Electrolytic tank and water electrolysis hydrogen production system

Abstract

The utility model provides an electrolytic bath and a water electrolysis hydrogen production system, the electrolytic bath comprises two end pressing plates which are oppositely arranged, and an electrolysis unit is arranged between the two end pressing plates; the pull rods are distributed in the circumferential direction of the end pressing plates, the pull rods are connected with the two end pressing plates, and at least one end of each pull rod penetrates through the corresponding end pressing plate; at least one end, penetrating through the end pressing plates, of the pull rod is provided with a fastening component, the fastening component is used for fastening the end pressing plates, the electrolysis unit, the sealing gasket and other components, so that the electrolysis unit is locked between the two end pressing plates, at least one fastening component comprises a force sensor, and the force sensor is used for detecting the load on the pull rod. In the assembling and running process of the electrolytic bath, an operator can monitor the load change on the pull rod in real time and judge whether the electrolytic bath needs to be tightened and loosened or not according to the load change, so that the good sealing performance of the electrolytic bath is guaranteed, the problems of liquid leakage, gas leakage and the like of the electrolytic bath are solved, and the service life of the electrolytic bath is prolonged. And the service life of the electrolytic bath is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production electrolyzers, in particular to an electrolyzer and a water electrolysis hydrogen production system. Background Art

[0002] The electrolyzer is the core equipment of the water electrolysis hydrogen production system. The performance of the electrolyzer directly affects the hydrogen production quality and efficiency of the entire hydrogen production system. The electrolyzer body mainly includes the pole frame, electrodes, diaphragms, sealing gaskets and end pressure plates. Multiple tie rods are evenly distributed along the outside of the pole frame and pass through the two end pressure plates. During the assembly of the electrolyzer, the tie rods are tightened with nuts on the outside of the end pressure plates, so that multiple electrolytic units in the electrolyzer can be locked on the inside of the two end pressure plates.

[0003] However, current electrolyzers are prone to problems such as uneven assembly, insufficient locking force or excessive locking force during the assembly process, or the sealing gasket of the electrolyzer may creep during long-term use, and the creeping sealing gasket is difficult to rebound, resulting in a continuous decrease in the pre-tightening force between the electrode frames of the electrolyzer. The above problems will lead to a decrease in the sealing performance of the electrolyzer, and then cause the electrolyzer to leak liquid, leak gas and other problems in the subsequent hydrogen production process, seriously affecting the reliability and service life of the electrolyzer. Utility Model Content

[0004] In view of this, the utility model provides an electrolytic cell and a water electrolysis hydrogen production system to at least solve the problem that the locking force of the current electrolytic cell is insufficient or too large, making it difficult to ensure its sealing performance, thereby affecting the reliability and service life of the electrolytic cell.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides an electrolytic cell, comprising:

[0007] Two oppositely disposed end pressure plates, with an electrolysis unit disposed therebetween;

[0008] A plurality of tie rods distributed along the circumference of the end pressure plate, the two ends of the plurality of tie rods are respectively connected to the two end pressure plates, and at least one end of each of the tie rods passes through the corresponding end pressure plate;

[0009] The pull rod passing through at least one end of the end pressure plate is provided with a fastening component, and the fastening component is used to lock the electrolytic unit between the two end pressure plates, wherein at least one of the fastening components includes a force sensor, and the force sensor is used to detect the load on the pull rod.

[0010] Optionally, the at least one fastening component further includes: an elastic member sleeved on the pull rod, and the elastic member is located between the force sensor and the end pressure plate.

[0011] Optionally, the at least one fastening component also includes: a first limiting ring mounted on the pull rod, the first limiting ring being located between the elastic member and the force sensor, and / or a second limiting ring mounted on the pull rod, the second limiting ring being located between the elastic member and the end pressure plate.

[0012] Optionally, the at least one fastening component further includes: a guide tube sleeved on the pull rod, and the elastic member is sleeved on the outer circumferential surface of the guide tube.

