High-temperature-resistant and high-pressure-resistant sealing stop valve

Abstract

The utility model discloses a high-temperature-resistant and high-pressure-resistant sealing stop valve, and relates to the technical field of valves. The check valve comprises a valve body, a valve cover is arranged above the middle of the valve body, a valve rod is arranged in the valve cover, and the top end of the valve rod is connected with a hand wheel. A stop plate is arranged in the valve body, a valve clack assembly is arranged at the bottom of the valve rod and comprises a valve clack body rotationally connected with the valve rod, positioning rods are arranged at the four corners of the valve clack body, a sealing assembly is arranged at the upper end of the valve deck and comprises a sealing ring fixed in the upper side wall of the valve deck, and the upper side wall of the sealing ring is in threaded connection with a ring cover. A pressurizing ring is bonded to the inner wall of the sealing ring, and an inner cavity of the sealing ring communicates with the pressurizing ring. According to the utility model, the tightness of connection between the valve cover and the valve rod can be increased through the sealing assembly, the sealing performance between the valve cover and the valve rod is improved, and the valve clack assembly not only ensures that the valve clack body does not move when the valve rod rotates, but also ensures the stability when the valve clack body closes a medium channel.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to a high-temperature and high-pressure resistant sealing stop valve. Background Technology

[0002] A gate valve is a type of forced-sealing valve. Closing a gate valve requires external force. The valve stem is rotated by manually turning the handwheel, which in turn moves the valve disc up and down within the valve body, thus closing the fluid passage within the valve body. A gate valve consists of four main parts: the valve body, the valve stem, the valve disc, and the handwheel. The valve stem is inserted into the valve body, with one end inside the valve body connected to the valve disc and the other end outside the valve body connected to the handwheel. Turning the handwheel rotates the valve stem, causing the valve disc to move within the fluid passage of the valve body.

[0003] A Chinese patent application (or patent) with publication number CN214579249U discloses a high-temperature and high-pressure resistant gate valve, including a valve body, valve cover, valve stem, handwheel, and valve disc; it also includes a sealing ring and a sealing bushing. The sealing bushing is fitted around the outer periphery of the valve stem, and the bottom of the sealing bushing has a conical support portion, the upper end of which has a sealing inclined surface. A limiting step is provided on the inner wall of the valve body, abutting against the inner end of the conical support portion. The sealing ring is located around the outer periphery of the sealing bushing, and its cross-section is an isosceles trapezoidal shape, narrower on the inside and wider on the outside. The lower end face of the sealing ring is tightly fitted with the sealing inclined surface. The valve cover is threaded onto the valve body and fitted around the sealing bushing. The lower end of the valve cover has a conical extrusion flange, and the lower end of the conical extrusion flange has an extrusion inclined surface, which is tightly fitted with the upper end face of the sealing ring. This utility model features high temperature and high pressure resistance, enabling the valve to maintain good sealing performance under high temperature and high pressure, ensuring production safety.

[0004] The aforementioned high-temperature and high-pressure gate valve has a butt joint at the end of its valve stem. A butt interface is provided on the outer wall of the butt joint, which is rotatably connected to the valve disc via the butt interface. The valve disc is engaged in the flow port between two channels. The sealing performance between the valve stem and the flow port is improved by adding a sealing ring and a sealing bushing at the upper end of the flow port. However, during the opening of the gate valve, the medium continuously enters the flow port and exerts a significant impact force on the valve disc, resulting in excessive pressure on the valve disc and its upper valve stem. This impact can easily create a gap between the valve disc and the valve body. Furthermore, the valve cover has a packing pressure plate and a packing sleeve at the position for sliding insertion of the valve stem. These press the packing into the packing cavity to ensure a seal between the valve stem and the sealing bushing. However, there is a contact gap between the packing materials. Compacting with the pressure plate and sleeve can only reduce the gap, not eliminate it, thus still causing sealing problems. To address these issues, we provide a high-temperature and high-pressure resistant sealing shut-off valve. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature and high-pressure resistant sealing gate valve. The sealing component can increase the tightness of the connection between the valve cover and the valve stem and improve the sealing performance between them. The valve disc assembly not only ensures that the valve disc body does not move when the valve stem rotates, but also ensures the stability of the valve disc body when closing the medium channel. This solves the problems of the aforementioned high-temperature and high-pressure resistant gate valve.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a high-temperature and high-pressure resistant sealing stop valve, comprising a valve body, a valve cover located at the upper middle part of the valve body, and a valve stem located inside the valve cover, with a handwheel connected to the top of the valve stem; a stop plate located inside the valve body, a valve disc assembly located at the bottom of the valve stem, and the valve disc assembly including a valve disc body rotatably connected to the valve stem, with positioning rods located at the four corners of the valve disc body, the upper ends of the positioning rods inserted into circular holes on the inner wall of the valve body; a sealing assembly located at the upper end of the valve cover, the sealing assembly including a sealing ring fixed in the upper side wall of the valve cover, a ring cap threaded to the upper side wall of the sealing ring, and a pressure-increasing ring adhered to the inner wall of the sealing ring, the internal chamber of the sealing ring communicating with the pressure-increasing ring.

