A delay valve

Abstract

The utility model discloses a kind of delay valves, wherein, sleeve body has coaxially arranged first sleeve section, the inner side wall of first sleeve section is equipped with air inlet, air inlet is connected for switching the working port of the reversing valve structure of two cylinder cavities air intake and exhaust of cylinder.The plunger has coaxially arranged first column section and second column section.First column section is arranged in first sleeve section, and annular airflow passage is formed between the outer circumferential wall of first column section and the inner circumferential wall of first sleeve section.The outer side wall of first column section is equipped with air outlet, and air outlet is connected with outside.Second column section blocks one end of first sleeve section.Valve core is sleeve structure, valve core is arranged in airflow passage and can slide between first position and second position along the axial direction of airflow passage, and the side of valve core has communication port, communication port is connected with air inlet and air outlet when valve core is located in first position, and communication port is cut off with air inlet and air outlet when valve core is located in second position.The delay valve of the utility model can avoid air control reversing valve to be stuck.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic stations, and in particular to a delay valve. Background Technology

[0002] A hydraulic power unit is a hydraulic device that supplies oil according to the required flow direction, pressure and flow rate, and is usually used in conjunction with machine tools that require hydraulically driven actuators.

[0003] See Figure 1 This is a schematic diagram of a hydraulic station provided in the prior art. As shown in the figure, the hydraulic station includes: a linked cylinder 1' and an oil cylinder 2'; wherein, the cylinder end caps on both sides of cylinder 1' are respectively provided with a first reversing trigger device 3' and a second reversing trigger device 4', and cylinder 1' is connected to a pneumatically controlled reversing valve structure 5', with the air source connected to the air intake channels of the first reversing trigger device 3', the second reversing trigger device 4', and the pneumatically controlled reversing valve structure 5'; the working port A' of the pneumatically controlled reversing valve structure 5' is connected to one side of cylinder 1', and the working port B' of the pneumatically controlled reversing valve structure 5' is connected to the other side of cylinder 1'. The first reversing trigger device 3' is connected to the pneumatic reversing valve structure 5' to control the pneumatic reversing valve structure 5' to activate its A' working port, so that the A' working port of the pneumatic reversing valve structure 5' is connected to the P' air inlet channel of the pneumatic reversing valve structure 5'; the second reversing trigger device 4' is connected to the pneumatic reversing valve structure 5' to control the pneumatic reversing valve structure 5' to activate its B' working port, so that the B' working port of the pneumatic reversing valve structure 5' is connected to the P' air inlet channel of the pneumatic reversing valve structure 5'.

[0004] The working process of the hydraulic station described above is as follows: When the pneumatic piston is located on the left side of cylinder 1', it triggers the opening of the first reversing trigger device 3', pushing the pneumatic reversing valve structure 5' to reverse. Compressed air enters cylinder 1' from working port A', specifically into the space to the left of the pneumatic piston, thus pushing the pneumatic piston to the right (the first reversing trigger device 3' resets and closes), causing the oil piston in cylinder 2' to move to the right. When the pneumatic piston moves to the right side of cylinder 1', it triggers the opening of the second reversing trigger device 4', pushing the pneumatic reversing valve structure 5' to reverse. Compressed air enters cylinder 1' from port B', specifically into the space to the right of the pneumatic piston, thus pushing the pneumatic piston to the left (the second reversing trigger device 4' is reset and cut off), which in turn drives the piston in cylinder 2' to the left, causing hydraulic oil to flow in and out. Cylinder 1' reciprocates to generate hydraulic output. When the set pressure is reached, cylinder 1' stops moving to maintain a constant pressure. Cylinder 1' remains in a pressurized state and stops moving, thus no longer consuming compressed air. Compared to traditional hydraulic stations, this reduces energy consumption and heat generation, achieving energy saving.

