Pneumatic control valve structure of correlation photoelectric switch

Abstract

The utility model discloses a pneumatic control valve structure of a correlation photoelectric switch, which relates to the technical field of control valve structures and comprises a shell and a valve body arranged in the shell, a correlation photoelectric switch group is arranged on the shell, and a control switch group is arranged in the shell. According to the utility model, the through-beam photoelectric switches are adopted to carry out on-off control on the electromagnetic valves, the through-beam photoelectric switches are adopted to cooperatively control the double electromagnetic valves so as to realize accurate metering of fluid, and the large valve and the small valve respectively adopt a grading response mechanism; the electromagnetic valve drives the large valve to achieve rapid on-off to complete raw material main body flow filling, similarly, the small valve conducts micro-flow compensation, signals are fed back to the correlation switch in real time based on actual weighing on the scale to achieve dynamic on-off cooperation, and therefore the flow of raw materials flowing through the valve body is controlled within a set threshold value. And finally, milliliter-level precision control of the raw material containing amount is realized.

Description

Technical Field

[0001] This utility model relates to the field of control valve structure technology, specifically a pneumatic control valve structure of a photoelectric switch, which eliminates the need for wired control of valve opening and closing. Background Technology

[0002] Traditional valves are generally classified into three categories according to their driving method: manual, pneumatic, and electric. Manual valves rely on direct human operation, while pneumatic and electric valves are used in automated scenarios. Both receive signals from the control system to precisely control the valve opening and closing, thereby achieving precise regulation of material flow to meet the strict ingredient ratio requirements in the production process.

[0003] However, traditional automated valves rely on wired connections to receive control signals, making it impossible to obtain real-time data on the remaining material demand from the weighing module on the wireless mobile batching cart, and thus dynamically control the valve opening and closing wirelessly. This leads to traditional batching systems generally using track-mounted single batching carts, resulting in problems such as high cost, low efficiency, large equipment size, and high maintenance difficulty.

[0004] The pneumatic control valve equipped with a photoelectric switch can support multiple AGV batching carts or hand-pushed batching carts to carry out batching operations at the same time. It can link the valve opening and closing in real time through wireless signals to accurately match the material requirements of each workstation, effectively solving the limitations of traditional equipment and providing an efficient solution for flexible production. Utility Model Content

[0005] This utility model discloses a pneumatic control valve structure for a through-beam photoelectric switch to solve the technical problem of wireless communication.

[0006] To solve the above-mentioned technical problems, the present invention proposes the following optimized technical solution:

[0007] A pneumatic control valve structure for a through-beam photoelectric switch includes a housing and a valve body disposed within the housing. The housing is provided with a through-beam photoelectric switch assembly and a control switch assembly within the housing. The through-beam photoelectric switch assembly includes a first through-beam photoelectric switch and a second through-beam photoelectric switch. The control switch assembly includes two solenoid valves. The first through-beam photoelectric switch and the second through-beam photoelectric switch are electrically connected to the two solenoid valves respectively. The two solenoid valves are used to control the opening and closing of the large valve and the small valve of the valve body respectively according to the signals from the first through-beam photoelectric switch and the second through-beam photoelectric switch.

[0008] Furthermore, the housing is also provided with an obstruction for a through-beam switch, the obstruction being used to cooperate with the through-beam switch to receive signals from the batching vehicle.

[0009] Further, the valve body comprises an outer shell, a large valve and a small valve arranged in the outer shell, the outer shell is provided with a discharge port, a feeding pipe, a first air inlet pipe and a second air inlet pipe, the small valve is provided with a fine channel;

[0010] When the first air inlet pipe is aerated, the large valve is away from the discharge port, and the feeding pipe is directly communicated with the discharge port;

[0011] When the second air inlet pipe is aerated, the small valve is close to the discharge port, and the feeding pipe is communicated with the discharge port through the fine channel.

