A natural gas molecular sieve dryer

Abstract

The utility model discloses a natural gas molecular sieve dryer relates to natural gas drying equipment technical field, including installation component, gas pipeline, gas pipeline and a pair of molecular sieve dryer main part, a pair of molecular sieve dryer main part respectively detachably set up on installation component, and the molecular sieve dryer main part bottom is equipped with the gas inlet connection pipe, and the top is equipped with the gas outlet connection pipe, and the both ends of gas pipeline are detachably connected with the gas inlet connection pipe of a pair of molecular sieve dryer main part bottom respectively, and the both ends of gas pipeline are equipped with gas control valve respectively, and the both ends of gas pipeline are detachably connected with the gas outlet connection pipe of a pair of molecular sieve dryer main part top respectively, and the both ends of gas pipeline are equipped with gas control valve respectively, solved the current natural gas molecular sieve dryer because of lacking spare drying passage, lead to the replacement molecular sieve when needing to close down entire drying system, and further cause natural gas exploitation interruption, cause yield loss and increase equipment loss problem.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas drying equipment, specifically to a natural gas molecular sieve dryer. Background Technology

[0002] During natural gas extraction, the natural gas produced at the wellhead is often accompanied by a large amount of formation water. This water, when mixed with acidic gases such as hydrogen sulfide and carbon dioxide in the natural gas, accelerates the corrosion of wellhead equipment under high-pressure extraction conditions, leading to seal failure, increased leakage risk, and in severe cases, wellhead safety accidents. Simultaneously, if the extraction area is in a low-temperature environment, the water in the natural gas easily condenses into ice or forms hydrates, clogging pipelines and throttle valves, causing a sharp drop in production or even operational interruption. Therefore, drying the natural gas during the extraction process is a necessary step to ensure safe and continuous operation.

[0003] Currently, molecular sieve dryers are commonly used at mining sites to dehydrate natural gas. However, existing dryers have significant design flaws: most are single drying tower structures, and the dryer body and inlet / outlet gas pipes are mostly fixedly welded, lacking convenient disassembly designs and backup drying pathways. Because the molecular sieve adsorbent operates under high load during mining, it needs to be replaced periodically to ensure drying effectiveness. Replacement requires shutting down the entire drying system, closing the wellhead main gas intake valve, and depressurizing before disassembling the pipes and removing the dryer body, a process that is time-consuming.

[0004] This shutdown-to-replacement mode not only interrupts natural gas extraction, causing direct production losses, but also increases wear and tear on other components due to frequent start-ups and shutdowns, shortening equipment lifespan. Furthermore, extraction sites are mostly in outdoor environments, and equipment dismantling and replacement during shutdowns are easily affected by weather, further prolonging the downtime. This makes it difficult to meet the demands of modern natural gas extraction for efficient and continuous operation, necessitating a dryer capable of replacing molecular sieves without shutting down the system. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes a natural gas molecular sieve dryer, which solves the problem that current natural gas molecular sieve dryers lack backup drying channels, resulting in the need to shut down the entire drying system when replacing molecular sieves, which in turn leads to interruption of natural gas extraction, production loss, and increased equipment wear.

[0006] The technical solution of this utility model is:

[0007] A natural gas molecular sieve dryer includes an installation assembly, an inlet pipe, an outlet pipe, and a pair of molecular sieve dryer bodies. The pair of molecular sieve dryer bodies are respectively mounted on the installation assembly and detachably connected to it. Each molecular sieve dryer body has an inlet connecting pipe at its bottom and an outlet connecting pipe at its top. Both ends of the inlet pipe are detachably connected to the inlet connecting pipes at the bottom of the pair of molecular sieve dryer bodies. Each end of the inlet pipe has an inlet control valve for controlling the entry of natural gas into only one of the molecular sieve dryer bodies. Both ends of the outlet pipe are detachably connected to the outlet connecting pipes at the top of the pair of molecular sieve dryer bodies. Each end of the outlet pipe has an outlet control valve for controlling the output of the dried natural gas from the molecular sieve dryer body.

[0008] Preferably, the air intake pipe includes an air intake main pipe, an air intake branch pipe, and a pair of air intake branch pipes. One end of the air intake main pipe is fixedly connected to and communicates with the middle of the air intake branch pipe. One end of each pair of air intake branch pipes is fixedly connected to and communicates with both ends of the air intake branch pipe. The other ends of each pair of air intake branch pipes are respectively connected to the air intake connection pipe flanges at the bottom of the molecular sieve dryer body. A pair of air intake control valves are respectively installed at both ends of the air intake branch pipe and located between the air intake branch pipe and the air intake main pipe.

