Anti-leakage steam pressure reducing valve
By designing a filtration structure and a self-sealing structure in the steam pressure reducing valve, the problem of steam leakage and failure to be blocked is solved, effective filtration and automatic blocking of steam are achieved, and the safety and efficiency of the equipment are improved.
Patent Information
- Application Number
- CN202421083404.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The existing steam pressure reducing valve lacks proper steam filtration function, which leads to steam leakage and cannot effectively seal the leakage, resulting in steam waste and safety hazards.
An anti-leakage steam pressure reducing valve is designed, which adopts a filter structure and a self-sealing structure. The filtration structure includes a diversion ring block, a fan blade, a filter barrel, etc., which accelerates and filters impurities through rotating steam; the self-blocking structure automatically blocks the leakage port through the cooperation of the blocking block and the spring.
Effectively filters moisture and impurities in steam, reduces corrosion to the main valve structure, prevents steam leakage, and automatically blocks leakage when it occurs to avoid steam waste and safety hazards.
Smart Images
Figure CN222377318U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steam pressure reducing valves, in particular to a leakage-proof steam pressure reducing valve. Background Art
[0002] A steam pressure reducing valve is a device used to control the steam pressure in a system. It can regulate and maintain the steam pressure inside the pipeline to ensure that the system operates within a safe pressure range. Steam pressure reducing valves are commonly used in steam boiler systems, heating systems, and other equipment that requires steam pressure regulation. They are designed to ensure that steam is released after reaching the set pressure, thereby avoiding excessive pressure in the pipeline or equipment.
[0003] Existing steam pressure reducing valves often lack proper steam filtering functions. During use, steam pressure reducing valves may leak steam due to erosion of water in the steam and damage to the diaphragm. When steam leaks, most of them cannot block the internal airway, and steam continues to be transported and leaked. This will lead to the waste of some of the continuously leaked steam, and it is also easy to cause burns to workers, thereby reducing equipment efficiency and increasing energy consumption.
[0004] In view of the above problems, it is urgent to carry out innovative design based on the original steam pressure reducing valve. Utility Model Content
[0005] The technical solution of the utility model aims at the technical problem that the existing technical solution is too single, and provides a solution of an anti-leakage steam pressure reducing valve which is significantly different from the existing technology to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leakage-proof steam pressure reducing valve, comprising a tube shell, a middle seat shell is installed on the top of the tube shell, and a pilot shell is installed on the top of the middle seat shell, a filtering structure for filtering impurities and moisture in the steam is provided inside the inlet end of the tube shell, a pilot structure is provided between the middle seat shell and the pilot shell, and the lower end of the pilot structure is connected to a pressure chamber, and the pressure chamber is opened in the shell, an air inlet branch groove and an air outlet branch groove are respectively provided on both sides of the pressure chamber between the tube shell and the middle seat shell, a main valve structure is connected in the pressure chamber, and the lower end of the main valve structure is connected to a bottom cover, and the bottom cover is installed at the bottom of the tube shell, and a self-sealing structure for automatically sealing leakage is provided between the pilot shell and the air inlet branch groove in the middle seat shell.
[0007] Preferably, the filtering structure includes a guide ring block, a fan blade disc, a rotating shaft, a filter barrel, a guide wide channel, a mounting opening, and a collection box. The inlet end of the tube shell is connected to a guide ring block, and a fan blade disc is provided in the guide ring block. The fan blade disc is connected to a rotating shaft, and the end of the rotating shaft is connected to the filter barrel. The filter barrel is rotatably connected to the inner wall of the tube shell. The inner wall of the tube shell is provided with a guide wide channel on one side of the filter barrel, and a mounting opening is provided between the guide wide channel and the bottom of the tube shell, and the mounting opening is sealed with a collection box through an external thread.
[0008] Preferably, the inner wall of the guide ring block is configured as a spiral structure for assisting steam rotation, the openings at both ends of the filter barrel are different in size, and the opening at one end of the filter barrel close to the main valve structure is smaller, and the outer wall of the filter barrel is located in the wide guide channel area and has holes densely and evenly spaced.
