Double-seal valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a double-seal valve which comprises a shell. A sealing assembly is arranged in the middle of the shell; the middle part of the shell is in contact with a sealing cover; a sealing groove is formed in the side wall of the sealing cover; the middle part of the shell is fixedly connected with a sealed air bag; the sealing air bag is in contact with the inner wall of the sealing groove; the side wall of the sealing cover is fixedly connected with a fixed cylinder; the inner wall of the fixed cylinder is in threaded connection with a threaded rod; the outer wall of the threaded rod is rotationally connected with a hinge ring. A connecting plate is hinged to the end part of the hinge ring; a fixed block is hinged to the end part of the connecting plate; the side wall of the fixed block is fixedly connected with an arc-shaped plate; the arc-shaped plate is connected to the side wall of the sealing cover in a sliding mode, the shell and the sealing cover form a sealing assembly through the arranged protection shell, the valve does not need to be overall disassembled during disassembly, and convenience and rapidness are achieved. Meanwhile, the fixing cylinder, the connecting plate and other parts are matched with one another, the cover plate can be rapidly detached, multiple sets of bolts do not need to be screwed, and operation convenience is further improved.

Description

A double-sealed valve Technical Field

[0001] This utility model belongs to the field of valve technology, specifically a double-sealed valve. Background Technology

[0002] Double-seal valves are valves that employ a dual-seal structure. Through the design of two sealing rings or sealing surfaces, they achieve bidirectional sealing of the medium in the pipeline, effectively preventing medium leakage and improving the valve's sealing performance and reliability.

[0003] In current technologies, most bidirectional sealing valves rely on flange structures to connect to pipelines at both ends in practical applications. To ensure a stable connection, multiple sets of bolts are usually used to tighten the flanges. Based on the self-locking principle of bolts, this connection method can effectively maintain the stability of the pipeline system, ensure a tight connection between the valve and the pipeline, and meet the sealing and pressure requirements of fluid transportation and other operating conditions.

[0004] However, the housing of some double-seal valves connected to pipelines is often designed as a single piece. During long-term use, the internal sealing elements (such as ball valves) of double-seal valves are prone to wear. At this time, disassembly, replacement and maintenance are required. However, during disassembly, the valve must be completely removed from the pipeline to operate the internal components. In this process, repeated disassembly and reassembly of the bolts connecting the pipeline can easily lead to thread wear, thereby weakening the stability of the connection. This greatly reduces the practicality of such valves in actual applications. Therefore, a double-seal valve is proposed to address the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a double-sealed valve.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A double-sealed valve of this utility model includes a housing; a sealing assembly is provided in the middle of the housing; a sealing cover is in contact with the middle of the housing; a sealing groove is opened on the side wall of the sealing cover; a sealing airbag is fixedly connected to the middle of the housing; the sealing airbag is in contact with the inner wall of the sealing groove; a fixing cylinder is fixedly connected to the side wall of the sealing cover; a threaded rod is threadedly connected to the inner wall of the fixing cylinder; a hinge ring is rotatably connected to the outer wall of the threaded rod; a connecting plate is hinged to the end of the hinge ring; a fixing block is hinged to the end of the connecting plate; an arc-shaped plate is fixedly connected to the side wall of the fixing block; the arc-shaped plate is slidably connected to the side wall of the sealing cover; a limit block is fixedly connected to the end of the arc-shaped plate; a rectangular shell is fixedly connected to the top of the housing; a limit groove is opened on the inner wall of the rectangular shell; the end of the limit block is in contact with the inner wall of the limit groove.

[0007] Preferably, an air inlet pipe is fixedly connected to the side wall of the housing; the end of the air inlet pipe is installed on the side wall of the sealing airbag; a sealing cylinder is fixedly connected to the side wall of the housing; a second one-way valve is installed on the side wall of the sealing cylinder; the other end of the air inlet pipe is installed at the end of the second one-way valve; a first one-way valve is fixedly connected to the end of the sealing cylinder; a piston block is piston-connected to the inner wall of the sealing cylinder; a sliding rod is fixedly connected to the end of the piston block; the sliding rod is slidably connected to the other end of the sealing cylinder.

