Valve body suitable for high-pressure-drop small-flow regulating valve

Abstract

The utility model relates to a valve body suitable for a high-pressure-drop small-flow regulating valve, which belongs to the technical field of regulating valves and comprises a main valve body and an auxiliary valve body, the main valve body is internally provided with a flow reduction component for reducing flow, the main valve body is internally provided with a noise reduction component for reducing noise, and the main valve body is internally provided with a pressure reduction component. The flow descending assembly comprises a convex block fixed to the bottom of the main valve body, a first through hole is formed in the top of the convex block, and a buffer groove is formed in the top of the auxiliary valve body. The valve body suitable for the high-pressure-drop small-flow regulating valve can effectively operate under the high working condition with the pressure intensity difference, can effectively meet the small-flow operation requirement, and can effectively avoid the problems of cavitation and the like caused by large pressure drop, so that the situation that the valve or a downstream pipeline is seriously damaged due to cavitation and the valve cannot be tightly closed is effectively avoided, and the service life of the valve body is prolonged. The service life of the valve is prolonged, noise generated by the valve body of the regulating valve can be effectively reduced, and the practicability of the valve body suitable for the high-pressure-drop small-flow regulating valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a valve body suitable for regulating valves that reduce flow rate under high pressure. Background Technology

[0002] Control valves are used to regulate process parameters such as flow rate, pressure, temperature, and liquid level in industrial automation process control. Based on control signals from the automation system, the valve opening is automatically adjusted to regulate the flow rate, pressure, temperature, and liquid level of the medium.

[0003] Existing control valve bodies generally have large leakage when operating under high pressure differential conditions, making it difficult to meet the requirements of low flow rate operation. They are also prone to cavitation problems when the pressure drop is large, and also generate a lot of noise. Cavitation can seriously damage the valve or downstream pipelines, and in severe cases, it can prevent the valve from closing tightly, thereby reducing the service life of the valve and posing certain safety hazards, thus reducing the practicality of existing control valve bodies. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a valve body suitable for high pressure and low flow rate regulating valve, which has the advantages of meeting the operation requirements of low flow rate and solves the problem of low practicality of existing regulating valve bodies.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objective of meeting the operation requirements of small flow rates, this utility model provides the following technical solution: a valve body suitable for high pressure to reduce small flow rate regulating valve, including a main valve body and a secondary valve body, wherein a flow reduction component for reducing small flow rate is installed inside the main valve body, and a noise reduction component for noise reduction is installed inside the main valve body;

[0008] The flow reduction assembly includes a convex block fixed to the bottom of the main valve body, a first through hole on the top of the convex block, a buffer groove on the top of the secondary valve body, a water inlet on the bottom of the secondary valve body, a sealing ring fixed on the top of the secondary valve body, a water inlet groove on the bottom of the main valve body, a cavity inside the main valve body, a flow limiting plate fixed inside the main valve body, two second through holes on both the left and right sides of the flow limiting plate, an annular cavity inside the main valve body, and a water outlet on the right side of the main valve body.

[0009] Furthermore, the noise reduction component includes a baffle that is hinged to the left side of the main valve body. The left side of the main valve body has an installation groove, and an installation plate is slidably connected inside the installation groove. A sound-absorbing cotton board is fixed to the top of the installation plate, and a sound-absorbing foam layer is fixed to the top of the installation plate.

[0010] Furthermore, the bottom of the baffle is engaged with the main valve body via a latch, and the sound-absorbing cotton board is in close contact with the sound-absorbing foam layer.

[0011] Furthermore, the top of the water inlet is connected to the buffer tank, and the left side of the water outlet is connected to the annular cavity.

[0012] Furthermore, the interior of the annular cavity is connected to the cavity, and the flow-limiting plate is fixed inside the cavity.

[0013] Furthermore, a valve stem is slidably connected inside the main valve body, and a valve core is fixed at the bottom end of the valve stem.

[0014] Furthermore, the bottom end of the valve core passes through the main valve body, the flow restrictor, the cavity, and the water inlet groove in sequence and extends into the interior of the water inlet groove.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a valve body suitable for high-pressure, low-flow regulating valves, which has the following advantages:

[0017] This valve body, suitable for high-pressure, low-flow regulating valves, utilizes the combined use of the main valve body, auxiliary valve body, valve stem, flow-reducing components, and noise-reducing components. In practical applications, it effectively operates under high-pressure conditions with significant pressure differences, meeting the requirements for low-flow operation. It effectively avoids cavitation caused by large pressure drops, preventing serious damage to the valve or downstream pipelines that could prevent the valve from closing tightly. This extends the valve's service life, eliminates safety hazards, and effectively reduces noise generated by the regulating valve body, enhancing its practicality for high-pressure, low-flow regulating valves. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a partially enlarged schematic diagram of part A in the structure of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the mounting plate connection structure in this utility model.

