High-adaptability building voltage regulator

Abstract

The high-adaptability building pressure regulator comprises a pressure regulator body provided with an air inlet pipe and an air outlet pipe, a valve port adjusted through a valve rod is formed in the pressure regulator body, a first membrane assembly is arranged on the air inlet side, located on the valve port, of the valve rod, the valve rod is of a hollow structure, and a second membrane assembly is further installed on the valve rod in a matched mode. A second diaphragm lower cavity of the second diaphragm assembly is communicated with the exhaust side of the valve port through a hollow valve rod. The pressure sensor is simple in structure, sensitive in transmission and better in adaptability to flow, pressure and installation size, through the structure of the straight rod and the inner balance film, the influence of the lever ratio does not exist, force value induction is more direct, and the coverage of the available pressure range is more sufficient.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage regulator equipment, in particular to a high-adaptability building voltage regulator. Background Art

[0002] In the urban natural gas pipeline network, residential gas supply usually adopts the method of centralized pressure regulation in buildings, and often uses small pressure regulators (pressure regulating boxes) suitable for building installation and use. Building pressure regulators cover a wide area and many points in the city's medium and low pressure system. At the same time, the accumulation of various types of products has also exposed the problem of product adaptability.

[0003] The shortcomings of the existing voltage regulator in terms of adaptability:

[0004] 1. Traffic adaptability

[0005] The existing building pressure regulators adopt different technical routes, especially there are large differences in the design standards for rated flow, resulting in different air pressure values ​​required for different products with the same rated flow. This increases the difficulty of user selection, and it is impossible to confirm whether the operating conditions are met based on the rated flow alone.

[0006] 2. Pressure adaptability

[0007] The existing building pressure regulator usually adopts a lever structure, which amplifies the force of the pressure-sensitive element through the lever to obtain sufficient driving force. However, the unequal ratio of the lever also limits its adaptable pressure range, and it usually cannot adapt to higher pressure values. It cannot meet the current demand for increasing the gas supply pressure of the urban pipeline network.

[0008] 3. Installation suitability

[0009] In the prior art, the installation dimensions of building voltage regulator products of various manufacturers vary, and there is no unified standard. Gas companies in the same city often use different products from multiple manufacturers over the years. When new and old products are replaced, the adaptation problem of installation dimensions becomes a major concern.

[0010] Therefore, the applicant proposes a highly adaptable building voltage regulator to solve the above problems. Utility Model Content

[0011] In view of the deficiencies in the prior art, the utility model aims to provide a building voltage regulator with high adaptability.

[0012] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0013] A highly adaptable building pressure regulator comprises a pressure regulator body provided with an air inlet pipe and an air outlet pipe, wherein a valve port adjusted by a valve stem is provided in the pressure regulator body, wherein the valve stem is provided with a first diaphragm assembly on the air inlet side of the valve port, wherein the valve stem is a hollow structure, and a second diaphragm assembly is also mounted on the valve stem, wherein a second diaphragm lower cavity of the second diaphragm assembly is connected to an exhaust side of the valve port through the hollow valve stem.

[0014] Furthermore, the second diaphragm assembly includes a lower diaphragm cover and an upper diaphragm cover installed on the upper part of the pressure regulator body, a second diaphragm is installed between the lower diaphragm cover and the upper diaphragm cover, the second diaphragm divides the cavity surrounded by the lower diaphragm cover and the upper diaphragm cover into a second diaphragm upper cavity and a second diaphragm lower cavity, the second diaphragm is provided with a vent hole connecting the second diaphragm upper cavity and the second diaphragm lower cavity, and a vent valve core for sealing the vent hole is installed on the valve stem.

[0015] Furthermore, a guide rod extending to the upper cavity of the second diaphragm is vertically installed on the top of the relief valve core, and a gap is provided between the guide rod and the inner wall of the relief hole.

