Adjustable-pressure nitrogen check valve for piston accumulator

Abstract

The present invention provides an adjustable-pressure nitrogen check valve for a piston accumulator, which relates to the technical field of check valves and includes: a main valve body, the lower part of the outer part of the main valve body is a threaded structure; side square seats are integrally arranged on both sides of the main valve body, and a U-shaped groove is opened in the middle of the side square seats; a driven short shaft, the driven short shaft is rotatably arranged in the U-shaped groove; a top pipe body, the side of the top pipe body is a flange structure, and the flange structure fits with the top of the main valve body; a gas control channel is provided, which provides the function of adjusting the input nitrogen pressure. When it is necessary to adjust the pressure of nitrogen to open the bottom sealing valve, rotate the propulsion screw outside the gas control channel, push the piston push piece, and input the air in the gas control channel into the gas spring part, so as to enhance the rebound ability of the gas spring part. Thus, the sealing performance of the bottom sealing valve can be adjusted and enhanced, realizing the protection and sealing of nitrogen, and solving the problem that the pressure of the currently used check valve is inconvenient to adjust when inputting nitrogen.

Description

Technical Field

[0001] The present invention relates to the technical field of check valves, and particularly to an adjustable-pressure nitrogen check valve for a piston accumulator. Background Art

[0002] An accumulator is an energy storage device in a hydraulic and pneumatic system. It stores the energy in the system as compressed energy or potential energy at an appropriate time. The piston accumulator has a cylindrical structure, and a check valve is required to limit the top of the accumulator to resist the pressure generated when compressing nitrogen and achieve check valve function.

[0003] The currently used check valves have the following disadvantages:

[0004] 1. The currently used check valves are inconvenient to adjust the pressure when inputting nitrogen to limit the nitrogen pressure.

[0005] 2. Lack of an anti-loosening function that can be automatically locked during installation.

[0006] 3. Lack of a release function that does not affect the pipeline sealing performance. Summary of the Invention

[0007] In view of this, the present invention provides an adjustable-pressure nitrogen check valve for a piston accumulator, which has a gas spring member to provide a check valve function.

[0008] The present invention provides an adjustable-pressure nitrogen check valve for a piston accumulator, which specifically includes: a main valve body, the lower part of the outside of the main valve body is a threaded structure; side square seats are integrally arranged on both sides of the main valve body, and a U-shaped groove is opened in the middle of the side square seats; a driven short shaft, the driven short shaft is rotatably arranged in the U-shaped groove; a top pipe body, the side of the top pipe body is a flange structure, the flange structure fits with the top of the main valve body, and the top pipe body is fixedly connected to the top of the main valve body by bolts; four groups of bottom supports are integrally arranged at the inner bottom of the top pipe body, a gas spring member is fixedly arranged on the top of the bottom supports, and a lifting disc is fixedly arranged on the top of the gas spring member; a fixed inner pipe, the fixed inner pipe is fixedly arranged inside the main valve body; an intermediate pull rod, the top of the intermediate pull rod is fixedly arranged on the top of the lifting disc.

[0009] Optionally, the main valve body further includes: a positioning flange, the positioning flange is integrally arranged on the outside of the main valve body, and a rubber block is embedded around the bottom of the positioning flange.

[0010] Optionally, the driven short shaft includes: an eccentric wheel, an eccentric wheel is fixedly arranged at one end of the driven short shaft inside the main valve body; a driven worm gear, a driven worm gear is fixedly arranged on the outside of one end of the driven short shaft outside the main valve body; a scale disc, a scale disc is fixedly arranged at one end of the driven short shaft outside the main valve body, and the scale disc is located in the U-shaped groove.

[0011] Optionally, a transmission worm is rotatably arranged at the inner top of the U-shaped groove, one end of the transmission worm passes through the U-shaped groove and is provided with a hexagonal end cap; the transmission worm and the driven worm wheel are connected in transmission; the two sets of transmission worms are rotated by using a hexagonal wrench, and the two sets of transmission worms rotate simultaneously to drive the driven worm wheel to rotate, thereby driving the driven short shaft and the eccentric wheel to rotate, and the eccentric wheel is used to press the outer slip ring downward, and the spring rod moves downward synchronously, pressing the locking turn block, and the locking turn block is pushed to the side, thereby achieving locking of the check valve.

