Pressure detection device for hydrogen refueling station

Abstract

The utility model relates to the field of pressure detection, in particular to a pressure detection device for a hydrogen refueling station, which comprises a mounting seat, a glass protective cover, a hydrogen sensing alarm, a barometer, a sealing mechanism and a rotary positioning mechanism, and the rotary positioning mechanism comprises a locking assembly and a positioning assembly. During installation, the threaded installation pipe and the barometer are driven to be connected with the installation screw cylinder through threads, the lower end of the threaded installation pipe extrudes the sealing mechanism, sealing is carried out in the installation screw cylinder, sealing is tighter, after installation is completed, the locking assembly is loosened, rotation of the threaded installation pipe is locked through the locking assembly, and the threaded installation pipe cannot rotate automatically and is more stable. The threaded mounting pipe cannot automatically rotate and loosen through the locking assembly, the sealing stability is guaranteed, meanwhile, the sealing effect is improved through the sealing mechanism, and the use safety of the device is improved; the problems that an existing pressure detection device for the hydrogen refueling station is poor in extrusion and attachment effect, sealing is prone to failure, and gas leakage is prone to occurring are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure detection devices, and in particular relates to a pressure detection device for a hydrogen filling station. Background Art

[0002] Hydrogen is the lightest gas known in the world. Its density is very small, only 1 / 14 of that of air, that is, at standard atmospheric pressure of 0°C, the density of hydrogen is 0.0899g / L. As a clean fuel, the main methods of producing hydrogen at present include: reaction of active metals with acids, electrolysis of water, water gas method, decomposition of water by efficient catalysts, and decomposition of methane at high temperatures. At the same time, hydrogen is a flammable gas, and after combustion, it will produce gaseous water, and will not emit harmful gases. At the same time, its density is less than that of air, and it can be used as a fuel for combustion or as a floating filling gas. It is also a new type of chemical preparation raw material, which is widely used in the fields of green hydrogen industry, hydrogen fuel cells, etc.

[0003] As a kind of infrastructure that provides internal combustion engine power to hydrogen-powered vehicles, hydrogen refueling stations usually use membrane compressors to pressurize hydrogen when pressurizing hydrogen-powered vehicles to ensure the pressurization pressure so that it can be filled into the on-board hydrogen storage bottle of the fuel cell vehicle at a certain pressure. Therefore, in order to ensure the pressurization pressure when hydrogenating the vehicle, it is often necessary to set up multiple pressure detection devices on the hydrogen delivery pipeline of the hydrogen refueling station to detect the gas pressure in the pipeline in real time, so as to perform real-time feedback adjustment and ensure the pressurization effect of the terminal. After searching: Chinese patent with publication number CN220289566U discloses a hydrogen leakage detection device, which detects the accurate hydrogen concentration by setting the hydrogen leakage detection unit at the outlet end arranged along the transverse direction to avoid the influence of hydrogen density, so as to judge whether hydrogen is leaking by gas concentration, but the device cannot effectively measure the air pressure in the pipeline and realize the role of negative feedback regulation by the air pressure in the pipeline. A Chinese patent with publication number CN110542017B discloses a pressure detection device for a hydrogen refueling station. The device drives the clamping block to move downward by contracting the telescopic cylinder, thereby clamping the support plate. The pressure detection instrument is fixed in the above manner, which is convenient for replacing the pressure detection instrument. The connection position between the pressure detection instrument and the instrument mounting seat can be sealed to a certain extent by the sealing cover. When hydrogen leaks, the hydrogen leak can be captured in time by the hydrogen sensor, and the hydrogen pressure can be checked to determine whether a leak occurs. However, when the device is in use, the following problems still exist: 1. The extrusion-fitting effect of the rubber pad set at the lower end of the support plate for sealing is poor, and there is a gap between the rubber sealing pad and the seal, which makes the seal easily fail and there is a risk of leakage, and it is impossible to accurately and effectively complete the pressure detection in the hydrogen pipeline; 2. The pressure detection instrument is a dynamic detection device. When it is fixed by a cylinder for detection, the cylinder pressure cannot be changed in real time according to the hydrogen pressure in the pipeline. Therefore, the fixing effect is poor, and it cannot be continuously applied to the fixation of the pressure detector under dynamically changing hydrogen pressure. In addition, the cylinder cost is high, and it needs to be connected to compressed air at all times for pressure replenishment. It is troublesome to use and has poor structural stability.

