A pressure regulating device

Abstract

The present application relates to the technical field of fluid delivery, and particularly relates to a pressure regulating device. The pressure regulating device provided by the present application comprises a mounting seat, a valve rod and a valve core. The mounting seat is provided with a pressure regulating cavity and a bypass hole. One end of the pressure regulating cavity is used for being connected to a main pipeline. The valve rod and the valve core are arranged in the pressure regulating cavity. The valve core and the pressure regulating cavity surround to form a pressure regulating hole. The two ends of the pressure regulating hole are respectively connected to the main pipeline and the bypass hole. When the inlet pressure of the main pipeline is greater than the use pressure, part of the fluid flows out through the pressure regulating hole and the bypass hole in turn, so as to keep the pressure of the use end of the main pipeline in the set range. The valve rod can drive the valve core to move along the axis direction of the pressure regulating cavity relative to the mounting seat, so as to change the bypass flow and adapt to the pressure regulating demand of the main pipeline under different conditions. The valve core can adaptively float along the axis direction of the pressure regulating cavity relative to the valve rod according to the fluctuation of the pressure in the main pipeline, so as to automatically adapt to the pressure in the main pipeline and protect the main pipeline under high pressure.

Description

Technical Field

[0001] This invention relates to the field of fluid transport technology, and more specifically to a pressure regulating device. Background Technology

[0002] In the fluid transportation industry, pressure regulating structures are installed on pipelines to ensure that the pressure at the user end remains within a set range. These pressure regulating structures generally operate on the following principle: a bypass line is installed between the inlet and outlet ends of the pipeline, and a pressure regulating device is installed on the bypass line; when the inlet pressure of the pipeline is greater than the user pressure, some fluid flows out through the bypass line.

[0003] There are two existing structures for pressure regulating devices. Figure 1 and Figure 2 The structures shown represent two existing pressure regulating devices. Figure 1 In the pressure regulating device shown, the core component of the pressure regulating valve is a fixed valve stem. The bypass flow rate is adjusted by adjusting the height of the fixed valve stem, thereby regulating the pressure. Because this solution is a rigid connection, it cannot automatically adapt to sudden changes in pressure. If there are abnormal conditions at the user end (such as fluid pump overload, pipeline rupture, etc.) that cause the pressure to rise, it cannot protect the relevant pipeline components. Figure 2 In the pressure regulating device shown, the core components of the pressure regulating valve are the valve stem, spring, and valve core. By adjusting the valve stem to compress the spring, the valve core is pressed against the bypass hole with a certain pressure. When the inlet pressure of the pipeline is greater than the spring force, the valve opens, and some fluid flows out through the bypass pipeline. This scheme is a flexible connection. When the inlet pressure of the pipeline is close to the spring pressure, the valve core is prone to vibration, which causes obvious pressure fluctuations and increases noise. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing pressure regulating device cannot automatically adapt to the pipeline pressure by using a rigid connection and cannot provide high-pressure protection for the pipeline; while the flexible connection is prone to technical problems such as valve core vibration, obvious pressure fluctuation and high noise.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a pressure regulating device, comprising: a mounting base, a valve stem, and a valve core;

[0006] The mounting base is provided with a pressure regulating chamber and a bypass hole. One end of the pressure regulating chamber is used to connect to the main pipeline. The valve stem and the valve core are arranged sequentially in the pressure regulating chamber along the direction close to the main pipeline. The valve core and the pressure regulating chamber surround to form a pressure regulating hole. The two ends of the pressure regulating hole are respectively connected to the main pipeline and the bypass hole.

[0007] The valve stem can drive the valve core to move relative to the mounting base along the axial direction of the pressure regulating chamber to adjust the cross-sectional area of ​​the pressure regulating orifice; the valve core can float relative to the valve stem along the axial direction of the pressure regulating chamber.

[0008] According to one embodiment of the present invention, it further includes an elastic element disposed in the pressure regulating chamber, one end of the elastic element acting on the mounting base or the valve stem, and the other end of the elastic element acting on the valve core.

