A hydrogen gas separator with an expansion joint

Abstract

The present invention relates to the technical field of hydrogen production, and specifically discloses a hydrogen separator with an expansion joint, which includes a flat-tube palladium composite membrane. Outer limit modules are symmetrically arranged on the upper and lower sides of the flat-tube palladium composite membrane. The outer limit module includes strip-shaped rods, and a plurality of strip-shaped rods are equidistantly arranged. The side of the strip-shaped rod close to the flat-tube palladium composite membrane is set as an arc structure. One side of the outer limit module is connected to a protection module, and the protection module includes an expansion joint. The expansion joint is arranged in the middle of one side of the flat-tube palladium composite membrane. The other side of the outer limit module is connected to a stability module, and the stability module includes a square plate member and a stabilizing rod. By adding a protection module with an expansion joint on the upper and lower sides of the flat-tube palladium composite membrane, while the flat-tube palladium composite membrane is not easily damaged due to excessive expansion, it can prevent excessive blocking by the strip-shaped rods. Excessive blocking means that when the upper and lower sides of the flat-tube palladium composite membrane expand, the part where the flat-tube palladium composite membrane contacts the strip-shaped rod will not expand, resulting in a greater air pressure in the inner cavity of the flat-tube palladium composite membrane.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production, and particularly relates to a hydrogen separator with an expansion joint. Background Art

[0002] Hydrogen, as a clean energy source, is widely used in fuel cell vehicles, the electronics industry, and the chemical industry. In the prior art, in a flat tube type palladium composite membrane hydrogen separator and a method for separating hydrogen with an application number of 201810064182.7 that has been publicly disclosed, a flat tube type palladium composite membrane is used. On the one hand, it can reduce the usage amount of metallic palladium and lower the cost. On the other hand, while increasing the effective separation area, it is convenient for sealing, improving the practicability of the palladium membrane separator, and having a wide application prospect in fields such as coal-to-hydrogen and natural gas-to-hydrogen. However, due to the relatively large areas on the upper and lower sides of the flat tube type palladium composite membrane, when the syngas is inside the flat tube type palladium composite membrane, the internal pressure of the flat tube type palladium composite membrane is relatively large, making the upper and lower side surfaces of the flat tube type palladium composite membrane prone to damage. Summary of the Invention

[0003] The purpose of the present invention is to provide a hydrogen separator with an expansion joint to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A hydrogen separator with an expansion joint includes a flat tube type palladium composite membrane. Outer limit modules are symmetrically arranged on the upper and lower sides of the flat tube type palladium composite membrane. The outer limit module includes strip-shaped rods, and a plurality of strip-shaped rods are arranged at equal intervals. The side of the strip-shaped rod close to the flat tube type palladium composite membrane is set as an arc structure. One side of the outer limit module is connected to a protection module, and the protection module includes an expansion joint. The expansion joint is arranged in the middle of one side of the flat tube type palladium composite membrane. The other side of the outer limit module is connected to a stability module. The stability module includes a square plate member and a stability rod. The stability rod is arranged in the middle of the other side of the flat tube type palladium composite membrane. The square plate members are symmetrically arranged above and below both sides of the stability rod, and the square plate members are slidably sleeved on the outer wall of the stability rod. A housing is arranged outside the flat tube type palladium composite membrane, and both ends of the flat tube type palladium composite membrane are connected to the housing. A plurality of intake pipes are equally spaced and connected to one side of the housing, and a plurality of outlet pipes are equally spaced and connected to the other side of the housing. Moreover, both the intake pipes and the outlet pipes are communicated with the inner cavity of the flat tube type palladium composite membrane. A plurality of scavenging pipes are equally spaced and connected to one side of the housing. A first-stage solenoid valve is arranged on the scavenging pipe. A plurality of hydrogen pipes are equally spaced and connected to the other side of the housing. A second-stage solenoid valve is arranged on the hydrogen pipe. A warning lamp is arranged above the middle of one side of the housing.

