Low-temperature-resistant LNG (Liquefied Natural Gas) liquid level meter protection device

Abstract

The low-temperature-resistant LNG liquid level meter protection device is characterized in that an annular step is convexly arranged on the inner wall of the end, facing a drainage pipe, of a protection cover, an annular turned edge is convexly arranged on the end face, facing the drainage pipe, of the annular step, and a first sliding way is concavely arranged on the inner wall of the end, facing the drainage pipe, of the protection cover; the end, away from the drainage tube, of the first sliding way is vertically provided with a second sliding way, the end, away from the first sliding way, of the second sliding way is vertically provided with a third sliding way, the drainage tube can be inserted between the annular turned-over edge and the protective cover, and a sliding block is arranged on the drainage tube in a protruding mode and connected with the first sliding way, the second sliding way and the third sliding way in a sliding mode. One end of the spring is fixedly connected with the annular step. After the drainage tube is inserted, the sliding block slides to the bottom along the first sliding way, the drainage tube is rotated to enable the sliding block to slide along the second sliding way, and when the sliding block slides to the third sliding way, the sliding block is jacked into the third flow channel under the influence of elastic force, so that assembly and overall disassembly are convenient, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of cryogenic level gauge technology, and in particular to a cryogenic LNG level gauge protection device. Background Technology

[0002] Currently, existing level gauge protection devices involve connecting the protective cover and the drain pipe with threads for assembly and disassembly, which is cumbersome and affects production efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a cryogenic LNG level gauge protection device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This application discloses a cryogenic LNG level gauge protection device, including a protective cover and a drain pipe. The device is characterized by: an annular step protruding from the inner wall of the protective cover facing the drain pipe; an annular flange protruding from the end face of the annular step facing the drain pipe; a first slide rail recessed from the inner wall of the protective cover facing the drain pipe; a second slide rail perpendicularly disposed at the end of the first slide rail away from the drain pipe; a third slide rail perpendicularly disposed at the end of the second slide rail away from the first slide rail; the drain pipe being able to be inserted between the annular flange and the protective cover; a slider protruding from the outer wall of the drain pipe; the slider being slidably connected to the first, second, and third slide rails; a spring sleeved on the annular flange; one end of the spring being fixedly connected to the annular step; and the other end of the spring abutting against the end face of the drain pipe.

[0006] As a further improvement of the present invention, the annular flange is coaxially arranged with the protective cover and the drainage tube.

[0007] As a further improvement of the present invention, at least one pair of the first slide rails are provided, and at least one pair of the first slide rails are symmetrically arranged.

[0008] As a further improvement of the present invention, the length of the third slide is less than the length of the first slide, and the end of the third slide that is not connected to the second slide is set toward the drainage pipe.

[0009] As a further improvement of the present invention, a sealing ring is sandwiched between the inner wall of the drainage tube and the outer wall of the annular step.

[0010] Compared with the prior art, the advantages of the present invention are as follows:

[0011] After the drainage tube is inserted, the slider slides to the bottom along the first slide. Rotating the drainage tube causes the slider to slide along the second slide. When it slides to the third slide, the slider is pushed into the third flow channel by the elastic force, thus realizing assembly. The whole assembly and disassembly are convenient and improve production efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 The diagram shown is a structural schematic of the housing of the vehicle-mounted hydrogen concentration sensor in a specific embodiment of the present invention.

[0014] Figure 2 The diagram shown is a structural schematic of the first slide, the second slide, and the third slide in a specific embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-2 In one embodiment, the device includes a protective cover 1 and a drainage tube 2. An annular step 3 protrudes from the inner wall of the protective cover 1 facing the drainage tube 2. An annular flange 4 protrudes from the end face of the annular step 3 facing the drainage tube 2. A first slide 5 is recessed from the inner wall of the protective cover 1 facing the drainage tube 2. A second slide 6 is perpendicularly provided at the end of the first slide 5 away from the drainage tube 2. A third slide 7 is perpendicularly provided at the end of the second slide 6 away from the first slide 5. The drainage tube 2 can be inserted between the annular flange 4 and the protective cover 1. A slider 8 protrudes from the outer wall of the drainage tube 2. The slider 8 is slidably connected to the first slide 5, the second slide 6 and the third slide 7. A spring 9 is sleeved on the annular flange 4. One end of the spring 9 is fixedly connected to the annular step 3, and the other end of the spring 9 abuts against the end face of the drainage tube 2.

[0017] Furthermore, the annular flange 4 is coaxially arranged with the protective cover 1 and the drainage tube 2.

[0018] Furthermore, at least one pair of first slide rails 5 are provided, and at least one pair of first slide rails 5 are symmetrically arranged.

[0019] Furthermore, the length of the third slide 7 is less than the length of the first slide 5, and the end of the third slide 7 that is not connected to the second slide 6 is set towards the drainage pipe 2.

[0020] Furthermore, a sealing ring 10 is clamped between the inner wall of the drainage tube 2 and the outer wall of the annular step 3.

[0021] In this technical solution, after the drainage tube is inserted, the slider slides along the first slide to the bottom. The drainage tube is rotated to make the slider slide along the second slide. When it slides to the third slide, the slider is pushed into the third flow channel by the elastic force, thereby realizing assembly. The whole assembly and disassembly are convenient and production efficiency is improved.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cryogenic LNG level gauge protection device, comprising a protective cover and a drain pipe, characterized in that: The inner wall of the protective cover facing the drainage tube has a protruding annular step, and the end face of the annular step facing the drainage tube has a protruding annular flange. The inner wall of the protective cover facing the drainage tube has a recessed first slide rail. The end of the first slide rail opposite to the drainage tube has a second slide rail perpendicularly, and the end of the second slide rail opposite to the first slide rail has a third slide rail perpendicularly. The drainage tube can be inserted between the annular flange and the protective cover. The outer wall of the drainage tube has a protruding slider, and the slider is slidably connected to the first slide rail, the second slide rail and the third slide rail. A spring is sleeved on the annular flange. One end of the spring is fixedly connected to the annular step, and the other end of the spring abuts against the end face of the drainage tube.

2. The cryogenic LNG level gauge protection device according to claim 1, characterized in that: The annular flange is coaxially arranged with the protective cover and the drainage tube.

3. The cryogenic LNG level gauge protection device according to claim 1, characterized in that: The first slide rail is provided in at least one pair, and the first slide rail is provided in at least one pair symmetrically.

4. The cryogenic LNG level gauge protection device according to claim 1, characterized in that: The length of the third slide is less than the length of the first slide, and the end of the third slide that is not connected to the second slide is set towards the drainage pipe.

5. The cryogenic LNG level gauge protection device according to claim 1, characterized in that: A sealing ring is clamped between the inner wall of the drainage tube and the outer wall of the annular step.

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