[0008] The present invention is further configured such that the valve body has a medium channel inside, and a stop plate is provided at the center of the medium channel, and a through-and-off groove is provided in the side wall of the horizontal section of the stop plate.

[0009] The present invention is further configured such that a top groove is provided in the upper side wall of the medium channel corresponding to the on / off groove, and a round hole is provided at each of the four corners of the top groove, and the inner wall of the top groove is engaged with the outer wall of the valve disc body.

[0010] The present invention is further configured such that a mating plate is integrally provided on the bottom side wall of the valve disc body, and the mating plate is mated with the on / off groove; a rotating groove is provided at the top of the valve disc body, and an anti-detachment ring is fixedly provided in the rotating groove.

[0011] The present invention is further configured such that the inner diameter of the anti-detachment ring is smaller than the inner diameter of the rotating groove, a rotating block is fixedly provided on the bottom side wall of the valve stem, and the rotating block is rotatably connected to the rotating groove, and a gap is provided between the outer wall of the valve stem and the anti-detachment ring.

[0012] The present invention is further configured such that hollow columns are integrally provided at the four corners of the valve disc body, and positioning rods are fixedly provided inside the hollow columns. A spring is sleeved on the outer wall of the positioning rod, one end of the spring is connected to the valve disc body, and the other end is connected to the top groove.

[0013] The present invention is further configured such that a threaded groove is provided at the top of the valve cover, a threaded ring is welded on the bottom side wall of the sealing ring and the threaded ring is threadedly connected to the threaded groove, a filling groove is provided inside the sealing ring, and a cover plate groove is provided at the top of the sealing ring.

[0014] The present invention is further configured such that the ring cover is threadedly connected to the cover plate groove, an overflow hole is provided at the position where the pressure ring is bonded on the sealing ring, and an inner groove is provided inside the pressure ring, and the filling groove inside the sealing ring is connected to the inner groove inside the pressure ring through the overflow hole.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model features a sealing assembly, which includes a sealing ring fixed to the top of the valve cover. The sealing ring has a filling groove inside for filling with a filler material. A pressure-increasing ring made of rubber material is bonded to the inner wall of the sealing ring. The pressure-increasing ring has an inner groove inside. An overflow hole is provided on the side wall of the sealing ring where the pressure-increasing ring is bonded, connecting the inner groove to the filling groove through the overflow hole. A cover groove is provided at the top of the filling groove, and the cover groove is threadedly connected to a ring cover. In use, a relatively hard micro-particle filler material is added to the filling groove until the filler material slightly overflows. After exiting the filling groove, the process stops. At this point, the filler material not only enters the filling groove but also flows into the inner groove of the pressure ring through the overflow hole. Then, the ring cover is rotated and installed. As the ring cover continues to rotate, it exerts pressure on the filler material in the filling groove below. Since the pressure ring is made of deformable rubber material, the pressure from the downward movement of the ring cover causes the filler material to be continuously pressed down and enter the rubber pressure ring through the overflow hole, thereby reducing the inner diameter of the pressure ring. As the inner diameter decreases, the contact space between the pressure ring and the valve stem becomes smaller, resulting in a tighter connection.

[0017] 2. This utility model incorporates a valve disc assembly, which includes a valve disc body. Hollow columns are located at each of the four corners of the valve disc body, with the tops of the hollow columns slidably inserted into circular holes on the top sidewall of the medium channel of the valve body. A spring is also provided between the top sidewall of the medium channel and the valve disc body, and the spring is sleeved on a positioning rod. In use, when the handwheel is held and rotated, the valve stem rotates accordingly, and the valve disc body, located at the bottom of the valve stem and rotatably connected to it, moves up and down. During this up-and-down movement, due to the presence of the positioning rod, and the fact that the top of the positioning rod contacts the circular hole of the medium channel, the valve disc body only moves up and down and does not rotate with the valve stem, ensuring that the position of the valve disc body does not change. Furthermore, when the valve disc body is closed on the stop plate, due to the presence of the spring on the positioning rod, one end abuts against the inner wall of the medium channel, and the other end abuts against the valve disc body, thereby improving the stability of the contact between the valve disc body and the stop plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a high-temperature and high-pressure resistant sealing gate valve.

[0020] Figure 2 This is a structural cross-sectional view of a high-temperature and high-pressure resistant sealed shut-off valve.

[0021] Figure 3 This is a half-sectional view of the structure of a high-temperature and high-pressure resistant sealing gate valve.