[0006] Preferably, the outer limit module further includes extension rods, longitudinal plates and transverse plates. The extension rods are equidistantly connected to the side of the strip-shaped rod opposite to the flat tube palladium composite membrane. The longitudinal plates are connected to the ends of the extension rods opposite to the strip-shaped rod. The transverse plates are symmetrically connected to both sides of the longitudinal plates. The arrangement of the extension rods prevents the longitudinal plates from being too close to the flat tube palladium composite membrane and blocking the discharge of hydrogen.

[0007] Flat plates are symmetrically connected to the bottom of the square plate, and the flat plates are connected to a group of transverse plates through positioning bolts.

[0008] Preferably, the protection module further includes mounting plates, connecting plates, sliding plates and sliding notches. The sliding notches are symmetrically opened in the middle of the inner wall of the shell up and down. The mounting plates are symmetrically connected to both ends of the expansion joint up and down. The connecting plates are connected to the side of the mounting plates opposite to the flat tube palladium composite membrane. The sliding plates are connected to the side of the connecting plates opposite to the mounting plates, and the sliding plates are slidably fitted in the sliding notches, restricting the expansion joint while not affecting the expansion effect of the expansion joint and improving the stability of the expansion joint.

[0009] Preferably, the protection module further includes a first-level assembly plate, a second-level assembly plate, inner notches, a first-level positioning frame, a second-level positioning frame and a fixing plate. The first-level assembly plates are connected to both sides of the expansion joint symmetrically up and down, and the first-level assembly plates are connected to the transverse plates. The second-level assembly plates are arranged on the side of the first-level assembly plates away from the transverse plates. The inner notches are respectively opened in the middle of the opposite sides of the first-level assembly plates and the second-level assembly plates. The first-level positioning frame is connected to the top of the first-level assembly plates. The second-level positioning frame is connected to the top of the second-level assembly plates, and both the first-level positioning frame and the second-level positioning frame are in a U-shaped structure. The fixing plates are symmetrically connected to both sides of the first-level assembly plates and both sides of the second-level assembly plates respectively, and adjacent two groups of fixing plates are connected through positioning bolts, facilitating the disassembly and assembly between the outer limit module and the protection module.

[0010] Preferably, the protection module further includes square columns, first-level round holes, return springs, cylindrical magnets, second-level round holes and magnetic blocks. The square columns are symmetrically arranged on both sides of the expansion joint up and down, and the square columns are connected to the mounting plates. The ends of the square columns opposite to the mounting plates penetrate through the inner notches. The first-level round holes are opened on the side of the square columns opposite to the flat tube palladium composite membrane. The return springs and the cylindrical magnets are both arranged in the first-level round holes. Both ends of the return springs are respectively connected to the square columns and the cylindrical magnets. The second-level round holes are opened in the middle of the inner wall of the first-level positioning frame. The magnetic blocks are arranged in the second-level round holes and are connected to the first-level positioning frame. The end of the cylindrical magnet away from the magnetic block penetrates through the first-level round hole and is in the second-level round hole, and the cylindrical magnet is magnetically connected to the magnetic block, connecting the square column and the first-level positioning frame.

[0011] Preferably, the protection module further includes a limiting notch and a limiting block. The limiting notches are symmetrically formed inside the square column, and are communicated with the first-level round holes. The limiting block is slidably fitted in the limiting notch and is connected to the cylindrical magnet to limit the cylindrical magnet and prevent the cylindrical magnet from detaching from the first-level round hole.

[0012] Preferably, the stabilizing module further includes a first-level stabilizing plate member and a second-level stabilizing plate member. The first-level stabilizing plate members are symmetrically connected to both ends of the stabilizing rod up and down. The second-level stabilizing plate member is connected to the side of the first-level stabilizing plate member and the stabilizing rod opposite to each other, and the second-level stabilizing plate member is connected to the housing through positioning bolts to fix the stabilizing rod and ensure the stability of the stabilizing rod.

