Regulating valve provided with intelligent valve positioner

Abstract

The invention relates to the technical field of regulating valve control, in particular to a regulating valve provided with an intelligent valve positioner, which comprises a valve positioner, a regulating pipe, a regulating cylinder and a locking mechanism. A plurality of limber holes distributed at equal intervals are formed in the pipe wall of the adjusting pipe, one end of the adjusting pipe is communicated with the water inlet pipe through the water inlet bin, the other end of the adjusting pipe is sealed, and a cavity outside the adjusting pipe is communicated with the water outlet pipe. The left air pressure bin and the right air pressure bin are filled with high-pressure gas in advance and used for pushing the adjusting cylinder to move, and the locking mechanism is used for locking and fixing the adjusting cylinder. By arranging the intelligent valve positioner, the reaction time of the regulating valve can be greatly shortened, the left air pressure bin and the right air pressure bin are filled with high-pressure gas in advance, after the intelligent valve positioner receives a signal and opens a positioning lock, the high-pressure gas can immediately push the regulating cylinder to move, then the medium flow is regulated, the reaction is sensitive, and the working efficiency is improved. The action is rapid, and the whole adjusting process can be greatly shortened.

Description

Technical Field

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

[0002] There are many kinds of regulating valves, but they all need to be equipped with various power sources for autonomous regulation. Generally, the opening of the valve is adjusted to adjust the medium flow, pressure, temperature, liquid level and other parameters. According to the power source, the regulating valve is divided into electric regulating valve, pneumatic regulating valve, hydraulic power regulating valve and other types.

[0003] Regardless of the type of control valve, it generally takes a long time to complete the adjustment. Currently, many control valves are equipped with various control valves, especially 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 depends on many factors, such as the performance of the electric valve itself, the structure of the actuator, and the stability of the power supply. The current highly sensitive control valves that can quickly complete the adjustment are often complex in structure and very expensive. However, even so, the action time of an electric control valve is generally more than 2 seconds, and some are even close to one minute. However, many scenarios require the time for the control valve to adjust. Even if there are no strict requirements, it is generally hoped that the control valve is as sensitive as possible and the time to complete the adjustment is as short as possible.

[0005] In addition, in order to ensure the sealing, the internal valve core of the regulating valve needs to fit very closely with other parts. This causes the internal valve core to wear due to strong friction every time the regulating valve moves, which can easily lead to problems with the sealing inside the regulating valve under long-term use. Summary of the invention

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

[0007] Based on the above purpose, the present invention provides a regulating valve equipped with an intelligent valve positioner, including a valve positioner installed on a regulating valve body, and the regulating valve also includes: A main pipe for regulating the flow of liquid, a water inlet bin is arranged at the right end of the main pipe, a water inlet bin is connected to the water inlet pipe, and a water outlet pipe is connected to the main pipe; A regulating pipe is arranged inside the main pipe, and a plurality of equally spaced water holes are arranged on the pipe wall of the regulating pipe. One end of the regulating pipe is connected to the water inlet pipe through the water inlet bin, and the other end is sealed. The water outlet pipe is connected to the cavity between the main pipe and the regulating pipe. An adjusting cylinder is slidably connected to the inside of the adjusting tube, and the two sides of the adjusting cylinder are respectively connected to the left air pressure chamber and the right air pressure chamber through the left connecting pipe and the right connecting pipe. The two air pressure chambers are filled with high-pressure gas in advance to push the adjusting cylinder to move; A locking mechanism disposed on the left connecting pipe is used to lock and fix the adjusting cylinder, and the locking mechanism is composed of a plurality of rows of equidistantly arranged positioning locks; An anti-wear sealing assembly is arranged between the regulating pipe and the regulating cylinder to prevent long-term wear from reducing the sealing performance. The anti-wear sealing assembly includes a plurality of sealing plates slidably connected to the side wall of the regulating cylinder. The sealing plates are attached to the inner side of the water hole and slidably connected to the wall of the regulating pipe.

[0008] Furthermore, the left air pressure chamber is provided with a through hole connected to the external atmosphere, and a left air outlet valve is also provided at the through hole. The right air pressure chamber is also provided with a through hole connected to the external atmosphere, and a right air outlet valve is also provided at the through hole. The left air pressure chamber is connected to the left air compressor through a pipeline, and a left air inlet valve is also provided on the pipeline. The right air pressure chamber is connected to the right air compressor through a pipeline, and a right air inlet valve is also provided on the pipeline.