[0021] In the diagram: 1 Main valve body, 2 Auxiliary valve body, 3 Valve stem, 4 Valve core, 200 Flow reduction component, 201 Convex block, 202 First through hole, 203 Buffer groove, 204 Water inlet, 205 Sealing ring, 206 Water inlet groove, 207 Cavity, 208 Flow limiting plate, 209 Second through hole, 210 Annular cavity, 211 Water outlet, 300 Noise reduction component, 301 Baffle, 302 Mounting groove, 303 Mounting plate, 304 Sound-absorbing cotton board, 305 Sound-absorbing foam layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This utility model provides a technical solution: a valve body suitable for high pressure to reduce small flow rate regulating valve, including a main valve body 1 and a secondary valve body 2. The main valve body 1 is equipped with a flow reduction component 200 for reducing small flow rate and a noise reduction component 300 for noise reduction.

[0024] By using the main valve body 1, auxiliary valve body 2, valve stem 3, flow reduction component 200, and noise reduction component 300 in combination, the valve can effectively operate under high pressure differential conditions during actual use. It can effectively meet the operating requirements of small flow rates and effectively avoid problems such as cavitation caused by large pressure drops. This effectively prevents serious damage to the valve or downstream pipeline caused by cavitation, which could lead to the valve failing to close tightly. This improves the service life of the valve, eliminates safety hazards, and effectively reduces the noise generated by the regulating valve body, thus improving the practicality of the regulating valve body for high pressure and small flow rate control.

[0025] In this embodiment, the flow reduction component 200 is a structure that reduces the flow rate of water under high pressure.

[0026] like Figure 1 and Figure 2As shown, the flow reduction assembly 200 includes a convex block 201 fixed to the bottom of the main valve body 1. The top of the convex block 201 is provided with a first through hole 202. The top of the secondary valve body 2 is provided with a buffer groove 203. The bottom of the secondary valve body 2 is provided with a water inlet 204. A sealing ring 205 is fixed to the top of the secondary valve body 2. The sealing ring 205 is used to ensure the sealing between the main valve body 1 and the secondary valve body 2. The bottom of the main valve body 1 is provided with a water inlet groove 206. The interior of the main valve body 1 is provided with a cavity 207. A flow limiting plate 208 is fixed inside the main valve body 1. Two second through holes 209 are provided on both the left and right sides of the flow limiting plate 208. An annular cavity 210 is provided inside the main valve body 1. A water outlet 211 is provided on the right side of the main valve body 1.

[0027] It should be noted that the top of the inlet 204 is connected to the buffer tank 203 to ensure that water can enter the buffer tank 203 through the inlet 204, and the left side of the outlet 211 is connected to the annular cavity 210 to ensure that water in the annular cavity 210 can be discharged from the outlet 211.

[0028] In addition, the interior of the annular cavity 210 is connected to the cavity 207, and the flow limiting plate 208 is fixed inside the cavity 207, ensuring that the combined use of the annular cavity 210, the flow limiting plate 208, and the second through hole 209 can further reduce the flow rate of the high-pressure water.

[0029] In addition, a valve stem 3 is slidably connected inside the main valve body 1, and a valve core 4 is fixed at the bottom end of the valve stem 3. The bottom end of the valve core 4 passes through the main valve body 1, the flow limiting plate 208, the cavity 207 and the water inlet 206 in sequence and extends into the interior of the water inlet 206, ensuring that the valve can be opened and closed through the valve core 4.

[0030] In this embodiment, the noise reduction component 300 is a structure used to reduce the noise generated by the main valve body 1.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the noise reduction component 300 includes a baffle 301 hinged to the left side of the main valve body 1. A mounting groove 302 is provided on the left side of the main valve body 1. A mounting plate 303 is slidably connected inside the mounting groove 302. A sound-absorbing cotton plate 304 is fixed to the top of the mounting plate 303. A sound-absorbing foam layer 305 is fixed to the top of the mounting plate 303.

[0032] It should be noted that the bottom of the baffle 301 is engaged with the main valve body 1 by a latch, ensuring that the baffle 301 can be effectively fixed. The sound-absorbing cotton board 304 and the sound-absorbing foam layer 305 are in close contact. The sound-absorbing cotton board 304 and the sound-absorbing foam layer 305 have the same size. The sum of the heights of the sound-absorbing cotton board 304 and the mounting plate 303 is equal to the height of the mounting groove 302. The width of the sound-absorbing cotton board 304 is equal to the width of the mounting groove 302, so that the sound-absorbing cotton board 304 and the sound-absorbing foam layer 305 are installed more stably in the mounting groove 302.