[0004] Therefore, the utility model designs a pressure detection device for a hydrogen refueling station to solve the problems existing in the above-mentioned background technology. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a pressure detection device for a hydrogen refueling station, which has the advantages of stable connection, low cost, good sealing effect, and easy disassembly. It solves the problems existing in the existing pressure detection device for a hydrogen refueling station, such as a rubber pad being set at the lower end of a support plate for sealing, poor extrusion and fitting effect, gaps being generated between the rubber sealing pad, easy failure of the seal, and the risk of air leakage.

[0007] (II) Technical solution

[0008] In order to achieve the purpose of the pressure detection device for the above-mentioned hydrogen refueling station, the utility model provides the following technical solutions:

[0009] A pressure detection device for a hydrogen refueling station includes: a mounting seat, which is compatible with a hydrogen delivery pipeline, and a mounting barrel is arranged in the mounting seat to be compatible with a detection port opened on the hydrogen delivery pipeline; a glass protection cover is arranged at the upper end of the mounting seat, and a hydrogen sensor alarm is arranged on the glass protection cover; a barometer is arranged in the glass protection cover and connected to the mounting barrel through a threaded mounting tube; a sealing mechanism is arranged on one side of the mounting barrel and is compatible with the threaded mounting tube; a rotation positioning mechanism is arranged on one side of the threaded mounting tube, including a locking component arranged on one side of the threaded mounting tube and a positioning component arranged on the upper side of the mounting seat.

[0010] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: the sealing mechanism includes a mounting step fixedly connected to the inner wall of the mounting barrel, the inner wall of the mounting barrel is slidably connected with a bottom sealing ring, the inner wall of the mounting step is fitted with the bottom sealing ring, and a side sealing ring is integrally formed with the upper end of the bottom sealing ring, the distance between the circumferential surface of the side sealing ring and the circumferential inner wall of the mounting barrel is less than the thickness of the threaded mounting tube, and the circumferential inner wall of the side sealing ring is fitted with the mounting step.

[0011] Based on the above technical features: the connection between the threaded installation tube and the installation screw barrel can be tightly sealed through the sealing mechanism to ensure the sealing effect and reduce air leakage.

[0012] As a preferred solution of the pressure detection device for a hydrogen filling station described in the utility model: a plastic shaping ring is fixedly connected to the inner wall of the circumference of the side sealing ring, and the lower end of the plastic shaping ring fits in the upper end of the installation step.

[0013] Based on the above technical features: the bottom sealing ring and the side sealing ring can be supported and formed by the plastic shaping ring to prevent deformation and difficulty in fitting when inserted, and to prevent incorrect installation and air leakage.

[0014] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: the locking assembly includes a hexagonal ring fixedly connected to the circumferential surface of the threaded mounting tube, a mounting block is fixedly connected to the upper end of the mounting seat, a first spring is fixedly connected to the side end of the mounting block, one end of the first spring is fixedly connected to a fitting block, and the inner wall of the fitting block fits the surface of the hexagonal ring.

[0015] Based on the above technical features: the locking component can prevent the threaded installation tube from rotating after installation, making it more stable and preventing air leakage caused by loosening after long-term use.

[0016] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: a "C"-shaped pull rod is slidably connected to the inner wall of the mounting block, one end of the pull rod is fixedly connected to the fitting block, and the first spring is sleeved on the circumferential surface of the pull rod.

[0017] Based on the above technical features: the first spring can be supported by the pull rod to prevent lateral elastic deformation and damage during the expansion and contraction of the first spring.

[0018] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: a slide bar is fixedly connected to the upper end of the installation block, and a blocking block is slidably connected to the surface of the slide bar.

[0019] Based on the above technical features: the blocking block can be used to block the resetting of the fitting block, making it convenient for people to rotate the threaded installation tube.

[0020] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: the positioning component includes a stepped hole opened at the upper end of the hexagonal ring, and a lifting rod is slidably connected to the inner wall of the stepped hole.

[0021] Based on the above technical features: the positioning component can be used to remind people of the installation depth to prevent excessive downward pressure on the installation, which may cause the sealing mechanism to be squeezed and crushed, resulting in loss of sealing.

