High-pressure-difference double-seal stop valve with detachable movable pair valve clack

Abstract

The utility model discloses a high-pressure-difference double-sealing stop valve with a detachable movable pair valve clack, and relates to the field of stop valves. The high-pressure-difference double-sealing stop valve with the detachable movable pair valve clack comprises a valve body, a cavity is formed in the valve body, transmission channels communicated with the cavity are formed in the two ends of the valve body, a valve seat and a sleeve are fixedly installed on the inner wall of the cavity, and a through window is formed in the top end of the sleeve. A main valve clack is arranged on the inner wall of the sleeve in a sliding mode, an auxiliary valve clack is installed at the bottom end of the main valve clack, and a valve rod is fixedly installed at the top of the main valve clack. According to the high-pressure-difference double-seal stop valve with the detachable movable auxiliary valve clack, when the main valve clack and the auxiliary valve clack move downwards, the bottom end of the main valve clack and the outer ring of the auxiliary valve clack tightly abut against the inner wall of the valve seat, the main valve clack and the auxiliary valve clack have the sealing effect on the valve seat at the same time, and even if the auxiliary valve clack is damaged in the high-pressure-difference environment, the valve seat can not be damaged. And the main valve clack can still be sealed.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve. Background Art

[0002] Globe valves, also known as gate valves, are one of the most widely used valves. Their opening and closing member is a plug-shaped disc with a flat or conical sealing surface. The disc moves linearly along the centerline of the valve seat. Their operating principle is to rely on the pressure of the valve stem to force the disc sealing surface to tightly fit the valve seat sealing surface, preventing the flow of media.

[0003] However, in high-pressure fluid transmission systems such as steam pipelines and oil pipelines, high-pressure transportation is required, which results in a high pressure difference between the inside of the pipeline and the inside of the valve during the transportation process and the stage of stopping transportation, which can easily damage the valve flap. When the valve flap is damaged, a gap will appear between it and the valve seat. Under high pressure, the gap will expand rapidly, causing the valve to fail and possible safety accidents. Therefore, this application proposes a high-pressure difference detachable movable auxiliary valve flap double-sealed stop valve. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve, which solves the problem that in high-pressure fluid transmission systems such as steam pipelines and oil pipelines, high-pressure transportation is required, resulting in a high pressure difference between the inside of the pipeline and the inside of the valve during the transportation process and the stage of stopping transportation, which can easily damage the valve disc. When the valve disc is damaged, a gap will appear between it and the valve seat. Under high pressure conditions, the gap will rapidly expand, causing the valve to fail and possible safety accidents.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve, comprising a valve body, a cavity is defined in the interior of the valve body, and transmission channels communicating with the cavity are defined at both ends of the valve body, a valve seat and a sleeve are fixedly mounted on the inner wall of the cavity, the sleeve is mounted above the valve seat, and a through window is defined at the top of the sleeve, a main valve disc is slidably mounted on the inner wall of the sleeve, an auxiliary valve disc is mounted at the bottom end of the main valve disc, and the bottom end of the main valve disc and the outer ring of the auxiliary valve disc are tightly abutted against the inner wall of the valve seat, and a valve stem is fixedly mounted on the top of the main valve disc;

[0006] The top end of the valve stem extends upward and is connected to a sealing unit and an electric drive unit.

[0007] Preferably, the bottom end of the main valve flap is fixedly connected to the auxiliary valve flap by bolts.

[0008] Preferably, the sealing unit includes:

[0009] A packing chamber, which is installed inside the valve body and movably sleeved on the outside of the valve stem;

[0010] A support sleeve, which is installed on the top of the packing chamber and movably sleeved on the outer side of the valve stem;

[0011] The packing gland is movably sleeved on the outside of the valve stem, and the bottom of the packing gland is tightly against the support sleeve. The packing gland is fixedly connected to the top of the valve body by bolts.

[0012] Preferably, a corrugated packing is provided between the top inner wall of the packing chamber and the outer side of the valve stem.

[0013] Preferably, the electric drive unit includes:

[0014] A mounting bracket, wherein the mounting bracket is fixedly connected to the top of the valve body by bolts, and a connecting sleeve is fixedly installed on the top of the mounting bracket;

[0015] An electric actuator is fixedly mounted on the top of the connecting sleeve, and an output end of the electric actuator is transmission-connected with a copper nut, which is rotatably connected to the inner wall and threadedly connected to the top of the valve stem.

[0016] Preferably, an anti-rotation disc is fixedly connected to the outer side of the mounting bracket, and the anti-rotation disc is movably sleeved on the outer side of the valve stem. A positioning bolt is provided inside the anti-rotation disc for rotation, and the end of the positioning bolt contacts the outer side of the valve stem.