[0009] According to one embodiment of the present invention, a first elastic element working surface is provided in the pressure regulating cavity, and the two ends of the elastic element abut against the first elastic element working surface and the valve core, respectively;

[0010] Alternatively, the valve stem may be provided with a second elastic element working surface, and the two ends of the elastic element abut against the second elastic element working surface and the valve core, respectively.

[0011] According to one embodiment of the present invention, the elastic element is a compression spring or a disc spring.

[0012] According to one embodiment of the present invention, the elastic element is sleeved on the valve stem.

[0013] According to one embodiment of the present invention, a first slot is provided at one end of the valve core near the valve stem, one end of the valve stem is inserted into the first slot, and the elastic element is provided between the bottom of the first slot and the valve stem;

[0014] Alternatively, a second slot may be provided at one end of the valve stem near the valve core, one end of the valve core may be inserted into the second slot, and the elastic element may be provided between the bottom of the second slot and the valve core.

[0015] According to one embodiment of the present invention, a limiting rod is also included;

[0016] The valve stem is provided with a limiting elongated hole, the limiting rod is fixed to the valve core, and the limiting rod passes through the limiting elongated hole and can float within the limiting elongated hole along the length direction of the limiting elongated hole.

[0017] According to one embodiment of the present invention, a first slot is provided at one end of the valve core near the valve stem, and one end of the valve stem is inserted into the first slot; a mounting through hole is provided on each of the opposite sides of the first slot, and the two ends of the limiting rod are respectively inserted into the two mounting through holes.

[0018] According to one embodiment of the present invention, the mounting base is provided with a main pipe connection channel, and the main pipe connection channel is disposed on the main pipe;

[0019] One end of the pressure regulating chamber is connected between the inlet and outlet ends of the main pipeline connection channel.

[0020] According to one embodiment of the present invention, the two ends of the bypass hole are respectively connected to the pressure regulating hole and the inlet end of the main pipeline connection channel.

[0021] The beneficial effects of this invention are:

[0022] The pressure regulating device provided in this embodiment of the invention includes a mounting base, a valve stem, and a valve core. The mounting base is provided with a pressure regulating chamber and a bypass hole. One end of the pressure regulating chamber is connected to a main pipeline. The valve stem and valve core are sequentially arranged within the pressure regulating chamber along the direction close to the main pipeline. The valve core and the pressure regulating chamber together form a pressure regulating hole, with both ends connected to the main pipeline and the bypass hole, respectively. The valve stem can drive the valve core to move relative to the mounting base along the axial direction of the pressure regulating chamber to adjust the cross-sectional area of ​​the pressure regulating hole. The valve core can float relative to the valve stem along the axial direction of the pressure regulating chamber. When the pressure at the inlet end of the main pipeline is greater than the pressure at the outlet end, some fluid flows out sequentially through the pressure regulating port and the bypass hole to maintain the pressure at the outlet end of the main pipeline within a set range. The cross-sectional area of ​​the pressure regulating hole can be adjusted by the valve stem and the valve core, thereby changing the bypass flow rate to adapt to the pressure regulation requirements of the main pipeline under different conditions.

[0023] The pressure regulating device provided in this application combines the advantages of both flexible and rigid connections. Specifically, compared to existing flexible connection pressure regulating devices, the pressure regulating device provided in this application maintains the pressure at the outlet end of the main pipeline within the operating range through the pressure regulating hole, avoiding significant pressure fluctuations caused by frequent opening and closing of the bypass pipeline and excessive noise caused by the valve core constantly impacting the mounting seat. Compared to existing rigid connection pressure regulating devices, the valve core in this application can adaptively float relative to the valve stem along the axis of the pressure regulating chamber according to the pressure fluctuations in the main pipeline, thereby automatically adapting to changes in the pressure in the main pipeline and providing high-pressure protection for the main pipeline. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a rigidly connected pressure regulating device in the prior art.

[0026] Figure 2 This is a schematic diagram of a pressure regulating device with flexible connection in the prior art.