[0013] Optionally, under no-load conditions, the projected length of the elastic member in the axial direction of the guide tube is L2, the maximum compression displacement of the elastic member is S, and the length L1 of the guide tube satisfies the following condition: L2-0.8S≤L1.

[0014] Optionally, a limiting groove is provided on the first limiting ring or the second limiting ring, one end of the guide tube is clamped in the limiting groove, the depth of the limiting groove is H1, the projection length of the elastic member in the axial direction of the guide tube under no-load condition is L2, and the length L1 of the guide tube satisfies the following condition: L1≤0.9(L2+H1);

[0015] or,

[0016] The first limiting ring and the second limiting ring are both provided with limiting grooves, and the two ends of the guide tube are respectively clamped in the limiting grooves, and the depths of the two limiting grooves are H2 and H3 respectively. Under no-load conditions, the projection length of the elastic part in the axial direction of the guide tube is L2, and the length L1 of the guide tube satisfies the following condition: L1≤0.9(L2+H2+H3).

[0017] Optionally, the first limiting ring or the second limiting ring is integrally provided with the guide tube.

[0018] Optionally, there are multiple force sensors, and the multiple force sensors are symmetrically arranged about the central axis of the electrolytic cell.

[0019] Optionally, the force sensor is an annular pressure sensor, and the annular pressure sensor is sleeved on the pull rod.

[0020] Optionally, the inner wall of the annular pressure sensor is provided with threads, the outer wall of the pull rod is provided with threads, and the annular pressure sensor is threadedly connected to the pull rod to lock the electrolysis unit between the two end pressure plates.

[0021] Optionally, the at least one fastening component also includes: a nut sleeved on the pull rod, the outer wall of the pull rod is provided with a thread, the nut is threadedly connected to the pull rod, and the force sensor is arranged between the nut and the end pressure plate; or, a bolt head integrally formed with the pull rod, and the force sensor is arranged between the bolt head and the end pressure plate.

[0022] The utility model also provides a water electrolysis hydrogen production system, comprising the electrolytic cell described in any one of the above items.

[0023] Optionally, the system also includes a control unit and an alarm unit; the control unit is electrically connected to the force sensor and the alarm unit respectively, and the control unit is used to obtain the load detected by the force sensor and control the alarm unit to alarm when the load is not within a preset load range.

[0024] Compared with the prior art, the electrolyzer and water electrolysis hydrogen production system described in the utility model have the following advantages:

[0025] The electrolytic cell of the utility model comprises two oppositely arranged end pressure plates, between which an electrolytic unit is arranged; a plurality of tie rods distributed along the circumference of the end pressure plates, the plurality of tie rods are connected to the two end pressure plates, at least one end of each tie rod passes through the corresponding end pressure plate; at least one end of the tie rod passing through the end pressure plate is provided with a fastening component, the fastening component is used to fasten the end pressure plate, the overlapping electrolytic units and sealing gaskets and other components, so as to lock the electrolytic unit between the two end pressure plates, at least one of the fastening components comprises a force sensor, and the force sensor is used to detect the load on the tie rod. Thus, during the assembly and operation of the electrolytic cell, the operator can monitor the load changes on the tie rod in real time, and judge whether it is necessary to tighten or loosen the electrolytic cell according to the load changes, so as to ensure the good sealing performance of the electrolytic cell, avoid leakage, gas leakage and other problems in the subsequent operation of the electrolytic cell, thereby improving the reliability and service life of the electrolytic cell.

[0026] The water electrolysis hydrogen production system of the present invention has the same or similar advantages as the prior art and the aforementioned electrolyzer, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0028] Figure 1 It is a cross-sectional schematic diagram of an electrolytic cell in an embodiment of the utility model;

[0029] Figure 2 is a schematic diagram of an annular pressure sensor in an embodiment of the utility model;

[0030] Figure 3 In the present utility model embodiment Figure 2 A schematic cross-sectional view taken along direction A;

[0031] Figure 4 It is a schematic diagram of the first fastening component in the embodiment of the utility model;

[0032] Figure 5 yes Figure 4 Exploded diagram of the middle structure;

[0033] Figure 6 is a schematic diagram of a second fastening component in an embodiment of the utility model;

[0034] Figure 7 is a schematic diagram of a third fastening component in an embodiment of the utility model;

[0035] Figure 8 is a schematic diagram of a fourth fastening component in an embodiment of the utility model;

[0036] Fig. 9 is a schematic diagram of a fifth fastening component in an embodiment of the utility model;

[0037] Fig.10 yes Fig. 9 Exploded diagram of the middle structure;

[0038] Fig.11 It is a schematic diagram of the sixth fastening component in the embodiment of the utility model.

