Novel wine rice machine

Abstract

The utility model discloses a novel wine rice machine which comprises a polished rice bin and a pounding chamber arranged at the lower end of the polished rice bin, and an elevator is arranged on one side of the polished rice bin and one side of the pounding chamber. A switching valve device is installed at the upper end of the polished rice bin and arranged on one side of the elevator. An elevator rack for supporting the elevator is mounted on the outer side of the elevator; a vibration bran removing device is arranged at the lower end of the fine smashing chamber; a weighing device and a flow control device are arranged at the lower end of the polished rice bin. The novel wine rice machine designed by the utility model is more compact in overall structure, the occupied space is reduced, the processing efficiency, the weighing precision and the like are remarkably improved, and the novel wine rice machine better meets the market requirements.

Description

Technical Field

[0001] This utility model relates to the field of rice wine processing technology, and in particular to a novel rice wine processing machine. Background Technology

[0002] As a key piece of equipment for processing brewing raw materials (such as rice), the rice brewing machine efficiently removes impurities such as bran and broken rice, and performs fine grinding and grading of the grains to ensure that the brewing raw materials meet high-standard process requirements. This equipment integrates multiple technical processes including screening, grinding, weighing, and precise control to achieve comprehensive processing of the grains.

[0003] During our research and development, we discovered that existing rice milling machine technology has shortcomings that need improvement. Current technology generally uses a rotating screen cylinder, which, while achieving basic screening, makes the screen components prone to damage due to prolonged material impact, affecting screening efficiency and equipment lifespan. Furthermore, to control processing volume, the grains in the rice silo are weighed. Conventional rice milling machines use a lever mechanism to lift the entire rice silo and a top-mounted load sensor for weight measurement. This weighing method suffers from inaccurate weighing accuracy and places high demands on the strength of the lead screw, increasing equipment complexity and maintenance costs. A baffle plate is typically installed at the discharge port of the rice milling chamber to assist in the discharge of rice during processing. However, existing baffle plate designs cannot be flexibly adjusted according to processing conditions, limiting the equipment's adaptability and ability to operate continuously for extended periods, resulting in low efficiency. During rice milling, the feed flow rate is typically controlled using a combination of a linear motor and a contact switch as the positioning signal. However, with prolonged use, the contact switch is prone to deviation and may even fail to reach the limit switch, affecting the accuracy and stability of material feeding.

[0004] In conclusion, although existing rice brewing machines meet the processing needs of brewing raw materials to a certain extent, there is still significant room for improvement in terms of efficiency and weighing accuracy. Therefore, it is necessary to develop a new type of rice brewing machine to overcome the above-mentioned shortcomings and improve its overall performance. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of rice wine machine, which solves the problems in the prior art where the screen assembly is easily damaged due to prolonged material impact during screen cylinder rotation, affecting screening efficiency and equipment life; the weighing method of using a pull rod to lift the entire rice silo for weighing grains has inaccurate weighing accuracy; the guide plate cannot be flexibly adjusted according to the processing conditions, limiting the adaptability and long-term continuous working capability of the equipment; and the existing technology uses a combination of linear stroke motor and contact switch to control the feed flow, which, under long-term use, is prone to contact switch deviation or even failure to reach the limit switch, affecting the accuracy and stability of feed.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel rice wine making machine includes: a rice polishing bin and a grinding chamber disposed at the lower end of the rice polishing bin, wherein a lifting machine is provided on one side of the rice polishing bin and the grinding chamber;

[0008] A switching valve device is installed at the upper end of the rice milling bin, and the switching valve device is located on one side of the elevator;

[0009] A hoist frame for supporting the hoist is installed on the outside of the hoist;

[0010] The lower end of the pounding chamber is equipped with a vibration desiccant device;

[0011] A weighing device and a flow control device are also provided between the rice polishing bin and the rice grinding chamber.

[0012] Preferably, the switching valve device includes a circulating processing passage, a discharge passage, a swing cylinder that drives the switching passage baffle, and a direction indicator that is simultaneously driven by the swing cylinder to indicate the direction of the passage.

[0013] The circulating processing passage is connected to the inlet of the rice milling bin, and a magnetic separator for screening metal objects in the grain is provided on this side of the circulating processing passage.

