Pressure release valve

Abstract

The pressure release valve comprises a valve body, an oil inlet channel is formed in the valve body, an oil inlet is formed in one end of the oil inlet channel, an oil outlet is formed in the other end of the oil inlet channel, a communicating channel is formed in the valve body, a first opening and a second opening are formed in the communicating channel, and the first opening and the second opening both communicate with the oil inlet channel; a moving block is connected into the oil inlet channel in a sliding mode, an elastic piece is further connected into the oil inlet channel, an oil return opening is formed in the communicating channel and communicates with the end, close to the oil inlet, of the oil inlet channel, and an opening and closing assembly is connected into the oil inlet channel and used for opening or closing the oil return opening. After oil injection is completed, the elastic piece drives the movable block to move and reset, so that backflow of lubricating oil is accelerated, and pressure relief is accelerated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pressure relief devices, in particular to a pressure relief valve. BACKGROUND

[0002] With the continuous improvement of industrial automation, the application of lubricating pump and single-line distributor is more and more common, which can ensure that each part of the mechanical equipment is fully lubricated, thereby improving the operation efficiency and reliability of the equipment. However, in practical application, due to the complexity of the system and the variety of working conditions, how to effectively manage the pressure of the hydraulic system becomes an important technical problem.

[0003] In the related art, when the pipeline between the lubricating pump and the single-line distributor is too long, the time required for pressure relief is too long. CONTENT OF THE UTILITY MODEL

[0004] In order to speed up the pressure relief and improve the work efficiency, the present application provides a pressure relief valve.

[0005] The pressure relief valve provided by the present application adopts the following technical scheme:

[0006] A pressure relief valve, comprising a valve body, an oil inlet channel is formed in the valve body, an oil inlet is formed at one end of the oil inlet channel, an oil outlet is formed at the other end of the oil inlet channel, a communication channel is formed in the valve body, a first port and a second port are formed in the communication channel, the first port is in communication with the oil inlet channel, the second port is in communication with the oil inlet channel, a moving block is slidably connected in the oil inlet channel, the moving block is in contact with the inner wall of the oil inlet channel on all sides, an elastic member is further connected in the oil inlet channel, the elastic member is used to drive the moving block to slide in the oil inlet channel and control the first port to be in communication with the oil inlet, the communication channel is provided with an oil return port, the oil return port is in communication with the oil inlet channel near the oil inlet, and an opening and closing assembly is connected in the oil inlet channel, the opening and closing assembly is used to open or close the oil return port.

[0007] Through the above technical scheme, when in use, the lubricating oil enters the oil inlet channel through the oil inlet, and pushes the moving block to move along the length direction of the oil inlet channel, so that the first port is in communication with the oil inlet, the lubricating oil enters the communication channel through the first port, the lubricating oil moves along the communication channel, the lubricating oil enters the oil inlet channel through the second port, and is discharged through the oil outlet, when the oil injection is completed, the elastic member drives the moving block to move along the oil inlet channel and reset, so as to speed up the lubricating oil in the distributor to be drawn back, the returned lubricating oil enters the communication channel through the second port, the opening and closing assembly opens the oil return port, so that the lubricating oil enters the oil inlet channel through the oil return port, and the lubricating oil returns to the lubricating pump through the oil inlet, the elastic member drives the moving block to move and reset, so as to speed up the return of the lubricating oil and speed up the pressure relief.

[0008] Optionally, the opening and closing assembly comprises a first spring and a stopper, one end of the first spring is connected to the stopper, the other end of the first spring is connected to the inner wall of the oil inlet channel, a moving channel for embedding the stopper is arranged in the oil return port, the length direction of the moving channel is consistent with the length direction of the first spring, the stopper is slidably connected in the moving channel along the length direction of the moving channel, and the end of the stopper away from the first spring is in contact with the inner wall of the moving channel.

[0009] By adopting the above technical scheme, when the lubricating oil returns, the lubricating oil enters the communication channel through the second port, the lubricating oil enters the oil return port and pushes the stopper to move along the length direction of the first spring, the stopper extrudes the first spring, and the stopper is away from the oil return port, so as to facilitate the return of the lubricating oil. When in use, the lubricating oil enters the oil inlet channel through the oil inlet port, the lubricating oil pushes the stopper to move along the length direction of the first spring, and the stopper is in abutment with the inner wall of the moving channel, so as to reduce the gap between the stopper and the moving channel, and to reduce the situation that the lubricating oil enters the communication channel through the oil return port.