[0039] Description of reference numerals:

[0040] 1-end pressure plate, 2-pull rod, 21-bolt head, 3-force sensor, 301-inner wall, 4-nut, 5-elastic member, 61-first limiting ring, 62-second limiting ring, 61a, 62a-limiting grooves, 7-guide tube, 8-insulating gasket, 9-electrolysis unit. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0043] It should be understood that the reference to "some embodiments" throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the utility model. Therefore, the "in some embodiments" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0044] The following describes in detail an electrolyzer and a water electrolysis hydrogen production system provided by the utility model by listing specific embodiments.

[0045] Reference Figure 1 The utility model embodiment provides an electrolytic cell, comprising two oppositely arranged end pressure plates 1, a plurality of tie rods 2 and a fastening component; a plurality of electrolytic units 9 are arranged between the two end pressure plates 1, and the chemical reaction of electrolyzing water is completed in the plurality of electrolytic units 9; the plurality of tie rods 2 are distributed along the circumference of the end pressure plates, and the two ends of the plurality of tie rods 2 are respectively connected to the two end pressure plates 1, and at least one end of each of the tie rods 2 passes through the corresponding end pressure plate 1; the fastening component is arranged at the end of the tie rod 2 passing through the end pressure plate 1, and is used to fasten the overlapping pole frames and sealing gaskets and other components, so as to lock the electrolytic unit between the two end pressure plates to ensure the sealing of the electrolytic cell and avoid leakage or gas leakage; wherein, at least one of the fastening components includes a force sensor 3, and the force sensor 3 is used to detect the load on the tie rod 2.

[0046] Specifically, the tie rod 2 may pass through any one of the two end pressure plates 1, or may pass through both end pressure plates 1 at the same time. If the tie rod 2 only passes through any one of the two end pressure plates 1, the end of the tie rod 2 that does not pass through the end pressure plate 1 may be fixedly connected to the end pressure plate 1 by screwing, clamping, welding, etc., and the other end of the tie rod 2 that passes through the end pressure plate 1 is provided with the fastening component. If both ends of the tie rod 2 pass through the two end pressure plates 1 respectively, both ends of the tie rod 2 are provided with the fastening components.

[0047] During the assembly process, the pull rod and fastening components need to provide a suitable load to compress the sealing gasket in the electrolytic unit 9 to achieve the initial sealing of the electrolytic cell. If the load is too small, it will not be able to seal; if the load is too large, it will cause the sealing gasket to be over-pressurized, which will greatly reduce the service life of the sealing gasket and may damage other components; if the load is loaded too quickly, it is easy to cause local stress concentration on the sealing gasket and uneven assembly, so controlling the load loading during the assembly stage is one of the core processes. In addition, during the long-term operation of the electrolytic cell body, the sealing gasket will creep, and the creeping sealing gasket is difficult to rebound and recover, resulting in a continuous decrease in the preload force between the electrolytic cell pole frames. When the preload force is less than the minimum preload force required for the electrolytic cell seal, the electrolytic cell may leak liquid or gas.

[0048] To this end, in this embodiment, at least one of the fastening components includes a force sensor 3, and the force sensor 3 is used to detect the load on the pull rod 2. In this embodiment, a force sensor 3 is provided on each pull rod 2. In other embodiments, two or more force sensors 3 can also be provided on each pull rod 2. The stability of the system test is improved by redundant design, such as providing a force sensor 3 at both ends of each pull rod 2. During the assembly and operation of the electrolytic cell, the operator can monitor the load changes on the pull rod 2 in real time, and determine whether it is necessary to tighten or loosen the electrolytic cell according to the load changes, so as to ensure the good sealing performance of the electrolytic cell, avoid leakage, gas leakage and other problems in the subsequent operation of the electrolytic cell, thereby improving the reliability and service life of the electrolytic cell.