[0027] Figure 3 This is a schematic diagram of the internal structure of the pressure regulating device provided in Embodiment 1 of the present invention;

[0028] Figure 4 This is a top view of the pressure regulating device provided in Embodiment 1 of the present invention;

[0029] Figure 5 A schematic diagram of the connection structure between the valve stem and the valve core of the pressure regulating device provided in Embodiment 1 of the present invention when the pressure in the main pipeline is greater than the elastic force of the elastic element;

[0030] Figure 6 A schematic diagram of the connection structure between the valve stem and the valve core of the pressure regulating device provided in Embodiment 1 of the present invention when the pressure in the main pipeline is less than the elastic force of the elastic element;

[0031] Figure 7 for Figure 3 Enlarged view at point A;

[0032] Figure 8 This is a schematic diagram of the internal structure of the pressure regulating device provided in Embodiment 2 of the present invention;

[0033] Figure 9 This is a schematic diagram of the pressure regulating device provided in Embodiment 2 of the present invention when the annular protrusion is detachably connected to the valve stem;

[0034] Figure 10 This is a schematic diagram of the internal structure of a pressure regulating device provided in one embodiment of the present invention (Embodiment 3).

[0035] Figure 11 This is a schematic diagram of the internal structure of a pressure regulating device provided in another embodiment of the present invention.

[0036] icon:

[0037] 100 - Main pipeline;

[0038] 1-Mounting base; 11-Pressure regulating chamber; 111-First elastic element working surface; 12-Bypass hole; 13-Main pipe connection channel; 14-Base; 15-Connecting seat;

[0039] 2-Valve stem; 21-Second elastic element working surface; 22-Second slot; 23-Limiting elongated hole; 24-Annular protrusion;

[0040] 3-Valve core; 31-First slot;

[0041] 4-Pressure regulating hole;

[0042] 5-Elastic component;

[0043] 6-Limit rod;

[0044] 7-Adjusting handle;

[0045] 8-Adjusting nut. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1

[0048] Reference Figure 1 and Figure 2 In existing pressure regulating devices, rigid connections, due to the fixed bypass flow rate after regulation, cannot automatically adapt to pipeline pressure and cannot provide high-pressure protection. Flexible connections, when the pipeline inlet pressure is close to the spring pressure, are prone to valve core vibration, significant pressure fluctuations, and high noise. While the shortcomings of flexible connections can be mitigated by installing a safety valve alongside a rigid connection pressure regulating device, this increases the number of valves in the system and makes the structure more complex.

[0049] Based on this, such as Figure 3 and Figure 4 As shown, this embodiment of the invention provides a pressure regulating device, including: a mounting base 1, a valve stem 2, and a valve core 3; the mounting base 1 is provided with a pressure regulating chamber 11 and a bypass hole 12, one end of the pressure regulating chamber 11 is used to connect to a main pipeline 100; the valve stem 2 and the valve core 3 are arranged sequentially in the pressure regulating chamber 11 along the direction close to the main pipeline 100, and the valve core 3 and the pressure regulating chamber 11 surround to form a pressure regulating hole 4, the two ends of the pressure regulating hole 4 are respectively connected to the main pipeline 100 and the bypass hole 12. In this embodiment, the gap between the outer side wall of the lower end of the valve core 3 and the inner side wall of the lower end of the pressure regulating chamber 11 forms the pressure regulating hole 4; when the valve core 3 moves away from the main pipeline 100, the cross-sectional area of ​​the pressure regulating hole 4 increases, and the flow rate of the fluid flowing through the pressure regulating hole 4 also increases accordingly; when the valve core 3 moves closer to the main pipeline 100, the cross-sectional area of ​​the pressure regulating hole 4 decreases, and the flow rate of the fluid flowing through the pressure regulating hole 4 also decreases accordingly.

[0050] In this application, the valve stem 2 can drive the valve core 3 to move relative to the mounting base 1 along the axial direction of the pressure regulating chamber 11 to adjust the cross-sectional area of ​​the pressure regulating hole 4; the valve core 3 can float relative to the valve stem 2 along the axial direction of the pressure regulating chamber 11.