[0017] The utility model discloses a high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve, which has the following beneficial effects: during use of the high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve, the auxiliary valve disc is installed at the bottom end of the main valve disc, so that the main valve disc and the auxiliary valve disc can move in the sleeve at the same time, and when the main valve disc and the auxiliary valve disc move upward under the action of the valve stem, the transmission channels on both sides can be connected through the window at the bottom end of the sleeve, thereby realizing the passage, and when the main valve disc and the auxiliary valve disc move downward, the bottom end of the main valve disc and the outer ring of the auxiliary valve disc are tightly abutted against the inner wall of the valve seat, so that the main valve disc and the auxiliary valve disc have a sealing effect on the valve seat at the same time, even if the auxiliary valve disc is damaged in a high-pressure differential environment, the main valve disc can still be sealed, and the auxiliary valve disc can be directly replaced during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0020] Figure 2 For this utility model Figure 1 A magnified schematic diagram of part A in FIG.

[0021] In the figure: 1. Valve body; 11. Cavity; 12. Transmission channel; 13. Valve seat; 14. Sleeve; 15. Window; 16. Main valve disc; 17. Auxiliary valve disc; 18. Valve stem; 2. Sealing unit; 21. Packing chamber; 22. Support sleeve; 23. Packing gland; 24. Corrugated packing; 3. Electric drive unit; 31. Mounting bracket; 32. Connecting sleeve; 33. Electric actuator; 34. Copper nut; 35. Anti-rotation disc. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] The embodiment of the utility model discloses a high-pressure differential double-sealed stop valve with a detachable movable auxiliary valve disc.

[0024] According to the attached Figure 1-2 As shown, it includes a valve body 1, a cavity 11 is formed inside the valve body 1, and transmission channels 12 connected to the cavity 11 are formed at both ends of the valve body 1, a valve seat 13 and a sleeve 14 are fixedly mounted on the inner wall of the cavity 11, the sleeve 14 is mounted above the valve seat 13, and a through window 15 is formed at the top of the sleeve 14, a main valve disc 16 is slidably mounted on the inner wall of the sleeve 14, an auxiliary valve disc 17 is mounted at the bottom end of the main valve disc 16, and the bottom end of the main valve disc 16 and the outer ring of the auxiliary valve disc 17 are tightly abutted against the inner wall of the valve seat 13, and a valve stem 18 is fixedly mounted on the top of the main valve disc 16;

[0025] The top end of the valve stem 18 extends upward and is connected to the sealing unit 2 and the electric drive unit 3 .

[0026] During use, the auxiliary valve flap 17 is installed at the bottom end of the main valve flap 16, and the main valve flap 16 and the auxiliary valve flap 17 can move in the sleeve 14 at the same time. When the main valve flap 16 and the auxiliary valve flap 17 move upward under the action of the valve stem 18, the transmission channels 12 on both sides can be connected through the window 15 at the bottom end of the sleeve 14, thereby realizing the passage. When the main valve flap 16 and the auxiliary valve flap 17 move downward, the bottom end of the main valve flap 16 and the outer ring of the auxiliary valve flap 17 are tightly against the inner wall of the valve seat 13, and the main valve flap 16 and the auxiliary valve flap 17 simultaneously have a sealing effect on the valve seat 13. Even if the auxiliary valve flap 17 is damaged in a high pressure difference environment, the main valve flap 16 can still be sealed. During maintenance, the auxiliary valve flap 17 can be directly replaced.

[0027] Furthermore, the bottom end of the main valve flap 16 is fixedly connected to the auxiliary valve flap 17 by bolts, thereby facilitating the disassembly and replacement of the main valve flap 16 and the auxiliary valve flap 17 .

[0028] Specifically disclosed, the sealing unit 2 comprises:

[0029] The packing chamber 21 is installed inside the valve body 1 and is movably sleeved on the outside of the valve stem 18;

[0030] The support sleeve 22 is installed on the top of the packing chamber 21, and the support sleeve 22 is movably connected to the outer side of the valve stem 18;

[0031] The packing gland 23 is movably sleeved on the outside of the valve stem 18, and the bottom of the packing gland 23 is tightly against the support sleeve 22. The packing gland 23 is fixedly connected to the top of the valve body 1 by bolts.

[0032] Furthermore, a corrugated packing 24 is provided between the top inner wall of the packing chamber 21 and the outer side of the valve stem 18 .

[0033] The packing gland 23 is provided to fix the packing chamber 21 , the support sleeve 22 and the corrugated packing 24 . At this time, the packing chamber 21 and the corrugated packing 24 outside the valve stem 18 can seal the valve body 1 and the valve stem 18 .