[0009] Furthermore, the regulating pipe is fixedly connected inside the main pipe, the main pipe is separated from the water inlet bin by a partition, the partition is fixedly connected to the port of the regulating pipe, and a through opening with the same inner diameter as the regulating pipe is also provided at the center of the partition.

[0010] Furthermore, a left operating rod is fixedly connected to the left side of the adjusting cylinder, and a left piston plate is fixedly connected to the outer end of the left operating rod. The left piston plate is movably connected in the left connecting tube, and the inner cavity of the left connecting tube on the left side of the left piston plate is connected to the left air pressure chamber.

[0011] Furthermore, a right operating rod is provided on the right side of the adjusting cylinder, the left end of the right operating rod is located in the adjusting cylinder, and the right operating rod is slidably connected to the adjusting cylinder, the right end of the right operating rod is fixedly connected to the right piston plate, and the right piston plate is slidably connected in the right connecting tube, and the inner cavity of the right connecting tube on the right side of the right piston plate is connected to the right air pressure chamber.

[0012] Furthermore, a rubber liquid bag is provided in the regulating cylinder, the sealing plate is located outside the rubber liquid bag, a plurality of slide rails are fixedly connected to the outer wall of the regulating cylinder, the slide rails and the water holes of the regulating tube are staggered, and a slide groove cooperating with the slide rails is provided on the inner wall of the regulating tube.

[0013] Furthermore, the left end of the right operating rod is fixedly connected to a push plate, and the push plate is movably connected in the adjusting cylinder. A check mechanism is also 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, and the ratchet is engaged with the rack.

[0014] Furthermore, the positioning lock includes an electromagnetic coil fixedly connected to the left connecting tube and a block slidably connected to the left connecting tube, the inner wall of the left connecting tube is provided with a block groove extending from front to back, the block is slidably connected in the block groove, a sliding rod passes through and is slidably connected to the electromagnetic coil, the front end of the sliding rod is slidably connected to the rear end surface of the block and cannot be detached, the number of positioning locks arranged is the same as the number of water holes arranged, and the spacing between two adjacent columns of locking mechanisms is the same as the spacing between two adjacent columns of water holes.

[0015] Furthermore, a metal disk is fixedly connected to the slide rod, and a reset spring is sleeved on the slide rod between the metal disk and the electromagnetic coil, and two ends of the reset spring are respectively connected to the metal disk and the electromagnetic coil.

[0016] Furthermore, a buffer block is provided in the block groove, and a buffer groove is also provided in the left connecting tube. 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, and 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.

[0017] The beneficial effects of the present invention are as follows: 1. By equipping the regulating valve with an intelligent valve positioner, the reaction time of the regulating valve can be greatly shortened, and a left air pressure chamber and a right air pressure chamber are arranged on both sides of the main body of the regulating valve, and the left air pressure chamber and the right air pressure chamber are filled with high-pressure gas in advance. After the intelligent valve positioner receives a signal and opens the positioning lock, the high-pressure gas can immediately push the regulating cylinder to move, thereby realizing the regulation of the medium flow rate. Not only is the response sensitive, but the regulation action is also very fast, which can greatly shorten the entire regulation process.

[0018] 2. There are several rows of water holes arranged at equal distances on the wall of the regulating tube. Each row of water holes released by the regulating tube is equivalent to amplifying the medium flow rate by one level. The number of rows of water holes can be set in advance to set the number of levels of medium flow regulation. By setting the number of columns of positioning locks corresponding to the level, when the flow rate of the corresponding level needs to be adjusted, it is only necessary to control the opening and closing of the positioning locks of the corresponding position and number at the same time, which not only makes the adjustment faster, but also makes the adjustment result very accurate.

[0019] 3. A return spring is set inside the metal plate. When the electromagnetic coil is not energized, it can drive the block to extend to block the left piston plate, limit the movement of the left piston plate, and then limit the movement of the regulating cylinder. At the same time, electromagnetic valves with similar principles are also set at the inlet and outlet of the left and right air pressure chambers. When the power is cut off and the air is cut off, the left and right air pressure chambers can remain full of air to limit the movement of the regulating cylinder. Therefore, this solution can keep the valve position at the previous moment in unexpected situations such as power outage, air outage or signal cutoff to avoid confusion.