[0009] Preferably, the gas outlet pipeline includes a main gas outlet pipe, a gas outlet branch pipe, and a pair of gas outlet branch pipes. One end of the main gas outlet pipe is fixedly connected to and communicates with the middle of the gas outlet branch pipe. One end of each pair of gas outlet branch pipes is fixedly connected to and communicates with both ends of the gas outlet branch pipe. The other ends of each pair of gas outlet branch pipes are respectively connected to the gas outlet connection pipe flanges on the top of a pair of molecular sieve dryer bodies. A pair of gas outlet control valves are respectively installed at both ends of the gas outlet branch pipe and located between the gas outlet branch pipes and the main gas outlet pipe.

[0010] Preferably, the mounting assembly includes a mounting base and a pair of mounting structures. The pair of mounting structures are respectively mounted on the mounting base and detachably connected to the mounting base by bolts. The pair of molecular sieve dryer bodies are respectively mounted on the pair of mounting structures and detachably connected to the mounting structures.

[0011] Preferably, the installation structure includes an installation bracket, a connecting slider, and a clamping structure. The bottom of the installation bracket is detachably connected to the top of the installation base by bolts. The installation bracket is provided with a limiting sliding groove. The connecting slider is located on one side of the installation bracket and is slidably connected to the installation bracket. The connecting slider and the limiting sliding groove are correspondingly arranged. The connecting slider and the limiting sliding groove are connected by a locking screw. One end of the locking screw passes through the connecting slider and the limiting sliding groove and is locked onto the installation bracket by a locking nut. The locking nut and the end of the locking screw passing through the connecting slider and the limiting sliding groove are threadedly connected. The locking screw is rotatably connected to the connecting slider and slidably connected to the limiting sliding groove. The clamping structure is fixedly located at the lower end of the connecting slider and is used to clamp the molecular sieve dryer body.

[0012] Preferably, the clamping structure includes a sliding rail, a bidirectional reverse threaded screw, a pair of sliding connecting arms, and a pair of arc-shaped clamping arms. One side of the sliding rail is fixedly connected to the lower end of the connecting slider. The sliding rail is provided with a limiting installation groove. The bidirectional reverse threaded screw is set in the limiting installation groove. Both ends of the bidirectional reverse threaded screw pass through both ends of the sliding rail and are rotatably connected to the sliding rail. One end of the pair of sliding connecting arms is set in the limiting installation groove and is slidably connected to the sliding rail. One end of the pair of sliding connecting arms located in the limiting installation groove is respectively sleeved on both ends of the bidirectional reverse threaded screw and threadedly connected to the bidirectional reverse threaded screw. One end of the pair of arc-shaped clamping arms is fixedly connected to the other end of the pair of sliding connecting arms.

[0013] Preferably, a manual knob is fixedly provided at one end of the bidirectional reverse thread screw. The bidirectional reverse thread screw is provided with a positive thread extending from the middle of the bidirectional reverse thread screw to one end and a reverse thread extending from the middle of the bidirectional reverse thread screw to the other end. One end of one sliding connecting arm is threadedly connected to the end of the bidirectional reverse thread screw with the positive thread, and the other sliding connecting arm is threadedly connected to the end of the bidirectional reverse thread screw with the reverse thread.

[0014] Preferably, the molecular sieve dryer body includes an outer protective shell, a molecular sieve body, an upper end cover, and a lower end cover. The outer protective shell has an installation cavity that extends through both ends of the outer protective shell. The molecular sieve body is disposed in the installation cavity and is slidably connected to the installation cavity. The upper end cover and the lower end cover are respectively fitted onto both ends of the outer protective shell and are threadedly connected to the outer protective shell. A first insertion ring is fixedly provided on the upper end cover. One end of the first insertion ring is inserted into the installation cavity and abuts against one end of the molecular sieve body. A second insertion ring is fixedly provided on the lower end cover. One end of the second insertion ring is inserted into the installation cavity and abuts against the other end of the molecular sieve body. An air inlet connection pipe is fixedly provided at the bottom of the lower end cover and communicates with the installation cavity. An air outlet connection pipe is fixedly provided at the top of the upper end cover and communicates with the installation cavity.

[0015] Preferably, the molecular sieve body includes a housing and a pair of sealing caps. The housing has a housing cavity for filling the molecular sieve. The pair of sealing caps are respectively disposed on both sides of the housing. One end of the sealing cap is inserted into the housing cavity and threadedly connected to the housing. The sealing cap has several through holes for natural gas to pass through. The outer side of the housing has several limiting protrusions. The inner wall of the housing cavity has limiting slots that cooperate with the limiting protrusions. The limiting protrusions are respectively inserted into the limiting slots and slidably connected to the limiting slots.

