Guide sleeve and water electrolysis hydrogen production device

Abstract

The utility model relates to the technical field of sleeve pieces, in particular to a guide sleeve and a water electrolysis hydrogen production device. The guide sleeve comprises a ring body and a pipe body, an included angle part of the guide sleeve is formed at the joint of the peripheral surface of the pipe body and the corresponding end face of the ring body, a groove is formed in the included angle part, a reinforcing object is filled in the groove, the reinforcing object, the ring body and the pipe body are combined into a whole, and the surface of the reinforcing object forms one part of the outer surface of the guide sleeve. And the material hardness of the reinforcer meets the hardness required by the included angle part. The surface hardness requirement is met by utilizing the hardness of a reinforcing object, the influence of high-frequency quenching on the hardness of an included angle part area which cannot be effectively treated is compensated, the process is simple, the hardness of each part of the surface of the guide sleeve can meet the set requirement, and the failure caused by the acting force of a disc spring is not easily caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to sleeve technology field, concretely relates to a guide sleeve and water electrolysis hydrogen production device. BACKGROUND

[0002] Dish spring is more applied in high load use condition, and dish spring installation usually needs to cooperate with guide sleeve, and the dish spring stacked and installed thereon is guided and supported by the guide sleeve. The dish spring and guide sleeve cooperation structure is applied in water electrolysis hydrogen production device, and the basic structure of the water electrolyysis hydrogen production device can be seen from the water electrolysis hydrogen production device disclosed in the Chinese utility model patent with the authorized announcement number CN222251020U. The device comprises an electrolytic cell assembly and a locking mechanism. The electrolytic cell assembly comprises pressure plates at both ends and a plurality of polar plates between the pressure plates at both ends. The locking mechanism is used to lock the pressure plates and the polar plates of the electrolytic cell assembly together. The locking mechanism comprises a first fastener, a second fastener and a connecting piece. The first fastener and the second fastener are both nuts. The connecting piece is a screw rod. The screw rod passes through the polar plates and the pressure plates of the electrolytic cell assembly and cooperates with the two nuts to realize locking connection. A dish spring is arranged between the nut and the pressure plate to play a pre-tightening and anti-loosening function. The dish spring is installed on the guide sleeve, and the guide sleeve plays a role of fixing and supporting the dish spring.

[0003] In order to specifically explain the installation structure of the guide sleeve and the dish spring, combined with Figure 1 、 Figure 2 The guide sleeve 100 is sleeved on the screw rod 400 and can move axially relative to the screw rod 400. The guide sleeve 100 has an integral ring body 1 and a pipe body 2. The dish spring 200 is sleeved on the pipe body 2 of the guide sleeve 100 and can move axially relative to the pipe body 2. The nut 500 is connected to the end of the screw rod 400. The end of the guide sleeve 100 away from the nut 500 is sleeved with a gasket 300. When the nut 500 is tightened, the nut 500 presses the ring body 1 of the guide sleeve, the ring body 1 presses the dish spring 200, the dish spring 200 presses the gasket 300, and the gasket 300 is pressed on the fixed base. For the water electrolysis hydrogen production device, the fixed base is the end pressure plate of the electrolytic cell assembly.

[0004] The outer diameter of the ring body 1 of the guide sleeve 100 is larger than the outer diameter of the tube body 2, and the inner diameters are the same. The end surface of the ring body 1 is in contact with the outer peripheral surface of the tube body 2, and the intersection forms the included angle part of the guide sleeve. The included angle part includes a small part of the end surface of the ring body 1 adjacent to the outer peripheral surface of the tube body 2 and a small part of the outer peripheral surface of the tube body 2 adjacent to the end surface of the ring body 1. The end surface of the ring body 1 close to the tube body 2 is used to axially abut the disc spring, and the outer peripheral surface of the tube body 2 is radially abutted by the disc spring. The axial length of the tube body 2 satisfies the installation of multiple disc springs. In order to ensure the smooth deformation of the disc spring 200 abutting against the end surface of the ring body 1, the included angle part is a right angle structure, the end surface of the ring body 1 is vertically connected with the outer peripheral surface of the tube body 2, the end surface of the ring body 1 is a plane perpendicular to the axis of the guide sleeve, and the outer peripheral surface of the tube body 2 is a cylindrical surface surrounding the axis of the guide sleeve. The cylindrical surface directly intersects with the plane, and provides space for the deformation of the disc spring adjacent to the included angle part.