[0008] Preferably, the sealing assembly includes an actuator; a sealing ball is mounted at the bottom of the actuator; and the sealing ball is driven by the actuator; a ring is rotatably connected to the outer wall at the bottom of the actuator; a through groove is formed on the inner wall at the top of the sealing cover; multiple sets of through grooves are provided; and multiple sets of through grooves are formed on the inner wall at the top of the housing; the ring contacts the inner wall of the through groove.

[0009] Preferably, the fixed cylinder has an annular groove at its end; the hinge ring is fixedly connected to a sealing ring at its end; and the sealing ring contacts the inner wall of the annular groove.

[0010] Preferably, the inner wall of the annular groove is provided with a groove; the end of the sealing ring is fixedly connected to a round rod, and there are multiple sets of them; the round rod is slidably connected to the inner wall of the annular groove.

[0011] Preferably, multiple sets of the connecting plate, fixing block, arc plate, rectangular shell, and limiting block are provided; and the multiple sets of connecting plate, fixing block, arc plate, rectangular shell, and limiting block are symmetrically arranged with the center line of the sealing cover as the axis of symmetry.

[0012] Preferably, an exhaust pipe is fixedly connected to the top of the intake pipe; a sealing plug is installed on the inner wall of the top of the exhaust pipe; the sealing plug and the exhaust pipe are interference fit.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model provides a double-sealed valve, in which a protective shell for the sealing assembly is formed by the combination of a housing and a sealing cover. This ensures that when the sealing assembly needs to be disassembled, it is not necessary to remove the entire valve from the pipeline, thus improving convenience. Furthermore, through the cooperation of the fixed cylinder, connecting plate, fixed block, arc plate, threaded rod, hinge ring, limit block and rectangular shell, the cover plate can be quickly disassembled without having to rotate multiple sets of bolts, further improving convenience.

[0015] 2. This utility model provides a double-sealed valve. Through the cooperation of the sealing cylinder, one-way valve one, one-way valve two, air inlet pipe, sealing airbag, round rod and piston block, the joint between the sealing cover and the housing can be sealed. Moreover, the size of the sealing airbag can be adjusted so that the gap between the sealing cover and the housing can be fully filled, thereby improving the sealing performance. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 is a perspective view of the overall device of this utility model;

[0018] Figure 2 is a rear perspective view of the overall device in this utility model;

[0019] Figure 3 is a three-dimensional sectional view of the shell and sealing cover of this utility model.

[0020] Figure 4 is a three-dimensional sectional view of the fixed cylinder and threaded rod in this utility model.

[0021] Figure 5 is a perspective view of the sealing cap in this utility model;

[0022] Figure 6 is a cross-sectional perspective view of the sealing sleeve and piston block in this utility model;

[0023] Figure 7 is a perspective view of the driver and sealing ball in this utility model;

[0024] Figure 8 is an enlarged perspective view of region A in Figure 3 of this utility model.

[0025] Legend:

[0026] 1. Housing; 2. Sealing cover; 21. Through groove; 22. Sealing groove; 3. Actuator; 31. Circular ring; 32. Sealing ball; 4. Fixing cylinder; 41. Connecting plate; 42. Fixing block; 43. Arc plate; 44. Rectangular shell; 45. Threaded rod; 46. Hinge ring; 47. Limiting block; 48. Sealing ring; 49. Round rod; 410. Annular groove; 411. Groove; 412. Limiting groove; 5. Sealing cylinder; 51. One-way valve one; 52. One-way valve two; 53. Inlet pipe; 54. Sealing airbag; 55. Sealing plug; 56. Sliding rod; 57. Piston block; 58. Outlet pipe. 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] Specific implementation examples are given below.