[0005] As is well known in the art, to avoid simultaneous exhaust from both cylinder chambers, the pneumatic directional valve structure 5' has an in-first-out characteristic, meaning that the connection port corresponding to the intake port connects first, while the connection port corresponding to the exhaust port connects with a delay. When the pneumatic directional valve core is pushed to the right, i.e., during the process of A' working port switching from intake to exhaust and B' working port switching from exhaust to intake, when the intake of A' working port is closed but the exhaust has not yet opened, the exhaust of B' working port closes. When the intake just opens, i.e., when B' working port just starts to take in air, and at the same time both intake and exhaust of A' working port are closed, due to the higher pressure in the chamber connected to A' working port, the chamber connected to B' working port takes in air from B' working port, causing pressure in both cylinders. The pilot valve corresponding to the chamber connected to B' working port resets and closes, or the air source pressure decreases, etc., causing the air pressure pushing the pneumatic directional valve core to move to the right to decrease, resulting in the pneumatic directional valve jamming. If the directional valve gets stuck, the cylinder piston will stop moving, causing it to stop outputting hydraulic pressure. This results in the tooling losing pressure, leading to problems such as the workpiece not being clamped tightly or the tool colliding. Utility Model Content

[0006] This invention provides a delay valve that can prevent pneumatically controlled directional valves from jamming.

[0007] This utility model provides a delay valve, including a sleeve, a plunger, and a valve core. The sleeve has a first sleeve section coaxially arranged, and an air inlet is provided on the inner side wall of the first sleeve section. The air inlet connects to the working port of a reversing valve structure used to switch the intake and exhaust of the two cylinder chambers of a cylinder. The plunger has a first column section and a second column section coaxially arranged. The first column section is disposed within the first sleeve section, and an annular airflow channel is formed between the outer peripheral wall of the first column section and the inner peripheral wall of the first sleeve section. An air outlet is provided on the outer side wall of the first column section, and the air outlet connects to the outside. The second column section blocks one end of the first sleeve section. The valve core has a sleeve-shaped structure, and the valve core is disposed within the airflow channel and can slide between a first position and a second position along the axial direction of the airflow channel. The side of the valve core has a connecting port, which connects to the air inlet and the air outlet when the valve core is in the first position, and disconnects from the air inlet and the air outlet when the valve core is in the second position.

[0008] In some embodiments, the inner peripheral wall of the first segment has a protrusion located on one side of the air inlet. A valve core is located at the protrusion, and a first sealing ring and a second sealing ring are provided on the outer peripheral wall of the valve core. The first and second sealing rings are respectively located on both sides of the communication port. When the valve core is in the first position, the first sealing ring is located outside the protrusion, and the second sealing ring is located inside the protrusion, sealing the gap between the outer peripheral wall of the valve core and the inner peripheral wall of the protrusion. When the valve core is in the second position, the first sealing ring is located inside the protrusion, sealing the gap between the outer peripheral wall of the valve core and the inner peripheral wall of the protrusion, and the second sealing ring is located outside the protrusion. A third sealing ring and a fourth sealing ring are provided on the outer peripheral wall of the first segment, respectively located on both sides of the air outlet. Both the third and fourth sealing rings seal the gap between the outer peripheral wall of the first segment and the inner peripheral wall of the valve core.

[0009] In some embodiments, the outer peripheral wall of the valve core has a recess, and a communication port is provided in the recess.

[0010] In some embodiments, the outer peripheral wall of the valve core is provided with a first groove and a second groove, and a first sealing ring and a second sealing ring are respectively embedded in the first groove and the second groove. The outer peripheral wall of the first column segment is provided with a third groove and a fourth groove, and a third sealing ring and a fourth sealing ring are respectively embedded in the third groove and the fourth groove.

[0011] In some embodiments, the sleeve body further includes a second sleeve section coaxially arranged with the first sleeve section. A second column section is disposed within the second sleeve section, and the outer peripheral wall of the second column section is sealed to the inner peripheral wall of the second sleeve section.

[0012] In some embodiments, the inner diameter of the first segment is smaller than the inner diameter of the second segment. The outer diameter of the first shaft segment is smaller than the outer diameter of the second shaft segment.

[0013] In some embodiments, an inner sealing ring is provided on the outer peripheral wall of the second column segment, and the inner sealing ring is in sealing contact with the inner peripheral wall of the second sleeve segment.

[0014] In some embodiments, a fixing groove is provided on the outer peripheral wall of the second column segment, and an inner sealing ring is embedded in the fixing groove.

[0015] In some embodiments, an outer sealing ring is provided on the outer peripheral wall of the sleeve.

[0016] In some embodiments, the outer peripheral wall of the sleeve has a mounting groove, and an outer sealing ring is embedded in the mounting groove.

