Water reducing agent storage tank

Abstract

The utility model discloses a water reducing agent storage tank which comprises a tank body, a tank cover is arranged at an opening of the tank body, a gas storage box and a plurality of groups of gas storage cylinders are installed on the upper portion of the tank cover, a first suction pump, a suction dual-purpose gas pump and a second suction pump are installed on the upper portion of the gas storage box, and a discharging hopper fixedly penetrates through the lower portion of the tank body. An electric gate valve is installed at the discharging end of the discharging hopper, two sets of supporting frames are installed on the side wall of the tank body, the side walls of the two sets of supporting frames are slidably connected with protective square pipes in a sleeving mode, an upper liquid level sensor and a lower liquid level sensor fixedly penetrate through the side wall of the tank body, and connecting pipes fixedly penetrate through the multiple sets of air storage cylinders and the air storage box. And filter screen pore plates are mounted in the openings of the multiple groups of air storage cylinders. The water reducing agent storage tank has the advantages that the gas storage tank and the gas storage cylinder are arranged, the tank cover can be conveniently and rapidly disassembled and assembled through the gas storage tank and the gas storage cylinder, and convenience is brought to disassembly and assembly of the tank cover of the water reducing agent storage tank.

Description

Technical Field

[0001] This utility model relates to the field of water-reducing agent storage technology, specifically, to a water-reducing agent storage tank. Background Technology

[0002] Water-reducing agents are concrete admixtures that reduce the amount of mixing water while maintaining the slump of concrete. They can improve the fluidity of concrete mixtures or reduce the amount of cement used per unit while maintaining fluidity, thereby saving cement. Water-reducing agents are widely used in many fields such as construction engineering, precast component production, and special engineering. Water-reducing agents are currently stored in storage tanks and have advantages such as structural stability, simple operation, and good protective effect in actual use.

[0003] The prior art discloses a water-reducing agent storage tank with application number CN202221183670.8. In the above-mentioned utility model, the installation of the tank cover requires multiple locking strips to be inserted into the interior of multiple limiting frames. The installation and removal of the multiple locking strips need to be done sequentially, which brings inconvenience to the installation and removal of the tank cover of this utility model. At the same time, the four rollers require four sleeves for protection. The movement of the four sleeves requires manual operation by the operator. Since the sleeves themselves have their own weight, the operator will accelerate the consumption of physical strength by lifting the four sleeves one by one, which reduces the practicality of this utility model. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a water-reducing agent storage tank, which has the advantages of easy disassembly and assembly of the tank lid and a protective structure with labor-saving and convenient displacement rollers, thereby solving the problems mentioned in the background technology.

[0005] To achieve the advantages of convenient disassembly and assembly of the tank lid and the labor-saving and convenient protective structure of the displacement rollers, the specific technical solution adopted by this utility model is as follows: A water-reducing agent storage tank includes a tank body, a tank lid is provided at the opening of the tank body, and an air storage box and multiple sets of air storage cylinders are installed on the upper part of the tank lid. A first suction pump, a suction / discharge dual-purpose air pump, and a second suction pump are installed on the upper part of the air storage box. A hopper is fixedly inserted through the lower part of the tank body, and an electric slide valve is installed at the discharge end of the hopper. Two sets of support frames are installed on the side wall of the tank body, and protective square tubes are slidably sleeved on the side walls of both sets of support frames. An upper liquid level sensor and a lower liquid level sensor are fixedly inserted through the side wall of the tank body. Each of the aforementioned air storage cylinders and air storage boxes is fixedly connected by a connecting pipe. Each of the openings of the air storage cylinders has a perforated filter plate installed inside. Each of the perforated filter plates has a connecting rod slidingly passing through its interior. Each of the connecting rods has a piston plate installed at its inner end. Each of the connecting rods has a limit plate fixedly fitted to its outer sidewall. Each of the connecting rods has a spring fitted to its sidewall. The sidewall of the tank is fitted with multiple right-angle brackets and an electrical control box. Each right-angle bracket has an insertion hole on its far side. The electrical control box contains a control panel, an alarm, a controller, and a battery. The output end of the dual-purpose suction and suction air pump is connected to an air inlet pipe, one end of which is inserted into the air storage box.

