Low-temperature-resistant safety valve

Abstract

The utility model discloses a low temperature resistant safety valve which is applied to the technical field of low temperature safety valves, a filter screen is moved to enable an installation block to be clamped into an installation groove, the filter screen is fixed in a first flange plate through a positioning mechanism, and the filter screen filters impurities in liquid in a pipeline. And through clamping matching of the limiting groove and the limiting block, threaded holes in the first flange plate and the second flange plate can be aligned, and therefore a bolt can be conveniently screwed in for fixation. After the first flange plate is attached to the second flange plate, the sealing ring is clamped into the sealing groove, and therefore the sealing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-temperature safety valves, in particular to a low-temperature resistant safety valve. Background Art

[0002] Cryogenic safety valves are suitable for use in equipment and pipelines handling cryogenic media such as air, ammonia, and petroleum gas, as well as equipment and pipelines handling corrosive gases or liquids, as overpressure protection devices. When the pressure within the equipment or pipeline exceeds the allowable value, the valve automatically opens and fully discharges the gas. When the pressure drops to the specified value, the valve automatically closes, ensuring safe operation of the equipment and pipeline.

[0003] At present, the Chinese utility model with the announcement number CN219975596U discloses a low-temperature valve sealing structure, which relates to the field of low-temperature valve technology. The valve body lacks a structure that can filter impurities, and the impurities carried in the pipeline liquid can easily cause blockage inside the valve body, which will affect the flow of the valve body and the liquid. Therefore, there are certain usage defects. Utility Model Content

[0004] The utility model aims at a low-temperature resistant safety valve, which has the advantage of facilitating the filtering of impurities in the liquid and avoiding blockage inside the valve body.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a low-temperature resistant safety valve, comprising a valve body, a pipeline is provided on one side of the valve body, a first flange is provided on the other side of the valve body, a second flange is provided at one end of the pipeline, a filter is provided on the inner wall of the first flange, an installation groove is provided on the inner wall of the first flange, a mounting block is fixedly connected to one side of the filter, and a positioning mechanism is provided on the inner wall of the mounting block.

[0006] Using this technical solution, the filter is moved so that the mounting block snaps into the mounting groove. The positioning mechanism secures the filter within the first flange, filtering impurities from the liquid within the pipeline and preventing clogging within the valve body. The retaining groove and the retaining block engage, aligning the threaded holes on the first and second flanges, facilitating bolt insertion and securing. Once the first and second flanges are in contact, the sealing ring snaps into the sealing groove, achieving a sealing effect.

[0007] The present invention is further configured as follows: the positioning mechanism includes an arc-shaped slot provided on the inner wall of the mounting block, the inner wall of the arc-shaped slot is clamped with an arc-shaped clamping block, and the arc-shaped clamping block is slidably connected to the inner wall of the first flange.

[0008] Adopting the above technical solution: it is convenient to fix the filter.

[0009] The present invention is further configured such that the positioning mechanism further includes a spring fixed to one side of the arc-shaped clamping block, and one end of the spring is fixedly connected to the inner wall of the first flange.

[0010] Adopting the above technical solution, the arc-shaped clamping block can be automatically reset.

[0011] The present invention is further configured such that a limiting block is provided on one side of the arc-shaped clamping block, the number of the limiting blocks is two, and the two limiting blocks are symmetrically arranged.

[0012] The above technical solution can ensure that the arc-shaped clamping block is stable when moving.

[0013] The present invention is further configured such that an inner wall of the first flange is provided with a limiting groove used in conjunction with a limiting block.

[0014] The above technical solution is adopted to prevent the arc-shaped clamping block from separating from the first flange.

[0015] The present invention is further configured such that a sealing groove is provided on the inner wall of the first flange, and a sealing ring is fixedly connected to one side of the second flange.

[0016] The above technical solution is adopted to ensure that the first flange and the second flange have a sealing effect.

[0017] The present invention is further configured such that a limiting groove is provided on an inner wall of the first flange, and a limiting block is fixedly connected to one side of the second flange.

[0018] The present invention is further configured such that the number of the limiting blocks is four, and the limiting blocks are distributed and fixed on one side of the second flange.

[0019] Adopting the above technical solution: it is convenient to align the first flange and the second flange.

[0020] In summary, the present invention has the following beneficial effects:

[0021] 1: Move the filter so that the mounting block is stuck in the mounting groove. When the mounting block enters the mounting groove, it will squeeze the arc-shaped block, causing the arc-shaped block to move toward the inner cavity of the first flange. At this time, the spring is in a compressed state. When the mounting block is completely stuck in the mounting groove, the spring's rebound force can automatically reset the arc-shaped block and stick it into the arc-shaped groove, thereby completing the fixation of the filter. Impurities in the liquid in the pipeline are filtered by the filter to avoid blockage inside the valve body.

[0022] 2: The clamping fit between the limiting groove and the limiting block allows the threaded holes on the first and second flanges to be aligned, making it easier to screw in the bolts. When the first and second flanges are in contact, the sealing ring snaps into the sealing groove, achieving a sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a structural diagram of the limiting block and limiting groove of the utility model;

[0025] Figure 3 It is a structural diagram of the filter screen and the sealing groove of the utility model;

[0026] Figure 4 This utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0027] Figure numerals: 1, valve body; 2, pipeline; 3, first flange; 4, second flange; 5, filter; 6, mounting groove; 7, mounting block; 8, arc-shaped slot; 9, arc-shaped block; 10, spring; 11, limit block; 12, sealing groove; 13, sealing ring; 14, limiting groove; 15, limiting block. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] Example 1:

[0030] refer to Figure 1 、 Figure 2 , pictures and Figure 4 A low-temperature resistant safety valve includes a valve body 1, a pipe 2 is provided on one side of the valve body 1, a first flange 3 is provided on the other side of the valve body 1, a second flange 4 is provided at one end of the pipe 2, a filter screen 5 is provided on the inner wall of the first flange 3, an installation groove 6 is provided on the inner wall of the first flange 3, a mounting block 7 is fixedly connected to one side of the filter screen 5, and a positioning mechanism is provided on the inner wall of the mounting block 7.