[0014] Preferably, the discharge port of the pounding chamber is connected to the vibrating de-chaff removal device, and a guide plate controlled by a solenoid valve is provided at the discharge port of the pounding chamber.

[0015] Preferably, the vibratory de-branching device includes a motor, a screen assembly, and an eccentric shaft on one side of the screen assembly, all mounted on the de-branching support. The motor drives the pulley to rotate and the eccentric shaft to rotate via a coupling, thereby driving the screen assembly to move back and forth and up and down.

[0016] Preferably, the screen assembly includes a screen mounted on a screen frame and elastic balls located on the screen, the elastic balls impacting to separate the bran from the grain.

[0017] Preferably, a counterweight is provided on one side of the pulley to counteract the impact of the eccentric shaft rotation on the vibration of the screen assembly.

[0018] Preferably, the screen assembly also includes a discharge port for discharging bran powder and broken rice, and a circulation port connected to the feed channel. Under the action of the elevator, the screened grains are sent from the circulation port to the circulating processing path via the elevator.

[0019] Preferably, the weighing device is mounted on an L-shaped support, and the weighing device includes several sets of weighing units, which are evenly distributed around the circumference of the rice milling bin.

[0020] Preferably, the flow control device is mounted on the L-bracket, and the flow control device includes a flow valve for adjusting the discharge flow rate of the rice milling bin and a cylinder for driving the flow valve, the flow valve being located at the lower end of the rice milling bin.

[0021] Preferably, a plurality of limit switches are provided on the cylinder, and the limit switches correspond to a plurality of flow levels on the flow valve. The cylinder drives the flow valve to move up or down to the selected flow level, and the limit switches lock the cylinder after receiving a signal.

[0022] The beneficial effects of this utility model are:

[0023] (1) The new rice milling machine designed in this utility model has a more compact overall structure, which reduces the space occupied. By evenly distributing several sets of weighing units around the circumference of the rice milling bin, the stability of the weighing structure is improved. When the grain enters the rice milling bin, the weight units detect the weight data at different positions in the rice milling bin, sum the obtained weight values ​​and calculate the average value to obtain the final quantity value, which greatly improves the weighing accuracy and solves the problem of inaccurate weighing accuracy in the existing technology of using a lever to lift the entire rice milling bin to weigh the grain.

[0024] (2) The new rice wine machine designed in this utility model, through the design of the flow control device, enables the rice wine machine to better control the feed flow of grains during use. The cylinder and the flow valve work together. When the cylinder stroke rod moves downward, the lever arm lifts the flow valve to reach the selected flow level. The limit switch receives the signal and locks the cylinder. The level can be adjusted at any time according to the processing situation. It is stable and easy to operate. It solves the problem that in the prior art, the feed flow is controlled by using a combination of linear stroke motor and contact switch. After long-term use, the contact switch is prone to deviation or even fails to reach the limit. The cylinder structure is relatively stable and the safety performance is improved.

[0025] (3) The novel rice wine machine designed in this utility model has a vibration chaff removal device with an eccentric shaft structure and a counterweight, which makes the chaff removal process stable and efficient, and the screen assembly is not easily damaged. At the same time, the screen assembly adopts a detachable structure, which is convenient for subsequent maintenance. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a novel rice wine machine according to this utility model;

[0027] Figure 2 This is a schematic diagram of the switching valve device in the rice wine machine shown.

[0028] Figure 3 This is a schematic diagram of the pounding chamber structure in the rice wine machine shown.

[0029] Figure 4 This is a three-dimensional structural diagram of the vibrating chaff removal device in the rice wine machine shown.

[0030] Figure 5 This is a schematic diagram of the eccentric shaft in the vibratory chaff removal device shown.

[0031] Figure 6 This is a schematic diagram of the counterweight in the vibratory chaff removal device shown.

[0032] Figure 7 This is a three-dimensional structural diagram of the weighing device and flow control device in the rice wine machine shown.

[0033] Figure 8 This is a schematic diagram of the flow control device shown.