[0006] Furthermore, each of the two sets of support frames has an installation slot on one side, and an installation shaft is installed inside each of the two sets of installation slots via bearings. Guide wheels are fixedly sleeved on the side walls of each of the two sets of installation shafts, and pull ropes are wound around the side walls of each of the two sets of guide wheels. Counterweight blocks are installed on the opposing surfaces of each of the two sets of protective square tubes, and a first connecting lug is installed on the upper part of each of the two sets of counterweight blocks. A brake plate is installed on the lower part of each of the two sets of counterweight blocks. A frame is installed on the far side of each of the two sets of support frames, and a second connecting lug is installed on the upper part of each of the two sets of frames. The two ends of each of the two sets of pull ropes are respectively bolted to the first connecting lug and the second connecting lug. Two sets of mounting seats are installed on the outer wall of the hopper, and electromagnets are installed on the lower part of each of the two sets of mounting seats. The two sets of electromagnets are electrically connected to the control panel via wires.

[0007] Furthermore, the inner walls of both sets of protective square tubes are provided with multiple sets of ball sockets, and the interiors of the multiple sets of ball sockets on the same side are provided with balls.

[0008] Furthermore, the diameter of the opening of the ball socket on the same side is smaller than the diameter of the ball.

[0009] Furthermore, the controller is electrically connected to the battery, upper liquid level sensor, lower liquid level sensor and alarm via wires, and the control panel is electrically connected to the battery, electric gate valve, first pump, suction and suction dual-purpose air pump and second pump via wires.

[0010] Furthermore, each of the two sets of support frames is equipped with two sets of self-locking casters at the bottom.

[0011] Furthermore, the output end of the first pump is connected to a feed pipe, and the output end of the second pump is connected to a discharge pipe. One end of the feed pipe and the discharge pipe are inserted into the interior of the tank. Control valves are provided on the side walls of the air inlet pipe, the feed pipe, and the discharge pipe.

[0012] Compared with the prior art, the present invention provides a water-reducing agent storage tank, which has the following beneficial effects:

[0013] (1) This utility model is equipped with an air storage box and an air storage cylinder. When actually using the water-reducing agent storage tank, the tank cover can be used to cover and seal the opening of the tank body. Then, the control panel can be used to make the suction and extraction air pump work. Air can enter the interior of the air storage box through the air inlet pipe. Then, the air can enter the interior of the multiple air storage cylinders through multiple sets of connecting pipes. Finally, the air can push the multiple sets of piston plates away from each other. At the same time, the multiple sets of piston plates and multiple sets of filter screen plates will squeeze the multiple sets of springs. When one end of the multiple sets of connecting rods is inserted into the interior of the multiple sets of insertion holes, the middle set of control valves is closed. Then, the control panel can be used to make the suction and extraction air pump stop working and at the same time make the first pump work. The water-reducing agent can enter the interior of the tank body through the feed pipe. When the liquid level of the water-reducing agent contacts the upper liquid level sensor, the upper liquid level sensor will send a signal to the controller. The controller will then make the alarm work. The operator can use the control panel to stop the first pump by listening to the alarm sound. When the water-reducing agent needs to be discharged, the first pump is activated using the control panel. The water-reducing agent is then discharged from the tank through the discharge pipe. When the water-reducing agent level contacts the lower level sensor, the sensor sends a signal to the controller, which then activates the alarm. The operator can then use the control panel to stop the second pump by listening to the alarm sound. Any remaining water-reducing agent inside the tank can be discharged through the hopper by opening and closing the electric slide valve using the control panel. When the tank cover needs to be removed, the middle set of control valves is opened and closed, and the dual-purpose suction and suction air pump is activated. The dual-purpose suction and suction air pump can draw air from multiple air storage cylinders back into the air storage tank through multiple connecting pipes. At the same time, multiple connecting rods will reset. The tank cover can then be removed. The air storage tank and air storage cylinders facilitate the easy installation and removal of the tank cover, making the installation and removal of the water-reducing agent storage tank cover convenient.

