Proximity switch structure of hydrogen compressor

Abstract

The utility model provides a proximity switch structure of a hydrogen compressor, and belongs to the technical field of hydrogen compressors. The problems that hydraulic oil leaks when a proximity switch of a hydraulic oil cylinder piston of a traditional hydrogen compressor is disassembled, and an internal sensing part is corroded and damaged due to the fact that the end position of the proximity switch intrudes into an oil cylinder for a long time are solved. The hydraulic cylinder comprises a cylinder barrel, a cylinder cover, a piston, a proximity switch and a moving valve element, the cylinder cover is arranged at one end of the cylinder barrel, the piston is movably arranged in the cylinder barrel in the axial direction, and a moving valve element mounting hole and a proximity switch mounting hole are formed in the cylinder barrel. The proximity switch mounting hole is perpendicular to the axial direction of the moving valve element mounting hole, one end of the proximity switch mounting hole is communicated with the moving valve element mounting hole, the proximity switch is arranged in the proximity switch mounting hole, and the moving valve element is movably arranged in the valve element mounting hole in the axial direction. The hydraulic oil cylinder is mainly used in the hydrogen compressor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen compressor technical field, especially a kind of hydrogen compressor proximity switch structure. BACKGROUND

[0002] Hydrogen compressor has extensive application in industrial production, and one of its core components is hydraulic cylinder, which realizes the compression and delivery of gas through the reciprocating movement of piston. In traditional hydrogen compressor, proximity switch is usually directly installed on hydraulic cylinder, used to detect the position of piston and send reversing signal to control the movement direction of piston. However, this traditional installation method has some obvious defects.

[0003] Firstly, when proximity switch needs to be disassembled or replaced, hydraulic oil will leak during disassembly process due to the direct installation of proximity switch on oil cylinder. This not only increases the complexity of maintenance, but also may cause environmental pollution and increase the loss and maintenance cost of hydraulic oil.

[0004] Secondly, the end position of proximity switch is immersed in hydraulic oil for a long time, which is easy to be corroded and damaged by hydraulic oil. The chemicals and impurities in hydraulic oil may cause corrosion to the sensing part of proximity switch, leading to its sensitivity decline or failure, and further affecting the stability and reliability of the whole system.

[0005] In addition, the installation method of traditional proximity switch may also cause its sensing part to be mechanically impacted or bumped, especially during the movement of piston, the end of proximity switch is easy to collide with piston or other components, further increasing the damage risk of proximity switch. UTILITY MODEL CONTENTS

[0006] Therefore, the utility model aims to provide a hydrogen compressor proximity switch structure to solve the problem that the proximity switch of traditional hydrogen compressor hydraulic cylinder piston causes hydraulic oil leakage during disassembly, and the end position of proximity switch invades into oil cylinder for a long time, causing corrosion and damage to the internal sensing part.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydrogen compressor proximity switch structure, comprising cylinder barrel, cylinder cover, piston, proximity switch and movement valve core, the cylinder cover is arranged at one end of the cylinder barrel, the piston is arranged in the cylinder barrel along the axial direction, the cylinder barrel is provided with movement valve core mounting hole and proximity switch mounting hole respectively, the proximity switch mounting hole is perpendicular to the axial direction of the movement valve core mounting hole and one end is communicated with the movement valve core mounting hole, the proximity switch is arranged in the proximity switch mounting hole, the movement valve core is arranged in the valve core mounting hole along the axial direction, one end of the movement valve core passes through the movement valve core mounting hole and is in contact with the piston, and the end of the proximity switch is matched with the movement valve core.

[0008] Further, one end of the motion valve core mounting hole is provided with a plug.

[0009] Further, a variable diameter section is arranged on the motion valve core, and the end of the proximity switch is matched with the variable diameter section of the motion valve core.

[0010] Further, a reset spring is connected between one end of the variable diameter section of the motion valve core and the plug, the reset spring is sleeved on the motion valve core, one end of the reset spring is connected with the plug, and the other end of the reset spring is connected with the variable diameter section of the motion valve core.

[0011] Further, the cylinder barrel and the cylinder cover are connected through a flange.

[0012] Further, the piston is connected with a piston rod at both ends, and the piston rod at one end of the piston penetrates through the cylinder cover and is in sliding fit with the cylinder cover.

