A pressure reducing regulating valve with flow limiting and buffering function

Abstract

The present invention discloses a pressure reducing regulating valve with a flow limiting and buffering function, which specifically relates to the field of natural gas transportation technology, including a connecting pipe mouth, a first pressure reducing spring and an electromagnetic flowmeter, wherein the outside of the connecting pipe mouth is connected to a flow limiting mechanism, the inside of the flow limiting mechanism is provided with a first pressure reducing spring, and the outside of the connecting pipe mouth is sleeved with an electromagnetic flowmeter. The present invention provides a limiting collar, a buffer valve core, a worm gear plate and a first worm gear so that when the inflow slot is connected to transport gas, the gas pressure first extends the buffer valve core, and through the elastic expansion and contraction between the buffer valve core and the first pressure reducing spring, the gas passes through the limit between the buffer valve core and the limiting collar, which can disperse and guide the gas pressure inside the first counter-flow channel to the greatest extent, so that the pressure reducing valve can perform state-dependent regulation when the partial pressure is adjusted according to the size of the gas pressure, thereby realizing partial pressure regulation when the instantaneous flow is too large.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas transportation, and more particularly to a pressure reducing regulating valve with a flow limiting and buffering function. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a certain required outlet pressure through regulation, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction.

[0003] Natural gas refers to a mixture of hydrocarbon and non-hydrocarbon gases naturally stored in the strata. During the transportation and circulation of natural gas, it is necessary to use pressure reducing valves to reduce the pressure of the natural gas during transportation.

[0004] For example, Chinese patent application number CN112392979B discloses a high-pressure differential pressure-reducing regulating valve comprising a bonnet, a valve stem assembly, a packing plate, a connected valve body, and a flange. A cage is disposed within the inner cavity of the valve body and communicates with the inlet and outlet of the valve body, respectively. The valve stem assembly comprises a connected valve stem and a valve core body, with the valve core body end of the valve stem assembly housed within the cage. The bonnet is sleeved around the periphery of the valve stem and connected to the valve body. The packing plate is sleeved around the periphery of the valve stem and connected to the bonnet. Packing is filled between the bonnet and the valve stem. The valve stem is connected to an actuator. The valve core body is provided with at least two outwardly protruding pressure relief zones, each of which is provided with a pressure relief groove, in sequence from top to bottom. To address the above-mentioned problems, the present invention provides a high-pressure differential pressure-reducing regulating valve. After passing through the valve body, high-pressure medium undergoes multi-stage pressure reduction and flows into the valve body outlet. The flow out of the valve body can meet the user's low-pressure minimum flow requirement, thereby achieving higher control accuracy.

[0005] The above-mentioned pressure reducing regulating valve realizes pressure reduction through a porous throttling ring during pressure reduction. However, during gas transportation, when the gas pressure is quickly loaded at the inlet of the pressure reducing regulating valve, there will be a large instantaneous overshoot at the outlet of the pressure reducing regulating valve. At this time, it is easy to cause the instantaneous flow rate to be too large during pressure reduction, resulting in excessive instantaneous pressure shock, affecting the instantaneous pressure bearing capacity of the pressure reducing valve. Moreover, when the existing pressure reducing valve is fully loaded during long-term high-pressure transportation, it is often impossible to effectively balance the pressure and reduce the pressure, making it impossible for the pressure reducing valve to perform a fully and effectively pressure reducing operation under high negative pressure conditions, affecting the uniform flow limiting and buffering of the pressure reducing valve during pressure reduction. Therefore, it is of great significance to study a pressure reducing regulating valve with a flow limiting and buffering function to solve the above-mentioned problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pressure-reducing regulating valve with a flow limiting and buffering function. The technical problem to be solved by the present invention is: the existing pressure-reducing regulating valve achieves pressure reduction through a porous throttling ring when reducing pressure, but when transporting gas, when the gas pressure is quickly loaded at the inlet of the pressure-reducing regulating valve, the outlet of the pressure-reducing regulating valve will have a large instantaneous overshoot, which can easily cause the instantaneous flow rate to be too large during pressure reduction, resulting in excessive instantaneous pressure shock, affecting the instantaneous pressure-bearing capacity of the pressure-reducing valve, and when the existing pressure-reducing valve is fully loaded during long-term high-pressure transportation, it is often impossible to effectively balance the pressure and reduce the pressure, so that the pressure-reducing valve cannot perform a fully and effectively pressure-reducing operation under high negative pressure, affecting the uniform flow limiting and buffering of the pressure-reducing valve during pressure reduction.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a pressure-reducing regulating valve with a flow-limiting and buffering function, comprising a connecting pipe orifice, a first pressure-reducing spring, and an electromagnetic flowmeter, wherein the outside of the connecting pipe orifice is connected to a flow-limiting mechanism, the interior of the flow-limiting mechanism is provided with a first pressure-reducing spring, the outside of the connecting pipe orifice is sleeved with an electromagnetic flowmeter, the interior of the flow-limiting mechanism is provided with a regulating mechanism, the interior of the flow-limiting mechanism is installed with a rotating circulation mechanism, the interior of the flow-limiting mechanism is provided with a pressure relief mechanism, the bottom end of the regulating mechanism is connected to a guide mechanism, the top end of the regulating mechanism is fixedly connected to the bottom end of the first pressure-reducing spring, and the detection end of the electromagnetic flowmeter is inserted into the interior of the flow-limiting mechanism;