[0014] (2) This utility model is equipped with a support frame and protective square tubes. When the tank is moved to the usage position using four sets of self-locking casters, the control panel is used to de-energize the two sets of electromagnets. Then, the two sets of counterweights can pull the two sets of ropes through the two sets of second connecting ears. The two sets of ropes can drive the two sets of frames to move upward through the two sets of first connecting ears. When the two sets of brake plates contact the ground, the two sets of protective square tubes will cover and seal the four sets of self-locking casters, preventing foreign objects from contacting the four sets of self-locking casters. When it is necessary to move the tank, the operator can step on one set of frames. This set of frames can move the same set of counterweights on the same side through the same set of ropes. When this set of counterweights... When the iron block comes into contact with a set of electromagnets on the same side, the control panel can be used to energize the set of electromagnets on the same side. This set of electromagnets can attract a set of counterweight iron blocks on the same side. The use of the other set of counterweight iron blocks is the same. As can be seen from the operation, during the up and down movement of the two sets of protective square tubes, multiple sets of balls on the same side are subjected to the frictional force of a set of support frames on the same side, and will roll inside multiple sets of ball sockets on the same side. Since the surface of multiple sets of balls on the same side is smooth, it can help the set of protective square tubes on the same side move up and down along a set of support frames on the same side. Through the set support frames and protective square tubes, the protective structure of the displacement rollers can be used in a labor-saving and convenient manner, which improves the practicality of the water-reducing agent storage tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a water-reducing agent storage tank according to an embodiment of the present utility model;

[0017] Figure 2 This is a front view of the support frame according to an embodiment of the present utility model;

[0018] Figure 3 This is a perspective view of the connecting rod according to an embodiment of the present utility model;

[0019] Figure 4 This is a top view of the can lid according to an embodiment of the present utility model;

[0020] Figure 5 According to the embodiments of this utility model Figure 1 Enlarged view of A in the middle;

[0021] Figure 6 According to the embodiments of this utility model Figure 1 A magnified view of B in the middle.

[0022] In the picture:

[0023] 1. Tank body; 2. Tank cover; 3. Gas storage box; 4. Gas storage cylinder; 5. Discharge hopper; 6. Electric slide gate valve; 7. Upper liquid level sensor; 8. Lower liquid level sensor; 9. Support frame; 10. Protective square tube; 11. First pump; 12. Suction pump; 13. Second pump; 14. Connecting pipe; 15. Filter screen plate; 16. Connecting rod; 17. Piston plate; 18. Spring; 19. Limiting hole plate; 20. Right angle frame; 21. Insertion hole; 22. Discharge pipe; 23. Mounting shaft; 24. Guide wheel; 25. Pull rope; 26. Counterweight block; 27. First connecting ear; 28. Second connecting ear; 29. ​​Frame; 30. Brake plate; 31. Ball socket; 32. Ball bearing; 33. Mounting base; 34. Electromagnet. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of the present invention, a water-reducing agent storage tank is provided.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-6As shown, a water-reducing agent storage tank according to an embodiment of the present invention includes a tank body 1. A tank cover 2 is provided at the opening of the tank body 1, and an air storage box 3 and multiple sets of air storage cylinders 4 are installed on the upper part of the tank cover 2. A first suction pump 11, a suction-suction dual-purpose air pump 12, and a second suction pump 13 are installed on the upper part of the air storage box 3. A hopper 5 is fixedly inserted through the lower part of the tank body 1, and an electric slide valve 6 is installed at the discharge end of the hopper 5. Two sets of support frames 9 are installed on the side wall of the tank body 1, and protective square tubes 10 are slidably sleeved on the side wall of both sets of support frames 9. An upper liquid level sensor 7 and a lower liquid level sensor 8 are fixedly inserted through the side wall of the tank body 1. A connecting pipe 14 is fixedly inserted between the multiple sets of air storage cylinders 4 and the air storage box 3. A filter screen plate is installed inside the opening of each set of air storage cylinders 4. 15. Connecting rods 16 slide through the interior of multiple sets of filter screen plates 15. Piston plates 17 are installed on the inner ends of multiple sets of connecting rods 16. Limiting hole plates 19 are fixedly sleeved on the outer side walls of multiple sets of connecting rods 16. Springs 18 are sleeved on the side walls of multiple sets of connecting rods 16. Multiple right-angle brackets 20 and an electrical control box are installed on the side walls of the tank body 1. Insertion holes 21 are opened on the far side of multiple sets of right-angle brackets 20. The electrical control box is equipped with a control panel, an alarm, a controller and a battery. The output end of the suction and suction dual-purpose air pump 12 is connected to an air inlet pipe. One end of the air inlet pipe is inserted into the interior of the air storage tank 3. Through the air storage tank 3 and the air storage cylinder 4, the tank cover 2 can be easily disassembled and assembled, which brings convenience to the disassembly and assembly of the tank cover 2 of the water-reducing agent storage tank.

