CN218761665U - Vehicle pressure reducing device with breathing channel - Google Patents

Abstract

The utility model relates to a vehicular pressure reducing device with breathing passage. A pressure relief device with a breathing passage for a vehicle, comprising: the primary pressure reducing valve is internally provided with a primary valve cavity, and a primary valve core and a primary pressure regulating spring are arranged in the primary valve cavity; the secondary pressure reducing valve is internally provided with a secondary valve cavity, and a secondary valve core and a secondary pressure regulating spring are arranged in the secondary valve cavity; a connecting passage is arranged between the primary valve cavity and the secondary valve cavity and inside the automotive pressure reducing device, and the connecting passage connects the primary valve cavity with the secondary valve cavity; a breathing passage is arranged on the cavity wall of one of the primary valve cavity and the secondary valve cavity and is used for communicating the primary valve cavity and the secondary valve cavity with the outside. The scheme can reduce the number of parts of the automotive pressure reducing device, reduce the volume and/or improve the problem of foreign matters entering the valve cavity.

Description

Vehicle pressure reducing device with breathing channel

Technical Field

The utility model relates to an automobile-used pressure relief device with breathing passageway.

Background

The fluid pressure reduction device has applications in many fields, for example, in the control technology of hydrogen energy systems on board hydrogen fuel cell vehicles, the high-pressure hydrogen fluid pressure reduction device is a key component. At present, with the rapid development of the new energy automobile market, the hydrogen fuel cell automobile gradually becomes an important exploration direction for solving the energy resource crisis and the environmental crisis. However, for a hydrogen fuel cell vehicle, the pressure of the hydrogen storage system determines the amount of hydrogen stored, the current higher hydrogen storage system can reach 70Mpa, and the hydrogen input pressure required by the stack is only 1Mpa-2Mpa, so a fluid pressure reduction device needs to be arranged between the gas outlet system and the stack for pressure reduction, and the fluid pressure reduction device often includes two-stage pressure reduction valves.

A valve assembly for a gas storage system, disclosed in, for example, patent document CN211423455U, of a fluid pressure reducing device in the related art, includes a valve body, and a primary pressure reducing valve and a secondary pressure reducing valve sequentially connected to the valve body. The primary pressure reducing valve is provided with a primary valve cavity, and a primary valve core and a primary pressure regulating spring are arranged in the primary valve cavity; the secondary pressure reducing valve is provided with a secondary valve cavity, and a secondary valve core and a secondary pressure regulating spring are arranged in the secondary valve cavity. When the pressure-regulating valve is used, the primary valve core and the secondary valve core reach a balanced state under the action of fluid pressure and the pressure-regulating springs corresponding to the fluid pressure and the pressure-regulating springs, so that secondary pressure reduction of the fluid is realized.

Because the primary valve core needs to move in the primary valve cavity when working and the secondary valve core needs to move in the secondary valve cavity when working, and the valve cores can cause the space volume of the spring cavity to change when moving, breathing channels need to be arranged on the cavity wall of the primary valve cavity and the cavity wall of the secondary valve cavity, and the action of the valve cores is prevented from being influenced by air pressure. In view of cleaning, a breathing valve is often required to be arranged at the breathing passage.

However, the two breather valves not only increase the number of parts of the pressure reducing device for a vehicle and affect the assembly efficiency and the manufacturing and maintenance costs, but also increase the volume of the pressure reducing device for a vehicle and are disadvantageous for miniaturization. Meanwhile, the breathing passage is easy to cause foreign matters to enter the valve cavity, and the reliability of the automotive pressure reducing device is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automobile-used pressure relief device with breathing passageway can reduce automobile-used pressure relief device's spare part quantity, reduce the volume to/or can improve the problem that gets into the foreign matter in the valve pocket.

