A control valve equipped with a smart valve positioner

Abstract

The present invention relates to the technical field of control valves, and particularly relates to a control valve equipped with an intelligent valve positioner, including a valve positioner, an adjusting pipe, an adjusting cylinder, and a locking mechanism. A number of columns of equally spaced water passing holes are provided on the pipe wall of the adjusting pipe. One end of the adjusting pipe is communicated with a water inlet pipe through a water inlet chamber, and the other end is sealed. The cavity outside the adjusting pipe is communicated with a water outlet pipe. By pre-filling the left air pressure chamber and the right air pressure chamber with high-pressure gas for pushing the adjusting cylinder to move, and the locking mechanism is used to lock and fix the adjusting cylinder. By equipping with an intelligent valve positioner, the response time of the control valve can be greatly shortened. By pre-filling the left air pressure chamber and the right air pressure chamber with high-pressure gas, after the intelligent valve positioner receives a signal and opens the positioning lock, the high-pressure gas can immediately push the adjusting cylinder to move, thereby realizing the adjustment of the medium flow rate. It is not only sensitive in response and fast in action, but also can greatly shorten the entire adjustment process.

Description

Technical Field

[0001] The present invention relates to the technical field of control valves, and particularly to a control valve equipped with an intelligent valve positioner. Background Art

[0002] There are many types of control valves, but all of them need to be equipped with various power sources for autonomous regulation. Generally, by adjusting the opening of the valve, the regulation of parameters such as the flow rate, pressure, temperature, and liquid level of the medium can be achieved. According to the power source, control valves are divided into electric control valves, pneumatic control valves, hydraulic power control valves, etc.

[0003] No matter which type of control valve, it generally takes a relatively long time to complete the regulation. Currently, many control valves are equipped with various control valves, especially equipped with intelligent valve positioners, which can greatly shorten the control response time of the control valve, but the action time of the control valve itself has not been improved.

[0004] For example, the action time of an electric control valve specifically depends on various factors such as the performance of the electric valve itself, the structure of the actuator, and the stability of the power supply. Currently, highly sensitive control valves that can quickly complete regulation often have a complex structure and a high cost. Even so, the action time of an electric control valve is generally more than 2 seconds, and some are even close to one minute. And there are requirements for the regulation time of the control valve in many scenarios. Even if there are no strict requirements, it is generally hoped that the control valve is more sensitive and the regulation completion time is shorter.

[0005] In addition, in order to ensure the sealing performance, the valve core inside the control valve needs to fit very closely with other parts, which causes the valve core inside the control valve to be worn due to strong friction every time it moves, and it is easy to cause problems with the sealing performance inside the control valve after long-term use. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a control valve equipped with an intelligent valve positioner to solve the problem in the prior art that the reaction time and action time of the control valve are relatively long, resulting in the inability to quickly complete the regulation.

[0007] Based on the above purpose, the present invention provides a control valve equipped with an intelligent valve positioner, including a valve positioner installed on the control valve body. The control valve further includes:

[0008] A main pipe for regulating the liquid flow rate. An inlet water chamber is provided at the right end of the main pipe. A water inlet pipe is connected to the inlet water chamber, and a water outlet pipe is connected to the main pipe.

[0009] A regulating pipe disposed inside the main pipe. A number of rows of equally spaced water passing holes are provided on the pipe wall of the regulating pipe. One end of the regulating pipe is communicated with the water inlet pipe through a water inlet chamber, and the other end is sealed. The water outlet pipe is communicated with the cavity between the main pipe and the regulating pipe.

[0010] A regulating cylinder slidably connected inside the regulating pipe. The two sides of the regulating cylinder are respectively connected to a left air pressure chamber and a right air pressure chamber through a left connecting pipe and a right connecting pipe. High-pressure gas is filled in the two air pressure chambers in advance to push the regulating cylinder to move.

[0011] A locking mechanism disposed on the left connecting pipe for locking and fixing the regulating cylinder. The locking mechanism is composed of a number of rows of equally spaced positioning locks.

[0012] An anti-wear sealing assembly disposed between the regulating pipe and the regulating cylinder to prevent the sealing performance from being reduced due to long-term wear. The anti-wear sealing assembly includes a number of plugging plates slidably connected to the side wall of the regulating cylinder. The plugging plates are attached to the inner side of the water passing holes and are slidably connected to the pipe wall of the regulating pipe.

