Natural gas terminal filter

Abstract

The utility model relates to a natural gas terminal filter. The natural gas terminal filter comprises a shell, a filtering piece and a sealing piece, the shell is internally provided with a closed space, and the inner side wall of the shell is provided with a mounting base which is arranged in a surrounding manner; the filter part is accommodated in the closed space; the filter part comprises an opening part, the opening part extends outwards in the radial direction of the cross section of the filter part to form an extension part, and the extension part and the mounting base abut against each other and are in sealing fit; the sealing piece is fixed between the extending part of the filtering piece and the mounting base, and the sealing piece is an elastic piece; according to the utility model, the sealing mode is changed from linear contact sealing to end face contact and is sealed through the sealing piece, so that the gas tightness is better, and unfiltered natural gas is prevented from being mixed into a user side. The sealing ring is better in thermal deformation resistance and abrasion resistance, long in service life and capable of effectively solving the problem of sealing failure and improving the use safety of a user side.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a natural gas terminal filter. Background Art

[0002] Natural gas refers to a type of combustible gas that exists in nature. It is a fossil fuel, including gases formed by various natural processes in the atmosphere, hydrosphere and lithosphere. Natural gas is prone to introduce impurities such as sulfides, silt, rocks, heavy hydrocarbons, etc. during the extraction process, and is also prone to introduce impurities such as moisture, grease and dust during transportation. Unpurified and filtered natural gas directly entering the user end will cause pipeline blockage and other faults, threatening the safety of users and posing a major hidden danger. The terminal filter filters out solid, liquid and gaseous impurities in natural gas at the transportation terminal, but the sealing effect reliability of existing terminal filters is low. After long-term use, the shell base and the filter are severely deformed, which can easily cause sealing failure. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the technical difficulties of the prior art that the sealing method is line contact, the ability to resist thermal deformation is poor and the sealing failure is easy, and to provide a natural gas terminal filter to change the sealing method and improve the sealing performance.

[0004] In order to solve the above technical problems, the utility model provides a natural gas terminal filter, which comprises:

[0005] A housing, wherein a closed space is formed in the housing, and an inner side wall of the housing has a surrounding mounting base;

[0006] A filter element, the filter element is accommodated in the closed space; the filter element comprises an opening portion, the opening portion extends outwardly along the radial direction of the cross section of the filter element to form an extension portion, the extension portion abuts against the mounting base to form a sealing fit;

[0007] A sealing member is fixed between the extension portion of the filter element and the mounting base, and the sealing member is configured as an elastic member.

[0008] In one embodiment of the utility model, the shell is also provided with an air inlet and an air outlet; the interior of the filter element is connected to the air inlet to form a first space; the outer wall of the filter element, the internal side wall of the shell and the mounting base form a second space, and the second space is connected to the air outlet.

[0009] In one embodiment of the present invention, the mounting base extends along a radial direction of a cross section of the shell, and the mounting base is arranged parallel to and opposite to the extension portion.

[0010] In one embodiment of the present invention, a receiving groove is provided on a surface of the extension portion facing the mounting base, and the sealing member is located in the receiving groove and is interference fit therewith.

[0011] In one embodiment of the present invention, the accommodating groove is configured as a rectangular groove.

[0012] In one embodiment of the present invention, a free end of the mounting base in the extending direction away from the inner side wall of the shell has an avoidance gap with the outer wall of the filter element.

[0013] In one embodiment of the utility model, a fastener is also included, which includes a threaded fastening bolt and a barrel, one end of the fastening bolt is fixed to the bottom of the shell, and the other end is passed through the filter element; the barrel is located in the filter element and abuts against the bottom wall of the filter element.

[0014] In an embodiment of the present invention, the material of the sealing element is set to be perfluororubber.

[0015] In one embodiment of the utility model, the side wall of the filter element is provided with air filter holes, and the air filter holes are arranged in an array; the inner wall of the filter element is also provided with a filter layer.

[0016] In one embodiment of the present invention, the filtering accuracy of the filter layer is 300 meshes.