The utility model discloses in adopt following technical scheme:

a vehicular pressure relief device with a breathing passage, comprising:

the primary pressure reducing valve is internally provided with a primary valve cavity, and a primary valve core and a primary pressure regulating spring are arranged in the primary valve cavity;

the secondary pressure reducing valve is internally provided with a secondary valve cavity, and a secondary valve core and a secondary pressure regulating spring are arranged in the secondary valve cavity;

a connecting passage is arranged between the primary valve cavity and the secondary valve cavity and inside the automotive pressure reducing device, and the connecting passage connects the primary valve cavity with the secondary valve cavity;

a breathing passage is arranged on the cavity wall of one of the primary valve cavity and the secondary valve cavity and is used for communicating the primary valve cavity and the secondary valve cavity with the outside.

Has the beneficial effects that: by adopting the technical scheme, the connecting channel is arranged in the pressure reducing device for the vehicle and communicates the primary valve cavity with the secondary valve cavity, so that the primary valve cavity and the secondary valve cavity are communicated with the outside through the breathing channel on the cavity wall of the primary valve cavity or the secondary valve cavity, compared with the situation that each breathing channel is provided with a breathing valve, the number of parts can be reduced, the size can be reduced, and the problem that foreign matters enter the valve cavity can be solved because the connecting channel can increase the length of the breathing channel on the corresponding valve cavity.

As a preferred technical scheme: the primary valve cavity of the primary pressure reducing valve is arranged in a valve cavity shell, a valve core gland is connected to the valve cavity shell, and a secondary valve cavity of the secondary pressure reducing valve is enclosed by the valve core gland and the valve cavity shell; the connecting channel is arranged on the valve cavity shell.

Has the beneficial effects that: by adopting the technical scheme, the valve cavity shell can be made thicker, which is beneficial to the arrangement of the connecting channel.

As a preferred technical scheme: a radial through hole is formed in the cavity wall of the primary valve cavity, and the breathing passage is formed by the radial through hole; one end of the connecting channel is communicated with the secondary valve cavity, and the other end of the connecting channel is communicated with the radial through hole.

Has the advantages that: by adopting the technical scheme, the structure is simple, and the processing is convenient.

As a preferred technical scheme: the arrangement direction of the first-stage pressure reducing valve and the second-stage pressure reducing valve is taken as the axial direction of the vehicle pressure reducing device, and the connecting channel extends along the axial direction of the vehicle pressure reducing device.

Has the advantages that: by adopting the technical scheme, the processing of the connecting channel is convenient.

As a preferred technical scheme: the secondary pressure regulating spring is supported on the bottom wall of the secondary valve cavity;

and a channel communication counter bore is arranged on the bottom wall of the secondary valve cavity, and the corresponding end opening of the connecting channel is arranged on the hole bottom wall of the channel communication counter bore.

Has the beneficial effects that: by adopting the technical scheme, the shape of the connecting channel is facilitated to be simplified, and the processing is convenient.

As a preferred technical scheme: the peripheral surface of the vehicle pressure reducing device is provided with a breather valve mounting counter bore, the breather channel is connected with a breather valve, and the breather valve sinks into the breather valve mounting counter bore.

Has the advantages that: adopt above-mentioned technical scheme can avoid the foreign matter to get into the valve intracavity better.

As a preferred technical scheme: the aperture of the breather valve mounting counter bore is larger than the outer diameter of the breather valve.

Has the advantages that: adopt above-mentioned technical scheme to protect the breather valve to be favorable to reducing whole volume and weight.

As a preferred technical scheme: the hole wall of the breather valve mounting counter bore is connected with an exhaust passage, one end of the exhaust passage in the length direction is communicated with the breather valve mounting counter bore, and the other end of the exhaust passage penetrates through the outer circular surface of the automotive pressure reducing device.

Has the advantages that: adopt above-mentioned technical scheme can avoid the breather valve to be influenced normal breathing by the closing cap.

As a preferred technical scheme: the exhaust passage is an exhaust groove provided on an outer peripheral surface of the decompression device.

Has the advantages that: by adopting the technical scheme, the processing is convenient, and the structure is simple.