[0034] The components in the attached diagram are labeled as follows:

[0035] 1. Feeding platform; 2. Elevator; 3. Switching valve device; 3-1. Circulation processing passage; 3-2. Discharge passage; 3-3. Magnetic separator; 3-4. Direction indicator; 3-5. Swing cylinder; 4. Rice silo; 5. Weighing device; 6. Flow control device; 6-1. Flow valve; 6-2. Cylinder; 6-3. Lever arm; 6-4. Limit switch; 7. Compressing chamber; 8. Guide plate; 9. Vibrating de-branching device; 9-1. De-branching bracket; 9-2. Motor; 9-3. Pulley; 9-4. Screen assembly; 9-5. Eccentric shaft; 9-6. Elastic ball; 9-7. Counterweight; 9-8. Handle; 9-9. Detachable bolt; 9-10. Bran discharge port; 9-11. Circulation port; 10. Elevator frame; 11. Solenoid valve; 12. L-bracket. Detailed Implementation

[0036] The preferred embodiments of the present invention will be described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0037] Example:

[0038] This embodiment, in conjunction with the accompanying drawings, introduces a novel rice wine making machine proposed by this utility model.

[0039] like Figure 1 As shown, Figure 1 This is a three-dimensional structural diagram of a novel rice wine making machine according to this utility model. The novel rice wine making machine includes: a rice polishing chamber 4 and a grinding chamber 7 disposed at the lower end of the rice polishing chamber 4; a lifting mechanism 2 is disposed on one side of the rice polishing chamber 4 and the grinding chamber 7.

[0040] A switching valve device 3 is installed at the upper end of the rice milling bin 4, and the switching valve device 3 is located on one side of the elevator 2;

[0041] A hoist frame 10 for supporting the hoist 2 is installed on the outside of the hoist 2;

[0042] A vibration desiccant device 9 is installed at the lower end of the pounding chamber 7;

[0043] A weighing device 5 and a flow control device 6 are also installed between the rice milling chamber 4 and the rice polishing chamber 7.

[0044] Combination Figure 2 As shown, Figure 2 This is a schematic diagram of the switching valve device in the rice wine machine. In a preferred embodiment, to improve production efficiency, the switching valve device is designed with two passages. The switching valve device 3 includes a circulating processing passage 3-1 and a discharge passage 3-2. A switching passage baffle, driven by a swing cylinder 3-5, is installed between the two passages to separate them, allowing grain to directly enter the selected passage without leakage. Simultaneously, to facilitate direct observation of the grain's entry into the passage, the switching device also includes a direction indicator 3-4, driven by the swing cylinder 3-5, to indicate the passage direction. When the fed grain is about to enter the selected passage, such as the circulating processing passage, the swing cylinder 3-5 drives the switching passage baffle to block the discharge passage 3-2, and simultaneously, the swing cylinder 3-5 also drives the direction indicator 3-4 to turn towards the circulating processing passage side.

[0045] Furthermore, the outlet of the circulating processing passage 3-1 is connected to the inlet at the top of the rice milling bin 4.

[0046] To improve grain screening efficiency, a magnetic separator 3-3 for screening metals in grains is also provided on the side of the recycling processing passage 3-1.

[0047] like Figure 3 As shown, Figure 3 This is a schematic diagram of the milling chamber structure in the rice milling machine. In a preferred embodiment, the discharge port at the lower end of the rice milling bin 4 is connected to the feed port of the milling chamber. Grains enter the milling chamber from the rice milling bin 4 and are ground by the sand rollers inside the milling chamber. The discharge port of the milling chamber 7 is connected to the vibrating de-chaff removal device 9, and the ground grains enter the vibrating de-chaff removal device 9. A guide plate 8 controlled by a solenoid valve 11 is installed at the discharge port of the milling chamber 7. The opening and closing of the guide plate is controlled according to the pressure inside the milling chamber to ensure the flow of grains. The guide plate can be adjusted according to the actual processing conditions.

[0048] In this invention, the flow guide plate is controlled by a solenoid valve, which can be flexibly adjusted according to the processing conditions, thereby improving the adaptability of the equipment and its ability to work continuously for a long time, and increasing production efficiency.

[0049] Combination Figure 4-6 As shown, Figure 4 This is a three-dimensional structural diagram of the vibrating hull removal device in the rice wine machine shown. Figure 5 This is a schematic diagram of the eccentric shaft in the vibratory chaff removal device shown. Figure 6 This is a schematic diagram of the counterweight in the vibratory chaff removal device shown.