[0013] Preferably, the stabilizing module further includes an equipment notch and a contact switch. The equipment notch is formed on the side of the first-level stabilizing plate member opposite to the square plate member. The contact switch is embedded in the equipment notch. The square plate member contacts the contact switch, and the contact switch transmits a signal to an external device terminal. The external device terminal receives the signal and controls the warning light, the first-level solenoid valve, and the second-level solenoid valve to open.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When the present invention is in use, by adding a protection module with expansion joints on both the upper and lower sides of the flat-tube palladium composite membrane, while preventing the flat-tube palladium composite membrane from being damaged due to excessive expansion, it also prevents excessive obstruction by the strip-shaped rod. That is, when the upper and lower sides of the flat-tube palladium composite membrane expand, the parts of the flat-tube palladium composite membrane in contact with the strip-shaped rod do not expand, resulting in a greater air pressure in the inner cavity of the flat-tube palladium composite membrane. When the air pressure in the flat-tube palladium composite membrane is relatively high, the square plate member contacts the contact switch, and the contact switch transmits a signal to the external device terminal. The external device terminal receives the signal and controls the warning light, the first-level solenoid valve, and the second-level solenoid valve to open. The warning light reminds the personnel that the flat-tube palladium composite membrane has expanded too much, and it is necessary to reduce the gas delivery volume while inspecting the flat-tube palladium composite membrane to prevent it from being damaged due to expansion. The opening of the first-level solenoid valve and the second-level solenoid valve stops the collection of hydrogen, preventing the flat-tube palladium composite membrane from being damaged due to expansion and causing gas to enter the housing and contaminate the purity of the hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the flat-tube palladium composite membrane of a hydrogen separator with expansion joints.

[0016] Figure 2 It is a cross-sectional view of the housing of a hydrogen separator with expansion joints.

[0017] Figure 3 It is a schematic diagram of the strip-shaped rod of a hydrogen separator with expansion joints.

[0018] Figure 4 It is a schematic diagram of the expansion joint of a hydrogen separator with expansion joints.

[0019] Figure 5 It is a sectional view of the first - stage positioning frame of a hydrogen separator with an expansion joint.

[0020] Figure 6 It is a sectional view of the square column of a hydrogen separator with an expansion joint.

[0021] Figure 7 It is a schematic diagram of the square plate of a hydrogen separator with an expansion joint.

[0022] Figure 8 It is a schematic diagram of the overall structure of a hydrogen separator with an expansion joint.

[0023] Figure 9 It is a schematic diagram of the hydrogen pipe of a hydrogen separator with an expansion joint.

[0024] In the figure: 1. Flat - tube palladium composite membrane; 2. Outer limit module; 21. Strip - shaped rod; 22. Extension rod; 23. Longitudinal plate; 24. Transverse plate; 3. Protection module; 31. Expansion joint; 32. Mounting plate; 33. Connecting plate; 34. Sliding plate; 35. Sliding notch; 36. First - stage assembly plate; 37. Second - stage assembly plate; 38. Inner notch; 39. First - stage positioning frame; 310. Second - stage positioning frame; 311. Fixed plate; 312. Square column; 313. First - stage round hole; 314. Return spring; 315. Column - shaped magnet; 316. Second - stage round hole; 317. Magnet block; 318. Limit notch; 319. Limit block; 4. Stabilization module; 41. Square plate; 411. Flat plate; 42. Stabilizing rod; 43. First - stage stabilizing plate; 44. Second - stage stabilizing plate; 45. Equipment notch; 46. Contact switch; 5. Shell; 6. Inlet pipe; 7. Outlet pipe; 8. Sweeping pipe; 9. First - stage solenoid valve; 10. Hydrogen pipe; 11. Second - stage solenoid valve; 12. Warning lamp. Specific implementation mode

