Axial flow type pressure regulator and pressure regulating core

Abstract

The axial flow type pressure regulator comprises a pressure regulator shell and the pressure regulating core, the pressure regulating core comprises a diaphragm mechanism, a valve rod, a cut-off mechanism and a pressure regulating mechanism, the pressure regulating core is installed in the pressure regulator shell, a shell of the diaphragm mechanism is arranged on the periphery of a valve cylinder in a sliding and sleeving mode, and the valve rod is arranged on the valve cylinder. A diaphragm of the diaphragm mechanism is fixedly connected to the periphery of the valve cylinder in a sleeving mode, a second valve opening degree is formed above the valve cylinder, the valve rod longitudinally penetrates through the pressure adjusting core, the cut-off mechanism is installed on the lower portion of the valve rod, and the cut-off mechanism is located at an air inlet below the valve cylinder and can form a first valve opening degree. According to the technical scheme, working condition parameters can be automatically adjusted in real time, so that the functions of pressure adjustment and gas supply are achieved, the gas supply path of a traditional pressure regulator is broken through, the starting pressure difference is reduced to about one tenth of that of an axial flow indirect action type pressure regulator, the pressure regulator is suitable for low-pressure pressure adjustment, the flow coefficient is more targeted, and the service life of the pressure regulator is prolonged. Therefore, the flow characteristics of the urban medium-low pressure area gas supply system are matched.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pressure regulating equipment in a gas transmission and distribution system, in particular to an axial flow pressure regulator and a pressure regulating core. Background Art

[0002] The direct-buried underground pressure regulating system occupies a smaller area than traditional ground facilities, and will not affect the city's appearance and environmental layout after being buried directly underground. With its widespread application in first-tier cities, it has gradually become the preferred solution to the problem of placing gas equipment in urban management.

[0003] The key core component voltage regulator used in the prior art direct buried underground pressure regulating system adopts an axial flow indirect acting voltage regulator. The shape of the axial flow voltage regulator is conducive to the "core pulling" installation method, which can realize the voltage regulator built into the pressure chamber of the underground pressure regulating system, further reducing the space occupied. However, the prior art axial flow voltage regulators all have an indirect acting working principle, consisting of a voltage regulator body and a controller. Their working principle and performance characteristics are more suitable for high-medium pressure or medium-medium pressure pressure regulation control. In the current use of the direct buried underground pressure regulating systems in major cities, the actual application parameters are usually medium-low pressure regulation. The above-mentioned prior art axial flow indirect acting voltage regulators have the following problems:

[0004] 1. High starting pressure difference

[0005] The indirect-acting pressure regulator is a pilot-loaded structure. The main body of the pressure regulator is a normally closed type. The pressure regulator main body valve port can only be opened by continuously loading air pressure through the pilot, and the valve port opening pressure difference is usually 30-50KPa. In common medium-low pressure gas supply systems, the outlet low pressure is usually between 2.5 and 20KPa. This results in the indirect-acting pressure regulator being insufficiently sensitive when used for medium-low pressure regulation, and the opening and adjustment actions are slow to respond, which can easily cause pressure fluctuations and even cause safety hazards.

[0006] 2. Installation method

[0007] The indirect-acting pressure regulator is essentially a product designed for the ground pressure regulating system. The ground pressure regulating system usually adopts the form of pressure pipes with flanges and bolts as the fastening method. In the current underground pressure regulating system technology, in order to reduce the undetectable leakage points after the equipment is buried, the flange connection method is no longer used in its internal connection. Therefore, when the existing underground pressure regulating system adopts the traditional ground pressure regulator, the connection method of the pressure regulator must be modified twice, and the installation method is not suitable for directly buried underground pressure regulating boxes.

[0008] At the same time, since the indirect-acting pressure regulator needs to be used in conjunction with a controller, and the controller must be installed in the top non-pressure chamber to facilitate manual adjustment, when used in a direct-buried pressure regulating system, the pressure regulator body needs to be buried in the pressure regulating system pressure chamber first, and then the controller needs to be installed in the top non-pressure chamber. The inlet pressure, outlet pressure and loading pressure between the two need to be connected through pipes across the pressure chamber and the non-pressure chamber. The installation is more complicated and there are more leakage points.

[0009] 3. Gas path problem

[0010] When the prior art axial flow indirect-acting pressure regulator is used as the "pressure regulating core" of the direct-buried pressure regulating system, regardless of the "up-in and down-out" or "down-in and up-out" gas path structure, the inlet and outlet gases all flow in a straight line upward or downward direction, and the low-pressure gas side of the direct-buried pressure regulating system is provided with a low-pressure buffer zone, which requires the outlet low-pressure gas to diffuse into the buffer zone first and then flow into the horizontal outlet pipe. Therefore, the straight outlet airflow of the prior art pressure regulator is not suitable for the internal flow channel structure of the buried pressure regulating system, and it is necessary to add a guide device inside the system to achieve the drainage effect. However, since the passive drainage of the outlet gas of the pressure regulator will still produce a large flow state change, it will cause certain pressure fluctuations and increased noise.

[0011] 4. Working condition matching problem

[0012] The original intention of the design of the indirect-acting pressure regulator in the prior art is to obtain a larger flow rate with the same caliber, so the design value of the flow coefficient of this type of pressure regulator is relatively high. This flow characteristic is actually more suitable for upstream gas supply systems such as gate stations and distribution stations. In addition to some distribution stations, urban underground pressure regulation systems are mainly small-scale regional gas supply for civil or commercial purposes, and the required gas supply flow rate is very small. This causes the problem that the flow characteristics of the indirect-acting pressure regulator in the prior art do not match the actual working flow demand.

[0013] In terms of flow characteristics, direct-acting pressure regulators are actually more suitable for medium- and low-pressure regional gas supply applications in cities. Taking the traditional ground pressure regulating system as an example, more than 90% of medium- and low-pressure regional pressure regulating equipment use direct-acting pressure regulators. However, the existing direct-acting pressure regulators are not axial flow structures, and their appearance cannot be built into the pressure-bearing cavity of the underground pressure regulating system in a "core-pulling" installation manner, which cannot avoid problems such as space occupation and flange-free installation.

[0014] Therefore, the applicant proposes an axial flow voltage regulator and a voltage regulating core to solve the above problems. Utility Model Content

[0015] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide an axial flow pressure regulator and a pressure regulating core, which do not require the use of a controller and are suitable for low-pressure pressure regulation to match the flow characteristics of medium- and low-pressure regional gas supply systems in cities.