[0008] The regulating mechanism includes a limiting collar, a buffer valve core, a worm gear plate, a first worm gear, a first worm and a connecting guide rod and a second worm gear, the limiting collar is fixedly connected to the inner side wall of the flow limiting mechanism, the buffer valve core is inserted into the limiting collar, the worm gear plate is fixedly connected to the outer side wall of the buffer valve core, the first worm gear is installed on the outer side wall of the limiting collar through a movable seat, the first worm gear is meshed with the outside of the first worm gear, the connecting guide rod is connected to the bottom end of the first worm gear, the second worm gear is meshed with the outer side wall of the connecting guide rod, the outer surface of the connecting guide rod is a metal steel pipe with a smooth structure, the first worm gear is rotatably connected on the outside of the limiting collar, there is sliding friction between the buffer valve core and the limiting collar, and the buffer valve core is slidably connected inside the limiting collar, and the first worm gear and the second worm gear are both arranged on the inner side wall of the bottom end of the flow limiting mechanism through a connecting plate seat;

[0009] The flow limiting mechanism includes an inlet slot, an annular groove, a first counter-flow channel, a second counter-flow channel, an outlet flow channel and an outer shell plate cover. The outer shell plate cover is sleeved on the outside of the connecting pipe mouth, the inlet slot is opened inside the outer shell plate cover, the annular groove is opened on one side of the inlet slot, the first counter-flow channel is opened at the bottom end of the inlet slot, the second counter-flow channel is opened at one side end of the outer shell plate cover, and the outlet flow channel is opened on the right side of the outer shell plate cover.

[0010] As a further solution of the present invention: the annular groove and the outflow channel are connected through a regulating mechanism, the first counter-flow channel is horizontally opened at the bottom end of the outer shell plate cover, the first counter-flow channel and the liquid outlet of the second counter-flow channel are perpendicular, and one side of the second counter-flow channel is connected to the interior of the pressure relief mechanism.

[0011] As a further solution of the present invention: the rotating circulation mechanism includes a rotating disc seat, a seepage hole groove and a reset telescopic spring, the rotating disc seat is fixedly connected to the top of the second worm, the top outer surface of the rotating disc seat is provided with a seepage hole groove, the top of the rotating disc seat is fixedly connected to the reset telescopic spring, the top of the rotating disc seat is installed with a rotating seat, the interior of the rotating seat is inserted with a ball, the top of the rotating seat and the reset telescopic spring are both fixedly connected with a seepage limiting plate.

[0012] As a further solution of the present invention: a seepage hole groove is provided on the outer surface of the seepage limiting plate, and the size and position of the seepage hole grooves provided on the seepage limiting plate and the rotating disk seat correspond one to one, the reset telescopic spring is fixedly installed on the bottom end of the seepage limiting plate and the top outer wall of the rotating disk seat by screws, the seepage limiting plate is rotatably connected to the rotating disk seat through the rotating seat, and the seepage limiting plate is elastically rotatably connected to the reset telescopic spring.

[0013] As a further solution of the present invention: the pressure relief mechanism includes a guide plate, a pressure relief telescopic plate and a connecting seat, the guide plate is arranged on the inner side wall of the flow limiting mechanism, the pressure relief telescopic plate is inserted into the inside of the guide plate, the top end of the pressure relief telescopic plate is fixedly connected to the connecting seat, and the outside of the connecting seat is provided with a second pressure relief spring.