[0009] Preferably, the pilot structure includes an adjusting screw, an adjusting spring, a diaphragm, a pilot valve core, a pilot valve spring, and a transfer channel. The top threaded seal of the pilot shell is connected to the adjusting screw, and the lower end of the adjusting screw is connected to the adjusting spring, and the lower end of the adjusting spring is connected to the diaphragm. The bottom of the diaphragm is fitted with a pilot valve core, and the bottom of the pilot valve core is connected to the pilot valve spring, and the pilot valve spring is connected to the middle seat shell, and a transfer channel connecting to the pressure chamber is provided in the middle seat shell.
[0010] Preferably, the main valve structure includes a main valve spring, a main valve seat, and a main valve piston. The top of the bottom cover is connected to the main valve spring, and the upper end of the main valve spring is connected to the main valve seat. The upper end of the main valve seat is connected to the main valve piston, and the main valve piston is located in the pressure chamber.
[0011] Preferably, the self-sealing structure includes a connecting pipe, a sealing spring, and a blocking block. A connecting pipe is connected between the middle seat shell and the pilot shell, and a sealing spring is connected to one end of the connecting pipe connected to the intake branch groove. A sealing block is connected to the end of the sealing spring, and the blocking block is used to block the intake branch groove. A slot is opened in the middle seat shell, and a locking spring is connected in the slot. An arc-shaped locking block is connected to the end of the locking spring, and the end of the arc-shaped locking block is located in the connecting pipe and fits with the end of the blocking block.
[0012] Compared with the prior art, the utility model has the following beneficial effects: the anti-leakage steam pressure reducing valve, through the setting of the filtering structure, when the steam passes through the guide ring block, the inner diameter of the guide ring is much smaller than the inner diameter of the tube shell, thereby increasing the steam flow rate, and the setting of the spiral structure blades on the inner wall of the guide ring causes the passing airflow to rotate at the same time, and the setting of the fan blade disk will drive the airflow to rotate when it passes through, which further assists the steam passing through the guide ring block to rotate, and drives the filter barrel to rotate. After the rotating steam enters the filter barrel, it is affected by the rotation of the filter barrel The influence of rotation and the spiral blades arranged on its inner wall further speed up the rotation speed of the steam, thereby generating a certain centrifugal force. After being filtered through the holes on the filter barrel, the impurities and moisture pass through the filter barrel into the wide guide channel, and finally gather from the installation opening to the collection box for collection. In addition, when the other end of the filter barrel is set as a narrow mouth, the steam can be more fully rotated in the filter barrel to filter the impurities and moisture therein, and then enter the main valve structure area, thereby filtering the moisture and impurities in the steam, reducing the corrosion effect on the main valve structure, and preventing steam leakage.
[0013] By setting the self-sealing structure, when the diaphragm is damaged and leaks, for example, the valve body enters the pilot shell and leaks. When the steam is expected to flow out to the outside, the steam enters the connecting pipe, pushes the blocking block into the air inlet branch groove, and blocks it, preventing the steam entering the inlet end of the tube shell from continuing to enter the middle seat shell through the air inlet branch groove to trigger the pilot structure and the main valve structure to open. Since there is no further entry of steam to trigger, the pilot structure and the main valve structure will be reset under the action of the spring, so that the valve body is closed, and the steam is prevented from continuing to circulate and leak. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the front cross-sectional structure of the filter barrel of the utility model;
[0015] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;
[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the tube shell of the utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the diversion wide channel of the utility model;
[0018] Figure 5 This is a front view structural schematic diagram of the utility model.