[0050] In a preferred embodiment, the grain, after being milled in the pounding chamber, enters a vibrating dehulling device. This vibrating dehulling device 9 includes a motor 9-2, a pulley 9-3, a screen assembly 9-4, and an eccentric shaft 9-5, all housed within a casing. The motor 9-2 and the screen assembly 9-4 are both mounted on a dehulling support 9-1. The eccentric shaft 9-5 is positioned on one side of the screen assembly 9-4. The motor 9-2 drives the pulley 9-3 to rotate, and through a coupling, causes the eccentric shaft 9-5 to rotate, thereby driving the screen assembly 9-4 to move back and forth and up and down.

[0051] The screen assembly includes a screen mounted on a screen frame and elastic balls 9-6 located on the screen. The impact of the elastic balls separates the bran from the grain. The screen assembly also includes a bran removal chamber, which is the space where the grain enters. The screen frame, screen, elastic balls, etc. are all located in the bran removal chamber. When the grain enters the bran removal chamber, the bran and broken rice in the grain are separated by the impact of the screen and elastic balls.

[0052] In the preferred embodiment, an eccentric shaft is designed to enable the screen to move up, down, left, and right to achieve a vibration effect. However, the eccentric shaft design also makes the screen prone to excessive vibration during the chaff removal process, leading to easy damage to the screen and poor chaff removal effect. Therefore, a counterweight block 9-7 is set on one side of the pulley to counteract the impact of the eccentric shaft rotation on the screen assembly vibration and prevent excessive screen vibration.

[0053] In the preferred embodiment, the screen assembly can be replaced with screens of different mesh sizes according to different processing stages. A handle 9-8 is provided at one end of the screen frame for easy pulling of the screen assembly, and detachable bolts 9-9 are provided on both sides of the handle 9-8. These detachable bolts install the screen frame onto the de-branching chamber. For maintenance, the outer casing of the vibrating de-branching device is opened, and then the detachable bolts on the screen assembly are removed. The screen assembly can then be manually pulled out using the handle, which is simple, convenient, and easy to replace.

[0054] In a preferred embodiment, the screen assembly 9-4 further includes a bran discharge port 9-10 for discharging bran powder and broken rice, and a circulation port 9-11 connected to the feed channel. After passing through the screen assembly, the bran powder and other particles in the grain are completely separated from the grain. The screened bran powder and broken rice are discharged directly from the bran discharge port. The circulation port is connected to the feed channel, and under the action of the elevator, the screened grain is sent from the circulation port to the circulating processing passage 3-1 via the elevator, where it is circulated for de-branching according to processing requirements.

[0055] In the preferred embodiment, this novel rice wine machine designed by this utility model can not only remove chaff from grains through vibration, but also process grains in a cyclic manner according to processing requirements, and can also accurately weigh grains.

[0056] like Figure 7 As shown, Figure 7 This is a three-dimensional structural diagram of the weighing device and flow control device in the rice wine machine shown.

[0057] The weighing device 5 is located at the lower end of the rice milling bin 4 and is mounted on the L-shaped support 12. The weighing device 5 includes several sets of weighing units. To improve the accuracy of weighing, the sets of weighing units are evenly distributed around the circumference of the rice milling bin.

[0058] In the preferred embodiment, three sets of weighing units are evenly distributed along the rice milling bin, forming a three-point distribution structure. This three-point distribution structure improves the accuracy and stability of the weighing system. When the grain enters the rice milling bin, the three weighing units respectively detect the weight data at three different locations within the bin, sum the three weight values, calculate the average value, and finally output the grain weight as the calculated average.

[0059] This weighing device belongs to the existing technology. The weighing unit can be implemented using various pressure measurement methods, which will not be described in detail. If a strain gauge load cell is selected as the weighing unit, the weighing principle is similar to that of an electronic scale. A strain gauge load cell is installed at the bottom of the rice milling hopper. When the grain enters the rice milling hopper, the weight of the hopper is transferred to the sensor through the support structure, causing the elastic body inside the sensor to deform. The sensor converts the weight into an electrical signal. Since the electrical signal output by the sensor is usually weak, it needs to be amplified. Therefore, the electrical signal is amplified in the electrical control cabinet, and the amplified signal is output to the control display screen for the operator to read and record.