[0051] Continue to refer to Figure 3 The lower end of the pressure regulating chamber 11 is connected between the inlet and outlet ends of the main pipeline 100. When the pressure at the inlet end of the main pipeline 100 is greater than the pressure at the outlet end, some fluid flows out through the pressure regulating hole 4 and the bypass hole 12 in sequence to keep the pressure at the outlet end of the main pipeline 100 within the set range. The cross-sectional area of ​​the pressure regulating hole 4 can be adjusted by the valve stem 2 and the valve core 3, thereby changing the bypass flow rate to adapt to the pressure regulation requirements of the main pipeline 100 under different conditions. The pressure regulating device provided in this application combines the advantages of both flexible and rigid connections. Specifically, compared to existing flexible connection pressure regulating devices, the pressure regulating device provided in this application maintains the pressure at the outlet end of the main pipeline 100 within the operating range through the pressure regulating hole 4, avoiding the problems of significant pressure fluctuations caused by frequent opening and closing of the bypass pipeline due to valve core 3 vibration, and loud noise caused by the valve core 3 constantly hitting the mounting seat 1. Compared to existing rigid connection pressure regulating devices, the valve core 3 in this application can adaptively float relative to the valve stem 2 along the axial direction of the pressure regulating chamber 11 according to the pressure fluctuations in the main pipeline 100, thereby automatically adapting to the pressure changes in the main pipeline 100 and providing high-pressure protection for the main pipeline 100.

[0052] In this embodiment, the mounting base 1 includes a detachably connected base 14 and a connecting base 15. The base 14 has a first through hole whose lower end connects to the main pipe 100. The connecting base 15 has a hollow structure, and its interior has a second through hole penetrating both its upper and lower ends. The first and second through holes are coaxially arranged, forming a pressure regulating chamber 11. In this embodiment, the lower end of the connecting base 15 is screwed to the upper end of the base 14.

[0053] According to one embodiment of the present invention, the diameter of the second through hole is smaller than that of the first through hole, the upper part of the valve stem 2 is located in the second through hole, the lower part of the valve stem 2 is located in the first through hole, and the valve core 3 is disposed in the first through hole; the outer peripheral surface of the valve stem 2 is in contact with the inner wall surface of the second through hole, and the radial position of the valve stem 2 is restricted by the second through hole.

[0054] Based on the above structure, the pressure regulating device also includes an adjusting handle 7 and an adjusting nut 8 that is linked to the adjusting handle 7; both the adjusting handle 7 and the adjusting nut 8 are rotatably connected to the end of the connecting seat 15 away from the base 14; the end of the valve stem 2 away from the valve core 3 is screwed to the adjusting nut 8. When it is necessary to adjust the bypass flow rate, the adjusting handle 7 is rotated to make the adjusting nut 8 rotate synchronously. The valve stem 2 moves towards or away from the main pipeline 100 as the adjusting nut 8 rotates, thereby driving the valve core 3 to move towards or away from the main pipeline 100, achieving the effect of adjusting the cross-sectional area of ​​the pressure regulating orifice 4, thereby adjusting the flow rate of the fluid flowing through the pressure regulating orifice 4. In this embodiment, the adjusting handle 7 covers the end of the pressure regulating chamber 11 away from the main pipeline 100 to prevent external dust and other substances from entering the pressure regulating chamber 11.

[0055] According to one embodiment of the present invention, a main pipe connection channel 13 is provided on the mounting base 1, and the main pipe connection channel 13 is disposed on the main pipe 100; one end of the pressure regulating chamber 11 is connected between the inlet end and the outlet end of the main pipe connection channel 13. In the above embodiment, when the pressure regulating device is connected to the main pipe 100, the inlet end and the outlet end of the main pipe connection channel 13 are respectively connected to the inlet pipe and the outlet pipe of the main pipe 100. In other embodiments, the main pipe connection channel 13 may not be provided; for example, a through hole is opened in the side wall of the main pipe 100, and the mounting base 1 is detachably fixed to the side wall of the main pipe 100 by means of threaded connection or other means, and the pressure regulating chamber 11 is connected to the through hole in the side wall of the main pipe 100.

