Double-channel steam pressure reducing valve

Abstract

The utility model discloses a double-channel steam pressure reducing valve which comprises a shell, a top cover is installed on the top of the shell, a movable cavity is formed in the shell, a sealing piece is installed in the movable cavity, a valve element structure is arranged in the movable cavity, the lower end of the valve element structure is connected with a bottom cover, and the bottom cover is installed at the bottom of the shell. According to the double-channel steam pressure reducing valve, the triggering pressure of the double channels can be independently adjusted, the triggering pressure difference between the two channels can be separately adjusted according to needs, or the triggering pressure of the two channels can be simultaneously adjusted so as to adapt to different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of steam pressure reducing valve equipment, in particular to a double-channel steam pressure reducing valve. Background Art

[0002] The steam pressure reducing valve controls the opening of the opening and closing parts in the valve body to adjust the flow of the medium and reduce the pressure of the medium. At the same time, it uses the pressure behind the valve to adjust the opening of the opening and closing parts to keep the pressure behind the valve within a certain range. When the inlet pressure keeps changing, the outlet pressure is kept within the set range to protect the living and production equipment behind it.

[0003] The dual-channel steam pressure reducing valve is a valve that can automatically adjust the steam pressure and select the pressure reducing channel independently. It achieves the function of pressure reduction by adjusting the inlet pressure to reduce it to the set outlet pressure. In fluid mechanics, this valve is a throttling element with variable local resistance. By changing the throttling area, the flow rate and fluid kinetic energy are controlled to produce different pressure losses to achieve the purpose of pressure reduction.

[0004] The existing steam pressure reducing valve has certain drawbacks when in use. Firstly, the existing pressure reducing valve has no automatic adjustment function and cannot automatically control the opening and closing of the valve according to the size of the steam pressure, and cannot achieve the purpose of automatic pressure reduction. Secondly, the existing pressure reducing valve cannot independently select the pressure reducing channel and cannot meet the use requirements in different situations. Therefore, a dual-channel steam pressure reducing valve is proposed.

[0005] 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

[0006] The technical solution of the utility model aims at the technical problem that the existing technical solution is too single, and provides a dual-channel steam pressure reducing valve with a solution that is significantly different from the existing technology to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dual-channel steam pressure reducing valve, comprising a shell, a top cover is installed on the top of the shell, and an active cavity is opened in the shell, a sealing member is installed in the active cavity, a valve core structure is provided in the active cavity, and a bottom cover is connected to the lower end of the valve core structure, and the bottom cover is installed at the bottom of the shell, and a pressure relief structure is installed on the outer wall of the shell.

[0008] Preferably, the valve core structure includes a main valve piston, a main valve seat, and a main valve spring. The main valve piston is installed in the movable chamber, and the main valve piston is connected to the main valve seat. The main valve spring is connected between the lower end of the main valve seat and the bottom cover.

[0009] Preferably, the pressure relief structure includes a pressure relief part and an adjusting part, the pressure relief part includes a box body, an inlet cavity, a limit cavity, an installation cavity, a branch pipe, a diaphragm, an adjusting spring, and a connecting block, the outer wall of the shell is connected to the box body, and an inlet cavity is opened at the bottom of the box body, the top of the inlet cavity is connected to the limit cavity on both sides, and each limit cavity is connected to an installation cavity, each of the limit cavity is connected to a branch pipe, and the other end of each branch pipe is connected to the active cavity, a diaphragm is installed in each of the limit cavity, the top of each diaphragm is connected to an adjusting spring, the upper end of each adjusting spring is connected to a connecting block, and the connecting block is located in the corresponding installation cavity.

[0010] Preferably, the adjustment part includes an adjustment rod, a plate body, and a main rod. The top of each connecting block is rotatably connected to an adjustment rod, and the end of each adjustment rod is threadedly connected to the same plate body through the box body. The middle part of the plate body is threadedly connected to a main rod, and the main rod is rotatably connected to the outer wall of the box body.