[0049] In the embodiment of the utility model, the force sensor 3 can be any one of a piezoresistive pressure sensor, a capacitive pressure sensor, an electronic pressure sensor, an electromagnetic pressure sensor, and a piezoelectric sensor, which can meet the detection requirements of the load on the pull rod 2. The pressure detection range of the force sensor 3 can be 50N to 100000KN, which can meet the load detection requirements of the pull rod 2 in most electrolytic cells. The force sensor 3 can also be any shape such as round, square, conical, etc., as long as it can be set on the pull rod 2 and perform normal load detection.

[0050] Optionally, there are multiple force sensors 3, and multiple force sensors 3 are arranged on the tie rods 2 that are spaced apart circumferentially along the end pressure plate 1. In this way, the number of force sensors 3 used can be reduced while ensuring the accuracy of load monitoring, thereby saving costs. Specifically, the number of tie rods 2 spaced apart between two adjacent force sensors 3 can be one, two, or more, and is specifically set according to the number of tie rods 2, which is not limited in this embodiment. In addition, the number of tie rods 2 spaced apart between two adjacent force sensors 3 is preferably the same. For example, if the number of tie rods 2 is 10, numbered 1 to 10 in sequence, the force sensors 3 can be connected to tie rods 2 numbered 1, 3, 5, 7, and 9.

[0051] In other embodiments, a plurality of the force sensors 3 are symmetrically arranged about the central axis of the electrolytic cell, which can more accurately measure the circumferential load distribution of the electrolytic cell, and facilitate monitoring and adjustment of local loads, thereby avoiding problems such as local stress concentration and uneven assembly of sealing gaskets.

[0052] Optionally, refer to Figures 1 to 3 In order to facilitate the installation and fixation of the force sensor, the force sensor 3 is an annular pressure sensor, and the annular pressure sensor is sleeved on the pull rod 2.

[0053] Specifically, the structure of the force sensor 3 is as follows: Figure 2 As shown, Figure 3 : is a cross-sectional schematic diagram of the force sensor 3. The interior of the force sensor 3 is hollow and can be directly mounted on the tie rod 2, which is more convenient for connection and fixation with the tie rod 2. In some embodiments, the force sensor 3 can be a spoke-type force sensor. When the load on the tie rod 2 acts on the spoke, the spoke will bend and deform to produce strain. The strain is measured by a strain gauge attached to the spoke. When the strain gauge is subjected to strain, its resistance value changes. The strain value can be determined by measuring the change in resistance value. The strain value can be converted to obtain the load value on the tie rod 2.

[0054] Optionally, refer to Figure 2 , Figure 3 and Fig.11 The inner wall 301 of the force sensor 3 is provided with a thread, and the outer wall of the pull rod 2 is provided with a thread. The force sensor 3 is threadedly connected to the pull rod 2 to lock the electrolytic unit between the two end pressure plates.

[0055] Specifically, the inner wall 301 of the force sensor 3 refers to the circumferential surface of the hollow portion of the force sensor 3. The pull rod 2 has an outer wall arranged around its axis direction, and a thread is arranged on the outer wall. The inner wall 301 of the force sensor 3 contacts the outer wall of the pull rod 2. Fig.11As shown, the inner wall 301 of the force sensor 3 is provided with a thread, which is screwed with the thread on the outer wall of the pull rod 2, so as to fasten the overlapping pole frames and sealing gaskets and other components. In this embodiment, the force sensor 3 with a thread on the inner wall 301 is selected, so that the force sensor 3 can directly act as a nut 4 to fasten the electrolytic cell, eliminating the use of the nut 4, reducing the number of components of the electrolytic cell, helping to simplify the fastening components and reduce the overall cost of the electrolytic cell.

