Diaphragm type hydrogen compressor high-pressure air suction valve

Abstract

The utility model discloses a high-pressure air suction valve of a diaphragm type hydrogen compressor, and belongs to the technical field of compressors. Comprising a valve body, a valve seat, a valve plate and a spring, a spring guiding and positioning groove and a valve seat guiding and positioning groove are formed in the valve body, and the valve seat guiding and positioning groove is formed along the central axis of the valve body. The valve seat slides in the axial direction of the valve seat guiding and positioning groove. The bottom of the valve body and the bottom of the valve seat are matched and sealed to form a grinding sealing surface structure, so that leakage is avoided when the air valve is closed; the valve seat is accurately guided, damage caused by deviation is avoided, the spring is of a pagoda-shaped structure, overstress impact between the valve plate and the valve seat and overstress impact between the valve seat and the valve body are avoided, and the service life of the air valve is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a high-pressure suction valve of a diaphragm hydrogen compressor. Background Art

[0002] Hydrogen is an important source of vehicle power. Hydrogen energy is light in weight, good in heat conduction, rich in reserves, good in combustibility, and recyclable. It is a recognized environmentally friendly clean energy, and hydrogen fuel vehicles have developed vigorously accordingly. Hydrogen fuel vehicles store hydrogen in the fuel tank of the hydrogen fuel vehicle through a hydrogen compressor at the hydrogen refueling station. In recent years, hydrogen compressors have been developing towards the goals of high pressure and large displacement. As an important component of it, the air valve withstands tensile compression, impact, wear, corrosion, high temperature, etc. during operation, and has a very short service life. Therefore, the requirements for its process are getting higher and higher. However, the existing air valves on the market have poor airtightness and anti-stamping ability, short service life, and the air valves often break down. Even the compressor diaphragm is damaged due to the damage of the air valve, affecting the normal operation of the entire diaphragm unit. Content of the Utility Model

[0003] In order to solve the above problems, the utility model provides a high-pressure suction valve of a diaphragm hydrogen compressor. Through a specific valve body and a valve seat grinding sealing surface structure, the air valve does not leak when closed, has accurate guidance, and the pressure received is reduced, greatly improving the service life of the suction valve.

[0004] In order to achieve the above object, the utility model is realized through the following technical solutions:

[0005] The high-pressure suction valve of the diaphragm hydrogen compressor includes a valve body, a valve seat, a valve plate and a spring. The valve seat includes a valve seat top and a valve seat bottom. The valve body includes a valve body top and a valve body bottom. And both the valve body bottom and the valve seat bottom are grinding surfaces. The valve body bottom and the valve seat bottom cooperate to seal and form a grinding sealing surface;

[0006] A spring guide positioning groove and a valve seat guide positioning groove are arranged in the valve body. The valve seat guide positioning groove is arranged along the central axis of the valve body; the valve seat slides axially along the valve seat guide positioning groove;

[0007] An air inlet flow channel hole is arranged at the valve body top. A gap formed by separating the valve body bottom from the valve seat bottom forms an air outlet flow channel hole;

[0008] One end of the spring is in contact connection with the valve plate. The spring and the valve plate are sleeved outside the valve seat. The spring contraction drives the valve plate to open and close the air inlet flow channel hole.

[0009] Further, a thread and a nut are arranged at the valve seat top. The nut is fixedly connected to the valve seat top through the thread.

[0010] Further, one end of the spring is the small-diameter end, and the other end of the spring is the large-diameter end. The small-diameter end spirally extends along the large-diameter end so that the spring forms a pagoda shape.

[0011] Further, one end of the valve plate is connected to the small-diameter end of the spring, and the other end of the valve plate is pressed against the nut by the action of the spring.

[0012] Further, the large-diameter end of the spring is fixedly connected to the spring guide positioning groove.

[0013] Further, a limiting step is provided at the bottom of the valve body, and the limiting step is cooperatively connected with the bottom of the valve seat to form positioning and sealing.

[0014] Further, sealing gaskets are provided at both ends of the outer side of the valve body.

[0015] Further, a locking ring parallel to the bottom plane of the valve seat is fixedly provided at the center of the bottom of the valve seat, and a locking pin perpendicular to the bottom plane of the valve body is fixedly provided at the bottom of the valve body. The locking ring is sleeved on the locking pin to form a state of strengthening the connection between the valve body and the valve seat; when the locking ring is separated from the locking pin, a state of releasing and starting for the valve body and the valve seat is formed.