[0012] Further, the inner part of the outer shell is provided with a narrow accommodation area and a wide accommodation area, the discharge port, the narrow accommodation area and the wide accommodation area are communicated in sequence, and the narrow accommodation area is provided with an air inlet area;

[0013] The large valve comprises a sleeve and a plunger, the sleeve is used for sleeving on the small valve, the plunger is partially arranged at the bottom end of the sleeve, and the plunger part is inserted into the discharge port; the top end of the sleeve is provided with a widened part, the sleeve and the plunger are arranged in the narrow accommodation area, the widened part is located in the wide accommodation area, and the first air inlet pipe is located below the widened part and communicates with the air inlet area;

[0014] When the first air inlet pipe is aerated, the sleeve drives the plunger to be away from the discharge port, so that the feeding pipe is directly communicated with the discharge port.

[0015] Further, the small valve comprises a middle shaft and a top shaft arranged in sequence from bottom to top, the middle shaft is arranged in the sleeve and partially protrudes upwardly from the widened part, the lower end of the middle shaft is provided with a flow channel groove and sleeved with a sealing ring, the sealing ring is arranged below the flow channel groove, and the top shaft is arranged in the wide accommodation area; the second air inlet pipe is connected with the wide accommodation area;

[0016] The bottom end of the sleeve is provided with an inverted funnel area which is narrow at the top and wide at the bottom, and the side wall of the sleeve is provided with a flow channel through hole; the fine channel is arranged on the plunger;

[0017] When the second air inlet pipe is aerated, the top shaft pushes the middle shaft into the inverted funnel area, so that the feeding pipe, the flow channel through hole, the flow channel groove, the fine channel and the discharge port are communicated in sequence.

[0018] Further, the large valve further comprises a first reset spring, the first reset spring is arranged in the wide accommodation area, and the first reset spring is located between the sleeve and the top shaft.

[0019] Further, the top end of the middle shaft is provided with a cover body, the small valve comprises a second reset spring, the second reset spring is sleeved on the middle shaft and located between the cover body and the widened portion.

[0020] Further, the fine channel is provided with a narrow lower part and a wide upper part.

[0021] Further, the pair of photoelectric switches further comprises a third pair of photoelectric switches, and the control switch further comprises a relay, the third pair of photoelectric switches are electrically connected with the relay.

[0022] Further, the pair of photoelectric switches further comprises a third pair of photoelectric switches, and the control switch further comprises a relay, the third pair of photoelectric switches are electrically connected with the relay.

[0023] Further, the first pair of photoelectric switches, the second pair of photoelectric switches and the third pair of photoelectric switches are infrared pairs of photoelectric switches or laser pairs of photoelectric switches.

[0024] The utility model discloses the following beneficial effects relative to the prior art:

[0025] The utility model discloses the pair of photoelectric switches control on-off of electromagnetic valve, thereby enabling two electromagnetic valves to control opening and closing of the big valve and the small valve of valve body quickly, and the big valve and the small valve of valve body can react in time, thereby controlling the flow through valve body, to fill a certain amount of raw materials accurately, and the pair of photoelectric switches realizes fluid accurate measurement through the cooperative control of double electromagnetic valves, wherein the big valve and the small valve adopt hierarchical response mechanism respectively: the big valve controls electromagnetic valve through the pair of photoelectric switches, and electromagnetic valve drives the big valve to realize quick on-off to complete raw material main flow filling, and the small valve carries out micro flow compensation, and the big valve and the small valve realize dynamic opening and closing cooperation through the actual weighing real-time feedback signal of scale to the pair of photoelectric switches, thereby controlling the raw material flow through valve body in the set threshold, and finally realizing milliliter level precision control of raw material filling. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure diagram of the utility model Figure 1 .

[0027] Figure 2 It is the structure diagram of the utility model Figure 2 .

[0028] Figure 3 It is the structure diagram of the shell inside the utility model.

[0029] Figure 4 It is the structure diagram of the valve body of the utility model.

[0030] Figure 5 is the bottom view of the valve body of the utility model.

[0031] Figure 6 is Figure 5 the A-A section view of the utility model.

[0032] Figure 7 is Figure 6 the A enlarged view of the utility model.

[0033] Figure 8 is Figure 5 the B-B section view of the utility model.

[0034] Figure 9 is Figure 8 the B enlarged view of the utility model.

[0035] Figure 10 is the structure schematic view of the shielding assembly of the utility model.