[0013] Furthermore, a through hole communicating with the external atmosphere is provided on the left air pressure chamber, and a left air outlet valve is also provided at this through hole. A through hole communicating with the external atmosphere is also provided on the right air pressure chamber, and a right air outlet valve is also provided at this through hole. The left air pressure chamber is communicated with a left air compressor through a pipe, and a left air inlet valve is also provided on this pipe. The right air pressure chamber is communicated with a right air compressor through a pipe, and a right air inlet valve is also provided on this pipe.

[0014] Furthermore, the regulating pipe is fixedly connected inside the main pipe. The main pipe and the water inlet chamber are separated by a partition plate. The partition plate is fixedly connected to the port of the regulating pipe, and a through port with the same inner diameter as the regulating pipe is also provided at the center of the partition plate.

[0015] Furthermore, a left operating rod is fixedly connected to the left side of the regulating cylinder. The outer end of the left operating rod is fixedly connected to a left piston plate. The left piston plate is movably connected inside the left connecting pipe, and the inner cavity of the left connecting pipe on the left side of the left piston plate is communicated with the left air pressure chamber.

[0016] Furthermore, a right operating rod is provided on the right side of the regulating cylinder. The left end of the right operating rod is located inside the regulating cylinder, and the right operating rod is slidably connected to the regulating cylinder. The right end of the right operating rod is fixedly connected to a right piston plate, and the right piston plate is slidably connected inside the right connecting pipe. The inner cavity of the right connecting pipe on the right side of the right piston plate is communicated with the right air pressure chamber.

[0017] Furthermore, a rubber liquid bag is also provided inside the regulating cylinder. The plugging plates are located outside the rubber liquid bag. A number of slide rails are fixedly connected to the outer wall of the regulating cylinder. The slide rails are arranged in a staggered manner with the positions of the water passing holes of the regulating pipe. Slide grooves cooperating with the slide rails are provided on the inner wall of the regulating pipe.

[0018] Further, a push plate is fixedly connected to the left end of the right operating rod. The push plate is movably connected inside the adjusting cylinder, and a check mechanism is further provided at the connection between the right operating rod and the adjusting cylinder. The check mechanism includes a rack provided on the outer surface of the right operating rod and a ratchet rotatably connected to the adjusting cylinder. The ratchet engages with the rack.

[0019] Further, the positioning lock includes an electromagnetic coil fixedly connected to the left connecting pipe and a block slidably connected inside the left connecting pipe. A block groove penetrating through the front and rear is provided in the inner wall of the left connecting pipe. The block is slidably connected in the block groove. A slide rod passes through and is slidably connected in the electromagnetic coil. The front end of the slide rod is slidably connected to the rear end face of the block and cannot be disengaged. The arrangement quantity of the positioning locks is the same as the arrangement quantity of the water through holes, and the distance between adjacent two columns of the locking mechanisms is the same as the distance between adjacent two columns of the water through holes.

[0020] Further, a metal disk is also fixedly connected to the slide rod. A return spring is sleeved on the slide rod between the metal disk and the electromagnetic coil. Two ends of the return spring are respectively connected to the metal disk and the electromagnetic coil.

[0021] Further, a buffer block is also provided in the block groove. A buffer groove is also provided inside the left connecting pipe. The inner end of the buffer block is slidably connected in the buffer groove, and the outer end of the buffer block is slidably connected to the block. A buffer spring is also provided in the buffer groove. The upper and lower ends of the buffer spring are respectively connected to the bottom end of the buffer block and the bottom of the buffer groove.

[0022] The beneficial effects of the present invention are as follows: 1. By equipping the regulating valve with an intelligent valve positioner, the response time of the regulating valve can be greatly shortened. And in the main body part of the regulating valve, that is, on both sides of the main pipe, a left air pressure chamber and a right air pressure chamber are provided. By pre-filling the left air pressure chamber and the right air pressure chamber with high-pressure gas, after the intelligent valve positioner receives a signal and opens the positioning lock, the high-pressure gas can immediately push the adjusting cylinder to move, thereby realizing the adjustment of the medium flow rate. It is not only sensitive in response, but also very fast in adjustment action, and can greatly shorten the entire adjustment process.