[0005] The guide sleeve can guide and support the disc spring, ensuring that it can work correctly and stably when subjected to pressure. During compression and release, the disc spring may be offset or twisted due to uneven force or external factors, and the presence of the guide sleeve can effectively prevent this from happening. This guide sleeve is generally made of metal material by casting or forging process, and then machined according to the required geometric size and tolerance range by mechanical cutting method.

[0006] The core function of the guide sleeve is to provide stable sliding or rotating support, which needs to resist wear, indentation and plastic deformation. When the disc spring is repeatedly compressed / expanded, the outer surface of the guide sleeve contacts the disc spring to generate sliding friction. If the wear is serious, it will cause the gap between the guide sleeve and the disc spring to expand, causing the disc spring to move eccentrically or be eccentrically loaded, reducing the system accuracy and easily causing jamming. Moreover, when the disc spring bears a relatively large load, the guide sleeve will also bear a relatively large force, which may cause the guide sleeve to deform and cause structural failure.

[0007] Currently, in order to reduce the wear of the disc spring on the surface of the guide sleeve and improve the mechanical properties of the guide sleeve, a quenching process is usually used to enhance the hardness of the outer surface of the guide sleeve, and high hardness is used to maintain geometric accuracy. In order to obtain high hardness, the quenching temperature is high, and high-frequency quenching device is currently used for processing. After heating by high-frequency coil, synchronous cooling is carried out. The size difference between the ring body and the tube body of the guide sleeve is large, and the quenching of the ring body and the tube body is carried out separately. The quenching process of the tube body is to heat from the end of the tube body axially away from the ring body to the other end connected with the ring body in the corresponding high-frequency coil to quench the outer peripheral surface thereof. The quenching process of the ring body is to rotate one circle in the corresponding high-frequency coil. The ring body extends into the corresponding high-frequency coil in the radial direction, and the part radially larger than the tube body extends into the high-frequency coil, while the tube body is located outside the high-frequency coil. The ring body rotates one circle around the axis of the guide sleeve to quench the two end surfaces and the outer peripheral surface thereof.

[0008] When quenching, the high-frequency coil does not contact the guide sleeve, and when quenching the pipe body, the coil is moved to a position close to the end face of the ring body without contacting the ring body, and when quenching the ring body, the coil is stretched to a position close to the outer peripheral surface of the pipe body without contacting the pipe body, so that the corner portion where the outer peripheral surface of the pipe body and the end face of the ring body meet cannot be covered and cannot be effectively quenched, and the hardness of the corner portion is generally lower than that of other areas, and the corner portion of the guide sleeve also bears wear and stress and is a stress concentration point, and the hardness of the corner portion is insufficient, and stress deformation is prone to occur, resulting in structural failure. Content of the utility model

[0009] The utility model discloses a guide sleeve to solve the problem that the hardness of the corner portion of the guide sleeve for installing disc spring is low due to ineffective treatment during high-frequency quenching, which further causes failure, and the utility model also discloses a water electrolysis hydrogen production device to solve the above problem.

[0010] The technical scheme of the guide sleeve of the utility model is:

[0011] A guide sleeve comprises a ring body and a pipe body, and the corner portion of the guide sleeve is formed at the joint of the outer peripheral surface of the pipe body and the corresponding end face of the ring body, the corner portion is provided with a groove, the groove is filled with a reinforcing material, the reinforcing material is combined with the ring body and the pipe body to form an integral whole, the surface of the reinforcing material constitutes part of the outer surface of the guide sleeve, and the material hardness of the reinforcing material meets the required hardness of the corner portion.