[0016] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0017] A voltage regulating core, comprising:

[0018] A diaphragm mechanism, wherein the housing of the diaphragm mechanism is slidably sleeved on the outer periphery of the valve cylinder, the diaphragm of the diaphragm mechanism is fixedly connected and sleeved on the outer periphery of the valve cylinder, and a second valve port opening is formed above the valve cylinder;

[0019] A valve stem, the valve stem longitudinally passing through the pressure regulating core;

[0020] A cut-off mechanism, wherein the cut-off mechanism is installed at the lower part of the valve stem, and the cut-off mechanism is located at the air inlet below the valve cylinder and can form a first valve opening;

[0021] The pressure regulating mechanism is slidably sleeved outside the valve stem and is used to adjust the opening size of the second valve port.

[0022] Further, the diaphragm mechanism comprises an upper shell and a lower shell which are detachably connected, the upper shell and the lower shell are slidably sleeved on the outer periphery of the valve cylinder, a cavity is formed between the upper shell and the lower shell, the diaphragm is arranged in the cavity, the diaphragm is fixedly connected and sleeved on the outer periphery of the valve cylinder and divides the cavity into an upper diaphragm cavity and a lower diaphragm cavity, and interfaces which communicate with the upper diaphragm cavity and the lower diaphragm cavity are respectively provided on the upper shell and the lower shell;

[0023] The top of the upper shell is detachably connected to an outer support frame, and the outer support frame has a first exhaust flow channel that diffuses circumferentially.

[0024] Furthermore, the voltage regulating core further comprises a top cover, a cover plate and a spring sleeve which are sequentially connected from top to bottom; the spring sleeve and the outer support frame are designed as a separate body;

[0025] The bottom of the spring sleeve is detachably connected to a main valve seat, and a second valve port opening is formed between the main valve seat and the top of the valve cylinder.

[0026] Furthermore, the valve stem includes an adjusting rod, a transition rod and a push rod connected in sequence from top to bottom; the adjusting rod is rotatably arranged on the top cover, one end of which passes through the top cover and is threadedly connected to the nut, and the other end extends to the inside of the top cover, and a polygonal groove is opened at the bottom. The top of the transition rod is polygonal and slidably cooperates with the polygonal groove of the adjusting rod, the lower part of the transition rod extends into the spring sleeve and abuts against the push rod, and the push rod passes through the diaphragm mechanism and extends to the bottom of the lower shell.

[0027] Furthermore, the cutting mechanism comprises:

[0028] A cut-off support frame, the cut-off support frame is located below the lower shell body and is slidably connected to the lower portion of the push rod, and the cut-off support frame has a circumferentially diffused inlet flow channel;

[0029] A cut-off valve seat, the cut-off valve seat being detachably arranged at the bottom of the lower housing;

[0030] A cut-off valve core, wherein the cut-off valve core is installed at the lower part of the push rod, and a first valve port opening is formed between the cut-off valve core and the cut-off valve seat;

[0031] A return spring is sleeved on the outside of the push rod, and two ends of the return spring are respectively connected to the bottom of the cut-off valve core and the inner bottom of the cut-off support frame.

[0032] Furthermore, the voltage regulating mechanism comprises:

[0033] An adjustment plate, the adjustment plate is threadedly connected to the inner wall of the spring sleeve, a polygonal through hole is opened on the adjustment plate, and the lower part of the transition rod is polygonal and passes through the polygonal through hole of the adjustment plate;

[0034] An inner support frame, the inner support frame is slidably mounted on the upper part of the push rod, the inner support frame passes through the main valve seat, and the boss at the bottom of the inner support frame can abut against the support ring at the upper part of the valve cylinder, and the inner support frame has a second exhaust flow channel that diffuses circumferentially;

[0035] A main adjustment spring is sleeved on the outside of the transition rod and the top rod, one end of the main adjustment spring abuts against the bottom of the adjustment plate, and the other end of the main adjustment spring is connected to the top of the inner support frame.

[0036] Furthermore, the cutting mechanism further comprises:

[0037] A cut-off sensor, the cut-off sensor is installed on one side of the top cover, and a cut-off striker is installed on one end of the cut-off sensor located inside the top cover;

[0038] A top sleeve, the top sleeve is rotatably sleeved on the upper part of the transition rod, and the bottom of the top sleeve is rotatably connected to the outer diameter platform of the transition rod, the upper part of the top sleeve extends into the top cover, and a retaining ring is installed on the transition rod located above the top sleeve;

[0039] A lock assembly, used to lock the top sleeve, the lock assembly is installed in the top cover, and the lock assembly can abut and cooperate with the cut-off striker to close the opening of the first valve port;

[0040] The eccentric component is used to open the first valve port opening. The eccentric component is installed on one side of the top cover, and the eccentric component can abut against the top of the top sleeve.

[0041] Furthermore, the lock assembly comprises:

[0042] A lock base, the lock base is installed at the bottom of the top cover;

[0043] Two mounting plates, the two mounting plates are mounted on the lock base;

[0044] A locking rod, the locking rod is rotatably mounted on the upper portion between the two mounting plates, and the cantilever of the locking rod can abut against the cutting striker;

[0045] A lower locking rod, the lower locking rod is rotatably mounted at the lower portion between the two mounting plates, the protrusion of the upper locking rod is used to push the lower locking rod, and the lower locking rod can abut against the top of the top sleeve;

[0046] A tension spring, two ends of which are respectively connected to the locking rod and the lower part of one of the mounting plates.

[0047] Furthermore, it also includes a silencer ring, which is installed in the outer support frame.

[0048] An axial flow voltage regulator comprises the above-mentioned voltage regulator core, including a voltage regulator housing, wherein the voltage regulator core is installed in the voltage regulator housing;

[0049] The voltage regulator housing comprises:

[0050] outer cylinder;

[0051] An inner cylinder, wherein the inner cylinder is arranged inside the outer cylinder, and the top of the inner cylinder and the bottom of the diaphragm mechanism are sealed by a receiving sealing structure;

[0052] A bottom plate, on which the outer cylinder and the inner cylinder are mounted;

[0053] An inlet pipe, the inlet pipe passes through the outer cylinder and is connected with the inner cylinder;

[0054] An outlet pipe, the outlet pipe is communicated with the outer cylinder;

[0055] A top plate is connected to the top of the outer cylinder.