[0036] In the figure: 1, shell; 2, valve body; 3, first pair of light electric switch; 4, second pair of light electric switch; 5, electromagnetic valve; 6, obstacle; 7, large valve; 8, small valve; 9, discharge port; 10, feed pipe; 11, first air inlet pipe; 12, second air inlet pipe; 13, fine channel; 14, narrow containing area; 15, wide containing area; 16, air inlet area; 17, sleeve; 18, widening part; 19, first reset spring; 20, plunger; 21, middle shaft; 22, top shaft; 23, second reset spring; 24, third pair of light electric switch; 25, shielding assembly; 26, translation driving part; 27, shielding plate; 28, relay; 29, recess; 30, discharge pipe; 31, flow channel groove; 32, sealing ring; 33, inverted funnel area; 34, flow channel through hole; 35, cover body; 36, shell; 37, valve number two-dimensional code. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, obviously, the described embodiments are a part of the embodiments of the present application, not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the present application.

[0038] Referring to Figures 1-10The utility model relates to a kind of aerodynamic control valve structures of photoelectric switch, including shell 1 and the valve body 2 being arranged in the shell 1, the shell 1 is equipped with photoelectric switch group and shell 1 is equipped with control switch group in the shell 1, the photoelectric switch group includes first photoelectric switch 3 and second photoelectric switch 4, the control switch group includes two electromagnetic valves 5, the first photoelectric switch 3 and the second photoelectric switch 4 are electrically connected two electromagnetic valves 5 respectively, and two electromagnetic valves 5 are used to control the opening and closing of large valve 7 and small valve 8 of the valve body 2 according to the signal of the first photoelectric switch 3 and the second photoelectric switch 4 respectively.

[0039] In the above technical solution, large valve 7 is used for releasing the control structure of larger flow, and small valve 8 is used for releasing the control structure of smaller flow. When used, the first photoelectric switch 3 transmits a signal to one of the electromagnetic valves 5, and the electromagnetic valve 5 opens the large valve 7 of the valve body 2, so that the raw materials flow out from the valve body 2 at a large flow. When the flow reaches a certain amount, the second photoelectric switch 4 transmits a signal to the other electromagnetic valve 5, and the electromagnetic valve 5 opens the small valve 8 of the valve body 2, so that the raw materials flow out from the valve body 2 at a small flow. When the flow reaches a predetermined amount, the first photoelectric switch 3 and the second photoelectric switch 4 control the two electromagnetic valves 5 to be closed, so as to quickly control the work.

[0040] It should be noted that the first photoelectric switch 3 and the second photoelectric switch 4 are used in cooperation with the control system. The control system has the weight of the required raw materials, that is, the control system issues a weight of the required raw materials, and the barrel with the weighter moves to the lower side of the valve body 2. The first photoelectric switch 3 transmits a signal to one of the electromagnetic valves 5, and the electromagnetic valve 5 is opened, that is, the large valve 7 is opened. The raw materials flow into the barrel, and the weighter weighs the raw materials in the barrel in real time and transmits the weight data to the control system. When the weight approaches the weight of the required raw materials, the control system issues a command. The first photoelectric switch 3 transmits a signal to one of the electromagnetic valves 5, and the electromagnetic valve 5 is closed. The large valve 7 is closed. The second photoelectric switch 4 transmits a signal to the other electromagnetic valve 5 to control the small valve 8 to be opened. Until the weight of the raw materials in the barrel weighed by the weighter is equal to the weight of the required raw materials, the control system issues a command. The second photoelectric switch 4 transmits a signal to the other electromagnetic valve 5, and the electromagnetic valve 5 is closed. The small valve 8 is closed.

[0041] Take 20ml as an example, the control system sends a signal to one of the electromagnetic valves 5, and the electromagnetic valve 5 is opened, i.e. the large valve 7 is opened, and the raw material flows out at a large flow rate. When the weight of the raw material in the bucket reaches 15ml, the control system sends a signal to one of the electromagnetic valves 5, and the electromagnetic valve 5 is closed, and the large valve 7 is closed. The second pair of light barriers 4 sends a signal to the other electromagnetic valve 5, and the electromagnetic valve 5 is opened, and the small valve 8 is opened. When the weight of the raw material in the bucket reaches 20ml, the control system sends a signal to the other electromagnetic valve 5, and the electromagnetic valve 5 is closed, and the small valve 8 is closed. It can be understood that the signal transmission is fast and will not cause the two electromagnetic valves 5 to close in time.

