Adjustable low-temperature gate valve

Abstract

The utility model relates to the technical field of low-temperature gate valves, in particular to an adjustable low-temperature gate valve which comprises a valve body, a valve cover and a valve plate assembly, the valve body is provided with a flow inlet and a flow outlet, the flow outlet is further provided with an adjusting pipe, and the adjusting pipe and the flow outlet rotate in the circumferential direction and are connected in a sliding mode. The adjusting pipe and the flow outlet are connected in a sliding and rotating mode, the position of the adjusting pipe can be freely adjusted, in the actual installation process, the extending length of the adjusting pipe can be adjusted, the circumferential position of the adjusting pipe can be properly adjusted, and therefore the adjusting pipe can be conveniently and rapidly installed, and the service life of the adjusting pipe is prolonged. The connecting flange at the end of the adjusting pipe is connected and matched with a flange on a follow-up pipeline, so that installation and assembly errors are eliminated, the applicability of the adjusting pipe is further optimized, the position of the adjusting pipe is locked and fixed through the clamping mechanism after adjustment is completed, and operation is efficient, convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic gate valves, in particular to an adjustable cryogenic gate valve. Background Art

[0002] The characteristics of cryogenic gate valves include compact structure, reasonable design, good valve rigidity, smooth channels, and small flow resistance coefficients. Their sealing surfaces are usually made of stainless steel and hard alloy, ensuring a long service life.

[0003] A gate valve generally includes a valve body, a valve stem, and a valve plate. Connecting flanges are fixedly provided at both ends of the existing valve body and are connected to pipelines through the connecting flanges. Currently, some cryogenic gate valve structures adopt the design of adding an adjusting pipe at the outlet to achieve the variability of the connection length. For example, an adjustable cryogenic gate valve disclosed in Chinese Patent Publication No. "CN208185561 U" includes a valve body, a valve cover, a valve stem, and a valve plate.

[0004] The currently adopted length adjustment method is to use a screw for locking and guiding. This structure requires reciprocating disassembly of nuts during adjustment, resulting in low adjustment efficiency. Secondly, due to the guiding limitation of the screw, the adjusting pipe can only achieve a linear length position and cannot perform circumferential angle adjustment and adaptation. Therefore, there are still certain inconveniences during actual installation. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages in the prior art that a screw is used for locking and guiding, and this structure requires reciprocating disassembly of nuts during adjustment, resulting in low adjustment efficiency, etc., and to propose an adjustable cryogenic gate valve.

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

[0007] Design an adjustable cryogenic gate valve, including a valve body, a valve cover, and a valve plate assembly.

[0008] The valve body has an inlet and an outlet, and an adjusting pipe is further provided on the outlet. The adjusting pipe is circumferentially rotatable and slidably connected to the outlet.

[0009] Among them, a clamping mechanism is further provided outside the outlet, and at least part of the clamping mechanism is located outside the adjusting pipe.

[0010] Further, there is a constricted surface inside the end of the outlet, and a stepped opening is provided inside the end of the adjusting pipe. The stepped opening is inserted and adapted to the constricted surface.

[0011] Among them, at least one annular groove is opened on the constricted surface, and a sealing ring is sleeved in the annular groove.

[0012] Further, the clamping mechanism includes a first clamping plate and a second clamping plate which are rotatably connected;

[0013] A waist-shaped hole is formed in the lower side of the second clamping plate, a limiting member located in the waist-shaped hole is arranged outside the outflow port, and a connecting structure is arranged between the first clamping plate and the second clamping plate.

[0014] Further, the connecting structure includes a pull rod rotatably connected to the end of the second clamping plate, and an avoidance port for placing the pull rod is formed in the first clamping plate;

[0015] Wherein, a lever is rotatably connected to the outside of the pull rod, and a cam for abutting against the upper end face of the first clamping plate is fixedly installed on the outside of the lever.

[0016] Further, two gaskets are sleeved on the outside of the pull rod, and a spring is arranged between the two gaskets.

[0017] Further, an observation port is formed at the top of the first clamping plate, and the observation port is a linear slot extending along the sliding direction of the adjusting pipe.

[0018] An adjustable cryogenic gate valve proposed by the present utility model has the beneficial effects that: in the present utility model, the adjustable pipe is slidably and rotatably connected to the outflow port, so that the position of the adjustable pipe can be freely adjusted. During actual installation, not only the extension length of the adjustable pipe can be adjusted, but also the circumferential position of the adjustable pipe can be appropriately adjusted, so that the connecting flange at its end is adapted to the flange on the subsequent pipeline, thereby eliminating installation and assembly errors, further optimizing its applicability. After the adjustment is completed, the position of the adjustable pipe can be locked and fixed by the clamping mechanism, and the operation is efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the limiting member of the present utility model;

[0021] Figure 3 is a structural schematic diagram of the outflow port of the present utility model;

[0022] Figure 4 is a sectional view of the valve body of the present utility model;

[0023] Figure 5 is a structural schematic diagram of the clamping mechanism of the present utility model.