[0029] Please refer to Figures 1-8. This utility model provides a double-sealed valve, including a housing 1; a sealing assembly is provided in the middle of the housing 1; a sealing cover 2 is in contact with the middle of the housing 1; a sealing groove 22 is formed on the side wall of the sealing cover 2; a sealing airbag 54 is fixedly connected to the middle of the housing 1; the sealing airbag 54 contacts the inner wall of the sealing groove 22; a fixing cylinder 4 is fixedly connected to the side wall of the sealing cover 2; a threaded rod 45 is threadedly connected to the inner wall of the fixing cylinder 4; a hinge ring 46 is rotatably connected to the outer wall of the threaded rod 45; a connecting plate 41 is hinged to the end of the hinge ring 46; the end of the connecting plate 41... A fixing block 42 is hinged to the part; an arc-shaped plate 43 is fixed to the side wall of the fixing block 42; the arc-shaped plate 43 is slidably connected to the side wall of the sealing cover 2; a limit block 47 is fixed to the end of the arc-shaped plate 43; a rectangular shell 44 is fixed to the top of the housing 1; a limit groove 412 is opened on the inner wall of the rectangular shell 44; the end of the limit block 47 contacts the inner wall of the limit groove 412; during operation, the valve is connected to the pipeline through the flange shells at both ends of the housing (1); after a period of use, when it is necessary to inspect and replace the internal sealing components, the sealing cover (2) can be removed. It is not necessary to disassemble the entire device from the pipeline, which reduces the risk of wear on the bolts of the fixed pipeline due to repeated disassembly and assembly, and ensures the sealing of the connection between the pipeline and the shell (1). The specific operation is as follows: First, rotate the threaded rod (45). The outer wall of the threaded rod (45) will slide circumferentially on the inner wall of the hinge ring (46). Since the threaded rod (45) and the fixed cylinder (4) are connected by threads, the threaded rod (45) will slowly move out of the inner wall of the fixed cylinder (4) through the threaded engagement. The hinge ring (46) will also move accordingly. At this time, the angle of the connecting plate (41) will change. The change occurs, and at the same time, its end will rotate between the hinge ring (46), while the other end of the connecting plate (41) will rotate between the fixing block (42), and through the fixing block (42), the arc plate (43) will slide on the side wall of the sealing cover (2). The arc plate (43) will drive the limiting block (47) to move until the limiting block (47) is completely separated from the inner wall of the limiting groove (412). At this time, the sealing cover (2) can be removed, and the sealing assembly will be exposed. It can be disassembled and repaired directly without having to disassemble and install by rotating multiple sets of bolts, which improves convenience.

[0030] Further, as shown in Figures 2-3 and 6, an air inlet pipe 53 is fixedly connected to the side wall of the housing 1; the end of the air inlet pipe 53 is installed on the side wall of the sealing airbag 54; a sealing cylinder 5 is fixedly connected to the side wall of the housing 1; a one-way valve 2 52 is installed on the side wall of the sealing cylinder 5; the other end of the air inlet pipe 53 is installed on the end of the one-way valve 2 52; a one-way valve 1 51 is fixedly connected to the end of the sealing cylinder 5; a piston block 57 is piston-connected to the inner wall of the sealing cylinder 5; a sliding rod 56 is fixedly connected to the end of the piston block 57; the sliding rod 56 is slidably connected to the other end of the sealing cylinder 5. During operation, when the housing (1) and the sealing cover (2) are closed and fixed together, the sealing airbag (54) can seal the contact surface between the housing (1) and the sealing cover (2). The sealing effect can be ensured by adjusting the gas inside the sealing airbag (54) to change its size. The specific operation is as follows: the sliding rod (56) can be pulled repeatedly. (56) will drive the piston block (57) to move in the inner wall of the sealing cylinder (5). In this way, the outside air will enter the inside of the sealing cylinder (5) through the one-way valve (51), and then enter the inside of the air inlet pipe (53) through the one-way valve (52). Then it can enter the inner wall of the sealing airbag (54). In this way, the amount of air inside the sealing airbag (54) will change, and the sealing performance will also change. Compared with the direct use of the sealing strip, there is no need to worry about it deforming after long-term use and being unable to recover. The sealing effect is guaranteed and the practicality is improved. It should be noted that the one-way valve (51) and the one-way valve (52) are both existing technologies. Gas can only flow in one direction through them. The outside air can enter the inside of the sealing cylinder (5) through the one-way valve (51) and will not flow out through it. The one-way valve (52) is the opposite. The specific operation and installation methods are understood by those in this field, so they will not be introduced in detail here.