[0022] Figure 4 This is a partial cross-sectional view of the valve body.

[0023] Figure 5 This is a structural disassembly diagram of the sealing assembly.

[0024] Figure 6 This is a structural disassembly diagram of the valve disc assembly.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1-Valve body, 101-Medium passage, 102-Stop plate, 102a-On / off groove, 102b-Top groove, 102c-Round hole, 2-Valve cover, 201-Threaded groove, 3-Valve stem, 301-Rotating block, 4-Handwheel, 5-Sealing assembly, 501-Sealing ring, 501a-Threaded ring, 501b-Filling groove, 501c-Overflow hole, 501d-Cover plate groove, 502-Pressure ring, 502a-Inner groove of ring, 503-Ring cover, 6-Valve disc assembly, 601-Valve disc body, 601a-Matching plate, 601b-Rotating groove, 601c-Hollow column, 602-Positioning rod, 602a-Spring, 603-Anti-detachment ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1, please refer to Figure 1-5 This utility model is a high temperature and high pressure resistant sealing stop valve, including valve body 1, valve stem 3, valve cover 2, handwheel 4 and sealing assembly 5. The sealing assembly 5 can increase the tightness of the connection between valve cover 2 and valve stem 3 and improve the sealing performance between them.

[0029] Specifically, a valve cover 2 is provided at the upper middle part of the valve body 1. A valve stem 3 is internally threaded to the valve cover 2, and a handwheel 4 is installed on the top of the valve stem 3. A sealing assembly 5 is also provided between the top of the valve cover 2 and the valve stem 3. The sealing assembly 5 includes a sealing ring 501 fixed on the valve cover 2. A ring cover 503 is provided on the upper end of the sealing ring 501, and a pressure ring 502 is adhered to the inner wall of the sealing ring 501.

[0030] Furthermore, the top of the valve cover 2 is provided with a threaded groove 201, and a threaded ring 501a is welded to the bottom side wall of the sealing ring 501. The threaded ring 501a is threadedly connected to the threaded groove 201. The interior of the sealing ring 501 is provided with a filling groove 501b for filling with filler. A pressure ring 502 made of rubber material is bonded to the inner side wall of the sealing ring 501. The interior of the pressure ring 502 is provided with an inner groove 502a. An overflow hole 501c is provided on the side wall of the sealing ring 501 where the pressure ring 502 is bonded. The inner groove 502a and the filling groove 501b are connected through the overflow hole 501c. The top of the filling groove 501b is provided with a cover plate groove 501d, which is threadedly connected to the ring cover 503.

[0031] The operation process of this embodiment is as follows: When in use, add hard micro-particle filler to the filling groove 501b until the filler slightly overflows the filling groove 501b and then stop. At this time, the filler not only enters the filling groove 501b, but also enters the inner groove 502a of the pressure ring 502 through the overflow hole 501c. Then, the ring cover 503 is rotated and connected. As the ring cover 503 continues to rotate, the ring cover 503 exerts pressure on the filler in the filling groove 501b below it. Since the pressure ring 502 is made of deformable rubber material, the pressure brought by the downward movement of the ring cover 503 will cause the filler to be continuously pressed down and enter the rubber material pressure ring 502 through the overflow hole 501c, thereby reducing the inner diameter of the pressure ring 502. When the inner diameter is smaller, the contact space between the pressure ring 502 and the valve stem 3 is smaller.

[0032] Example 2, please refer to Figure 6 Based on embodiment 1, a valve disc assembly 6 is also provided. The valve disc assembly 6 not only ensures that the valve disc body 6 does not move when the valve stem 3 rotates, but also ensures the stability of the valve disc body 6 when closing the medium channel 101.

[0033] Specifically, the valve cover 2 of the valve body 1 is provided with a valve stem 3, the bottom of the valve stem 3 is rotatably connected to a valve disc assembly 6, the bottom of the valve stem 3 is fixedly provided with a rotating block 301, the valve disc assembly 6 includes a valve disc body 601, and the top of the valve disc body 601 is provided with a rotating groove 601b that is rotatably connected to the rotating block 301. An anti-disengagement ring 603 is fixedly provided in the rotating groove 601b. Positioning rods 602 are provided at the four corners of the valve disc body 601, and springs 602a are sleeved on the outer wall of the positioning rods 602. A mating plate 601a is provided on the bottom side wall of the valve disc body 601.

[0034] Furthermore, the valve body 1 has a medium channel 101 inside, and a stop plate 102 is provided in the middle of the medium channel 101. A switching groove 102a is opened on the horizontal section of the stop plate 102. The switching groove 102a cooperates with the mating plate 601a. ​​A top groove 102b is opened on the top side wall of the medium channel 101 corresponding to the switching groove 102a. A round hole 102c is opened at each of the four corners of the top of the top groove 102b. The top end of the positioning rod 602 is inserted into the round hole 102c. One end of the spring 602a abuts against the inner wall of the top groove 102b, and the other end is connected to the valve disc body 601. A hollow column 601c is provided at each of the four corners of the valve disc body 601, and the positioning rod 602 is fixed in the hollow column 601c.