[0023] 2. A number of columns of equally spaced water through holes are provided on the pipe wall of the regulating pipe. Each time a column of water through holes is released by the adjusting cylinder, it is equivalent to amplifying the medium flow rate by one level. The number of columns of water through holes can be set in advance to set the number of levels of medium flow rate adjustment. By setting the corresponding number of columns of positioning locks, when it is necessary to adjust the flow rate of the corresponding level, only the opening and closing of the positioning locks at the corresponding positions and quantities need to be controlled simultaneously, which not only makes the adjustment faster, but also the adjustment result is very accurate.

[0024] 3. A return spring is arranged inside the metal disc. When the electromagnetic coil is de-energized, it can drive the stopper to extend and block the left piston plate, restricting the movement of the left piston plate and thus restricting the movement of the adjusting cylinder. At the same time, electromagnetic valves with a similar principle are also provided at the inlets and outlets of the left air pressure chamber and the right air pressure chamber. When power and air are cut off, the left air pressure chamber and the right air pressure chamber can maintain a state of being filled with air, restricting the movement of the adjusting cylinder. Therefore, this solution can keep the position of the valve at the previous moment in case of power failure, air cut-off or signal interruption and other unexpected situations, avoiding chaos.

[0025] 4. An anti-wear sealing assembly is arranged between the adjusting pipe and the adjusting cylinder. By setting a movable sealing plate to block the water passing hole, a rubber liquid bag is arranged inside the sealing plate, and the rubber liquid bag supports the sealing plate outwards. Therefore, even if there is wear between the sealing plate and the inner wall of the adjusting pipe, it can ensure that the outside of the sealing plate always fits tightly against the inner wall of the adjusting pipe, ensuring the sealing performance. At the same time, a check mechanism is set so that the right operating rod can only push the rubber liquid bag inwards through the push plate all the time, ensuring that the rubber liquid bag can always maintain sufficient outward supporting force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the left side view of the present invention.

[0028] Figure 2 It is a schematic diagram of the overall structure of the right side view of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the valve body in the device of the present invention.

[0030] Figure 4 It is a schematic diagram of the internal structure of the main pipe in the device of the present invention.

[0031] Figure 5 It is a schematic diagram of the connection structure between the adjusting pipe and the adjusting cylinder in the device of the present invention.

[0032] Figure 6 It is a schematic diagram of the structure of the adjusting cylinder in the device of the present invention.

[0033] Figure 7 It is a schematic diagram of the internal structure of the present invention.

[0034] Figure 8 It is Figure 7 an enlarged view of part A in

[0035] Figure 9 It is a schematic diagram of the internal structure of the adjusting cylinder in the device of the present invention.

[0036] Figure 10 is Figure 9 an enlarged view of part B in

[0037] Figure 11 It is a schematic diagram of the internal principle of the valve positioner in the device of the present invention.

[0038] The labels in the figure are:

[0039] 101, valve positioner; 102, main pipe; 103, water inlet chamber; 104, water inlet pipe; 105, water outlet pipe; 106, left connecting pipe; 107, left air pressure chamber; 108, locking mechanism; 109, left intake valve; 110, left outlet valve; 111, right connecting pipe; 112, right air pressure chamber; 113, right intake valve; 114, right outlet valve; 115, partition board; 116, adjusting pipe; 117, water through hole; 118, adjusting cylinder; 119, left operating rod; 120, right operating rod; 121, left piston plate; 122, right piston plate; 123, positioning lock; 124, left air compressor; 125, right air compressor; 126, electromagnetic coil; 127, sliding rod; 128, metal disc; 129, return spring; 130, stop block groove; 131, stop block; 132, buffer groove; 133, buffer block; 134, buffer spring; 135, slide rail; 136, sealing plate; 137, chute; 138, rubber liquid bag; 139, push plate; 140, rack; 141, pawl. Specific Embodiments

[0040] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments.