[0031] Furthermore, as shown in Figures 1-3, 5, and 7, the sealing assembly includes a driver 3; a sealing ball 32 is mounted on the bottom of the driver 3; and the sealing ball 32 is driven by the driver 3; a ring 31 is rotatably connected to the outer wall of the bottom of the driver 3; a through groove 21 is provided on the inner wall of the top of the sealing cover 2; multiple sets of through grooves 21 are provided; and multiple sets of through grooves 21 are provided on the inner wall of the top of the housing 1; the ring 31 contacts the inner wall of the through groove 21. During operation, the driver (3) can drive the sealing ball (32) to rotate. The sealing ball (32) can seal both sides of the inner wall of the housing (1) at the same time. Its movement principle and method are existing technologies and are known to those skilled in the art, so they will not be described in detail here. When installing the sealing assembly, the ring (31) needs to be clamped in the inner wall of the through groove (21) opened on the inner wall of the top of the housing (1), and then the sealing cover (2) is closed and the ring (31) is clamped in the inner wall of the through groove (21). In this way, when installing the sealing assembly, it is not necessary to use multiple sets of bolts for fixing, which improves practicality.

[0032] Furthermore, as shown in Figure 4, an annular groove 410 is provided at the end of the fixed cylinder 4; a sealing ring 48 is fixedly connected to the end of the hinge ring 46; the sealing ring 48 contacts the inner wall of the annular groove 410. During operation, after the housing (1) and the sealing cover (2) are combined and fixed, the sealing ring (48) will contact the inner wall of the annular groove (410), ensuring the sealing of the threaded connection between the fixed cylinder (4) and the threaded rod (45), reducing the risk of external corrosion and improving the service life.

[0033] Furthermore, as shown in Figure 4, the inner wall of the annular groove 410 is provided with a groove 411; the end of the sealing ring 48 is fixedly connected with a round rod 49 and there are multiple sets of them; the round rod 49 is slidably connected to the inner wall of the annular groove 410. During operation, the multiple sets of round rods (49) ensure that the hinge ring (46) can move horizontally stably when the threaded rod (45) rotates.

[0034] Furthermore, as shown in Figures 1 and 3, multiple sets of the connecting plate 41, fixing block 42, arc plate 43, rectangular shell 44, and limiting block 47 are provided; and multiple sets of connecting plates 41, fixing block 42, arc plate 43, rectangular shell 44, and limiting block 47 are symmetrically arranged with the center line of the sealing cover 2 as the axis of symmetry. During operation, by setting multiple sets of connecting plates 41, fixing block 42, arc plate 43, rectangular shell 44, and limiting block 47, the stability of the sealing cover (2) installation can be guaranteed.

[0035] Furthermore, as shown in Figure 6, an exhaust pipe 58 is fixedly connected to the top of the intake pipe 53; a sealing plug 55 is installed on the inner wall of the top of the exhaust pipe 58; the sealing plug 55 and the exhaust pipe 58 are interference fit. During operation, by opening the sealing plug (55), the gas inside the sealing airbag (54) will be discharged along the intake pipe (53) and the exhaust pipe (58). The size of the sealing airbag (54) can be adjusted. After exhaust is completed, the sealing plug (55) can be inserted into the inner wall of the exhaust pipe (58).

[0036] Working principle: When the sealing cover (2) needs to be removed, the threaded rod (45) can be rotated. The outer wall of the threaded rod (45) will slide circumferentially on the inner wall of the hinge ring (46). Since the threaded rod (45) and the fixed cylinder (4) are connected by threads, the threaded rod (45) will slowly move out of the inner wall of the fixed cylinder (4) through the threaded engagement. The hinge ring (46) will also move accordingly. At this time, the angle of the connecting plate (41) will change, and its end will rotate with the hinge ring (46). The other end of the connecting plate (41) will rotate with the fixing block (42), and the fixing block (42) will drive the arc plate (43) to slide on the side wall of the sealing cover (2). The arc plate (43) will drive the limiting block (47) to move until the limiting block (47) is completely separated from the inner wall of the limiting groove (412). At this time, the sealing cover (2) can be removed, and the sealing assembly will be exposed. It can be disassembled and repaired directly without having to disassemble and install by rotating multiple sets of bolts, which improves convenience.