As a preferred technical scheme: the bottom surface of the exhaust groove is flush with the bottom wall of the hole of the breather valve mounting counter bore.

Drawings

FIG. 1 is a first perspective view of a vehicular pressure relief device with a breathing passage according to embodiment 1 of the present invention;

FIG. 2 is a second perspective view of the vehicular pressure reducing device of embodiment 1 with a breathing passage according to the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a functional schematic diagram of embodiment 1 of the vehicular pressure reducing device with breathing passage of the present invention;

FIG. 6 is a schematic diagram of another embodiment of a vehicular pressure relief device with a breathing passage according to the present invention;

names of components corresponding to corresponding reference numerals in the drawings are: 11. an air inlet joint; 12. a high pressure sensor interface; 21. a valve cavity shell; 22. a fixing hole; 23. a secondary valve seat mounting cylinder; 24. a counter bore is arranged on the valve seat; 25. a connecting cylinder; 26. a breathing passage; 27. a breather valve; 28. a connecting channel; 31. a valve seat; 32. a boss; 33. a valve port; 40. a first-stage valve cavity; 41. a primary valve core; 42. a guide section; 43. a first-stage pressure regulating spring; 44. inserting and mounting sections; 45. inserting a sealing ring; 46. a primary sealing block; 47. a flow channel; 48. avoiding the mouth; 51. A valve seat crimping member; 52. an air intake passage; 53. an annular projection; 54. a flange structure; 55. a fixing screw; 61. a filter element; 62. an annular flange; 70. a secondary valve cavity; 71. a secondary valve seat; 72. a secondary valve core; 73. a secondary pressure regulating spring; 74. a secondary sealing block; 75. a conical boss; 76. a communicating hole; 77. a Y-shaped seal ring; 78. an axial through passage; 79. mounting a counter bore on the breather valve; 710. an exhaust passage; 711. the channel is communicated with the counter bore; 81. an annular step; 82. pressing the valve seat; 83. a support pad; 84. crimping sleeves; 91. a valve core gland; 92. a low pressure sensor interface; 93. a safety valve; 94. and a service port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises a … …" defines an element that may occur does not preclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model discloses in have breathing passage's automobile-used pressure relief device's embodiment 1:

the pressure reducing device with the breathing passage for the vehicle in the embodiment is a pressure reducing device for a high-pressure hydrogen vehicle, and is used for a hydrogen energy vehicle. As shown in fig. 1 and 2, the pressure reducing device for a vehicle includes an intake joint 11, a valve chamber housing 21 (i.e., a main valve body), a pressure contact sleeve 84, and a valve core cover 91 (i.e., an outlet joint). The main valve body is provided with a fixing hole 22 for fixing the pressure reducing device for the vehicle; a first-stage pressure reducing valve and a second-stage pressure reducing valve are arranged in the pressure reducing device for the vehicle, and two-stage pressure reduction can be achieved. As shown in fig. 3, 4 and 5, the inlet connector 11 is provided with a high-pressure sensor interface 12, and the valve core gland 91 (i.e., the outlet connector) is provided with a safety valve 93, a low-pressure sensor interface 92 and a service port 94.

For the sake of clarity, the embodiment of the present invention will be described below with the end of the vehicular pressure reducing device provided with the air inlet joint 11 as the lower end and the end provided with the valve core cover 91 (i.e., the air outlet joint) as the upper end, in accordance with the orientation shown in fig. 3. Of course, the above "up" and "down" are not used to limit the actual placement state or use state of the vehicle decompression device, and the vehicle decompression device may be horizontally, obliquely, or vertically disposed, and when vertically disposed, one end of the air intake joint 11 may also be upward.

