Valve body with waterproof hammer structure

Abstract

The present application relates to the technical field of water hammer prevention structure, and provides a valve body with water hammer prevention structure, which comprises an outer shell, an adjusting valve and an electromagnetic valve, an inner cavity is formed in the outer shell, the inner cavity comprises a water inlet cavity, a water outlet cavity and a transition cavity, the adjusting valve is arranged in the transition cavity and abuts against the end face of the outlet of the water inlet cavity to separate the water inlet cavity and the transition cavity; the adjusting valve comprises a valve core, the valve core communicates the water inlet cavity and the transition cavity, a first flow channel is arranged between the water inlet cavity and the water outlet cavity, and a second flow channel is arranged between the electromagnetic valve and the water outlet cavity; when water is flowing, the water lifts up the adjusting valve, flows into the water outlet cavity from the water inlet cavity through the first flow channel, and flows into the transition cavity through the valve core, the water amount in the transition cavity is adjusted through the electromagnetic valve, and the lifting height of the adjusting valve is changed; the water flowing in the water inlet process can automatically lift up the adjusting valve, the opening height of the adjusting valve is dynamically controlled, the water flow is smoothly transitioned, the water flow impact can be effectively buffered without external structure, and the occurrence of water hammer phenomenon is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of waterproof hammer structures, and more particularly to a valve body with a waterproof hammer structure. Background Technology

[0002] Water hammer refers to the shock phenomenon in pipeline systems where the flow state of fluids (especially water) suddenly changes (such as a valve closing rapidly or a pump stopping abruptly), causing a sharp increase or decrease in local pressure due to the interaction between fluid inertia and pipeline elasticity. This pressure shock wave propagates in the pipeline at the speed of sound, potentially causing pipeline vibration, noise, equipment damage, or even pipeline rupture, severely impacting the safety and service life of the system.

[0003] Currently, common waterproof hammer devices mostly employ mechanical accumulators, slow-closing check valves, or pressure regulating towers. Some devices rely on manual operation or mechanical linkage structures for pressure regulation and release, resulting in slow response speed, low automation, complex structure, and inconvenient maintenance. Especially in situations requiring frequent start-stop or precise control, traditional manual or semi-automatic structures struggle to achieve rapid and accurate pressure buffering and balancing. Summary of the Invention

[0004] In view of the shortcomings and defects of the existing technology, a valve body with a water-resistant hammer structure is provided. In order to achieve the purpose of effectively preventing water hammer, the present invention provides the following technical solution.

[0005] A valve body with a water hammer prevention structure includes an outer shell, a regulating valve, and a solenoid valve. The outer shell forms an inner cavity, which includes an inlet cavity, an outlet cavity, and a transition cavity. The regulating valve is disposed within the transition cavity and abuts against the outlet end face of the inlet cavity, isolating the inlet cavity from the transition cavity. The regulating valve includes a valve core that connects the inlet cavity and the transition cavity. A first flow channel is provided between the inlet cavity and the outlet cavity, and a second flow channel is provided between the solenoid valve and the outlet cavity. When water enters, the water flow lifts the regulating valve, flows from the inlet cavity through the first flow channel into the outlet cavity, and simultaneously flows through the valve core into the transition cavity. The solenoid valve regulates the water volume in the transition cavity, changing the lifting height of the regulating valve.

[0006] Compared with the prior art, the present invention sets up an inlet chamber, an outlet chamber, and a transition chamber inside the outer shell. By setting up a regulating valve, the water flow automatically pushes up the regulating valve during the water inlet process. Furthermore, the water volume in the transition chamber is adjusted in real time by a solenoid valve, and the opening height of the regulating valve is dynamically controlled to achieve a smooth water flow transition. It can effectively buffer the water flow impact without the need for external structures, reducing the occurrence of water hammer. Moreover, the structure has a high degree of integration and a fast response speed.

[0007] Furthermore, the valve core includes a filter element and a filter screen disposed around the filter element. The filter element is in communication with the transition cavity. An insertion port is provided at one end of the filter element near the transition cavity. A guide rod is provided on the outer shell facing the regulating valve. The guide rod is inserted into the filter element through the insertion port. There is a gap between the guide rod and the insertion port. When water enters, water flows from the filter screen into the filter element and flows from the filter element to the transition cavity through the gap.