[0020] 4. An anti-wear sealing component is set between the regulating tube and the regulating cylinder. The water hole is blocked by setting a movable blocking plate. A rubber liquid bag is set inside the blocking plate. The rubber liquid bag supports the blocking plate outward. Therefore, even if the blocking plate and the inner wall of the regulating tube are worn, it can ensure that the outer side of the blocking plate is always tightly fitted on the inner wall of the regulating tube to ensure sealing. At the same time, a check mechanism is set so that the right operating lever can only squeeze the rubber liquid bag inward through the push plate to ensure that the rubber liquid bag can always maintain sufficient outward support force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention from the left side perspective.

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention from the right side perspective.

[0024] Figure 3 It is a structural schematic diagram of the valve body in the device of the present invention.

[0025] Figure 4 It is a schematic diagram of the internal structure of the main pipe in the device of the present invention.

[0026] Figure 5 It is a schematic diagram of the connection structure of the regulating tube and the regulating cylinder in the device of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the regulating cylinder in the device of the present invention.

[0028] Figure 7 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 8 for Figure 7 Enlarged view of part A.

[0030] Fig. 9 It is a schematic diagram of the internal structure of the regulating cylinder in the device of the present invention.

[0031] Fig.10 for Fig. 9 Magnified view of part B.

[0032] Fig.11 The figure is a schematic diagram of the internal principle of the valve positioner in the device of the present invention.

[0033] The markings in the figure are: 101. Valve positioner, 102. Main pipe, 103. Water inlet tank, 104. Water inlet pipe, 105. Water outlet pipe, 106. Left connecting pipe, 107. Left air pressure tank, 108. Locking mechanism, 109. Left air inlet valve, 110. Left air outlet valve, 111. Right connecting pipe, 112. Right air pressure tank, 113. Right air inlet valve, 114. Right air outlet valve, 115. Partition, 116. Adjusting pipe, 117. Water hole, 118. Adjusting cylinder, 119. Left operating lever, 120. Right operating lever , 121, left piston plate, 122, right piston plate, 123, positioning lock, 124, left air pump, 125, right air pump, 126, electromagnetic coil, 127, slide rod, 128, metal plate, 129, return spring, 130, block groove, 131, block, 132, buffer groove, 133, buffer block, 134, buffer spring, 135, slide rail, 136, blocking plate, 137, slide groove, 138, rubber liquid capsule, 139, push plate, 140, rack, 141, ratchet. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] A first aspect of the present invention, as Figure 1 , Figure 2 and Figure 7As shown, in order to shorten the total time for the regulating valve to complete the regulation as much as possible, a two-pronged approach is needed, and improvements are made in both reaction time and action time. Among them, in order to shorten the action time of the regulating valve, the main body of the regulating valve is first set to a main pipe 102 plus a water inlet tank 103, the water inlet tank 103 is connected to the right end of the main pipe 102, the water inlet tank 103 is connected to the water inlet pipe 104, and the main pipe 102 is connected to the water outlet pipe 105. The main pipe 102 is fixedly connected to the inside of the main pipe 102, and the main pipe 102 is separated from the water inlet tank 103 by a partition 115, and 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 also provided at the center of the partition 115.

[0037] The structural principle of the liquid flow regulating mechanism is as follows Figure 4 , Figure 5 and Figure 6 As shown, the wall of the regulating pipe 116 is provided with a plurality of rows of equally spaced water holes 117, and the regulating tube 118 is slidably connected inside the regulating pipe 116. One end of the regulating pipe 116 is connected to the water inlet pipe 104 through the water inlet tank 103, and the other end is always blocked by the regulating tube 118, so it is equivalent to being sealed. The outside of the water hole 117 is the cavity between the main pipe 102 and the regulating pipe 116, and the water outlet pipe 105 is connected to the cavity between the main pipe 102 and the regulating pipe 116.

[0038] Therefore, by controlling the position change of the regulating cylinder 118, the number of columns of the water holes 117 can be controlled. Each time the regulating cylinder 118 releases a column of water holes 117, the medium flow rate is amplified by one level, thereby achieving the regulation of the liquid flow rate. In addition, the number of columns of the water holes 117 can be set in advance to set the number of levels of medium flow regulation.