[0016] Furthermore, a conical sealing arrangement is formed between the relief hole and the relief valve core.

[0017] Furthermore, a breathing valve is installed on the upper membrane cover.

[0018] Furthermore, the first diaphragm assembly includes a first diaphragm, the first diaphragm is installed in the pressure regulator body through a supporting frame, and the middle part of the first diaphragm is connected to the valve stem.

[0019] Furthermore, a cut-off valve is installed on the inlet flow passage of the voltage regulator body.

[0020] Furthermore, the valve port includes a valve core installed on the valve stem and a valve seat capable of cooperating with the valve core.

[0021] Furthermore, the bottom of the valve stem is connected to an extension pipe extending into the air outlet pipe.

[0022] Furthermore, the valve core is sleeved on the top of the extension tube.

[0023] Compared with the prior art, the utility model provides a highly adaptable building voltage regulator, which has the following beneficial effects:

[0024] 1. In the utility model, the gas P1 from the upstream pipeline enters the pressure regulator body through the air inlet pipe. After being purified, the gas enters the air inlet side of the valve port. The air pressure P1 generates an upward pneumatic thrust on the first diaphragm assembly, and at the same time flows downward through the valve port to the downstream pipeline.

[0025] 2. At the beginning of ventilation, the utility model, because there is no air pressure at the rear end of the valve port in the pressure regulator body, the valve stem is pushed downward under the thrust of the second diaphragm assembly, so that a certain initial opening is formed at the valve port. Therefore, the air pressure P1 can enter the exhaust side of the valve port through the initial opening, and then lead to the downstream pipeline through the outlet pipe. As the air pressure in the downstream pipeline gradually rises, when it reaches the preset value of P2, the pressure regulator reaches internal balance inside, specifically, the upward thrust of P1 on the first diaphragm assembly and the downward thrust of P1 on the valve core of the valve port are balanced. This balance effectively eliminates the thrust effect of P1 on the valve core. When P1 changes, the pressure regulator can also achieve dynamic balance under the influence of this balance and will not fluctuate due to changes in P1. This balance provides better adaptability for the pressure range of the pressure regulator, while the lever-type structure of the prior art will cause P2 pressure fluctuations when the P1 pressure changes.

[0026] 3. The utility model forms an internal balance structure through the cooperation of the second diaphragm assembly, the valve port, the first diaphragm assembly and the valve stem, which can provide a wider flow adaptation range, and the utility model uniformly designs the rated flow according to the 0.1MPa front pressure.

[0027] 4. The utility model adopts the structure of straight rod (valve stem) + internal balance diaphragm (first diaphragm assembly and second diaphragm assembly), so there is no influence of lever ratio, which makes force value sensing more direct and covers the available pressure range more fully.

[0028] 5. The utility model adopts a modular design and a split design for the voltage regulator body. It can change the distance between the air inlet pipe and the air outlet pipe of the voltage regulator body by adapting the short circuit or the elbow according to the user's installation center distance size requirements, and can achieve high adaptability of installation by cooperating with corresponding connecting parts, which is convenient and flexible to change the installation size, covering the interchangeability of most products in the existing technology.

[0029] 6. The utility model has a simple structure, sensitive transmission, and better adaptability to flow, pressure and installation dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0031] Figure 2 It is a front view structural schematic diagram of the utility model;

[0032] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0033] Figure 4 It is a rear view structural schematic diagram of the utility model;

[0034] Figure 5 yes Figure 4A schematic diagram of a top-view cross-sectional structure;

[0035] Figure 6 It is a front view structural diagram of the utility model adapted for short circuit;

[0036] Figure 7 This is a front view structural diagram of the adaptable elbow of the utility model;

[0037] Figure 8 This is a schematic diagram of the front cross-sectional structure of the utility model of a voltage regulator body and a separate filter;