[0012] Optionally, the top tube body also includes: an air control channel, an air control channel is integrally provided on one side of the top tube body, and a channel is opened at the bottom of the air control channel near the top tube body to communicate with four groups of gas spring components; an oil control channel, an oil control channel is integrally provided on one side of the top tube body; a piston push piece, piston push pieces are slidably provided inside the air control channel and the oil control channel; a propulsion screw, a propulsion screw is provided outside the air control channel and the oil control channel; a handwheel component, the outer end of the propulsion screw is a quadrilateral column structure, and a handwheel component is provided on the outer side of the quadrilateral column structure; a built-in channel, a built-in channel is fixedly provided inside the top tube body, and a telescopic oil cylinder is fixedly provided in the middle of the bottom of the built-in channel; the built-in channel is connected to the oil control channel; the gas spring component provides a reverse The elastic capacity is used to push the lifting and pulling disc upwards, pull the middle pull rod and the bottom sealing valve, and cooperate with the sealing ring to separate the inside of the main valve body to ensure that nitrogen can only be transported from top to bottom; when it is necessary to adjust the pressure of the nitrogen to open the bottom sealing valve, the pushing screw outside the air control channel is turned to push the piston push piece, and the air in the air control channel is input into the gas spring component, so as to enhance the rebound capacity of the gas spring component; thereby, the sealing of the bottom sealing valve can be adjusted and enhanced; hydraulic oil is preset in the oil control channel. When it is necessary to release the pressure, the pushing screw outside the oil control channel is turned to push the piston push piece, and the hydraulic oil in the oil control channel is input into the built-in channel, so as to open the telescopic cylinder downward, press the lifting and pulling disc downward, and then press the bottom sealing valve downward to release the nitrogen.

[0013] Optionally, the fixed inner tube includes: an outer slip ring, the upper and lower ends of the outer part of the fixed inner tube are both flange structures, an outer slip ring is slidably arranged in the middle of the outer part of the fixed inner tube, four groups of spring rods are fixedly arranged at the bottom of the outer slip ring, the spring rods are sleeved with springs and pass through the flange structure at the lower part of the outer part of the fixed inner tube to fix a limiting circular ring.

[0014] Optionally, the middle pull rod comprises: a bottom sealing valve, a bottom sealing valve is fixedly provided at the bottom of the middle pull rod, and a sealing ring is fixedly provided at the top side of the bottom sealing valve.

[0015] Optionally, four groups of notches are provided around the bottom of the main valve body, and locking rotating blocks are rotatably arranged in the middle of the notches, and the top of the locking rotating block is arranged as an inclined block structure turning inward.

[0016] The beneficial effects are as follows:

[0017] 1. An air control channel is set to provide the function of adjusting the input nitrogen pressure. When it is necessary to adjust the pressure of the nitrogen to open the bottom sealing valve, the advancing screw outside the air control channel is turned to advance the piston push piece, and the air in the air control channel is input into the gas spring component, so that the rebound ability of the gas spring component can be enhanced, thereby adjusting and enhancing the sealing of the bottom sealing valve to achieve protection and sealing of nitrogen.

[0018] 2. A locking rotary block is provided to provide an automatic locking and anti-loosening function. The two sets of transmission worms are rotated with an inner hexagonal wrench. The two sets of transmission worms rotate simultaneously to drive the driven worm gears to rotate, and then drive the driven short shaft and the eccentric wheel to rotate. The eccentric wheel is used to press the outer slip ring downward, and the spring rod moves downward synchronously to press the locking rotary block, which is pushed to the side to achieve locking of the check valve.

[0019] 3. An oil control channel is set up to provide a release function that does not affect the sealing of the pipeline. When the pressure needs to be released, the push screw outside the oil control channel is turned to push the piston push piece, and the hydraulic oil in the oil control channel is input into the built-in channel. The telescopic cylinder is pushed downward, and the lifting disc is pressed downward, and then the bottom sealing valve is pressed downward to release the nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a three-dimensional structure according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of a side tilt structure according to an embodiment of the present invention is shown;

[0022] Figure 3 A schematic diagram of a three-dimensional cross-sectional structure according to an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram of the internal structure of an embodiment of the present invention is shown;

[0024] Figure 5 It shows a schematic diagram of the installation position structure according to an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of a driven short shaft according to an embodiment of the present invention is shown;

[0026] Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a top tube body according to an embodiment of the present invention is shown;

[0027] Figure 8 A schematic diagram of a side elevation cross-sectional structure of a fixed inner tube according to an embodiment of the present invention is shown.