[0056] Optionally, the two ends of the bypass hole 12 are connected to the inlet end of the pressure regulating hole 4 and the main pipeline connection channel 13, respectively. The fluid flowing out of the bypass hole 12 can flow back into the main pipeline 100, and the overflowing fluid can be recycled.

[0057] Furthermore, the pressure regulating device provided in this application also includes an elastic element 5 disposed in the pressure regulating chamber 11; in this embodiment, one end of the elastic element 5 acts on the mounting base 1, and the other end of the elastic element 5 acts on the valve core 3.

[0058] Specifically, a first elastic element working surface 111 is provided inside the pressure regulating chamber 11, and the two ends of the elastic element 5 abut against the first elastic element working surface 111 and the valve core 3, respectively. In this embodiment, the first elastic element working surface 111 is provided on the connecting seat 15; specifically, an elastic element slot is provided at the end of the connecting seat 15 near the valve core 3, and the end of the elastic element away from the valve core 3 is inserted into the elastic element slot, and the first elastic element working surface 111 is the bottom surface of the elastic element slot. In other embodiments, the elastic element slot may not be provided, and the first elastic element working surface 111 is the end face of the connecting seat 15 near the valve core 3.

[0059] In this embodiment, the elastic element 5 is a compression spring or a disc spring.

[0060] Based on the above structure, the elastic element 5 is sleeved on the valve stem 2, and the radial displacement of the elastic element 5 in the pressure regulating chamber 11 can be restricted by the valve stem 2.

[0061] The elastic element 5 always applies a spring force to the valve core 3 as it moves towards the main pipeline 100; when the pressure inside the main pipeline 100 exceeds the set value, refer to Figure 5 At this time, the pressure in the main pipeline 100 is greater than the elastic force of the elastic element 5, and the valve core 3 adaptively floats in a direction away from the main pipeline 100, thereby increasing the cross-sectional area of ​​the pressure regulating hole 4. Even without human intervention, the system pressure will drop to a safe range. When the pressure in the main pipeline 100 returns to below the set value, refer to... Figure 6 At this time, the pressure in the main pipeline 100 is less than the elastic force of the elastic element 5, and the valve core 3 can be reset under the elastic force of the elastic element 5.

[0062] Reference Figure 7 The pressure regulating device provided in this application also includes a limiting rod 6; a limiting elongated hole 23 is provided on the valve stem 2, the limiting rod 6 is fixed to the valve core 3, and the limiting rod 6 passes through the limiting elongated hole 23 and can float in the limiting elongated hole 23 along the length direction of the limiting elongated hole 23.

[0063] Continue to refer to Figure 5 and Figure 6 When the pressure in the main pipeline 100 exceeds the set value, the valve core 3 floats away from the main pipeline 100 under the action of the pipeline pressure, and stops when the limit rod 6 presses against the upper end of the limit elongated hole 23; when the pressure in the main pipeline 100 returns to below the set value, the valve core 3 moves towards the main pipeline 100 under the action of the spring force, and stops when the limit rod 6 presses against the lower end of the limit elongated hole 23.

[0064] When it is necessary to adjust the bypass flow rate, rotate the adjusting handle 7. The valve stem 2 moves toward or away from the main pipeline 100. Under the combined action of the limiting elongated hole 23 and the elastic element 5, the valve core 3 moves synchronously with the valve stem 2 toward or away from the main pipeline 100, thereby achieving the effect of adjusting the cross-sectional area of ​​the pressure regulating hole 4.

[0065] In other embodiments, a limiting elongated hole can also be provided on the valve core 3, and the limiting rod 6 can be fixed to the valve stem 2; the principle is the same as described above, and will not be repeated here.