[0013] Further, the proximity switch mounting hole is provided with a first insert and a second insert, the first insert is arranged at the bottom of the second insert, the first insert and the second insert are sleeved on the outside of the proximity switch, the inner wall of the first insert is in sliding fit with the outer wall of the proximity switch, and the inner wall of the second insert is connected with the outer wall of the proximity switch through threads.

[0014] Further, the cylinder barrel and the cylinder cover are made of 45# steel.

[0015] Further, the motion valve core is made of 45# steel.

[0016] Further, the end sensing range of the proximity switch is 0mm to 1.5mm.

[0017] Compared with the prior art, the hydrogen compressor proximity switch structure has the advantages that:

[0018] 1. The hydrogen compressor proximity switch structure is characterized in that the proximity switch is mounted on the cylinder cover of an oil cylinder, and the position of the piston is fed back by the contact between the motion valve core and the piston, so that the proximity switch is prevented from being directly contacted with hydraulic oil in the oil cylinder, the hydraulic oil in the oil cylinder is prevented from being leaked when the proximity switch is disassembled, and the oil loss and environmental pollution in the maintenance process are reduced.

[0019] 2. The hydrogen compressor proximity switch structure is characterized in that the proximity switch is mounted on an oil-free end cover, the direct contact between the proximity switch and hydraulic oil is avoided, the corrosion of the proximity switch by the hydraulic oil is effectively prevented, the service life of the proximity switch is prolonged, and the reliability of the system is improved.

[0020] 3. The utility model provides a kind of hydrogen compressor proximity switch structure, the stable work of proximity switch is ensured by the design of moving valve core and reset spring, moving valve core can be freely axially moved in the moving valve core mounting hole of cylinder cover, and reset is carried out by reset spring, the accurate contact between proximity switch and moving valve core is ensured, the end of proximity switch is controlled within 1.5mm in the range of perception, further improve detection accuracy and response speed, ensure the accuracy and timeliness of oil cylinder piston reversing.

[0021] 4, the utility model provides a kind of hydrogen compressor proximity switch structure, proximity switch is no longer directly installed on oil cylinder, but is connected with end cover by bushing, installation and disassembly process are more simple and convenient, the height of proximity switch can be adjusted by second bushing, facilitate installation and maintenance operation, reduce maintenance time and cost.

[0022] 5, the utility model provides a kind of hydrogen compressor proximity switch structure, by the design of moving valve core, avoid proximity switch directly with piston contact, reduce the risk of mechanical impact and knock, further protect the perception part of proximity switch, prolong its service life. DRAWINGS

[0023] The drawings that constitute part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model.In the drawings:

[0024] Fig. 1 It is the overall structure schematic diagram of a kind of hydrogen compressor proximity switch structure described in the utility model;

[0025] Fig. 2 It is the partial structure enlarged view of a kind of hydrogen compressor proximity switch structure described in the utility model.

[0026] 1-cylinder barrel, 2-piston, 3-piston rod, 4-cylinder cover, 5-flange, 6-proximity switch, 7-first bushing, 8-second bushing, 9-moving valve core, 10-reset spring, 11-screw plug. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model.It should be noted that the embodiment in the utility model and the features in the embodiment can be combined mutually in the case where there is no conflict, and the described embodiment is only a part of the embodiment of the utility model, not all the embodiment.

[0028] Reference Figs. 1-2The embodiment is illustrated by a hydrogen compressor proximity switch structure, which comprises a cylinder 1, a cylinder cover 4, a piston 2, a proximity switch 6 and a moving valve core 9. The cylinder cover 4 is arranged at one end of the cylinder 1, and the piston 2 is arranged in the cylinder 1 and moves in the axial direction. The cylinder 1 is provided with a moving valve core mounting hole and a proximity switch mounting hole, respectively. The proximity switch mounting hole is arranged perpendicular to the axial direction of the moving valve core mounting hole and one end of the proximity switch mounting hole is communicated with the moving valve core mounting hole. The proximity switch 6 is arranged in the proximity switch mounting hole, and the moving valve core 9 is arranged in the valve core mounting hole and moves in the axial direction. One end of the moving valve core 9 penetrates the moving valve core mounting hole and is in contact with the piston 2. The end of the proximity switch 6 is matched with the moving valve core 9. By installing the proximity switch 6 on the cylinder cover 4 of the oil cylinder and feeding back the position of the piston 2 through the contact between the moving valve core 9 and the piston, the direct contact between the proximity switch 6 and the hydraulic oil in the oil cylinder is avoided. When the proximity switch 6 is disassembled, the hydraulic oil in the oil cylinder will not leak, reducing the oil loss and environmental pollution during maintenance.

