlet 10. During this process, the servo motor 22 drives the transmission shaft 22 to rotate the conical gear 1 23, thereby driving the four fan blades 17 at one end of the rotating shaft to rotate through the conical gear 2 18, intercepting part of the impact energy of the high-pressure medium and realizing the energy consumption buffer treatment of the high-pressure medium. In addition, when the high-pressure medium enters the interior of the lower valve body 2 through the filter holes of the filter screen plate 14, the impact energy of the high-pressure medium can be converted into frictional internal energy through friction, realizing the secondary energy consumption buffer treatment of the high-pressure medium. This filtration treatment also ensures that large particulate impurities in the medium will not enter the interior of the device and cause blockage. Thus, through buffer energy consumption protection treatment and filtration purification treatment, it is beneficial to extend the service life of the device and facilitate its promotion.

[0026] An inner gate plate 6 is installed between the upper valve housing 1 and the lower valve housing 2. A housing 3 is welded to the top of the upper valve housing 1. A worm gear 13 and a worm wheel 12 are sequentially connected inside the housing 3. A valve stem 8 is fixed between the worm wheel 12 and the inner gate plate 6. A ring-shaped operating handle 4 is welded to one side of the worm gear 13. Flanges 7 are welded to the buffer pressure reducing protective cylinder 9, the inlet 10, and the outlet 11. A sealing ring 20 is provided at the edge of the flange 7.

[0027] In use, the user can rotate the worm gear 13 by holding the ring-shaped operating handle 4. Based on the transmission action of the worm gear 13 and the worm wheel 12, the valve stem 8 and the inner gate 6 are driven to move, realizing opening and closing control. Compared with the common structure that directly operates the valve stem 8 to drive the inner gate 6, this structure, based on the self-locking effect of the worm wheel and worm gear mechanism, can avoid the problem of the inner gate 6 becoming loose due to the large impact force of the high pressure medium. Thus, the device achieves better self-locking and self-sealing protection and is more suitable for the flow control of high pressure medium with large impact energy. In addition, by setting a sealing ring 20 at the edge of the flange 7, the connection end of the device achieves a better sealing and anti-leakage effect, which further optimizes the self-sealing and anti-leakage protection of the device.

[0028] The filter screen 14 and the buffer pressure reducing protection cylinder 9 form a disassembly and installation structure. The buffer pressure reducing protection cylinder 9 is provided with a threaded assembly port 15 that is threadedly connected to the filter screen 14.

[0029] The inner walls of both the lower valve housing 2 and the upper valve housing 1 are provided with a nano-ceramic anti-stick coating.

[0030] There are four fan blades 17, which are arranged at equal angles.

[0031] The upper valve housing 1 is equipped with a locking rope 5 that matches the annular operating handle 4;

[0032] When in use, the user can bind the locking rope 5 and the ring-shaped operating handle 4 to further improve the stability of the ring-shaped operating handle 4 and ensure that it is not easy to loosen.

[0033] Energy-dissipating protrusions 19 are fixed on both sides of the fan blade 17;

[0034] The lower valve housing 2 and the upper valve housing 1 are connected by a snap-fit ​​connection, and screws are evenly arranged between the lower valve housing 2 and the upper valve housing 1.

[0035] The filter screen 14 is made of aluminum alloy, and the outer wall of the filter screen 14 is provided with a Teflon non-stick layer.