[0031] Threaded holes are formed in the circumference of the first flange 3 and the second flange 4 .

[0032] refer to Figure 3 and Figure 4 The positioning mechanism includes an arc-shaped slot 8 opened on the inner wall of the mounting block 7, the inner wall of the arc-shaped slot 8 is clamped with an arc-shaped block 9, and the arc-shaped block 9 is slidably connected to the inner wall of the first flange 3.

[0033] refer to Figure 4 The positioning mechanism also includes a spring 10 fixed to one side of the arc-shaped block 9 , and one end of the spring 10 is fixedly connected to the inner wall of the first flange 3 .

[0034] refer to Figure 4 A limiting block 11 is set on one side of the arc-shaped block 9. The number of the limiting blocks 11 is two, and the two limiting blocks 11 are symmetrically arranged.

[0035] refer to Figure 4 The inner wall of the first flange 3 is provided with a limiting groove for use with the limiting block 11.

[0036] Brief description of the usage process: Move the filter screen 5 to make the mounting block 7 fit into the mounting groove 6. When the mounting block 7 enters the mounting groove 6, it will squeeze the arc-shaped block 9, so that the arc-shaped block 9 drives the limit block 11 to move toward the inner cavity of the first flange 3. At this time, the spring 10 is in a compressed state. When the mounting block 7 is completely inserted into the mounting groove 6, the rebound force of the spring 10 can automatically reset the arc-shaped block 9 and fit into the arc-shaped groove 8, thereby completing the fixation of the filter screen 5. The valve body 1 can be connected to the pipeline 2 through the first flange 3 and the second flange 4. The impurities in the liquid in the pipeline 2 can be filtered through the filter screen 5 to avoid blockage inside the valve body 1.

[0037] When the filter screen 5 needs to be cleaned, the valve body 1 and the pipe 2 are disassembled, and then the filter screen 5 is pulled to separate the arc-shaped block 9 from the arc-shaped slot 8, which is convenient and quick.

[0038] Example 2:

[0039] refer to Figure 1 and Figure 2 A low-temperature resistant safety valve includes a valve body 1, a pipe 2 is provided on one side of the valve body 1, a first flange 3 is provided on the other side of the valve body 1, and a second flange 4 is provided at one end of the pipe 2.

[0040] refer to Figure 2 and Figure 3 A sealing groove 12 is provided on the inner wall of the first flange 3 , and a sealing ring 13 is fixedly connected to one side of the second flange 4 .

[0041] refer to Figure 1 、 Figure 2 and Figure 3 A limiting groove 14 is provided on the inner wall of the first flange 3 , and a limiting block 15 is fixedly connected to one side of the second flange 4 .

[0042] refer to Figure 2 and Figure 3 There are four limiting blocks 15 , which are distributed and fixed on one side of the second flange 4 .

[0043] Operational Overview: Move valve body 1 so that limiting groove 14 on the inner wall of first flange 3 engages limiting block 15 on one side of second flange 4. Limiting groove 14 and limiting block 15 align the threaded holes on first and second flanges 3 and 4, facilitating bolt insertion and securing. Once first and second flanges 3 and 4 are in contact, sealing ring 13 engages sealing groove 12, achieving a sealed seal.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A low-temperature resistant safety valve, comprising a valve body (1), characterized in that: A pipe (2) is provided on one side of the valve body (1), a first flange (3) is provided on the other side of the valve body (1), a second flange (4) is provided at one end of the pipe (2), a filter (5) is provided on the inner wall of the first flange (3), a mounting groove (6) is provided on the inner wall of the first flange (3), a mounting block (7) is fixedly connected to one side of the filter (5), and a positioning mechanism is provided on the inner wall of the mounting block (7).

2. A low-temperature resistant safety valve according to claim 1, characterized in that: The positioning mechanism comprises an arc-shaped slot (8) formed on the inner wall of the mounting block (7), an arc-shaped block (9) being clamped on the inner wall of the arc-shaped slot (8), and the arc-shaped block (9) being slidably connected to the inner wall of the first flange (3).

3. A low-temperature resistant safety valve according to claim 2, characterized in that: The positioning mechanism further comprises a spring (10) fixed to one side of the arc-shaped clamping block (9), and one end of the spring (10) is fixedly connected to the inner wall of the first flange (3).

4. A low-temperature resistant safety valve according to claim 2, characterized in that: A limiting block (11) is provided on one side of the arc-shaped clamping block (9), and the number of the limiting blocks (11) is two, and the two limiting blocks (11) are symmetrically arranged.

5. The low-temperature resistant safety valve according to claim 4, characterized in that: The inner wall of the first flange (3) is provided with a limiting groove for use with the limiting block (11).

6. The low-temperature resistant safety valve according to claim 1, characterized in that: A sealing groove (12) is provided on the inner wall of the first flange (3), and a sealing ring (13) is fixedly connected to one side of the second flange (4).

7. The low-temperature resistant safety valve according to claim 1, characterized in that: A limiting groove (14) is provided on the inner wall of the first flange (3), and a limiting block (15) is fixedly connected to one side of the second flange (4).

8. The low-temperature resistant safety valve according to claim 7, characterized in that: The number of the limiting blocks (15) is four, and they are distributed and fixed on one side of the second flange (4).

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