[0028] Reference numerals list

[0029] 1. Main valve body; 101. Side square seat; 102. U-shaped groove; 103. Positioning flange; 104. Rubber block; 2. Driven short shaft; 201. Eccentric wheel; 202. Driven worm gear; 203. Scale disc; 3. Transmission worm; 4. Top tube body; 401. Air control channel; 402. Oil control channel; 403. Piston push piece; 404. Push screw; 405. Handwheel; 406. Bottom support seat; 407. Gas spring; 408. Lifting disc; 409. Built-in channel; 410. Telescopic cylinder; 5. Fixed inner tube; 501. Outer sliding ring; 502. Spring rod; 503. Limiting ring; 6. Middle pull rod; 601. Bottom sealing valve; 602. Sealing ring; 7. Locking rotary block. DETAILED DESCRIPTION

[0030] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0031] Embodiment 1:

[0032] Please refer to Figures 1 to 8 As shown:

[0033] The present invention proposes an adjustable pressure nitrogen check valve for a piston accumulator, comprising: a main valve body 1, the outer lower part of the main valve body 1 is a threaded structure; side square seats 101 are integrally arranged on both sides of the main valve body 1, and a U-shaped groove 102 is opened in the middle of the side square seat 101; a driven short shaft 2, the driven short shaft 2 is rotatably arranged in the U-shaped groove 102; a top tube body 4, the side of the top tube body 4 is a flange structure, the flange structure is consistent with the top of the main valve body 1, and the top tube body 4 is fixedly connected to the top of the main valve body 1 with bolts; four groups of bottom support seats 406 are integrally arranged on the inner bottom of the top tube body 4, the top of the bottom support seat 406 is fixedly arranged with a gas spring component 407, and the top of the gas spring component 407 is fixedly arranged with a lifting disc 408; a fixed inner tube 5, the fixed inner tube 5 is fixedly arranged inside the main valve body 1; an intermediate pull rod 6, the top of the intermediate pull rod 6 is fixedly arranged on the top of the lifting disc 408.

[0034] The main valve body 1 further comprises: a positioning flange 103 . The positioning flange 103 is integrally arranged on the outside of the main valve body 1 , and a rubber block 104 is embedded around the bottom of the positioning flange 103 .

[0035] Among them, the driven short shaft 2 includes: an eccentric wheel 201, with an eccentric wheel 201 fixedly arranged at one end of the driven short shaft 2 located inside the main valve body 1; a driven worm wheel 202, with a driven worm wheel 202 fixedly arranged outside one end of the driven short shaft 2 located outside the main valve body 1; a scale disc 203, with a scale disc 203 fixedly arranged outside one end of the driven short shaft 2 located outside the main valve body 1, and the scale disc 203 is located inside the U-shaped groove 102.

[0036] Among them, a transmission worm 3 is rotatably arranged at the inner top of the U-shaped groove 102. One end of the transmission worm 3 passes through the U-shaped groove 102 and is provided with an internal hexagonal end; the transmission worm 3 is in driving connection with the driven worm wheel 202.

[0037] Among them, the top tube body 4 further includes: an air control channel 401, with an air control channel 401 integrally arranged on one side of the top tube body 4. At a position close to the top tube body 4, a channel is opened at the bottom of the air control channel 401 and communicated with four air spring members 407; an oil control channel 402, with an oil control channel 402 integrally arranged on one side of the top tube body 4; a piston push piece 403, with a piston push piece 403 slidably arranged inside both the air control channel 401 and the oil control channel 402; a propulsion screw 404, with a propulsion screw 404 arranged outside both the air control channel 401 and the oil control channel 402; a hand wheel member 405, with the outer end of the propulsion screw 404 being a quadrilateral column structure, and a hand wheel member 405 is clamped outside the quadrilateral column structure; an internal channel 409, with an internal channel 409 fixedly arranged inside the top tube body 4, and a telescopic oil cylinder 410 fixedly arranged in the middle at the bottom of the internal channel 409; the internal channel 409 is communicated with the oil control channel 402.

[0038] Among them, the fixed inner tube 5 includes: an outer sliding ring 501, with both the upper and lower ends of the outside of the fixed inner tube 5 being flange structures. An outer sliding ring 501 is slidably arranged in the middle of the outside of the fixed inner tube 5. Four spring rods 502 are fixedly arranged at the bottom of the outer sliding ring 501, and the spring rods 502 are sleeved with springs and pass through the flange structure at the lower part of the outside of the fixed inner tube 5 and a limit ring 503 is fixedly arranged.