[0034] Specifically disclosed, the electric drive unit 3 includes:

[0035] A mounting bracket 31 is fixedly connected to the top of the valve body 1 by bolts, and a connecting sleeve 32 is fixedly installed on the top of the mounting bracket 31;

[0036] The electric actuator 33 is fixedly mounted on the top of the connecting sleeve 32 , and the output end of the electric actuator 33 is transmission-connected with a copper nut 34 , which is rotatably connected to the inner wall and threadedly connected to the top of the valve stem 18 .

[0037] By setting the electric actuator 33, when the electric actuator 33 is working, its output end can drive the copper nut 34 to rotate, thereby causing the valve stem 18 threadedly connected to the copper nut 34 to move vertically, thereby realizing the opening and closing of the valve.

[0038] Furthermore, an anti-rotation disc 35 is fixedly connected to the outside of the mounting bracket 31 , and the anti-rotation disc 35 is movably sleeved on the outside of the valve stem 18 . A positioning bolt is rotatably provided inside the anti-rotation disc 35 , and the end of the positioning bolt contacts the outside of the valve stem 18 .

[0039] By providing the anti-rotation disc 35 , the end of the positioning bolt contacts the outer side of the valve stem 18 , thereby preventing the valve stem 18 from rotating.

[0040] During use, the auxiliary valve flap 17 is installed at the bottom end of the main valve flap 16, and the main valve flap 16 and the auxiliary valve flap 17 can move in the sleeve 14 at the same time. When the main valve flap 16 and the auxiliary valve flap 17 move upward under the action of the valve stem 18, the transmission channels 12 on both sides can be connected through the window 15 at the bottom end of the sleeve 14, thereby realizing the passage. When the main valve flap 16 and the auxiliary valve flap 17 move downward, the bottom end of the main valve flap 16 and the outer ring of the auxiliary valve flap 17 are tightly against the inner wall of the valve seat 13, and the main valve flap 16 and the auxiliary valve flap 17 simultaneously have a sealing effect on the valve seat 13. Even if the auxiliary valve flap 17 is damaged in a high pressure difference environment, the main valve flap 16 can still be sealed. During maintenance, the auxiliary valve flap 17 can be directly replaced.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve, comprising a valve body (1), characterized in that: A cavity (11) is provided inside the valve body (1), and transmission channels (12) communicating with the cavity (11) are provided at both ends of the valve body (1), a valve seat (13) and a sleeve (14) are fixedly installed on the inner wall of the cavity (11), the sleeve (14) is installed above the valve seat (13), and a through window (15) is provided at the top of the sleeve (14), a main valve flap (16) is slidably provided on the inner wall of the sleeve (14), an auxiliary valve flap (17) is installed at the bottom end of the main valve flap (16), and the bottom end of the main valve flap (16) and the outer ring of the auxiliary valve flap (17) are tightly abutted against the inner wall of the valve seat (13), and a valve stem (18) is fixedly installed at the top of the main valve flap (16); The top end of the valve stem (18) extends upward and is connected to a sealing unit (2) and an electric drive unit (3).

2. A high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve according to claim 1, characterized in that: The bottom end of the main valve flap (16) is fixedly connected to the auxiliary valve flap (17) via bolts.

3. A high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve according to claim 1, characterized in that: The sealing unit (2) comprises: A packing chamber (21), the packing chamber (21) is installed inside the valve body (1) and is movably sleeved on the outside of the valve stem (18); A support sleeve (22), wherein the support sleeve (22) is installed on the top of the packing chamber (21), and the support sleeve (22) is movably sleeved on the outer side of the valve stem (18); A packing gland (23) is movably sleeved on the outside of the valve stem (18), and the lower part of the packing gland (23) is tightly against the support sleeve (22). The packing gland (23) is fixedly connected to the top of the valve body (1) by bolts.

4. A high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve according to claim 3, characterized in that: A corrugated packing (24) is provided between the top inner wall of the packing chamber (21) and the outer side of the valve stem (18).

5. The high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve according to claim 1, characterized in that: The electric drive unit (3) comprises: A mounting bracket (31), wherein the mounting bracket (31) is fixedly connected to the top of the valve body (1) via bolts, and a connecting sleeve (32) is fixedly mounted on the top of the mounting bracket (31); An electric actuator (33) is fixedly mounted on the top of the connecting sleeve (32), and the output end of the electric actuator (33) is transmission-connected with a copper nut (34), which is rotatably connected to the inner wall and threadedly connected to the top end of the valve stem (18).

6. A high-pressure differential detachable movable auxiliary valve disc double-sealed stop valve according to claim 5, characterized in that: The outer side of the mounting bracket (31) is fixedly connected with an anti-rotation disc (35), which is movably sleeved on the outer side of the valve stem (18). A positioning bolt is rotatably provided inside the anti-rotation disc (35), and the end of the positioning bolt contacts the outer side of the valve stem (18).

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