[0017] A delay valve according to an embodiment of the present invention includes a sleeve, a plunger, and a valve core. The sleeve has a first sleeve section coaxially arranged, with an air inlet on the inner wall of the first sleeve section. The air inlet connects to the working port of a reversing valve structure used to switch the intake and exhaust of two cylinder chambers. The plunger has a first column section and a second column section coaxially arranged. The first column section is disposed within the first sleeve section, and an annular airflow channel is formed between the outer peripheral wall of the first column section and the inner peripheral wall of the first sleeve section. An air outlet is provided on the outer peripheral wall of the first column section, connecting to the outside. The second column section blocks one end of the first sleeve section. The valve core has a sleeve-like structure, disposed within the airflow channel and slidable along the axial direction of the airflow channel between a first position and a second position. The side of the valve core has a connecting port, which connects to the air inlet and outlet when the valve core is in the first position, and disconnects from the air inlet and outlet when the valve core is in the second position. The delay valve of this invention disperses the air intake at one working port of the pneumatically controlled directional valve used for switching the intake and exhaust of the two cylinder chambers to the outside, so that the gas pressure in the cylinder chamber connected to the first working port is less than the gas pressure in the cylinder chamber connected to the other working port, thereby preventing the pneumatically controlled directional valve from jamming. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a working principle diagram of a hydraulic station provided in the prior art; Figure 2 This is a schematic diagram of the working principle of the hydraulic station provided in this embodiment of the present invention when air is introduced at the second working port B and air is not exhausted at the first working port A; Figure 3 This is a schematic diagram of the second commutation triggering structure provided in the embodiment of this utility model; Figure 4 This is a schematic diagram of the first commutation trigger structure provided in the embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the delay valve inside the cylinder end plate provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the structure of the delay valve provided in the embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the delay valve provided in the embodiment of this utility model; Figure 8 This is a schematic diagram of the working principle of the hydraulic station provided in this embodiment of the present invention when it intakes air at the second working port B and exhausts air at the first working port A; Figure 9 This is a schematic diagram of the working principle of the hydraulic station provided in this embodiment of the present invention when it intakes air at the first working port A and exhausts air at the second working port B. Figure 10 This is a schematic diagram of the first cross-section of the cylinder provided in the embodiment of this utility model; Figure 11 This is a schematic diagram of the second cross-section of the cylinder provided in the embodiment of this utility model; Figure 12 This is a structural schematic diagram of the third cross-section of the cylinder provided in the embodiment of this utility model; Figure 13 This is a schematic diagram of the reversing valve structure provided in the embodiments of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] See Figure 5-7 An embodiment of this utility model provides a delay valve, including a sleeve 507, a plunger 508, and a valve core 502.

[0022] The sleeve 507 has a first sleeve section 5071. An air inlet 5011 is provided on the inner wall of the first sleeve section 5071. The air inlet 5011 is connected to the working port of the reversing valve structure used to switch the air intake and exhaust of the two cylinder chambers of the cylinder. The air inlet 5011 can be located at one end of the first sleeve section 5071 near the second sleeve section 5072.

[0023] The sleeve 507 also has a second sleeve 5072 coaxially arranged with the first sleeve 5071. The inner diameter of the second sleeve 5072 can be larger than the inner diameter of the first sleeve 5071, and the outer diameter of the second sleeve 5072 can be larger than the outer diameter of the first sleeve 5071.

[0024] The sleeve 507 may further have a third sleeve coaxially arranged with the first sleeve segment 5071 and the second sleeve segment 5072, the third sleeve segment being located on the side of the second sleeve segment 5072 opposite to the first sleeve segment 5071. The inner diameter of the third sleeve segment may be larger than the inner diameter of the second sleeve segment 5072, and the outer diameter of the third sleeve segment may be larger than the outer diameter of the second sleeve segment 5072.

[0025] The plunger 508 may have a first plunger section 5081 and a second plunger section 5082 arranged coaxially. The outer diameter of the first plunger section 5081 may be smaller than the outer diameter of the second plunger section 5082.

[0026] The first column segment 5081 is disposed within the first sleeve segment 5071. An annular airflow channel 501 is formed between the outer peripheral wall of the first column segment 5081 and the inner peripheral wall of the first sleeve segment 5071. An air outlet is provided on the outer peripheral wall of the first column segment 5081, connecting to the outside. The outer diameter of the first column segment 5081 can be smaller than the inner diameter of the first sleeve segment 5071. The air outlet can be located at the middle position of the first column segment 5081.