[0066] In this embodiment, a first slot 31 is provided at one end of the valve core 3 near the valve stem 2, and one end of the valve stem 2 is inserted into the first slot 31. A mounting through hole is provided on each of the opposite sides of the first slot 31, and the two ends of the limiting rod 6 are respectively inserted into the two mounting through holes. When the limiting rod 6 is pressed against the lower end of the limiting elongated hole 23, there should be a gap between the bottom of the first slot 31 and the valve stem 2, so that the valve core 3 can float relative to the valve stem 2. As an optional embodiment, the limiting rod 6 can be screwed into at least one mounting through hole, thereby fixing the limiting rod 6 to the valve core 3; in other embodiments, the two ends of the limiting rod 6 protrude from the two mounting through holes respectively, and the protruding portions at both ends are provided with connecting parts such as snap rings and nuts, thereby fixing the limiting rod 6 to the valve core 3; there are various ways to fix the limiting rod 6 and the valve core 3, and no limitation is made here.

[0067] In other embodiments, the first slot 31 may not be provided; for example, the valve stem 2 is provided with a first contact surface, the valve core 3 is provided with a second contact surface that abuts against the first contact surface, and the limiting elongated hole 23 is provided on the first contact surface; one end of the limiting rod 6 is fixed to the second contact surface (the limiting rod 6 and the valve core 3 can be integrally formed), and the other end passes through the limiting elongated hole 23; the part that passes through the limiting elongated hole 23 can be fixed by a nut, washer or snap ring or other connecting parts.

[0068] Example 2

[0069] The pressure regulating device provided in this embodiment has a structure that is basically the same as the pressure regulating device in Embodiment 1, except that:

[0070] Reference Figure 8 In this embodiment, one end of the elastic element 5 acts on the valve stem 2, and the other end of the elastic element 5 acts on the valve core 3. Specifically, the valve stem 2 is provided with a second elastic element working surface 21, and the two ends of the elastic element 5 abut against the second elastic element working surface 21 and the valve core 3, respectively.

[0071] According to one embodiment of the present invention, an annular protrusion 24 surrounding the circumference of the valve stem 2 is provided in the middle of the valve stem 2, and an elastic member 5 is sleeved on the valve stem 2, which is disposed between the annular protrusion 24 and the valve core 3; the working surface 21 of the second elastic member is the end face of the annular protrusion 24 near the valve core 3. In this embodiment, when the valve stem 2 drives the valve core 3 to move, the elastic member 5 can move synchronously with the valve stem 2.

[0072] The annular protrusion 24 can be integrally formed with the valve stem 2, or it can be detachably connected to the valve stem 2. (See reference) Figure 9 , Figure 9 In the embodiment shown, the annular protrusion 24 is screwed to the valve stem 2. Rotating the annular protrusion 24 can move the annular protrusion 24 along the axial direction of the valve stem 2, thereby adjusting the compression of the elastic element 5 to adjust the elastic force applied by the elastic element 5 to the valve core 3.

[0073] The remaining structure of the pressure regulating device provided in this embodiment is the same as that of the pressure regulating device in Embodiment 1, and will not be described again here.

[0074] Example 3

[0075] The pressure regulating device provided in this embodiment has a structure that is basically the same as the pressure regulating device in Embodiment 1, except that:

[0076] Reference Figure 10 and Figure 11 In this embodiment, one end of the elastic element 5 acts on the valve stem 2, and the other end of the elastic element 5 acts on the valve core 3. Specifically, the valve stem 2 is provided with a second elastic element working surface 21, and the two ends of the elastic element 5 abut against the second elastic element working surface 21 and the valve core 3, respectively.

[0077] Figure 10 In the illustrated embodiment, a first slot 31 is provided at one end of the valve core 3 near the valve stem 2, and one end of the valve stem 2 is inserted into the first slot 31. An elastic element 5 is provided between the bottom of the first slot 31 and the valve stem 2. In this embodiment, the working surface 21 of the second elastic element is the end face of the valve stem 2 near the valve core 3.