[0056] Compared with the prior art, the utility model provides an axial flow voltage regulator and a voltage regulating core, which have the following beneficial effects:

[0057] 1. The utility model blocks impurities in the gas through a filtering mechanism, can open or close the first valve opening through a cutting mechanism, and can adjust the size of the second valve opening through a pressure regulating mechanism;

[0058] 2. The utility model connects the upper cavity of the diaphragm with the atmosphere, and connects the lower cavity of the diaphragm to the feedback pressure-inducing interface, so that the air pressure enters the lower cavity of the diaphragm and generates an upward thrust on the diaphragm. At the same time, the pressure regulating mechanism generates a downward pressure on the valve cylinder. When the pressure of the pressure regulating mechanism is greater than the thrust of the air pressure, the diaphragm drives the valve cylinder to move downward, increases the opening of the second valve port, and increases the amount of gas passing through, until it reaches a balanced state; when the pressure of the pressure regulating mechanism is less than the thrust of the air pressure, the diaphragm drives the valve cylinder to move upward, reduces the opening of the second valve port, and reduces the amount of gas passing through, until it returns to a balanced state again; the pressure of the pressure regulating mechanism on the valve cylinder can be changed by the valve stem; through the above technical scheme, the utility model can automatically adjust the working parameters in real time, thereby realizing the functions of pressure regulation and gas supply, breaking the gas supply path of the traditional pressure regulator, and reducing the starting pressure difference to about one-tenth of the axial flow indirect-acting pressure regulator, which is suitable for low-pressure pressure regulation, with a more targeted flow coefficient to match the flow characteristics of the urban medium-low pressure area gas supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model as a whole;

[0060] Figure 2 It is a schematic diagram of the front cross-sectional structure of the voltage regulating core of the utility model;

[0061] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0062] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0063] Figure 5 yes Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0064] Figure 6 It is a schematic diagram of the front cross-sectional structure of the gas flow of the utility model;

[0065] Figure 7 It is a schematic diagram of the front cross-sectional structure of the cutting mechanism in the buckled state;

[0066] Figure 8 It is a schematic diagram of the front cross-sectional structure of the cutting sealing state after the cutting mechanism is activated;

[0067] Figure 9 1 is a front view structural diagram of the lock assembly;

[0068] Figure 10 1 is a schematic diagram of the right side structure of the lock assembly;

[0069] Figure 11It is a schematic diagram of the rear view structure of the lock assembly.

[0070] Markings in the figure: 1. Pressure regulator housing; 11. Outer cylinder; 12. Inner cylinder; 13. Bottom plate; 14. Inlet pipe; 15. Outlet pipe; 16. Top plate; 2. Pressure regulating core; 21. Diaphragm mechanism; 211. Upper shell; 212. Lower shell; 213. Diaphragm; 22. Valve cylinder; 23. External support frame; 241. Top cover; 242. Cover plate; 243. Spring sleeve; 244. Main valve seat; 25. Cut-off mechanism; 251. Cut-off support frame; 252. Cut-off valve core; 253. Reset spring; 254. Cut-off sensor; 255. Lock assembly; 2551. Lock base; 2552. Mounting plate; 2553. Upper locking rod; 25 54. Lower locking rod; 2555. Tension spring; 256. Eccentric assembly; 2561. Rotating rod; 257. Top sleeve; 258. Retaining ring; 259. Cut-off valve seat; 26. Valve stem; 261. Adjusting rod; 262. Transition rod; 263. Push rod; 27. Pressure regulating mechanism; 271. Adjusting plate; 272. Inner support frame; 273. Main adjusting spring; 28. Filter mechanism; 281. Filter element; 282. Filter element seat; 3. Diaphragm upper cavity; 4. Diaphragm lower cavity; 5. First valve port opening; 6. Second valve port opening; 7. Silence ring; 8. Atmospheric communication interface; 9. Feedback pressure interface; 10. Nut; 17. Cut-off striker; 18. Stud. DETAILED DESCRIPTION

[0071] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0072] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0073] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0074] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0076] The utility model embodiment provides a voltage regulating core, referring to Figures 1 to 8 , including: a diaphragm mechanism 21, a valve stem 26, a cut-off mechanism 25 and a pressure regulating mechanism 27, the shell of the diaphragm mechanism 21 can be slidably sleeved on the outer periphery of the valve cylinder 22, the diaphragm 213 of the diaphragm mechanism 21 is fixedly connected and sleeved on the outer periphery of the valve cylinder 22, a second valve port opening 6 is formed above the valve cylinder 22, the valve stem 26 longitudinally penetrates the pressure regulating core 2, the cut-off mechanism 25 is installed at the lower part of the valve stem 26, and the cut-off mechanism 25 is located at the air inlet below the valve cylinder 22 to form a first valve port opening 5, and the pressure regulating mechanism 27 is slidably sleeved on the outside of the valve stem 26 for adjusting the size of the second valve port opening 6.

[0077] Specifically, the filter mechanism 28 is installed at the bottom of the diaphragm mechanism 21, and impurities in the gas are blocked by the filter mechanism 28; the first valve opening 5 can be opened or closed by the cut-off mechanism 25; this device realizes the "core pulling" structure and disassembly and assembly of all functional bodies including pressure regulation, cut-off, filtering, etc.

[0078] Reference Figure 1 and Figure 6 An axial flow voltage regulator comprises the above-mentioned voltage regulating core, including: a voltage regulator housing 1, the voltage regulating core 2 is installed in the voltage regulator housing 1, the voltage regulator housing 1 includes: an outer cylinder 11, an inner cylinder 12, a bottom plate 13, an inlet pipe 14, an outlet pipe 15 and a top plate 16, the inner cylinder 12 is arranged inside the outer cylinder 11, and the top of the inner cylinder 12 and the bottom of the diaphragm mechanism 21 are sealed by a receiving sealing structure, the outer cylinder 11 and the inner cylinder 12 are both installed on the bottom plate 13, the inlet pipe 14 passes through the outer cylinder 11 and is connected to the inner cylinder 12, the outlet pipe 15 is connected to the outer cylinder 11, and the top of the outer cylinder 11 is connected to the top plate 16.

[0079] Specifically, the pressure regulating core 2 can be longitudinally inserted into the pressure regulator housing 1; the height of the inner cylinder 12 is shorter than that of the outer cylinder 11; the filtering mechanism 28 is located in the inner cylinder 12; the inlet pipe 14 and the interior of the inner cylinder 12 form a high-pressure chamber, and the outlet pipe 15 and the interior of the outer cylinder 11 form a low-pressure chamber; the pressure regulating core 2 is inserted into the pressure regulator housing 1 through the opening on the top plate 16, and the top of the inner cylinder 12 and the bottom of the diaphragm mechanism 21 are sealed by a socket sealing structure (a socket sealing structure is a common pipeline connection method, which achieves sealing through the mutual cooperation of the socket and the plug. The working principle of the socket sealing structure is to utilize the interference fit between the socket and the plug so that the plug part can be tightly embedded in the socket. In order to enhance the sealing effect, a sealing ring or other sealing material is usually arranged in the socket or the plug. When the plug is inserted into the socket, the sealing ring will be compressed, thereby generating elasticity and friction to prevent medium leakage. In addition, some socket sealing structures will also adopt additional fixing and fastening measures, such as bolt tightening or welding, to ensure the stability and reliability of the connection) for sealing.