[0027] The second column segment 5082 seals one end of the first sleeve segment 5071. The second column segment 5082 can be disposed within the second sleeve segment 5072, with a sealed connection between the outer peripheral wall of the second column segment 5082 and the inner peripheral wall of the second sleeve segment 5072. An inner sealing ring 512 can be provided on the outer peripheral wall of the second column segment 5082, making sealing contact with the inner peripheral wall of the second sleeve segment 5072. A fixing groove can be provided on the outer peripheral wall of the second column segment 5082, with the inner sealing ring 512 embedded within the fixing groove. The other end of the first sleeve segment 5071 can be either open or sealed.

[0028] The valve core 502 has a sleeve-like structure. It is disposed within the airflow channel 501 and can slide between a first position and a second position along the axial direction of the airflow channel 501. The side of the valve core 502 has a connecting port 5021. When the valve core 502 is in the first position, the connecting port 5021 communicates with the air inlet 5011 and the air outlet; when the valve core 502 is in the second position, the communication with the air inlet 5011 and the air outlet is cut off. The outer peripheral wall of the valve core 502 may have a recess 5022, within which the connecting port 5021 is located. The inner peripheral wall of the valve core 502 can transition to both end faces via conical surfaces. The outer peripheral wall of the valve core 502 can transition to both end faces via arc-shaped surfaces.

[0029] Optionally, the inner peripheral wall of the first segment 5071 has a protrusion 5013, which is located on one side of the air inlet 5011. A valve core 502 is located at the protrusion 5013. A first sealing ring 503 and a second sealing ring 504 are provided on the outer peripheral wall of the valve core 502. The first sealing ring 503 and the second sealing ring 504 are respectively located on both sides of the connecting port 5021. When the valve core 502 is in the first position, the first sealing ring 503 is located outside the protrusion 5013, and the second sealing ring 504 is located inside the protrusion 5013, sealing the gap between the outer peripheral wall of the valve core 502 and the inner peripheral wall of the protrusion 5013. When the valve core 502 is in the second position, the first sealing ring 503 is located inside the protrusion 5013, sealing the gap between the outer peripheral wall of the valve core 502 and the inner peripheral wall of the protrusion 5013, and the second sealing ring 504 is located outside the protrusion 5013. The valve core 502 has a first groove and a second groove on its outer peripheral wall, and a first sealing ring 503 and a second sealing ring 504 are respectively embedded in the first groove and the second groove. The first column segment 5081 has a third sealing ring 505 and a fourth sealing ring 506 on its outer peripheral wall, which are respectively located on both sides of the air outlet. Both the third sealing ring 505 and the fourth sealing ring 506 seal the gap between the outer peripheral wall of the first column segment 5081 and the inner peripheral wall of the valve core 502. The first column segment 5081 also has a third groove and a fourth groove on its outer peripheral wall, and the third groove and the fourth groove are respectively embedded in the third groove and the fourth groove.

[0030] Under the above conditions, when the valve core 502 is in the first position, the air inlet 5011 communicates with the connecting port 5021 through the gap between the outer peripheral wall of the valve core 502 and the inner peripheral wall of the first sleeve 5071, and the connecting port 5021 communicates with the air outlet through the gap between the inner peripheral wall of the valve core 502 and the outer peripheral wall of the first column section 5081. When the valve core 502 is in the second position, the air inlet 5011 and the connecting port 5021 are not connected, and the connecting port 5021 is still connected with the air outlet through the gap between the inner peripheral wall of the valve core 502 and the outer peripheral wall of the first column section 5081.

[0031] An outer sealing ring may be provided on the outer peripheral wall of the sleeve 507. The outer sealing ring may include a first outer sealing ring 509, a second outer sealing ring 510 and a third outer sealing ring 511. The first outer sealing ring 509 and the second outer sealing ring 510 are respectively provided on the outer peripheral wall of the first sleeve 507, and the third outer sealing ring 511 is provided on the connecting wall between the third sleeve and the second sleeve 507.

[0032] The outer peripheral wall of the sleeve 507 may have an installation groove, and an outer sealing ring is embedded in the installation groove. The outer peripheral wall of the sleeve 507 may have an installation groove including a first installation groove, a second installation groove and a third installation groove, and a first outer sealing ring 509, a second outer sealing ring 510 and a third outer sealing ring 511 are respectively embedded in the first installation groove, the second installation groove and the third installation groove.

[0033] See Figure 1-13 An embodiment of this utility model provides a delay valve, including a cylinder 1, a reversing trigger structure that can send a signal that the cylinder piston 102 of the cylinder 1 has moved to the position, a reversing valve structure 4 that switches the intake and exhaust of the two cylinder chambers of the cylinder 1 according to the signal of the reversing trigger structure, and a delay valve 5.