[0078] Figure 11 In the illustrated embodiment, a second slot 22 is provided at one end of the valve stem 2 near the valve core 3. One end of the valve core 3 is inserted into the second slot 22, and an elastic element 5 is provided between the bottom of the second slot 22 and the valve core 3. In this embodiment, the working surface 21 of the second elastic element is the bottom surface of the second slot 22. An adjusting elongated hole is provided on the valve core 3, and a limiting rod 6 is fixed to the valve stem 2. When the pressure in the main pipeline 100 is less than the elastic force of the elastic element 5, the limiting rod 6 presses against the upper end of the limiting elongated hole under the action of the elastic force. When the pressure in the main pipeline 100 is greater than the elastic force of the elastic element 5, the valve core 3 floats away from the main pipeline 100 under the action of the pipeline pressure until the limiting rod 6 presses against the lower end of the limiting elongated hole 23 and stops.

[0079] The remaining structure of the pressure regulating device provided in this embodiment is the same as that of the pressure regulating device in Embodiment 1, and will not be described again here.

[0080] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0081] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0082] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure regulating device, characterized in that, include: Mounting base (1), valve stem (2) and valve core (3); The mounting base (1) is provided with a pressure regulating chamber (11) and a bypass hole (12). One end of the pressure regulating chamber (11) is used to connect to the main pipeline (100). The valve stem (2) and the valve core (3) are arranged in sequence in the pressure regulating chamber (11) along the direction close to the main pipeline (100). The valve core (3) and the pressure regulating chamber (11) surround to form a pressure regulating hole (4). The two ends of the pressure regulating hole (4) are respectively connected to the main pipeline (100) and the bypass hole (12). The valve stem (2) can drive the valve core (3) to move relative to the mounting base (1) along the axial direction of the pressure regulating chamber (11) to adjust the cross-sectional area of ​​the pressure regulating hole (4); the valve core (3) can float relative to the valve stem (2) along the axial direction of the pressure regulating chamber (11); The pressure regulating device also includes a limiting rod (6). The valve stem (2) is provided with a limiting elongated hole (23), the limiting rod (6) is fixed to the valve core (3), and the limiting rod (6) passes through the limiting elongated hole (23) and can float in the limiting elongated hole (23) along the length direction of the limiting elongated hole (23); The mounting base (1) is provided with a main pipe connection channel (13), and the main pipe connection channel (13) is provided on the main pipe (100); One end of the pressure regulating chamber (11) is connected between the inlet and outlet ends of the main pipeline connection channel (13), and the two ends of the bypass hole (12) are respectively connected to the pressure regulating hole (4) and the inlet end of the main pipeline connection channel (13).

2. The pressure regulating device according to claim 1, characterized in that, It also includes an elastic element (5) disposed in the pressure regulating chamber (11), one end of the elastic element (5) acts on the mounting base (1) or the valve stem (2), and the other end of the elastic element (5) acts on the valve core (3).

3. The pressure regulating device according to claim 2, characterized in that, The pressure regulating chamber (11) is provided with a first elastic element working surface (111), and the two ends of the elastic element (5) abut against the first elastic element working surface (111) and the valve core (3) respectively. Alternatively, the valve stem (2) is provided with a second elastic element working surface (21), and the two ends of the elastic element (5) abut against the second elastic element working surface (21) and the valve core (3) respectively.

4. The pressure regulating device according to claim 2, characterized in that, The elastic element (5) is a compression spring or a disc spring.

5. The pressure regulating device according to claim 4, characterized in that, The elastic element (5) is sleeved on the valve stem (2).

6. The pressure regulating device according to claim 2, characterized in that, The valve core (3) is provided with a first slot (31) at one end near the valve stem (2), and one end of the valve stem (2) is inserted into the first slot (31). The elastic element (5) is provided between the bottom of the first slot (31) and the valve stem (2). Alternatively, a second slot (22) is provided at one end of the valve stem (2) near the valve core (3), one end of the valve core (3) is inserted into the second slot (22), and the elastic element (5) is provided between the bottom of the second slot (22) and the valve core (3).

7. The pressure regulating device according to claim 1, characterized in that, The valve core (3) is provided with a first slot (31) at one end near the valve stem (2), and one end of the valve stem (2) is inserted into the first slot (31); a mounting through hole is provided on each of the opposite sides of the first slot (31), and the two ends of the limiting rod (6) are respectively inserted into the two mounting through holes.

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