[0041] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0042] In the first aspect of the present invention, as shown in Figure 1 , Figure 2 and Figure 7 , in order to minimize the total time for the regulating valve to complete regulation, a two-pronged approach is needed, and improvements are made from both the reaction time and the action time aspects. Among them, in order to shorten the action time of the regulating valve, first, the main body part of the regulating valve is set as the main pipe 102 plus the water inlet chamber 103. The water inlet chamber 103 is connected to the right end of the main pipe 102. The water inlet pipe 104 is connected to the water inlet chamber 103, and the outlet pipe 105 is connected to the main pipe 102. The regulating pipe 116 is fixedly connected inside the main pipe 102. The main pipe 102 and the water inlet chamber 103 are separated by a partition 115. The partition 115 is fixedly connected to the port of the regulating pipe 116, and a through hole with the same inner diameter as the regulating pipe 116 is provided at the center of the partition 115.

[0043] The structural principle of the liquid flow regulating mechanism is as shown in Figure 4 , Figure 5 and Figure 6 , and is realized by providing several columns of equally spaced water passing holes 117 on the pipe wall of the regulating pipe 116 and slidably connecting a regulating cylinder 118 inside the regulating pipe 116. One end of the regulating pipe 116 is communicated with the water inlet pipe 104 through the water inlet chamber 103, and the other end is always blocked by the regulating cylinder 118, so it is equivalent to being sealed. The outside of the water passing hole 117 is the cavity between the main pipe 102 and the regulating pipe 116, and the outlet pipe 105 is communicated with the cavity between the main pipe 102 and the regulating pipe 116.

[0044] Therefore, by controlling the position change of the regulating cylinder 118, the number of columns of water passing holes 117 released can be controlled. Each time the regulating cylinder 118 releases one column of water passing holes 117, it is equivalent to increasing the medium flow rate by one level, thereby realizing the regulation of the liquid flow rate. In addition, the number of levels of medium flow rate regulation can be set by presetting the number of columns of water passing holes 117 in advance.

[0045] The driving of the position change of the regulating cylinder 118 is pushed by the high-pressure gas in the left air pressure chamber 107 and the right air pressure chamber 112. The two sides of the regulating cylinder 118 are respectively connected to the left air pressure chamber 107 and the right air pressure chamber 112 through the left connecting pipe 106 and the right connecting pipe 111. The two air pressure chambers are filled with high-pressure gas in advance to push the regulating cylinder 118 to move.

[0046] In addition, as shown in Figure 7 , a locking mechanism 108 is provided on the left connecting pipe 106 for locking and fixing the regulating cylinder 118. The locking mechanism 108 is composed of several columns of equally spaced positioning locks 123. The arrangement quantity of the positioning locks 123 is the same as the arrangement quantity of the water passing holes 117, and the distance between adjacent two columns of the locking mechanism 108 is the same as the distance between adjacent two columns of the water passing holes 117.

[0047] Therefore, by setting the number of columns of the positioning locks 123 corresponding to the levels, when it is necessary to adjust the flow rate of the corresponding level, it is only necessary to simultaneously control the opening and closing of the positioning locks 123 at the corresponding positions and quantities, so that the water passing holes 117 corresponding to the released number of columns can be controlled, and then the levels of the liquid flow rate can be controlled. This not only makes the adjustment faster, but also the adjustment result is very accurate.

[0048] Among them, in order to shorten the response time of the regulating valve, an intelligent valve positioner 101 is configured and installed on the regulating valve body. The intelligent valve positioner 101 includes a CPU, a pressure sensor, a power module, and a solenoid valve driving module, which can not only greatly shorten the response time of the regulating valve, but also have an insurance function in case of accidents.

[0049] The second aspect of the present invention is as Figure 7 、 Figure 8 and Figure 9 shown. In order to shorten the response time of the regulating valve, pressure sensors are installed in the left air pressure chamber 107 and the right air pressure chamber 112. A through hole communicating with the external atmosphere is provided on the left air pressure chamber 107, and a left air outlet valve 110 is also provided at this through hole. A through hole communicating with the external atmosphere is also provided on the right air pressure chamber 112, and a right air outlet valve 114 is also provided at this through hole. The left air pressure chamber 107 is communicated with the left air compressor 124 through a pipeline, and a left air inlet valve 109 is also provided on this pipeline. In addition, the right air pressure chamber 112 is communicated with the right air compressor 125 through a pipeline, and a right air inlet valve 113 is also provided on this pipeline.