[0014] As a further solution of the present invention: the pressure relief telescopic plate is connected to the outside of the second pressure relief spring through a connecting seat, and the pressure relief telescopic plate is elastically telescopically connected to the second pressure relief spring, and the inner side of the pressure relief telescopic plate is connected to the second counter-flow channel.

[0015] As a further solution of the present invention: the guide mechanism includes a worm guide wheel, a rotating bearing seat and a second worm wheel, the worm guide wheel is fixedly connected to the bottom end of the first worm, the bottom end of the worm guide wheel is connected to the rotating bearing seat, and the outer surface of the worm guide wheel is engaged with the second worm wheel.

[0016] As a further solution of the present invention: the second worm gear is sleeved on the outside of the connecting guide rod, and two second worm gears are sleeved on both sides of the outside of the connecting guide rod, and the worm guide wheel is rotatably connected inside the rotating bearing seat.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention provides a limiting collar, a buffer valve core, a worm gear plate and a first worm gear so that when the inflow slot is connected to transport gas, the gas pressure first extends the buffer valve core, and through the elastic expansion and contraction between the buffer valve core and the first pressure reducing spring, the gas passes through the limit between the buffer valve core and the limiting collar and is decelerated. After the buffer valve core is extended, when the air pressure circulates, the worm gear plate is meshed with the first worm gear, driving the first worm gear to rotate, so that the first worm gear is meshed with the first worm gear, driving the rotation control of the first worm gear, and then the bottom end of the first worm gear is connected through the guide mechanism to make the second worm gear rotate The cam is rotated to move the valve stem and the cam is moved to the left of the valve stem, and the cam is moved to the right of the valve stem, so that the cam is moved to the right of the valve stem. When the cam is in the air, the cam is moved to the right of the valve stem, and the cam is moved to the right of the valve stem. When the cam is in the air, the cam is moved to the right of the valve stem. When the cam is in the air, the cam is moved to the right of the valve stem. When the cam is in the air, the cam is moved to the right of the valve stem.

[0019] 2. The present invention provides a guide plate, a pressure relief telescopic plate, a connecting seat and a second pressure relief spring so that when the instantaneous pressure is too large or the pressure is too large for a long time, the buffer valve core is at the extreme value of the top extension state. At this time, after the gas is initially decompressed by the limit between the limit collar and the buffer valve core, the gas is still circulated at a high pressure because the pressure regulation restriction is too low. At this time, after the gas after the initial pressure regulation flows into the interior of the outflow channel, due to the excessive pressure, the gas pushes the pressure relief telescopic plate inwardly, so that the connecting seat can control the inward expansion and contraction adjustment of the pressure relief telescopic plate after the elastic expansion and contraction of the second pressure relief spring, so that the gas outflowing the flow channel can be secondary decompressed by the setting of the pressure relief mechanism, and the decompressed gas is discharged through the second counter-flow channel, so as to achieve safe pressure relief of the gas during pressure reduction, so that the gas stream makes several right-angle turns and pressure reduction adjustments respectively, so as to enter the next group of throttling channels after multi-stage pressure reduction, perform flow limiting and buffering operations during pressure reduction, and reduce the flow rate of the airflow;

[0020] 3. The present invention provides a pressure relief mechanism, a regulating mechanism, a rotating circulation mechanism and a guiding mechanism so that when the airflow pressure is transported under a continuous high-pressure state, first a part of the airflow can be slowed down by the setting of the regulating mechanism, and then another part of the airflow can be slowed down by the setting of the pressure relief mechanism. The output ports of the second counter-flow channel and the first counter-flow channel are both vertically arranged inside the outflow channel. The two streams collide and merge and then flow into the throttling channel of the outflow channel. At this time, the two groups of thin streams of gas can be output inside the outflow channel and the airflow directly circulating inside the outflow channel for three-way offset, and finally transported after converging, thereby reducing the high flow rate of the gas in the outflow channel, effectively reducing the excessive instantaneous flow caused by short-term high negative pressure, and affecting the flow limiting and buffering capacity of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the middle current limiting mechanism;

[0023] Figure 3 For the present invention Figure 1 Schematic diagram of the partial structure of the middle current limiting mechanism;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the overall structure of the regulatory agency;

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the overall structure of the rotating circulation mechanism;

[0026] Figure 6 For the present invention Figure 2 A schematic diagram of the structure at center A;

[0027] Figure 7 For the present invention Figure 4 A magnified schematic diagram of the structure at point B.