[0025] Example 1. Please refer to Figures 1-9As shown in the figure, a hydrogen separator with an expansion joint includes a flat-tube palladium composite membrane 1. Outer limit modules 2 are symmetrically arranged on the upper and lower sides of the flat-tube palladium composite membrane 1. The outer limit module 2 includes strip-shaped rods 21, and a plurality of strip-shaped rods 21 are arranged at equal intervals. The side of the strip-shaped rod 21 close to the flat-tube palladium composite membrane 1 is set as an arc structure. One side of the outer limit module 2 is connected to a protection module 3. The protection module 3 includes an expansion joint 31, and the expansion joint 31 is arranged in the middle of one side of the flat-tube palladium composite membrane 1. The other side of the outer limit module 2 is connected to a stability module 4. The stability module 4 includes a square plate 41 and a stabilizing rod 42. The stabilizing rod 42 is arranged in the middle of the other side of the flat-tube palladium composite membrane 1. The square plates 41 are symmetrically arranged on both sides of the stabilizing rod 42 up and down, and the square plate 41 is slidably sleeved on the outer wall of the stabilizing rod 42. A housing 5 is arranged outside the flat-tube palladium composite membrane 1, and both ends of the flat-tube palladium composite membrane 1 are connected to the housing 5. A plurality of intake pipes 6 are equidistantly connected to one side of the housing 5, and a plurality of outlet pipes 7 are equidistantly connected to the other side of the housing 5. The intake pipes 6 and the outlet pipes 7 are both communicated with the inner cavity of the flat-tube palladium composite membrane 1. A plurality of scavenging pipes 8 are equidistantly connected to one side of the housing 5. A first-stage solenoid valve 9 is arranged on the scavenging pipe 8. A plurality of hydrogen pipes 10 are equidistantly connected to the other side of the housing 5. A second-stage solenoid valve 11 is arranged on the hydrogen pipe 10. A warning lamp 12 is arranged above the middle of one side of the housing 5.

[0026] Reference Figures 1-3 and Figure 7 As shown in the figure, the outer limit module 2 further includes extension rods 22, longitudinal plates 23 and transverse plates 24. The extension rods 22 are equidistantly connected to the side of the strip-shaped rod 21 opposite to the flat-tube palladium composite membrane 1. The longitudinal plates 23 are connected to the ends of the extension rods 22 opposite to the strip-shaped rod 21. The transverse plates 24 are symmetrically connected to both sides of the longitudinal plates 23. The arrangement of the extension rods prevents the longitudinal plates 23 from being too close to the flat-tube palladium composite membrane 1 and blocking the discharge of hydrogen.

[0027] Symmetrically connected to the bottom of the square plate 41 are flat plates 411, and the flat plates 411 are connected to a group of transverse plates 24 through positioning bolts.

[0028] Reference Figures 1-4 As shown in the figure, the protection module 3 further includes mounting plates 32, connecting plates 33, sliding plates 34 and sliding grooves 35. The sliding grooves 35 are symmetrically opened in the middle of the inner wall of the housing 5 up and down. The mounting plates 32 are symmetrically connected to both ends of the expansion joint 31. The connecting plates 33 are connected to the side of the mounting plates 32 opposite to the flat-tube palladium composite membrane 1. The sliding plates 34 are connected to the side of the connecting plates 33 opposite to the mounting plates 32, and the sliding plates 34 are slidably engaged in the sliding grooves 35. While not affecting the expansion effect of the expansion joint 31, the expansion joint 31 is restricted, improving the stability of the expansion joint 31.

[0029] Reference Figures 1-5As shown, the protection module 3 also includes a primary assembly panel 36, a secondary assembly panel 37, an inner groove opening 38, a primary positioning frame 39, a secondary positioning frame 310 and a fixed plate 311. The primary assembly panel 36 is connected to the two sides of the expansion joint 31 symmetrically arranged in the upper and lower directions, and the primary assembly panel 36 is connected to the transverse plate 24, and the secondary assembly panel 37 is arranged on the side of the primary assembly panel 36 away from the transverse plate 24. The inner groove opening 38 is respectively opened in the middle of the side opposite to the primary assembly panel 36 and the secondary assembly panel 37. The primary positioning frame 39 is connected to the top of the primary assembly panel 36, and the secondary positioning frame 310 is connected to the top of the secondary assembly panel 37. The primary positioning frame 39 and the secondary positioning frame 310 are both U-shaped structures. The fixed plate 311 is symmetrically connected to the two sides of the primary assembly panel 36 and the two sides of the secondary assembly panel 37, and the two adjacent groups of fixed plates 311 are connected by positioning bolts, which is convenient for disassembly and assembly between the outer limit module 2 and the protection module 3.