[0024] In the figure: 1. Valve body; 11. Inlet port; 12. Outlet port; 13. Retracted surface; 14. Step port; 15. Sealing ring; 2. Valve cover; 3. Valve plate assembly; 4. Adjusting pipe; 5. Clamping mechanism; 51. First clamping plate; 511. Observation port; 52. Second clamping plate; 53. Kidney-shaped hole; 54. Limiting member; 55. Tie rod; 56. Avoidance port; 57. Leveraging member; 58. Cam; 59. Gasket; 591. Spring. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1-5 As an embodiment of the present invention, it discloses an adjustable cryogenic gate valve, which is used to solve the problems that the current adjustable gate valve is inconvenient to adjust and cannot realize the circumferential position adjustment and adaptation of the connecting flange to achieve better installation adaptation ability. Specifically, the cryogenic gate valve described in the present invention includes a valve body 1, a valve cover 2 and a valve plate assembly 3. The specific structures and installation methods of the valve body 1, the valve cover 2 and the valve plate assembly 3 are all conventional technical means of those skilled in the art, and will not be elaborated here;

[0027] It should be further pointed out that in this embodiment, the valve body 1 has an inlet port 11 and an outlet port 12, and an adjusting pipe 4 is further provided on the outlet port 12. The adjusting pipe 4 is circumferentially rotatable and slidably connected to the outlet port 12. Specifically, as Figure 1 shown, in this embodiment, connecting flanges are fixed at the outer ends of both the inlet port 11 and the adjusting pipe 4, and mounting holes are provided on the connecting flanges;

[0028] Among them, a clamping mechanism 5 is further provided outside the outlet port 12, and at least part of the clamping mechanism 5 is located outside the adjusting pipe 4.

[0029] In some embodiments, there is a retracted surface 13 inside the end of the outlet port 12, and a step port 14 is provided inside the end of the adjusting pipe 4. The step port 14 is inserted and adapted to the retracted surface 13;

[0030] Among them, at least one annular groove is provided on the retracted surface 13, and a sealing ring 15 is sleeved in the annular groove. Preferably, two annular grooves are provided in this embodiment, that is, two corresponding sealing rings 15 are also provided. The sealing method with two sealing rings 15 is used to improve the sealing performance of the sliding connection.

[0031] Based on the above embodiments, in this embodiment, the clamping mechanism 5 includes a first clamping plate 51 and a second clamping plate 52 that are rotatably connected. The first clamping plate 51 and the second clamping plate 52 together form an annular clamping member to lock and fix the position of the adjusting pipe 4 after the position adjustment.

[0032] A waist-shaped hole 53 is formed on the lower side of the second clamping plate 52. A limiting member 54 located in the waist-shaped hole 53 is arranged on the outer side of the outflow port 12. Specifically, the limiting member 54 in the present utility model is a bolt threadedly connected to the second clamping plate 52. It should be noted that the bolt in this embodiment does not lock and fix the second clamping plate 52. It only serves as a lateral position limit for the second clamping plate 52 to prevent it from sliding on the outer side of the outflow port 12. The provided waist-shaped hole 53 is used to adapt to the deformation requirement of the second clamping plate 52 during clamping and fixing to ensure the stability of clamping. A connection structure is arranged between the first clamping plate 51 and the second clamping plate 52.

[0033] In summary, in the present utility model, the first clamping plate 51 is limited on the outer side of the outflow port 12 to install and limit the entire clamping mechanism 5 to prevent it from sliding left and right. Secondly, at least part of the first clamping plate 51 and the second clamping plate 52 is located on the outer side of the adjusting pipe 4, and the maximum sliding position length of at least part of the adjusting pipe 4 is ensured so that the first clamping plate 51 and the second clamping plate 52 can clamp and connect the adjusting pipe 4. Among them, those skilled in the art know that anti-slip particles can also be arranged on the opposite surfaces of the outflow port 12, the adjusting pipe 4, the first clamping plate 51, and the second clamping plate 52 to enhance the stability after clamping.

[0034] In some embodiments, the connection structure in this embodiment includes a pull rod 55 rotatably connected to the end of the second clamping plate 52. An avoidance opening 56 for placing the pull rod 55 is formed on the first clamping plate 51.

