Clean sealed multi-leaf opposed regulating valve

Abstract

This utility model discloses a clean, sealed multi-leaf opposing control valve, relating to the field of control valve technology. It includes a valve body, an actuator fixedly mounted on the upper end of the valve body, a valve stem rotatably mounted on the valve body, a valve plate fixedly mounted on the valve stem, a drive connecting rod rotatably connected to the upper end of the valve stem, and a sealing mechanism mounted on the valve body. The sealing mechanism includes a sealing seat fixedly mounted on the valve body, with the valve stem rotatably mounted on the sealing seat. A pressure housing is fixedly mounted at the bottom of the sealing seat, through which the valve stem passes. An upper sealing ring is provided inside the sealing seat, and a lower sealing ring is provided inside the pressure housing. A pressure boosting mechanism is connected to the pressure housing, and a plug is connected to the upper end of the sealing seat. This clean, sealed multi-leaf opposing control valve, through the combined use of the sealing mechanism and the pressure boosting mechanism, can prevent dust from entering the valve body, and an alarm will sound when the sealing ring is damaged, reminding the user to replace the seal in time.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically a clean, sealed, multi-leaf opposing regulating valve. Background Technology

[0002] Multi-leaf opposing control valve is a widely used air volume regulating device in ventilation, air conditioning and air handling systems. Its core structure consists of multiple parallel blades that rotate synchronously in opposite directions through a linkage mechanism.

[0003] In the prior art, patent announcement number CN213088876U discloses an automatic regulating device for a multi-leaf split-open control valve, including a multi-leaf split-open section and a regulating valve connected to the multi-leaf split-open section. The automatic regulating device also includes an electric actuator, a differential pressure sensor, and a controller. The differential pressure sensor and the controller are electrically connected, and the electric actuator is electrically connected to the controller. The electric actuator is mounted on the valve stem of the regulating valve.

[0004] By rotating the valve stem, the opening angle of the valve plate can be precisely controlled, thereby achieving continuous regulation of gas flow. However, in actual operation, due to unavoidable assembly gaps at the connection between the valve stem and the valve body, fine dust particles from the environment can easily seep into the internal cavity of the valve body through these tiny gaps. This can disrupt the high-cleanliness, sealed working environment, leading to decreased product quality or interference with the process. Therefore, a clean-sealed multi-leaf opposing-opening regulating valve is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a clean, sealed, multi-leaf opposing regulating valve to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a clean, sealed, multi-leaf opposing regulating valve, comprising a valve body, an actuator fixedly mounted on the upper end of the valve body, a valve stem rotatably mounted on the valve body, a valve plate fixedly mounted on the valve stem, a drive connecting rod rotatably connected to the upper end of the valve stem, a sealing mechanism mounted on the valve body, the sealing mechanism comprising a sealing seat fixedly mounted on the valve body, and the valve stem rotatably mounted on the sealing seat, a pressure housing fixedly mounted at the bottom of the sealing seat, and the valve stem passing through the pressure housing, an upper sealing ring provided inside the sealing seat, a lower sealing ring provided inside the pressure housing, and a pressurizing mechanism connected to the pressure housing.

[0007] Preferably, a plug is connected to the upper end of the sealing seat, a bolt is connected to the edge of the plug, and a pressure monitoring alarm is connected to the side wall of the pressure housing.

[0008] Preferably, the sealing seat has a threaded hole, and the bolt is connected to the sealing seat through the threaded hole.

[0009] Preferably, the valve stem is rotatably mounted on the valve body via a sealing seat, the plug is fixedly mounted on the sealing seat by bolts, a mounting hole is provided on one side of the pressure housing, and the air pressure monitoring alarm is mounted on one side of the pressure housing through the mounting hole.

[0010] Preferably, the pressurization mechanism includes an air cylinder fixedly installed on the valve body, a return spring is provided inside the air cylinder, a piston plate is movably installed inside the air cylinder, a pressure cap is fixedly installed on the piston plate, an air inlet and an air outlet are provided at the bottom of the air cylinder, a one-way valve is fixedly installed in both the air inlet and the air outlet, and an air inlet pipe is connected to the air outlet.

[0011] Preferably, the valve body has an installation port, and the air cylinder is installed on the valve body through the installation port.

[0012] Preferably, the upper end of the inflation cylinder has an inlet and outlet, and the pressure cap extends out of the inflation cylinder through the inlet and outlet.

[0013] Preferably, one end of the return spring is connected to the bottom of the inflation cylinder, the other end of the return spring is connected to the bottom of the piston plate, one end of the inflation tube is connected to the inflation cylinder, and the other end of the inflation tube is connected to the pressure shell.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this application, the upper sealing ring in the sealing seat and the lower sealing ring in the pressure housing fill the gaps around the valve stem to prevent dust from entering the valve body through these gaps. Furthermore, the pressure housing is filled with compressed gas. When the sealing ring is damaged and loses its sealing function, the high-pressure gas inside the pressure housing will leak, leading to a sharp drop in pressure. The pressure monitoring alarm can detect this sharp drop in pressure and issue an alarm to remind the user to replace the sealing ring in a timely manner to ensure gas cleanliness.