[0038] Fig. 9 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0039] Fig.10 yes Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0040] Markings in the figure: 1. regulator body; 2. first diaphragm assembly; 3. air inlet pipe; 4. air outlet pipe; 5. shut-off valve; 51. shut-off valve seat; 6. side chamber; 7. second diaphragm assembly; 71. lower diaphragm cover; 72. upper diaphragm cover; 73. second diaphragm; 74. upper chamber of second diaphragm; 75. lower chamber of second diaphragm; 76. vent hole; 77. vent valve core; 78. breathing valve; 79. main adjustment spring; 80. adjusting ring; 8. support frame; 9. first diaphragm; 10. valve stem; 11. valve port; 12. valve core; 13. fairing sleeve; 14. extension pipe; 15. filter element; 16. filter element cover; 17. side cover; 18. valve seat; 19. pressure gauge; 20. inlet ball valve; 21. outlet ball valve. DETAILED DESCRIPTION

[0041] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0042] 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.

[0043] It should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 a limitation on the utility model.

[0044] 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.

[0045] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0046] The utility model embodiment provides a high adaptability building voltage regulator, referring to Figures 1 to 10 , including a pressure regulator body 1 provided with an air inlet pipe 3 and an air outlet pipe 4, wherein a valve port 11 regulated by a valve stem 10 is provided in the pressure regulator body 1, wherein the valve stem 10 is located on the air inlet side of the valve port 11 and is provided with a first diaphragm assembly 2, wherein the valve stem 10 is a hollow structure, and a second diaphragm assembly 7 is also mounted on the valve stem 10, wherein a second diaphragm lower cavity 75 of the second diaphragm assembly 7 is connected to an exhaust side of the valve port 11 through the hollow valve stem 10.

[0047] Specifically, the valve stem 10 passes through the first diaphragm assembly 2; the second diaphragm assembly 7 is located at the upper part of the pressure regulator body 1; one side of the lower part of the pressure regulator body 1 is connected to the air inlet pipe 3, and the other side of the lower part of the pressure regulator body 1 is connected to the air outlet pipe 4; a pressure gauge 19 is installed on one end of the pressure regulator body 1 located on the air inlet pipe 3, and the pressure gauge 19 is used to detect the pressure of the gas entering the air inlet pipe 3; an inlet ball valve 20 is installed on the air inlet pipe 3, and an outlet ball valve 21 is installed on the air outlet pipe 4.

[0048] Reference Figure 1 A filter assembly is installed at the air inlet pipe 3 of the voltage regulator body 1, and the filter assembly includes a filter element 15 and a filter element cover 16. The filter element 15 is installed in the air inlet pipe 3 of the voltage regulator body 1 through the filter element cover 16. The impurities in the gas entering from the air inlet pipe 3 are filtered by the filter element 15 to prevent the impurities contained in the gas from scouring the structure inside the voltage regulator body 1, affecting the sealing performance, or causing the blockage of the pipeline; the filter element 15 is installed in the air inlet pipe 3 through the filter element cover 16. The setting of the filter element cover 16 makes it convenient to take out the filter element 15 for cleaning or replacement.