[0022] As a preferred solution of the pressure detection device for a hydrogen refueling station described in the utility model: a second spring is fixedly connected to the surface of the stepped hole, and the lower end of the second spring is fixedly connected to the lifting rod.

[0023] Based on the above technical features: the lifting rod can be continuously pulled by the second spring, so that the lifting rod can be more accurate in indicating the installation depth.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the utility model provides a pressure detection device for a hydrogen refueling station, which has the following beneficial effects:

[0026] 1. During installation, the threaded installation tube and the pressure gauge are connected to the installation screw barrel through the threaded connection. The lower end of the threaded installation tube squeezes the sealing mechanism, and the installation screw barrel is sealed inside, so the seal is tighter. When the installation is completed, the locking component is released. At this time, the locking component locks the rotation of the threaded installation tube, so that the threaded installation tube will not rotate by itself, which is more stable. The locking component prevents the threaded installation tube from rotating and loosening by itself, ensuring the sealing stability. At the same time, the sealing mechanism increases the sealing effect, increases the safety of the device, and ensures the accuracy of hydrogen pressure detection in the hydrogen pipeline, and improves the sensitivity of the negative feedback regulation process;

[0027] 2. When the first spring pushes the fitting block to fit the surface of the hexagonal ring for fixation, the first spring is prone to elastic deformation and damage during the expansion and contraction process. The first spring can be supported by the pull rod to prevent lateral elastic deformation and damage during the expansion and contraction of the first spring, thereby ensuring the convenience of installing the pressure gauge and the stability of the pressure gauge after installation, and the installation and adjustment process are simple and convenient; it solves the problems of the existing pressure detection device for hydrogen refueling stations, such as the rubber pad being set at the lower end of the support plate for sealing, poor extrusion and fitting effect, gaps with the rubber sealing pad, easy failure of the seal, and the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an installation effect diagram of the pressure detection device for hydrogen refueling station of the utility model;

[0029] Figure 2 It is a sectional perspective view of the pressure detection device for a hydrogen refueling station of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the pressure detection device for hydrogen refueling station without a glass protective cover;

[0031] Figure 4 This is a partial enlarged view of the pressure detection device for hydrogen refueling station of the utility model at position A;

[0032] Figure 5 This is a partial enlarged view of the pressure detection device for hydrogen refueling station of the utility model at position B;

[0033] Figure 6 It is a partial enlarged view of the pressure detection device C for hydrogen refueling station of the utility model.

[0034] In the figure: 1. mounting base; 2. glass protective cover; 3. hydrogen sensor alarm; 4. pressure gauge; 5. mounting screw; 6. sealing mechanism; 601. mounting step; 602. bottom sealing ring; 603. shaping ring; 604. side sealing ring; 7. threaded mounting tube; 8. rotation positioning mechanism; 801. locking assembly; 8011. hexagonal ring; 8012. fitting block; 8013. first spring; 8014. pull rod; 8015. mounting block; 8016. sliding rod; 8017. blocking block; 802. positioning assembly; 8021. stepped hole; 8022. lifting rod; 8023. second spring. DETAILED DESCRIPTION

[0035] 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 only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0036] Example 1: Please refer to Figure 1-6 As shown, the utility model provides a technical solution: a pressure detection device for a hydrogen refueling station, comprising:

[0037] A mounting base 1, the mounting base 1 is fixedly mounted at the pressure detection port of the hydrogen delivery pipeline, a mounting screw barrel 5 is fixedly connected to the inner wall of the mounting base 1, a threaded mounting tube 7 is threadedly connected to the inner wall of the mounting screw barrel 5, and a barometer 4 is fixedly connected to the upper end of the threaded mounting tube 7; and a glass protective cover 2 is detachably connected to the upper end of the mounting base 1 by bolts, and a hydrogen sensor alarm 3 is installed on the upper end of the glass protective cover 2;

[0038] A sealing mechanism 6, which is used to increase the sealing effect of the connection between the mounting screw barrel 5 and the threaded mounting tube 7, is arranged on one side of the mounting screw barrel 5;