[0035] The operation process of this embodiment is as follows: When in use, hold the handwheel 4 and rotate it. The valve stem 3 will rotate accordingly, and the valve disc body 601 located at the bottom of the valve stem 3 and rotatably connected to it will move up and down. When it moves up and down, due to the presence of the positioning rod 602 and the fact that the top of the positioning rod 602 is in contact with the round hole 102c of the medium channel 101, the valve disc body 601 will only move up and down and will not rotate with the rotation of the valve stem 3. At the same time, when the valve disc body 601 is closed on the stop plate 102, the stability of the contact between the valve disc body 601 and the stop plate 102 is ensured by the presence of the spring 602a on the positioning rod 602.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-temperature and high-pressure resistant sealing stop valve, comprising a valve body (1), a valve cover (2) provided above the middle of the valve body (1), and a valve stem (3) provided inside the valve cover (2), wherein a handwheel (4) is connected to the top of the valve stem (3); characterized in that: The inside of the valve body (1) is provided with a cutoff plate (102), the bottom of the valve rod (3) is provided with a valve clack assembly (6), and the valve clack assembly (6) comprises a valve clack body (601) rotationally connected with the valve rod (3), the valve clack body (601) is provided with a positioning rod (602) at each corner, and the upper end of the positioning rod (602) is inserted into a circular hole (102c) on the inner wall of the valve body (1), the upper end of the valve cover (2) is provided with a sealing assembly (5), the sealing assembly (5) comprises a sealing ring (501) fixed in the upper side wall of the valve cover (2), the upper side wall of the sealing ring (501) is threadedly connected with a ring cover (503), and the inner wall of the sealing ring (501) is bonded with a booster ring (502), and the inner cavity of the sealing ring (501) is communicated with the booster ring (502).

2. The high temperature and high pressure resistant sealing stop valve according to claim 1, characterized in that, The inside of the valve body (1) is provided with a medium channel (101), and the center of the medium channel (101) is provided with a cutoff plate (102), and the side wall of the horizontal section of the cutoff plate (102) is provided with an on-off groove (102a).

3. The high temperature and high pressure resistant sealing stop valve according to claim 2, characterized in that, The upper side wall of the medium channel (101) corresponding to the on-off groove (102a) is provided with a top groove (102b), and the four corners of the top groove (102b) are provided with a circular hole (102c), and the inner wall of the top groove (102b) is matched with the outer wall of the valve clack body (601).

4. The high temperature and high pressure resistant sealing stop valve according to claim 3, characterized in that, The bottom side wall of the valve clack body (601) is integrally provided with a matching plate (601a), and the matching plate (601a) is matched with the on-off groove (102a), and the top end of the valve clack body (601) is provided with a rotating groove (601b), and the rotating groove (601b) is fixedly provided with an anti-drop ring (603).

5. The high temperature and high pressure resistant sealing stop valve according to claim 4, characterized in that, The inner diameter of the anti-drop ring (603) is smaller than the inner diameter of the rotating groove (601b), the bottom side wall of the valve rod (3) is fixedly provided with a rotating block (301), and the rotating block (301) is rotationally connected with the rotating groove (601b), and the outer wall of the valve rod (3) is arranged in a gap with the anti-drop ring (603).

6. The high temperature and high pressure resistant sealing stop valve according to claim 1, characterized in that, The four corners of the valve clack body (601) are integrally provided with a hollow column (601c), and the hollow column (601c) is fixedly provided with a positioning rod (602), the outer wall of the positioning rod (602) is sleeved with a spring (602a), one end of the spring (602a) is connected with the valve clack body (601), and the other end is connected with the top groove (102b).

7. The high temperature and high pressure resistant sealing stop valve according to claim 1, characterized in that, The top end of the valve cover (2) is provided with a screw groove (201), the bottom side wall of the sealing ring (501) is welded with a threaded ring (501a), and the threaded ring (501a) is threadedly connected with the screw groove (201), the inside of the sealing ring (501) is provided with a filling groove (501b), and the top of the sealing ring (501) is provided with a cover groove (501d).

8. The high temperature and high pressure resistant sealing stop valve according to claim 7, characterized in that, The ring cover (503) is threadedly connected with the cover plate groove (501d), the sealing ring (501) is provided with an overflow hole (501c) at a position where the sealing ring (501) is bonded with the booster ring (502), and the booster ring (502) is internally provided with a ring inner groove (502a), and the filling groove (501b) in the sealing ring (501) is in communication with the ring inner groove (502a) in the booster ring (502) through the overflow hole (501c).

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