[0039] The driving force for the position change of the regulating cylinder 118 is driven by the high-pressure gas in the left pressure chamber 107 and the right pressure chamber 112. The two sides of the regulating cylinder 118 are connected to the left pressure chamber 107 and the right pressure chamber 112 through the left connecting pipe 106 and the right connecting pipe 111 respectively. The two pressure chambers are filled with high-pressure gas in advance to drive the regulating cylinder 118 to move.

[0040] In addition, if Figure 7 As shown, a locking mechanism 108 is provided on the left connecting pipe 106 for locking and fixing the adjusting cylinder 118. The locking mechanism 108 is composed of a plurality of equally spaced rows of positioning locks 123. The number of the positioning locks 123 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.

[0041] Therefore, by setting the corresponding number of columns of positioning locks 123, when the corresponding number of flow rates needs to be adjusted, it is only necessary to simultaneously control the opening and closing of the corresponding positions and numbers of positioning locks 123, so that the corresponding number of columns of water holes 117 can be controlled to be released, thereby controlling the number of liquid flow rates, which not only makes the adjustment faster, but also makes the adjustment results very accurate.

[0042] In order to shorten the response time of the regulating valve, an intelligent valve positioner 101 is installed on the regulating valve body. The intelligent valve positioner 101 includes a CPU, an air pressure sensor, a power module and a solenoid valve drive module, which can not only greatly shorten the response time of the regulating valve, but also has an insurance function in unexpected situations.

[0043] A second aspect of the present invention, as Figure 7 , Figure 8 and Fig. 9 As shown, in order to shorten the response time of the regulating valve, air pressure sensors are installed in the left air pressure chamber 107 and the right air pressure chamber 112, and 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 the 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 the through hole. The left air pressure chamber 107 is connected to the left air compressor 124 through a pipeline, and a left air inlet valve 109 is also provided on the pipeline. In addition, the right air pressure chamber 112 is connected to the right air compressor 125 through a pipeline, and a right air inlet valve 113 is also provided on the pipeline.

[0044] The intelligent valve positioner 101 includes a CPU, an air pressure sensor, a power module and a solenoid valve driving module. The air pressure sensor and the power module are connected to the input side of the CPU, and the output side of the CPU is connected to 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 electromagnetic coil 126 in 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 is also provided between the air pressure sensor, the power module and the CPU, and the power module can use a DC power supply with a rated voltage of 24V or an AC power supply with an effective voltage of 220V.

[0045] By equipping the regulating valve with an intelligent valve positioner, the reaction time of the regulating valve can be greatly shortened, and a left air pressure chamber 107 and a right air pressure chamber 112 are set on both sides of the main body 102 in the regulating valve. By filling the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas in advance, after the intelligent valve positioner receives the signal and opens the positioning lock 123, the high-pressure gas can immediately push the regulating cylinder 118 to move, thereby achieving the adjustment of the medium flow rate. It is not only sensitive to reaction, but also very quick in adjustment action, which can greatly shorten the entire adjustment process.

[0046] A third aspect of the present invention is as follows Figure 3 , Figure 7 and Figure 8 As shown, a left operating rod 119 is fixedly connected to the left side of the adjusting cylinder 118, and a left piston plate 121 is fixedly connected to the outer end of the left operating rod 119. The left piston plate 121 is movably connected to 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 communicated with the left air pressure chamber 107. A right operating rod 120 is arranged on the right side of the adjusting cylinder 118, and the outer end of the right operating rod 120 is fixedly connected to the right piston plate 122, and the right piston plate 122 is movably connected to the right connecting tube 111, and the inner cavity of the right connecting tube 111 on the right side of the right piston plate 122 is communicated with the right air pressure chamber 112.

[0047] The positioning lock 123 includes an electromagnetic coil 126 fixedly connected to the left connecting tube 106 and a block 131 slidably connected in the left connecting tube 106. A block groove 130 extending from front to back is provided in the inner wall of the left connecting tube 106. The block 131 is slidably connected in 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.

[0048] In addition, a metal disk 128 is fixedly connected to the slide rod 127 , and a return spring 129 is sleeved on the slide rod 127 between the metal disk 128 and the electromagnetic coil 126 , and two ends of the return spring 129 are respectively connected to the metal disk 128 and the electromagnetic coil 126 .