[0039] The rotation positioning mechanism 8 is used to lock the position of the threaded mounting tube 7 so that the threaded mounting tube 7 can be stably installed and will not rotate and loosen. The rotation positioning mechanism 8 is arranged on one side of the threaded mounting tube 7; it includes a locking component 801 arranged on one side of the threaded mounting tube 7 and a positioning component 802 on the upper side of the mounting seat 1;

[0040] When in use, when installing the barometer 4, first pull the locking component 801 to unlock it, insert the threaded mounting tube 7 into the mounting screw barrel 5, and drive the threaded mounting tube 7 and the barometer 4 to be connected to the mounting screw barrel 5 through the thread, when the installation is completed; the lower end of the threaded mounting tube 7 squeezes the sealing mechanism 6 to seal the inside of the mounting screw barrel 5, making the seal tighter; when the installation is completed, release the locking component 801, at this time the locking component 801 locks the rotation of the threaded mounting tube 7, so that the threaded mounting tube 7 will not rotate by itself, which is more stable; at this time, the glass protection cover 2 is installed with the mounting seat 1 by bolts, and the overall installation is completed, and the threaded mounting tube 7 will not rotate by itself through the locking component 801 The sealing mechanism 6 can increase the sealing effect to ensure the safety of the device. The mounting screw 5 is fixed by welding. The barometer 4 can display the detected hydrogen pressure and other information. The glass protective cover 2 is a transparent glass cover, and the value displayed on the barometer 4 can be viewed through the glass protective cover 2. The hydrogen sensor alarm 3 can alarm when the hydrogen pressure in the barometer 4 is greater than the set threshold, so that the central control system of the diaphragm compressor can perform feedback adjustment to adjust the pressure in the hydrogen delivery pipeline. For the staff in this technical field, the glass protective cover 2, the hydrogen sensor alarm 3 and the barometer 4 are all prior art and will not be described in detail here.

[0041] Example 2: Figure 3 , Figure 4 and Figure 6 As shown, the locking assembly 801 includes a hexagonal ring 8011 and a mounting block 8015; wherein the hexagonal ring 8011 is fixedly connected to the circumferential surface of the threaded mounting tube 7 and rotates with the threaded mounting tube 7; the mounting block 8015 is fixedly arranged on the upper end of the mounting seat 1, and a first spring 8013 is fixedly connected to one side end of the mounting block 8015, and a fitting block 8012 is fixedly connected to the other end of the first spring 8013, and the inner wall of the fitting block 8012 fits the surface of the hexagonal ring 8011;

[0042] When the threaded mounting tube 7 is installed, the threaded mounting tube 7 can be driven to rotate by adjusting the hexagonal ring 8011. When the installation is completed, the first spring 8013 pushes the fitting block 8012 to fit the surface of the hexagonal ring 8011, thereby locking the rotation of the hexagonal ring 8011 and the threaded mounting tube 7, so that the threaded mounting tube 7 is more stable and will not rotate out when the threaded mounting tube 7 is not actively rotated.

[0043] As a preferred embodiment, Figure 4 As shown, the inner wall of the mounting block 8015 is slidably connected with a "C"-shaped pull rod 8014, one end of the "C"-shaped pull rod 8014 is fixedly connected to the fitting block 8012, and the first spring 8013 is sleeved on the circumferential surface of the "C"-shaped pull rod 8014;

[0044] When the first spring 8013 pushes the fitting block 8012 to fit the surface of the hexagonal ring 8011 for fixation, the first spring 8013 is prone to elastic deformation and damage during the expansion and contraction process. The first spring 8013 is supported by the "C"-shaped pull rod 8014, so that the first spring 8013 is not prone to elastic deformation. The fitting block 8012 can be easily pulled by the first spring 8013 to separate the fitting block 8012 from the hexagonal ring 8011, thereby facilitating the rotation of the hexagonal ring 8011 and the threaded mounting tube 7.

[0045] As a preferred embodiment, Figure 4 As shown, the upper end of the mounting block 8015 is fixedly connected to a slide rod 8016, and the surface of the slide rod 8016 is slidably connected to a blocking block 8017. When the locking assembly 801 needs to be continuously unlocked to facilitate the rotation of the threaded mounting tube 7, the "C"-shaped pull rod 8014 is pulled at the same time, and the blocking block 8017 slides between the "C"-shaped pull rod 8014 and the mounting block 8015 to block it, so that the "C"-shaped pull rod 8014 cannot be reset, and the fitting block 8012 cannot contact the hexagonal ring 8011. At this time, the hexagonal ring 8011 can be freely rotated.