[0008] Through the above improvements, this application provides an insertion port at the upper end of the filter element and a guide rod on the outer shell, with a gap between the guide rod and the insertion port. This allows for the filtration and guidance of the water flow entering the transition chamber. Furthermore, during the use of the regulating valve, the regulating valve moves relative to the guide rod, which can scrape off the scale adhering to the guide rod, preventing impurities from clogging the valve and ensuring that the gap between the regulating valve's insertion port and the guide rod remains open.

[0009] Furthermore, an elastic plate is provided inside the regulating valve, and a spring is provided at the end of the regulating valve. When the regulating valve is raised, the elastic plate is deformed and the spring is compressed, and the water inlet chamber is connected to the water outlet chamber. After the water inlet stops, the elastic plate and the spring return to their original positions, causing the regulating valve to reset.

[0010] Through the above improvements, by utilizing the deformation of the elastic sheet and the compression recovery characteristics of the spring, the regulating valve can automatically rise under the action of water flow and quickly and reliably reset after the water supply is stopped, ensuring the automatic cyclic operation of the structure and enhancing the self-recovery capability and stability of the system.

[0011] Furthermore, the elastic plate includes a fixed section, an elastic section, and a connecting section. The connecting section is fixedly disposed inside the regulating valve. A mating groove is provided on the inner wall of the outer shell. The fixed section is snapped into the mating groove. The elastic section moves synchronously with the regulating valve.

[0012] Through the above improvements, the elastic plate is designed as a separate piece, and the elastic plate is snapped and fixed to the outer shell. This not only ensures the firm positioning of the elastic plate, but also allows its elastic segment to flexibly follow the movement of the regulating valve, thus improving the coordination and reliability of the movement.

[0013] Furthermore, the fixed section has a limiting protrusion at its end, and the outer shell has a limiting groove, with the limiting protrusion engaging with the limiting groove; the connecting section has a positioning protrusion, and the regulating valve has a positioning groove, with the positioning protrusion engaging with the positioning groove.

[0014] Through the above improvements, the locking of the limiting protrusion with the upper limit groove of the outer shell and the cooperation of the positioning protrusion ring with the positioning groove inside the regulating valve have achieved multi-point precise fixing and limiting of the elastic plate, preventing movement or falling off during operation and improving the overall rigidity and durability of the structure.

[0015] Furthermore, the upper end of the regulating valve is provided with an assembly groove, one end of the spring is snapped into the assembly groove, and the other end abuts against the upper end face of the transition cavity.

[0016] Through the above improvements, by setting a fixing column at one end of the spring component in the assembly slot, the spring component is installed securely and the force is evenly distributed, ensuring a smooth and unbiased reset process for the regulating valve, thus improving the accuracy and consistency during use.

[0017] Furthermore, the upper end of the outer casing is provided with an installation cavity, the solenoid valve is fixedly installed in the installation cavity, and the lower end of the installation cavity is provided with a water inlet. The water inlet connects the installation cavity and the transition cavity. Before water enters, the valve body of the solenoid valve blocks the outlet of the water inlet, and the device is in a closed state. When water enters, the valve body of the solenoid valve disengages from the water inlet, and the solenoid valve drives the water to flow through the water inlet from the transition cavity into the installation cavity and the second flow channel, and finally into the outlet cavity.

[0018] Through the above improvements, the solenoid valve body blocks the inlet before water enters, ensuring that the valve body is completely sealed when not in operation, thus avoiding accidental leakage; after the solenoid valve is energized, the valve body quickly disengages, and the water flow immediately enters the outlet chamber through the second flow channel, resulting in a short response time; the transition chamber and the outlet chamber are connected by the second flow channel controlled by the solenoid valve, preventing high-pressure water from directly impacting the internal components of the solenoid valve and extending the life of the solenoid valve.

[0019] Furthermore, the inlet nozzle has a flow channel inside, the diameter of the flow channel near the mounting cavity is smaller than the diameter of the flow channel near the transition cavity; an oblique flow channel is obliquely arranged between the mounting cavity and the second flow channel, the diameter of the flow channel is larger than the diameter of the oblique flow channel, and the diameter of the second flow channel is larger than the diameter of the oblique flow channel.

[0020] Through the above improvements, the inlet nozzle is equipped with a flow channel. The difference in diameter between the through holes on both sides of the flow channel creates a throttling effect, which can regulate the water flow speed and pressure. At the same time, the diameter of the inclined flow channel is smaller than the diameter of the flow channel and the diameter of the second flow channel, which can also adjust the water flow speed, prevent the water flow speed from being too fast, further prevent water hammer, and extend its service life.