[0080] Reference Figure 2 The filter mechanism 28 includes a filter element 281 installed at the bottom of the diaphragm mechanism 21. The filter element 281 blocks impurities in the gas, and the impurities can gradually settle to the bottom of the voltage regulator housing 1 by gravity. A filter element seat 282 is installed at the bottom of the filter element 281.

[0081] Reference Figure 2 and Figure 5 In this embodiment, the diaphragm mechanism 21 includes a detachably connected upper shell 211 and a lower shell 212, the upper shell 211 and the lower shell 212 can be slidably mounted on the outer periphery of the valve cylinder 22, a cavity is formed between the upper shell 211 and the lower shell 212, the diaphragm 213 is arranged in the cavity, the diaphragm 213 is fixedly connected and mounted on the outer periphery of the valve cylinder 22 and divides the cavity into a diaphragm upper chamber 3 and a diaphragm lower chamber 4, the upper shell 211 and the lower shell 212 are respectively provided with interfaces connecting the diaphragm upper chamber 3 and the diaphragm lower chamber 4, the top of the upper shell 211 is detachably connected to an outer support frame 23, and the outer support frame 23 has a first exhaust flow channel that diffuses circumferentially.

[0082] Specifically, the diaphragm upper chamber 3 and the diaphragm lower chamber 4 are respectively connected with interfaces; the diaphragm upper chamber 3 is connected to the external atmosphere through the atmospheric communication interface 8; the diaphragm lower chamber 4 is connected to the low-pressure chamber in the regulator housing 1 through the feedback pressure interface 9; the bottom of the lower housing 212 and the top of the inner cylinder 12 are sealed by a receiving sealing structure; the upper housing 211 and the lower housing 212 are fastened together by bolts; the diaphragm 213 is installed between the upper housing 211 and the lower housing 212, and the edge of the diaphragm 213 is clamped by the upper housing 211 and the lower housing 212 to form a sealing structure.

[0083] Compared with the prior art (specifically, please refer to the Chinese patent application publication number CN117948452A), the voltage regulator housing 1 of the present device is special in that the structure of the partition in the voltage regulator housing 1 of the prior art is eliminated. The prior art is to weld a horizontal partition in the middle of the voltage regulator housing 1 so as to separate the voltage regulator housing 1 into two upper and lower chambers, one as a high-pressure chamber before pressure regulation and the other as a low-pressure chamber after pressure regulation. The voltage regulator housing 1 of the present utility model adopts an outer cylinder 11 and an inner cylinder 12. The structure of the cylinder 12 realizes pressure-bearing and chamber-dividing, wherein the inlet pipe 14 and the interior of the inner cylinder 12 form a high-pressure chamber, the inner cylinder 12 and the lower shell 212 are sealed by a receiving sealing structure, the outer cylinder 11 is connected to the first exhaust flow channel of the outer support frame 23, and the outlet pipe 15 and the interior of the outer cylinder 11 form a low-pressure chamber. This structure of inner and outer chambers increases the available volume of the low-pressure chamber, solves the problem of the partition occupying the space of the low-pressure chamber in the prior art, provides a larger buffer volume for the low-pressure gas, and is more conducive to pressure balance and reduces fluctuations.

[0084] Among them, refer to Figure 4 In this embodiment, a silencer ring 7 is also included, and the silencer ring 7 is installed in the outer support frame 23.

[0085] Specifically, the bottom of the silencer ring 7 abuts against the top of the upper shell 211; the silencer ring 7 is actually not a wearing part and does not require routine maintenance in daily use, but after years of use, it may be blocked or damaged by impurities or cavitation. Therefore, this embodiment adopts a detachable connection between the silencer ring 7 and the outer support frame 23.

[0086] Reference Figure 6 , gas flow direction: the gas enters the inner cylinder 12 along the inlet pipe 14, is filtered by the filter element 281, and then enters the valve cylinder 22 through the first valve opening 5, and then passes through the second valve opening 6, the silencer ring 7 and the first exhaust flow channel in sequence, and the gas enters the low-pressure chamber. The gas is first collected in the low-pressure chamber, a small part of the gas enters the lower chamber 4 of the diaphragm, and most of the gas is supplied to the downstream pipeline; by setting up the low-pressure chamber, an additional gas storage space of fixed volume is provided, which provides an effective buffering effect on the imbalance between gas supply and gas use; at the same time, the upper chamber 3 of the diaphragm is connected to the atmosphere, and the lower chamber 4 of the diaphragm is connected to the low-pressure chamber, so that the pressure regulator of this embodiment has a lower starting pressure difference, and there is no need to use the controller in the prior art.

[0087] Reference Figures 2 to 4 In this embodiment, the pressure regulating core 2 also includes a top cover 241, a cover plate 242 and a spring sleeve 243 connected in sequence from top to bottom; the spring sleeve 243 and the outer support frame 23 are designed to be split, and the bottom of the spring sleeve 243 is detachably connected to the main valve seat 244, and a second valve opening 6 is formed between the main valve seat 244 and the top of the valve cylinder 22.

[0088] Specifically, the top cover 241 is fastened to the cover plate 242 by bolts; the cover plate 242 is fastened to the top plate 16 by bolts; the outer support frame 23 is connected to the upper shell 211 by bolts; a through hole is opened in the middle of the cover plate 242, and the top of the spring sleeve 243 is installed in the through hole; the top of the valve cylinder 22 has a cutting edge, and the diameter of the cutting edge gradually increases from the bottom to the top. By setting the cutting edge, when the valve cylinder 22 contacts the main valve seat 244, that is, when the cutting edge is pressed against the main valve seat 244, there is a smaller contact area, and when the force is equal, there is a greater pressure, thereby obtaining a better clamping force.