[0027] In one embodiment, each of the two sets of support frames 9 has a mounting slot on one side, and a mounting shaft 23 is mounted inside each of the two sets of mounting slots via bearings. Guide wheels 24 are fixedly sleeved on the sidewalls of each of the two sets of mounting shafts 23, and pull ropes 25 are wound around the sidewalls of each of the two sets of guide wheels 24. Counterweight blocks 26 are mounted on the facing surfaces of the two sets of protective square tubes 10, and first connecting ears 27 are mounted on the upper parts of each set of counterweight blocks 26. Brake plates 30 are mounted on the lower parts of each set of counterweight blocks 26. The two sets of support frames 9 are located on opposite sides. Both sets of frames 29 are equipped with frames 29, and the upper part of both sets of frames 29 is equipped with second connecting ears 28. The two ends of the two sets of pull ropes 25 are respectively connected to the two sets of first connecting ears 27 and the two sets of second connecting ears 28. The outer wall of the hopper 5 is equipped with two sets of mounting seats 33, and the lower part of the two sets of mounting seats 33 is equipped with electromagnets 34. The two sets of electromagnets 34 are electrically connected to the control panel through wires. Through the set support frame 9 and protective square tube 10, the protective structure of the displacement roller can be provided in a labor-saving and convenient manner, which improves the practicality of the water-reducing agent storage tank.

[0028] In one embodiment, the inner walls of both sets of protective square tubes 10 are provided with multiple sets of ball sockets 31, and the interiors of the multiple sets of ball sockets 31 on the same side are provided with balls 32.

[0029] In one embodiment, the diameter of the opening of the multiple sets of ball sockets 31 on the same side is less than the diameter of the multiple sets of balls 32, so as to prevent the multiple sets of balls 32 on the same side from moving out of the interior of the multiple sets of ball sockets 31 on the same side.

[0030] In one embodiment, the controller is electrically connected to the battery, the upper liquid level sensor 7, the lower liquid level sensor 8, and the alarm via wires. The control panel is electrically connected to the battery, the electric gate valve 6, the first pump 11, the suction and extraction dual-purpose air pump 12, and the second pump 13 via wires. The control circuits of the control panel and the controller can be implemented by simple programming by those skilled in the art and are common knowledge in the field. They are only used and not modified, so the control method and circuit connection will not be described in detail.

[0031] In one embodiment, two sets of self-locking casters are installed on the lower part of both sets of support frames 9.

[0032] In one embodiment, the output end of the first pump 11 is connected to a feed pipe, and the output end of the second pump 13 is connected to a discharge pipe 22. One end of the feed pipe and the discharge pipe 22 are inserted into the interior of the tank body 1, and control valves are provided on the side walls of the air inlet pipe, the feed pipe and the discharge pipe 22.