[0034] Cylinder 1 has a cylinder body 101, a cylinder piston 102, a first cylinder end plate 103, and a second cylinder end plate 104. The axis of the cylinder body 101 extends in the left-right direction. The cylinder piston 102 can slide left and right along the inner wall of the cylinder body 101 and form an air seal with the inner wall of the cylinder body 101. The first cylinder end plate 103 and the second cylinder end plate 104 are respectively provided at the left and right ends of the cylinder body 101 to seal the cylinder body 101. Under the above conditions, the left and right sides of the cylinder piston 102 are two cylinder chambers. When air enters the cylinder chamber on the left side of the cylinder piston 102, air exits the cylinder chamber on the right side, and when air enters the cylinder chamber on the right side, air exits the cylinder chamber on the left side, so that the cylinder piston 102 moves back and forth between the left and right ends under the action of air pressure. The cylinder piston 102 of cylinder 1 is connected to the oil cylinder piston through a linkage rod. The linkage rod is slidably installed in the cylinder end plate 103 located near the oil cylinder in cylinder 1, so that the cylinder piston 102 and the oil cylinder piston slide synchronously.

[0035] The first cylinder end plate 103 is provided with a first air passage 1031 that communicates with the cylinder cavity on the right side of the cylinder piston 102, and the second cylinder end plate 104 is provided with a second air passage 1041 that communicates with the cylinder cavity on the left side of the cylinder piston 102. The first air passage 1031 and the second air passage 1041 are respectively connected to the two working ports of the reversing valve structure 4.

[0036] There are two reversing trigger structures, namely the first reversing trigger structure 2 and the second reversing trigger structure 3. The first reversing trigger structure 2 and the second reversing trigger structure 3 are respectively set at the left end and the right end of the cylinder 1, so as to obtain whether the cylinder piston 102 has moved to the left and right ends respectively, and issue the corresponding move-to-end signal when the cylinder piston 102 moves to the left and right ends.

[0037] When the second reversing trigger structure 3 sends a signal that the cylinder piston 102 has moved to the position, it connects the cylinder cavity on the right side of the cylinder piston to the outside. When it stops sending the signal that the cylinder piston 102 has moved to the position, it disconnects the cylinder cavity on the right side of the cylinder piston from the outside.

[0038] The second reversing trigger structure 3 includes a first gas passage 302 disposed within the second cylinder end plate 104, which connects the cylinder cavity on the right side of the cylinder piston 102 to the outside. The second reversing trigger structure 3 also includes a first actuating shaft 301, one end of which is elastically mounted on the first gas passage 302, and the other end is disposed within the cylinder cavity on the right side of the cylinder piston 102. When the first actuating shaft 301 is not actuated by the cylinder piston 102, it disconnects the first gas passage 302; after being actuated by the cylinder piston 102, it reconnects the first gas passage 302. An exhaust muffler is provided at the outlet end of the first gas passage 302.

[0039] The inner peripheral wall of the first gas passage 302 has a first flow section 3021 and a second flow section 3022. The first flow section 3021 is located on the side of the second flow section 3022 closer to the cylinder 1. The inner diameter of the first flow section 3021 is smaller than the inner diameter of the second flow section 3022. The transition surface between the first flow section 3021 and the second flow section 3022 has a first contact sealing structure. The first jacking shaft 301 of the second reversing trigger structure 3 has a first shaft section 3011 and a second shaft section 3012. The outer diameter of the first shaft section 3011 and the outer diameter of the second shaft section 3012 are respectively clearance-fitted with the inner diameters of the first flow section 3021 and the second flow section 3022. The transition surface between the first shaft section 3011 and the second shaft section 3012 has a second contact sealing structure. The transition surface between the first flow section 3021 and the second flow section 3022 includes an arc-shaped surface, which constitutes the first contact sealing structure. The transition surface between the first shaft segment 3011 and the second shaft segment 3012 includes a tapered surface that gradually contracts into the cylinder 1, and the tapered surface constitutes a second contact sealing structure.

[0040] Each of the first push shafts 301 has a third shaft section 3013. The third shaft section 3013 is located on the side of the second shaft section 3012 near the outside of the cylinder 1. The outer diameter of the third shaft section 3013 is smaller than the outer diameter of the second shaft section 3012. A spring 303 is sleeved on the outside of the third shaft section 3013. One end of the spring 303 abuts against the transition surface between the third shaft section 3013 and the second shaft section 3012, and the other end abuts against the inner wall of the first gas passage 302.