[0089] Reference Figure 4 There is no fastening form between the spring sleeve 243 and the outer support frame 23, and the end faces of the two are in direct contact. The design here is to use the structure of the cover plate 242 and the top cover 241 connected as one body to fasten the top plate 16 with bolts to generate a compression force on the spring sleeve 243, and apply a downward thrust to the lower components such as the outer support frame 23, the upper shell 211 and the lower shell 212 through the end surface of the spring sleeve 243, and form a compression relationship through the receiving and sealing structure between the bottom of the lower shell 212 and the inner cylinder 12, so as to achieve the entire pressure regulation The installation and fixation of the core 2 not only simplifies the installation form of the pressure regulating core 2, but also the split structure of the spring sleeve 243 and the outer support frame 23 can realize online maintenance. The main valve seat 244 is directly fixed to the inner side of the bottom of the spring sleeve 243 by threads. When the cover plate 242 and the top cover 241 are removed, the spring sleeve 243 can be pulled out together with the main valve seat 244, so that the main valve seat 244 can be removed on the spot for replacement to realize online maintenance; the modular design of each part of the pressure regulating core 2 is convenient for overall disassembly and assembly, and convenient for maintenance of the pressure regulator.

[0090] Reference Figures 2 to 5 In this embodiment, the valve stem 26 includes an adjusting rod 261, a transition rod 262 and a push rod 263 connected in sequence from top to bottom; the adjusting rod 261 is rotatably arranged on the top cover 241, one end of which passes through the top cover 241 and is threadedly connected to the nut 10, and the other end extends to the inside of the top cover 241, and a polygonal groove is opened at the bottom thereof. The top of the transition rod 262 is polygonal and slidably cooperates with the polygonal groove of the adjusting rod 261, and the lower part of the transition rod 262 extends into the spring sleeve 243 and abuts against the push rod 263, and the push rod 263 passes through the diaphragm mechanism 21 and extends to the bottom of the lower shell 212.

[0091] Specifically, a maximum outer diameter platform is provided in the middle of the adjusting rod 261, which is limited by the top plane inside the top cover 241. A second bearing sleeved on the outside of the adjusting rod 261 is installed at the contact point between the bottom of the nut 10 and the top surface of the top cover 241. The portion of the top of the adjusting rod 261 where the nut 10 is exposed is a polygonal structure, preferably a square. Similarly, the polygonal groove at the bottom of the adjusting rod 261, the top of the transition rod 262 and the bottom of the transition rod 262 are all square structures. The upward and downward movement of the adjusting rod 261 is limited by the tightening of the nut 10 and the second bearing and the maximum outer diameter platform, but it can easily rotate under the action of the second bearing; the transition rod 2 The top of 62 is a square structure and is always sleeved in the square groove at the bottom of the adjusting rod 261, ensuring that the transition rod 262 can be driven to rotate together when the adjusting rod 261 rotates; the transition rod 262 and the top rod 263 are used for positioning through the hole and the shaft rod. The transition rod 262 and the top rod 263 are not directly connected. The reset spring 253 provides an upward thrust to the cut-off valve core 252, thereby applying an upward thrust to the top rod 263, so that the top rod 263 holds the transition rod 262, thereby realizing the abutment between the transition rod 262 and the top rod 263; the top rod 263 passes through the diaphragm mechanism 21 and extends into the filter element 281.

[0092] Reference Figure 2 and Figure 5 In this embodiment, the cut-off mechanism 25 includes: a cut-off support frame 251, a cut-off valve seat 259, a cut-off valve core 252 and a reset spring 253. The cut-off support frame 251 is located below the lower shell 212 and is slidably connected to the lower part of the push rod 263. The cut-off support frame 251 has a circumferentially diffused intake flow channel. The cut-off valve seat 259 is detachably arranged at the bottom of the lower shell 212. The cut-off valve core 252 is installed at the lower part of the push rod 263, and a first valve port opening 5 is formed between the cut-off valve core 252 and the cut-off valve seat 259. The reset spring 253 is sleeved on the outside of the push rod 263, and the two ends of the reset spring 253 are respectively connected to the bottom of the cut-off valve core 252 and the inner bottom of the cut-off support frame 251.

[0093] Specifically, the cut-off valve seat 259 is directly fixed to the inner side of the bottom of the lower shell 212 by threads; the cut-off valve core 252 is slidingly connected to the cut-off support 251; after the gas is filtered by the filter element 281, it enters the valve cylinder 22 through the inlet flow channel and the first valve port opening 5 in turn.

[0094] A stud 18 is installed with a vertical thread in the middle of the filter element seat 282, and the stud 18 is threadedly connected to the bottom of the cutting bracket 251, so that the height of the cutting bracket 251 in the filter element 281 can be adjusted so that the top of the cutting bracket 251 abuts against the bottom of the lower shell 212. A sliding groove is opened at the bottom of the cutting bracket 251, and the lower part of the push rod 263 is inserted into the sliding groove, so that the push rod 263 can move up and down in the sliding groove.

[0095] Among them, referring to Figure 2 and Figure 4 , in this embodiment, the cutting mechanism 25 further includes: a cutting sensor 254, a top sleeve 257, a locking component 255, and an eccentric component 256. The cutting sensor 254 is installed on one side of the top cover 241. A cutting striker 17 is installed at one end of the cutting sensor 254 located inside the top cover 241. The top sleeve 257 is rotatably sleeved on the upper part of the transition rod 262, and the bottom of the top sleeve 257 is rotatably connected to the outer diameter platform of the transition rod 262. The upper part of the top sleeve 257 extends into the top cover 241, and a retaining ring 258 is installed on the transition rod 262 above the top sleeve 257 for locking the top sleeve 257. The locking component 255 is installed inside the top cover 241, and the locking component 255 can be in abutting cooperation with the cutting striker 17 to close the opening degree 5 of the first valve port. The eccentric component 256 is used to open the opening degree 5 of the first valve port. The eccentric component 256 is installed on one side of the top cover 241, and the eccentric component 256 can abut against the top of the top sleeve 257.

[0096] Specifically, the cutting sensor 254 is a prior art, which can be piston type or thin film type. A signal feedback pipeline (not shown in the figure) is connected between the thin film cavity in the cutting sensor 254 and the low-pressure cavity in the pressure regulator housing 1. The cutting sensor 254 in this application is only used as a triggerable striker or hammer, and its driving method can be electromagnetic drive, cylinder drive or motor drive. Its structure and principle are both conventional designs and will not be elaborated here too much; the cutting sensor 254 can drive the cutting striker 17 to move left and right; a section of the upper part of the transition rod 262 in contact with the top sleeve 257 can be cylindrical; a section of the transition rod 262 below the outer diameter platform is square in structure; the transition rod 262 passes through the top sleeve 257, and the bottom of the top sleeve 257 abuts against the outer diameter platform of the transition rod 262 through a first bearing. At the same time, the transition rod 262 is clamped by the retaining ring 258 above the top sleeve 257, so that the transition rod 262 and the top sleeve 257 are bound together, enabling the top sleeve 257 and the transition rod 262 to move up and down synchronously; the eccentric component 256 is installed on one side of the top cover 241 away from the cutting sensor 254.