[0021] Furthermore, a fixing sleeve is provided between the regulating valve and the outer shell, and the outer wall of the regulating valve slides in fit with the inner wall of the fixing sleeve; a locking block is provided on the fixing sleeve toward the outer shell, and a corresponding locking groove is provided on the outer shell, and the locking block is engaged with the locking groove.

[0022] Through the above improvements, the sliding fit between the inner wall of the fixed sleeve and the outer wall of the regulating valve significantly reduces friction and wear during the movement of the regulating valve. At the same time, the cooperation between the locking block and the locking groove facilitates the quick installation and accurate positioning of the fixed sleeve, improving the ease of assembly and the guiding accuracy of the structure.

[0023] Furthermore, the outer casing includes an upper end cover and a lower end cover, the upper end cover being fitted to the lower end cover, and the upper end cover and the lower end cover being fixed together by bolts.

[0024] Through the above improvements, the outer casing is divided into an upper cover and a lower end, which facilitates the installation, inspection and replacement of internal parts and reduces maintenance costs; the bolt connection method is firm and reliable, ensuring the sealing performance and overall strength of the outer casing under high-pressure working environment. Attached Figure Description

[0025] Figure 1 A schematic diagram of the overall structure of a valve body with a water hammer prevention structure; Figure 2 This is a cross-sectional structural diagram of a valve body with a water hammer prevention structure (initial state). Figure 3 This is a cross-sectional structural diagram of a valve body with a water hammer prevention structure (inlet state). Figure 4 For a valve body with a water hammer structure Figure 2 A magnified view of the structure at point A.

[0026] The components include: 1. Outer shell; 1.1. Mating groove; 1.2. Limiting groove; 1.3. Locking groove; 1.4. Mounting cavity; 1.5. Upper end cover; 1.6. Lower end; 1.7. Guide rod; 2. Regulating valve; 2.1. Valve core; 2.11. Filter element; 2.12. Filter screen; 2.13. Insertion port; 2.14. Gap; 2.2. Positioning groove; 2.3. Assembly groove; 3. Solenoid valve; 4. Inner cavity; 4.1 Inlet chamber; 4.2 Outlet chamber; 4.3 Transition chamber; 4.4 First flow channel; 4.5 Second flow channel; 4.6 Inclined flow channel; 5. Elastic sheet; 5.1 Fixed section; 5.2 Elastic section; 5.3 Connecting section; 5.4 Limiting protrusion; 5.5 Positioning protrusion; 6. Spring component; 7. Fixed sleeve; 7.1 Locking block; 8. Inlet nozzle; 8.1 Flow channel; 9. Bolt. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] like Figures 1 to 4 The valve body shown includes a water hammer-resistant structure, comprising an outer shell 1, a regulating valve 2, and a solenoid valve 3. An inner cavity 4 is formed within the outer shell 1, comprising an inlet cavity 4.1, an outlet cavity 4.2, and a transition cavity 4.3. The regulating valve 2 is disposed within the transition cavity 4.3, and its end face abuts against the outlet of the inlet cavity 4.1, thus isolating the inlet cavity 4.1 from the transition cavity 4.3. The regulating valve 2 includes a valve core 2.1, which connects the inlet cavity 4.1 and the transition cavity 4.3. A first flow channel 4.4 is provided between the inlet cavity 4.1 and the outlet cavity 4.2, and a second flow channel 4.5 is provided between the solenoid valve 3 and the outlet cavity 4.2. When water enters, the water flow lifts the regulating valve 2, flowing from the inlet cavity 4.1 through the first flow channel 4.4 into the outlet cavity 4.2. Simultaneously, the water flow passes through the valve core 2.1 into the transition cavity 4.3. The solenoid valve 3 regulates the water volume in the transition cavity 4.3, thereby changing the lifting height of the regulating valve 2.

[0030] The valve core 2.1 of the regulating valve 2 includes a filter element 2.11 and a filter screen 2.12 disposed around the filter element 2.11. The filter element 2.11 is connected to the transition chamber 4.3 and can filter and guide the water flow entering the transition chamber 4.3 to prevent impurities from clogging it. The outer shell 1 is provided with a guide rod 1.7 facing the regulating valve 2. The guide rod 1.7 is inserted and fitted into the filter element 2.11. When water enters, the water flow passes through the filter screen 2.12 and enters the filter element 2.11. It then flows towards the transition chamber 4.3 through the guide rod 1.7. The structure of the guide rod 1.7 can adsorb certain impurities when water enters, further improving the filtration effect and ensuring the reliability and durability of the regulating valve 2.