[0017] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0018] The natural gas terminal filter of the utility model changes the sealing mode from line contact sealing to end face contact and seals through a sealing member, which has better air tightness and can prevent unfiltered natural gas from mixing into the user end. At the same time, the natural gas terminal filter of the utility model has better ability to resist thermal deformation and wear, has a long service life, can effectively overcome the problem of sealing failure, and improve the safety of use of the user end. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0020] Figure 1 It is a structural schematic diagram of a natural gas terminal filter in the prior art;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3This is a schematic diagram of the structure of a natural gas terminal filter in a preferred embodiment of the utility model;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle.

[0024] Explanation of the reference numerals in the specification: 1. Shell; 11. Air inlet; 12. Air outlet; 2. Mounting base; 21. Avoidance gap; 3. Filter element; 31. Opening portion; 32. Extension portion; 3201. Receiving groove; 4. Sealing element; 5. Fastener; 51. Fastening bolt; 52. Cylinder; 61. First space; 62. Second space; 7. Cover body; 8. Filter basket. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] Example

[0027] Reference Figure 3 and Figure 4 As shown, the utility model provides a natural gas terminal filter, which includes a shell 1, a filter element 3 and a seal 4. The seal 4 is used to achieve sealing between the filter element 3 and the shell 1, thereby preventing unpurified and unfiltered natural gas from entering the user terminal and causing safety accidents, thereby improving the safety of natural gas use.

[0028] Specifically, refer to Figure 3 As shown, the natural gas terminal filter also includes a cover body 7, which cooperates with the shell 1 to form a closed space inside the shell 1; the side wall of the shell 1 is also provided with an air inlet 11 and an air outlet 12, and the filter element 3 is accommodated in the closed space; the natural gas enters the closed space through the air inlet 11, is filtered by the filter element 3, and is output from the air outlet 12 for use.

[0029] Further, refer to Figure 3 and Figure 4 As shown, the inner side wall of the shell 1 has a surrounding mounting base 2; the filter includes an opening portion 31, the opening portion 31 extends outward to form an extension portion 32, the extension portion 32 abuts against the mounting base 2 and forms a sealing fit through the seal 4.

[0030] Further, after the extension portion 32 of the filter element 3 is sealed with the mounting base 2, the closed space is divided into two, wherein the space inside the filter element 3 is connected with the space on one side of the mounting base 2 to form a first space 61, the first space 61 is formed by the cover body 7, the inner side wall of the shell 1, the mounting base 2 and the inner wall of the filter element 3, and the first space 61 is connected to the air inlet 11. The outer wall of the filter element 3, the inner side wall of the shell 1 and the mounting base 2 form a second space 62, and the second space 62 is connected to the air outlet 12. Preferably, the mounting base 2 is located in the middle of the inner side wall of the shell 1 along the axial direction, and is used to separate the first space 61 and the second space 62. The free end of the mounting base 2 in the extension direction away from the inner side wall of the shell 1 has an avoidance gap 21 with the outer wall of the filter element 3, which is convenient for the installation of the filter element 3.

[0031] Next, in a preferred embodiment of the utility model, the mounting base 2 extends along the radial direction of the cross section of the shell 1, and the extension portion 32 extends along the radial direction of the cross section of the filter element 3; the filter element 3 is coaxially nested with the shell 1, the mounting base 2 is parallel to and opposite to the extension portion 32, and the seal 4 is fixed between the mounting base 2 and the extension.

[0032] Next, a receiving groove 3201 is provided on one side surface of the extension portion 32 facing the mounting base 2, and the seal 4 is located in the receiving groove 3201 and has an interference fit therewith; the seal 4 is configured as an elastic member, preferably, the receiving groove 3201 is configured as a rectangular groove, and the seal 4 is configured as a sealing ring made of perfluororubber material.

[0033] It should be noted that, refer to Figure 1 As shown, in some existing natural gas filters, the opening of the filter basket 8 is set as an arc surface, and the filter basket 8 is mounted on the mounting base 2 by changing the cross-sectional radius of the opening, and is limited by the mounting base 2 to prevent slipping. However, in this type of filter, refer to Figure 2 As shown, the filter basket 8 and the end of the mounting base 2 are line contact seals. After working for a long time in a high temperature environment, on the one hand, the filter basket 8 and the mounting base 2 will be thermally deformed, and the line contact area will deform to produce gaps, and natural gas containing impurities will enter the user end. On the other hand, after long-term use, the line contact area will be severely worn, affecting the service life of the filter. In the preferred embodiment of the utility model, the sealing effect is achieved by installing the seal 4 and pressing it to deform it, which is better than the line contact sealing effect, and the natural gas is not easy to leak, thereby improving the user's safety performance.