[0016] Preferably, the lower end cover is provided with a mounting ring, which is fixedly connected to the lower end cover. There is a receiving groove between the mounting ring, the lower end cover, and the second insertion ring. A spring is provided in the receiving groove, with one end of the spring abutting against the lower end cover and the other end abutting against the closed cover located at the bottom of the receiving housing.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes an installation assembly to mount a pair of detachable molecular sieve dryer bodies, coupled with inlet pipes equipped with inlet control valves at both ends. The inlet pipes are connected to inlet connection pipes at the bottom of the two molecular sieve dryer bodies, and outlet pipes, each equipped with an outlet control valve at both ends, are connected to outlet connection pipes at the top of the two molecular sieve dryer bodies, forming a dual-drying pathway design. During operation, by opening one inlet control valve, natural gas flows solely through the molecular sieve dryer body corresponding to that valve, thus completing the drying process. Simultaneously, opening the outlet control valve corresponding to that molecular sieve dryer body allows the dried natural gas to be output. When a molecular sieve dryer body needs to be replaced, simply closing the inlet and outlet control valves corresponding to that dryer body while simultaneously opening the inlet and outlet control valves corresponding to the other molecular sieve dryer body switches to the backup drying pathway to maintain system operation, without shutting down the entire drying system. This solves the problem that current natural gas molecular sieve dryers lack backup drying pathways, which means that the entire drying system must be shut down when replacing molecular sieves, leading to interruptions in natural gas extraction, production losses, and increased equipment wear and tear. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a natural gas molecular sieve dryer as described in an embodiment of this utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a natural gas molecular sieve dryer as described in an embodiment of this utility model. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the installation component described in the embodiments of this utility model;

[0023] Figure 4 This is a schematic diagram of the installation structure described in the embodiments of this utility model;

[0024] Figure 5This is a partial structural schematic diagram of a natural gas molecular sieve dryer as described in an embodiment of this utility model;

[0025] Figure 6 This is a partial structural schematic diagram of the molecular sieve dryer body described in an embodiment of the present invention;

[0026] Figure 7 This is a schematic cross-sectional view of the molecular sieve dryer body described in this embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Mounting components, 11-Inlet pipe, 12-Outlet pipe, 13-Molecular sieve dryer body, 14-Inlet connecting pipe, 15-Outlet connecting pipe, 16-Inlet control valve, 17-Outlet control valve, 18-Main inlet pipe, 19-Inlet branch pipe, 20-Inlet branch pipe, 21-Main outlet pipe, 22-Outlet branch pipe, 23-Outlet branch pipe, 24-Mounting base, 25-Mounting structure, 26-Mounting bracket, 27-Connecting slider, 28-Clamping structure, 29-Limiting sliding groove, 30-Locking screw, 31- - Locking nut, 32 - Sliding rail, 33 - Bidirectional reverse thread screw, 34 - Sliding connecting arm, 35 - Arc-shaped clamping arm, 36 - Limiting mounting groove, 37 - Manual knob, 38 - Outer protective shell, 39 - Molecular sieve body, 40 - Upper end cover, 41 - Lower end cover, 42 - Mounting cavity, 43 - First insertion ring, 44 - Second insertion ring, 45 - Receiving shell, 46 - Sealing cover, 47 - Receiving cavity, 48 - Through hole, 49 - Limiting protrusion, 50 - Limiting slot, 51 - Mounting ring, 52 - Receiving groove, 53 - Spring. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] Example:

[0037] like Figures 1 to 7As shown, this embodiment discloses a natural gas molecular sieve dryer, including an installation assembly 10, an inlet pipe 11, an outlet pipe 12, and a pair of molecular sieve dryer bodies 13. The pair of molecular sieve dryer bodies 13 are respectively mounted on the installation assembly 10 and are detachably connected to the installation assembly 10. The bottom of the molecular sieve dryer body 13 is provided with an inlet connecting pipe 14, and the top is provided with an outlet connecting pipe 15. Both ends of the inlet pipe 11 are detachably connected to the inlet connecting pipe 14 at the bottom of the pair of molecular sieve dryer bodies 13. Both ends of the inlet pipe 11 are provided with inlet control valves 16, which are used to control the natural gas to enter one of the molecular sieve dryer bodies 13 separately. Both ends of the outlet pipe 12 are detachably connected to the outlet connecting pipe 15 at the top of the pair of molecular sieve dryer bodies 13. Both ends of the outlet pipe 12 are provided with outlet control valves 17, which are used to control the output of the dried natural gas in the molecular sieve dryer body 13.