Specifically, as shown in fig. 3 and 4, the valve chamber of the primary pressure reducing valve is provided on a main valve body which forms a valve chamber housing 21 of the primary pressure reducing valve. The primary valve cavity 40 of the primary pressure reducing valve is internally provided with a primary valve core 41 and a primary pressure regulating spring 43, the primary valve core 41 is arranged in an up-and-down guiding manner, the upper end of the primary valve core 41 is supported on an annular stopping step arranged on the valve cavity shell 21, and the primary pressure regulating spring 43 is used for providing acting force for the primary valve core 41 to move upwards and away from the valve port 33. In order to facilitate the correction of the reduced pressure, a first-stage valve adjusting gasket is arranged on the lower end pad of the first-stage pressure regulating spring 43, the thickness of the first-stage valve adjusting gasket is 0.1 or 0.2mm, and the reduced pressure is adjusted by increasing or decreasing the number of the first-stage valve adjusting gaskets. A secondary valve seat mounting cylinder 23 is arranged at the center of the top of the valve cavity shell 21 and used for assembling a secondary valve seat 71; the top of the primary valve core 41 is provided with a guide section 42, the guide section 42 is provided with a sealing ring groove, a sealing ring is arranged in the sealing ring groove, and the sealing ring enables the guide section 42 to be in sliding sealing fit with the inner wall of the secondary valve seat mounting cylinder 23.

The lower end of the valve cavity shell 21 is provided with a valve seat mounting counter bore 24, and a valve seat 31 of the primary pressure reducing valve is embedded in the valve seat mounting counter bore 24. A valve core jack is arranged on a valve seat 31 of the primary pressure reducing valve, and a valve port 33 is arranged at the bottom of the valve core jack. The lower end of the primary valve core 41 is provided with an insertion section 44, the insertion section 44 is inserted into the valve core jack, and an insertion sealing ring 45 is arranged between the hole wall of the valve core jack and the outer peripheral surface of the insertion section 44 of the valve core. The lower end face of the primary valve core 41 is embedded with a primary sealing block 46, and the primary sealing block 46 is used for being matched with the valve port 33 to form a certain opening degree to play a role in pressure reduction. The inside of the first-stage valve core 41 is provided with a flow passage 47 used for leading to a second-stage pressure reducing valve of a vehicle pressure reducing device, the flow passage 47 comprises an axial passage and a radial passage, the radial passage is arranged on a small-diameter section below the plug sealing ring 45, the outer end of the radial passage is communicated with an annular gap between the first-stage valve core 41 and the wall of a valve core insertion hole, and the inner end of the radial passage is communicated with the axial passage.

The outer peripheral surface of the valve seat 31 is a smooth cylindrical surface, the outer diameter of the valve seat 31 is matched with the inner diameter of the valve seat mounting counter bore 24 so as to realize radial positioning, and the valve seat and the valve cavity shell 21 can translate relatively along the axial direction of the valve core insertion hole and can be assembled in place in a relative translation mode; the top end face of the valve seat 31 is supported on the bottom wall of the bore of the valve seat mounting counterbore 24 for axial positioning. The pressure reducing device for the vehicle further comprises a valve seat crimping piece 51, the valve seat crimping piece 51 is an air inlet connector 11, an air inlet channel 52 is arranged on the air inlet connector 11, and the air inlet channel 52 penetrates through the air inlet connector 11 along the axial direction of the valve core insertion hole; the valve port 33 is located on the extending path of the intake passage 52, and the intake passage 52 is butted against the valve port 33 of the valve seat 31. The end, back to the primary valve core 41, of the valve seat 31 is provided with a boss 32, an annular space is formed between the boss 32 and the hole wall of the valve seat installation counter bore 24, one side, close to the valve seat 31, of the valve seat pressing part 51 is provided with an annular bulge 53, and the annular bulge 53 is embedded into the annular space, so that radial positioning can be achieved. The upper end surface of the air inlet joint 11 is pressed against the lower end surface of the boss 32 to fix the valve seat 31 to the valve chamber housing 21. The pressure-welding piece 51 is provided with a flange structure 54, and the flange structure 54 is provided with a screw, and can be fixed on the valve chamber shell 21 through the screw to form a fixing structure, so that the valve seat 31 and the valve chamber shell 21 are relatively fixed when being assembled in place. In order to avoid gas leakage from the interface between the inlet channel 52 and the valve port 33, a sealing ring is arranged between the inlet connector 11 and the valve seat 31, and the sealing ring is arranged in an annular groove on the lower end surface of the valve seat 31. The end face of the annular protrusion 53 is spaced from the valve seat 31, so that the compression of a sealing ring on the valve seat 31 can be ensured, and the sealing between the valve seat 31 and the air inlet joint 11 can be ensured.