[0049] Reference Figures 6 to 8, the voltage regulator body 1 adopts a split design, and an anti-shear boss structure can be provided at the mounting interface of the voltage regulator body 1 located at one end of the inlet pipe 3 close to the outlet pipe 4, and reinforcing ribs are arranged around it. The voltage regulator body 1 is located at the mounting interface of the outlet pipe 4 close to the inlet pipe 3, and a tensile reinforcement groove structure matching the anti-shear boss structure can be provided. By designing the reinforcement structure at the interface position, it is ensured that after the spacing between the inlet pipe 3 and the outlet pipe 4 is lengthened, each interface still has sufficient tensile and shear strength; the key dimensions affecting the installation of the building voltage regulator are: the center distance between the inlet pipe 3 and the outlet pipe 4. The center distances of the inlet and outlet valves of the existing voltage regulator products of various manufacturers are not uniform, usually between 165mm and 300mm, and may be arbitrary values, which brings great difficulties to users in replacing new products. For example, when users replace the supply After the negotiation, if the center distance of the old product of the old supplier is A, the supporting pipeline is laid according to the center distance A, then the product of the new supplier with a center distance of B cannot be directly installed on the existing pipeline, and the laid pipeline needs to be modified, which is not only costly and time-consuming, but also inconvenient and uneconomical; therefore, the utility model adopts a modular design and a split design for the voltage regulator body 1. It can change the distance between the air inlet pipe 3 and the air outlet pipe 4 according to the user's required installation center distance size requirements through adapting short circuits or adapting elbows, and can achieve high adaptability of installation by cooperating with corresponding connecting parts, which is convenient and flexible to change the installation size, covering the interchangeability of most products in the prior art; specifically, according to the situation, the installation spacing above 300mm can be extended by adapting elbows, and the sizes within 300mm can be matched by adapting short circuits.

[0050] Reference Figure 8 At the beginning of ventilation, since there is no air pressure at the rear end of the valve port 11 in the pressure regulator body 1, the valve stem 10 is pushed downward under the thrust of the second diaphragm assembly 7, so that a certain initial opening is formed at the valve port 11. Therefore, the air pressure P1 can enter the exhaust side of the valve port 11 through the initial opening, and then lead to the downstream pipeline through the outlet pipe 4. As the air pressure in the downstream pipeline gradually rises, when it reaches the preset value of P2, the internal balance of the pressure regulator is achieved.

[0051] Reference Figure 1 and Figure 8 In this embodiment, the first diaphragm assembly 2 includes a first diaphragm 9 , which is installed in the voltage regulator body 1 through a supporting frame 8 , and the middle part of the first diaphragm 9 is connected to the valve stem 10 .

[0052] Specifically, the support frame 8 is arranged in a cylindrical frame type, and four columns are provided on its edge, and there is a spacing between adjacent columns; the top of the support frame 8 is connected to the edge of the first diaphragm 9 through a pressure plate, and a through groove is opened on the top of the support frame 8, so that the air pressure P1 can generate an upward pneumatic thrust on the first diaphragm 9 through the through groove, and a through hole is reserved in the middle of the support frame 8 for the valve stem 10 to slide through, and the bottom of the support frame 8 matches the top of the valve seat 18 of the valve port 11; the gas enters the middle area of ​​the support frame 8 after being purified, and then the gas enters the exhaust side of the valve port 11 through the initial opening at the valve port 11.

[0053] Reference Figure 1 and Figure 5 In this embodiment, a shut-off valve 5 is installed on the inlet flow passage of the voltage regulator body 1.

[0054] Specifically, the shut-off valve 5 adopts the existing design, which will not be elaborated herein; the shut-off valve 5 includes a shut-off valve seat 51 installed in the pressure regulator body 1; the pressure regulator body 1 is provided with a side cavity 6 on the side away from the shut-off valve 5, which connects the shut-off valve seat 51 with the middle area of ​​the support frame 8, and a side cover 17 is installed on the side cavity 6, and the side cavity 6 is sealed by the side cover 17 to facilitate buffering of the gas in the side cavity 6.

[0055] The gas P1 from the upstream pipeline enters the pressure regulator body 1 through the air inlet pipe 3. After being purified, the gas first passes through the cut-off part of the cut-off valve 5 and then enters the side chamber 6 through the cut-off valve seat 51 for buffering, and then enters the middle area of ​​the support frame 8. Through the design of this special air path structure, the pressure regulator is provided with space conditions in front of the cut-off valve seat 51, ensuring that the cut-off part can provide sufficient safety protection for the pressure regulating part of the second diaphragm assembly 7. At the same time, it provides sufficient buffer volume for the P1 gas pressure before pressure regulation. The flow rate of P1 gas will surge after the pressure is reduced in the pressure regulating part of the second diaphragm assembly 7. If the gas source does not have enough buffer, it is very easy to fluctuate due to supply mismatch under the subsequent high-flow rate P2 pull, and the buffer volume provided by the special air path structure solves this problem.