[0056] Optionally, in some embodiments, referring to Figure 4 The fastening component further includes: a bolt head 21 integrally formed with the pull rod 2 , and the force sensor 3 is arranged between the bolt head 21 and the end pressure plate 1 .

[0057] In other embodiments, reference Figures 6 to 8 The fastening component also includes: a nut 4, which is sleeved on the pull rod 2, the outer wall of the pull rod 2 is provided with a thread, the nut 4 is threadedly connected to the pull rod 2, and the force sensor 3 is arranged between the nut 4 and the end pressure plate 1.

[0058] Specifically, the inner wall 301 of the force sensor 3 is smooth and has no threads on its surface.

[0059] The fixing part also includes a bolt head 21 integrally formed with the pull rod 2, and the force sensor 3 is arranged between the bolt head 21 and the end pressure plate 1. Alternatively, the fastening part also includes a nut 4, which is sleeved on the pull rod 2 and screwed with the thread on the outer wall of the pull rod 2, and the force sensor 3 is arranged between the nut 4 and the end pressure plate 1. Among them, the strain surface of the force sensor 3 can be set toward the bolt head 21 or the nut 4, and can also be set toward the end pressure plate 1, and both can realize the load measurement on the pull rod 2.

[0060] Of course, when the electrolytic cell uses a force sensor 3 with a threaded inner wall 301, a bolt head 21 integrally formed with the pull rod 2 can be provided on the pull rod 2 or a nut 4 can be provided on the pull rod 2 to achieve double tightening using the bolt head 21 or the nut 4 to ensure the reliability of the electrolytic cell sealing.

[0061] Optionally, refer to Figure 4 , Figures 6 to 9 The fastening component also includes: an insulating gasket 8, which is sleeved on the pull rod 2, and the insulating gasket 8 is located between the end pressure plate 1 and the force sensor 3, and is arranged in contact with the surface of the end pressure plate 1.

[0062] Specifically, the insulating gasket 8 is arranged to fit the surface of the end pressure plate 1 to achieve electrical insulation between the end pressure plate 1 and the fastening component, especially when the force sensor 3 is arranged, to prevent the current leakage of the electrolytic cell body from interfering with the measurement accuracy of the force sensor 3. The insulating gasket 8 can be made of glass fiber reinforced resin, rubber, etc.

[0063] Optionally, refer to Figures 6 to 8 The fastening component also includes: an elastic member 5, which is sleeved on the pull rod 2, and the elastic member 5 is located between the force sensor 3 and the end pressure plate 1. The stiffness of the elastic member 5 can be adjusted to play a role in adjusting the load.

[0064] Specifically, the elastic member 5 can be a disc spring, a diaphragm spring or a wave spring, wherein the disc spring includes but is not limited to a slotted disc spring, a circular disc spring, a spiral disc spring, and the disc spring structure can be a disc spring without a supporting surface, a disc spring with a supporting surface, etc. In addition, if Figure 6 As shown, the force sensor 3 can be arranged on the side of the elastic member 5 away from the end pressure plate 1, such as Figure 7 As shown, the force sensor 3 can also be arranged between the elastic members 5, such as Figure 8 As shown, the force sensor 3 can also be arranged on a side of the elastic member 5 close to the end pressure plate 1 , which can detect the load on the pull rod 2 .

[0065] Optionally, refer to Figures 4 to 11 The fastening component also includes: a first limiting ring 61 and a second limiting ring 62 which are sleeved on the pull rod 2, the first limiting ring 61 is located between the elastic member 5 and the force sensor 3, and the second limiting ring 62 is located between the elastic member 5 and the end pressure plate 1.

[0066] Specifically, the first limiting ring 61 and the second limiting ring 62 can be the same product or different products. If the limiting ring is placed between the elastic member 5 and the force sensor 3, it is called the first limiting ring 61. If the limiting ring is placed between the elastic member 5 and the end pressure plate 1, it is called the second limiting ring 62. The fastening component can include only the first limiting ring 61, only the second limiting ring 62, or both the first limiting ring 61 and the second limiting ring 62. Figures 4 to 11 The schematic diagrams of the fastening component including two limiting rings are shown, and the two limiting rings can play a better guiding role for the elastic member 5, so that the elastic member 5 maintains a good deformation ability. Of course, if one limiting ring is used, it is more helpful to control the processing cost and overall weight of the fastening component.