[0010] Optionally, one end of the moving block is connected with a mounting rod, the length direction of the mounting rod is consistent with the length direction of the oil inlet channel, the elastic member is a second spring, the length direction of the second spring is consistent with the length direction of the mounting rod, one end of the second spring is connected to the inner wall of the oil inlet channel, the other end of the second spring is connected to the moving block, and the second spring is sleeved on the mounting rod.

[0011] By adopting the above technical scheme, the mounting rod is additionally arranged, so as to reduce the capacity of the oil inlet channel and the time for the lubricating oil to enter the oil outlet port through the oil inlet channel.

[0012] Optionally, the mounting rod is provided with an oil conveying channel, the oil conveying channel is open at both ends, the oil conveying channel is in communication with the oil inlet channel at both ends, and the opening of one end of the oil conveying channel is arranged to face the oil outlet port. When oil is injected, the oil conveying channel is in communication with the second port and the oil outlet port.

[0013] By adopting the above technical scheme, when in use, the lubricating oil pushes the moving block to move along the oil inlet channel, so that the oil inlet port is in communication with the first port, and one end of the oil conveying channel is in communication with the oil outlet port and the other end is in communication with the second port. The lubricating oil enters the communication channel through the first port, moves along the communication channel, enters the oil conveying channel through the second port, moves along the oil conveying channel, and is discharged from the valve body through the oil outlet port. The oil conveying channel is additionally arranged, so that the oil conveying channel plays a guiding role in the conveying direction of the lubricating oil when the lubricating oil is discharged, and the oil discharge rate of the lubricating oil is accelerated.

[0014] Optionally, an installation port is arranged in the end inner wall of the oil inlet channel, a detachable installation plug is arranged in the installation port, and the end of the first spring away from the stopper is connected to the installation plug.

[0015] Through the above technical scheme, after long-term use, the first spring is worn out, the installation plug is detached from the installation opening, the first spring moves away from the valve body along with the installation plug, and the first spring is replaced.

[0016] Optionally, the valve body comprises a base and a connecting plug, the oil inlet channel is arranged in the base, one end of the base is provided with a connecting opening, the connecting opening is communicated with the oil inlet channel, the oil outlet is arranged in the connecting plug, the connecting plug is detachably connected to the connecting opening, and the second spring is connected to the connecting plug away from the moving block.

[0017] Through the above technical scheme, after long-term use, the second spring is worn out, the connecting plug is detached from the connecting opening, the second spring moves away from the base along with the connecting plug, and the second spring is replaced.

[0018] Optionally, the connecting opening is provided with a first sealing element, and the first sealing element is used for sealing the gap between the connecting plug and the inner wall of the connecting opening.

[0019] Through the above technical scheme, the first sealing element is added, so that the lubricating oil is prevented from flowing out of the valve body through the gap between the connecting plug and the inner wall of the connecting opening.

[0020] Optionally, the installation opening is provided with a second sealing element, and the second sealing element is used for sealing the gap between the installation plug and the inner wall of the installation opening.

[0021] Through the above technical scheme, the second sealing element is added, so that the gap between the installation plug and the inner wall of the installation opening is reduced, and the lubricating oil is prevented from leaking out of the valve body through the gap between the installation plug and the installation opening.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. After oil injection is completed, the elastic element drives the moving block to move along the oil inlet channel and reset, so as to speed up the return of the lubricating oil in the distributor, the returned lubricating oil enters the communication channel through the second opening, the opening and closing assembly opens the oil return opening, so that the lubricating oil enters the oil inlet channel through the oil return opening, the lubricating oil returns to the lubricating pump through the oil inlet, the elastic element drives the moving block to move and reset, so as to speed up the return of the lubricating oil, speed up the pressure relief, and improve the working efficiency.