[0042] In the embodiment, the housing is further provided with an obstacle 6 for the light barrier switch, which is used to cooperate with the light barrier switch to receive a signal of the batching car. Specifically, the light barrier switch is arranged on the batching car, and when the batching bucket moves below the valve body 2, the obstacle 6 blocks the middle of the light barrier switch, so that the light barrier switch triggers the batching car control system to control the operation of the pneumatic control valve of the wireless light barrier photoelectric switch.

[0043] In the embodiment, the valve body 2 comprises an outer shell 36 and a large valve 7 and a small valve 8 arranged in the outer shell 36. The outer shell 36 is provided with a discharge port 9, a feeding pipe 10, a first air inlet pipe 11 and a second air inlet pipe 12. The small valve 8 is provided with a fine channel 13. When the first air inlet pipe 11 is aerated, the large valve 7 is away from the discharge port 9, and the feeding pipe 10 is directly communicated with the discharge port 9, so that the raw material flows from the feeding pipe 10 to the discharge port 9 and flows out from the discharge port 9, and at this time, the flow rate of the discharge port 9 is the largest. When the second air inlet pipe 12 is aerated, the small valve 8 is close to the discharge port 9, and the feeding pipe 10 is communicated with the discharge port 9 through the fine channel 13, so that the raw material flows from the feeding pipe 10 to the fine channel 13 and flows out from the discharge port 9, and at this time, the flow rate of the discharge port 9 is the smallest.

[0044] It is additionally explained that the outer shell 36 is detachably connected in two parts, and the detachable connection of the two parts has multiple choices, so as to realize detachable connection, for example, threaded connection.

[0045] In the embodiment, the housing 36 is internally provided with a narrow accommodating area 14 and a wide accommodating area 15, the discharge port 9, the narrow accommodating area 14 and the wide accommodating area 15 are sequentially communicated, the narrow accommodating area 14 is provided with an air inlet area 16; the large valve 7 comprises a sleeve 17 and a plunger 20, the sleeve 17 is used for sleeving on the small valve 8, the plunger 20 is partially arranged at the bottom end of the sleeve 17, the plunger 20 is partially inserted into the discharge port 9, the top end of the sleeve 17 is provided with a widened portion 18, the sleeve 17 and the plunger 20 are arranged in the narrow accommodating area 14, the widened portion 18 is located in the wide accommodating area 15, the first air inlet pipe 11 is located below the widened portion 18 and communicates with the air inlet area 16; when air is introduced into the first air inlet pipe 11, the sleeve 17 drives the plunger 20 to move away from the discharge port 9, so that the feeding pipe 10 is directly communicated with the discharge port 9.

[0046] The working principle of opening the large valve 7 is as follows: the electromagnetic valve 5 makes the first air inlet pipe 11 in the communication state, at this time, gas enters the air inlet area 16 from the first air inlet pipe 11, because the air inlet area 16 is below the widened portion 18, therefore, the gas lifts up the sleeve 17, the sleeve 17 drives the plunger 20 to move upward together, the plunger 20 moves away from the discharge port 9, at this time, the plunger 20 no longer blocks the discharge port, and the raw materials in the feeding pipe 10 can directly flow out from the discharge port 9.

[0047] In the embodiment, the small valve 8 comprises a middle shaft 21 and a top shaft 22 arranged in sequence from bottom to top, the middle shaft 21 is arranged in the sleeve 17 and partially protrudes upwardly from the widened portion 18, the lower end of the middle shaft 21 is provided with a flow channel groove 31 and a sealing ring 32 sleeved thereon, the sealing ring 32 is arranged below the flow channel groove 31, and the top shaft 22 is arranged in the wide accommodating area 15; the second air inlet pipe 12 is connected with the wide accommodating area 15; the bottom end of the sleeve 17 is provided with an inverted funnel area 33 which is narrow at the top and wide at the bottom, the side wall of the sleeve 17 is provided with a flow channel through hole 34; the fine channel 13 is arranged on the plunger 20; when air is introduced into the second air inlet pipe 12, the top shaft 22 drives the middle shaft 21 to enter the inverted funnel area 33, so that the feeding pipe 10, the flow channel through hole 34, the flow channel groove 31, the fine channel 13 and the discharge port 9 are sequentially communicated.