[0012] Beneficial effects: the utility model innovatively provides a guide sleeve capable of enhancing the hardness of the corner portion of the guide sleeve, the corner portion is formed at the joint of the end face of the ring body of the guide sleeve and the outer peripheral surface of the pipe body, a groove is arranged at the corner portion to fill the reinforcing material, the surface of the reinforcing material is used as the surface of the corner portion, the hardness of the reinforcing material is used to meet the surface hardness requirement of the corner portion, the hardness influence of high-frequency quenching on the corner portion area that cannot be effectively treated is compensated, the process is simple, the hardness of the surface of the guide sleeve at all positions meets the set requirement, and the guide sleeve is not prone to failure caused by the action force of the disc spring.

[0013] Further, the ring body and the pipe body are separately arranged and welded, the ring body and the pipe body are provided with a weld seam at the corner portion, the material of the weld seam forming the corner portion constitutes the reinforcing material, and the groove is formed by the bevel of the weld seam of the corner portion.

[0014] Further, the weld seam forming the corner portion is welded between the end face of the pipe body and the corresponding end face of the ring body, and the surface of the weld seam of the corner portion is flush with the outer peripheral surface of the pipe body.

[0015] Further, the weld seam of the corner portion is an outer weld seam, and an inner weld seam is further formed at the joint of the inner peripheral surface of the ring body and the inner peripheral surface of the pipe body.

[0016] Further, the outer weld is a J-shaped weld, and the inner weld is a V-shaped weld.

[0017] Further, the depth of the outer weld is greater than the depth of the inner weld.

[0018] Further, the end of the pipe body is provided with a chamfer, and the chamfer and the end face of the ring body form the groove, and a single-side V-shaped weld is formed at the groove.

[0019] Further, the ring body is sleeved on the end of the pipe body, and the aperture of the ring body at the included angle portion is provided with a diameter expansion portion to form the groove with the outer peripheral surface of the pipe body, and a weld at the included angle portion is formed at the groove.

[0020] Further, a V-shaped weld is formed between the aperture of the ring body away from the included angle portion and the end of the pipe body.

[0021] The technical scheme of the water electrolysis hydrogen production device is as follows:

[0022] The water electrolysis hydrogen production device comprises a fastening assembly for fixedly connecting two end plates and a polar plate between the two end plates, the fastening assembly comprises a disc spring and a guide sleeve, the guide sleeve comprises a ring body and a pipe body, an included angle portion of the guide sleeve is formed at the joint of the outer peripheral surface of the pipe body and the corresponding end face of the ring body, the included angle portion is provided with a groove, the groove is filled with a reinforcing material, the reinforcing material is combined with the ring body and the pipe body to form an integral whole, the surface of the reinforcing material forms part of the outer surface of the guide sleeve, and the material hardness of the reinforcing material meets the required hardness of the included angle portion.

[0023] The water electrolysis hydrogen production device is provided with a guide sleeve capable of enhancing the hardness of the included angle portion of the guide sleeve, the included angle portion is formed at the joint of the end face of the ring body of the guide sleeve and the outer peripheral surface of the pipe body, a groove is arranged at the included angle portion to fill the reinforcing material, the surface of the reinforcing material is used as the surface at the included angle portion, the hardness of the reinforcing material is used to meet the surface hardness requirement, the hardness influence of the high-frequency quenching on the included angle portion area which cannot be effectively treated is compensated, the process is simple, the hardness of the surface of the guide sleeve can meet the set requirement, and the guide sleeve is not easy to be caused to fail due to the action force of the disc spring.

[0024] Further, the ring body and the pipe body are separately arranged and welded, the ring body and the pipe body are provided with a weld at the included angle portion, the material of the weld forming the included angle portion constitutes the reinforcing material, and the groove is formed at the bevel of the weld at the included angle portion.

[0025] Further, the weld forming the included angle portion is welded between the end face of the pipe body and the corresponding end face of the ring body, and the surface of the weld at the included angle portion is flush with the outer peripheral surface of the pipe body.

[0026] Further, the weld at the corner part is an outer weld, and an inner weld is formed at the joint between the inner circumferential surface of the ring body and the inner circumferential surface of the pipe body.

[0027] Further, the outer weld is a J-shaped weld, and the inner weld is a V-shaped weld.