[0031] The valve core 2.1 of the regulating valve 2 includes a filter element 2.11 and a filter screen 2.12 disposed around the filter element 2.11. The filter element 2.11 is connected to the transition chamber 4.3. An insertion port 2.13 is provided at one end of the filter element 2.11 near the transition chamber 4.3. A guide rod 1.7 is provided on the outer shell 1 facing the regulating valve 2. The guide rod 1.7 is inserted into the filter element 2.11 through the insertion port 2.13. There is a gap 2.14 between the guide rod 1.7 and the insertion port 2.13. When water enters, the water flows from the filter screen 2.12 into the filter element 2.11 and flows from the filter element 2.11 to the transition chamber 4.3 through the gap 2.14. The size of the gap 2.14 of the insertion port 2.13 is much smaller than the size of the outlet of the solenoid valve 3, so that a smaller water flow can be used to improve the opening and closing response sensitivity of the solenoid valve 3.

[0032] Meanwhile, by setting an insertion port 2.13 at the upper end of the filter element 2.11 and a guide rod 1.7 on the outer shell 1, with a gap 2.14 between the guide rod 1.7 and the insertion port 2.13, the water flow entering the transition chamber 4.3 can be filtered and guided. During the use of the regulating valve 2, the regulating valve 2 is displaced relative to the guide rod 1.7, which can scrape off the scale adhering to the guide rod 1.7 and prevent impurities from clogging it, so that the gap 2.14 between the insertion port 2.13 of the regulating valve 2 and the guide rod 1.7 always remains open.

[0033] An elastic plate 5 is installed inside the regulating valve 2, and a spring 6 is installed at the end of the regulating valve 2. When the regulating valve 2 is raised, the elastic plate 5 is deformed, and the spring 6 is compressed, connecting the water inlet chamber 4.1 to the water outlet chamber 4.2. After the water supply stops, the elastic plate 5 and the spring 6 return to their original positions, causing the regulating valve 2 to reset. By utilizing the deformation characteristics of the elastic plate 5 and the compression recovery characteristics of the spring 6, the regulating valve 2 can automatically rise under the action of water flow and quickly and reliably reset after the water supply stops, ensuring the automatic cyclic operation of the structure and enhancing the self-recovery capability and stability of the system.

[0034] The elastic plate 5 includes a fixed section 5.1, an elastic section 5.2, and a connecting section 5.3. The connecting section 5.3 is fixedly installed inside the regulating valve 2. A mating groove 1.1 is provided on the inner wall of the outer shell 1, and the fixed section 5.1 is snapped into the mating groove 1.1. The elastic section 5.2 moves synchronously with the regulating valve 2. The elastic plate 5 is designed as a separate piece, and the elastic plate 5 is snapped into and fixed to the outer shell 1, which not only ensures the firm positioning of the elastic plate 5, but also allows its elastic section 5.2 to flexibly follow the movement of the regulating valve 2, thereby improving the coordination and reliability of the movement.

[0035] The fixed end is provided with a limiting protrusion 5.4, and the outer shell 1 is provided with a limiting groove 1.2. The limiting protrusion 5.4 is snapped into the limiting groove 1.2. The connecting section 5.3 is provided with a positioning protrusion 5.5, and the regulating valve 2 is provided with a positioning groove 2.2. The positioning protrusion 5.5 is snapped into the positioning groove 2.2. Through the snapping of the limiting protrusion 5.4 with the upper limit groove 1.2 of the outer shell 1, and the cooperation of the positioning protrusion 5.5 with the positioning groove 2.2 in the regulating valve 2, the elastic sheet 5 is precisely fixed and limited at multiple points, preventing movement or falling off during operation, and improving the overall rigidity and durability of the structure.

[0036] The upper end of the regulating valve 2 is provided with an assembly groove 2.3. One end of the spring 6 is snapped into the assembly groove 2.3, and the other end abuts against the upper end face of the transition cavity 4.3. By providing an assembly groove 2.3 on the regulating valve 2, the assembly groove 2.3 fixes one end of the spring 6, making the spring 6 installed firmly and the force evenly distributed. This ensures that the resetting process of the regulating valve 2 is smooth and without deviation, improving the accuracy and consistency during use.