[0056] Reference Figure 1 and Fig.10 In this embodiment, the valve port 11 includes a valve core 12 installed on the valve stem 10 and a valve seat 18 capable of cooperating with the valve core 12 .

[0057] Specifically, the valve pad at the top of the valve core 12 can contact the bottom of the valve seat 18 to form a sealing pair.

[0058] Among them, refer to Figure 1 and Fig.10 In this embodiment, the bottom of the valve stem 10 is connected to an extension pipe 14 extending into the air outlet pipe 4.

[0059] Reference Figure 1 and Fig.10 In this embodiment, the valve core 12 is sleeved on the top of the extension tube 14.

[0060] Specifically, a fairing sleeve 13 is installed at the upper inner part of the air outlet pipe 4, and the bottom of the valve stem 10 is connected to an extension pipe 14 extending to the bottom of the fairing sleeve 13; the extension pipe 14 is hollow inside; the top of the extension pipe 14 is installed on the outer wall of the bottom of the valve stem 10, and the valve core 12 is arranged in an annular shape and is sealed and installed at the top of the extension pipe 14.

[0061] Reference Figure 1 , Figure 8 and Fig. 9 In this embodiment, the second diaphragm assembly 7 includes a lower diaphragm cover 71 and an upper diaphragm cover 72 installed on the upper part of the pressure regulator body 1, and a second diaphragm 73 is installed between the lower diaphragm cover 71 and the upper diaphragm cover 72. The second diaphragm 73 divides the cavity surrounded by the lower diaphragm cover 71 and the upper diaphragm cover 72 into a second diaphragm upper cavity 74 and a second diaphragm lower cavity 75. The second diaphragm 73 is provided with a relief hole 76 connecting the second diaphragm upper cavity 74 and the second diaphragm lower cavity 75, and the valve stem 10 is installed with a relief valve core 77 for sealing the relief hole 76.

[0062] Among them, refer to Fig. 9 In this embodiment, a guide rod extending to the second diaphragm upper cavity 74 is vertically installed on the top of the relief valve core 77, and there is a gap between the guide rod and the inner wall of the relief hole 76.

[0063] Reference Fig. 9 In this embodiment, the relief hole 76 and the relief valve core 77 are arranged in a conical seal.

[0064] Reference Figure 1 and Figure 8 In this embodiment, a breathing valve 78 is installed on the upper membrane cover 72, which can be automatically opened and closed to keep the pressure difference between the second diaphragm upper cavity 74 and the outside air within the allowable value range.

[0065] Specifically, the lower diaphragm cover 71 and the upper diaphragm cover 72 can be connected by bolts; the upper part of the relief valve core 77 contacts the bottom of the relief hole 76 to form a sealing pair; specifically, at the beginning of ventilation, the upper part of the relief valve core 77 contacts the bottom of the relief hole 76, and is specifically arranged in a conical seal; an adjusting ring 80 is installed on the upper inner part of the upper diaphragm cover 72, and a main adjusting spring 79 is installed between the adjusting ring 80 and the second diaphragm 73, and the thrust of the main adjusting spring 79 can be adjusted by the adjusting ring 80.