[0050] The intelligent valve positioner 101 includes a CPU, a pressure sensor, a power module, and a solenoid valve driving module. The pressure sensor and the power module are connected to the input side of the CPU. The output side of the CPU is connected to the electromagnetic coils 126 in the left air inlet valve 109, the left air outlet valve 110, the right air inlet valve 113, the right air outlet valve 114, and the positioning lock 123, and a solenoid valve driving module is also provided between the CPU and each solenoid valve. In addition, an A / D converter control is also provided between the pressure sensor, the power module and the CPU. The power module can adopt a DC power supply with a rated voltage of 24V or an AC power supply with an effective voltage of 220V.

[0051] By equipping the regulating valve with an intelligent valve positioner, the response time of the regulating valve can be greatly shortened. And in the main body part of the regulating valve, that is, on both sides of the main pipe 102, the left air pressure chamber 107 and the right air pressure chamber 112 are provided. By pre-filling the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas, after the intelligent valve positioner receives a signal and opens the positioning lock 123, the high-pressure gas can immediately push the adjusting cylinder 118 to move, thereby realizing the adjustment of the medium flow rate. It is not only sensitive in response, but also very fast in adjustment action, and can greatly shorten the entire adjustment process.

[0052] The third aspect of the present invention is as Figure 3 , Figure 7 and Figure 8 shown. A left operating rod 119 is fixedly connected to the left side of the adjusting cylinder 118. The outer end of the left operating rod 119 is fixedly connected to a left piston plate 121. The left piston plate 121 is movably connected within the left connecting pipe 106, and the inner cavity of the left connecting pipe 106 on the left side of the left piston plate 121 communicates with the left air pressure chamber 107. And a right operating rod 120 is provided on the right side of the adjusting cylinder 118. The outer end of the right operating rod 120 is fixedly connected to a right piston plate 122. The right piston plate 122 is movably connected within the right connecting pipe 111, and the inner cavity of the right connecting pipe 111 on the right side of the right piston plate 122 communicates with the right air pressure chamber 112.

[0053] The positioning lock 123 includes an electromagnetic coil 126 fixedly connected to the left connecting pipe 106 and a stopper 131 slidably connected within the left connecting pipe 106. A stopper groove 130 that penetrates through the front and rear is provided in the inner wall of the left connecting pipe 106. The stopper 131 is slidably connected within the stopper groove 130. A slide rod 127 passes through and is slidably connected within the electromagnetic coil 126. The front end of the slide rod 127 is slidably connected to the rear end face of the stopper 131 and cannot be disengaged.

[0054] In addition, a metal disk 128 is fixedly connected to the slide rod 127. A return spring 129 is also sleeved on the slide rod 127 between the metal disk 128 and the electromagnetic coil 126. The two ends of the return spring 129 are respectively connected to the metal disk 128 and the electromagnetic coil 126.

[0055] Therefore, when the electromagnetic coil 126 is not energized, the stopper 131 extends forward to block the left piston plate 121, restricting the movement of the left piston plate 121, and further restricting the movement of the adjusting cylinder 118. And when it is necessary to control the movement of the adjusting cylinder 118 to adjust the liquid flow rate. Only need to control the electromagnetic coil 126 in the positioning locks 123 at the corresponding positions and quantities to be energized. The metal disk 128 will be adsorbed and thus retracted into the stopper groove 130. At this time, the left piston plate 121 is released. Therefore, under the action of the high-pressure gas in the left air pressure chamber 107 or the right air pressure chamber 112, the adjusting cylinder 118 will move left or right. Further, more water passing holes 117 are opened or more water passing holes 117 are blocked, thereby realizing the adjustment of the liquid flow rate.

[0056] It should be particularly noted that only one of the high-pressure gases in the left air pressure chamber 107 or the right air pressure chamber 112 will act at the same time. When the high-pressure gas in one of the air pressure chambers acts, the air outlet valve in the other air pressure chamber will be opened immediately to avoid the situation of interfering and competing forces.

[0057] In addition, a buffer block 133 is provided in the stop block groove 130. A buffer groove 132 is also provided in the left connecting pipe 106. The inner end of the buffer block 133 is slidably connected in the buffer groove 132, and the outer end of the buffer block 133 is slidably connected to the stop block 131. A buffer spring 134 is further provided in the buffer groove 132. The upper and lower ends of the buffer spring 134 are respectively connected to the bottom end of the buffer block 133 and the bottom of the buffer groove 132.