[0037] The upper end of the outer casing 1 is provided with a mounting cavity 1.4, and the solenoid valve 3 is fixedly installed in the mounting cavity 1.4. The lower end of the mounting cavity 1.4 is provided with a water inlet 8, which connects the mounting cavity 1.4 and the transition cavity 4.3. The transition cavity 4.3 and the outlet cavity 4.2 are connected by a second flow channel 4.5 controlled by the solenoid valve 3, which avoids high-pressure water directly impacting the internal components of the solenoid valve 3 and extends the life of the solenoid valve 3. Before water enters, the valve body of the solenoid valve 3 blocks the water inlet 8 to ensure that the valve body is completely sealed when not in operation, thus avoiding accidental leakage. When water enters, the valve body of the solenoid valve 3 disengages from the water inlet 8, and the solenoid valve 3 drives the water to enter the mounting cavity 1.4 and the second flow channel 4.5 from the transition cavity 4.3 through the water inlet 8, and finally enters the outlet cavity 4.2. After the solenoid valve 3 is energized, the valve body quickly disengages, and the water immediately enters the outlet cavity 4.2 through the second flow channel 4.5, resulting in a short response time.

[0038] The inlet nozzle 8 has a flow channel 8.1 inside. The diameter of the flow channel 8.1 near the mounting cavity 1.4 is smaller than the diameter near the transition cavity 4.3. The difference in diameter between the through holes on both sides of the flow channel 8.1 creates a throttling effect, which can regulate the water flow speed and pressure. An inclined flow channel 4.6 is obliquely arranged between the mounting cavity 1.4 and the second flow channel 4.5. The diameter of the flow channel 8.1 is larger than the diameter of the inclined flow channel 4.6, and the diameter of the second flow channel 4.5 is larger than the diameter of the inclined flow channel 4.6. This can also adjust the water flow speed, prevent the water flow speed from being too fast, further prevent water hammer, and extend its service life.

[0039] A fixing sleeve 7 is provided between the regulating valve 2 and the outer shell 1. The outer wall of the regulating valve 2 slides with the inner wall of the fixing sleeve 7, which significantly reduces the friction and wear of the regulating valve 2 during movement. A locking block 7.1 is provided on the fixing sleeve 7 towards the outer shell 1, and a corresponding locking groove 1.3 is provided on the outer shell 1. The locking block 7.1 and the locking groove 1.3 are engaged, which facilitates the quick installation and accurate positioning of the fixing sleeve 7, and improves the convenience of assembly and the guiding accuracy of the structure.

[0040] The outer casing 1 includes an upper end cover 1.5 and a lower end cover 1.6. The upper end cover 1.5 and the lower end cover 1.6 fit together, which facilitates the installation, inspection and replacement of internal parts and reduces maintenance costs. The upper end cover 1.5 and the lower end cover 1.6 are fixed together by bolts 9. The bolt connection method is firm and reliable, ensuring the sealing performance and overall strength of the outer casing 1 under high pressure working environment.

[0041] During the water intake process, the water flow automatically lifts the regulating valve 2 and enters the outlet chamber 4.2 from the inlet chamber 4.1 through the first flow channel 4.4. At the same time, the water flow also enters the filter element 2.11 through the filter screen 2.12, and then flows into the transition chamber 4.3 through the filter element 2.11. This changes the water volume in the transition chamber 4.3, thereby dynamically controlling the lifting height of the regulating valve 2. This completely eliminates the need for the traditional manual operating lever and achieves fully automatic water hammer regulation.

[0042] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A valve body with a water hammer prevention structure, characterized in that: The device includes an outer casing (1), a regulating valve (2), and a solenoid valve (3). An inner cavity (4) is formed within the outer casing (1). The inner cavity (4) includes an inlet cavity (4.1), an outlet cavity (4.2), and a transition cavity (4.3). The regulating valve (2) is disposed within the transition cavity (4.3), and the regulating valve (2) abuts against the end face of the outlet of the inlet cavity (4.1), thus isolating the inlet cavity (4.1) from the transition cavity (4.3). The regulating valve (2) includes a valve core (2.1), which connects the inlet cavity (4.1) and the transition cavity. (4.3) A first flow channel (4.4) is provided between the water inlet chamber (4.1) and the water outlet chamber (4.2), and a second flow channel (4.5) is provided between the solenoid valve (3) and the water outlet chamber (4.2). When water is introduced, the water flow pushes up the regulating valve (2) and enters the water outlet chamber (4.2) from the water inlet chamber (4.1) through the first flow channel (4.4). At the same time, the water flow enters the transition chamber (4.3) through the valve core (2.1). The water volume in the transition chamber (4.3) is adjusted by the solenoid valve (3), thereby changing the lifting height of the regulating valve (2).