The inner end of the air inlet channel 52 on the air inlet joint 11 is embedded with a filter element 61, the filter element 61 is a hollow cylindrical structure, the longitudinal section of the filter element is U-shaped, the opening of the U-shaped structure faces the valve port 33, the radial outer side of the opening end of the valve element is provided with an annular flange 62, and the annular flange 62 is supported at one end of the air inlet joint 11 facing the valve seat 31. The high pressure sensor port 12 on the air inlet connector 11 is perpendicular to the air inlet channel 52, and the inner end corresponds to the lower end of the filter element 61. The lowest end of the air inlet joint 11 is provided with external threads for connecting corresponding pipelines.

The secondary pressure reducing valve is arranged above the primary pressure reducing valve and comprises a secondary valve seat 71, a secondary valve core 72 and a secondary pressure regulating spring 73. The secondary valve seat 71 is arranged in the secondary valve seat installation cylinder 23, the lower end of the secondary valve seat 71 is supported on a supporting ring table on the inner wall of the secondary valve seat installation cylinder 23, the upper end of the secondary valve seat installation cylinder is provided with a valve seat pressing sleeve 82 and a supporting gasket 83, the valve seat pressing sleeve 82 is provided with external threads, the secondary valve seat pressing sleeve is in threaded connection with the secondary valve seat installation cylinder 23, and the secondary valve core 72 is fixed through the supporting gasket 83. A sealing ring is arranged between the valve seat pressing sleeve 82 and the inner wall of the secondary valve seat mounting cylinder 23, a secondary sealing block 74 is fixed in the middle of the secondary valve seat 71 through a screw, and a conical boss 75 is arranged on the lower side of the secondary valve core 72, so that a longer threaded hole is machined in the secondary valve seat 71 for screw assembly. The radial edge position of the secondary sealing block 74 is provided with a communicating hole 76 which is communicated up and down, and gas in a valve cavity of the primary pressure reducing valve enters the secondary pressure reducing valve. The lower end of the secondary valve core 72 is inserted into the secondary valve seat mounting cylinder 23 in a sliding sealing manner through a sealing ring arranged between the valve seat pressing sleeve 82 and the supporting gasket 83, and can be matched with the secondary sealing block 74 on the secondary valve seat 71 during up-and-down movement to form a certain opening degree, so that the pressure reduction effect is achieved. The secondary valve core 72 is provided with an axial through channel 72, which is communicated with an air outlet channel axially through the valve core gland 91 (i.e. air outlet joint). In order to reduce the axial dimension of the pressure reducing device and better realize light weight and miniaturization, the top of the primary valve core 41 is provided with an avoiding port 48, the avoiding port 48 is a horn mouth, and a conical boss 75 arranged on the lower side of the secondary valve core 72 is embedded into the avoiding port, so that the axial dimension is saved, the air flow drainage effect can be achieved, and the flow resistance is reduced. Of course, in other embodiments, the bypass opening 48 at the top of the primary valve core 41 may be formed by a cylindrical hole, and the portion of the lower side of the secondary valve core 72 for providing the threaded hole may also be a cylindrical structure.

A low-pressure sensor interface 92 and a safety valve 93 on the spool gland 91 (i.e. the air outlet joint) are arranged perpendicular to the air outlet channel, and a service port 94 is also arranged on the spool gland 91 (i.e. the air outlet joint).