[0028] In the figure: 1. Connecting pipe; 2. Flow limiting mechanism; 201. Inflow notch; 202. Annular groove; 203. First counterflow channel; 204. Second counterflow channel; 205. Outflow channel; 206. Housing plate cover; 3. First pressure relief spring; 4. Electromagnetic flowmeter; 5. Control mechanism; 501. Limiting collar; 502. Buffer valve core; 503. Worm gear plate; 504. First worm gear; 505. First worm; 506. Connecting guide rod; 507, second worm; 6, rotating circulation mechanism; 601, rotating disc seat; 602, seepage hole groove; 603, reset telescopic spring; 604, rotating seat; 605, seepage limit plate; 7, pressure relief mechanism; 701, guide plate; 702, pressure relief telescopic plate; 703, connecting seat; 704, second pressure relief spring; 8, guiding mechanism; 801, worm guide wheel; 802, rotating bearing seat; 803, second worm gear. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-7 As shown, the present invention provides a pressure-reducing regulating valve with a flow-limiting and buffering function, comprising a connecting pipe nozzle 1, a first pressure-reducing spring 3, and an electromagnetic flowmeter 4. The outside of the connecting pipe nozzle 1 is connected to a flow-limiting mechanism 2, the interior of the flow-limiting mechanism 2 is provided with a first pressure-reducing spring 3, the outside of the connecting pipe nozzle 1 is sleeved with an electromagnetic flowmeter 4, the interior of the flow-limiting mechanism 2 is provided with a regulating mechanism 5, the interior of the flow-limiting mechanism 2 is installed with a rotating circulation mechanism 6, the interior of the flow-limiting mechanism 2 is provided with a pressure relief mechanism 7, the bottom end of the regulating mechanism 5 is connected to a guide mechanism 8, the top end of the regulating mechanism 5 is fixedly connected to the bottom end of the first pressure-reducing spring 3, and the detection end of the electromagnetic flowmeter 4 is inserted into the interior of the flow-limiting mechanism 2;

[0031] The regulating mechanism 5 includes a limiting collar 501, a buffer valve core 502, a worm gear plate 503, a first worm wheel 504, a first worm 505 and a connecting guide rod 506 and a second worm 507. The limiting collar 501 is fixedly connected to the inner wall of the flow limiting mechanism 2, the buffer valve core 502 is inserted into the inside of the limiting collar 501, the worm gear plate 503 is fixedly connected to the outer wall of the buffer valve core 502, the first worm wheel 504 is installed on the outer wall of the limiting collar 501 through a movable seat, and the first worm 505 is engaged with the first worm wheel 504. Externally, a connecting guide rod 506 is connected to the bottom end of the first worm 505, and a second worm 507 is engaged with the outer side wall of the connecting guide rod 506. The outer surface of the connecting guide rod 506 is a smooth metal steel tube. The first worm gear 504 is rotatably connected to the outside of the limiting collar 501. There is sliding friction between the buffer valve core 502 and the limiting collar 501, and the buffer valve core 502 is slidably connected to the inside of the limiting collar 501. The first worm 505 and the second worm 507 are both arranged on the inner side wall of the bottom end of the flow limiting mechanism 2 through a connecting plate seat.

[0032] The flow limiting mechanism 2 includes an inflow slot 201, an annular groove 202, a first counter-flow channel 203, a second counter-flow channel 204, an outflow channel 205 and an outer shell cover 206. The outer shell cover 206 is sleeved on the outside of the connecting pipe mouth 1, the inflow slot 201 is opened inside the outer shell cover 206, the annular groove 202 is opened on one side of the inflow slot 201, the first counter-flow channel 203 is opened at the bottom end of the inflow slot 201, the second counter-flow channel 204 is opened at one end of the outer shell cover 206, the outflow channel 205 is opened on the right side of the outer shell cover 206, the annular groove 202 and the outflow channel 205 are connected through the regulating mechanism 5, the first counter-flow channel 203 is opened horizontally at the bottom end of the outer shell cover 206, the first counter-flow channel 203 is opened horizontally at the bottom end of the outer shell cover 206, and the second counter-flow channel 204 is opened at the end of one side of the outer shell cover 206. The flushing channel 203 is perpendicular to the liquid outlet of the second flushing channel 204. One side of the second flushing channel 204 is connected to the inside of the pressure relief mechanism 7. When the buffer valve core 502 is extended, it is engaged with the first worm gear 504 through the worm gear plate 503, so that after the first worm gear 504 rotates, it can engage and rotate the first worm 505, thereby controlling the first worm 505 to rotate. After the rotation, the second worm 507 can be controlled to rotate through the guidance of the guide mechanism 8, and then the rotating disc seat 601 connected to the top of the second worm 507 can be rotated, and the gas flowing inside the first flushing channel 203 is diverted and pressure relieved. The model of the electromagnetic flowmeter 4 is LDT125-250.