[0011] Preferably, the box body is configured as an "M"-shaped structure, and the diaphragm and the inner wall of the limiting cavity are in contact with each other.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the dual-channel steam pressure reducing valve realizes the pressure reducing function and additional safety guarantee of the ordinary single-channel steam pressure reducing valve through the setting of the pressure relief structure. When the pressure is too high, the device can automatically trigger the opening of the dual channels to quickly reduce the pressure and ensure the safety of the system. It is worth mentioning that the trigger pressure of the dual channels can be adjusted independently. The trigger pressure difference between the two channels can be adjusted separately as needed, or the trigger pressure of the two channels can be adjusted at the same time to adapt to different working conditions, thereby improving the flexibility and applicability of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the side cross-sectional structure of the box body of the utility model;

[0015] Figure 3 This is a front view structural schematic diagram of the utility model.

[0016] In the figure: 1. shell; 2. top cover; 3. movable chamber; 4. sealing member; 5. valve core structure; 501. main valve piston; 502. main valve seat; 503. main valve spring; 6. bottom cover; 7. pressure relief structure; 701. box body; 702. inlet chamber; 703. limit chamber; 704. installation chamber; 705. branch pipe; 706. diaphragm; 707. adjusting spring; 708. connecting block; 709. adjusting rod; 710. plate body; 711. main rod. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-3 The utility model provides a technical solution: a dual-channel steam pressure reducing valve, including a shell 1, a top cover 2, an active cavity 3, a sealing member 4, a valve core structure 5, a main valve piston 501, a main valve seat 502, a main valve spring 503, a bottom cover 6, a pressure relief structure 7, a box body 701, an inlet cavity 702, a limit cavity 703, an installation cavity 704, a branch pipe 705, a diaphragm 706, an adjusting spring 707, a connecting block 708, an adjusting rod 709, a plate body 710, and a main rod 711. The top cover 2 is installed on the top of the shell 1, and an active cavity 3 is opened in the shell 1, a sealing member 4 is installed in the active cavity 3, a valve core structure 5 is provided in the active cavity 3, and the lower end of the valve core structure 5 is connected to the bottom cover 6, and the bottom cover 6 is installed at the bottom of the shell 1, and the pressure relief structure 7 is installed on the outer wall of the shell 1.

[0019] The valve core structure 5 includes a main valve piston 501 , a main valve seat 502 , and a main valve spring 503 . The main valve piston 501 is installed in the movable chamber 3 , and the main valve piston 501 is connected to the main valve seat 502 . The main valve spring 503 is connected between the lower end of the main valve seat 502 and the bottom cover 6 .

[0020] The pressure relief structure 7 includes a pressure relief part and an adjustment part. The pressure relief part includes a box body 701, an introduction cavity 702, a limiting cavity 703, an installation cavity 704, a branch pipe 705, a diaphragm 706, an adjustment spring 707, and a connecting block 708. The outer wall of the shell 1 is connected to the box body 701, and an introduction cavity 702 is opened at the bottom of the box body 701. The top of the introduction cavity 702 is connected to the limiting cavity 703 on both sides, and each limiting cavity 703 is connected to an installation cavity 704, each limiting cavity 703 is connected to a branch pipe 705, and the other end of each branch pipe 705 is connected to the active cavity 3, each limiting cavity 703 is installed with a diaphragm 706, the top of each diaphragm 706 is connected to an adjustment spring 707, the upper end of each adjustment spring 707 is connected to a connecting block 708, and the connecting block 708 is located in the corresponding installation cavity 704.

[0021] The adjustment part includes an adjustment rod 709, a plate body 710, and a main rod 711. The top of each connecting block 708 is rotatably connected to an adjustment rod 709, and the end of each adjustment rod 709 passes through the box body 701 and is threadedly connected to the same plate body 710. The middle part of the plate body 710 is threadedly connected to a main rod 711, and the main rod 711 is rotatably connected to the outer wall of the box body 701.