[0033] Working principle:

[0034] In actual use of the water-reducing agent storage tank, the tank cover 2 can be used to cover and seal the opening of the tank body 1. Then, using the control panel, the suction and extraction dual-purpose air pump 12 can be started. Air can enter the interior of the air storage tank 3 through the air inlet pipe. Then, the air can enter the interior of the multiple air storage cylinders 4 through multiple sets of connecting pipes 14. Finally, the air can push the multiple sets of piston plates 17 away from each other. At the same time, the multiple sets of piston plates 17 and multiple sets of filter screen plates 15 will squeeze the multiple sets of springs 18. When one end of the multiple sets of connecting rods 16 is inserted into the interior of the multiple sets of insertion holes 21, the middle set of control valves is closed. Then, using the control panel, the suction and extraction dual-purpose air pump 12 is stopped, and the first pump 11 is started. The water-reducing agent can enter the interior of the tank body 1 through the feed pipe. When the liquid level of the water-reducing agent contacts the liquid level sensor 7, The upper liquid level sensor 7 sends a signal to the controller, which then activates the alarm. The operator can use the control panel to stop the first pump 11 via the alarm sound. When it is necessary to discharge the water-reducing agent, the operator can use the control panel to activate the first pump 11, allowing the water-reducing agent to be discharged from the tank 1 through the discharge pipe 22. When the water-reducing agent level contacts the lower liquid level sensor 8, the lower liquid level sensor 8 sends a signal to the controller, which then activates the alarm. The operator can use the control panel to stop the second pump 13 via the alarm sound. Any remaining water-reducing agent inside the tank 1 can be discharged through the hopper 5 by opening and closing the electric slide valve 6 via the control panel. When it is necessary to remove the tank cover... At time 2, the middle set of control valves is opened and closed, and the suction and extraction dual-purpose air pump 12 is activated. The suction and extraction dual-purpose air pump 12 can draw the air inside the multiple sets of air storage cylinders 4 back into the air storage tank 3 through multiple sets of connecting pipes 14. At the same time, the multiple sets of connecting rods 16 will perform a reset movement. After that, the tank cover 2 can be removed. Through the set air storage tank 3 and air storage cylinders 4, the tank cover 2 can be easily removed and installed, which brings convenience to the removal and installation of the tank cover 2 of the water-reducing agent storage tank. At the same time, when the tank body 1 is moved to the use position using four sets of self-locking universal wheels, the two sets of electromagnets 34 are de-energized using the control panel. Then, the two sets of counterweight iron blocks 26 can pull the two sets of pull ropes 25 through the two sets of second connecting ears 28. The two sets of pull ropes 25 can drive the two sets of frames 29 to move upward through the two sets of first connecting ears 27. When the two sets of brakes are engaged, the two sets of electromagnets 29 can be moved upward. When the vehicle platform 30 contacts the ground, the two sets of protective square tubes 10 will cover and seal the four sets of self-locking casters, preventing external objects from contacting them. When the tank 1 needs to be moved, the operator can step on a set of frames 29. This set of frames 29 can be used to move a set of counterweight blocks 26 on the same side via a set of pull ropes 25 on the same side. When this set of counterweight blocks 26 contacts a set of electromagnets 34 on the same side, the control panel can be used to energize the set of electromagnets 34 on the same side. This set of electromagnets 34 can attract the set of counterweight blocks 26 on the same side. The use of the other set of counterweight blocks 26 is the same. As can be seen from the operation, during the up and down movement of the two sets of protective square tubes 10, the multiple sets of ball bearings 32 on the same side are subjected to the frictional force of the support frame 9 on the same side, and will roll inside the multiple sets of ball sockets 31 on the same side.Because the surfaces of the multiple sets of ball bearings 32 on the same side are smooth, they can help a set of protective square tubes 10 on the same side move up and down along a set of support frames 9 on the same side. Through the support frames 9 and the protective square tubes 10, the protective structure of the displacement rollers provides a labor-saving and convenient solution, improving the practicality of the water-reducing agent storage tank.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] 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, improvements, etc., 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 water-reducing agent storage tank, comprising a tank body (1), characterized in that, The tank body (1) has a tank cover (2) at its opening, and a gas storage box (3) and multiple sets of gas storage cylinders (4) are installed on the upper part of the tank cover (2). A first suction pump (11), a suction and extraction dual-purpose air pump (12), and a second suction pump (13) are installed on the upper part of the gas storage box (3). A hopper (5) is fixedly inserted through the lower part of the tank body (1), and an electric slide valve (6) is installed at the discharge end of the hopper (5). Two sets of support frames (9) are installed on the side wall of the tank body (1), and protective square tubes (10) are slidably sleeved on the side wall of both sets of support frames (9). An upper liquid level sensor (7) and a lower liquid level sensor (8) are fixedly inserted through the side wall of the tank body (1). A connecting pipe (14) is fixedly inserted between the multiple sets of gas storage cylinders (4) and the gas storage box (3). The opening of the cylinder (4) is equipped with a filter screen plate (15). The filter screen plates (15) are slidably penetrated by connecting rods (16). The inner end of the connecting rods (16) is equipped with a piston plate (17). The outer end sidewall of the connecting rods (16) is fixedly sleeved with a limit hole plate (19). The sidewall of the connecting rods (16) is sleeved with a spring (18). The sidewall of the tank (1) is equipped with a right angle bracket (20) and an electrical control box. The far side of the right angle bracket (20) is provided with a socket (21). The electrical control box is equipped with a control panel, an alarm, a controller and a battery. The output end of the suction and suction air pump (12) is connected to an air inlet pipe, and one end of the air inlet pipe is inserted into the air storage tank (3).