[0038] This utility model uses an installation component 10 to mount a pair of detachable molecular sieve dryer bodies 13, which are equipped with air inlet pipes 11 with air inlet control valves 16 at both ends. The two ends of the air inlet pipes 11 are respectively connected to the bottom air inlet connecting pipes 14 of the two molecular sieve dryer bodies 13 and the two ends of the air outlet pipes 12 with air outlet control valves 17 at both ends. The two ends of the air outlet pipes 12 are respectively connected to the top air outlet connecting pipes 15 of the two molecular sieve dryer bodies 13, forming a dual drying passage design. During operation, natural gas can be allowed to flow solely through the molecular sieve dryer body 13 corresponding to one of the inlet control valves 16 by opening it, thus completing the drying process. Simultaneously, the outlet control valve 17 corresponding to that molecular sieve dryer body 13 can be opened to output the dried natural gas. When the molecular sieve dryer body 13 needs to be replaced, simply close the inlet control valve 16 and outlet control valve 17 corresponding to that body, and simultaneously open the inlet control valve 16 and outlet control valve 17 corresponding to the other molecular sieve dryer body 13. This switches to the backup drying path to maintain system operation without shutting down the entire drying system. This solves the problem of current natural gas molecular sieve dryers lacking a backup drying path, which necessitates shutting down the entire drying system when replacing molecular sieves, leading to interruptions in natural gas extraction, production losses, and increased equipment wear.

[0039] To facilitate the control of natural gas entering the molecular sieve dryer body 13, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the air inlet pipe 11 includes an air inlet main pipe 18, an air inlet branch pipe 19, and a pair of air inlet branch pipes 20. One end of the air inlet main pipe 18 is fixedly connected to and communicates with the middle of the air inlet branch pipe 19. One end of the pair of air inlet branch pipes 20 is fixedly connected to and communicates with both ends of the air inlet branch pipe 19. The other end of the pair of air inlet branch pipes 20 is connected to the flanges of the air inlet connecting pipes 14 at the bottom of the molecular sieve dryer body 13. A pair of air inlet control valves 16 are respectively set at both ends of the air inlet branch pipe 19 and located between the air inlet branch pipes 20 and the air inlet main pipe 18.

[0040] The intake pipeline 11 consists of an intake main pipe 18, an intake branch pipe 19, and a pair of intake branch pipes 20. Natural gas flows from the intake main pipe 18 into the intake branch pipe 19 and is then distributed through the intake branch pipe 19. The intake control valve 16 is located at both ends of the intake branch pipe 19, between the intake branch pipe 20 and the intake main pipe 18, and individually controls the opening and closing of the corresponding intake branch pipe 20, thereby realizing the directional delivery of natural gas to one of the molecular sieve dryer bodies 13. Flange connections are used for easy disassembly and maintenance, and provide stronger sealing.

[0041] In order to ensure that natural gas is output separately from the molecular sieve dryer body 13 and to prevent the dried natural gas from flowing back to another molecular sieve dryer body 13, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the gas outlet pipe 12 includes a main gas outlet pipe 21, a gas outlet branch pipe 22 and a pair of gas outlet branch pipes 23. One end of the main gas outlet pipe 21 is fixedly connected to and communicates with the middle part of the gas outlet branch pipe 22. One end of the pair of gas outlet branch pipes 23 is fixedly connected to and communicates with both ends of the gas outlet branch pipe 22. The other end of the pair of gas outlet branch pipes 23 is connected to the flange of the gas outlet connecting pipe 15 at the top of the pair of molecular sieve dryer bodies 13. A pair of gas outlet control valves 17 are respectively set at both ends of the gas outlet branch pipe 22 and located between the gas outlet branch pipe 23 and the main gas outlet pipe 21.

[0042] The gas outlet pipeline 12 consists of a main gas outlet pipe 21, a gas outlet branch pipe 22, and a pair of gas outlet branch pipes 23. The dried natural gas flows from the molecular sieve dryer body 13 through the gas outlet branch pipes 23 into the gas outlet branch pipe 22, and is finally output through the main gas outlet pipe 21. The gas outlet control valve 17 is located at both ends of the gas outlet branch pipe 22, between the gas outlet branch pipes 23 and the main gas outlet pipe 21, and works in conjunction with the inlet valve to achieve single-path gas output control. This also prevents natural gas flowing from one molecular sieve dryer body 13 from flowing back into the other. The flange connection also facilitates maintenance and ensures no gas leakage after drying.

[0043] To facilitate the loading and unloading of the molecular sieve dryer body 13, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the mounting assembly 10 includes a mounting base 24 and a pair of mounting structures 25. The pair of mounting structures 25 are respectively mounted on the mounting base 24 and are detachably connected to the mounting base 24 by bolts. The pair of molecular sieve dryer bodies 13 are respectively mounted on the pair of mounting structures 25 and are detachably connected to the mounting structures 25.