[0028] Further, the depth of the outer weld is greater than the depth of the inner weld.

[0029] Further, the end of the pipe body is provided with a chamfer, and the chamfer and the end surface of the ring body form the groove, and a single-side V-shaped weld is formed at the groove.

[0030] Further, the ring body is sleeved on the end of the pipe body, and a diameter expansion part is arranged at the aperture of the hole of the ring body at the corner part to form the groove with the outer circumferential surface of the pipe body, and the weld at the corner part is formed at the groove.

[0031] Further, a V-shaped weld is formed between the aperture of the hole of the ring body facing away from the corner part and the end of the pipe body. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a mounting structure diagram of a guide sleeve and a disc spring in the prior art;

[0033] Figure 2 It is a structure diagram of the guide sleeve in the prior art; Figure 1

[0034] Figure 3 It is a structure diagram of embodiment 1 of the guide sleeve of the utility model;

[0035] Figure 4 It is a structure diagram of embodiment 2 of the guide sleeve of the utility model;

[0036] Figure 5 It is a structure diagram of embodiment 3 of the guide sleeve of the utility model.

[0037] In the drawing: 100, guide sleeve; 200, disc spring; 300, gasket; 400, screw rod; 500, nut;

[0038] 1, ring body; 2, pipe body; 3, outer weld; 4, inner weld; 5, single-side V-shaped weld; 6, end surface groove; 7, corner groove. DETAILED DESCRIPTION

[0039] The basic concept of the guide sleeve of the utility model is that, aiming at the corner part area which cannot be effectively treated by high-frequency quenching, a groove is arranged and filled with reinforcing material, the hardness of the reinforcing material is used to meet the surface hardness requirement at the place, so that the place is not easy to be affected by the disc spring force and cause failure.

[0040] ​The present invention will be described in detail below with reference to the embodiments.

[0041] Embodiment 1 of the guide sleeve of this utility model:

[0042] like Figure 3 As shown, the guide sleeve includes a ring 1 and a tube 2. The outer diameter of the ring 1 is larger than the outer diameter of the tube 2, and the axial dimension of the tube 2 is larger than the axial dimension of the ring 1. The guide sleeve is used to install disc springs, which are fitted onto the tube 2. There are multiple disc springs, with the inner edge of the disc spring contacting the outer circumferential surface of the tube 2. The disc spring closest to the ring 1 abuts against the end face of the ring 1. The junction between the outer circumferential surface of the tube 2 and the corresponding end face of the ring 1 forms an angled portion of the guide sleeve. The corresponding end face of the ring 1 used to form the angled portion is the end face of the outer circumferential surface of the adjacent tube 2. The angled portion has a groove filled with a reinforcing material. The reinforcing material is integrated with the ring 1 and the tube 2. The outer surface of the reinforcing material is flush with the outer circumferential surface of the tube 2 and / or the end face of the ring 1. The surface of the reinforcing material constitutes part of the outer surface of the guide sleeve for mating with the disc springs. The groove opening area meets the surface area requirements for increased hardness at the angled portion, and the material hardness of the reinforcing material meets the required hardness at the angled portion.

[0043] For the angled area formed where the end face of the ring 1 of the guide sleeve meets the outer circumferential surface of the tube 2, a groove is set in the angled area to fill the reinforcing material. The surface of the reinforcing material is used as the surface of the angled area, and the hardness of the reinforcing material is used to meet the surface hardness requirements of the area. This compensates for the hardness effect of high-frequency quenching on the angled area that cannot be effectively treated. The process is simple. After the tube 2 and the ring 1 are quenched respectively, except for the area that cannot be covered by the angled area, the hardness of the outer surface of the rest of the area can be improved by quenching. For the angled area that cannot be covered by high-frequency quenching, the surface hardness of the area is guaranteed by the reinforcing material with higher hardness. This ensures that the hardness of all parts of the guide sleeve surface meets the set requirements and is not easily worn or failed by the disc spring force.