[0030] refer to Figures 1-5 As shown, the protection module 3 also includes a square cylinder 312, a primary circular hole 313, a reset spring 314, a cylindrical magnet 315, a secondary circular hole 316 and a magnetic block 317. The square cylinder 312 is symmetrically arranged on both sides of the expansion joint 31, and the square cylinder 312 is connected to the mounting plate 32. The end of the square cylinder 312 opposite to the mounting plate 32 passes through the inner groove opening 38. The primary circular hole 313 is opened on the side of the square cylinder 312 opposite to the flat tubular palladium composite membrane 1. The reset spring 314 and the cylindrical magnet 315 are both arranged at In the primary circular hole 313, the two ends of the return spring 314 are respectively connected to the square cylinder 312 and the cylindrical magnet 315, the secondary circular hole 316 is opened in the middle of the inner wall of the primary positioning frame 39, the magnetic block 317 is arranged in the secondary circular hole 316, and the magnetic block 317 is connected to the primary positioning frame 39, the end of the cylindrical magnet 315 away from the magnetic block 317 passes through the primary circular hole 313 and is in the secondary circular hole 316, and the cylindrical magnet 315 is magnetically connected to the magnetic block 317, connecting the square cylinder 312 and the primary positioning frame 39.

[0031] refer to Figure 6 As shown, the protection module 3 also includes a limiting slot 318 and a limiting block 319. The limiting slot 318 is symmetrically arranged inside the square cylinder 312, and the limiting slot 318 is communicated with the primary circular hole 313. The limiting block 319 is slidably fitted in the limiting slot 318, and the limiting block 319 is connected to the cylindrical magnet 315 to limit the cylindrical magnet 315 and prevent the cylindrical magnet 315 from escaping from the primary circular hole 313.

[0032] refer to Figures 1-3 and Figure 7As shown, the stabilization module 4 further includes a primary stabilization plate member 43 and a secondary stabilization plate member 44. The primary stabilization plate member 43 is symmetrically connected to both ends of the stabilizing rod 42 in the up and down directions. The secondary stabilization plate member 44 is connected to the side of the primary stabilization plate member 43 opposite to the stabilizing rod 42, and the secondary stabilization plate member 44 is connected to the housing 5 through positioning bolts to fix the stabilizing rod 42 and ensure the stability of the stabilizing rod 42.

[0033] Reference Figure 7 As shown, the stabilization module 4 further includes an equipment notch 45 and a contact switch 46. The equipment notch 45 is opened on the side of the primary stabilization plate member 43 opposite to the square plate member 41. The contact switch 46 is embedded in the equipment notch 45. The square plate member 41 contacts the contact switch 46, and the contact switch 46 transmits a signal to an external peripheral terminal. The external peripheral terminal receives the signal and controls the warning light 12, the primary solenoid valve 9, and the secondary solenoid valve 11 to open.

[0034] Working principle: The gas to be separated is introduced into the flat tube type palladium composite membrane 1 through the intake pipe 6. The hydrogen in the gas permeates through the flat tube type palladium composite membrane 1 and enters the housing 5. The purge gas is introduced into the housing 5 through the sweep pipe 8 and is discharged from the hydrogen pipe 10 together with the hydrogen to complete the separation and collection of hydrogen. The waste gas passing through the flat tube type palladium composite membrane 1 is discharged from the outlet pipe 7. When the air pressure in the flat tube type palladium composite membrane 1 is too high and causes the upper and lower sides of the flat tube type palladium composite membrane 1 to expand, the strip-shaped member 21 provides a certain degree of blocking and restriction to the upper and lower sides of the flat tube type palladium composite membrane 1. The expansion joint 31 cooperates with the outer limit module 2 to provide a certain expansion effect for the flat tube type palladium composite membrane 1, so that the flat tube type palladium composite membrane 1 is not easily damaged due to excessive expansion, while preventing the strip-shaped member 21 from over-blocking. That is, when the upper and lower sides of the flat tube type palladium composite membrane 1 expand, the parts of the flat tube type palladium composite membrane 1 in contact with the strip-shaped member 21 do not expand, resulting in a greater air pressure in the inner cavity of the flat tube type palladium composite membrane 1. When the air pressure in the flat tube type palladium composite membrane 1 is relatively high, the strip-shaped member 21 drives the square plate member 41 to move towards the primary stabilization plate member 43 until the square plate member 41 contacts the contact switch 46. The contact switch 46 transmits a signal to the external peripheral terminal. The external peripheral terminal receives the signal and controls the warning light 12, the primary solenoid valve 9, and the secondary solenoid valve 11 to open. The warning light 12 reminds the personnel that the flat tube type palladium composite membrane 1 has expanded too much, and it is necessary to reduce the gas delivery volume while checking the flat tube type palladium composite membrane 1 to prevent the flat tube type palladium composite membrane 1 from being damaged due to expansion. The opening of the primary solenoid valve 9 and the secondary solenoid valve 11 stops the collection of hydrogen to prevent the flat tube type palladium composite membrane 1 from being damaged due to expansion, resulting in gas entering the housing 5 and contaminating the purity of hydrogen;

