Piston type step locking device

Abstract

The utility model discloses a piston type step locking device, and particularly relates to the technical field of valves, the piston type step locking device comprises a valve body, an inlet pipe and a discharge pipe, one end of the valve body is connected with the inlet pipe, the bottom end of the valve body is provided with the discharge pipe, the valve body is connected with an opening and closing control assembly, the end portion of the valve body is provided with a sealing cover, and the top end of the valve body is provided with a fixing frame. A locking adjusting assembly is arranged on one side of the fixing frame, a locking assembly connected with the locking adjusting assembly in a sliding mode is installed on the fixing frame, a stepped through groove is formed in the valve body, and the caliber size of the inlet pipe is larger than the caliber size of the connecting position of the inlet pipe and the stepped through groove. Fluid efficiency is optimized through a step structure, double sealing is achieved in combination with an electromechanical locking mechanism, the control reliability and safety of the valve are remarkably improved, and the valve is suitable for fluid control scenes needing high sealing performance and impact resistance.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a piston-type stepped locking device. Background Technology

[0002] In the field of industrial fluid control, valves, as core components of pipeline systems, are widely used in chemical, energy, metallurgical, and environmental protection scenarios, undertaking critical functions such as medium on / off control, flow regulation, and safety protection. Especially in high-pressure, high-flow-rate, or stringent sealing conditions (such as petrochemical raw material transportation, desulfurization slurry control in coal-fired power plants, and gas transmission and distribution systems), the reliability of valves directly affects production safety and system stability.

[0003] Existing valve devices face the following core shortcomings in practical applications:

[0004] Traditional valves often use a single piston or rubber sealing ring for sealing. When the system experiences a sudden power outage, power equipment failure, or a sudden increase in medium pressure, the piston is prone to displacement due to impact force, leading to seal failure. For example, in gas transmission scenarios, if the valve loses power due to a power outage, the medium pressure may rupture the piston seal, causing leakage or even an explosion risk.

[0005] Conventional valves typically employ a constant-diameter, straight-through flow channel without optimizing cross-sectional changes based on fluid mechanics principles. Taking slurry transport as an example, constant-diameter channels easily lead to slow medium flow velocity and particle deposition, especially under high-flow conditions, resulting in significant discharge lag. While some valves increase flow rate by enlarging the pipe diameter, they fail to utilize the "contraction-expansion effect" to increase flow velocity, instead increasing pipeline resistance and energy loss, making it difficult to meet the demands of efficient transmission.

[0006] Therefore, a piston-type stepped locking device is proposed. Utility Model Content

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a piston-type stepped locking device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a piston-type stepped locking device, comprising a valve body, an inlet pipe, and a discharge pipe. One end of the valve body is connected to the inlet pipe, and the bottom end of the valve body is provided with the discharge pipe. The valve body is connected to an opening and closing control component, a sealing cover is installed at the end of the valve body, a fixing frame is installed at the top of the valve body, a locking adjustment component is provided on one side of the fixing frame, and a locking component that is slidably connected to the locking adjustment component is installed on the fixing frame.

[0009] Preferably, a stepped through groove is provided in the valve body, and the diameter of the inlet pipe is larger than the diameter of the connection with the stepped through groove.

[0010] Preferably, the opening and closing control assembly includes an electric actuator, a valve stem, a stepped piston, and a retaining ring. The electric actuator is mounted on a fixed frame and connected to a valve stem. A stepped piston is installed at the end of the valve stem, and a retaining ring is sleeved at the connection between the valve stem and the electric actuator.

[0011] Preferably, the fixing frame has a guide hole, and the top end of the locking component slides in conjunction with the guide hole.

[0012] Preferably, the locking assembly includes a locking block, a guide rod, and a spring. The top of the locking block is connected to the guide rod, one side of the locking block is slidably connected to the locking adjustment assembly, the top of the guide rod is slidably connected to the guide hole, and the spring is sleeved on the guide rod.

[0013] Preferably, a wedge-shaped groove is provided on one side of the locking block, a movable groove is connected below the wedge-shaped groove, and a pressure groove is provided at the bottom of the locking block.