[0044] Increasing the surface hardness of the guide sleeve prevents scratches from the hard disc spring, thus avoiding rapid material loss and preventing the gap between the guide sleeve and the disc spring from widening after wear, which could lead to eccentric movement or uneven loading of the disc spring. It also improves resistance to plastic deformation, making it less prone to yielding in localized areas of the guide sleeve under high disc spring loads, resulting in indentations or dents. Finally, it ensures the geometric accuracy of the guide sleeve, maintaining the disc spring's movement trajectory and preventing jamming.

[0045] In the embodiment, the ring body 1 and the pipe body 2 are arranged separately and fixedly connected by welding, the ring body 1 and the pipe body 2 are formed with a weld at the corner portion, the material forming the weld constitutes a reinforcing material, and the groove is formed at the bevel where the weld is located. Arranging the ring body 1 and the pipe body 2 in a separate form is convenient for manufacturing and saves cost. Before quenching the pipe body 2 and the ring body 1, the hardness of the weld metal is greater than the hardness of the base material of the ring body 1 and the pipe body 2, the hardness of the weld metal at the welding position meets the required surface hardness of the corner portion, the weld metal forms a reinforcing material for improving the hardness, the structure is simple, and manufacturing is convenient. In other embodiments, the ring body and the pipe body can also be arranged in an integrated structure, the ring body and the pipe body are integrally formed, and the groove is directly formed at the corner portion by machining. The welding wire is added in the groove by using a welding machine, the molten metal of the welding wire is used as a reinforcing material for filling the groove, and the metal is filled in the groove by using the welding principle. In other embodiments, laser welding can also be used to fill the metal in the groove by adding the metal wire.

[0046] The weld forming the corner portion is formed by welding between the end face of the pipe body 2 and the corresponding end face of the ring body 1, the end face of the pipe body 2 and the end face of the ring body 1 form a bevel corresponding to the weld, the weld is an annular weld, the outer surface of the weld at the corner portion is flush with the outer peripheral surface of the pipe body 2, the ring body 1 and the pipe body 2 are fixedly connected by butt welding, the weld position makes the weld bear a pressure load rather than a shear load, and this is beneficial to avoid tearing of the weld. The weld connection is used to increase the wear resistance of the surface, and to avoid friction scratches at this position caused by the disc spring reciprocating under different tension and compression forces.

[0047] In the embodiment, the surface of the ring body 1 at the corner portion is relatively small in the influence of the disc spring wear, and the mechanical properties of the ring body 1 itself can meet the requirements, so the surface of the ring body 1 at the corner portion is not reinforced. The surface of the pipe body 2 at the corner portion is relatively large in the influence of the disc spring wear, so in the embodiment, the weld surface is flush with the outer peripheral surface of the pipe body 2, the weld surface is perpendicular to the end face of the ring body 1, and the weld surface is used to resist the wear of the inner edge of the disc spring abutting against the ring body 1. In other embodiments, the outer surface of the weld can also have a part flush with the end face of the ring body and a part flush with the outer peripheral surface of the pipe body.

[0048] The weld at the corner portion of the guide sleeve is an outer weld 3, and an inner weld 4 is also formed at the joint between the inner peripheral surface of the ring body 1 and the inner peripheral surface of the pipe body 2. The inner peripheral surface of the ring body 1 is flush with the outer peripheral surface of the pipe body 2, and the double-sided weld is used to facilitate the guarantee of the welding quality. In other embodiments, only the outer weld can be arranged to guarantee the weld penetration.

[0049] In the embodiment, the outer weld 3 is a J-shaped weld, the inner weld 4 is a V-shaped weld, and the weld structure of the J-shaped weld with a blunt edge and the V-shaped weld can reduce the amount of welding material and ensure the welding quality. In other embodiments, the outer weld can be set as a single-side V-shaped weld, and the inner weld can be set as a U-shaped weld, and the weld shape can be selected according to requirements.

[0050] The depth of the outer weld 3 is greater than the depth of the inner weld 4, which is beneficial to ensure that the outer weld 3 has a surface with a relatively large area, ensure the structural strength, facilitate welding operation, and reduce the amount of welding material. In other embodiments, the depth of the outer weld can be the same as the depth of the inner weld.