[0029] In the embodiment, the proximity switch 6 is installed on the oil-free end cover 4, avoiding the direct contact between the proximity switch 6 and the hydraulic oil, effectively preventing the corrosion of the hydraulic oil on the proximity switch 6, prolonging the service life of the proximity switch 6 and improving the reliability of the system.

[0030] In the embodiment, the design of the moving valve core 9 avoids the direct contact between the proximity switch 6 and the piston 2, reduces the risk of mechanical impact and collision, further protects the sensing part of the proximity switch and prolongs the service life of the proximity switch.

[0031] In the embodiment, one end of the moving valve core mounting hole is provided with a plug 11, which is arranged at one end of the moving valve core 9 mounting hole and used for plugging the reset spring 10.

[0032] In the embodiment, the moving valve core 9 is provided with a variable diameter section, the end of the proximity switch 6 is matched with the variable diameter section of the moving valve core 9, and the distance between the variable diameter section of the moving valve core 9 and the end of the proximity switch 6 is within the sensing range of the proximity switch 6. When the variable diameter section of the moving valve core 9 approaches the proximity switch 6, the proximity switch 6 is powered on and sends a reversing signal to the system, so that the piston 2 is reversed.

[0033] The variable diameter section of the moving valve core 9 is connected with the threaded sleeve 11 through a reset spring 10 in the embodiment, the reset spring 10 is sleeved on the moving valve core 9, one end of the reset spring 10 is connected with the threaded sleeve 11, the other end of the reset spring 10 is connected with the variable diameter section of the moving valve core 9, the reset spring 10 is used for resetting the moving valve core 9, through the design of the moving valve core 9 and the reset spring 10, the stable work of the proximity switch is ensured, the moving valve core 9 can move axially freely in the moving valve core mounting hole of the cylinder cover 4 and is reset through the reset spring 10, and the accurate contact between the proximity switch and the moving valve core is ensured.

[0034] The reset spring 10 is made of spring steel and has good elasticity and durability, so that the moving valve core 9 can be reset in time.

[0035] The cylinder barrel 1 and the cylinder cover 4 are connected through a flange 5 in the embodiment, and the flange 5 is used for connecting and fixing the cylinder barrel 1 and the cylinder cover 4.

[0036] Both ends of the piston 2 are connected with piston rods 3 in the embodiment, the piston rod 3 at one end of the piston 2 penetrates through the cylinder cover 4 and is in sliding fit with the cylinder cover 4, and a sealing structure is arranged between the piston rod 3 and the cylinder cover 4, so as to ensure the sealing property of the connection.

[0037] The first insert sleeve 7 and the second insert sleeve 8 are arranged in the proximity switch mounting hole in the embodiment, the first insert sleeve 7 is arranged at the bottom of the second insert sleeve 8, the first insert sleeve 7 and the second insert sleeve 8 are sleeved on the outside of the proximity switch 6, the inner wall of the first insert sleeve 7 is in sliding fit with the outer wall of the proximity switch 6, and the inner wall of the second insert sleeve 8 is connected with the outer wall of the proximity switch 6 through threads, the first insert sleeve 7 is used for sealing between the proximity switch 6 and the proximity switch mounting hole, and the second insert sleeve 8 is used for adjusting the height of the proximity switch 6, the tail end of the proximity switch 6 is rotated, and the height of the proximity switch 6 is adjusted through the threads between the proximity switch 6 and the second insert sleeve 8.

[0038] The proximity switch 6 is connected with the cylinder cover 4 through the insert sleeve in the embodiment, so that when the proximity switch 6 is disassembled or replaced, the hydraulic oil will not leak, the oil consumption and environmental pollution in the maintenance process are reduced, the installation and disassembly process is more convenient, the height of the proximity switch can be adjusted through the second insert sleeve 8, the installation and maintenance operations are facilitated, and the maintenance time and cost are reduced.

[0039] The cylinder barrel 1 and the cylinder cover 4 are made of 45# steel in the embodiment, have good strength and wear resistance, and can withstand high pressure and frequent piston movement.

[0040] The material of the moving valve core 9 in the embodiment is 45# steel, and the moving valve core 9 has good coaxiality and surface roughness, so that the moving valve core 9 can freely move axially in the moving valve core mounting hole of the cylinder cover 4.