[0097] Referring to Figure 4The eccentric assembly 256 includes a rotating rod 2561 which is horizontally mounted on one side of the top cover 241. The end of the rotating rod 2561 located outside the top cover 241 is in a square structure. A disc is mounted on one end of the rotating rod 2561 extending into the top cover 241. An eccentric rod 2562 is mounted on the side of the disc away from the rotating rod 2561. The eccentric rod 2562 can abut against the top of the top sleeve 257. The eccentric assembly 256 is a reset part for the cut-off valve core 252. The rotating rod 256 is rotated by a wrench. 1, thereby driving the disc to rotate, and then driving the eccentric rod 2562 to rotate. The eccentric rod 2562 will generate a downward thrust on the top sleeve 257 with the rotation angle. From the above, it can be seen that the top sleeve 257 and the transition rod 262 can move synchronously. Therefore, after the top sleeve 257 is subjected to force, it moves downward together with the transition rod 262, and at the same time pushes the top rod 263 downward. Under the action of force transmission, the top rod 263 drives the cut-off valve core 252 to move downward, thereby obtaining a cut-off valve opening of a certain distance (i.e., the first valve port opening 5).

[0098] Reference Figure 4 , Figure 9 , Figure 10 and Figure 11 In this embodiment, the lock assembly 255 includes: a lock base 2551, two mounting plates 2552, an upper locking rod 2553, a lower locking rod 2554 and a tension spring 2555. The lock base 2551 is installed on the inner bottom of the top cover 241, and the two mounting plates 2552 are installed on the lock base 2551. The upper locking rod 2553 is rotatably installed at the upper part between the two mounting plates 2552. The cantilever of the upper locking rod 2553 can abut against the cutting striker 17. The lower locking rod 2554 is rotatably installed at the lower part between the two mounting plates 2552. The protrusion of the upper locking rod 2553 is used to push the lower locking rod 2554, and the lower locking rod 2554 can abut against the top of the top sleeve 257. The two ends of the tension spring 2555 are respectively connected to the upper locking rod 2553 and the lower part of one of the mounting plates 2552.

[0099] Specifically, refer to Figure 7 , the mounting plate 2552 is vertically mounted on the lock base 2551; under the tension of the tension spring 2555, the upper locking rod 2553 will automatically rotate clockwise and push the lower locking rod 2554 downward through its protrusion until the upper locking rod 2553 and the lower locking rod 2554 reach the lock limit state (see Figure), at this time, the lower locking rod 2554 buckles the top of the top sleeve 257, and when the external force on the rotating rod 2561 stops, the reset spring 253 has an upward thrust and is transmitted to the top sleeve 257 through the top rod 263 and the transition rod 262, and makes the top sleeve 257 have an upward movement trend, but the top of the top sleeve 257 is locked by the lock assembly 255 and cannot move upward, thereby reaching the buckled state of the cut-off valve core 252.

[0100] Reference Figure 8 When the air pressure in the low-pressure chamber of the pressure regulator housing 1 exceeds the pressure, the cut-off sensor 254 will first jump to release the cut-off striker 17, and the cut-off striker 17 will hit the cantilever of the upper locking rod 2553 to the right, thereby causing the upper locking rod 2553 to rotate counterclockwise and eliminating the downward thrust applied by the upper locking rod 2553 to the lower locking rod 2554, so that the locking of the lower locking rod 2554 to the top sleeve 257 disappears, and then under the upward thrust of the return spring 253, the top rod 263, the transition rod 262 and the top sleeve 257 are driven to move upward together, until the cut-off valve core 252 hits the cut-off valve seat 259 and forms a tight seal, and the cut-off mechanism 25 reaches the cut-off sealing state after jumping, and at the same time, the eccentric rod 2562 will automatically rotate upward under the upward thrust of the return spring 253, and the rotating rod 2561 rotates synchronously.

[0101] When the prior art axial flow indirect acting pressure regulator is used as the "pressure regulating core" of the direct buried pressure regulating system, its first exhaust flow channel adopts the same pipeline structure as the intake flow channel. Regardless of the "up-in and down-out" or "down-in and up-out" gas path structure, the gas at its inlet and outlet (i.e., the intake flow channel and the first exhaust flow channel) flows in a straight line upward or downward direction, and the low-pressure gas side of the direct buried pressure regulating system is provided with a low-pressure buffer zone (i.e., a low-pressure chamber), which requires the outlet low-pressure gas to diffuse into the buffer zone first and then converge into the horizontal outlet pipe. Therefore, the linear outlet airflow of the prior art pressure regulator is not suitable for the internal structure of the buried pressure regulating system. The flow channel structure requires adding a guide device inside the system to achieve the function of diversion. In this embodiment, the first exhaust flow channel is set on the outer circular surface of the outer support frame 23. The first exhaust flow channel of the voltage regulator in the prior art does not adopt the same pipeline structure as the intake flow channel. Instead, it adopts the form of direct diffusion and diversion to the low-pressure chamber of the voltage regulator housing 1. The gas is directly transformed into a flow state that diffuses in all directions through the first exhaust flow channel, reducing the intermediate process of the gas in the first exhaust flow channel of the voltage regulator to transition to the buffer zone of the direct-buried voltage regulation system, further reducing the space occupancy while more effectively reducing various problems caused by flow state changes.

[0102] Reference Figure 2 and Figure 5In this embodiment, the pressure regulating mechanism 27 includes: an adjusting plate 271, an inner support frame 272 and a main adjusting spring 273. The adjusting plate 271 is threadedly connected to the inner wall of the spring sleeve 243. A polygonal through hole is opened on the adjusting plate 271. The lower part of the transition rod 262 is polygonal and passes through the polygonal through hole of the adjusting plate 271. The inner support frame 272 is slidably installed on the upper part of the push rod 263. The inner support frame 272 passes through the main valve seat 244, and the boss at the bottom of the inner support frame 272 can abut against the support ring at the upper inner part of the valve cylinder 22. The inner support frame 272 has a second exhaust flow channel that diffuses circumferentially. The main adjusting spring 273 is sleeved on the outside of the transition rod 262 and the push rod 263. One end of the main adjusting spring 273 abuts against the bottom of the adjusting plate 271, and the other end of the main adjusting spring 273 is connected to the top of the inner support frame 272.