[0019] In the figure: 1, tube shell; 2, middle seat shell; 3, pilot shell; 4, filter structure; 401, guide ring block; 402, fan disk; 403, shaft; 404, filter barrel; 405, guide channel; 406, installation opening; 407, collection box; 5, pilot structure; 501, adjustment screw; 502, adjustment spring; 503, diaphragm; 504, pilot valve core; 505, pilot valve spring ; 506, transfer channel; 6, pressure chamber; 7, inlet branch channel; 8, outlet branch channel; 9, main valve structure; 901, main valve spring; 902, main valve seat; 903, main valve piston; 10, bottom cover; 11, self-sealing structure; 1101, connecting pipe; 1102, sealing spring; 1103, sealing block; 1104, slot; 1105, locking spring; 1106, arc-shaped locking block. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-5 The utility model provides a technical solution: a leakage-proof steam pressure reducing valve, including a pipe shell 1, a middle seat shell 2, a pilot shell 3, a filtering structure 4, a guide ring block 401, a fan blade disk 402, a rotating shaft 403, a filtering barrel 404, a guide wide channel 405, an installation opening 406, a collecting box 407, a pilot structure 5, an adjusting screw 501, an adjusting spring 502, a diaphragm 503, a pilot valve core 504, a pilot valve spring 505, a transfer channel 506, a pressure chamber 6, an air inlet branch channel 7, an air outlet branch channel 8, a main valve structure 9, a main valve spring 901, a main valve seat 902, a main valve piston 903, a bottom cover 10, a self-sealing structure 11, a connecting pipe 1101, a blocking spring 1102, and a blocking block 11 03. A middle seat shell 2 is installed on the top of the tube shell 1, and a pilot shell 3 is installed on the top of the middle seat shell 2. A filtering structure 4 for filtering impurities and moisture in steam is provided inside the inlet end of the tube shell 1. A pilot structure 5 is provided between the middle seat shell 2 and the pilot shell 3, and the lower end of the pilot structure 5 is connected to a pressure chamber 6, and the pressure chamber 6 is opened in the shell 1. An air inlet branch groove 7 and an air outlet branch groove 8 are respectively provided on both sides of the pressure chamber 6 between the tube shell 1 and the middle seat shell 2. A main valve structure 9 is connected in the pressure chamber 6, and the lower end of the main valve structure 9 is connected to a bottom cover 10, and the bottom cover 10 is installed at the bottom of the tube shell 1. A self-sealing structure 11 for automatically sealing leakage is provided between the pilot shell 3 and the air inlet branch groove 7 in the middle seat shell 2.
[0022] The filtering structure 4 includes a guide ring block 401, a fan disk 402, a rotating shaft 403, a filter barrel 404, a guide wide channel 405, an installation opening 406, and a collection box 407. The guide ring block 401 is connected to the inlet end of the tube shell 1, and the guide ring block 401 is provided with a fan disk 402, the fan disk 402 is connected to the rotating shaft 403, and the end of the rotating shaft 403 is connected to the filter barrel 404, the filter barrel 404 is rotatably connected to the inner wall of the tube shell 1, and the inner wall of the tube shell 1 is provided with a guide wide channel 405 on one side of the filter barrel 404, and an installation opening 406 is provided between the guide wide channel 405 and the bottom of the tube shell 1, and the installation opening 406 is externally threaded and sealed with a collection box 407.
[0023] The inner wall of the guide ring block 401 is set to a spiral structure for assisting steam rotation. The openings at both ends of the filter barrel 404 are of different sizes, and the opening at the end of the filter barrel 404 close to the main valve structure 9 is smaller. The outer wall of the filter barrel 404 is located in the guide wide channel 405 area and has holes densely opened at equal intervals.
[0024] The pilot structure 5 includes an adjusting screw 501, an adjusting spring 502, a diaphragm 503, a pilot valve core 504, a pilot valve spring 505, and a transfer channel 506. The top threaded sealing connection of the pilot shell 3 is connected with the adjusting screw 501, and the lower end of the adjusting screw 501 is connected with the adjusting spring 502, and the lower end of the adjusting spring 502 is connected with the diaphragm 503, the bottom of the diaphragm 503 is fitted with the pilot valve core 504, and the bottom of the pilot valve core 504 is connected with the pilot valve spring 505, and the pilot valve spring 505 is connected to the middle seat shell 2, and the middle seat shell 2 is provided with a transfer channel 506 connected to the pressure chamber 6.
[0025] The main valve structure 9 includes a main valve spring 901, a main valve seat 902, and a main valve piston 903. The main valve spring 901 is connected to the top of the bottom cover 10, and the upper end of the main valve spring 901 is connected to the main valve seat 902, and the upper end of the main valve seat 902 is connected to the main valve piston 903, and the main valve piston 903 is located in the pressure chamber 6.