The upper part of the valve cavity shell 21 is provided with a connecting cylinder 25, the connecting cylinder 25 and the secondary valve seat mounting cylinder 23 are coaxially arranged, a secondary pressure regulating spring 73 is arranged in an annular space between the connecting cylinder 25 and the secondary valve seat mounting cylinder 23, the lower end of the secondary pressure regulating spring 73 is directly or indirectly supported on the bottom surface of the annular space, and the upper end of the secondary pressure regulating spring is supported on the secondary valve core 72 and is used for providing acting force for the secondary valve core 72 to move upwards and away from the valve port 33. In order to realize the correction of the decompression pressure, a secondary valve adjusting gasket is arranged at the lower end of the secondary pressure regulating spring 73 in a cushioning mode, the thickness of the secondary valve adjusting gasket is 0.1 mm or 0.2mm, and the decompression pressure is adjusted by increasing or decreasing the number of the secondary valve adjusting gaskets. The valve core gland 91 (i.e. the air outlet joint) is buckled at the top of the connecting cylinder 25, supported on the outer annular table at the top of the connecting cylinder 25, and forms a valve cavity of the secondary pressure reducing valve with the connecting cylinder 25. The crimping sleeve 84 is used for crimping the valve core pressing cover 91 (i.e. the air outlet connector) onto the valve cavity shell 21, specifically, an external thread is arranged on the connecting cylinder 25 of the valve cavity shell 21, an annular step 81 is arranged at the upper end of the inner wall of the crimping sleeve 84, and the annular step 81 is used for pressing an outer annular table arranged on the outer circumferential surface of the valve core pressing cover 91 (i.e. the air outlet connector) when the crimping sleeve 84 is connected onto the connecting cylinder 25 in a threaded manner, so that the pressing of the secondary valve core 72 is realized. Similarly, the compression of the secondary valve core 72 by the compression sleeve 84 can prevent the secondary valve core 72 from rotating during assembly, and prevent a sealing ring at an insertion section between the secondary valve core 72 and the inner wall of the valve core insertion hole or a sealing ring between the secondary valve core 72 and the air outlet joint from being damaged.

As shown in fig. 4, a breathing passage 26 communicating with the valve cavity of the primary pressure reducing valve is provided on the outer circumferential surface of the valve cavity housing 21, the breathing passage 26 extends along the radial direction of the primary valve cavity 40, and a breathing valve 27 is provided at the outer end thereof for preventing the valve core from being influenced by the change of air pressure in the valve cavity when the valve core moves. The bottom surface of the annular space is provided with a connecting passage 28 communicated with the breathing passage 26, so that the valve cavity of the secondary pressure reducing valve and the valve cavity of the primary pressure reducing valve share one breathing valve 27, and the structure is compact. A passage communication counterbore 711 is arranged on the bottom wall of the secondary valve chamber 70, and the corresponding end opening of the connecting passage 28 is arranged on the hole bottom wall of the passage communication counterbore 711, so as to avoid the blockage of the connecting passage 28. In order to avoid the influence of the breathing valve on the gas flow caused by the sealing, a breathing valve mounting counter bore 79 is arranged on the outer peripheral surface of the vehicle pressure reducing device, the breathing valve 27 connected to the breathing passage 26 sinks into the breathing valve mounting counter bore 79, the aperture of the breathing valve mounting counter bore 79 is larger than the outer diameter of the breathing valve 27, an exhaust groove is arranged on the outer peripheral surface of the pressure reducing device, one end of the exhaust groove is communicated with the hole wall of the breathing valve mounting counter bore 79 to form an exhaust passage 710, and the other end of the exhaust groove penetrates through the outer peripheral surface of the vehicle pressure reducing device and leads to a mounting step for arranging the fixing hole 22. The bottom surface of the exhaust groove is flush with the bottom wall of the breather valve mounting counter bore 79, so that normal breathing of the breather valve 27 can be ensured more reliably.