[0103] Specifically, the polygonal through hole of the adjustment plate 271 is preferably a square through hole; when the transition rod 262 rotates, the adjustment plate 271 is driven to rotate together through the square through hole, and the outer circle of the adjustment plate 271 is a threaded structure, and forms a threaded transmission with the inner wall thread of the spring sleeve 243. Because the spring sleeve 243 is fixed, the adjustment plate 271 can move up and down during the rotation process under the action of the threaded transmission; after the gas passes through the valve cylinder 22, and then passes through the second exhaust flow channel, the second valve port opening 6, the silencer ring 7 and the first exhaust flow channel in turn, the gas enters the low-pressure chamber; the force of the main adjustment spring 273 is transmitted to the valve cylinder 22 through the inner support frame 272, so that the boss at the bottom of the inner support frame 272 can always be abutted against the support ring on the upper inner part of the valve cylinder 22.

[0104] When the adjusting rod 261 is rotated clockwise, the adjusting rod 261 drives the transition rod 262 to rotate, and the transition rod 262 drives the adjusting plate 271 to rotate together. Due to the transmission effect of the inner wall thread of the spring sleeve 243, the adjusting plate 271 moves downward, and the main adjusting spring 273 is compressed downward under the reaction of the inner frame 272 to increase the spring loading force, thereby increasing the pressure adjustment setting value; conversely, when the adjusting rod 261 is rotated counterclockwise, the adjusting rod 261 drives the transition rod 262 to rotate, thereby driving the adjusting plate 271 to move upward, and the main adjusting spring 273 is stretched upward under the reaction of the inner frame 272 to reduce the spring loading force, thereby reducing the pressure adjustment setting value.

[0105] Working principle: In the initial state, the cut-off valve core 252 is in the buckled state, that is, there is a first valve opening of 5 between the cut-off valve core 252 and the cut-off valve seat 259. In the initial state, there is no air pressure in the low-pressure chamber, so the air pressure fed back to the lower chamber 4 of the diaphragm by the feedback pressure interface 9 is zero. In the force balance system of the diaphragm 213, due to the lack of lower air pressure loading force, the force of the main adjustment spring 273 is transmitted to the valve cylinder 22 through the inner support frame 272, and the valve cylinder 22 is pushed downward. At this time, the top edge of the valve cylinder 22 maintains a certain distance from the main valve seat 244. The regulator opening, that is, there is an initial second valve opening of 6 between the top of the valve cylinder 22 and the main valve seat 244;

[0106] The upstream gas before pressure regulation enters the inner cylinder 12 along the inlet pipe 14, and the gas passes through the filter element 281 and blocks the impurities. The impurities can gradually settle to the bottom of the inner cylinder 12 by gravity, and then the gas passes through the inlet flow channel of the cut-off support frame 251, and then enters the valve cylinder 22 through the first valve opening 5. After the gas passes through the valve cylinder 22, it passes through the second exhaust flow channel of the inner support frame 272, the second valve opening 6, the silencer ring 7 and the first exhaust flow channel of the outer support frame 23 in sequence, and then enters the low-pressure chamber. As the gas in the low-pressure chamber increases, the air pressure gradually increases. As the air pressure in the low-pressure chamber increases, the air pressure loading thrust of the diaphragm lower chamber 4 also gradually increases. When the low-pressure air pressure loading thrust on the diaphragm 213 is equal to the loading force of the main adjustment spring 273, the pressure regulator reaches a force balance state;

[0107] Once the gas consumption increases or decreases, the force balance state of the pressure regulator is broken, and a series of actions of the pressure regulator will be caused; when the gas consumption increases, the downstream gas pressure decreases, and the gas pressure loading thrust of the lower chamber 4 of the diaphragm decreases, then the loading force of the main adjusting spring 273 pushes the valve cylinder 22 to move downward, thereby increasing the opening of the pressure regulator (i.e., the second valve opening 6), so that more gas can pass into the low-pressure chamber, until the gas pressure loading thrust of the lower chamber 4 of the diaphragm and the loading force of the main adjusting spring 273 return to a balanced state again; when the gas consumption decreases, the downstream gas pressure increases, and the gas pressure loading thrust of the lower chamber 4 of the diaphragm increases, then the gas pressure loading thrust overcomes the loading force of the main adjusting spring 273 and pushes the valve cylinder 22 upward, thereby reducing the opening of the pressure regulator (i.e., the second valve opening 6), so as to reduce the gas passing into the low-pressure chamber, until the gas pressure loading thrust of the lower chamber 4 of the diaphragm and the loading force of the main adjusting spring 273 return to a balanced state again; the pressure regulator automatically adjusts the operating parameters in real time based on the above principle, thereby achieving the functions of pressure regulation and gas supply.

[0108] Through the above technical scheme, the utility model can automatically adjust the operating parameters in real time, thereby realizing the functions of pressure regulation and gas supply, breaking the gas supply path of the traditional pressure regulator, and reducing the starting pressure difference to about one tenth of the axial flow indirect acting pressure regulator. It is suitable for low-pressure pressure regulation, and uses a more targeted flow coefficient to match the flow characteristics of the urban medium-low pressure area gas supply system.

[0109] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0110] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A voltage regulating core, characterized in that: include: A diaphragm mechanism (21), wherein a housing of the diaphragm mechanism (21) is slidably sleeved on the outer periphery of the valve cylinder (22), a diaphragm (213) of the diaphragm mechanism (21) is fixedly connected and sleeved on the outer periphery of the valve cylinder (22), and a second valve port opening (6) is formed above the valve cylinder (22); A valve stem (26), wherein the valve stem (26) longitudinally penetrates the pressure regulating core (2); A cut-off mechanism (25), the cut-off mechanism (25) being mounted on the lower portion of the valve stem (26), and the cut-off mechanism (25) being located at the air inlet below the valve cylinder (22) and capable of forming a first valve opening (5); A pressure regulating mechanism (27) is slidably sleeved outside the valve stem (26) and is used to adjust the size of the second valve port opening (6).