[0046] Example 3: Figure 3 and Figure 5 As shown, the positioning assembly 802 includes a stepped hole 8021 opened at the upper end of the hexagonal ring 8011, and a lifting rod 8022 is slidably connected to the inner wall of the stepped hole 8021;

[0047] When the threaded mounting tube 7 is rotated and connected, it will continue to approach the mounting seat 1, at this time, the lifting rod 8022 is pushed to fit with the upper side of the mounting screw barrel 5, and the lifting rod 8022 is pushed out of the stepped hole 8021. When the installation is completed, the lifting rod 8022 coincides with the upper end of the hexagonal ring 8011, and the lifting installation is completed, preventing excessive rotation from causing the bottom sealing ring 602 to be squeezed and damaged, thereby losing the sealing effect.

[0048] As a preferred embodiment, Figure 5 As shown, a second spring 8023 is fixedly connected to the surface of the stepped hole 8021, and the lower end of the second spring 8023 is fixedly connected to the lifting rod 8022. The lifting rod 8022 can be continuously pulled by the second spring 8023, so that the lifting rod 8022 can be more accurate in indicating the installation depth.

[0049] Example 4: Figure 6As shown, the sealing mechanism 6 includes a mounting step 601 fixedly connected to the inner wall of the mounting screw barrel 5, a bottom sealing ring 602 is slidably connected to the inner wall of the mounting screw barrel 5, the inner wall of the mounting step 601 is fitted with the bottom sealing ring 602, and a side sealing ring 604 is integrally formed on the upper end of the bottom sealing ring 602, the distance between the circumferential surface of the side sealing ring 604 and the circumferential inner wall of the mounting screw barrel 5 is less than the thickness of the threaded mounting tube 7, and the circumferential inner wall of the side sealing ring 604 is fitted with the mounting step 601;

[0050] When the threaded installation tube 7 is installed through threads, the lower end of the threaded installation tube 7 squeezes the surface of the bottom sealing ring 602 to seal. At the same time, the circumferential inner wall of the threaded installation tube 7 forms an interference fit with the side sealing ring 604, and the bottom sealing ring 602 is squeezed to fit the installation step 601 to perform synchronous sealing from the side, thereby increasing the squeeze sealing area and the sealing effect.

[0051] As a preferred embodiment, Figure 6 As shown, the cross-section of the installation step 601 is "L"-shaped, so that the bottom sealing ring 602 will not fall off when squeezed and pushed, and it is more stable. The inner wall of the circumference of the side sealing ring 604 is fixedly connected with a plastic shaping ring 603, and the lower end of the plastic shaping ring 603 fits the upper end of the installation step 601. The plastic shaping ring 603 can make the bottom sealing ring 602 not easy to deform when it is inserted into the installation screw barrel 5 for assembly, and it is convenient to assemble and fall into the installation position correctly, so as to prevent the bottom sealing ring 602 from being squeezed and broken and unable to fall into place when the threaded installation tube 7 is installed due to incorrect installation, thereby losing the sealing effect.

[0052] The pressure detection device for hydrogen filling station of the utility model is used as follows: when installing the barometer 4, first pull the "C"-shaped pull rod 8014, then slide the blocking block 8017 between the "C"-shaped pull rod 8014 and the mounting block 8015 to block it, so that the "C"-shaped pull rod 8014 cannot be reset, and the fitting block 8012 cannot contact the hexagonal ring 8011. At this time, the threaded installation tube 7 is rotated into the installation screw barrel 5 for threaded installation. At this time, the threaded installation tube 7 continues to drop, pushing the lifting rod 8022 to fit the upper side of the installation screw barrel 5, and pushing the lifting rod 8022 to extend from the stepped hole 8021 to the installation completion position. At this time, pull up the blocking block 8017, and the first spring 8013 pushes the fitting block 8012 to fit the surface of the hexagonal ring 8011, and the hexagonal ring 8011 will not rotate at will. At the same time, the threaded installation tube 7 presses the surface of the bottom sealing ring 602 downward to seal. At the same time, the inner wall of the threaded installation tube 7 forms an interference fit with the side sealing ring 604, and the bottom sealing ring 602 is squeezed to fit the installation step 601, and the side is sealed synchronously to increase the squeeze sealing area and sealing effect. At this time, the sealing installation is completed, and then the glass protective cover 2 is mounted on the surface of the mounting seat 1 to complete the overall installation. The threaded installation tube 7 will not rotate and loosen by itself, ensuring the sealing stability. At the same time, the sealing mechanism 6 increases the sealing effect and increases the safety of the device. The barometer 4 can display information such as the air pressure in the pipeline, and the glass protective cover 2 is convenient for reading the barometer 4 to check the internal gas leakage.