[0060] The three-point design makes the structure more stable and the measurement accuracy more precise. The obtained weight is converted and reflected on the matching touch screen.

[0061] In the preferred embodiment, the rice milling silo 4 has a large storage capacity. To prevent obstruction or blockage when grains are discharged from the rice milling silo 4, this invention incorporates a flow control device 6 between the rice milling silo 4 and the milling chamber 7. This flow control device not only controls the discharge flow rate but also assists the weighing device in cutting off the lower outlet of the rice milling silo 4 and preventing grain discharge when weighing the grains.

[0062] like Figure 8 As shown, Figure 8This is a schematic diagram of the flow control device shown. The flow control device 6 is mounted on the L-bracket 12. The flow control device 6 includes a flow valve 6-1 for adjusting the discharge flow rate of the rice milling bin 4, and a cylinder 6-2 for driving the flow valve 6-1. The flow valve 6-1 is located at the lower end of the rice milling bin 4.

[0063] Several limit switches 6-4 are installed on cylinder 6-2, corresponding to several flow levels on flow valve 6-1. Cylinder 6-2 drives flow valve 6-1 upward or downward to the selected flow level. After receiving the signal, limit switch 6-4 locks the cylinder. For example, when the cylinder stroke rod moves downward, it lifts flow valve 6-1 through lever arm 6-3 to the selected flow level. After receiving the signal, the limit switch locks the cylinder. By observing the grain grinding process, a suitable level can be selected to adjust the grain discharge flow rate. At the same time, when weighing the grain, the pneumatically driven lever arm fully lifts the flow valve, closing the rice silo discharge port for easy weighing.

[0064] In a preferred embodiment, six limit switches are provided on the cylinder, each corresponding to one of the six positions of the flow valve. The limit switches form six positions from 0 to 5, where 0 is fully closed and 5 is fully open. When the corresponding position is reached, the indicator light illuminates.

[0065] The working principle of this rice wine machine:

[0066] Feeding stage: The grain to be processed enters through the feeding platform 1, and the elevator 2 transports the grain along the feeding channel to the switching valve 3;

[0067] Pathway selection: Switching valve 3 selects the path according to the processing stage. For initial processing or cyclic processing, the cyclic processing path is selected, and the grain enters the rice milling bin 4; after processing, the grain is discharged through the discharge channel 3-2.

[0068] Rice processing: Weighing is determined based on processing requirements. Weighing is performed by weighing device 5, which can weigh both unprocessed and processed grains before they enter the subsequent processing flow.

[0069] Milling process: The grains are milled in the milling chamber 7. After processing, the grains are automatically separated by a guide plate 8 at the discharge port and then enter the vibrating chaff removal screen 9 for chaff removal.

[0070] Bran removal: In the vibrating chaff removal device 9, under the action of the chaff screening components, the bran powder and broken rice are screened out. The screened bran powder and broken rice are discharged through the bran discharge port 9-10. The remaining grain (qualified grain) is processed for recycling depending on the processing requirements.

[0071] Circular processing logic: If further processing is required, qualified grains return from the circulation port 9-11, pass through the feeding channel and the circular processing path 3-1, and re-enter the rice milling bin 4. The number of cycles is determined by the processing step requirements (target accuracy or weight). Each cycle can repeat the weighing, milling, and bran removal steps.

[0072] Finished product discharge: After processing, switching valve 3 is switched to the discharge passage, and the grain is discharged through this passage.

[0073] This novel rice milling machine features a more compact overall structure, reducing space occupation and allowing for multiple processing cycles to improve production efficiency. It also increases processing capacity from 900 kg to 24,000 kg, better meeting market demands. The vibrating chaff removal device significantly improves chaff screening efficiency, reduces screen damage, and facilitates easy replacement and maintenance. The weighing device is structurally more stable, with weighing units evenly distributed around the rice milling bin. The final weight is calculated by averaging the measured values, greatly improving weighing accuracy and stability. Actual production testing shows a measurement accuracy error of no more than ±5 kg (processing capacity of 2.4 t), solving the problem of inaccurate weighing in existing technologies that use a lever to lift the entire rice milling bin. The guide plate design also improves flexibility, allowing for real-time adjustment of the guide plate's state based on rice variety and processing conditions. This effectively controls grain flow, improving processing accuracy and preventing machine stalling. The design of the flow control device enables the rice wine machine to better control the feed flow of grains during use. It is easy to operate and solves the problem that in the existing technology, the feed flow is controlled by a combination of linear stroke motor and contact switch. Over long-term use, the contact switch is prone to deviation or even fails to reach the limit. In addition, the cylinder structure is relatively stable and the safety performance is improved.