[0033] like Figure 2As shown, the annular groove 202 is connected to the outflow channel 205 through the regulating mechanism 5, the first counter-flow channel 203 is horizontally opened at the bottom end of the shell plate cover 206, the first counter-flow channel 203 is perpendicular to the liquid outlet of the second counter-flow channel 204, and one side of the second counter-flow channel 204 is connected to the inside of the pressure relief mechanism 7, and the outer surface of the seepage limiting plate 605 is provided with a seepage hole groove 602, and the size and position of the seepage limiting plate 605 and the seepage hole groove 602 opened on the rotating disk seat 601 are all corresponding to each other, and the reset telescopic spring 603 is fixedly installed at the bottom end and On the top outer wall of the rotating disc seat 601, the seepage limiting plate 605 is rotatably connected to the rotating disc seat 601 through the rotating seat 604, and the seepage limiting plate 605 is elastically rotatably connected to the reset telescopic spring 603. After the second worm 507 rotates, it drives the rotating disc seat 601 to rotate, and performs rotational limiting operations on the seepage holes 602 on the rotating disc seat 601 and the seepage limiting plate 605. By performing corresponding limiting control on the seepage holes 602 on the rotating disc seat 601 and the seepage limiting plate 605, the gas pressure inside the first counter-flow channel 203 can be dispersed and diverted to different degrees.

[0034] like Figure 5 and Figure 7 As shown, the pressure relief mechanism 7 includes a guide plate 701, a pressure relief telescopic plate 702 and a connecting seat 703. The guide plate 701 is arranged on the inner side wall of the flow limiting mechanism 2. The guide plate 701 is inserted with a pressure relief telescopic plate 702. The top of the pressure relief telescopic plate 702 is fixedly connected to the connecting seat 703. The outer portion of the connecting seat 703 is sleeved with a second pressure relief spring 704. The pressure relief telescopic plate 702 is connected to the outside of the second pressure relief spring 704 through the connecting seat 703, and the pressure relief telescopic plate 702 is elastically telescopically connected to the second pressure relief spring 704. The inner side of the pressure relief telescopic plate 702 is connected to the second counter-flow channel 204. The guide mechanism 8 includes a worm guide wheel 801 , rotating bearing seat 802 and second worm gear 803, the worm guide wheel 801 is fixedly connected to the bottom end of the first worm 505, the bottom end of the worm guide wheel 801 is connected to the rotating bearing seat 802, the outer surface of the worm guide wheel 801 is meshed with the second worm gear 803, the second worm gear 803 is sleeved on the outside of the connecting guide rod 506, and two second worm gears 803 are sleeved on both sides of the outside of the connecting guide rod 506, the worm guide wheel 801 is rotatably connected inside the rotating bearing seat 802, and through the elastic expansion and contraction of the connecting seat 703 and the second decompression spring 704, the pressure relief expansion plate 702 can be expanded and contracted to perform gas diversion and pressure relief operations.