[0044] The mounting structure 25 includes a mounting bracket 26, a connecting slider 27, and a clamping structure 28. The bottom of the mounting bracket 26 is detachably connected to the top of the mounting base 24 by bolts. The mounting bracket 26 is provided with a limiting sliding groove 29. The connecting slider 27 is located on one side of the mounting bracket 26 and is slidably connected to the mounting bracket 26. The connecting slider 27 and the limiting sliding groove 29 are correspondingly arranged. The connecting slider 27 and the limiting sliding groove 29 are connected by a locking screw 30. One end of the locking screw 30 passes through the connecting slider 27 and the limiting sliding groove 29 and is locked on the mounting bracket 26 by a locking nut 31. The locking nut 31 is threadedly connected to the end of the locking screw 30 that passes through the connecting slider 27 and the limiting sliding groove 29. The locking screw 30 is rotatably connected to the connecting slider 27 and slidably connected to the limiting sliding groove 29. The clamping structure 28 is fixedly located at the lower end of the connecting slider 27 and is used to clamp the molecular sieve dryer body 13.

[0045] The mounting structure 25 includes a mounting bracket 26, a connecting slider 27, and a clamping structure 28. The connecting slider 27 slides along the limiting sliding groove 29 of the mounting bracket 26 and is fixed in position by the locking screw 30 and the locking nut 31. The clamping structure 28 is fixed to the lower end of the connecting slider 27 and is used to clamp the molecular sieve dryer body 13. In use, the height of the molecular sieve dryer body 13 can be adjusted by sliding the connecting slider 27, and a stable fixation is achieved after locking. The sliding adjustment function allows the installation position of the molecular sieve dryer body 13 to flexibly adapt to pipeline connection requirements, reducing the installation accuracy requirements.

[0046] To further facilitate the loading and unloading of the molecular sieve dryer body 13, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the clamping structure 28 includes a sliding track 32, a bidirectional reverse thread screw 33, a pair of sliding connecting arms 34, and a pair of arc-shaped clamping arms 35. One side of the sliding track 32 is fixedly connected to the lower end of the connecting slider 27. The sliding track 32 is provided with a limiting installation groove 36. The bidirectional reverse thread screw 33 is set in the limiting installation groove 36. The two ends of the bidirectional reverse thread screw 33 pass through the two ends of the sliding track 32 and are rotatably connected to the sliding track 32. One end of the pair of sliding connecting arms 34 is set in the limiting installation groove 36 and is slidably connected to the sliding track 32. The ends of the pair of sliding connecting arms 34 located in the limiting installation groove 36 are respectively sleeved on the two ends of the bidirectional reverse thread screw 33 and are threadedly connected to the bidirectional reverse thread screw 33. One end of the pair of arc-shaped clamping arms 35 is fixedly connected to the other end of the pair of sliding connecting arms 34.

[0047] The bidirectional reverse thread screw 33 has a manual knob 37 fixedly installed at one end. The bidirectional reverse thread screw 33 has a positive thread extending from the middle of the bidirectional reverse thread screw 33 to one end and a reverse thread extending from the middle of the bidirectional reverse thread screw 33 to the other end. One end of one sliding connecting arm 34 is threaded to the end of the bidirectional reverse thread screw 33 with the positive thread, and the other sliding connecting arm 34 is threaded to the end of the bidirectional reverse thread screw 33 with the reverse thread.

[0048] The clamping structure 28 consists of a sliding track 32, a bidirectional reverse thread screw 33, a pair of sliding connecting arms 34, and a pair of arc-shaped clamping arms 35. In use, rotating the manual knob 37 rotates the bidirectional reverse thread screw 33. Because the threads at both ends are in opposite directions, the pair of sliding connecting arms 34 slide in opposite directions along the track, causing the arc-shaped clamping arms 35 to move closer or further away simultaneously. This achieves clamping or loosening of the molecular sieve dryer body 13, further facilitating the loading and unloading of the molecular sieve dryer body 13.

[0049] To facilitate the easy disassembly of the molecular sieve dryer body 13, this embodiment is an improvement upon the above embodiment. The difference lies in that the molecular sieve dryer body 13 includes an outer protective shell 38, a molecular sieve body 39, an upper end cap 40, and a lower end cap 41. The outer protective shell 38 has a mounting cavity 42 penetrating both ends of the outer protective shell 38. The molecular sieve body 39 is disposed within the mounting cavity 42 and slidably connected to it. The upper end cap 40 and the lower end cap 41 are respectively fitted onto both ends of the outer protective shell 38. The upper end cover 40 is threadedly connected to the outer protective shell 38. A first insertion ring 43 is fixedly provided on the upper end cover 40. One end of the first insertion ring 43 is inserted into the mounting cavity 42 and abuts against one end of the molecular sieve body 39. A second insertion ring 44 is fixedly provided on the lower end cover 41. One end of the second insertion ring 44 is inserted into the mounting cavity 42 and abuts against the other end of the molecular sieve body 39. An air inlet connection pipe 14 is fixedly provided at the bottom of the lower end cover 41 and communicates with the mounting cavity 42. An air outlet connection pipe 15 is fixedly provided at the top of the upper end cover 40 and communicates with the mounting cavity 42.