2. The valve body with a water hammer prevention structure according to claim 1, characterized in that: The valve core (2.1) includes a filter element (2.11) and a filter screen (2.12) disposed around the filter element (2.11). The filter element (2.11) is connected to the transition cavity (4.3). An insertion port (2.13) is provided at one end of the filter element (2.11) near the transition cavity (4.3). A guide rod (1.7) is provided on the outer shell (1) facing the regulating valve (2). The guide rod (1.7) is inserted into the filter element (2.11) through the insertion port (2.13). There is a gap (2.14) between the guide rod (1.7) and the insertion port (2.13). When water enters, the water flows from the filter screen (2.12) into the filter element (2.11) and flows from the filter element (2.11) to the transition cavity (4.3) through the gap (2.14).

3. The valve body with a water hammer prevention structure according to claim 1, characterized in that: The regulating valve (2) is provided with an elastic plate (5) and a spring (6) is provided at the end of the regulating valve (2). When the regulating valve (2) is lifted, the elastic plate (5) is deformed and the spring (6) is compressed. The water inlet chamber (4.1) is connected to the water outlet chamber (4.2). After the water inlet stops, the elastic plate (5) and the spring (6) return to their original positions, which drives the regulating valve (2) to reset.

4. A valve body with a water hammer prevention structure according to claim 3, characterized in that: The elastic plate (5) includes a fixed section (5.1), an elastic section (5.2), and a connecting section (5.3). The connecting section (5.3) is fixedly disposed inside the regulating valve (2). A mating groove (1.1) is provided on the inner wall of the outer shell (1). The fixed section (5.1) is snapped into the mating groove (1.1). The elastic section (5.2) moves synchronously with the regulating valve (2).

5. A valve body with a water hammer prevention structure according to claim 4, characterized in that: The fixed section (5.1) has a limiting protrusion (5.4) at its end, and the outer shell (1) has a limiting groove (1.2). The limiting protrusion (5.4) is snapped into the limiting groove (1.2). The connecting section (5.3) has a positioning protrusion (5.5), and the regulating valve (2) has a positioning groove (2.2). The positioning protrusion (5.5) is snapped into the positioning groove (2.2).

6. A valve body with a water hammer prevention structure according to claim 3, characterized in that: The regulating valve (2) has an assembly groove (2.3) at its upper end. One end of the spring (6) is engaged in the assembly groove (2.3), and the other end abuts against the upper surface of the transition cavity (4.3).

7. A valve body with a water hammer prevention structure according to claim 1, characterized in that: The upper end of the outer shell (1) is provided with an installation cavity (1.4), and the solenoid valve (3) is fixedly installed in the installation cavity (1.4). The lower end of the installation cavity (1.4) is provided with a water inlet (8). The water inlet (8) connects the installation cavity (1.4) and the transition cavity (4.3). Before water enters, the valve body of the solenoid valve (3) blocks the outlet of the water inlet (8), and the device is in a closed state. When water enters, the valve body of the solenoid valve (3) disengages from the water inlet (8), and the solenoid valve (3) drives the water to enter the installation cavity (1.4) and the second flow channel (4.5) from the transition cavity (4.3) through the water inlet (8), and finally enters the outlet cavity (4.2).

8. A valve body with a water hammer prevention structure according to claim 7, characterized in that: The inlet nozzle (8) has a flow channel (8.1) inside. The diameter of the flow channel (8.1) near the mounting cavity (1.4) is smaller than the diameter near the transition cavity (4.3). An oblique flow channel (4.6) is obliquely arranged between the mounting cavity (1.4) and the second flow channel (4.5). The diameter of the flow channel (8.1) is larger than the diameter of the oblique flow channel (4.6), and the diameter of the second flow channel (4.5) is larger than the diameter of the oblique flow channel (4.6).

9. A valve body with a water hammer prevention structure according to claim 1, characterized in that: A fixing sleeve (7) is provided between the regulating valve (2) and the outer shell (1), and the outer wall of the regulating valve (2) slides in cooperation with the inner wall of the fixing sleeve (7); a locking block (7.1) is provided on the fixing sleeve (7) towards the outer shell (1), and a corresponding locking groove (1.3) is provided on the outer shell (1), and the locking block (7.1) is engaged with the locking groove (1.3).

10. A valve body with a water hammer prevention structure according to claim 1, characterized in that: The outer casing (1) includes an upper end cover (1.5) and a lower end cover (1.6), the upper end cover (1.5) and the lower end cover (1.6) are fitted together, and the upper end cover (1.5) and the lower end cover (1.6) are fixed together by bolts (9).

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