[0051] After welding, the size is adjusted to a suitable value by machining. The depth H2 of the V-shaped weld is generally 15% to 20% of the wall thickness of the pipe body 2, and the angle θ is generally 30° to 40°. The width C1 of the J-shaped weld with a blunt edge in the axial direction of the guide sleeve is generally 5 to 12 mm, and the depth H1 of the J-shaped weld is greater than the depth H2 of the V-shaped weld.

[0052] The inner diameter of the ring body 1 is the same as the inner diameter of the pipe body 2, the center hole of the ring body 1 and the center hole of the pipe body 2 are the same diameter and jointly form the center hole of the guide sleeve, the outer diameter of the ring body 1 is 10 to 40 mm larger than the outer diameter of the disc spring matched therewith, the inner diameter of the guide sleeve is 20 to 40 mm larger than the nominal diameter of the bolt or screw inserted into the center hole thereof, the thickness L2 can be 5 to 45 mm, and in the embodiment, L2 is 30 mm. The inner diameter of the pipe body 2 is 77 mm, the outer diameter is 111 mm, the outer diameter of the ring body 1 is 235 mm, the axial size of the pipe body 2 is L3, and the sum of L3 and L2 is 695 mm, i.e. the entire axial length of the guide sleeve. The hardness of the axial end surface of the ring body 1 is not less than 35HRC, and the roughness is not greater than Ra3.2. The length L3 of the pipe body 2 is determined according to the number of disc springs matched therewith, L3 is greater than the total axial height of the disc spring set, and the outer diameter of the pipe body 2 is 1 to 1.5 mm smaller than the inner diameter of the disc spring matched therewith. The outer circular surface hardness of the pipe body 2 is not less than 55HRC, and the roughness is not greater than Ra1.6. The materials of the ring body 1 and the pipe body 2 can be selected from 45 steel and 40Cr.

[0053] The welding material can adopt low-alloy high-strength steel welding material or high-chromium cast iron surfacing material, wherein the wear resistance of the low-alloy high-strength welding material is slightly better than that of the 45 steel base material, and if the high-chromium cast iron surfacing material is adopted, the wear resistance can be consistent with the hardness and wear resistance of the 45 steel surface after quenching. Typical grades of the low-alloy high-strength steel welding material include J607 (E7015-G), which contains Cr, Mo and other elements, has high tensile strength (greater than or equal to 690 MPa), and is better than 45 steel in wear resistance and crack resistance; ER80-D2 (welding wire) contains Mn, Si and Cr, is suitable for gas shielded welding, has good weld toughness and improved wear resistance. Typical grades of the high-chromium cast iron surfacing material include D172 (EDPCrMo-A3-03), which contains 25%-32% Cr, has a hardness of HRC greater than or equal to 55, and is excellent in anti-abrasive wear; and D667 (EDCrNi-C-15), which contains Cr, Ni and Mo, has a hardness of HRC greater than or equal to 48, and is resistant to high-temperature wear. The high-chromium cast iron surfacing material can be preferentially considered.

[0054] Embodiment 2 of the guide sleeve of the utility model:

[0055] The guide sleeve in the embodiment is different from the guide sleeve in the above-mentioned embodiment 1 in the welding seam form, as shown in the figure, Figure 4 the pipe body 2 and the ring body 1 are welded and connected through a single-side V-shaped welding seam 5, the inner circumferential surface of the pipe body 2 is flush with the inner circumferential surface of the ring body 1, the end part of the pipe body 2 is provided with a chamfer, and the chamfer and the end face of the ring body 1 surround a groove, the groove is a groove, and the single-side V-shaped welding seam 5 is formed at the groove, that is, the welding seam of the angle part of the guide sleeve. The welding seam has a large width in the axial direction of the guide sleeve, and the welding can adopt surfacing.