[0041] The end sensing range of the proximity switch 6 in the embodiment is 0mm to 1.5mm, so that the detection accuracy and response speed are further improved, and the accuracy and timeliness of the reversing of the oil cylinder piston 2 are ensured.

[0042] The working principle of the embodiment is as follows:

[0043] When the hydrogen compressor works, the piston 2 moves axially and reciprocally in the cylinder barrel 1, and the moving valve core 9 is stopped at the rightmost side of the moving valve core mounting hole under the action of the reset spring 10, at this time, one end of the moving valve core 9 penetrates through the moving valve core mounting hole and extends in the cylinder barrel 1, when the piston 2 moves to the left, the piston 2 will contact the end of the moving valve core 9, and push the moving valve core 9 to move to the left, at this time, the movement of the moving valve core 9 will compress the reset spring 10, when the variable diameter section of the moving valve core 9 approaches the proximity switch 6, the proximity switch 6 is electrified, and sends a reversing signal to the system, so that the piston 2 reverses.

[0044] After the piston 2 reverses, the reset spring 10 pushes the moving valve core 9 back to the original position, so that the variable diameter section of the moving valve core 9 gradually moves away from the end of the proximity switch 6 and keeps a proper contact distance, the end sensing range of the proximity switch 6 is controlled within 0mm to 1.5mm, so that the detection accuracy and response speed are ensured.

[0045] The above disclosed embodiments of the utility model are only used for helping to set forth the utility model. The embodiments do not describe all the details, and do not limit the utility model to the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, so as to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A hydrogen compressor proximity switch structure, characterized by: It includes cylinder (1), cylinder cover (4), piston (2), proximity switch (6) and motion valve core (9), the cylinder cover (4) sets one end of cylinder (1), the piston (2) is set in cylinder (1) along axial movement, the cylinder (1) is respectively provided with motion valve core mounting hole and proximity switch mounting hole, the proximity switch mounting hole is perpendicular to the axial direction of motion valve core mounting hole and one end is communicated with motion valve core mounting hole, the proximity switch (6) is set in proximity switch mounting hole, the motion valve core (9) is set in valve core mounting hole along axial movement, one end of the motion valve core (9) passes through the motion valve core mounting hole and is in contact with the piston (2), the end of the proximity switch (6) is matched with the motion valve core (9).

2. A hydrogen compressor proximity switch structure according to claim 1, characterized by: One end of the motion valve core mounting hole is provided with a plug (11).

3. The hydrogen compressor proximity switch structure of claim 2, wherein: The motion valve core (9) is provided with a variable diameter section, and the end of the proximity switch (6) is matched with the variable diameter section of the motion valve core (9).

4. The hydrogen compressor proximity switch structure of claim 3, wherein: The variable diameter section of the motion valve core (9) is connected with the plug (11) through a reset spring (10), the reset spring (10) is sleeved on the motion valve core (9), one end of the reset spring (10) is connected with the plug (11), and the other end of the reset spring (10) is connected with the variable diameter section of the motion valve core (9).

5. The hydrogen compressor proximity switch structure of claim 1, wherein: The cylinder (1) and the cylinder cover (4) are connected through a flange (5).

6. The hydrogen compressor proximity switch structure of claim 1, wherein: Both ends of the piston (2) are connected with piston rods (3), and the piston rod (3) at one end of the piston (2) penetrates through the cylinder cover (4) and is in sliding fit with the cylinder cover (4).

7. The hydrogen compressor proximity switch structure of claim 1, wherein: The proximity switch mounting hole is provided with a first bushing (7) and a second bushing (8), the first bushing (7) is arranged at the bottom of the second bushing (8), the first bushing (7) and the second bushing (8) are sleeved on the outside of the proximity switch (6), the inner wall of the first bushing (7) and the outer wall of the proximity switch (6) are in sliding fit, and the inner wall of the second bushing (8) and the outer wall of the proximity switch (6) are connected through threads.

8. The hydrogen compressor proximity switch structure of claim 1, wherein: The material of the cylinder (1) and the cylinder cover (4) is 45# steel.

9. The hydrogen compressor proximity switch structure of claim 1, wherein: The material of the motion valve core (9) is 45# steel.

10. The hydrogen compressor proximity switch structure of claim 1, wherein: The sensing range of the end of the proximity switch (6) is 0mm to 1.5mm.

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