[0067] Optionally, refer to Figures 4 to 11 The fastening component further includes: a guide tube 7, which is sleeved on the pull rod 2, and the elastic member 5 is sleeved on the outer circumferential surface of the guide tube 7.

[0068] The first limiting ring 61, the second limiting ring 62, and / or the guide tube 7 are used to ensure the installation coaxiality of the multiple sets of the elastic members 5 and the pull rod 2. In addition, the first limiting ring 61 and the second limiting ring 62 can also bear part of the load and work together with the elastic member 5 to absorb and disperse the force generated by vibration or impact, thereby improving the measurement stability and accuracy of the force sensor 3.

[0069] Specifically, refer to Figure 4 and Figure 5 , the projected length of the elastic member in the axial direction of the guide tube 7 under no-load conditions is L2, the maximum compression displacement of the elastic member is S, and the length L1 of the guide tube satisfies the following condition: L2-0.8S≤L1. Among them, the projected length of the elastic member in the axial direction of the guide tube 7 under no-load conditions refers to: the natural length of the elastic member in the axial direction of the guide tube 7 when no external force is applied. When the length L1 of the guide tube satisfies the above relationship, it can ensure that the elastic member 5 can reach the set deformation degree while not failing due to excessive compression and failing to adjust the load.

[0070] Optionally, in the first embodiment, a limiting groove is provided on the first limiting ring 61 or the second limiting ring 62. In the embodiment of the utility model, the limiting groove provided on the first limiting ring 61 is referred to as the limiting groove 61a, and the limiting groove provided on the second limiting ring 62 is referred to as the limiting groove 62a. It should be noted that the size specifications and shape structures of the limiting groove 61a and the limiting groove 62a may be the same or different, and this embodiment does not impose any limitation on this. Figure 4 and Figure 5 FIG. 4 shows a schematic diagram of a second limiting ring 62 provided with a limiting groove 62a. Figure 5 As shown, the depth of the upper limit groove 62a on the second limit ring 62 is H1, one end of the guide tube 7 is clamped in the limit groove 62a, and the other end is abutted against the first limit ring 61. Under no-load conditions, the projected length of the elastic member 5 in the axial direction of the guide tube 7 is L2, and the length L1 of the guide tube 7 satisfies the following condition: L1≤0.9(L2+H1).

[0071] Alternatively, in the second embodiment, both the first limiting ring 61 and the second limiting ring 62 are provided with limiting grooves. Fig. 9 and Fig.10 FIG. 6 is a schematic diagram showing that both the first limiting ring 61 and the second limiting ring 62 are provided with limiting grooves. Fig.10As shown, the depth of the upper limit groove 61a of the first limit ring 61 is H2, the depth of the upper limit groove 62a of the second limit ring 62 is H3, one end of the guide tube 7 is clamped in the limit groove 61a, and the other end is clamped in the limit groove 62a. Under no-load conditions, the projection length of the elastic member 5 in the axial direction of the guide tube 7 is L2, and the length L1 of the guide tube 7 meets the following conditions: L1≤0.9(L2+H2+H3).

[0072] Furthermore, in the present embodiment, the first limiting ring 61 and the second limiting ring 62 may also be of the same product, that is, the depth H2 of the limiting groove 61a is the same as the depth H3 of the limiting groove 62a. During installation, the first limiting ring 61 is installed at the end of the guide tube 7 away from the end pressure plate 1, and the limiting groove 61a of the first limiting ring 61 is set toward the elastic member 5, and the end of the guide tube 7 can be snapped into the limiting groove 61a. The second limiting ring 62 is installed at the end of the guide tube 7 close to the end pressure plate 1, and the limiting groove 62a of the second limiting ring 62 is set toward the elastic member 5, and the end of the guide tube 7 can be snapped into the limiting groove 62a.