[0056] Embodiment 3 of the guide sleeve of the utility model:

[0057] The guide sleeve in the embodiment is different from the guide sleeve in the above-mentioned embodiment 1 in the cooperation form of the pipe body and the ring body, as shown in the figure, Figure 5 the ring body 1 is sleeved on the end part of the pipe body 2, the inner diameter of the ring body 1 is adapted to the outer diameter of the pipe body 2, the center hole of the pipe body 2 constitutes the center hole of the guide sleeve, the end face of the ring body 1 and the outer circumferential surface of the pipe body 2 form an angle part, and the other end is flush with the corresponding end face of the pipe body 2 and constitutes one end face of the guide sleeve. The ring body 1 is provided with a diameter expansion part at the hole opening of the angle part of the center hole to surround a groove with the outer circumferential surface of the pipe body 2, the groove at the angle part constitutes a groove 7, and the welding seam of the angle part of the guide sleeve is formed at the groove 7, the welding seam is a single-side V-shaped welding seam 5 with a blunt edge, and the welding seam metal constitutes a reinforcing material.

[0058] The annular body 1 and the pipe body 2 are connected by a guide sleeve, and the annular body 1 is provided with a chamfer 6 at the position of the annular body 1 and the guide sleeve, and the chamfer 6 is provided with a V-shaped welding seam.

[0059] The chamfer 7 is provided with a chamfer surface, and the angle between the chamfer surface and the axis of the guide sleeve is 45 degrees.

[0060] The chamfer 7 is provided with a chamfer surface, and the angle between the chamfer surface and the axis of the guide sleeve is 45 degrees.

[0061] The water electrolysis hydrogen production device of the utility model comprises an embodiment:

[0062] The water electrolysis hydrogen production device comprises a fastening assembly, a pressing plate and a polar plate, the fastening assembly is used for fixedly connecting the pressing plates at two ends and the polar plate between the pressing plates at two ends, the fastening assembly comprises a screw rod, a nut and a guide sleeve and a disc spring, the basic component structure is a known technology, and details are not repeated here, the structure of the guide sleeve is same with the structure in any one of the above-mentioned embodiments, and details are not repeated here.

[0063] Finally, it should be noted that the above only for the preferred embodiments of the utility model, and is not used for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can be modified without paying creative labor to the technical scheme recorded in the foregoing each embodiment, or equivalent replacement is carried out to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A guide sleeve, characterized in that The guide sleeve is formed by a ring body and a pipe body, and a groove is arranged at the junction of the outer peripheral surface of the pipe body and the corresponding end surface of the ring body, and the groove is filled with a reinforcing material, the reinforcing material is integrated with the ring body and the pipe body, the surface of the reinforcing material forms part of the outer surface of the guide sleeve, and the material hardness of the reinforcing material meets the required hardness of the junction.

2. The guide bushing of claim 1 wherein, The ring body and the pipe body are separately arranged and welded, and a weld is formed at the junction, the material of the weld forms the reinforcing material, and the groove is formed by the bevel of the weld.

3. The guide bushing of claim 2, wherein, The weld formed between the end surface of the pipe body and the corresponding end surface of the ring body forms the junction, and the surface of the weld is flush with the outer peripheral surface of the pipe body.

4. The guide bushing of claim 3, wherein, The weld of the junction is an outer weld, and an inner weld is further formed at the junction of the inner peripheral surface of the ring body and the inner peripheral surface of the pipe body.

5. The guide bushing of claim 4 wherein, The outer weld is a J-shaped weld, and the inner weld is a V-shaped weld.

6. A guide bush according to claim 4 or 5, characterised in that The depth of the outer weld is greater than that of the inner weld.

7. The guide bushing of claim 3 wherein, The end of the pipe body is provided with a chamfer, and the chamfer and the end surface of the ring body form the groove, and a single-sided V-shaped weld is formed at the groove.

8. The guide bushing of claim 2 wherein, The ring body is sleeved on the end of the pipe body, a diameter expansion part is arranged at the aperture of the ring body at the junction to form the groove with the outer peripheral surface of the pipe body, and the weld of the junction is formed at the groove.

9. The guide bushing of claim 8, wherein, A V-shaped weld is formed between the aperture of the ring body away from the junction and the end of the pipe body.

10. A water electrolysis hydrogen generation apparatus comprising a fastening assembly for fixedly connecting both end pressure plates and electrode plates between the both end pressure plates, characterized by, The fastening assembly comprises a disc spring and the guide sleeve according to any one of claims 1-9.

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