[0050] An installation cavity 42 is provided inside the outer protective shell 38, and the molecular sieve body 39 is placed inside the installation cavity 42. The upper end cover 40 and the lower end cover 41 are connected to the outer protective shell 38 by threads. The first insertion ring 43 and the second insertion ring 44 are inserted into the installation cavity 42 and abut against both ends of the molecular sieve body 39 to achieve axial fixation of the molecular sieve body 39. Natural gas enters from the inlet connection pipe 14 of the lower end cover 41, flows through the molecular sieve body 39 for drying, and is output from the outlet connection pipe 15 of the upper end cover 40. The threaded connection of the upper end cover 40 and the lower end cover 41 facilitates quick disassembly, allowing the molecular sieve body 39 to be directly removed for replacement, resulting in high maintenance efficiency. The first insertion ring 43 and the second insertion ring 44 abut against the molecular sieve body 39 to prevent it from shaking under the impact of airflow, ensuring a stable drying path and improving the drying effect. The outer protective shell 38 provides physical protection for the molecular sieve body 39, extending its service life.

[0051] As a further preferred embodiment, the outer protective housing 38 is provided with clamping grooves that mate with the arc-shaped clamping arms 35, allowing the pair of arc-shaped clamping arms 35 to be clamped within the clamping grooves. The clamping grooves facilitate clamping the outer protective housing 38 while preventing it from shifting. A flexible rubber pad is fixedly provided on the side of the arc-shaped clamping arm 35 that contacts the clamping groove. The flexible rubber pads prevent the arc-shaped clamping arms 35 from damaging the outer protective housing 38 and also facilitate better clamping of the protective housing.

[0052] To facilitate the replacement of molecular sieves, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the molecular sieve body 39 includes a housing 45 and a pair of sealing caps 46. The housing 45 is provided with a housing cavity 47 for filling molecular sieves. The pair of sealing caps 46 are respectively disposed on both sides of the housing 45. One end of the sealing cap 46 is inserted into the housing cavity 47 and is threadedly connected to the housing 45. The sealing cap 46 is provided with several through holes 48 for natural gas to pass through. Several limiting protrusions 49 are provided on the outer side of the housing 45. The inner side wall of the mounting cavity 42 is provided with limiting slots 50 that cooperate with the limiting protrusions 49. The limiting protrusions 49 are respectively inserted into the limiting slots 50 and are slidably connected to the limiting slots 50.

[0053] The housing 45 contains a cavity 47 for filling with molecular sieves, and both ends are sealed by a cap 46 with a through hole 48. A limiting protrusion 49 on the outer side of the housing 45 engages with a limiting slot 50 on the outer protective housing 38 to restrict circumferential rotation of the housing. Natural gas enters and exits through the through hole 48 of the cap 46, ensuring full contact with the molecular sieve for drying. The through hole 48 of the cap 46 is designed to ensure smooth natural gas flow while preventing leakage of the molecular sieve. The aperture of the through hole 48 must be smaller than the particle size of the molecular sieve to prevent leakage of the molecular sieve from the housing cavity 47.

[0054] To facilitate the ejection of the molecular sieve body 39 and thus its disassembly, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the lower end cover 41 is provided with an installation ring 51, which is fixedly connected to the lower end cover 41. There is a receiving groove 52 between the installation ring 51, the lower end cover 41, and the second insertion ring 44. A spring 53 is provided in the receiving groove 52. One end of the spring 53 abuts against the lower end cover 41, and the other end abuts against the closed cover 46 located at the bottom of the receiving housing 45.

[0055] The spring 53 compensates for minor displacements of the molecular sieve body 39 caused by long-term use or vibration, ensuring that it remains in tight contact with the upper and lower insertion rings and preventing loosening. Simultaneously, during disassembly, after opening the upper cover 40, the molecular sieve body 39 will pop out under the force of the spring 53, facilitating its removal.

[0056] In one embodiment, the contact surfaces of the sealing cover 46 and the receiving housing 45 are sealed by sealing gaskets; the first insertion ring 43 and the second insertion ring 44 are sealed with the sealing cover 46 by sealing gaskets; the upper end cover 40 and the lower end cover 41 are sealed with the outer protective housing 38 by sealing gaskets; and the mounting ring 51 is sealed with the sealing cover 46 by sealing gaskets. The sealing gaskets are embedded, requiring only a sealing groove on the contact end face to embed the sealing gasket within the groove. The sealing gaskets can be perfluoroether rubber gaskets from the prior art. Furthermore, the threaded connections between threaded components can be sealed by adding sealing tape during connection.