[0049] Therefore, when the electromagnetic coil 126 is not energized, the block 131 extends forward to block the left piston plate 121, limiting the movement of the left piston plate 121, and further limiting the movement of the regulating cylinder 118. When it is necessary to control the movement of the regulating cylinder 118 to adjust the liquid flow rate. It is only necessary to control the electromagnetic coil 126 in the corresponding position and number of the positioning locks 123 to be energized, and the metal disk 128 will be adsorbed and retracted into the block 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 regulating cylinder 118 will move to the left or right, thereby releasing more water holes 117 or blocking more water holes 117, thereby achieving the regulation of the liquid flow rate.

[0050] It is particularly important to note that only one of the high-pressure gas in the left pressure chamber 107 or the right pressure chamber 112 will be effective at the same time. When the high-pressure gas in one of the pressure chambers is effective, the outlet valve in the other pressure chamber will be opened immediately to avoid interference.

[0051] In addition, a buffer block 133 is provided in the block groove 130, and a buffer groove 132 is also provided in the left connecting tube 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 block 131. A buffer spring 134 is also provided in the buffer groove 132, and 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.

[0052] Therefore, the left piston plate 121 moves rapidly under the action of high-pressure gas and finally hits the next unretracted block 131. However, with the effect of the buffer block 133 and the buffer spring 134, the impact caused by the collision can be greatly reduced, thereby improving the service life of the device.

[0053] A fourth aspect of the present invention, as Figure 4 , Figure 5 , Figure 7 , Fig. 9 and Fig.10 As shown, an anti-wear sealing assembly is provided 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 includes a plurality of sealing plates 136 slidably connected to the side wall of the regulating cylinder 118. The sealing plates 136 are attached to the inner side of the water hole 117 and are slidably connected to the wall of the regulating tube 116.

[0054] Specifically, a rubber liquid bag 138 is also provided in the regulating cylinder 118, and the sealing plate 136 is located outside the rubber liquid bag 138. A plurality of slide rails 135 are fixedly connected to the outer wall of the regulating cylinder 118. The slide rails 135 and the water holes 117 of the regulating tube 116 are staggered. A slide groove 137 cooperating with the slide rails 135 is provided on the inner wall of the regulating tube 116.

[0055] The left end of the right operating rod 120 is fixedly connected to a push plate 139, which is movably connected to the adjusting cylinder 118. A non-return mechanism is also provided at the connection between the right operating rod 120 and the adjusting cylinder 118. The non-return 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, and the ratchet 141 is engaged with the rack 140.

[0056] The water hole 117 is blocked by setting a movable blocking plate 136, and a rubber sac 138 is set inside the blocking plate 136. The rubber sac 138 supports the blocking plate 136 outward, so even if the blocking plate 136 and the inner wall of the regulating tube 116 are worn, the outer side of the blocking plate 136 can always be closely attached to the inner wall of the regulating tube 116 to ensure the sealing. At the same time, a check mechanism is set so that the right operating rod 120 can only press the rubber sac 138 inward through the push plate 139, ensuring that the rubber sac 138 can always maintain sufficient outward support force.

[0057] Embodiment: Assume that the flow rate of opening 4 rows of water holes 117 is adjusted to the flow rate of opening 10 rows of water holes 117.

[0058] Therefore, before adjustment, the left piston plate 121 is located between the 4th and 5th column positioning locks 123, that is, between the 4th and 5th column stoppers 131, and is stuck by the two. After the intelligent valve positioner 101 receives the adjustment signal, the electromagnetic coils 126 in the 5th to 10th column positioning locks 123 are all energized, and after the electromagnetic coils 126 are energized, the metal disc 128 is adsorbed and retracted, and retracts into the stopper groove 130 with the stopper 131 through the slide rod 127.

[0059] At the same time, the left air outlet valve 110 on the left air pressure chamber 107 opens, 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 is effective, pushing the right piston plate 122 to move to the left, and then moving the regulating cylinder 118 and the left piston plate 121 to the left together, until the left piston plate 121 rests on the stop block 131 in the positioning lock 123 of the 11th column.

[0060] Subsequently, all the electromagnetic coils 126 are de-energized again. When the electromagnetic coils 126 are not energized, all the blocks 131 extend forward to block the left piston plate 121, limiting the movement of the left piston plate 121. At this time, the left piston plate 121 is stuck between the 10th and 11th columns of blocks 131, so the regulating cylinder 118 releases the 10th columns of water holes 117 to achieve the predetermined flow regulation. The whole process is fast and sensitive.