[0058] Therefore, the left piston plate 121 moves rapidly under the action of high-pressure gas and finally hits the next non-retracted stop block 131. However, due to the action of the buffer block 133 and the buffer spring 134, the impact caused by the collision can be greatly reduced, and the service life of the device can be improved.

[0059] The fourth aspect of the present invention, as Figure 4 , Figure 5 , Figure 7 , Figure 9 and Figure 10 shown, the anti-wear sealing assembly between the adjusting pipe 116 and the adjusting cylinder 118 prevents the sealing performance from being reduced due to long-term wear. The anti-wear sealing assembly includes a plurality of plugging plates 136 slidably connected to the side wall of the adjusting cylinder 118. The plugging plate 136 is attached to the inner side of the water passing hole 117 and is slidably connected to the pipe wall of the adjusting pipe 116.

[0060] Specifically, a rubber liquid sac 138 is further provided in the adjusting cylinder 118. The plugging plate 136 is located outside the rubber liquid sac 138. A plurality of slide rails 135 are fixedly connected to the outer wall of the adjusting cylinder 118. The slide rails 135 are arranged in a staggered manner with the water passing holes 117 of the adjusting pipe 116. A chute 137 cooperating with the slide rails 135 is provided on the inner wall of the adjusting pipe 116.

[0061] The left end of the right operating rod 120 is fixedly connected with a push plate 139. The push plate 139 is movably connected in the adjusting cylinder 118. A check mechanism is further provided at the connection between the right operating rod 120 and the adjusting cylinder 118. The check mechanism includes a rack 140 provided on the outer surface of the right operating rod 120 and a ratchet 141 rotatably connected to the adjusting cylinder 118. The ratchet 141 meshes with the rack 140.

[0062] By providing a movable plugging plate 136 to block the water passing hole 117, a rubber liquid sac 138 is arranged inside the plugging plate 136, and the rubber liquid sac 138 supports the plugging plate 136 outward. Therefore, even if there is wear between the plugging plate 136 and the inner wall of the adjusting pipe 116, it can be ensured that the outer side of the plugging plate 136 is always closely attached to the inner wall of the adjusting pipe 116 to ensure the sealing performance. At the same time, a check mechanism is provided, so that the right operating rod 120 can only always push the rubber liquid sac 138 inward through the push plate 139, ensuring that the rubber liquid sac 138 can always maintain sufficient outward supporting force.

[0063] Embodiment: Assume that the flow rate is adjusted from the original state where 4 columns of water holes 117 are opened to a state where 10 columns of water holes 117 are opened.

[0064] Therefore, before adjustment, the left piston plate 121 is located between the 4th and 5th positioning locks 123, that is, between the 4th and 5th stoppers 131, and is blocked by both. After the intelligent valve positioner 101 receives the adjustment signal, first, all the electromagnetic coils 126 in the positioning locks 123 from the 5th to the 10th column are energized. After the electromagnetic coils 126 are energized, the metal disks 128 are adsorbed and retracted, and the stoppers 131 are retracted into the stopper grooves 130 through the slide bars 127.

[0065] At the same time, the left air outlet valve 110 on the left air pressure chamber 107 is opened, and the high-pressure gas in the left air pressure chamber 107 is released. Therefore, only the high-pressure gas in the right air pressure chamber 112 acts, pushing the right piston plate 122 to move leftward, and then driving the adjustment cylinder 118 and the left piston plate 121 to move leftward together until the left piston plate 121 abuts against the stopper 131 in the 11th column positioning lock 123.

[0066] Subsequently, all the electromagnetic coils 126 are powered off again. When the electromagnetic coils 126 are not powered on, all the stoppers 131 protrude forward to block the left piston plate 121 and limit the movement of the left piston plate 121. At this time, the left piston plate 121 is stuck between the 10th and 11th column stoppers 131. Therefore, the adjustment cylinder 118 releases 10 columns of water holes 117 to achieve the predetermined flow rate adjustment, and the whole process is fast and sensitive.

[0067] Similarly, when the flow rate needs to be decreased, the electromagnetic coils 126 in the corresponding-positioned and -numbered positioning locks 123 are energized, and the metal disks 128 will be adsorbed and retracted into the stopper grooves 130.