[0036] In this embodiment, the user first uses a flange 7 with a sealing ring 20 and screws to install the buffer pressure reducing protective cylinder 9 on the inlet 10. The buffer pressure reducing protective cylinder 9 and the outlet 11 are then connected to the corresponding pipeline equipment via screws. In actual operation, the incoming high-pressure medium passes through the buffer pressure reducing protective cylinder 9 before entering the lower valve body 2 through the inlet 10. During this process, the servo motor 22 drives the transmission shaft 22 to rotate the conical gear 23, thereby driving the four fan blades 17 at one end of the rotating shaft to rotate via the conical gear 18. This intercepts a portion of the impact energy of the high-pressure medium, achieving energy buffering for the high-pressure medium. Furthermore, when the high-pressure medium enters the lower valve body 2 through the filter holes of the filter plate 14, friction converts a portion of the impact energy of the high-pressure medium into frictional internal energy, achieving energy buffering for the high-pressure medium. The secondary energy-consuming buffering treatment of the medium, and this filtration treatment also ensures that large particles of impurities in the medium will not enter the device and cause blockage. Thus, through buffering energy-consuming protection and filtration purification, it is beneficial to extend the service life of the device and facilitate its promotion. In addition, the user can rotate the worm gear 13 by holding the ring-shaped operating handle 4. Based on the transmission action of the worm gear 13 and the worm wheel 12, the valve stem 8 and the inner gate 6 are driven to move, realizing opening and closing control. Compared with the common structure of directly operating the valve stem 8 to drive the inner gate 6, this structure, based on the self-locking effect of the worm gear mechanism, can avoid the problem of the inner gate 6 loosening due to the large impact force of the high pressure medium. Thus, the device achieves better self-locking and self-sealing protection and is more suitable for the flow control of high pressure media with high impact energy. Furthermore, by setting a sealing ring 20 at the edge of the flange 7, the connection end of the device achieves a better sealing and anti-leakage effect, which further optimizes the self-sealing and anti-leakage protection of the device.

Claims

1. A high-pressure self-sealing gate valve, characterized in that, The device includes a lower valve housing (2), an upper valve housing (1) is mounted on the top of the lower valve housing (2) by screws, an inlet (10) and an outlet (11) are respectively provided on both sides of the lower valve housing (2), a buffer pressure reducing protective cylinder (9) is installed on the inlet (10), a filter screen plate (14) is installed inside the buffer pressure reducing protective cylinder (9), a fixing seat (16) is mounted on the middle position of one side of the filter screen plate (14) by screws, a conical tooth (18) is provided on the fixing seat (16) by a rotating shaft, and fan blades (17) are evenly arranged on the outer side of the other end of the rotating shaft. A servo motor (21) is installed on the outer side of the buffer pressure reducing protective cylinder (9) at the position corresponding to the fixing seat (16), the output end of the servo motor (21) extends into the interior of the buffer pressure reducing protective cylinder (9) and is connected to a drive shaft (22), and a conical tooth (23) is provided at the top of the drive shaft (22) to mesh with the conical tooth (18); An inner gate plate (6) is installed between the upper valve housing (1) and the lower valve housing (2). A box (3) is welded to the top of the upper valve housing (1). A worm gear (13) and a worm wheel (12) are sequentially connected inside the box (3). A valve stem (8) is fixed between the worm wheel (12) and the inner gate plate (6). A ring-shaped operating handle (4) is welded to one side of the worm gear (13). Flanges (7) are welded to the buffer pressure reducing protective cylinder (9), the inlet (10) and the outlet (11). A sealing ring (20) is provided at the edge of the flange (7).

2. The high-pressure self-sealing gate valve according to claim 1, characterized in that: The filter screen (14) and the buffer pressure reducing protection cylinder (9) form a disassembly and installation structure. The buffer pressure reducing protection cylinder (9) has a threaded assembly port (15) that is threadedly connected to the filter screen (14).

3. The high-pressure self-sealing gate valve according to claim 1, characterized in that: The inner walls of both the lower valve housing (2) and the upper valve housing (1) are provided with a nano-ceramic anti-stick coating.

4. A high-pressure self-sealing gate valve according to claim 1, characterized in that: The fan blades (17) are provided in four parts, and the fan blades (17) are arranged at equal angles.

5. A high-pressure self-sealing gate valve according to claim 1, characterized in that: The upper valve housing (1) is provided with a locking rope (5) that matches the annular operating handle (4).

6. A high-pressure self-sealing gate valve according to claim 1, characterized in that: Both sides of the fan blade (17) are fixed with energy-dissipating protrusions (19).

7. A high-pressure self-sealing gate valve according to claim 1, characterized in that: The lower valve housing (2) and the upper valve housing (1) are connected by a snap-fit ​​mechanism, and screws are evenly arranged between the lower valve housing (2) and the upper valve housing (1).

8. A high-pressure self-sealing gate valve according to claim 1, characterized in that: The filter screen (14) is made of aluminum alloy, and the outer wall of the filter screen (14) is provided with a Teflon non-stick layer.

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