[0024] 2. When the lubricating oil flows back, the lubricating oil enters the communication passage through the second port, the lubricating oil enters the oil return port and pushes the block to move along the length direction of the first spring, the block extrudes the first spring, and the block is away from the oil return port, so as to facilitate the backflow of the lubricating oil. When in use, the lubricating oil enters the oil inlet channel through the oil inlet port, the lubricating oil pushes the block, drives the block to move along the length direction of the first spring, and drives the block to abut against the inner wall of the moving channel, so as to reduce the gap between the block and the moving channel, thereby reducing the case that the lubricating oil enters the communication passage through the oil return port.

[0025] 3. After long-term use, the first spring is worn out, and when the first spring is replaced, the mounting plug is detached from the mounting port, the first spring moves with the mounting plug and is away from the valve body, so as to facilitate the replacement of the first spring. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of the embodiment.

[0027] Figure 2 is a sectional view of the embodiment.

[0028] Reference signs: 100, valve body; 200, oil inlet channel; 210, oil inlet port; 220, oil outlet port; 230, moving block; 240, connecting port; 241, first ring groove; 242, first sealing element; 250, mounting rod; 260, second spring; 270, oil conveying channel; 271, first passage; 272, second passage; 300, communication passage; 310, first port; 320, second port; 330, oil return port; 340, moving channel; 400, opening and closing assembly; 410, first spring; 420, block; 500, base; 510, mounting port; 511, second ring groove; 512, second sealing element; 520, mounting plug; 521, groove; 600, connecting plug; 610, positioning groove. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying drawings. Figures 1-2 The application is further described in detail.

[0030] The embodiment of the application discloses a pressure relief valve. Referring to Figure 1 and Figure 2 A pressure relief valve comprises a valve body 100, an oil inlet channel 200 is arranged in the valve body 100, and the length direction of the oil inlet channel 200 is consistent with the length direction of the valve body 100. An oil inlet port 210 is arranged at one end of the oil inlet channel 200 in the length direction, and the oil inlet port 210 is used for being communicated with a lubricating pump. An oil outlet port 220 is arranged at the other end of the oil inlet channel 200, and the oil outlet port 220 is used for being communicated with a single-line distributor.

[0031] Referring to Figure 1 andFigure 2 The valve body 100 is provided with a communication channel 300, the length direction of the communication channel 300 is consistent with the oil inlet channel 200, the communication channel 300 is provided with a first port 310 and a second port 320, the first port 310 and the second port 320 are in communication with the oil inlet channel 200. The oil inlet channel 200 is slidably connected with a moving block 230 and an elastic member, the moving block 230 is slidably connected in the oil inlet channel 200 along the length direction of the oil inlet channel 200, and the peripheral side of the moving block 230 is in contact with the inner wall of the oil inlet channel 200. The elastic member is used to drive the moving block 230 to be slidably connected in the oil inlet channel 200 along the length direction of the oil inlet channel 200. The communication channel 300 is provided with an oil return port 330, the oil return port 330 is in communication with the oil inlet channel 200, and the oil return port 330 is located on the side of the moving block 230 close to the oil inlet port 210. The oil inlet channel 200 is connected with an opening and closing assembly 400, and the opening and closing assembly 400 is used to open or close the oil return port 330. After the oil filling is completed, the elastic member drives the moving block 230 to move, so that the lubricating oil in the pipeline is drawn into the oil inlet channel 200, so as to speed up the pressure relief, speed up the return of the single-line distributor piston, and improve the working efficiency.

[0032] Referring to Figure 1 and Figure 2 The valve body 100 comprises a base 500 and a connecting plug 600, the oil inlet channel 200 is provided with a connecting port 240 away from the oil inlet port 210 along the length direction thereof, and the connecting port 240 is in communication with the oil outlet port 220. The connecting plug 600 is detachably connected in the connecting port 240, and the connecting plug 600 is in interference fit with the inner wall of the connecting port 240. The connecting port 240 is provided with a first annular groove 241 at the end away from the base 500, a first sealing member 242 is connected in the first annular groove 241, and the connecting plug 600 is in contact with the first sealing member 242.

[0033] Referring to Figure 1 and Figure 2 The oil outlet port 220 is provided in the connecting plug 600. The connecting plug 600 is provided with a positioning groove 610 at the end close to the base 500, one end of the positioning groove 610 is in communication with the oil inlet channel 200, and the other end of the positioning groove 610 is in communication with the oil outlet port 220.