[0035] When installing the expansion joint 31, the expansion joint 31 is arranged on one side of the flat-tube palladium composite membrane 1, and the sliding plate member 34 is slidably fitted in the sliding notch 35. The primary assembly plate member 36 and the secondary assembly plate member 37 are sleeved outside the square column 312, and the end of the cylindrical magnet 315 opposite to the return spring 314 extends into the secondary round hole 316, and the magnetic block 317 is adsorbed to the cylindrical magnet 315. The positioning bolts are used to connect and fix between two adjacent fixed plate members 311, thereby completing the connection and fixation between the square column 312 and the outer limit module 2, that is, completing the installation and fixation of the expansion joint 31.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen separator with an expansion joint, comprising a flat tube type palladium composite membrane (1), characterized in that: An outer limit module (2) is symmetrically arranged on the upper and lower sides of a flat tubular palladium composite membrane (1), the outer limit module (2) comprises a strip rod (21), a plurality of strip rods (21) are equidistantly arranged, a side of the strip rod (21) close to the flat tubular palladium composite membrane (1) is arranged as an arc structure, one side of the outer limit module (2) is connected to a protection module (3), the protection module (3) comprises an expansion joint (31), the expansion joint (31) is arranged in the middle of one side of the flat tubular palladium composite membrane (1), the other side of the outer limit module (2) is connected to a stabilizing module (4), the stabilizing module (4) comprises a square plate (41) and a stabilizing rod (42), the stabilizing rod (42) is arranged in the middle of the other side of the flat tubular palladium composite membrane (1), the square plate (41) is symmetrically arranged on the stabilizing rod (42) from top to bottom. ) on both sides, and the square plate (41) is slidably sleeved on the outer wall of the stabilizing rod (42), a shell (5) is provided on the outer side of the flat tube type palladium composite membrane (1), and both ends of the flat tube type palladium composite membrane (1) are connected to the shell (5), one side of the shell (5) is equidistantly connected to an air inlet pipe (6), and the other side of the shell (5) is equidistantly connected to an air outlet pipe (7), and the air inlet pipe (6) and the air outlet pipe (7) are both connected to the inner cavity of the flat tube type palladium composite membrane (1), one side of the shell (5) is equidistantly connected to a scavenging pipe (8), and the scavenging pipe (8) is provided with a first-level electromagnetic valve (9), and the other side of the shell (5) is equidistantly connected to a hydrogen pipe (10), and the hydrogen pipe (10) is provided with a second-level electromagnetic valve (11), and a warning light (12) is provided at the middle upper part of one side of the shell (5).

2. A hydrogen separator with an expansion joint according to claim 1, characterized in that: The outer limit module (2) further comprises an extension rod (22), a longitudinal plate (23) and a transverse plate (24), wherein the extension rod (22) is equidistantly connected to the side of the strip rod (21) opposite to the flat tube type palladium composite membrane (1), the longitudinal plate (23) is connected to the end of the extension rod (22) opposite to the strip rod (21), and the transverse plate (24) is symmetrically connected to both sides of the longitudinal plate (23); A flat plate (411) is symmetrically connected to the bottom of the square plate member (41), and the flat plate (411) is connected to a group of transverse plate members (24) via positioning bolts.