[0066] The relief valve core 77 and the relief hole 76 operate as follows: when the downstream pipeline air pressure continues to increase, the pressure in the second diaphragm lower chamber 75 continues to increase and exceeds the critical value, causing the second diaphragm 73 to move upward. When the second diaphragm 73 drives the valve stem 10 to move upward to the maximum stroke (that is, when the valve core 12 is in contact with the valve seat 18, and in this state, the purpose of reducing the P2 air pressure can also be achieved), the valve stem 10 cannot continue to move upward. At this time, the second diaphragm lower chamber 75 acts on the second diaphragm 73 to generate an upward force that continues to drive the second diaphragm 73 to move upward, causing the relief hole 76 to separate from the relief valve core 77, so that the second diaphragm lower chamber 75 and the second diaphragm upper chamber 74 pass through the relief hole 76. A passage is formed between the second diaphragm lower chamber 75 and the guide rod, and the gas pressure of the second diaphragm lower chamber 75 escapes into the second diaphragm upper chamber 74 to relieve the upward force on the second diaphragm 73 caused by the gas pressure of the second diaphragm lower chamber 75. The breathing valve 78 senses that the pressure difference between the second diaphragm upper chamber 74 and the external air exceeds the allowable value range, and automatically opens to release the pressure in the second diaphragm upper chamber 74 and relieve the pressure in the second diaphragm lower chamber 75, thereby avoiding excessive pressure difference between the second diaphragm upper chamber 74 and the second diaphragm lower chamber 75, which may cause the second diaphragm 73 to rupture. When the air pressure in the downstream pipeline continues to rise and exceeds the critical value, the passage of the inlet flow channel of the pressure regulator body 1 can be directly cut off by the cut-off valve 5.

[0067] In the process of supplying gas to the downstream through the exhaust side of the valve port 11 after the pressure regulation of the pressure regulator of the utility model, the gas flow will be blocked by the valve core 12 and will show a divergent flow state. This flow state is very likely to cause the back pressure fluctuation. Figure 8 , the solid line with the arrow pointing downward represents the state of the gas flowing downstream after passing through the exhaust side of the valve port 11. It can be seen that the airflow is divergent after being blocked by the valve core 12. After the straightening sleeve 13 is set in the upper part of the outlet pipe 4, the divergent airflow will be affected by the flow limiting effect of the straightening sleeve 13 and will tend to be stable, and finally flow downward in a straight line; the air pressure in the divergent flow state area is extremely unstable. If the feedback signal of the pressure regulator is obtained from this area, the second diaphragm 73 will sense the unstable air pressure, thereby breaking the balance between the second diaphragm 73 and the main adjustment spring 79, resulting in the outlet pressure P2 being in a fluctuating state. Therefore, in conjunction with the straightening sleeve 13, the rectified air pressure is fed back to the second diaphragm 73 through the extension tube 14 (see specifically Figure 8 The middle arrow indicates an upward dotted line, which is the path for the extension tube 14 to feed back the rectified air pressure to the second diaphragm 73). In summary, the rectifier sleeve 13 and the extension tube 14 can ensure that the air pressure sensed by the second diaphragm 73 is the rectified stable air pressure, thereby ensuring the stability of the voltage stabilization performance of the voltage regulator.

[0068] Working principle: The gas P1 from the upstream pipeline enters the filter element 15 through the air inlet pipe 3. The gas penetrates through the outer wall of the filter element 15 into the hollow area and blocks impurities. After being purified by the filter element 15, the gas enters the regulator body 1, passes through the cut-off part of the cut-off valve 5, and then enters the side cavity 6 through the cut-off valve seat 51 for buffering, and then enters the middle area of ​​the carrier 8. The air pressure P1 generates an upward pneumatic thrust on the first diaphragm 9, and at the same time passes downward through the initial opening of the valve port 11 to enter the exhaust side of the valve port 11, and then flows to the downstream pipeline. As the air pressure in the downstream pipeline gradually rises, when it reaches the preset value of P2, two balances are achieved inside the pressure regulator:

[0069] (1) Balance of P1: The upward thrust of P1 on the first diaphragm 9 and the downward thrust of P1 on the valve core 12 are balanced. This balance effectively eliminates the thrust effect of P1 on the valve core 12. When P1 changes, the pressure regulator can also achieve dynamic balance under the influence of this balance and will not fluctuate due to changes in P1. This balance provides better adaptability to the pressure range of the pressure regulator, while the lever-type structure of the prior art will cause P2 pressure fluctuations when P1 pressure changes.