[0068] At this time, the left piston plate 121 is released, the right air outlet valve 114 on the right air pressure chamber 112 is opened, and the high-pressure gas in the right air pressure chamber 112 is released. Therefore, only the high-pressure gas in the left air pressure chamber 107 acts, pushing the left piston plate 121 to move rightward, and then causing the adjustment cylinder 118 to block more columns of water holes 117 to achieve a decrease in the flow rate.

[0069] After the flow rate adjustment is completed, all the electromagnetic coils 126 are powered off. When the electromagnetic coils 126 are not powered on, all the stoppers 131 protrude forward to block the left piston plate 121 and limit the movement of the left piston plate 121. The left air outlet valve 110 and the right air outlet valve 114 are both closed. After closing, the left air inlet valve 109 and the right air inlet valve 113 are opened, and the left air compressor 124 and the right air compressor 125 refill the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas for the next use.

[0070] In summary, by equipping the regulating valve with an intelligent valve positioner, the present invention can greatly shorten the response time of the regulating valve. In the main body part of the regulating valve, that is, on both sides of the main pipe 102, a left air pressure chamber 107 and a right air pressure chamber 112 are provided. By pre-filling the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas, after the intelligent valve positioner receives a signal and opens the positioning lock 123, the high-pressure gas can immediately push the adjusting cylinder 118 to move, thereby realizing the adjustment of the medium flow rate. It is not only sensitive in response, but also very fast in adjustment action, and can greatly shorten the entire adjustment process. And a number of columns of equally spaced water passing holes 117 are provided on the pipe wall of the adjusting pipe 116. Each time a column of water passing holes 117 is released by the adjusting cylinder 118, it is equivalent to amplifying the medium flow rate by one level. The number of columns of water passing holes 117 can be set in advance to set the number of levels of medium flow rate adjustment. By setting the number of columns of positioning locks 123 corresponding to the number of levels, when it is necessary to adjust the flow rate of the corresponding number of levels, only the opening and closing of the positioning locks 123 at the corresponding positions and in the corresponding quantities need to be controlled simultaneously, which not only makes the adjustment faster, but also the adjustment result is very accurate. A return spring 129 is provided inside the metal disk 128, which can drive the stopper 131 to protrude to block the left piston plate 121 and limit the movement of the left piston plate 121, and further limit the movement of the adjusting cylinder 118 when the electromagnetic coil 126 is not powered. At the same time, electromagnetic valves with a similar principle are also provided at the inlets and outlets of the left air pressure chamber 107 and the right air pressure chamber 112. When power and gas are cut off, the left air pressure chamber 107 and the right air pressure chamber 112 can maintain a full-air state to limit the movement of the adjusting cylinder 118. Therefore, this solution can keep the position of the valve at the previous moment in case of accidents such as power failure, gas cut-off or signal cut-off, avoiding chaos.

