High-pressure reducing valve easy to maintain

Abstract

The high-pressure reducing valve easy to maintain comprises a valve seat, a sliding cavity is formed in the valve seat, a movable pressing block is slidably connected to the interior of the sliding cavity in a matched mode, a blanking cap is connected to the position, located at an outer port of the sliding cavity, of the valve seat, and an anti-blocking inner sleeve is arranged at the joint of a flow guiding-in channel and a pressure buffering spring in the inner cavity in a sleeved mode. The pressure reducing process is simple and effective, and during repair and maintenance, the movable pressing block, the pressure relieving spring and other components can be disassembled by rotating and disassembling the blanking cap, so that cleaning or repair and replacement are facilitated; the anti-blocking inner sleeve is arranged at the joint of the flow guide-in channel and the inner cavity of the pressure buffering spring in a sleeved mode, the inner hexagonal outer thread head is rotated through tools such as a wrench, the anti-blocking inner sleeve can be detached to be cleaned or replaced, and repair and maintenance are easy.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a high-pressure pressure reducing valve that is easy to maintain. Background Technology

[0002] The main function of a high-pressure pressure reducing valve is to reduce the pressure of inlet high-pressure fluid to the required low-pressure level, thereby protecting the safe operation of downstream pipelines and equipment. High-pressure fluid passes through the throttling orifice or throttling channel inside the valve; the sudden change in the channel cross-section causes an increase in flow velocity and a decrease in pressure, thus achieving pressure reduction. However, if the diameter of the fluid passage in a high-pressure pressure reducing valve is too small, it is prone to blockage after long-term use, requiring disassembly and cleaning of the valve body, which is cumbersome. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes an easy-to-maintain high-pressure pressure reducing valve, which more accurately solves the problems described above.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes an easy-to-maintain high-pressure pressure reducing valve, including a valve seat. The valve seat has a sliding cavity inside, and a movable pressure block is slidably connected inside the sliding cavity. One end of the valve seat has a flow inlet channel. A sensitive element is provided on the side of the movable pressure block near the flow inlet channel. A pressure-relieving spring is sleeved around the periphery of the sensitive element. The valve seat has a first flow outlet channel and a second flow outlet channel on both sides, which are connected to the inner cavity where the pressure-relieving spring is located. A plug is connected to the outer port of the valve seat at the sliding cavity. A pressure-relieving cavity is formed on the movable pressure block at the end near the plug. A pressure-relieving channel is formed on the side wall of the sensitive element, which is connected to the inner cavity where the pressure-relieving spring is located, and the pressure-relieving channel is connected to the pressure-relieving cavity.

[0006] Furthermore, the pressure-relieving spring is preferably a wave spring, and the pressure-relieving spring abuts against the wall of the sliding cavity and the end of the movable pressure block.

[0007] Furthermore, the outer wall of the movable pressure block is provided with several piston ring grooves, in which piston rings are fitted, and the piston rings slide in contact with the inner wall of the sliding cavity.

[0008] Furthermore, an anti-blocking inner sleeve is fitted at the connection between the flow inlet channel and the inner cavity where the pressure relief spring is located, and the anti-blocking inner sleeve is interference-fitted into the channel of the flow inlet channel.

[0009] Furthermore, the outer end of the anti-clogging inner sleeve is integrally formed with an internal hexagonal thread, and the internal hexagonal thread is connected to the flow inlet channel by a thread.

[0010] Furthermore, a gasket is provided on the outer surface of the internal hexagonal thread, and a filter screen is provided on the outer surface of the gasket.

[0011] The beneficial effects of this utility model are:

[0012] 1. The pressure reduction process of this utility model is simple and effective. During maintenance, the movable pressure block, pressure relief spring and other components can be disassembled by rotating the plug, which is convenient for cleaning or maintenance and replacement.

[0013] 2. This utility model has an anti-clogging inner sleeve at the connection between the flow inlet channel and the inner cavity where the pressure relief spring is located. The anti-clogging inner sleeve can be disassembled for cleaning or replacement by rotating the internal hexagonal threaded head with a wrench or other tools, making maintenance simple. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] In the diagram: 1. Valve seat; 101. Slide cavity; 102. Movable pressure block; 1021. Sensitive element; 1022. Pressure relief channel; 1023. Pressure relief chamber; 1024. Piston ring; 103. Flow inlet channel; 1031. First flow outlet channel; 1032. Second flow outlet channel; 104. Plug; 105. Anti-clogging inner sleeve; 1051. Hexagonal threaded head; 106. Gasket; 107. Filter screen; 108. Pressure relief spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1