[0070] (2) Balance of P2: The upward thrust of P2 on the lower chamber 75 of the second diaphragm and the downward thrust of the main regulating spring 79 are balanced. This balance can control the height of the valve core 12 according to the downstream gas demand, so as to achieve the purpose of controlling the opening between the valve core 12 and the valve seat 18, so that the outlet pressure P2 can be output stably.

[0071] When the downstream pressure increases due to unexpected factors and exceeds the preset value of P2, the upward thrust of P2 on the second diaphragm 73 increases, and pushes the second diaphragm 73 to move upward. At the same time, the valve core 12 is driven to move upward synchronously through the valve stem 10, thereby reducing the opening between the valve core 12 and the valve seat 18 and reducing the ventilation volume, so as to achieve the purpose of reducing the P2 air pressure.

[0072] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0073] 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 highly adaptable building voltage regulator, characterized in that: The invention comprises a pressure regulator body (1) provided with an air inlet pipe (3) and an air outlet pipe (4), wherein a valve port (11) regulated by a valve stem (10) is provided in the pressure regulator body (1), wherein the valve stem (10) is provided with a first diaphragm assembly (2) on the air inlet side of the valve port (11), wherein the valve stem (10) is a hollow structure, and a second diaphragm assembly (7) is also mounted on the valve stem (10), wherein a second diaphragm lower cavity (75) of the second diaphragm assembly (7) is connected to the exhaust side of the valve port (11) through the hollow valve stem (10).

2. The highly adaptable building voltage regulator according to claim 1, characterized in that: The second diaphragm assembly (7) comprises a lower diaphragm cover (71) and an upper diaphragm cover (72) mounted on the upper part of the pressure regulator body (1); a second diaphragm (73) is mounted between the lower diaphragm cover (71) and the upper diaphragm cover (72); the second diaphragm (73) divides the cavity surrounded by the lower diaphragm cover (71) and the upper diaphragm cover (72) into a second diaphragm upper cavity (74) and a second diaphragm lower cavity (75); a relief hole (76) communicating with the second diaphragm upper cavity (74) and the second diaphragm lower cavity (75) is provided on the second diaphragm (73); and a relief valve core (77) for sealing the relief hole (76) is mounted on the valve stem (10).

3. The highly adaptable building voltage regulator according to claim 2, characterized in that: A guide rod extending to the upper cavity (74) of the second diaphragm is vertically mounted on the top of the relief valve core (77), and a gap is provided between the guide rod and the inner wall of the relief hole (76).

4. The highly adaptable building voltage regulator according to claim 3, characterized in that: The relief hole (76) and the relief valve core (77) are arranged in a conical sealing manner.

5. The highly adaptable building voltage regulator according to claim 4, characterized in that: A breathing valve (78) is installed on the upper membrane cover (72).

6. The highly adaptable building voltage regulator according to claim 1, characterized in that: The first diaphragm assembly (2) comprises a first diaphragm (9), the first diaphragm (9) is mounted in the pressure regulator body (1) via a carrier (8), and the middle portion of the first diaphragm (9) is connected to the valve stem (10).

7. The highly adaptable building voltage regulator according to claim 1, characterized in that: A shut-off valve (5) is installed on the inlet flow passage of the pressure regulator body (1).

8. The highly adaptable building voltage regulator according to claim 1, characterized in that: The valve port (11) comprises a valve core (12) mounted on a valve stem (10) and a valve seat (18) capable of cooperating with the valve core (12).

9. The highly adaptable building voltage regulator according to claim 8, characterized in that: The bottom of the valve stem (10) is connected to an extension pipe (14) extending into the air outlet pipe (4).

10. The highly adaptable building voltage regulator according to claim 9, characterized in that: The valve core (12) is sleeved on the top of the extension tube (14).

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