[0074] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel wine rice machine characterized by, include: The rice milling bin (4) and the rice milling chamber (7) located at the lower end of the rice milling bin (4) are provided with a lifting machine (2) on one side of the rice milling bin (4) and the rice milling chamber (7); A switching valve device (3) is installed at the upper end of the rice milling bin (4), and the switching valve device is located on one side of the elevator (2); The hoist (2) is equipped with a hoist frame (10) for supporting the hoist (2) on its outer side; The lower end of the pounding chamber (7) is provided with a vibration desiccant device (9); A weighing device (5) and a flow control device (6) are also provided between the rice polishing bin (4) and the rice pounding chamber (7).

2. A novel wine-rice machine according to claim 1, characterized in that, The switching valve device (3) includes a circulating processing passage (3-1), a discharge passage (3-2), a swing cylinder (3-5) that drives the switching passage baffle, and a direction indicator (3-4) that is driven by the swing cylinder (3-5) to indicate the direction of the passage. The circulating processing passage (3-1) is connected to the inlet of the rice milling bin (4), and a magnetic separator (3-3) for screening metal objects in grains is provided on the circulating processing passage (3-1).

3. A novel wine-rice machine according to claim 1, characterized in that, The discharge port of the pounding chamber (7) is connected to the vibrating de-chaff removal device (9), and a guide plate (8) controlled by a solenoid valve (11) is provided at the discharge port of the pounding chamber (7).

4. A novel wine-rice machine according to claim 1, characterized in that, The vibrating de-branching device (9) includes a motor (9-2), a screen assembly (9-4), and an eccentric shaft (9-5) on one side of the screen assembly (9-4). The motor (9-2) drives the pulley (9-3) to rotate and the eccentric shaft (9-5) to rotate through the coupling, thereby driving the screen assembly (9-4) to move back and forth and up and down.

5. A novel wine-rice machine according to claim 4, characterized in that, The screen assembly (9-4) includes a screen mounted on a screen frame and elastic balls (9-6) located on the screen, the elastic balls (9-6) striking to separate the bran from the grain.

6. A novel wine-rice machine according to claim 4, characterized in that, A counterweight (9-7) is provided on one side of the pulley (9-3) to counteract the impact of the rotation of the eccentric shaft (9-5) on the vibration of the screen assembly (9-4).

7. A novel wine-rice machine according to claim 4, characterized in that, The screen assembly (9-4) also includes a discharge port (9-10) for discharging bran powder and broken rice, and a circulation port (9-11) connected to the feed channel. Under the action of the elevator (2), the screened grains are sent from the circulation port to the circulation processing path via the elevator (2).

8. A novel wine-rice machine according to claim 1, characterized in that, The weighing device (5) is located at the lower end of the rice milling bin (4) and is mounted on the L-bracket (12). The weighing device (5) includes several sets of weighing units, which are evenly distributed around the rice milling bin (4).

9. A novel wine-rice machine according to claim 1, characterized in that, The flow control device (6) is mounted on the L bracket (12); the flow control device (6) includes a flow valve (6-1) for adjusting the discharge flow of the rice milling bin (4) and a cylinder (6-2) for driving the flow valve (6-1), the flow valve (6-1) being located at the lower end of the rice milling bin (4).

10. A novel rice wine making machine according to claim 9, characterized in that, Several limit switches (6-4) are arranged on the cylinder (6-2), which correspond to several flow rate positions on the flow valve (6-1). The cylinder (6-2) drives the flow valve (6-1) to the selected flow rate position upward or downward, and the limit switch (6-4) locks the cylinder (6-2) after receiving the signal.

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