[0014] Preferably, the locking adjustment assembly includes an electric telescopic rod, a connecting block, and a wedge block. The electric telescopic rod is mounted on the valve body, and the connecting block is installed at the telescopic end of the electric telescopic rod. A wedge block is fixedly connected to the top of the connecting block, and the wedge block slides in conjunction with a wedge groove.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. By setting a stepped channel in the valve body, and the inlet pipe diameter being larger than the diameter at the connection with the stepped channel, the diameter of the material flows through the channel "from large to small and then back to large". This utilizes the principle of fluid cross-sectional area change to increase the flow velocity and significantly improve discharge efficiency. In addition, the stepped piston in the opening and closing control component cooperates with the stepped channel to form multiple sealing surfaces, which can simultaneously seal the inlet and outlet pipes, effectively preventing material backflow. This is suitable for high-pressure or high-fluctuation operating conditions.

[0017] 2. By cooperating with the locking and adjusting components, the wedge block pushes the locking block upward, releasing the obstruction of the retaining ring. The electric actuator can freely drive the stepped piston to open and close the valve. The spring drives the locking block downward. The pressure groove cooperates with the extended end of the electric actuator. The locking block blocks the valve stem from moving through the retaining ring. Even if there is a power failure or power failure, it can still resist material impact, maintain a seal, and prevent leakage. The spring structure of the locking component can adapt to material pressure fluctuations. The elastic downward pressure enhances the blocking force of the locking block on the retaining ring, improves locking stability, and solves the problem of insufficient reliability of traditional mechanical locking structures under sudden pressure changes. Attached Figure Description

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

[0019] Figure 2This is a schematic diagram of the opening and closing control component of this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model.

[0021] Figure 4 This is a schematic diagram of the locking component of this utility model.

[0022] Figure 5 This is a schematic diagram of the locking and adjusting component of this utility model.

[0023] The attached figures are labeled as follows: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Sealing cover; 5. Opening / closing control assembly; 501. Electric actuator; 502. Valve stem; 503. Stepped piston; 504. Retaining ring; 6. Fixing bracket; 7. Locking adjustment assembly; 701. Electric telescopic rod; 702. Connecting block; 703. Wedge block; 8. Locking assembly; 801. Locking block; 802. Guide rod; 803. Spring; 804. Pressure groove; 805. Wedge groove; 806. Movable groove; 9. Receiving cavity. Detailed Implementation

[0024] 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.

[0025] As attached Figure 1-5 The piston-type stepped locking device shown includes a valve body 1, an inlet pipe 2, and an outlet pipe 3. One end of the valve body 1 is connected to the inlet pipe 2, and the bottom end of the valve body 1 is provided with the outlet pipe 3. The valve body 1 is connected to an opening and closing control component 5. A sealing cover 4 is installed at the end of the valve body 1, and a fixing frame 6 is installed at the top of the valve body 1. A locking adjustment component 7 is provided on one side of the fixing frame 6, and a locking component 8 that is slidably connected to the locking adjustment component 7 is installed on the fixing frame 6.

[0026] In practice, the valve body 1 is opened by the opening and closing control component 5, allowing the material to enter the valve body 1 from the inlet pipe 2 and then exit from the outlet pipe 3. When the valve body 1 is closed, the locking component 8 descends and presses against the extended end of the electric push rod 501, blocking the retaining ring 504. This ensures that the opening and closing control component 5 always seals the valve body 1. Even in the event of a power outage, the stepped piston 503 can still press against the inside of the valve body 1, thus preventing the material from being filled into the valve body 1 due to excessive force during a power outage. This improves the control of material output and prevents leakage.

[0027] The valve body 1 has a stepped through groove, and the diameter of the inlet pipe 2 is larger than the diameter of the connection with the stepped through groove.

[0028] In practice, when the material enters the valve body 1 from the inlet pipe 2, the diameter of the flow path changes from large to small and then back to large, which can increase the material flow rate. This increases the flow velocity of the material after it enters the valve body 1, allowing it to be quickly discharged from the outlet pipe 3, thus improving the discharge efficiency.

[0029] The opening and closing control assembly 5 includes an electric actuator 501, a valve stem 502, a stepped piston 503, and a retaining ring 504. The electric actuator 501 is mounted on the fixed frame 6. The electric actuator 501 is connected to the valve stem 502. The stepped piston 503 is installed at the end of the valve stem 502. A retaining ring 504 is sleeved at the connection between the valve stem 502 and the electric actuator 501.

[0030] In practice, the operation of the electric actuator 501 pushes and pulls the valve stem 502, allowing the stepped piston 503 to move within the valve body 1, thereby controlling the opening and closing of the valve body 1. The stepped piston 503 seals the stepped through groove, forming multiple sealing surfaces and improving sealing performance. When the stepped piston 503 blocks the inlet pipe 2, it can also seal the outlet pipe 3, thus preventing material backflow. When the stepped piston 503 seals the inlet pipe 2, a receiving cavity 9 is formed within the valve body 1, providing space for the stepped piston 503 to retract and store when the inlet pipe 2 is opened.