[0041] When the first reversing trigger structure 2 sends a signal that the cylinder piston has moved to the position, it connects the air source to the control port Z of the reversing valve structure 4. When it stops sending the signal that the cylinder piston has moved to the position, it disconnects the air source from the control port Z.

[0042] The first reversing trigger structure 2 includes a second gas passage 202 disposed within the first cylinder end plate 103, the second gas passage 202 connecting the corresponding gas source and the control port Z. The first reversing trigger structure 2 also includes a second actuating shaft 201, one end of which is elastically mounted within the second gas passage 202, and the other end is disposed within the cylinder cavity to the left of the cylinder piston 102. When the second actuating shaft 201 is not actuated by the cylinder piston 102, it disconnects the second gas passage 202; after being actuated by the cylinder piston 102, it reconnects the second gas passage 202.

[0043] The inner peripheral wall of the second gas passage 202 has a third flow section 2021 and a fourth flow section 2022. The third flow section 2021 is located on the side of the fourth flow section 2022 closer to the cylinder 1. The inner diameter of the third flow section 2021 is smaller than the inner diameter of the fourth flow section 2022. The transition surface between the third flow section 2021 and the fourth flow section 2022 has a third contact sealing structure. The second jacking shaft 201 of the first reversing trigger structure 2 has a fourth shaft section 2011 and a fifth shaft section 2012. The outer diameters of the fourth shaft section 2011 and the fifth shaft section 2012 are respectively clearance-fitted with the inner diameters of the third flow section 2021 and the fourth flow section 2022. The transition surface between the fourth shaft section 2011 and the fifth shaft section 2012 has a fourth contact sealing structure. The transition surface between the third flow section 2021 and the fourth flow section 2022 includes an arc-shaped surface, which constitutes the third contact sealing structure. The transition surface between the fourth shaft segment 2011 and the fifth shaft segment 2012 includes a tapered surface that gradually tapers into the cylinder 1, and the tapered surface constitutes the fourth contact sealing structure.

[0044] The second jacking shaft 201 has a sixth shaft section 2013. The sixth shaft section 2013 is located on the side of the fifth shaft section 2012 near the outside of the cylinder 1. The outer diameter of the sixth shaft section 2013 is smaller than the outer diameter of the fifth shaft section 2012. A spring 203 is sleeved on the outside of the sixth shaft section 2013. One end of the spring 203 abuts against the transition surface between the sixth shaft section 2013 and the fifth shaft section 2012, and the other end abuts against the inner wall of the second gas passage 202.

[0045] The reversing valve structure 4 is connected to the first reversing trigger structure 2 and the second reversing trigger structure 3 respectively, so as to switch the cylinder chamber on the left side of cylinder 1 to intake air and the cylinder chamber on the right side of cylinder 1 to exhaust air according to the movement signal issued by the first reversing trigger structure 2, and switch the cylinder chamber on the right side of cylinder 1 to intake air and the cylinder chamber on the left side of cylinder 1 to exhaust air according to the movement signal issued by the second reversing trigger structure 3.

[0046] The cylinder 1 is provided with a mounting plate 6. The mounting plate 6 is provided with a reversing valve structure 4, a first air passage 601 and a second air passage 602. The first air passage 601 and the second air passage 602 are respectively connected to the two working ports of the reversing valve structure 4, and are respectively connected to the first air passage 1031 and the second air passage 1041. The reversing valve structure 4 includes a reversing chamber 401 disposed in the mounting plate 6. The side of the reversing chamber 401 is provided with an air inlet 402, two exhaust ports (403, 404) and two working ports. One end of the reversing chamber 401 is provided with a control port 405 and the other end is provided with a spring 406. The air inlet 402 is connected to the air source. The two working ports are connected to the first air passage 601 and the second air passage 602 respectively. The two exhaust ports (403, 404) are both connected to the outside. The control port 405 is connected to the air source when the first reversing trigger structure 2 sends a signal that the cylinder piston has moved to the position. The control port 405 is connected to the outside when the second reversing trigger structure 3 sends a signal that the cylinder piston has moved to the position. The reversing valve structure 4 also includes a reversing valve core 407 disposed in the reversing chamber 401. After the spring 406 is compressed by the intake pressure of the control port 405, the reversing valve core 407 connects the intake port 402 with a working port and connects an exhaust port with another working port. After the spring 406 is reset, the intake port 402 connects with the other working port and the other exhaust port connects with the first working port.