[0035] Working principle of the present invention:

[0036] S1. First, when the inflow slot 201 is connected and the gas is transported, the gas pressure first extends the buffer valve core 502, driving the elastic expansion and contraction between the buffer valve core 502 and the first pressure reducing spring 3, and performing deceleration control on the gas passing through the limit between the buffer valve core 502 and the limit collar 501. Then, after the buffer valve core 502 is extended, the worm gear plate 503 is meshed with the first worm gear 504, which can drive the first worm gear 504 to rotate, so that the first worm 505 can rotate after meshing with the first worm gear 504. Then, the worm guide wheel 801 at the bottom end of the first worm gear 505 rotates, driving the second worm gear 803 to rotate, and controlling the connecting guide rod. 506 performs a guide rotation operation, driving the second worm 507 to rotate, thereby controlling the rotation of the rotating disc seat 601, and performing a rotational limiting movement on the rotating disc seat 601 and the seepage hole groove 602 on the seepage limit plate 605. When the pressure is maximum and the buffer valve core 502 moves to the top, the number of rotations of the first worm 505 is the largest. Through the guidance of the guide mechanism 8, the number of rotations of the second worm 507 is the largest, thereby controlling the rotating disc seat 601 and the seepage hole groove 602 on the seepage limit plate 605 to be in a vertical corresponding state, so that the gas pressure inside the first counter-flow channel 203 can be dispersed and guided to the greatest extent, thereby facilitating the pressure control and regulation of the rotating circulation mechanism 6 during the diversion;

[0037] S2. When the gas pressure-regulated by the first pressure-reducing spring 3 flows to the inside of the outflow channel 205, the pressure inside the outflow channel 205 is too high, causing the gas to push the pressure relief telescopic plate 702 inward, driving the connecting seat 703 to elastically expand and contract with the second pressure-reducing spring 704, and controlling the inward expansion and contraction adjustment of the pressure relief telescopic plate 702, so that part of the gas inside the outflow channel 205 is subjected to a second pressure reduction through the setting of the pressure relief mechanism 7, and then the pressure-reduced gas is discharged through the second counter-flow channel 204, realizing safe pressure relief of the gas during pressure reduction. At this time, the airflows output by the first counter-flow channel 203 and the second counter-flow channel 204 collide and merge and then flow into the flow channel of the outflow channel 205, so that the two groups of thin streams of gas can be output. They can be subjected to three-way collision with the airflow directly circulating inside the outflow channel 205, and finally transported after converging, thereby reducing the flow rate of the gas in the outflow channel 205.

[0038] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0039] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pressure reducing regulating valve with a flow limiting and buffering function, comprising a connecting pipe port (1), a first pressure reducing spring (3) and an electromagnetic flowmeter (4), characterized in that: The outside of the connecting pipe mouth (1) is connected to a flow limiting mechanism (2), a first pressure reducing spring (3) is provided inside the flow limiting mechanism (2), an electromagnetic flow meter (4) is sleeved on the outside of the connecting pipe mouth (1), a regulating mechanism (5) is provided inside the flow limiting mechanism (2), a rotating circulation mechanism (6) is installed inside the flow limiting mechanism (2), a pressure relief mechanism (7) is provided inside the flow limiting mechanism (2), the bottom end of the regulating mechanism (5) is connected to a guide mechanism (8), the top end of the regulating mechanism (5) is fixedly connected to the bottom end of the first pressure reducing spring (3), and the detection end of the electromagnetic flow meter (4) is inserted into the inside of the flow limiting mechanism (2); The regulating mechanism (5) comprises a limiting collar (501), a buffer valve core (502), a worm gear plate (503), a first worm wheel (504), a first worm (505), a connecting guide rod (506) and a second worm (507), wherein the limiting collar (501) is fixedly connected to the inner wall of the flow limiting mechanism (2), the buffer valve core (502) is inserted into the limiting collar (501), the worm gear plate (503) is fixedly connected to the outer wall of the buffer valve core (502), the first worm wheel (504) is mounted on the outer wall of the limiting collar (501) through a movable seat, and the first worm (505) is meshed with the first worm wheel (504). 04), the connecting guide rod (506) is connected to the bottom end of the first worm (505), the second worm (507) is engaged with the outer wall of the connecting guide rod (506), the outer surface of the connecting guide rod (506) is a metal steel pipe with a smooth structure, the first worm wheel (504) is rotatably connected to the outside of the limiting ring (501), there is sliding friction between the buffer valve core (502) and the limiting ring (501), and the buffer valve core (502) is slidably connected inside the limiting ring (501), and the first worm (505) and the second worm (507) are both arranged on the inner wall of the bottom end of the flow limiting mechanism (2) through a connecting plate seat; The flow limiting mechanism (2) comprises an inflow notch (201), an annular groove (202), a first counter-flow channel (203), a second counter-flow channel (204), an outflow channel (205) and an outer shell cover (206), wherein the outer shell cover (206) is sleeved on the outside of the connecting pipe mouth (1), the inflow notch (201) is provided inside the outer shell cover (206), the annular groove (202) is provided on one side of the inflow notch (201), the first counter-flow channel (203) is provided on the inflow notch, and the second counter-flow channel (204) is provided on the outer shell cover (206). (201), the second counter-flow channel (204) is opened at one side end of the outer shell plate cover (206), the outflow channel (205) is opened on the right side of the outer shell plate cover (206), the annular groove (202) and the outflow channel (205) are connected through the regulating mechanism (5), the guide mechanism (8) is connected to the rotating circulation mechanism (6), and the regulating mechanism (5) realizes the dispersed diversion of the first counter-flow channel (203) through the guide mechanism (8) and the rotating circulation mechanism (6).