[0022] The box body 701 is configured as an “M”-shaped structure, and the diaphragm 706 and the inner wall of the limiting cavity 703 are in contact with each other.

[0023] Working principle: According to Figure 1 As shown, first, the shell 1 is connected to the pipeline through a flange. When the steam enters the shell 1, it flows into the box body 701 and enters the limiting cavity 703. The diaphragm 706 on the side where the push-connecting block 708 and the diaphragm 706 are closer to each other moves in the limiting cavity 703. The regulating spring 707 on this side contracts, so that the steam can flow from the branch pipe 705 that is out of the shielding into the active cavity 3, and the main valve piston 501 is pressed down to push the main valve seat 502 to move downward. The main valve spring 503 is compressed, so that the steam from the shell 1 can flow through the blocking area of ​​the main valve seat 502, thereby achieving the effect of opening the valve to reduce pressure.

[0024] If the steam pressure in the shell 1 is too high, the diaphragm 706 on the other side will be pushed to move in the limit chamber 703, just as described above. Therefore, when the pressure in the shell 1 is too high, the valve can be opened quickly to facilitate the flow of steam and reduce pressure until the pressure drops and resets under the action of the adjusting spring 707 and the main valve spring 503. This is the working principle of the dual-channel steam pressure reducing valve.

[0025] 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 dual-channel steam pressure reducing valve, comprising a housing (1), characterized in that: A top cover (2) is installed on the top of the shell (1), and an active cavity (3) is opened in the shell (1), a sealing member (4) is installed in the active cavity (3), a valve core structure (5) is provided in the active cavity (3), and a bottom cover (6) is connected to the lower end of the valve core structure (5), and the bottom cover (6) is installed on the bottom of the shell (1), and a pressure relief structure (7) is installed on the outer wall of the shell (1).

2. A dual-channel steam pressure reducing valve according to claim 1, characterized in that: The valve core structure (5) comprises a main valve piston (501), a main valve seat (502), and a main valve spring (503); the main valve piston (501) is installed in the movable chamber (3), and the main valve piston (501) is connected to the main valve seat (502); the main valve spring (503) is connected between the lower end of the main valve seat (502) and the bottom cover (6).

3. A dual-channel steam pressure reducing valve according to claim 1, characterized in that: The pressure relief structure (7) comprises a pressure relief portion and an adjustment portion, wherein the pressure relief portion comprises a box body (701), an introduction cavity (702), a limiting cavity (703), an installation cavity (704), a branch pipe (705), a diaphragm (706), an adjustment spring (707), and a connection block (708); the outer wall of the shell (1) is connected to the box body (701), and the bottom of the box body (701) is provided with an introduction cavity (702), and the top two sides of the introduction cavity (702) are respectively connected to the limiting cavity (703), and each limiting cavity ( 703) are connected to an installation cavity (704), each of the limiting cavities (703) is connected to a branch pipe (705), and the other end of each branch pipe (705) is connected to the movable cavity (3), a diaphragm (706) is installed in each of the limiting cavities (703), the top of each diaphragm (706) is connected to an adjustment spring (707), the upper end of each of the adjustment springs (707) is connected to a connection block (708), and the connection block (708) is located in the corresponding installation cavity (704).

4. A dual-channel steam pressure reducing valve according to claim 3, characterized in that: The adjustment portion comprises an adjustment rod (709), a plate body (710), and a main rod (711); the top of each connection block (708) is rotatably connected to an adjustment rod (709); the end of each adjustment rod (709) passes through the box body (701) and is threadedly connected to the same plate body (710); a main rod (711) is threadedly connected to the middle of the plate body (710); and the main rod (711) is rotatably connected to the outer wall of the box body (701).

5. A dual-channel steam pressure reducing valve according to claim 3, characterized in that: The box body (701) is configured as an "M"-shaped structure, and the diaphragm (706) and the inner wall of the limiting cavity (703) are in contact with each other.

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