3. A hydrogen separator with an expansion joint according to claim 1, characterized in that: The protection module (3) further comprises a mounting plate (32), a connecting plate (33), a sliding plate (34) and a sliding notch (35); the sliding notch (35) is symmetrically arranged in the middle of the inner wall of the housing (5); the mounting plate (32) is symmetrically connected to both ends of the expansion joint (31); the connecting plate (33) is connected to the side of the mounting plate (32) opposite to the flat tube type palladium composite membrane (1); the sliding plate (34) is connected to the side of the connecting plate (33) opposite to the mounting plate (32); and the sliding plate (34) is slidably fitted in the sliding notch (35).

4. A hydrogen separator with an expansion joint according to claim 2, characterized in that: The protection module (3) further comprises a primary assembly plate (36), a secondary assembly plate (37), an inner groove opening (38), a primary positioning frame (39), a secondary positioning frame (310) and a fixing plate (311), wherein the primary assembly plate (36) is connected to the expansion joint (31) and is symmetrically arranged on both sides thereof, and the primary assembly plate (36) is connected to the transverse plate (24), the secondary assembly plate (37) is arranged on a side of the primary assembly plate (36) away from the transverse plate (24), and the inner groove opening (38) is respectively arranged on one side of the primary assembly plate (36) and the second side of the transverse plate (24). In the middle of one side of the primary assembly plate (36) and the secondary assembly plate (37) opposite each other, a primary positioning frame (39) is connected to the top of the primary assembly plate (36), and a secondary positioning frame (310) is connected to the top of the secondary assembly plate (37), and both the primary positioning frame (39) and the secondary positioning frame (310) are U-shaped structures, and fixed plates (311) are symmetrically connected to both sides of the primary assembly plate (36) and both sides of the secondary assembly plate (37), and two adjacent groups of fixed plates (311) are connected by positioning bolts.

5. A hydrogen separator with an expansion joint according to claim 4, characterized in that: The protection module (3) further comprises a square column (312), a primary circular hole (313), a reset spring (314), a cylindrical magnet (315), a secondary circular hole (316) and a magnetic block (317); the square column (312) is symmetrically arranged on both sides of the expansion joint (31) in an upper and lower manner, and the square column (312) is connected to the mounting plate (32); the end of the square column (312) opposite to the mounting plate (32) passes through the inner groove opening (38); the primary circular hole (313) is provided on the side of the square column (312) opposite to the flat tubular palladium composite membrane (1); the reset spring (314) is provided on the side of the square column (312) opposite to the flat tubular palladium composite membrane (1); and the cylindrical magnet (315) are both arranged in the primary circular hole (313); the two ends of the return spring (314) are respectively connected to the square cylinder (312) and the cylindrical magnet (315); the secondary circular hole (316) is opened in the middle of the inner wall of the primary positioning frame (39); the magnetic block (317) is arranged in the secondary circular hole (316), and the magnetic block (317) is connected to the primary positioning frame (39); one end of the cylindrical magnet (315) away from the magnetic block (317) passes through the primary circular hole (313) and is located in the secondary circular hole (316); and the cylindrical magnet (315) and the magnetic block (317) are magnetically connected.

6. A hydrogen separator with an expansion joint according to claim 5, characterized in that: The protection module (3) further comprises a limiting notch (318) and a limiting block (319); the limiting notch (318) is symmetrically arranged inside the square column (312), and the limiting notch (318) is connected to the primary circular hole (313); the limiting block (319) is slidably fitted in the limiting notch (318), and the limiting block (319) is connected to the cylindrical magnet (315).

7. A hydrogen separator with an expansion joint according to claim 1, characterized in that: The stabilizing module (4) further comprises a primary stabilizing plate (43) and a secondary stabilizing plate (44); the primary stabilizing plate (43) is symmetrically connected to the two ends of the stabilizing rod (42) in an upper and lower manner; the secondary stabilizing plate (44) is connected to the side of the primary stabilizing plate (43) opposite to the stabilizing rod (42); and the secondary stabilizing plate (44) is connected to the housing (5) via positioning bolts.

8. A hydrogen separator with an expansion joint according to claim 7, characterized in that: The stabilizing module (4) further comprises a device slot (45) and a contact switch (46); the device slot (45) is provided on a side of the primary stabilizing plate (43) opposite to the square plate (41); and the contact switch (46) is embedded in the device slot (45).

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