[0035] Wherein, a lever 57 is rotatably connected to the outer side of the pull rod 55, and a cam 58 for abutting against the upper end surface of the first clamping plate 51 is fixedly installed on the outer side of the lever 57.

[0036] Preferably, two pull rods 55 and two avoidance openings 56 are provided in this embodiment to ensure the force on both sides of the second clamping plate 52 and improve the locking stability. In addition, the lever 57 is a bent ring-shaped member, and this ring-shaped member is rotatably connected between the two pull rods 55. The cam 58 is fixed on the ring-shaped member. During operation, the lever 57 drives the cam 58 to rotate, making the first clamping plate 51 and the second clamping plate 52 relatively close to each other to lock and fix the position of the adjusting pipe 4.

[0037] In addition, in order to enhance the rapidity of the separation action after the disassembly between the first clamping plate 51 and the second clamping plate 52, in this embodiment, two gaskets 59 are sleeved outside the pull rod 55, and a spring 591 is arranged between the two gaskets 59. That is, when the above-mentioned lever 57 is toggled, when the cam 58 disengages from the upper end surface of the first clamping plate 51, at this time, the reaction force of the spring 591 opens the first clamping plate 51 and the second clamping plate 52. At this time, the pull rod 55 can be rotated to disengage it from the inside of the avoidance opening 56, so as to separate the first clamping plate 51 and the second clamping plate 52.

[0038] Furthermore, in order to facilitate the convenient penetration of the adjustment position of the adjustment tube 4, in this embodiment, an observation opening 511 is opened at the top of the first clamping plate 51. The observation opening 511 is a linear slot extending along the sliding direction of the adjustment tube 4. Of course, scale markings can also be arranged inside the linear slot to display the adjustment length of the current adjustment tube 4.

[0039] In summary, in the present utility model, the adjustable tube 4 is slidably and rotatably connected to the outflow port 12, which can realize the free adjustment of the position of the adjustable tube 4. During actual installation, not only can the extension length of the adjustable tube 4 be adjusted, but also the circumferential position of the adjustable tube 4 can be appropriately adjusted so that the connecting flange at its end is adapted to the flange connection on the subsequent pipeline, so as to eliminate installation and assembly errors, further optimizing its applicability. After the adjustment is completed, the position of the adjustable tube 4 can be locked and fixed by the clamping mechanism 5, and the operation is efficient and convenient.

[0040] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An adjustable cryogenic gate valve, comprising a valve body (1), a valve cover (2) and a valve plate assembly (3), characterized in that: The valve body (1) has an inlet port (11) and an outlet port (12), and an adjusting pipe (4) is further provided on the outlet port (12), and the adjusting pipe (4) is circumferentially rotatable and slidably connected to the outlet port (12); Wherein, a clamping mechanism (5) is further provided outside the outlet port (12), and at least part of the clamping mechanism (5) is located outside the adjusting pipe (4).

2. The adjustable cryogenic gate valve according to claim 1, wherein: There is a constricted surface (13) inside the end of the outlet port (12), and a stepped opening (14) is provided inside the end of the adjusting pipe (4), and the stepped opening (14) is inserted and adapted to the constricted surface (13); Wherein, at least one annular groove is provided on the constricted surface (13), and a sealing ring (15) is sleeved in the annular groove.

3. An adjustable cryogenic gate valve according to claim 2, characterized in that: The clamping mechanism (5) includes a first clamping plate (51) and a second clamping plate (52) which are rotatably connected; A waist-shaped hole (53) is provided on the lower side of the second clamping plate (52), a limiting member (54) located in the waist-shaped hole (53) is provided outside the outlet port (12), and a connecting structure is provided between the first clamping plate (51) and the second clamping plate (52).

4. An adjustable cryogenic gate valve according to claim 3, characterized in that: The connecting structure includes a pull rod (55) rotatably connected to the end of the second clamping plate (52), and an avoidance opening (56) for placing the pull rod (55) is provided on the first clamping plate (51); Wherein, a levering member (57) is rotatably connected to the outside of the pull rod (55), and a cam (58) for abutting against the upper end surface of the first clamping plate (51) is fixedly installed on the outside of the levering member (57).

5. An adjustable cryogenic gate valve according to claim 4, characterized in that: Two gaskets (59) are sleeved on the outside of the pull rod (55), and a spring (591) is provided between the two gaskets (59).

6. An adjustable cryogenic gate valve according to claim 4, characterized in that: An observation port (511) is provided at the top of the first clamping plate (51), and the observation port (511) is a linear slot extending along the sliding direction of the adjusting pipe (4).

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