During assembly, the valve core of the primary pressure reducing valve is installed in the valve seat installation counterbore 24 at the lower end of the valve cavity shell 21 in a translation mode, the valve core is supported on the bottom of the valve seat installation counterbore 24, then the air inlet connector 11 is pressed on the valve core in a translation mode, the air inlet connector 11 is fixed on the valve cavity shell 21 through the fixing screw 55, and the valve seat 31 and the valve cavity shell 21 are assembled and fixed.

When the high-pressure hydrogen gas pressure reducing valve is used, high-pressure hydrogen gas enters the valve port 33 of the primary pressure reducing valve through the gas inlet joint 11 and the filter element 61, then passes through the primary valve core 41 through the radial channel and the axial channel on the valve core, acts on the upper end surface of the primary valve core 41, pushes the primary valve core 41 to move downwards, enables the primary valve core 41 to keep balance under the combined action of the gas pressure of the upper end and the lower end of the primary valve core 41 and the primary pressure regulating spring 43, and achieves primary pressure reduction. The hydrogen gas after the primary pressure reduction enters the secondary valve core 72 from the communication hole 76 on the secondary valve seat 71, is discharged to the valve core gland 91 (namely, an air outlet joint) through the axial through channel 72 on the secondary valve core 72, acts on the upper end surface of the secondary valve core 72, pushes the secondary valve core 72 to move downwards, keeps the balance of the gas pressure of the secondary valve core 72 at the upper end and the lower end under the combined action of the secondary pressure regulating spring 73, realizes secondary pressure reduction, and is finally discharged from the air outlet channel on the valve core gland 91 (namely, the air outlet joint). During the action of each valve core, the volume changes of the primary valve cavity 40 and the secondary valve cavity 70 can realize air pressure balance through the breathing passage 26, the connecting passage 28 and the breathing valve 27.

The utility model discloses in have breathing passage's automobile-used pressure relief device's embodiment 2:

the difference between this embodiment and embodiment 1 is that in embodiment 1, a breathing passage 26 is provided on the cavity wall of the primary valve cavity 40, and the secondary valve cavity 70 is communicated with the primary valve cavity 40 through a connecting passage 28; in this embodiment, however, the axial dimension of the crimp sleeve 84 is short, and the breathing passage 26 and the breathing valve 27 are disposed on the wall of the secondary valve chamber 70.

The utility model discloses in have breathing passage's automobile-used pressure relief device's embodiment 3:

the present embodiment is different from embodiment 1 in that in embodiment 1, the connection passage 28 extends in the up-down direction and is connected to the breathing passage 26; in this embodiment, the connecting passage 28 extends obliquely and has two ends directly connected to the first-stage valve chamber 40 and the second-stage valve chamber 70, respectively. Of course, in other embodiments, the connecting channel 28 may be formed by connecting a plurality of channels with a certain angle.

The utility model discloses in have breathing passage's automobile-used pressure relief device's embodiment 4:

the difference between the embodiment and the embodiment 1 is that in the embodiment 1, a breather valve mounting counterbore 79 is arranged on the outer peripheral surface of the vehicle pressure reducing device, a breather valve is connected to the breather passage, and the breather valve sinks into the breather valve mounting counterbore 79; in this embodiment, the breather valve protrudes from the outer peripheral surface of the vehicle pressure reducing device.

The utility model discloses in have breathing passage's automobile-used pressure relief device's embodiment 5:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the exhaust passage 710 connected to the hole wall of the breather valve mounting counterbore 79 is an exhaust groove provided on the outer peripheral surface of the pressure reducing device; in this embodiment, however, the vent passage 710 is a vent hole provided in the wall of the breather valve mounting counterbore 79.