[0026] The self-sealing structure 11 includes a connecting pipe 1101, a sealing spring 1102, and a sealing block 1103. The middle seat shell 2 and the pilot shell 3 are connected by a connecting pipe 1101, and a sealing spring 1102 is connected to one end of the connecting pipe 1101 connected to the intake branch groove 7. The end of the sealing spring 1102 is connected to a blocking block 1103, and the blocking block 1103 is used to block the intake branch groove 7. A slot 1104 is provided in the middle seat shell 2, and a locking spring 1105 is connected to the slot 1104. An arc-shaped locking block 1106 is connected to the end of the locking spring 1105, and the end of the arc-shaped locking block 1106 is located in the connecting pipe 1101 and fits with the end of the blocking block 1103.
[0027] Working principle: According to Figure 1 As shown, first, the shell 1 is installed and connected with the pipeline, and the adjusting screw 501 is rotated as needed to compress the adjusting spring 502 to adjust the pressure control size. When the steam enters the inlet end of the shell 1 through the pipeline, it first passes through the guide ring block 401 for pressurization and acceleration, and under the influence of its spiral inner wall and the fan blade disk 402, the steam rotates and enters the filter barrel 404. At the same time, due to the influence of the fan blade disk 402 and the rotating shaft 403, the filter barrel 404 is driven to rotate at the same time, so that the spiral blades on the rotating shaft 403 and the inner wall of the filter barrel 404 continue to drive the rotating steam to further speed up the rotation, thereby generating a certain centrifugal force, so that the moisture and impurities in the steam are filtered through the holes on the outer wall of the filter barrel 404, and then enter the guide wide channel 405, and then gather from the installation opening 406 to the collection box 407 for collection. Due to the narrow opening at the other end of the filter barrel 404, the steam can be more fully filtered of impurities and moisture in the filter barrel 404;
[0028] The filtered steam enters the main valve structure 9 area, and part of it enters the pilot structure 5 through the air inlet branch channel 7. When the thrust is greater than the adjusting spring 502, the pilot valve core 504 and the diaphragm 503 are pushed upward, and the steam enters the pressure chamber 6 through the transfer channel 506, pressing down the main valve piston 903 and the main valve seat 902, and the main valve spring 901 is compressed, so that the steam can pass through the main valve seat 902 and flow from the other end of the shell 1 into other pipelines, and another air flow enters the middle seat shell 2 through the air outlet branch channel 8 and contacts the bottom of the diaphragm 503, and generates an upward force on the diaphragm 503. This force and the force of the pilot valve spring 505 acting on the diaphragm 503 jointly determine the opening of the pilot valve, thereby automatically adjusting the pressure acting on the main valve piston 903 and the opening of the main valve seat 902 to ensure that the pressure always remains stable;
[0029] When the diaphragm 503 is damaged and steam leakage occurs, steam enters through the connecting pipe 1101, generating a thrust on the blocking block 1103, which cooperates with the blocking spring 1102 and is greater than the limit of the arc-shaped locking block 1106, pushing the arc surface of the arc-shaped locking block 1106 into the slot 1104, so that the blocking block 1103 is pushed into the intake branch channel 7 for blocking, so that the steam in the intake branch channel 7 cannot enter the pilot structure 5 for triggering, the main valve structure 9 is closed, and the steam cannot continue to pass through, thereby avoiding steam leakage and also avoiding steam leakage from causing harm to maintenance personnel and workers. This is the working principle of the anti-leakage steam pressure reducing valve.