[0034] Referring to Figure 1 and Figure 2 The moving block 230 is connected with a mounting rod 250 at the end close to the oil outlet port 220, and the length direction of the mounting rod 250 is consistent with the length direction of the oil inlet channel 200. The elastic member is a second spring 260, the length direction of the second spring 260 is consistent with the length direction of the mounting rod 250, the second spring 260 is sleeved with the mounting rod 250, one end of the second spring 260 is connected with the moving block 230 along the length direction thereof, and the other end of the second spring 260 is connected with the inner wall of the positioning groove 610. The connecting plug 600 is detachably connected in the connecting port 240, so as to facilitate the replacement of the second spring 260.

[0035] With reference to Figure 1 and Figure 2 , the mounting rod 250 is provided with an oil delivery channel 270, the oil delivery channel 270 includes a first channel 271 and a second channel 272, the length direction of the first channel 271 is consistent with the radial direction of the mounting rod 250, the first channel 271 is provided with openings at both ends along the length direction, the length direction of the second channel 272 is consistent with the length direction of the mounting rod 250, one end of the second channel 272 is communicated with the first channel 271, and the other end of the second channel 272 is provided with an opening and faces the oil outlet 220.

[0036] With reference to Figure 1 and Figure 2 , the base 500 is provided with a mounting port 510 on one side, the mounting port 510 is communicated with the oil inlet channel 200, and the mounting port 510 is arranged at one end of the oil inlet channel 200 away from the oil return port 330 along the width direction. The mounting plug 520 is detachably connected in the mounting port 510, and the mounting plug 520 is in interference fit with the inner wall of the mounting port 510. The mounting port 510 is provided with a second ring groove 511 at one end away from the oil inlet channel 200, the second ring groove 511 is connected with a second sealing element 512, and the mounting plug 520 is embedded in the second ring groove 511 at one end away from the oil inlet channel 200, and the second sealing element 512 is in contact with one end of the mounting plug 520. The first sealing element 242 and the second sealing element 512 are both copper gaskets. The mounting plug 520 is provided with a groove 521 at one end close to the oil inlet channel 200, and the groove 521 is communicated with the oil inlet channel 200.

[0037] With reference to Figure 1 and Figure 2 , the oil return port 330 is provided with a moving channel 340 at one end close to the oil inlet channel 200, the length direction of the moving channel 340 is consistent with the length direction of the oil return port 330, one end of the moving channel 340 is communicated with the oil inlet channel 200, and the width of the oil return port 330 is smaller than the width of the moving channel 340. The moving channel 340 is provided with a closed end at one end close to the communicating channel 300.

[0038] With reference to Figure 1 and Figure 2 , the opening and closing assembly 400 includes a first spring 410 and a stop block 420, the length direction of the first spring 410 is consistent with the width direction of the oil inlet channel 200, one end of the first spring 410 is connected to the inner wall of the groove 521 along the length direction, and the other end of the first spring 410 is connected to the stop block 420, and the stop block 420 is a steel ball. The stop block 420 is slidingly connected in the moving channel 340 along the length direction of the moving channel 340. The mounting plug 520 is detachably connected in the mounting port 510, so as to facilitate replacement of the first spring 410.

[0039] The implementation principle of the pressure relief valve in the embodiment of the application is as follows: in use, the lubricating oil enters the oil inlet channel 200 through the oil inlet 210, and the lubricating oil drives the moving block 230 to move along the length direction of the oil inlet channel 200, and the moving block 230 is moved to between the first port 310 and the second port 320, and the moving block 230 extrudes the second spring 260, so that the second spring 260 is deformed. The moving block 230 drives the first port 310 to communicate with the oil inlet 210, so that the lubricating oil enters the communication channel 300 through the first port 310, the lubricating oil moves along the communication channel 300, and enters the oil outlet channel 270 through the second port 320, the lubricating oil moves along the oil outlet channel 270 and is discharged through the oil outlet 220. When the oil filling is completed, the second spring 260 restores the shape and drives the moving block 230 to move along the length direction of the oil inlet channel 200, so that the lubricating oil in the pipeline is drawn into the oil inlet channel 200, so as to accelerate the pressure relief speed and improve the working efficiency.