[0048] The working principle of opening the small valve 8 is as follows: when the weight of the raw material in the barrel approaches the required weight, the large valve is closed, that is, the plunger 20 is now plugged into the discharge port 9, and the small valve 8 is opened: the electromagnetic valve 5 makes the second air inlet pipe 12 in a communication state, at this time, the gas enters the wide accommodation area 15 from the second air inlet pipe 12, the gas pushes the top shaft 22 downward to the middle shaft 21, the middle shaft 21 moves downward, and the lower end thereof moves to the inverted funnel area 33, at this time, the sealing ring 32 enters the inverted funnel area 33, that is, the sealing ring 32 is not in close contact with the inner wall of the sleeve 17, and the flow channel groove 31 is in communication with the flow channel through hole 34 and the inverted funnel area 33, at this time, the raw material of the feeding pipe 10 flows between the outer shell 36 and the sleeve 17, and then flows through the flow channel through hole 34, the flow channel groove 31, the inverted funnel area 33, and the fine channel 13 in turn, and then flows out from the discharge port 9.

[0049] In the embodiment, the large valve 7 further comprises a first reset spring 19, which is arranged in the wide accommodation area 15 and located between the sleeve 17 and the top shaft 22, and is used for resetting the sleeve 17. When the electromagnetic valve 5 makes the first air inlet pipe 11 in a disconnected state, the first air inlet pipe 11 cannot ventilate the air inlet area 16, and the first reset spring 19 rebounds to reset the sleeve 17 and the plunger 20, that is, the sleeve 17 and the plunger 20 move downward to plug the plunger 20 into the discharge port 9.

[0050] In the embodiment, the top end of the middle shaft 21 is provided with a cover 35, and the small valve 8 comprises a second reset spring 23, which is sleeved on the middle shaft 21 and located between the cover 35 and the widened part 18. When the electromagnetic valve 5 makes the second air inlet pipe 12 in a disconnected state, the second reset spring 23 rebounds to move the middle shaft 21 upward, and the middle shaft 21 pushes the top shaft 22 upward to complete the resetting of the middle shaft 21 and the top shaft 22. During the upward movement of the middle shaft 21, the sealing ring 32 moves upward from the inverted funnel area 33 to the sleeve 17, and the sealing ring 32 has a back suction effect on the material balls in the fine channel 13 to ensure the accuracy.

[0051] In the embodiment, the fine channel 13 has a structure of being narrow at the lower part and wide at the upper part, and the fine channel 13 with the structure of being wide at the upper part and narrow at the lower part can better limit the flow of the discharge port 9. Specifically, the fine channel 13 is divided into a narrow part at the lower part and a wide part at the upper part, and the diameter of the narrow part is smaller than that of the wide part.

[0052] In the embodiment, the pair of photoelectric switches further comprises a third pair of photoelectric switch 24, the control switch further comprises a relay 28, the third pair of photoelectric switch 24 is electrically connected with the relay 28; the utility model also includes shielding assembly 25, shielding assembly 25 includes translation driving part 26 and shielding plate 27, translation driving part 26 is set on the shell 1, shielding plate 27 connects the output shaft of translation driving part 26, the relay 28 electrically connected third pair of photoelectric switch and translation driving part 26.

[0053] In the above technical solution, when the weight of the raw material in the barrel is equal to the required weight, the control system issues a command, the first pair of photoelectric switch 3 and the second pair of photoelectric switch 4 control the two electromagnetic valves 5 to close at the same time, the third pair of photoelectric switch 24 controls the relay 28 to drive the translation driving part 26, so that the shielding plate 27 moves below the discharge port 9, and the shielding plate 27 prevents the raw material from dripping from the discharge port 9.

[0054] It should be noted that the translation driving part 26 is a small air cylinder.

[0055] It should be noted that the top surface of the shielding plate 27 is provided with a funnel-shaped groove 29, which is used to catch the raw material dripping from the discharge port 9. The shielding plate 27 is connected with a discharge pipe 30, which communicates with the groove 29, for discharging the raw material in the groove 29.