[0039] Among them, the middle pull rod 6 includes: a bottom sealing valve 601, with a bottom sealing valve 601 fixedly arranged at the bottom of the middle pull rod 6, and a sealing ring 602 is fixedly arranged on the top side of the bottom sealing valve 601.

[0040] Among them, four notches are opened around the bottom of the main valve body 1, and a locking rotating block 7 is rotatably arranged in the middle of each notch. The top of the locking rotating block 7 is set as an inclined block structure that turns inwards.

[0041] During installation, the main valve body 1 is threadedly connected and fixed on the top of the accumulator, and the two sets of transmission worm gears 3 are rotated with an inner hexagonal wrench. The two sets of transmission worm gears 3 rotate simultaneously to drive the driven worm gear 202 to rotate, and then drive the driven short shaft 2 and the eccentric wheel 201 to rotate. The eccentric wheel 201 is used to press the outer slip ring 501 downward, and the spring rod 502 moves downward synchronously, pressing the locking turn block 7, and the locking turn block 7 is pushed to the side, thereby locking the check valve.

[0042] Embodiment 2:

[0043] On the basis of Example 1, Figure 7 As shown, the gas spring member 407 provides rebound capability;

[0044] The lifting disc 408 is pushed upward, the middle pull rod 6 and the bottom sealing valve 601 are pulled, and the sealing ring 602 is used to isolate the interior of the main valve body 1 to ensure that nitrogen can only be transported from top to bottom; when it is necessary to adjust the pressure of the nitrogen to open the bottom sealing valve 601, the advancing screw 404 outside the air control channel 401 is rotated, the piston push piece 403 is pushed, and the air in the air control channel 401 is input into the gas spring component 407, so as to enhance the rebound ability of the gas spring component 407; thereby, the sealing of the bottom sealing valve 601 can be adjusted and enhanced; hydraulic oil is preset in the oil control channel 402, and when the pressure needs to be released, the advancing screw 404 outside the oil control channel 402 is rotated, the piston push piece 403 is pushed, and the hydraulic oil in the oil control channel 402 is input into the built-in channel 409, the telescopic cylinder 410 is opened downward, the lifting disc 408 is pressed downward, and then the bottom sealing valve 601 is pressed downward to release the nitrogen.

[0045] Embodiment 3:

[0046] On the basis of Example 1, Figure 3 As shown, hydraulic oil is preset in the oil control channel 402 to facilitate remote control.

[0047] When the pressure needs to be released, the push screw 404 outside the oil control channel 402 is rotated to push the piston push piece 403, and the hydraulic oil in the oil control channel 402 is input into the built-in channel 409, the telescopic cylinder 410 is pushed downward, and the lifting disc 408 is pressed downward, and then the bottom sealing valve 601 is pressed downward to release the nitrogen.

[0048] Specific usage and function of this embodiment: In the present invention, when in use, the side square seat 101 is clamped by a pipe clamp, the main valve body 1 is threadedly connected and fixed on the top of the accumulator, and then energy is stored, nitrogen is input from the top of the main valve body 1, passes through the inside of the fixed inner tube 5, and then the bottom sealing valve 601 is opened, and then nitrogen is input into the accumulator, and then compressed;

[0049] Use the hexagonal wrench to rotate the two sets of transmission worms 3. The two sets of transmission worms 3 rotate simultaneously to drive the driven worm wheel 202 to rotate, and then drive the driven short shaft 2 and the eccentric wheel 201 to rotate. Use the eccentric wheel 201 to press the outer slip ring 501 downward, and the spring rod 502 moves downward synchronously to press the locking rotating block 7, and the locking rotating block 7 is stretched to the side, thereby locking the check valve;

[0050] The gas spring component 407 provides rebound ability, pushes the lifting disc 408 upward, pulls the middle pull rod 6 and the bottom sealing valve 601, and cooperates with the sealing ring 602 to isolate the inside of the main valve body 1, ensuring that nitrogen can only be transported from top to bottom; when it is necessary to adjust the pressure of the nitrogen to open the bottom sealing valve 601, rotate the advancing screw 404 outside the air control channel 401, advance the piston push piece 403, and input the air in the air control channel 401 into the gas spring component 407, so as to enhance the rebound ability of the gas spring component 407; thereby, the sealing performance of the bottom sealing valve 601 can be adjusted and enhanced;

[0051] Hydraulic oil is preset in the oil control channel 402. When the pressure needs to be released, the pushing screw 404 outside the oil control channel 402 is rotated to push the piston push piece 403, and the hydraulic oil in the oil control channel 402 is input into the built-in channel 409, so that the telescopic cylinder 410 is pushed downward, and the lifting disc 408 is pressed downward, and then the bottom sealing valve 601 is pressed downward to release the nitrogen.