[0033] The working principle of the above embodiments is as follows:

[0034] In use, the inlet 204 is connected to the high-pressure water flow. The buffer groove 203, the convex block 201, and the first through hole 202 initially slow down the water flow. Then, the valve is opened, allowing the valve core 4 to enter the cavity 207, enabling water to flow from the inlet groove 206 into the cavity 207. The combined action of the flow restrictor 208, the second through hole 209, and the annular cavity 210 further slows down the water flow, effectively preventing cavitation and reducing valve cavitation. The sound-absorbing cotton board 304 and the sound-absorbing foam layer 305 effectively absorb the noise generated by the main valve body 1 during use, further improving the performance of the main valve body 1. After a period of use, the latch can be opened to lift the baffle 301, and the sound-absorbing cotton board 304 and the sound-absorbing foam layer 305 can be removed from the mounting groove 302 through the mounting plate 303 and replaced to ensure the subsequent sound absorption effect of the sound-absorbing cotton board 304 and the sound-absorbing foam layer 305. Then, the water flow reduced to a smaller flow rate is discharged from the outlet 211.

[0035] Compared with existing technologies, this valve body, suitable for high-pressure, low-flow regulating valves, through the coordinated use of the main valve body 1, auxiliary valve body 2, valve stem 3, flow reduction component 200, and noise reduction component 300, can effectively operate under high-pressure conditions with pressure differences during actual use. It can effectively meet the operating requirements of low flow rates, effectively avoid problems such as cavitation caused by large pressure drops, and thus effectively prevent serious damage to the valve or downstream pipeline caused by cavitation, resulting in the valve's inability to close tightly. This improves the valve's service life, eliminates safety hazards, and effectively reduces the noise generated by the regulating valve body. It also improves the practicality of the valve body for high-pressure, low-flow regulating valves and solves the problem of low practicality of existing regulating valve bodies.

[0036] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A valve body suitable for high-pressure, low-flow regulating valves, comprising a main valve body (1) and a secondary valve body (2), characterized in that: The main valve body (1) is equipped with a flow reduction component (200) for reducing flow rate, and the main valve body (1) is equipped with a noise reduction component (300) for noise reduction. The flow reduction assembly (200) includes a convex block (201) fixed to the bottom of the main valve body (1). The top of the convex block (201) is provided with a first through hole (202). The top of the secondary valve body (2) is provided with a buffer groove (203). The bottom of the secondary valve body (2) is provided with a water inlet (204). The top of the secondary valve body (2) is fixed with a sealing ring (205). The bottom of the main valve body (1) is provided with a water inlet groove (206). The interior of the main valve body (1) is provided with a cavity (207). The interior of the main valve body (1) is fixed with a flow limiting plate (208). The left and right sides of the flow limiting plate (208) are provided with two second through holes (209). The interior of the main valve body (1) is provided with an annular cavity (210). The right side of the main valve body (1) is provided with a water outlet (211).

2. The valve body for a high-pressure, low-flow regulating valve according to claim 1, characterized in that: The noise reduction component (300) includes a baffle (301) hinged to the left side of the main valve body (1). The left side of the main valve body (1) is provided with a mounting groove (302). A mounting plate (303) is slidably connected inside the mounting groove (302). A sound-absorbing cotton board (304) is fixed to the top of the mounting plate (303). A sound-absorbing foam layer (305) is fixed to the top of the mounting plate (303).

3. The valve body of a high-pressure, low-flow regulating valve according to claim 2, characterized in that: The bottom of the baffle (301) is snapped into the main valve body (1) by a latch, and the sound-absorbing cotton board (304) is in close contact with the sound-absorbing foam layer (305).

4. The valve body of a high-pressure, low-flow regulating valve according to claim 1, characterized in that: The top of the inlet (204) is connected to the buffer tank (203), and the left side of the outlet (211) is connected to the annular cavity (210).

5. A valve body for a high-pressure, low-flow regulating valve according to claim 1, characterized in that: The interior of the annular cavity (210) is connected to the cavity (207), and the flow limiting plate (208) is fixed inside the cavity (207).

6. The valve body of a high-pressure, low-flow regulating valve according to claim 1, characterized in that: The main valve body (1) is internally slidably connected to a valve stem (3), and a valve core (4) is fixed at the bottom end of the valve stem (3).

7. A valve body for a high-pressure, low-flow regulating valve according to claim 6, characterized in that: The bottom end of the valve core (4) passes through the main valve body (1), the flow limiting plate (208), the cavity (207) and the water inlet tank (206) in sequence and extends into the interior of the water inlet tank (206).

Images