[0056] In the embodiment, the first pair of photoelectric switch 3, the second pair of photoelectric switch 4 and the third pair of photoelectric switch 24 are infrared pair photoelectric switch or laser pair photoelectric switch. Both infrared pair photoelectric switch and laser pair photoelectric switch have fast reaction force, which can ensure that the control command is quickly transmitted to the electromagnetic valve 5 or the relay 28, so as to ensure the efficient operation of the work and avoid delay work.

[0057] It should be noted that each valve body corresponds to a valve number two-dimensional code 37, and scanning the valve number two-dimensional code 37 can know the corresponding raw material in the valve body 2.

[0058] The working principle of the utility model is: the barrel with the weighter is moved to the below of valve body 2, the barrier 6 shields the receiving of the first pair of photoelectric switch 3 and transmits the signal to the control system, the control system has the weight of the required raw material, the control system gives the command to the third pair of photoelectric switch 24 and the first pair of photoelectric switch 3, the translation driving part 26 drives the shielding plate 27 to move away from the below of discharge port 9, the first pair of photoelectric switch 3 receives the signal and makes the electromagnetic valve 5 control the first air inlet pipe 11 to be in the communicating state, the gas of the first air inlet pipe 11 leads to the air inlet area 16, because the air inlet area 16 is located below the widened area, therefore the gas drives the sleeve 17 and plunger 20 to move upwards, the plunger 20 separates from the discharge port 9, the raw material of the feeding pipe 10 flows to the barrel from the discharge port 9 with large flow, the weighter weighs the mass in the barrel in real time, when the mass of the raw material in the barrel and the weight of the required raw material are different by 5ml, the control system gives the command, the first pair of photoelectric switch 3 receives the signal and makes the electromagnetic valve 5 control the first air inlet pipe 11 to be in the disconnected state, at this time the first reset spring 19 rebounds to reset the sleeve 17 and plunger 20, the plunger 20 blocks the discharge port 9, the second pair of photoelectric switch 4 receives the signal and makes the electromagnetic valve 5 control the second air inlet pipe 12 to be in the communicating state, the gas of the second air inlet pipe 12 leads to the wide accommodating area 15, the gas drives the top shaft 22 to move downwards, the top shaft 22 moves downwards to drive the middle shaft 21, the middle shaft 21 moves downwards, the lower end moves to the inverted funnel area 33, at this time the sealing ring 32 enters the inverted funnel area 33, namely the sealing ring 32 does not close contact with the inner wall of the sleeve 17, and the flow channel groove 31 is communicated with the flow channel through hole 34 and the inverted funnel area 33, at this time the raw material of the feeding pipe 10 flows between the shell 36 and the sleeve 17, then sequentially flows through the flow channel through hole 34, the flow channel groove 31, the inverted funnel area 33, the fine channel 13 and then flows out from the discharge port 9 with small flow, the weighter measures that the mass of the raw material in the barrel is equal to the weight of the required raw material, the control system gives the command to the second pair of photoelectric switch 4 and the third pair of photoelectric switch 24 at the same time, the electromagnetic valve 5 controls the second air inlet pipe 12 to be in the disconnected state, the middle shaft 21 resets under the action of the second reset spring 23, the sealing ring 32 moves upwards to the sleeve 17 from the inverted funnel area 33, at this time the sealing ring 32 plays a sealing role between the inner wall of the sleeve 17 and the middle shaft 21, the raw material cannot flow from the flow channel through hole 34 to the fine channel 13, the sealing ring 32 has the back suction effect to the material ball in the fine channel 13 in the process of rising, and the relay 28 drives the translation driving part 26 to start, the shielding plate 27 moves to the below of the discharge port 9, blocks the raw material in the discharge port 9, avoids the raw material to drop into the barrel, the raw material drops in the recess 29 and is discharged from the discharge pipe 30, thereby realizing the intelligent and rapid weighing.

[0059] The utility model adopts the transmission signal of the photoelectric switch to the electromagnetic valve 5 and relay 28, transmission signal is fast, can reflect in time.