[0071] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0072] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A regulating valve equipped with an intelligent valve positioner, comprising a valve positioner (101) mounted on a regulating valve body, characterized in that: The regulating valve also includes: A main pipe (102) for regulating the flow of liquid, a water inlet tank (103) being arranged at the right end of the main pipe (102), a water inlet pipe (104) being connected to the water inlet tank (103), and a water outlet pipe (105) being connected to the main pipe (102); A regulating pipe (116) is arranged inside the main pipe (102), wherein a plurality of rows of water holes (117) arranged at equal intervals are provided on the pipe wall of the regulating pipe (116), one end of the regulating pipe (116) is connected to the water inlet pipe (104) through the water inlet bin (103), and the other end is sealed, and the water outlet pipe (105) is connected to the cavity between the main pipe (102) and the regulating pipe (116); An adjusting cylinder (118) is slidably connected to the inside of the adjusting tube (116), wherein two sides of the adjusting cylinder (118) are respectively connected to a left air pressure chamber (107) and a right air pressure chamber (112) via a left connecting tube (106) and a right connecting tube (111), and the two air pressure chambers are filled with high-pressure gas in advance to push the adjusting cylinder (118) to move; A locking mechanism (108) disposed on the left connecting tube (106) for locking and fixing the adjusting cylinder (118), wherein the locking mechanism (108) is composed of a plurality of rows of equidistantly arranged positioning locks (123); An anti-wear sealing assembly is arranged between the regulating tube (116) and the regulating cylinder (118) to prevent long-term wear from reducing the sealing performance, the anti-wear sealing assembly comprising a plurality of sealing plates (136) slidably connected to the side wall of the regulating cylinder (118), the sealing plates (136) being attached to the inner side of the water through hole (117) and slidably connected to the tube wall of the regulating tube (116); The left air pressure chamber (107) is provided with a through hole communicating with the outside atmosphere, and a left air outlet valve (110) is also provided at the through hole; the right air pressure chamber (112) is also provided with a through hole communicating with the outside atmosphere, and a right air outlet valve (114) is also provided at the through hole; the left air pressure chamber (107) is communicated with a left air pressure pump (124) via a pipeline, and a left air inlet valve (109) is also provided on the pipeline; the right air pressure chamber (112) is communicated with a right air pressure pump (125) via a pipeline, and a right air inlet valve (113) is also provided on the pipeline; A rubber liquid bag (138) is further provided in the regulating tube (118), the blocking plate (136) is located outside the rubber liquid bag (138), a plurality of slide rails (135) are further fixedly connected to the outer wall of the regulating tube (118), the slide rails (135) and the water holes (117) of the regulating tube (116) are arranged in a staggered manner, and a slide groove (137) cooperating with the slide rails (135) is provided on the inner wall of the regulating tube (116); The positioning lock (123) comprises an electromagnetic coil (126) fixedly connected to the left connecting tube (106) and a block (131) slidably connected to the left connecting tube (106); a block groove (130) penetrating from front to back is provided in the inner wall of the left connecting tube (106); the block (131) is slidably connected to the block groove (130); a sliding rod (127) passes through and is slidably connected to the electromagnetic coil (126); the front end of the sliding rod (127) is slidably connected to the rear end surface of the block (131) and cannot be detached; the number of the positioning locks (123) arranged is the same as the number of the water holes (117); and the spacing between two adjacent rows of locking mechanisms (108) is the same as the spacing between two adjacent rows of water holes (117).

2. A regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: The regulating pipe (116) is fixedly connected inside the main pipe (102); the main pipe (102) and the water inlet tank (103) are separated by a partition (115); the partition (115) is fixedly connected to a port of the regulating pipe (116); and a through opening having the same inner diameter as the regulating pipe (116) is also provided at the center of the partition (115).

3. The regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: The left side of the regulating cylinder (118) is fixedly connected to a left operating rod (119), the outer end of the left operating rod (119) is fixedly connected to a left piston plate (121), the left piston plate (121) is movably connected in the left connecting tube (106), and the inner cavity of the left connecting tube (106) on the left side of the left piston plate (121) is in communication with the left air pressure chamber (107).

4. The regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: A right operating rod (120) is provided on the right side of the regulating cylinder (118); the left end of the right operating rod (120) is located in the regulating cylinder (118), and the right operating rod (120) is slidably connected to the regulating cylinder (118); the right end of the right operating rod (120) is fixedly connected to a right piston plate (122), and the right piston plate (122) is slidably connected in a right connecting tube (111); the inner cavity of the right connecting tube (111) on the right side of the right piston plate (122) is connected to the right air pressure chamber (112).

5. The regulating valve equipped with an intelligent valve positioner according to claim 4, characterized in that: A push plate (139) is fixedly connected to the left end of the right operating rod (120), and the push plate (139) is movably connected in the adjustment cylinder (118). A non-return mechanism is also provided at the connection between the right operating rod (120) and the adjustment cylinder (118), and the non-return mechanism comprises a rack (140) provided on the outer surface of the right operating rod (120) and a ratchet (141) rotatably connected to the adjustment cylinder (118), and the ratchet (141) is meshed with the rack (140).

6. The regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: A metal disk (128) is also fixedly connected to the slide bar (127), and a return spring (129) is also sleeved on the slide bar (127) between the metal disk (128) and the electromagnetic coil (126), with two ends of the return spring (129) respectively connected to the metal disk (128) and the electromagnetic coil (126).

7. The regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: A buffer block (133) is also provided in the block groove (130), a buffer groove (132) is also provided in the left connecting pipe (106), an inner end of the buffer block (133) is slidably connected in the buffer groove (132), and an outer end of the buffer block (133) is slidably connected to the block (131), a buffer spring (134) is also provided in the buffer groove (132), and upper and lower ends of the buffer spring (134) are respectively connected to the bottom end of the buffer block (133) and the bottom of the buffer groove (132).

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