[0016] 2. In this application, pressing the cap causes the piston plate to move upward; releasing the cap causes the return spring to cause the piston plate to return to its original position and move upward. When the piston plate moves upward, external gas is drawn into the inflation cylinder; when the piston plate moves downward, the gas in the inflation cylinder is forced out and transported to the pressure housing through the inflation pipe, so that the gas in the pressure housing is maintained at a high pressure for monitoring by the gas pressure monitoring alarm. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the sealing mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the pressurization mechanism of this utility model.

[0021] The diagram shows the following components: 1. Valve body; 2. Valve plate; 3. Actuator; 4. Drive rod; 5. Valve stem; 6. Sealing mechanism; 601. Sealing seat; 602. Plug; 603. Bolt; 604. Upper sealing ring; 605. Lower sealing ring; 606. Air pressure monitoring alarm; 607. Pressure housing; 7. Pressurization mechanism; 701. Inflation cylinder; 702. Pressure cap; 703. Piston plate; 704. Air inlet; 705. Check valve; 706. Return spring; 707. Inflation pipe; 708. Air outlet. 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. 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.

[0023] Example 1: As Figure 1 and Figure 2 As shown, this utility model provides a technical solution for a clean, sealed, multi-leaf opposing regulating valve, including a valve body 1, an actuator 3 fixedly installed on the upper end of the valve body 1, a valve stem 5 rotatably installed on the valve body 1, a valve plate 2 fixedly installed on the valve stem 5, a drive connecting rod 4 rotatably connected to the upper end of the valve stem 5, a sealing mechanism 6 installed on the valve body 1, and a pressure boosting mechanism 7 connected to the pressure housing 607.

[0024] Specifically, actuator 3 drives the central valve stem 5 to rotate. After the central valve stem 5 rotates, the connecting rod 4 drives the valve stems 5 on both sides to rotate, thereby adjusting the opening angle of the valve plate 2 and controlling the air intake. Through the cooperation of the sealing mechanism 6 and the pressurizing mechanism 7, dust can be prevented from entering the valve body 1, and an alarm will be triggered when the sealing ring is damaged, reminding the user to replace the sealing ring in time.

[0025] Example 2: Figure 2 and Figure 3As shown, the sealing mechanism 6 includes a sealing seat 601 fixedly installed on the valve body 1, and the valve stem 5 is rotatably installed on the sealing seat 601. A pressure housing 607 is fixedly installed at the bottom of the sealing seat 601, and the valve stem 5 passes through the pressure housing 607. An upper sealing ring 604 is provided inside the sealing seat 601, and a lower sealing ring 605 is provided inside the pressure housing 607. A plug 602 is connected to the upper end of the sealing seat 601, and a bolt 603 is connected to the edge of the plug 602. A pressure monitoring alarm 606 is connected to the side wall of the pressure housing 607. A threaded hole is opened on the sealing seat 601, and the bolt 603 is connected to the sealing seat 601 through the threaded hole.

[0026] Specifically, the upper sealing ring 604 in the sealing seat 601 and the lower sealing ring 605 in the pressure housing 607 fill the gap around the valve stem 5, preventing dust from entering the valve body 1 through the gap around the valve stem 5. Furthermore, the pressure housing 607 is filled with compressed gas. When the sealing ring is damaged due to aging, wear, or improper installation, causing its sealing performance to fail, the high-pressure gas inside the pressure housing 607 will leak through the seal failure point. This leakage will cause the gas pressure inside the pressure housing 607 to drop rapidly, forming a significant pressure drop. At this time, the gas pressure monitoring alarm 606 installed on the system will monitor this abnormal gas pressure change in real time and immediately trigger the alarm mechanism. This alarm can promptly remind operators to pay attention to the sealing ring failure, prompting staff to quickly replace the sealing ring. By replacing the sealing ring in a timely manner, the sealing performance of the system can be restored, ensuring the sealing and cleanliness of the gas inside the pressure housing 607, and avoiding pollution or safety hazards caused by gas leakage.

[0027] Example 3: Figure 2 and Figure 4 As shown, the pressurization mechanism 7 includes an inflation cylinder 701 fixedly mounted on the valve body 1. A return spring 706 is installed inside the inflation cylinder 701. A piston plate 703 is movably mounted inside the inflation cylinder 701, and a pressure cap 702 is fixedly mounted on the piston plate 703. An air inlet 704 and an air outlet 708 are provided at the bottom of the inflation cylinder 701. A one-way valve 705 is fixedly installed in both the air inlet 704 and the air outlet 708. An inflation pipe 707 is connected to the air outlet 708. An installation port is provided on the valve body 1, and the inflation cylinder 701 is installed on the valve body 1 through the installation port. The one-way valve 705 in the air inlet 704 only allows gas to enter the inflation cylinder 701, and the one-way valve 705 in the air outlet 708 only allows gas to exit the inflation cylinder 701.