[0057] Working principle of this utility model:

[0058] This utility model uses an installation component 10 to mount a pair of detachable molecular sieve dryer bodies 13, which are equipped with air inlet pipes 11 with air inlet control valves 16 at both ends. The two ends of the air inlet pipes 11 are respectively connected to the bottom air inlet connecting pipes 14 of the two molecular sieve dryer bodies 13 and the two ends of the air outlet pipes 12 with air outlet control valves 17 at both ends. The two ends of the air outlet pipes 12 are respectively connected to the top air outlet connecting pipes 15 of the two molecular sieve dryer bodies 13, forming a dual drying passage design. During operation, natural gas can be allowed to flow solely through the molecular sieve dryer body 13 corresponding to one of the inlet control valves 16 by opening one of them, thereby completing the drying process. At the same time, the outlet control valve 17 corresponding to the molecular sieve dryer body 13 can be opened to output the dried natural gas. When the molecular sieve dryer body 13 needs to be replaced, simply close the inlet control valve 16 and outlet control valve 17 corresponding to that molecular sieve dryer body 13, and simultaneously open the inlet control valve 16 and outlet control valve 17 corresponding to the other molecular sieve dryer body 13 to switch to the backup drying path and maintain system operation without shutting down the entire drying system.

[0059] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A natural gas molecular sieve dryer characterized by, The device includes an installation assembly (10), an inlet pipe (11), an outlet pipe (12), and a pair of molecular sieve dryer bodies (13). The pair of molecular sieve dryer bodies (13) are respectively mounted on the installation assembly (10) and are detachably connected to the installation assembly (10). The bottom of the molecular sieve dryer body (13) is provided with an inlet connecting pipe (14), and the top is provided with an outlet connecting pipe (15). Both ends of the inlet pipe (11) are detachably connected to the inlet connecting pipes (14) at the bottom of the pair of molecular sieve dryer bodies (13). Next, the inlet pipe (11) is provided with an inlet control valve (16) at both ends. The inlet control valve (16) is used to control the natural gas to enter one of the molecular sieve dryer bodies (13) separately. The outlet pipe (12) is detachably connected to the outlet connection pipe (15) at the top of a pair of molecular sieve dryer bodies (13) at both ends. The outlet pipe (12) is provided with an outlet control valve (17) at both ends. The outlet control valve (17) is used to control the output of the dried natural gas in the molecular sieve dryer body (13).

2. A natural gas molecular sieve dryer according to claim 1 wherein, The intake pipe (11) includes an intake main pipe (18), an intake branch pipe (19), and a pair of intake branch pipes (20). One end of the intake main pipe (18) is fixedly connected to the middle of the intake branch pipe (19) and communicates with it. One end of the pair of intake branch pipes (20) is fixedly connected to both ends of the intake branch pipe (19) and communicates with it. The other end of the pair of intake branch pipes (20) is connected to the flange of the intake connection pipe (14) at the bottom of the molecular sieve dryer body (13). A pair of intake control valves (16) are respectively set at both ends of the intake branch pipe (19) and located between the intake branch pipe (20) and the intake main pipe (18).

3. A natural gas molecular sieve dryer according to claim 2, wherein, The outlet pipe (12) includes an outlet main pipe (21), an outlet branch pipe (22) and a pair of outlet branch pipes (23). One end of the outlet main pipe (21) is fixedly connected to the middle of the outlet branch pipe (22) and communicates with it. One end of the pair of outlet branch pipes (23) is fixedly connected to both ends of the outlet branch pipe (22) and communicates with it. The other end of the pair of outlet branch pipes (23) is connected to the outlet connection pipe (15) flange on the top of the molecular sieve dryer body (13). A pair of outlet control valves (17) are respectively set at both ends of the outlet branch pipe (22) and located between the outlet branch pipe (23) and the outlet main pipe (21).

4. A natural gas molecular sieve dryer according to claim 3 wherein, The mounting assembly (10) includes a mounting base (24) and a pair of mounting structures (25). The pair of mounting structures (25) are respectively mounted on the mounting base (24) and are detachably connected to the mounting base (24) by bolts. The pair of molecular sieve dryer bodies (13) are respectively mounted on the pair of mounting structures (25) and are detachably connected to the mounting structures (25).