[0073] In addition, if the second limiting ring 62 in the first embodiment and the second embodiment above adopts the same product, the depth H1 and H3 of the limiting groove 62a are the same. If the second limiting ring 62 adopts different products, the depth H1 and H3 of the limiting groove 62a may be different. It can be specifically set according to the connection requirements of the guide tube 7, and this is not limited in this embodiment. The limiting groove 6a can better limit the guide tube 7, and even if the guide tube 7 is displaced in the axial direction of the pull rod 2, the installation coaxiality of the multiple groups of the elastic members 5 and the pull rod 2 can be guaranteed. In addition, the above-mentioned dimensional relationship enables the elastic member 5 to reach the set deformation degree, thereby providing a load sufficient to achieve the sealing of the electrolytic cell. That is to say, when L1>0.9(L2+H2+H3), the deformation degree of the elastic member 5 is not enough to provide the load required to achieve the sealing of the electrolytic cell. It should be noted that the depths H1, H2 and H3 of the limiting grooves 61a and 62a are not greater than the thickness of the corresponding limiting ring in the axial direction of the guide tube 7. As a possible implementation, the depth of the limiting groove is the same as the thickness of the corresponding limiting ring in the axial direction of the guide tube 7. Figure 6-8 In the embodiment shown in FIG. 11 , the limiting groove 61 a penetrates the first limiting ring 61 in the axial direction of the guide tube 7 , that is, the depth H2 of the limiting groove 61 a is the same as the thickness of the first limiting ring 61 in the axial direction of the guide tube 7 .

[0074] Optionally, the first limiting ring 61 or the second limiting ring 62 can be integrally provided with the guide tube 7, so as to further improve the stability and accuracy of the guide and limiting. In this case, the length of the guide tube 7 is deemed not to include the thickness of the first limiting ring 61 or the second limiting ring 62 integrally formed therewith in the axial direction of the guide tube 7.

[0075] An embodiment of the utility model further provides a water electrolysis hydrogen production system, comprising any of the aforementioned electrolytic cells.

[0076] Specifically, the water electrolysis hydrogen production system includes the electrolyzer of any of the aforementioned embodiments, and the water electrolysis hydrogen production system includes but is not limited to an alkaline water electrolysis hydrogen production (AWE) system, a proton exchange membrane (PEM) water electrolysis hydrogen production system, a solid polymer anion exchange membrane (AEM) water electrolysis hydrogen production system, etc. The water electrolysis hydrogen production system adopts the electrolyzer of any of the aforementioned embodiments. During the assembly and operation of the electrolyzer, the operator can monitor the load changes on the pull rod in real time, and determine whether it is necessary to tighten or loosen the electrolyzer according to the load changes, so as to ensure that the sealing performance of the electrolyzer is good, thereby improving the working stability of the water electrolysis hydrogen production system.

[0077] Optionally, the system further includes a control unit and an alarm unit; the control unit is electrically connected to the force sensor 3 and the alarm unit respectively, and the control unit is used to obtain the load detected by the force sensor 3, and control the alarm unit to alarm when the load is not within a preset load range. The preset load range can be set according to actual needs, and the preset load pressure range corresponding to different electrolytic cells may be different, which is not limited by the embodiment of the utility model.

[0078] Specifically, the control unit includes a processor, an actuator, a memory, a human-computer interaction interface, etc. The control unit is used to control the operation of the electrolytic cell. The control unit is electrically connected to the force sensor 3 and the alarm unit, respectively, and can obtain the load on the pull rod 2 detected by the force sensor 3, and control the alarm unit to alarm when the load is not within a preset load range. The alarm unit includes but is not limited to indicator lights, speakers, display screens, etc. In some embodiments, the control unit includes a display screen. When the electrolytic cell is assembled, the preload force directly acts on the force sensor, and the corresponding preload force is displayed on the display screen to monitor the assembly process; when the electrolytic cell is operating normally, the temperature stress generated by the heating and cooling processes and the load changes caused by system fluctuations will also be displayed on the display screen, which can be used to monitor system fluctuations.