The pressure reducing device with a breathing passage for a vehicle in the above embodiment includes a two-stage pressure reducing valve, and in other embodiments, the pressure reducing device for a vehicle may be provided with only one stage pressure reducing structure. In addition, in the above embodiment, the secondary valve element 72 and the valve seat pressing sleeve 82 are sealed by the O-ring, in other embodiments, as shown in fig. 6, the secondary valve element 72 and the valve seat pressing sleeve 82 may be sealed by the Y-ring 77, the cross section of the Y-ring 77 is Y-shaped, and the opening faces the secondary valve seat 71, so that a linear self-sealing effect can be formed under the action of high-pressure hydrogen, which is beneficial to reducing friction force and improving the pressure reduction performance of the secondary pressure reducing valve.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A pressure relief device with a breathing passage for a vehicle, comprising:

the primary pressure reducing valve is internally provided with a primary valve cavity (40), and a primary valve core (41) and a primary pressure regulating spring (43) are arranged in the primary valve cavity (40);

the secondary pressure reducing valve is internally provided with a secondary valve cavity (70), and a secondary valve core (72) and a secondary pressure regulating spring (73) are arranged in the secondary valve cavity (70);

it is characterized in that the preparation method is characterized in that,

a connecting passage (28) is arranged between the primary valve cavity (40) and the secondary valve cavity (70) in the pressure reducing device for the vehicle, and the connecting passage (28) is used for communicating the primary valve cavity (40) with the secondary valve cavity (70);

a breathing passage (26) is arranged on the cavity wall of one of the primary valve cavity (40) and the secondary valve cavity (70) and is used for communicating the primary valve cavity (40) and the secondary valve cavity (70) with the outside.

2. The vehicular pressure reducing device according to claim 1, wherein the primary valve cavity (40) of the primary pressure reducing valve is arranged in the valve cavity housing (21), the valve cavity housing (21) is connected with a valve core gland (91), and the secondary valve cavity (70) of the secondary pressure reducing valve is enclosed by the valve core gland (91) and the valve cavity housing (21); the connecting channel (28) is arranged on the valve chamber housing (21).

3. The pressure reducing device for the vehicle as claimed in claim 2, wherein the wall of the primary valve chamber (40) is provided with a radial through hole, and the breathing passage (26) is formed by the radial through hole; one end of the connecting channel (28) is communicated with the secondary valve cavity (70), and the other end is communicated with the radial through hole.

4. A decompression arrangement for vehicles according to claim 1, 2 or 3, wherein the connecting passage (28) extends in the axial direction of the decompression arrangement for vehicles with the arrangement direction of the primary decompression valve and the secondary decompression valve being the axial direction of the decompression arrangement for vehicles.

5. The pressure reducing device for vehicle as claimed in claim 1, 2 or 3, wherein the secondary pressure regulating spring (73) is supported on the bottom wall of the secondary valve chamber (70);

and a channel communication counterbore (711) is arranged on the bottom wall of the secondary valve cavity (70), and the opening at the corresponding end of the connecting channel (28) is arranged on the bottom wall of the channel communication counterbore (711).

6. The vehicular decompression device according to claim 1, 2 or 3, wherein a breather valve mounting counterbore (79) is provided on an outer peripheral surface of the vehicular decompression device, the breather valve (27) is connected to the breather passage (26), and the breather valve (27) is sunk into the breather valve mounting counterbore (79).

7. The vehicular pressure relief device of claim 6, wherein the breather valve mounting counterbore (79) has a bore diameter greater than an outer diameter of the breather valve (27).

8. The vehicular pressure reducing device according to claim 6, wherein the hole wall of the breather valve mounting counterbore (79) is connected with an exhaust passage (710), one end of the exhaust passage (710) in the length direction is communicated with the breather valve mounting counterbore (79), and the other end of the exhaust passage penetrates through the outer circular surface of the vehicular pressure reducing device.

9. The decompression device for a vehicle according to claim 8, wherein the exhaust passage (710) is an exhaust groove provided on an outer peripheral surface of the decompression device.

10. The vehicular pressure reducing device according to claim 9, wherein a groove bottom surface of the vent groove is flush with a hole bottom wall of the breather valve mounting counterbore (79).

Images