Claims

1. An adjustable-pressure nitrogen check valve for a piston accumulator, comprising: Main valve body (1), the lower part of the outside of the main valve body (1) is a threaded structure; on both sides of the main valve body (1), there are integrally arranged side square seats (101), and a U-shaped groove (102) is opened in the middle of the side square seats (101); driven short shaft (2), the driven short shaft (2) is rotatably arranged in the U-shaped groove (102); characterized in that, one end of the driven short shaft (2) outside the main valve body (1) is fixedly provided with a scale disc (203), and the scale disc (203) is located in the U-shaped groove (102); top tube body (4), the side of the top tube body (4) is a flange structure, the flange structure fits with the top of the main valve body (1), and the top tube body (4) is fixedly connected to the top of the main valve body (1) by bolts; at the inner bottom of the top tube body (4), there are integrally arranged four groups of bottom brackets (406), on the top of the bottom brackets (406), there is fixedly provided a gas spring part (407), and on the top of the gas spring part (407), there is fixedly provided a lifting disc (408); fixed inner tube (5), the fixed inner tube (5) is fixedly arranged inside the main valve body (1); intermediate pull rod (6), the top of the intermediate pull rod (6) is fixedly arranged on the top of the lifting disc (408); the top tube body (4) further includes: air control channel (401), on one side of the top tube body (4), there is integrally arranged an air control channel (401), at a position close to the top tube body (4) at the bottom of the air control channel (401), there is opened a channel communicating with the four groups of gas spring parts (407); oil control channel (402), on one side of the top tube body (4), there is integrally arranged an oil control channel (402); piston push piece (403), a piston push piece (403) is slidably arranged inside both the air control channel (401) and the oil control channel (402); propulsion screw (404), a propulsion screw (404) is arranged outside both the air control channel (401) and the oil control channel (402); the built-in channel (409) communicates with the oil control channel (402).

2. The adjustable-pressure nitrogen check valve for a piston accumulator according to claim 1, characterized in that, The main valve body (1) further includes: Positioning flange (103), on the outside of the main valve body (1), there is integrally arranged a positioning flange (103), and a rubber block (104) is embedded around the bottom of the positioning flange (103).

3. The adjustable-pressure nitrogen check valve for a piston accumulator according to claim 1, characterized in that, On the inner top of the U-shaped groove (102), there is rotatably arranged a driving worm (3), one end of the driving worm (3) passes out of the U-shaped groove (102) and is provided with an inner hexagonal end; the driving worm (3) is in transmission connection with the driven worm gear (202).

4. The adjustable pressure nitrogen check valve for the piston accumulator according to claim 1, characterized in that, The outer end of the propulsion screw (404) is a quadrilateral column structure, and a handwheel part (405) is clamped outside the quadrilateral column structure.

5. The adjustable-pressure nitrogen check valve for a piston accumulator according to claim 1, wherein Inside the top tube body (4), there is fixedly arranged a built-in channel (409), and in the middle of the bottom of the built-in channel (409), there is fixedly arranged a telescopic oil cylinder (410).

6. The adjustable-pressure nitrogen check valve for a piston accumulator according to claim 1, wherein, The upper and lower ends of the outer part of the fixed inner tube (5) are both flange structures. An outer sliding ring (501) is slidably arranged in the middle of the outer part of the fixed inner tube (5). Four spring rods (502) are fixedly arranged at the bottom of the outer sliding ring (501). The spring rods (502) are sleeved with springs and pass through the flange structure at the lower part of the outer part of the fixed inner tube (5), and a limit ring (503) is fixedly arranged.

7. The adjustable pressure nitrogen check valve for a piston accumulator according to claim 1, characterized in that, The middle pull rod (6) includes: A bottom sealing valve (601). A bottom sealing valve (601) is fixedly arranged at the bottom of the middle pull rod (6). A sealing ring (602) is fixedly arranged on the top side of the bottom sealing valve (601).

8. The adjustable-pressure nitrogen check valve for a piston accumulator according to claim 1, characterized in that Four notches are formed around the bottom of the main valve body (1). Locking rotating blocks (7) are rotatably arranged in the middle of the notches. The top of the locking rotating block (7) is set as an inclined block structure that turns inward.

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