[0061] The same is true when the flow rate needs to be reduced. The electromagnetic coil 126 in the corresponding position and number of positioning locks 123 is energized, and the metal disk 128 will be adsorbed and retracted into the block groove 130.

[0062] At this time, the left piston plate 121 is released, and 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 is effective, pushing the left piston plate 121 to move to the right, thereby causing the regulating cylinder 118 to block more rows of water holes 117, thereby reducing the flow rate.

[0063] After the flow rate adjustment is completed, all electromagnetic coils 126 are powered off. When the electromagnetic coils 126 are not powered, all the blocks 131 extend forward to block the left piston plate 121, limiting the movement of the left piston plate 121. The left outlet valve 110 and the right outlet valve 114 are closed. After closing, the left intake valve 109 and the right intake valve 113 are opened, and the left air pump 124 and the right air pump 125 refill the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas for next use.

[0064] In summary, the present invention can greatly shorten the response time of the regulating valve by equipping the regulating valve with an intelligent valve positioner, and set the left air pressure chamber 107 and the right air pressure chamber 112 on both sides of the main pipe 102 in the regulating valve. By filling the left air pressure chamber 107 and the right air pressure chamber 112 with high-pressure gas in advance, after the intelligent valve positioner receives the signal and opens the positioning lock 123, the high-pressure gas can immediately push the regulating cylinder 118 to move, thereby adjusting the medium flow rate. It is not only sensitive to the reaction, but also very fast in the adjustment action, which can greatly shorten the entire adjustment process. In addition, a plurality of rows of equidistantly arranged water holes 117 are provided on the wall of the regulating pipe 116. Each time the regulating cylinder 118 releases a row of water holes 117, it is equivalent to amplifying the medium flow rate by one level. The number of rows of water holes 117 can be set in advance to set the number of levels of medium flow regulation. By setting the number of columns of the positioning locks 123 of the corresponding level, when the flow of the corresponding level needs to be adjusted, it is only necessary to control the opening and closing of the positioning locks 123 of the corresponding position and number at the same time, which not only makes the adjustment faster, but also makes the adjustment result very accurate. A reset spring 129 is set on the inner side of the metal plate 128, which can drive the block 131 to extend when the electromagnetic coil 126 is not energized, thereby blocking the left piston plate 121, limiting the movement of the left piston plate 121, and then limiting the movement of the regulating cylinder 118. At the same time, electromagnetic valves with similar principles are also set at the inlet and outlet of the left air pressure chamber 107 and the right air pressure chamber 112. When the power is cut off and the gas is cut off, the left air pressure chamber 107 and the right air pressure chamber 112 can remain in a state of being filled with gas, limiting the movement of the regulating cylinder 118. Therefore, this solution can keep the position of the valve at the previous moment in unexpected situations such as power off, gas off or signal off, avoiding confusion.

[0065] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples; within the context of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0066] 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 omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection 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 comprises a plurality of sealing plates (136) slidably connected to the side wall of the regulating cylinder (118). The sealing plates (136) are attached to the inner side of the water through hole (117) and are slidably connected to the tube wall of the regulating tube (116).

2. A regulating valve equipped with an intelligent valve positioner according to claim 1, characterized in that: The left air pressure chamber (107) is provided with a through hole communicating with the external 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 external atmosphere, and a right air outlet valve (114) is also provided at the through hole. The left air pressure chamber (107) is connected to a left air compressor (124) via a pipeline, and a left air inlet valve (109) is also provided on the pipeline. The right air pressure chamber (112) is connected to a right air compressor (125) via a pipeline, and a right air inlet valve (113) is also provided on the pipeline.

3. The 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).

4. A regulating valve equipped with an intelligent valve positioner according to claim 1 or 2, 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).

5. A regulating valve equipped with an intelligent valve positioner according to claim 1 or 2, 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).

6. The regulating valve equipped with an intelligent valve positioner according to claim 5, characterized in that: 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).

7. The regulating valve equipped with an intelligent valve positioner according to claim 6, 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).

8. The regulating valve equipped with an intelligent valve positioner according to claim 4, characterized in that: 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).

9. The regulating valve equipped with an intelligent valve positioner according to claim 8, 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).

10. The regulating valve equipped with an intelligent valve positioner according to claim 8, 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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