[0047] The air inlet 402 is connected to the air inlet end of the second gas passage 202, and the control port 405 is connected to the air outlet end of the second gas passage 202. The mounting plate 6 has a first connecting channel 606 and a second connecting channel 607. One end of the first connecting channel 606 and the second connecting channel 607 are respectively connected to the air inlet 402 and the control port 405 of the reversing valve structure 4, and the other end is disposed on the surface of the mounting plate 6. The first cylinder end plate 103 has a third connecting channel 1032 and a fourth connecting channel 1033. One end of the third connecting channel 1032 and the fourth connecting channel 1033 are respectively connected to the air inlet end and the air outlet end of the second gas passage, and the other end is disposed on the surface of the cylinder end plate and respectively connects to the other end of the first connecting channel 606 and the second connecting channel 607.

[0048] The control port 405 communicates with the side of the first gas passage, and the communication point is located on the first flow section. A fifth connecting channel 605 is provided within the mounting plate 6. One end of the fifth connecting channel 605 communicates with the control port 405, and the other end is located on the surface of the mounting plate 6. A sixth connecting channel 1042 is provided within the second cylinder end plate 104. One end of the sixth connecting channel 1042 communicates with the first gas passage, and the other end is located on the surface of the cylinder end plate and connects with the other end of the fifth connecting channel 605.

[0049] The inlet 5011 of the delay valve 5 is connected to the second working port B, and the outlet 5012 is connected to the outside. Under the above conditions, the valve core 502 moves from the first position to the second position under the inlet pressure of the second working port B.

[0050] The other end of the first segment 5071 in the delay valve 5 can communicate with the cylinder cavity on the right side of the cylinder piston 102. Under the above conditions, when the cylinder piston moves to the right, the valve core 502 moves from the second position to the first position under the gas pressure in the cylinder cavity.

[0051] The delay valve 5 can be disposed within the second cylinder end plate 104. Optionally, the outer wall of the cylinder end plate 103 is provided with a mounting groove 1031, and the bottom wall of the mounting groove 1031 is provided with an air supply port 5014. The sleeve 507 is coaxially encapsulated within the mounting groove 1031, with one end of the sleeve 507 near the cylinder 1 fitting against the bottom wall of the mounting groove 1031. The end of the plunger 508 near the cylinder 1 can be spaced a certain distance from the bottom wall of the mounting groove 1031. Optionally, the first sleeve section 5071 and the second sleeve section 5072 are disposed within the mounting groove 1031, and the third sleeve section is disposed outside the mounting groove 1031. The first outer sealing ring 509 and the second outer sealing ring 510 are in sealing contact with the inner peripheral wall of the mounting groove, and the third outer sealing ring 511 is in sealing contact with the outer side wall of the cylinder end plate 103.

[0052] During the operation of the hydraulic station of this utility model, when the first reversing trigger structure 2 is just actuated, it pushes the reversing valve core to the right to close the air intake at the first working port A, before the exhaust is opened. At the same time, the exhaust at the second working port B is closed, and as soon as the air intake opens, the air intake at the second working port B is discharged through the airflow channel 501 of the delay valve 5. At this point, the schematic diagram of the hydraulic station is as follows: Figure 1 As shown, the internal schematic diagram of the delay valve 5 is as follows: Figure 5 As shown. Because there is still pressure in the cylinder cavity on the right side of the cylinder piston 102, the cylinder piston 102 will continuously push the first reversing trigger structure 2, so that the first reversing trigger structure 2 continuously exhausts gas through the first gas channel and continuously pushes the reversing valve core to move to the right. After pushing the reversing valve core to the right, the second working port B takes in air, the first working port A exhausts air, and the valve core 502 is pushed to the left limit position under the air intake pressure of the second working port B. At this time, the schematic diagram of the hydraulic station is as follows. Figure 8 As shown, the internal schematic diagram of the delay valve 5 is as follows: Figure 6 As shown in the diagram. When the cylinder piston 102 moves to the right and pushes the second reversing trigger structure 3, the second reversing trigger structure 3 exhausts gas through the first gas channel. The reversing valve core moves to the left and resets under the action of the spring. Air enters through the first working port A and exhausts gas through the second working port B. The valve core 502 is pushed to the right limit position by the gas pressure in the cylinder cavity on the right side of the cylinder piston 102. At this time, the schematic diagram of the hydraulic station is as follows. Figure 9 As shown, the internal schematic diagram of the delay valve 5 is as follows: Figure 5 As shown.