2. The water-reducing agent storage tank according to claim 1, characterized in that, Both sets of support frames (9) have mounting slots on one side, and mounting shafts (23) are installed inside the mounting slots via bearings. Guide wheels (24) are fixedly sleeved on the side walls of both sets of mounting shafts (23). Pull ropes (25) are wound around the side walls of both sets of guide wheels (24). Counterweight blocks (26) are installed on the facing surfaces of both sets of protective square tubes (10). First connecting ears (27) are installed on the upper part of both sets of counterweight blocks (26), and first connecting ears (27) are installed on the lower part of both sets of counterweight blocks (26). There is a brake plate (30), and frames (29) are installed on the far side of the two sets of support frames (9), and second connecting ears (28) are installed on the upper part of the two sets of frames (29). The two ends of the two sets of pull ropes (25) are respectively bolted to the two sets of first connecting ears (27) and the two sets of second connecting ears (28). Two sets of mounting seats (33) are installed on the outer wall of the hopper (5), and electromagnets (34) are installed on the lower part of the two sets of mounting seats (33). The two sets of electromagnets (34) are electrically connected to the control panel through wires.

3. A water-reducing agent storage tank according to claim 2, characterized in that, The inner walls of both sets of protective square tubes (10) are provided with multiple sets of ball sockets (31), and the interior of the multiple sets of ball sockets (31) on the same side is provided with balls (32).

4. A water-reducing agent storage tank according to claim 3, characterized in that, The diameter of the opening of the ball socket (31) on the same side is smaller than the diameter of the ball (32).

5. A water-reducing agent storage tank according to claim 1, characterized in that, The controller is electrically connected to the battery, the upper liquid level sensor (7), the lower liquid level sensor (8) and the alarm via wires. The control panel is electrically connected to the battery, the electric gate valve (6), the first pump (11), the suction and suction dual-purpose air pump (12) and the second pump (13) via wires.

6. A water-reducing agent storage tank according to claim 1, characterized in that, Both sets of support frames (9) are equipped with two sets of self-locking casters at the bottom.

7. A water-reducing agent storage tank according to claim 1, characterized in that, The output end of the first pump (11) is connected to the feed pipe, and the output end of the second pump (13) is connected to the discharge pipe (22). One end of the feed pipe and the discharge pipe (22) are inserted into the interior of the tank (1). The side walls of the air inlet pipe, the feed pipe and the discharge pipe (22) are all equipped with control valves.

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