[0053] 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 equipment 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 equipment. In the absence of further restrictions, the elements defined by the sentence "including a pressure detection device for a hydrogen refueling station" do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure detection device for a hydrogen refueling station, characterized in that: include: The mounting seat (1) is adapted to fit the hydrogen delivery pipeline, and a mounting screw barrel (5) is arranged inside the mounting seat (1); A glass protective cover (2) is arranged on the upper end of the mounting base (1), and a hydrogen sensor alarm (3) is arranged on the glass protective cover (2); A barometer (4) is arranged in the glass protective cover (2) and is connected to the mounting screw barrel (5) via a threaded mounting tube (7); A sealing mechanism (6) is arranged on one side of the mounting screw barrel (5) and is adapted to fit the threaded mounting tube (7); The rotation positioning mechanism (8) is arranged on one side of the threaded mounting tube (7), and comprises a locking component (801) arranged on one side of the threaded mounting tube (7) and a positioning component (802) arranged on the upper side of the mounting seat (1).

2. A pressure detection device for a hydrogen refueling station as claimed in claim 1, characterized in that: The sealing mechanism (6) comprises: An installation step (601) is fixedly disposed in the installation screw barrel (5); A bottom sealing ring (602) is slidably arranged in the mounting screw barrel (5) and is located on the upper side of the mounting step (601). A side sealing ring (604) is integrally formed on the upper end of the bottom sealing ring (602). Both the bottom sealing ring (602) and the side sealing ring (604) are compatible with the threaded mounting tube (7).

3. A pressure detection device for a hydrogen refueling station as claimed in claim 2, characterized in that: A shaping ring (603) is arranged on the outside of the side sealing ring (604), and the lower end of the shaping ring (603) fits the upper end of the installation step (601); and the distance between the circumferential surface of the side sealing ring (604) and the circumferential inner wall of the installation screw barrel (5) is less than the thickness of the threaded installation tube (7).

4. A pressure detection device for a hydrogen refueling station as claimed in claim 1, characterized in that: The locking assembly (801) comprises: A hexagonal ring (8011) is arranged outside the circumference of the threaded mounting tube (7) and is fixedly connected to the threaded mounting tube (7); The mounting block (8015) is arranged at the upper end of the mounting seat (1), and a first spring (8013) is arranged at the side end of the mounting block (8015), and a fitting block (8012) is arranged at one end of the first spring (8013), and the inner wall of the fitting block (8012) fits with the hexagonal ring (8011).

5. A pressure detection device for a hydrogen refueling station as claimed in claim 4, characterized in that: A "C"-shaped pull rod (8014) is slidably arranged inside the installation block (8015), one end of the pull rod (8014) is connected to the fitting block (8012), and the first spring (8013) is sleeved on the outside of the pull rod (8014).

6. A pressure detection device for a hydrogen refueling station as claimed in claim 5, characterized in that: A sliding rod (8016) is arranged at the upper end of the installation block (8015), and a blocking block (8017) is slidably connected to the surface of the sliding rod (8016).

7. A pressure detection device for a hydrogen refueling station as claimed in claim 4, characterized in that: The positioning assembly (802) comprises a stepped hole (8021) opened at the upper end of the hexagonal ring (8011), and a lifting rod (8022) is slidably arranged on the inner wall of the stepped hole (8021).

8. A pressure detection device for a hydrogen refueling station as claimed in claim 7, characterized in that: A second spring (8023) is arranged on the surface of the stepped hole (8021), and the lower end of the second spring (8023) is connected to the lifting rod (8022).

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