[0031] The fixing frame 6 has a guide hole, and the top of the locking component 8 slides in conjunction with the guide hole.

[0032] The locking assembly 8 includes a locking block 801, a guide rod 802, and a spring 803. The top end of the locking block 801 is connected to the guide rod 802. One side of the locking block 801 is slidably connected to the locking adjustment assembly 7. The top end of the guide rod 802 is slidably connected to the guide hole. The spring 803 is sleeved on the guide rod 802.

[0033] The locking block 801 has a wedge-shaped groove 805 on one side, and a movable groove 806 is connected below the wedge-shaped groove 805. The locking block 801 has a pressure groove 804 at the bottom.

[0034] The locking adjustment assembly 7 includes an electric telescopic rod 701, a connecting block 702, and a wedge block 703. The electric telescopic rod 701 is mounted on the valve body 1. The connecting block 702 is installed at the telescopic end of the electric telescopic rod 701. The wedge block 703 is fixedly connected to the top of the connecting block 702. The wedge block 703 slides in conjunction with the wedge groove 805.

[0035] In practice, the electric telescopic rod 701 retracts, causing the wedge block 703 to slide relative to the wedge groove 805. This causes the locking block 801 to move upward, compressing the spring 803. Consequently, the locking block 801 releases its obstruction of the retaining ring 504, allowing the stepped piston 503 to move back under the action of the electric push rod 501, opening the valve body 1. When the stepped piston 503 closes the valve body 1, the electric telescopic rod 701 extends, and the locking block 801 descends under the pressure of the spring 803. This causes the pressure groove 804 to engage with the extended end of the electric push rod 501, and the locking block 801 obstructs the retaining ring 504. Thus, even when the power is off, a large material pressure is generated in the pipe 2. Because the retaining ring 504 is obstructed by the locking block 801, it is difficult for the stepped piston 503 to move, thereby maintaining a seal and preventing material leakage.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A piston-type stepped locking device, comprising a valve body (1), an inlet pipe (2), and a discharge pipe (3), wherein one end of the valve body (1) is connected to the inlet pipe (2), and the bottom end of the valve body (1) is provided with the discharge pipe (3), characterized in that: The valve body (1) is connected to an opening and closing control component (5), a sealing cover (4) is installed at the end of the valve body (1), a fixing frame (6) is installed at the top of the valve body (1), a locking adjustment component (7) is provided on one side of the fixing frame (6), and a locking component (8) is installed on the fixing frame (6) and slidably connected to the locking adjustment component (7).

2. The piston-type stepped locking device according to claim 1, characterized in that: The valve body (1) has a stepped through groove, and the inlet pipe (2) has a diameter larger than the diameter at the connection with the stepped through groove.

3. The piston-type stepped locking device according to claim 2, characterized in that: The opening and closing control assembly (5) includes an electric actuator (501), a valve stem (502), a stepped piston (503), and a retaining ring (504). The electric actuator (501) is mounted on a fixed frame (6). The electric actuator (501) is connected to the valve stem (502). The stepped piston (503) is installed at the end of the valve stem (502). A retaining ring (504) is sleeved at the connection between the valve stem (502) and the electric actuator (501).

4. The piston-type stepped locking device according to claim 3, characterized in that: The fixing frame (6) has a guide hole, and the top of the locking component (8) slides in cooperation with the guide hole.

5. The piston-type stepped locking device according to claim 4, characterized in that: The locking assembly (8) includes a locking block (801), a guide rod (802) and a spring (803). The top of the locking block (801) is connected to the guide rod (802). One side of the locking block (801) is slidably connected to the locking adjustment assembly (7). The top of the guide rod (802) is slidably connected to the guide hole. The spring (803) is sleeved on the guide rod (802).

6. The piston-type stepped locking device according to claim 5, characterized in that: The locking block (801) has a wedge-shaped groove (805) on one side, and a movable groove (806) is connected below the wedge-shaped groove (805). The locking block (801) has a pressure groove (804) at the bottom.

7. The piston-type stepped locking device according to claim 6, characterized in that: The locking adjustment assembly (7) includes an electric telescopic rod (701), a connecting block (702), and a wedge block (703). The electric telescopic rod (701) is mounted on the valve body (1). The telescopic end of the electric telescopic rod (701) is equipped with a connecting block (702). The top of the connecting block (702) is fixedly connected to a wedge block (703). The wedge block (703) slides in conjunction with a wedge groove (805).

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