[0019] A maintenance-friendly high-pressure pressure reducing valve includes a valve seat 1. A sliding cavity 101 is formed inside the valve seat 1. A movable pressure block 102 is slidably connected inside the sliding cavity 101. One end of the valve seat 1 has a flow inlet channel 103. A sensitive element 1021 is provided on the side of the movable pressure block 102 near the flow inlet channel 103. A pressure-relieving spring 108 is sleeved around the sensitive element 1021. The pressure-relieving spring 108 is preferably a wave spring, and it abuts against the cavity wall of the sliding cavity 101 and the end of the movable pressure block 102. The valve seat 1 has a first flow outlet channel 1031 and a second flow outlet channel 1032 on both sides, which are connected to the inner cavity of the pressure relief spring 108. The valve seat 1 is connected to a plug 104 at the outer port of the slide cavity 101. The movable pressure block 102 has a pressure relief cavity 1023 at one end near the plug 104. The sensitive element 1021 has a pressure relief channel 1022 on its side wall, which is connected to the inner cavity of the pressure relief spring 108, and the pressure relief channel 1022 is connected to the pressure relief cavity 1023. When the pressure of the fluid entering the flow inlet channel 103 is too high, the high-pressure fluid enters the pressure relief chamber 1023 of the movable pressure block 102 along the pressure relief channel 1022. As the pressure inside the pressure relief chamber 1023 increases, the movable pressure block 102 moves to compress the pressure relief spring 108. When the pressure relief spring 108 is compressed, its spring hole shrinks, thereby reducing the flow rate of the fluid flowing out of the first flow outlet channel 1031 and the second flow outlet channel 1032. During maintenance, the movable pressure block 102, pressure relief spring 108 and other components can be disassembled by rotating and disassembling the plug 104 for easy cleaning or maintenance and replacement.

[0020] The outer wall of the movable pressure block 102 is provided with several piston ring grooves, and piston rings 1024 are fitted in the piston ring grooves. The piston rings 1024 are slidably engaged with the inner wall of the sliding cavity 101 to ensure the water tightness of the inner cavity of the pressure relief cavity 1023.

[0021] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: the pressure reduction process of this utility model is simple and effective, and during maintenance, the movable pressure block 102, pressure relief spring 108 and other components can be disassembled by rotating and disassembling the plug 104, which is convenient for cleaning or maintenance and replacement.

[0022] Example 2

[0023] An anti-clogging inner sleeve 105 is fitted at the connection between the flow inlet channel 103 and the inner cavity where the pressure relief spring 108 is located. The anti-clogging inner sleeve 105 is interference-fitted into the channel of the flow inlet channel 103. The outer end of the anti-clogging inner sleeve 105 is integrally formed with an internal hexagonal threaded end 1051, which is threaded into the flow inlet channel 103. When the flow inlet channel 103 is used to introduce fluid for a long time, it is prone to blockage. The anti-clogging inner sleeve 105 can be disassembled for cleaning or replacement by rotating the internal hexagonal threaded end 1051 with a wrench or other tools. The maintenance is simple.

[0024] A gasket 106 is provided on the outer surface of the internal hexagonal thread 1051, and a filter screen 107 is provided on the outer surface of the gasket 106 to further prevent impurities from entering and causing blockage during flow.

[0025] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: The present invention provides an anti-blocking inner sleeve 105 at the connection between the flow inlet channel 103 and the inner cavity where the pressure relief spring 108 is located. By rotating the internal hexagonal thread 1051 with a wrench or other tools, the anti-blocking inner sleeve 105 can be disassembled for cleaning or replacement, making maintenance simple.

[0026] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A maintenance-friendly high-pressure pressure-reducing valve comprising a valve seat (1), characterized in that The valve seat (1) has a sliding cavity (101) inside, and a movable pressure block (102) is slidably connected inside the sliding cavity (101). One end of the valve seat (1) has a flow inlet channel (103). A sensitive element (1021) is provided on the side of the movable pressure block (102) near the flow inlet channel (103). A pressure relief spring (108) is sleeved on the outer periphery of the sensitive element (1021). The valve seat (1) has first flow inlet channels on both sides that communicate with the inner cavity of the pressure relief spring (108). The valve seat (1) is connected to a plug (104) at the outer port of the sliding cavity (101). The movable pressure block (102) has a pressure relief cavity (1023) at one end near the plug (104). The sensitive element (1021) has a pressure relief channel (1022) on its side wall that communicates with the inner cavity of the pressure relief spring (108), and the pressure relief channel (1022) is connected to the pressure relief cavity (1023).

2. A high pressure relief valve according to claim 1, characterized in that The pressure relief spring (108) is a wave spring, and the pressure relief spring (108) abuts against the cavity wall of the sliding cavity (101) and the end of the movable pressure block (102).

3. A high pressure relief valve according to claim 1, wherein The outer wall of the movable pressure block (102) is provided with several piston ring grooves, and piston rings (1024) are fitted in the piston ring grooves. The piston rings (1024) are slidably connected to the inner wall of the sliding cavity (101).

4. A high pressure relief valve according to claim 1, wherein An anti-blocking inner sleeve (105) is provided at the connection between the flow inlet channel (103) and the inner cavity where the pressure relief spring (108) is located. The anti-blocking inner sleeve (105) is interference-fitted into the channel of the flow inlet channel (103).

5. A high pressure relief valve according to claim 4, characterized in that The outer end of the anti-clogging inner sleeve (105) is integrally formed with an internal hexagonal external thread (1051), and the internal hexagonal external thread (1051) is connected to the flow inlet channel (103) by a thread.

6. A high pressure relief valve according to claim 5, wherein A gasket (106) is provided on the outer surface of the internal hexagonal threaded head (1051), and a filter screen (107) is provided on the outer surface of the gasket (106).

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