[0016] The high-pressure suction valve of the diaphragm machine for a hydrogen refueling station of the present utility model has the following beneficial effects:

[0017] (1) In the present utility model, the bottom of the valve body and the bottom of the valve seat are cooperatively sealed to form a ground sealing surface structure, so that no leakage occurs when the air valve is closed;

[0018] (2) A valve seat guide positioning groove is provided inside the valve body, and a limiting step is provided at the bottom of the valve body. The settings of the two enable the valve seat to be accurately guided during movement, avoiding deviation and damage;

[0019] (3) The spring has a pagoda-shaped structure, avoiding over-stress impact between the valve plate and the valve seat, and between the valve seat and the valve body, greatly extending the service life of the air valve;

[0020] (4) The internal structure of the valve body is compact and reasonably arranged, so that the clearance volume of the air valve is almost non-existent, improving the overall efficiency of the air valve;

[0021] (5) The inside of the valve body is designed with a large channel, reducing the flow rate and reducing the stress impact between the valve body and the valve seat;

[0022] (6) The valve seat and the valve body are tightly fixed at the top by threads, and are strengthened at the bottom by a locking ring and a locking pin, facilitating the disassembly and assembly of the air valve. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0024] Figure 1 is a structural schematic diagram of the present invention;

[0025] Figure 2 is Figure 1 bottom view of

[0026] 1 - locking pin, 2 - valve body, 3 - sealing gasket, 4 - valve seat, 5 - spring, 6 - valve disc, 7 - grinding sealing surface, 8 - spring guide positioning groove, 9 - valve seat guide positioning groove 9, 10 - locking ring;

[0027] 401 - nut;

[0028] 501 - small diameter end, 502 - large diameter end. Detailed implementation manners

[0029] To enable those in the technical field to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the attached drawings in the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0030] Embodiment 1

[0031] The diaphragm hydrogen compressor high - pressure suction valve, as Figure 1 and Figure 2 shown, includes a valve body 2, a valve seat 4, a valve disc 6 and a spring 5. The valve seat 4 includes a valve seat top and a valve seat bottom. The valve body 2 includes a valve body top and a valve body bottom. The valve body bottom is movably connected to the bottom of the valve seat 4, and both the valve body bottom and the valve seat bottom are grinding surfaces. The valve body bottom and the valve seat bottom cooperate to form a grinding sealing surface 7 by sealing;

[0032] The valve body 2 is provided with a spring guide positioning groove 8 and a valve seat guide positioning groove 9. The valve seat guide positioning groove 9 is arranged along the central axis of the valve body 2; the valve seat 4 slides axially along the valve seat guide positioning groove 9;

[0033] The valve body top is provided with an air inlet flow channel hole, and the gap between the valve body bottom and the valve seat bottom forms an air outlet flow channel hole;

[0034] One end of the spring 5 is in contact connection with the valve disc 6. The spring 5 and the valve disc 6 are sleeved outside the valve seat 4. The contraction of the spring 5 drives the valve disc 6 to open and close the air inlet flow channel hole.

[0035] It should be further noted that the top of the valve seat is provided with a thread and a nut 401. The nut 401 is fixedly connected to the top of the valve seat through the thread. The design of the thread and the nut 401 facilitates the disassembly of the valve body 2 and the valve seat 4. The outer diameter of the nut 401 is matched with the inner diameter of the air inlet flow channel hole to form a seal. When the thread is disassembled, there is no support at the top of the valve body 2 and the valve seat 4, so the two can be easily removed from the bottom.

[0036] It should be further noted that one end of the spring 5 is the small-diameter end 501, and the other end of the spring 5 is the large-diameter end 502. The small-diameter end 501 spirally extends along the large-diameter end 502 to make the spring 5 form a pagoda shape. The large-diameter end 502 of the pagoda-shaped spring 5 has a certain buffering effect when closing the air valve, which can reduce the impact force of the small-diameter end 501 on the top of the valve body, thereby reducing the impact force between the valve disc 6 driven by the spring 5 and the top of the valve body, and prolonging the service life of the air valve.

[0037] It should be further noted that one end of the valve disc 6 is connected to the small-diameter end 501 of the spring 5, and the other end of the valve disc 6 is pressed against the nut 401 by the action of the spring 5. The valve disc 6 is driven by the spring 5 to be pressed against the nut 401 to further seal the air inlet flow channel hole and prevent air leakage.

[0038] It should be further noted that the large-diameter end 502 of the spring 5 is fixedly connected to the spring guide positioning groove 8.