[0037] When the housing (1) and the sealing cover (2) are joined and fixed together, the sealing airbag (54) can seal the contact surface between the housing (1) and the sealing cover (2). The sealing effect can be ensured by adjusting the gas inside the sealing airbag (54) to change its size. The specific operation is as follows: the slide rod (56) can be pulled repeatedly. The slide rod (56) will drive the piston block (57) to move in piston motion on the inner wall of the sealing cylinder (5). In this way, the outside air will enter the interior of the sealing cylinder (5) through the one-way valve (51). Then, it enters the air intake pipe (53) through the one-way valve (52), and then enters the inner wall of the sealing airbag (54). This changes the amount of air inside the sealing airbag (54) and the sealing performance. Compared with using a sealing strip directly, there is no need to worry about it deforming after long-term use and not being able to recover. This ensures the sealing effect and improves practicality. When it is necessary to exhaust air, the sealing plug (55) can be opened. At this time, the gas inside the sealing airbag (54) will be discharged along the air intake pipe (53) and the air outlet pipe (58).

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A double-sealed valve, comprising a housing (1); characterized in that: A sealing assembly is provided in the middle of the housing (1); a sealing cover (2) is in contact with the middle of the housing (1); a sealing groove (22) is provided on the side wall of the sealing cover (2); a sealing airbag (54) is fixedly connected to the middle of the housing (1); the sealing airbag (54) contacts the inner wall of the sealing groove (22); a fixing cylinder (4) is fixedly connected to the side wall of the sealing cover (2); a threaded rod (45) is threadedly connected to the inner wall of the fixing cylinder (4); a hinge ring (46) is rotatably connected to the outer wall of the threaded rod (45); the hinge ring ( 46) A connecting plate (41) is hinged at the end; a fixing block (42) is hinged at the end of the connecting plate (41); an arc plate (43) is fixed to the side wall of the fixing block (42); the arc plate (43) is slidably connected to the side wall of the sealing cover (2); a limiting block (47) is fixed to the end of the arc plate (43); a rectangular shell (44) is fixed to the top of the housing (1); a limiting groove (412) is opened on the inner wall of the rectangular shell (44); the end of the limiting block (47) contacts the inner wall of the limiting groove (412).

2. A double seal valve according to claim 1, wherein: An air inlet pipe (53) is fixedly connected to the side wall of the housing (1); the end of the air inlet pipe (53) is installed on the side wall of the sealing airbag (54); a sealing cylinder (5) is fixedly connected to the side wall of the housing (1); a one-way valve (52) is installed on the side wall of the sealing cylinder (5); the other end of the air inlet pipe (53) is installed on the end of the one-way valve (52); a one-way valve (51) is fixedly connected to the end of the sealing cylinder (5); a piston block (57) is piston-connected to the inner wall of the sealing cylinder (5); a slide rod (56) is fixedly connected to the end of the piston block (57); the slide rod (56) is slidably connected to the other end of the sealing cylinder (5).

3. A double-seal valve according to claim 1, characterized in that: The sealing assembly includes a driver (3); a sealing ball (32) is installed at the bottom of the driver (3); and the sealing ball (32) is driven by the driver (3); a ring (31) is rotatably connected to the outer wall at the bottom of the driver (3); a through groove (21) is provided on the inner wall at the top of the sealing cover (2); multiple sets of through grooves (21) are provided; and multiple sets of through grooves (21) are provided on the inner wall at the top of the housing (1); the ring (31) contacts the inner wall of the through groove (21).

4. The dual seal valve of claim 1, wherein: The fixed cylinder (4) has an annular groove (410) at its end; the hinge ring (46) has a sealing ring (48) fixedly connected to its end; the sealing ring (48) contacts the inner wall of the annular groove (410).

5. A double-seal valve according to claim 4, wherein: The inner wall of the annular groove (410) is provided with a groove (411); the end of the sealing ring (48) is fixedly connected with a round rod (49) in multiple sets; the round rod (49) is slidably connected to the inner wall of the annular groove (410).

6. The dual seal valve of claim 1, wherein: The connecting plate (41), fixing block (42), arc plate (43), rectangular shell (44), and limiting block (47) are provided in multiple sets; and the multiple sets of connecting plate (41), fixing block (42), arc plate (43), rectangular shell (44), and limiting block (47) are symmetrically arranged with the center line of the sealing cover (2) as the axis of symmetry.

7. A double seal valve as defined in claim 2, wherein: An air outlet pipe (58) is fixedly connected to the top of the air inlet pipe (53); a sealing plug (55) is installed on the inner wall of the top of the air outlet pipe (58); the sealing plug (55) and the air outlet pipe (58) are interference fit.

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