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A leak-proof steam pressure reducing valve, comprising a pipe housing (1), characterized in that: A middle seat shell (2) is installed on the top of the tube shell (1), and a pilot shell (3) is installed on the top of the middle seat shell (2). A filtering structure (4) for filtering impurities and moisture in steam is provided inside the inlet end of the tube shell (1). A pilot structure (5) is provided between the middle seat shell (2) and the pilot shell (3), and the lower end of the pilot structure (5) is connected to a pressure chamber (6), and the pressure chamber (6) is opened in the shell (1). An air inlet branch groove (7) and an air outlet branch groove (8) are respectively opened on both sides of the pressure chamber (6) between the tube shell (1) and the middle seat shell (2). A main valve structure (9) is connected inside the pressure chamber (6), and the lower end of the main valve structure (9) is connected to a bottom cover (10), and the bottom cover (10) is installed at the bottom of the tube shell (1). A self-sealing structure (11) for automatically sealing leakage is provided between the pilot shell (3) and the air inlet branch groove (7) in the middle seat shell (2).
2. The anti-leakage steam pressure reducing valve according to claim 1, characterized in that: The filtering structure (4) comprises a flow guide ring block (401), a fan disc (402), a rotating shaft (403), a filter barrel (404), a flow guide wide channel (405), a mounting opening (406), and a collection box (407); the flow guide ring block (401) is connected to the inlet end of the tube housing (1), and the flow guide ring block (401) is provided with a fan disc (402); the fan disc (402) is connected to the rotating shaft (403), and the end of the rotating shaft (403) is connected to the filter barrel (404); the filter barrel (404) is rotatably connected to the inner wall of the tube housing (1); the inner wall of the tube housing (1) is provided with a flow guide wide channel (405) on one side of the filter barrel (404), and a mounting opening (406) is provided between the flow guide wide channel (405) and the bottom of the tube housing (1); and the mounting opening (406) is externally threadedly sealed and connected to the collection box (407).
3. The anti-leakage steam pressure reducing valve according to claim 2, characterized in that: The inner wall of the guide ring block (401) is configured as a spiral structure for assisting steam rotation. The openings at both ends of the filter barrel (404) are of different sizes, and the opening at one end of the filter barrel (404) close to the main valve structure (9) is smaller. The outer wall of the filter barrel (404) is provided with holes densely spaced at equal intervals in the area of the guide wide channel (405).
4. The anti-leakage steam pressure reducing valve according to claim 1, characterized in that: The pilot structure (5) comprises an adjusting screw (501), an adjusting spring (502), a diaphragm (503), a pilot valve core (504), a pilot valve spring (505), and a transfer channel (506); the top of the pilot housing (3) is threadedly sealed with the adjusting screw (501), the lower end of the adjusting screw (501) is connected to the adjusting spring (502), and the lower end of the adjusting spring (502) is connected to the diaphragm (503); the bottom of the diaphragm (503) is fitted with the pilot valve core (504), the bottom of the pilot valve core (504) is connected to the pilot valve spring (505), and the pilot valve spring (505) is connected to the middle seat housing (2); and the middle seat housing (2) is provided with a transfer channel (506) communicating with the pressure chamber (6).
5. The anti-leakage steam pressure reducing valve according to claim 1, characterized in that: The main valve structure (9) comprises a main valve spring (901), a main valve seat (902), and a main valve piston (903); the top of the bottom cover (10) is connected to the main valve spring (901), and the upper end of the main valve spring (901) is connected to the main valve seat (902); the upper end of the main valve seat (902) is connected to the main valve piston (903), and the main valve piston (903) is located in the pressure chamber (6).
6. The anti-leakage steam pressure reducing valve according to claim 1, characterized in that: The self-blocking structure (11) comprises a connecting pipe (1101), a blocking spring (1102), a blocking block (1103), a slot (1104), a blocking spring (1105), and an arc-shaped blocking block (1106); the middle seat housing (2) and the pilot housing (3) are connected by a connecting pipe (1101); and the connecting pipe (1101) is connected to one end of the intake branch channel (7) and is connected to a blocking spring (1102); the blocking spring (1103) is connected to the intake branch channel (7); 02) is connected to an end thereof with a blocking block (1103), and the blocking block (1103) is used to block the air intake branch channel (7); a slot (1104) is provided in the middle seat shell (2), and a locking spring (1105) is connected in the slot (1104); an arc-shaped locking block (1106) is connected to the end of the locking spring (1105), and the end of the arc-shaped locking block (1106) is located in the connecting pipe (1101) and fits with the end of the blocking block (1103).