2. The voltage regulating core according to claim 1, characterized in that: The diaphragm mechanism (21) comprises an upper shell (211) and a lower shell (212) which are detachably connected, the upper shell (211) and the lower shell (212) are slidably sleeved on the outer periphery of the valve cylinder (22), a cavity is formed between the upper shell (211) and the lower shell (212), the diaphragm (213) is arranged in the cavity, the diaphragm (213) is fixedly connected and sleeved on the outer periphery of the valve cylinder (22) and divides the cavity into an upper diaphragm cavity (3) and a lower diaphragm cavity (4), and interfaces for communicating the upper diaphragm cavity (3) and the lower diaphragm cavity (4) are respectively provided on the upper shell (211) and the lower shell (212); The top of the upper shell (211) is detachably connected to an outer support frame (23), and the outer support frame (23) has a first exhaust flow channel that diffuses in a circumferential direction.

3. The voltage regulating core according to claim 2, characterized in that: The voltage regulating core (2) further comprises a top cover (241), a cover plate (242) and a spring sleeve (243) which are connected in sequence from top to bottom; the spring sleeve (243) and the outer support frame (23) are of separate design; The bottom of the spring sleeve (243) is detachably connected to a main valve seat (244), and a second valve port opening (6) is formed between the main valve seat (244) and the top of the valve cylinder (22).

4. The voltage regulating core according to claim 3, characterized in that: The valve stem (26) comprises an adjusting rod (261), a transition rod (262) and a push rod (263) which are connected in sequence from top to bottom; the adjusting rod (261) is rotatably arranged on the top cover (241), one end of which passes through the top cover (241) and is threadedly connected to the nut (10), and the other end extends to the inside of the top cover (241), and a polygonal groove is opened at the bottom thereof; the top of the transition rod (262) is polygonal and slidably cooperates with the polygonal groove of the adjusting rod (261); the lower part of the transition rod (262) extends into the spring sleeve (243) and abuts against the push rod (263); the push rod (263) passes through the diaphragm mechanism (21) and extends to the bottom of the lower shell (212).

5. The voltage regulating core according to claim 4, characterized in that: The cutting mechanism (25) comprises: A cut-off support frame (251), the cut-off support frame (251) being located below the lower shell (212) and being slidably connected to the lower portion of the push rod (263), the cut-off support frame (251) having a circumferentially diffused intake air channel; A cut-off valve seat (259), the cut-off valve seat (259) being detachably disposed at the bottom of the lower housing (212); A cut-off valve core (252), wherein the cut-off valve core (252) is mounted on the lower portion of the push rod (263), and a first valve port opening (5) is formed between the cut-off valve core (252) and the cut-off valve seat (259); A return spring (253) is sleeved on the outside of the push rod (263), and two ends of the return spring (253) are respectively connected to the bottom of the cut-off valve core (252) and the inner bottom of the cut-off support frame (251).

6. The voltage regulating core according to claim 5, characterized in that: The pressure regulating mechanism (27) comprises: an adjusting plate (271), the adjusting plate (271) being threadedly connected to the inner wall of the spring sleeve (243), the adjusting plate (271) being provided with a polygonal through hole, the lower portion of the transition rod (262) being polygonal and passing through the polygonal through hole of the adjusting plate (271); An inner support frame (272), the inner support frame (272) being slidably mounted on the upper portion of the push rod (263), the inner support frame (272) passing through the main valve seat (244), and the boss at the bottom of the inner support frame (272) being capable of abutting against a support ring at the inner upper portion of the valve cylinder (22), the inner support frame (272) having a second exhaust flow channel that diffuses in a circumferential direction; A main adjustment spring (273), wherein the main adjustment spring (273) is sleeved on the outside of the transition rod (262) and the top rod (263), one end of the main adjustment spring (273) is in contact with the bottom of the adjustment plate (271), and the other end of the main adjustment spring (273) is connected to the top of the inner support frame (272).

7. The voltage regulating core according to claim 6, characterized in that: The cutting mechanism (25) further comprises: A cut-off sensor (254), the cut-off sensor (254) being mounted on one side of the top cover (241), and a cut-off striker (17) being mounted on one end of the cut-off sensor (254) located inside the top cover (241); A top sleeve (257), the top sleeve (257) being rotatably sleeved on the upper portion of the transition rod (262), and the bottom of the top sleeve (257) being rotatably connected to the outer diameter platform of the transition rod (262), the upper portion of the top sleeve (257) extending into the top cover (241), and a retaining ring (258) being installed on the transition rod (262) located above the top sleeve (257); A locking assembly (255) for locking the top sleeve (257), wherein the locking assembly (255) is installed in the top cover (241), and the locking assembly (255) can abut against the cut-off striker (17) to close the first valve port opening (5); The eccentric component (256) is used to open the first valve port opening (5); the eccentric component (256) is mounted on one side of the top cover (241); the eccentric component (256) is capable of abutting against the top of the top sleeve (257).

8. The voltage regulating core according to claim 7, characterized in that: The locking assembly (255) comprises: A locking base (2551), wherein the locking base (2551) is installed on the inner bottom of the top cover (241); Two mounting plates (2552), the two mounting plates (2552) being mounted on the locking base (2551); A locking rod (2553), the locking rod (2553) being rotatably mounted on the upper portion between the two mounting plates (2552), the cantilever of the locking rod (2553) being capable of abutting against the cutting striker (17); a lower locking rod (2554), the lower locking rod (2554) being rotatably mounted on the lower portion between the two mounting plates (2552), the protrusion of the upper locking rod (2553) being used to push the lower locking rod (2554), and the lower locking rod (2554) being capable of abutting against the top of the top sleeve (257); A tension spring (2555), wherein two ends of the tension spring (2555) are respectively connected to the locking rod (2553) and the lower portion of one of the mounting plates (2552).

9. The voltage regulating core according to claim 8, characterized in that: It also includes a silencer ring (7), wherein the silencer ring (7) is installed in the outer support frame (23).

10. An axial flow voltage regulator, comprising the voltage regulating core according to any one of claims 1 to 9, characterized in that: It comprises a voltage regulator housing (1), wherein the voltage regulator core (2) is installed in the voltage regulator housing (1); The voltage regulator housing (1) comprises: Outer cylinder (11); An inner cylinder (12), wherein the inner cylinder (12) is arranged inside the outer cylinder (11), and a sealing is performed between the top of the inner cylinder (12) and the bottom of the diaphragm mechanism (21) via a receiving sealing structure; A bottom plate (13), the outer cylinder (11) and the inner cylinder (12) are both mounted on the bottom plate (13); an inlet pipe (14), wherein the inlet pipe (14) passes through the outer cylinder (11) and is in communication with the inner cylinder (12); An outlet pipe (15), the outlet pipe (15) being in communication with the outer cylinder (11); A top plate (16), wherein the top of the outer cylinder (11) is connected to the top plate (16).

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