5. A natural gas molecular sieve dryer according to claim 4 wherein, The mounting structure (25) includes a mounting bracket (26), a connecting slider (27), and a clamping structure (28). The bottom of the mounting bracket (26) is detachably connected to the top of the mounting base (24) by bolts. The mounting bracket (26) is provided with a limiting sliding groove (29). The connecting slider (27) is located on one side of the mounting bracket (26) and is slidably connected to the mounting bracket (26). The connecting slider (27) is correspondingly set with the limiting sliding groove (29). The connecting slider (27) and the limiting sliding groove (29) are connected by a locking screw (30). Next, one end of the locking screw (30) passes through the connecting slider (27) and the limiting sliding groove (29), and is locked on the mounting bracket (26) by the locking nut (31). The locking nut (31) and the end of the locking screw (30) passing through the connecting slider (27) and the limiting sliding groove (29) are threadedly connected. The locking screw (30) is rotatably connected to the connecting slider (27) and slidably connected to the limiting sliding groove (29). The clamping structure (28) is fixedly set at the lower end of the connecting slider (27) for clamping the molecular sieve dryer body (13).

6. A natural gas molecular sieve dryer according to claim 5, characterized in that, The clamping structure (28) includes a sliding rail (32), a bidirectional reverse thread screw (33), a pair of sliding connecting arms (34), and a pair of arc-shaped clamping arms (35). One side of the sliding rail (32) is fixedly connected to the lower end of the connecting slider (27). The sliding rail (32) is provided with a limiting installation groove (36). The bidirectional reverse thread screw (33) is set in the limiting installation groove (36). The two ends of the bidirectional reverse thread screw (33) pass through the two ends of the sliding rail (32) respectively and are rotatably connected to the sliding rail (32). One end of the pair of sliding connecting arms (34) is set in the limiting installation groove (36) and is slidably connected to the sliding rail (32). One end of the pair of sliding connecting arms (34) located in the limiting installation groove (36) is respectively sleeved on the two ends of the bidirectional reverse thread screw (33) and threadedly connected to the bidirectional reverse thread screw (33). One end of the pair of arc-shaped clamping arms (35) is fixedly connected to the other end of the pair of sliding connecting arms (34).

7. A natural gas molecular sieve dryer according to claim 6, characterized in that, A manual knob (37) is fixedly provided at one end of the bidirectional reverse thread screw (33). The bidirectional reverse thread screw (33) is provided with a positive thread extending from the middle of the bidirectional reverse thread screw (33) to one end and a reverse thread extending from the middle of the bidirectional reverse thread screw (33) to the other end. One end of one sliding connecting arm (34) is threaded to the end of the bidirectional reverse thread screw (33) with the positive thread, and the other end of the sliding connecting arm (34) is threaded to the end of the bidirectional reverse thread screw (33) with the reverse thread.

8. A natural gas molecular sieve dryer according to claim 7 wherein, The molecular sieve dryer body (13) includes an outer protective shell (38), a molecular sieve body (39), an upper end cover (40), and a lower end cover (41). The outer protective shell (38) has an installation cavity (42) penetrating both ends of the outer protective shell (38). The molecular sieve body (39) is disposed within the installation cavity (42) and is slidably connected to it. The upper end cover (40) and the lower end cover (41) are respectively fitted onto both ends of the outer protective shell (38) and are threadedly connected to it. A first... The first insertion ring (43) is inserted into the mounting cavity (42) at one end and abuts against one end of the molecular sieve body (39). The second insertion ring (44) is fixedly provided on the lower end cover (41). The second insertion ring (44) is inserted into the mounting cavity (42) at one end and abuts against the other end of the molecular sieve body (39). The inlet connection pipe (14) is fixedly provided at the bottom of the lower end cover (41) and communicates with the mounting cavity (42). The outlet connection pipe (15) is fixedly provided at the top of the upper end cover (40) and communicates with the mounting cavity (42).

9. A natural gas molecular sieve dryer according to claim 8 wherein, The molecular sieve body (39) includes a housing (45) and a pair of sealing caps (46). The housing (45) has a housing cavity (47) for filling the molecular sieve. The pair of sealing caps (46) are respectively disposed on both sides of the housing (45). One end of the sealing cap (46) is inserted into the housing cavity (47) and threadedly connected to the housing (45). The sealing cap (46) has several through holes (48) for natural gas to pass through. The outer side of the housing (45) has several limiting protrusions (49). The inner side wall of the mounting cavity (42) has limiting slots (50) that cooperate with the limiting protrusions (49). The limiting protrusions (49) are respectively inserted into the limiting slots (50) and slidably connected to the limiting slots (50).

10. A natural gas molecular sieve dryer according to claim 9 wherein, The lower end cover (41) is provided with a mounting ring (51), which is fixedly connected to the lower end cover (41). There is a receiving groove (52) between the mounting ring (51), the lower end cover (41), and the second insertion ring (44). A spring (53) is provided in the receiving groove (52). One end of the spring (53) abuts against the lower end cover (41), and the other end abuts against the closed cover (46) located at the bottom of the receiving housing (45).

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