[0040] The lubricating oil entering the oil inlet channel 200 enters the communication channel 300 through the second port 320 and the first port 310, the lubricating oil moves along the communication channel 300 and enters the oil return port 330, the lubricating oil drives the stop block 420 to move along the length direction of the moving channel 340, so that the stop block 420 is away from the oil return port 330, so that the oil return port 330 is opened, so as to facilitate the lubricating oil to enter the oil inlet channel 200 through the oil return port 330 and return to the lubricating pump through the oil inlet 210.

[0041] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A pressure relief valve characterized by: The utility model provides a valve body (100) is included in the valve body (100) inside the oil inlet channel (200) is seted up, the oil inlet channel (200) one end is seted up and is seted up the oil outlet (220) of oil inlet (210), the valve body (100) is seted up and is communicated the channel (300) in, the channel (300) is seted up and is communicated the first mouth (310) in, the second mouth (320) in the oil inlet channel (200) is communicated, the oil inlet channel (200) is slidably connected with the moving block (230), the moving block (230) all with the oil inlet channel (200) inner wall contact of week side, the oil inlet channel (200) still is connected with the elastic element, the elastic element is used for driving the moving block (230) along the oil inlet channel (200) length direction sliding connection in the oil inlet channel (200) and control first mouth (310) and oil inlet (210) communication, the channel (300) is seted up and is communicated the oil return (330) of oil inlet channel (200) is close to oil inlet (210) one end communication, the oil inlet channel (200) is connected with the opening and closing subassembly (400) in, the opening and closing subassembly (400) is used for opening or closing the oil return (330).

2. A pressure relief valve according to claim 1, characterized in that: The opening and closing subassembly (400) includes first spring (410), the stopper (420), the first spring (410) one end is connected in the stopper (420), the first spring (410) other end is connected in the oil inlet channel (200) inner wall, the oil return (330) is seted up and is embedded in the moving channel (340) of the stopper (420), the moving channel (340) length direction is identical with the first spring (410) length direction, the stopper (420) is slidably connected in the moving channel (340) along the moving channel (340) length direction, the stopper (420) is away from the first spring (410) one end and the moving channel (340) inner wall contact.

3. A pressure relief valve according to claim 1, wherein: The moving block (230) one end is connected with the installation rod (250), the installation rod (250) length direction is identical with the oil inlet channel (200) length direction, the elastic element is second spring (260) setting, the second spring (260) length direction is identical with the installation rod (250) length direction, second spring (260) one end is connected in the oil inlet channel (200) inner wall, the second spring (260) other end is connected in the moving block (230), the second spring (260) is seted up in the installation rod (250).

4. A pressure relief valve according to claim 3, wherein: The installation rod (250) is seted up and is communicated the oil delivery channel (270), the oil delivery channel (270) both ends are seted up and are opened, the oil delivery channel (270) both ends are communicated with the oil inlet channel (200), the oil delivery channel (270) one end opening is seted up and is oriented the oil outlet (220), when oil injection, the oil delivery channel (270) is communicated second mouth (320) with the oil outlet (220).

5. A pressure relief valve according to claim 2, wherein: The oil inlet channel (200) is provided with a mounting port (510) in the end inner wall, and a mounting plug (520) is detachably connected in the mounting port (510).

6. A pressure relief valve according to claim 3, wherein: The valve body (100) comprises a base (500) and a connecting plug (600), the oil inlet channel (200) is arranged in the base (500), one end of the base (500) is provided with a connecting port (240), the connecting port (240) is communicated with the oil inlet channel (200), the oil outlet (220) is arranged in the connecting plug (600), the connecting plug (600) is detachably connected in the connecting port (240), and one end of the second spring (260) away from the moving block (230) is connected to the connecting plug (600).

7. A pressure relief valve according to claim 6, wherein: The connecting port (240) is connected with a first sealing element (242), and the first sealing element (242) is used for sealing the gap between the connecting plug (600) and the inner wall of the connecting port (240).

8. A pressure relief valve according to claim 5, wherein: The mounting port (510) is connected with a second sealing element (512), and the second sealing element (512) is used for sealing the gap between the mounting plug (520) and the inner wall of the mounting port (510).

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