[0060] The above description is merely that of a specific implementation of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Accordingly, the present application is not to be limited to these embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure of a pneumatic control valve for a photoelectric switch, characterized by comprising: The application relates to a valve body and a shell, the shell is provided with a pair of light receiving and emitting switches and a control switch group, the pair of light receiving and emitting switches comprises a first pair of light receiving and emitting switches and a second pair of light receiving and emitting switches, the control switch group comprises two electromagnetic valves, the first pair of light receiving and emitting switches and the second pair of light receiving and emitting switches are electrically connected with the two electromagnetic valves respectively, and the two electromagnetic valves are used for controlling opening and closing of a large valve and a small valve of the valve body according to signals of the first pair of light receiving and emitting switches and the second pair of light receiving and emitting switches.

2. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 1, wherein The shell is further provided with an obstacle for the pair of light receiving and emitting switches, and the obstacle is used for cooperating with the pair of light receiving and emitting switches to receive a signal of a batching vehicle.

3. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 1, wherein The valve body comprises an outer shell, a large valve and a small valve arranged in the outer shell, the outer shell is provided with a discharge port, a feeding pipe, a first air inlet pipe and a second air inlet pipe, and the small valve is provided with a fine channel. When air is supplied to the first air inlet pipe, the large valve is away from the discharge port, and the feeding pipe is directly communicated with the discharge port. When air is supplied to the second air inlet pipe, the small valve is close to the discharge port, and the feeding pipe is communicated with the discharge port through the fine channel.

4. The gas-operated control valve structure for a beam photoelectric switch according to claim 3, wherein The outer shell is internally provided with a narrow accommodating area and a wide accommodating area, the discharge port, the narrow accommodating area and the wide accommodating area are sequentially communicated, and the narrow accommodating area is provided with an air inlet area. The large valve comprises a sleeve and a plunger, the sleeve is used for sleeving the small valve, the plunger is partially arranged at a bottom end of the sleeve and is partially inserted into the discharge port, a top end of the sleeve is provided with a widened portion, the sleeve and the plunger are arranged in the narrow accommodating area, the widened portion is located in the wide accommodating area, and the first air inlet pipe is located below the widened portion and is communicated with the air inlet area. When air is supplied to the first air inlet pipe, the sleeve drives the plunger to be away from the discharge port, so that the feeding pipe is directly communicated with the discharge port.

5. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 4, wherein The small valve comprises a middle shaft and a top shaft arranged in sequence from bottom to top, the middle shaft is arranged in the sleeve and partially protrudes upwardly from the widened portion, a lower end of the middle shaft is provided with a flow channel groove and a sealing ring sleeved thereon, the sealing ring is arranged below the flow channel groove, and the top shaft is arranged in the wide accommodating area; and the second air inlet pipe is connected with the wide accommodating area. A bottom end opening of the sleeve is provided with an inverted funnel area which is narrow at top and wide at bottom, a side wall of the sleeve is provided with a flow channel through hole, and the fine channel is arranged on the plunger. When air is supplied to the second air inlet pipe, the top shaft drives the middle shaft to enter the inverted funnel area, so that the feeding pipe, the flow channel through hole, the flow channel groove, the fine channel and the discharge port are sequentially communicated.

6. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 5, wherein The large valve further comprises a first reset spring, the first reset spring is arranged in the wide accommodating area, and the first reset spring is located between the sleeve and the top shaft.

7. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 5, wherein The middle shaft is provided with a cover body at a top end thereof, the small valve comprises a second reset spring, the second reset spring is sleeved on the middle shaft and located between the cover body and the widened portion.

8. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 3, wherein The fine channel is narrow at bottom and wide at top.

9. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 1, wherein The pair of photoelectric switches further include a third pair of photoelectric switches, and the control switch further includes a relay, the third pair of photoelectric switches being electrically connected to the relay. The device further includes a shielding assembly, the shielding assembly including a translation driving element and a shielding plate, the translation driving element being arranged on the housing, the shielding plate being connected to an output shaft of the translation driving element, the relay being electrically connected to the third pair of photoelectric switches and the translation driving element.

10. The structure of a pneumatic control valve for a beam photoelectric switch according to claim 9, wherein The first pair of photoelectric switches, the second pair of photoelectric switches and the third pair of photoelectric switches are infrared pairs of photoelectric switches or laser pairs of photoelectric switches.

Images