2. The pressure reducing regulating valve with flow limiting and buffering function according to claim 1, characterized in that: The first counter-flow channel (203) is horizontally opened at the bottom end of the outer shell plate cover (206), the first counter-flow channel (203) and the liquid outlet of the second counter-flow channel (204) are perpendicular to each other, and one side of the second counter-flow channel (204) is connected to the interior of the pressure relief mechanism (7).

3. The pressure reducing regulating valve with flow limiting and buffering function according to claim 1, characterized in that: The rotating circulation mechanism (6) includes a rotating disc seat (601), a seepage hole groove (602) and a reset telescopic spring (603), wherein the rotating disc seat (601) is fixedly connected to the top end of the second worm (507), and the outer surface of the top end of the rotating disc seat (601) is provided with a seepage hole groove (602), and the top end of the rotating disc seat (601) is fixedly connected to the reset telescopic spring (603), and the top end of the rotating disc seat (601) is installed with a rotating seat (604), and a ball is inserted into the interior of the rotating seat (604), and the top ends of the rotating seat (604) and the reset telescopic spring (603) are both fixedly connected to a seepage limit plate (605).

4. The pressure reducing regulating valve with flow limiting and buffering function according to claim 3, characterized in that: The outer surface of the seepage limiting plate (605) is provided with a seepage hole groove (602), and the size and position of the seepage limiting plate (605) and the seepage hole groove (602) provided on the rotating disk seat (601) are all corresponding to each other. The reset telescopic spring (603) is fixedly mounted on the bottom end of the seepage limiting plate (605) and the top outer wall of the rotating disk seat (601) by screws. The seepage limiting plate (605) is rotatably connected to the rotating disk seat (601) through the rotating seat (604). The seepage limiting plate (605) is elastically rotatably connected to the reset telescopic spring (603).

5. The pressure reducing regulating valve with flow limiting and buffering function according to claim 1, characterized in that: The pressure relief mechanism (7) comprises a guide plate (701), a pressure relief telescopic plate (702) and a connecting seat (703); the guide plate (701) is arranged on the inner side wall of the flow limiting mechanism (2); the pressure relief telescopic plate (702) is inserted into the interior of the guide plate (701); the top end of the pressure relief telescopic plate (702) is fixedly connected to the connecting seat (703); and the exterior of the connecting seat (703) is sleeved with a second pressure relief spring (704).

6. The pressure reducing regulating valve with flow limiting and buffering function according to claim 5, characterized in that: The pressure relief telescopic plate (702) is connected to the outside of the second pressure relief spring (704) via a connecting seat (703), and the pressure relief telescopic plate (702) is elastically telescopically connected to the second pressure relief spring (704), and the inner side of the pressure relief telescopic plate (702) is connected to the second counter-flow channel (204).

7. The pressure reducing regulating valve with flow limiting and buffering function according to claim 1, characterized in that: The guide mechanism (8) comprises a worm guide wheel (801), a rotating bearing seat (802) and a second worm wheel (803), wherein the worm guide wheel (801) is fixedly connected to the bottom end of the first worm (505), the bottom end of the worm guide wheel (801) is connected to the rotating bearing seat (802), and the outer surface of the worm guide wheel (801) is meshed with the second worm wheel (803).

8. The pressure reducing regulating valve with flow limiting and buffering function according to claim 7, characterized in that: The second worm gear (803) is sleeved on the outside of the connecting guide rod (506), and two second worm gears (803) are sleeved on both sides of the outside of the connecting guide rod (506). The worm guide wheel (801) is rotatably connected inside the rotating bearing seat (802).

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