[0039] It should be further noted that the bottom of the valve body is provided with a limiting step. The limiting step is in mating connection with the bottom of the valve seat to form positioning and sealing. It cooperates with the valve seat guide positioning groove 9 to accurately guide the valve seat 4 during movement and avoid damage caused by deviation.

[0040] It should be further noted that sealing gaskets 3 are provided at both outer ends of the valve body 2. During the contact with other components of the diaphragm machine, the air valve is protected.

[0041] It should be further noted that a locking ring 10 parallel to the bottom plane of the valve seat is fixedly provided at the center of the bottom of the valve seat, and a locking pin 1 perpendicular to the bottom plane of the valve body is fixedly provided at the bottom of the valve body. The locking ring 10 is sleeved on the locking pin 1 to form a connection reinforcement state of the valve body 2 and the valve seat 4 (this state is generally the closed state to avoid air leakage and safety accidents); when the locking ring 10 is separated from the locking pin 1, it forms a relaxation and startup state of the valve body 2 and the valve seat 4 (this state is generally the working preparation state of adding gas).

[0042] When refueling with hydrogen, unlock the locking ring 10 and the locking pin 1. High-pressure hydrogen gas pushes the valve seat 4 and the valve disc 6. The valve disc 6 moves towards the bottom of the valve seat according to the compression of the spring 5. Hydrogen gas enters through the inlet flow channel hole. At this time, the bottom of the valve seat is separated from the bottom of the valve body to form an outlet flow channel hole, and the gas flows into the fuel tank of the hydrogen energy vehicle through the outlet flow channel hole, achieving the purpose of refueling. After refueling is completed, remove (close) the high-pressure hydrogen gas. At this time, the pressure on the top of the valve seat is removed, and the spring 5 rebounds, driving the valve seat 4 and the valve disc 6 to move towards the top of the valve body to close the inlet flow channel hole. Due to the precise guiding structure of the valve body 2 and the valve seat 4, deviation and damage are avoided; the spring 5 is in the shape of a pagoda, avoiding over-stress impact between the valve disc 6 and the valve seat 4, and between the valve seat 4 and the valve body 2, greatly extending the service life of the gas valve;

[0043] References to "embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

Claims

1. Diaphragm type hydrogen compressor high pressure suction valve, characterized by: It includes a valve body, a valve seat, a valve plate and a spring, wherein the valve seat includes a valve seat top and a valve seat bottom, the valve body includes a valve body top and a valve body bottom, and both the valve body bottom and the valve seat bottom are ground surfaces, and the valve body bottom and the valve seat bottom cooperate to form a ground sealing surface; A spring guide positioning groove and a valve seat guide positioning groove are provided in the valve body, and the valve seat guide positioning groove is arranged along the central axis of the valve body; the valve seat slides axially along the valve seat guide positioning groove; The top of the valve body is provided with an inlet flow passage hole, and the gap separating the bottom of the valve body and the bottom of the valve seat forms an outlet flow passage hole; One end of the spring is in contact with the valve plate, and the spring and the valve plate are sleeved outside the valve seat. The contraction of the spring drives the valve plate to open and close the intake air passage hole.

2. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 1, characterized in that: The top of the valve seat is provided with threads and a nut, and the nut is fixedly connected to the top of the valve seat through threads.

3. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 2, characterized in that: One end of the spring is a small-diameter end, and the other end of the spring is a large-diameter end. The small-diameter end is spirally extended along the large-diameter end to form the spring into a pagoda shape.

4. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 3, characterized in that: One end of the valve plate is connected to the small-diameter end of the spring, and the other end of the valve plate is pressed tightly against the nut by the action of the spring.

5. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 3, characterized in that: The large diameter end of the spring is fixedly connected to the spring guide positioning groove.

6. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 1, characterized in that: The bottom of the valve body is provided with a limiting step, and the limiting step is matched and connected with the bottom of the valve seat to form positioning and sealing.

7. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 1, characterized in that: Sealing gaskets are arranged at both ends of the outer side of the valve body.

8. The diaphragm type hydrogen compressor high pressure air intake valve according to claim 1, characterized in that: A locking ring parallel to the bottom plane of the valve seat is fixedly provided at the bottom center of the valve seat, a locking pin perpendicular to the bottom plane of the valve body is fixedly provided at the bottom of the valve body, the locking ring is sleeved on the locking pin to form a connection and reinforcement state for the valve body and the valve seat; the locking ring is separated from the locking pin to form a relaxed starting state for the valve body and the valve seat.

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