[0034] Specifically, refer to Figure 3As shown, the natural gas terminal filter also includes a fastener 5, which includes a threaded fastening bolt 51 and a barrel 52, one end of the fastening bolt 51 is fixed to the bottom of the housing 1, and the other end is inserted into the filter element 3; the barrel 52 is located in the filter element 3 and abuts against the bottom wall of the filter element 3. The fastener 5 presses the filter element 3, so that the gap between the filter element 3 and the housing 1 in the axial direction is reduced, which facilitates the compression of the seal 4 to deform it.

[0035] Specifically, the side wall of the filter element 3 is also provided with air filter holes (not shown in the figure), and the air filter holes are arranged in an array; the inner wall of the filter element 3 is also provided with a filter layer. In order to meet the needs of end users and adapt to the gas use environment, the filtration accuracy of the filter layer is 300 mesh and the working temperature is 200°C.

[0036] The working principle of a natural gas terminal filter described in the utility model is as follows:

[0037] The filter element 3 is installed through the avoidance gap 21 formed by the mounting base 2, and the extension portion 32 abuts against the mounting base 2; the cylinder 52 is rotated to press the filter element 3 along the installation direction of the fastening bolt 51, so that the seal 4 between the extension portion 32 and the mounting base 2 is deformed to fill the gap between the two, thereby achieving a sealing effect.

[0038] The raw natural gas that has not been purified and filtered enters the first space 61 through the air inlet 11, and enters the interior of the filter element 3 through the opening 31, and impurities are filtered out through the filter layer; the natural gas obtained after filtration passes through the filter layer and enters the second space 62 through the filter holes, and enters the user end through the air outlet 12 of the second space 62 for use.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A natural gas terminal filter, characterized in that: include, A housing, wherein a closed space is formed in the housing, and an inner side wall of the housing has a surrounding mounting base; A filter element, the filter element is accommodated in the closed space; the filter element comprises an opening portion, the opening portion extends outwardly along the radial direction of the cross section of the filter element to form an extension portion, the extension portion abuts against the mounting base to form a sealing fit; A sealing member is fixed between the extension portion of the filter element and the mounting base, and the sealing member is configured as an elastic member.

2. The natural gas terminal filter according to claim 1, characterized in that: The shell is also provided with an air inlet and an air outlet; the interior of the filter element is connected to the air inlet to form a first space; the outer wall of the filter element, the inner side wall of the shell and the mounting base form a second space, and the second space is connected to the air outlet.

3. The natural gas terminal filter according to claim 1, characterized in that: The mounting base extends along the radial direction of the cross section of the shell, and the mounting base is arranged parallel to and opposite to the extending portion.

4. The natural gas terminal filter according to claim 3, characterized in that: A receiving groove is arranged on the surface of the extension portion facing the mounting base, and the sealing member is located in the receiving groove and is interference-fitted with the receiving groove.

5. The natural gas terminal filter according to claim 4, characterized in that: The containing groove is configured as a rectangular groove.

6. The natural gas terminal filter according to claim 3, characterized in that: A free end of the mounting base in an extending direction away from the inner side wall of the housing has an avoidance gap with the outer wall of the filter element.

7. The natural gas terminal filter according to claim 1, characterized in that: It also includes a fastener, which includes a threaded fastening bolt and a barrel, one end of the fastening bolt is fixed to the bottom of the shell, and the other end is inserted into the filter element; the barrel is located in the filter element and abuts against the bottom wall of the filter element.

8. The natural gas terminal filter according to claim 1, characterized in that: The material of the sealing element is set to be perfluororubber.

9. The natural gas terminal filter according to claim 1, characterized in that: The side wall of the filter element is provided with air filter holes, and the air filter holes are arranged in an array; the inner wall of the filter element is also provided with a filter layer.

10. The natural gas terminal filter according to claim 9, characterized in that: The filtering accuracy of the filtering layer is 300 meshes.

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