[0053] In summary, by setting a delay valve 5, this utility model achieves the following: when one working port of the pneumatic control directional valve used for switching the intake and exhaust of the two cylinder chambers is just receiving air while the other working port is closed for both intake and exhaust, the air intake at the first working port is dispersed to the outside, so that the gas pressure in the cylinder chamber connected to the first working port is less than the gas pressure in the cylinder chamber connected to the other working port, thereby preventing the pneumatic control directional valve structure 4 from jamming.

[0054] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A delay valve, characterized in that, include: The sleeve has a first sleeve section arranged coaxially. An air inlet is provided on the inner side wall of the first sleeve section. The air inlet is connected to the working port of a reversing valve structure used to switch the air intake and exhaust of the two cylinder chambers of the cylinder. The plunger has a first plunger section and a second plunger section arranged coaxially; the first plunger section is disposed inside the first sleeve section, and an annular airflow channel is formed between the outer peripheral wall of the first plunger section and the inner peripheral wall of the first sleeve section; an air outlet is provided on the outer peripheral wall of the first plunger section, and the air outlet is connected to the outside; the second plunger section blocks one end of the first sleeve section. The valve core has a sleeve-like structure. The valve core is disposed in the annular airflow channel and can slide between a first position and a second position along the axial direction of the annular airflow channel. The side of the valve core has a communication port. The communication port is connected to the air inlet and the air outlet when the valve core is in the first position, and is disconnected from the air inlet and the air outlet when the valve core is in the second position.

2. The delay valve as described in claim 1, characterized in that, The inner peripheral wall of the first segment has a protrusion, which is located on one side of the air inlet; The valve core is disposed at the protrusion. A first sealing ring and a second sealing ring are provided on the outer peripheral wall of the valve core. The first sealing ring and the second sealing ring are respectively disposed on both sides of the communication port. When the valve core is in the first position, the first sealing ring is disposed outside the protrusion, and the second sealing ring is disposed inside the protrusion, sealing the gap between the outer peripheral wall of the valve core and the inner peripheral wall of the protrusion. When the valve core is in the second position, the first sealing ring is disposed inside the protrusion, sealing the gap between the outer peripheral wall of the valve core and the inner peripheral wall of the protrusion, and the second sealing ring is disposed outside the protrusion. The outer peripheral wall of the first column segment is provided with a third sealing ring and a fourth sealing ring. The third sealing ring and the fourth sealing ring are respectively located on both sides of the air outlet. The third sealing ring and the fourth sealing ring both seal the gap between the outer peripheral wall of the first column segment and the inner peripheral wall of the valve core.

3. The delay valve as described in claim 2, characterized in that, The outer peripheral wall of the valve core has a recessed portion, and the communication port is provided in the recessed portion.

4. The delay valve as described in claim 2, characterized in that, The outer peripheral wall of the valve core is provided with a first groove and a second groove, and the first sealing ring and the second sealing ring are respectively embedded in the first groove and the second groove. The outer peripheral wall of the first column segment is provided with a third groove and a fourth groove, and the third sealing ring and the fourth sealing ring are respectively embedded in the third groove and the fourth groove.

5. The delay valve as described in claim 1, characterized in that, The sleeve also has a second sleeve segment coaxially arranged with the first sleeve segment; The second column segment is disposed within the second sleeve segment, and the outer peripheral wall of the second column segment is sealed to the inner peripheral wall of the second sleeve segment.

6. The delay valve as described in claim 5, characterized in that, The inner diameter of the first segment is smaller than the inner diameter of the second segment; The outer diameter of the first segment is smaller than the outer diameter of the second segment.

7. The delay valve as described in claim 5, characterized in that, An inner sealing ring is provided on the outer peripheral wall of the second column segment, and the inner sealing ring is in sealing contact with the inner peripheral wall of the second sleeve segment.

8. The delay valve as described in claim 7, characterized in that, The second column segment has a fixing groove on its outer peripheral wall, and the inner sealing ring is embedded in the fixing groove.

9. The delay valve as claimed in claim 1, characterized in that, An outer sealing ring is provided on the outer peripheral wall of the sleeve.

10. The delay valve as claimed in claim 9, characterized in that, The outer peripheral wall of the sleeve has an installation groove, and the outer sealing ring is embedded in the installation groove.

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