[0079] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrolytic cell, characterized in that: include: Two oppositely disposed end pressure plates, with an electrolysis unit disposed therebetween; A plurality of tie rods distributed along the circumference of the end pressure plate, the two ends of the plurality of tie rods are respectively connected to the two end pressure plates, and at least one end of each of the tie rods passes through the corresponding end pressure plate; A fastening component is provided at at least one end of the pull rod passing through the end pressure plate, and the fastening component is used to lock the electrolytic unit between the two end pressure plates, wherein at least one of the fastening components includes a force sensor, and the force sensor is used to detect the load on the pull rod.

2. The electrolytic cell according to claim 1, characterized in that The at least one fastening component further comprises: An elastic member is sleeved on the pull rod, and the elastic member is located between the force sensor and the end pressure plate.

3. The electrolytic cell according to claim 2, characterized in that The at least one fastening component further comprises: A first limiting ring sleeved on the pull rod, wherein the first limiting ring is located between the elastic member and the force sensor, and / or a second limiting ring sleeved on the pull rod, wherein the second limiting ring is located between the elastic member and the end pressure plate.

4. The electrolytic cell according to claim 3, characterized in that The at least one fastening component further comprises: A guide tube is sleeved on the pull rod, and the elastic member is sleeved on the outer peripheral surface of the guide tube.

5. The electrolytic cell according to claim 4, characterized in that Under no-load conditions, the projected length of the elastic member in the axial direction of the guide tube is L2, and the maximum compression displacement of the elastic member is S. The length L1 of the guide tube satisfies the following conditions: L2-0.8S≤L1.

6. The electrolytic cell according to claim 4, characterized in that A limiting groove is provided on the first limiting ring or the second limiting ring, one end of the guide tube is clamped in the limiting groove, the depth of the limiting groove is H1, the projection length of the elastic member in the axial direction of the guide tube under no-load condition is L2, and the length L1 of the guide tube meets the following conditions: L1≤0.9(L2+H1); or, The first limiting ring and the second limiting ring are both provided with limiting grooves, and the two ends of the guide tube are respectively clamped in the limiting grooves, and the depths of the two limiting grooves are H2 and H3 respectively. The projection length of the elastic member in the axial direction of the guide tube under no-load conditions is L2, and the length L1 of the guide tube meets the following conditions: L1≤0.9(L2+H2+H3).

7. The electrolytic cell according to any one of claims 4 to 6, characterized in that: The first limiting ring or the second limiting ring is integrally arranged with the guide tube.

8. The electrolytic cell according to any one of claims 1 to 6, characterized in that: There are multiple force sensors, and the multiple force sensors are symmetrically arranged about the central axis of the electrolytic cell.

9. The electrolytic cell according to any one of claims 1 to 6, characterized in that: The force sensor is an annular pressure sensor, and the annular pressure sensor is sleeved on the pull rod.

10. The electrolytic cell according to claim 9, characterized in that The inner wall of the annular pressure sensor is provided with a thread, the outer wall of the pull rod is provided with a thread, and the annular pressure sensor is threadedly connected to the pull rod to lock the electrolytic unit between the two end pressure plates.

11. The electrolytic cell according to any one of claims 1 to 6, characterized in that: The at least one fastening component further comprises: A nut is sleeved on the pull rod, the outer wall of the pull rod is provided with a thread, the nut is threadedly connected to the pull rod, and the force sensor is arranged between the nut and the end pressure plate; or, a bolt head is integrally formed with the pull rod, and the force sensor is arranged between the bolt head and the end pressure plate.

12. A water electrolysis hydrogen production system, characterized in that: An electrolytic cell comprising any one of claims 1 to 11.

13. The water electrolysis hydrogen production system according to claim 12, characterized in that: The system also includes a control unit and an alarm unit; The control unit is electrically connected to the force sensor and the alarm unit respectively, and is used to obtain the load detected by the force sensor and control the alarm unit to sound an alarm when the load is not within a preset load range.

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