[0028] Specifically, pressing the cap 702 causes the piston plate 703 to move upward; releasing the cap 702 causes the return spring 706 to return the piston plate 703 to its original upward position. When the piston plate 703 moves upward, external gas is drawn into the inflation cylinder 701; when the piston plate 703 moves downward, the gas in the inflation cylinder 701 is forced out and transported to the pressure housing 607 through the inflation pipe 707, maintaining the gas in the pressure housing 607 at a high pressure, which is convenient for the gas pressure monitoring alarm 606 to monitor.

[0029] Working principle: Actuator 3 drives the central valve stem 5 to rotate. This rotation of the central valve stem 5 drives the connecting rod 4, which in turn drives the valve stems 5 on both sides to rotate, thereby adjusting the opening angle of the valve plate 2 and controlling the air intake. The valve stem 5 is mounted on the valve body 1 via the sealing seat 601. The upper sealing ring 604 in the sealing seat 601 and the lower sealing ring 605 in the pressure housing 607 fill the gaps around the valve stem 5, preventing dust from entering the valve body 1 through these gaps. The pressure housing 607 is filled with compressed gas. When the sealing ring is damaged and loses its sealing function, the high-pressure gas inside the pressure housing 607 will leak, causing a sudden drop in pressure. The pressure monitoring alarm 606 will detect this sudden drop in pressure and trigger an alarm, reminding the user to replace the sealing ring in time to ensure gas cleanliness. When the pressure cap 702 is pressed, it will drive the piston plate 703 to move upward. After the pressure cap 702 is released, the return spring 706 will drive the piston plate 703 to move upward. When the piston plate 703 moves upward, the external gas will be drawn into the inflation cylinder 701. When the piston plate 703 moves downward, the gas in the inflation cylinder 701 will be forced out and transported to the pressure housing 607 through the inflation pipe 707, so that the gas in the pressure housing 607 is kept under high pressure so that the air pressure monitoring alarm 606 can monitor it.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A clean, sealed, multi-leaf opposing regulating valve, comprising a valve body (1), an actuator (3) fixedly mounted on the upper end of the valve body (1), a valve stem (5) rotatably mounted on the valve body (1), a valve plate (2) fixedly mounted on the valve stem (5), and a drive connecting rod (4) rotatably connected to the upper end of the valve stem (5), characterized in that: A sealing mechanism (6) is installed on the valve body (1). The sealing mechanism (6) includes a sealing seat (601) fixedly installed on the valve body (1), and the valve stem (5) is rotatably installed on the sealing seat (601). A pressure housing (607) is fixedly installed at the bottom of the sealing seat (601), and the valve stem (5) passes through the pressure housing (607). An upper sealing ring (604) is provided inside the sealing seat (601), and a lower sealing ring (605) is provided inside the pressure housing (607). A pressurizing mechanism (7) is connected to the pressure housing (607).

2. The clean, sealed, multi-leaf opposing regulating valve according to claim 1, characterized in that: A plug (602) is connected to the upper end of the sealing seat (601), and a bolt (603) is connected to the edge of the plug (602). A pressure monitoring alarm (606) is connected to the side wall of the pressure housing (607).

3. A clean, sealed, multi-leaf opposing regulating valve according to claim 2, characterized in that: The sealing seat (601) has a threaded hole, and the bolt (603) is connected to the sealing seat (601) through the threaded hole.

4. A clean, sealed, multi-leaf opposing regulating valve according to claim 3, characterized in that: The valve stem (5) is rotatably mounted on the valve body (1) via the sealing seat (601), the plug (602) is fixedly mounted on the sealing seat (601) via bolts (603), the pressure housing (607) has an installation hole on one side, and the air pressure monitoring alarm (606) is mounted on one side of the pressure housing (607) via the installation hole.

5. A clean, sealed, multi-leaf opposing regulating valve according to claim 4, characterized in that: The pressurization mechanism (7) includes an air cylinder (701) fixedly installed on the valve body (1). The air cylinder (701) is provided with a return spring (706). A piston plate (703) is movably installed in the air cylinder (701). A pressure cap (702) is fixedly installed on the piston plate (703). An air inlet (704) and an air outlet (708) are opened at the bottom of the air cylinder (701). A one-way valve (705) is fixedly installed in both the air inlet (704) and the air outlet (708). An air inlet pipe (707) is connected to the air outlet (708).

6. A clean, sealed, multi-leaf opposing regulating valve according to claim 5, characterized in that: The valve body (1) is provided with an installation port, and the air cylinder (701) is installed on the valve body (1) through the installation port.

7. A clean, sealed, multi-leaf opposing regulating valve according to claim 6, characterized in that: The upper end of the inflation cylinder (701) is provided with an inlet and outlet, and the pressure cap (702) extends out of the inflation cylinder (701) through the inlet and outlet.

8. A clean, sealed, multi-leaf opposing regulating valve according to claim 7, characterized in that: One end of the return spring (706) is connected to the bottom of the air cylinder (701), and the other end of the return spring (706) is connected to the bottom of the piston plate (703). One end of the air tube (707) is connected to the air cylinder (701), and the other end of the air tube (707) is connected to the pressure shell (607).

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