Butterfly valve hydraulic quick closing execution device

Abstract

This invention discloses a hydraulic rapid shut-off actuator for a butterfly valve, comprising a first control oil circuit and a second control oil circuit. The main pipeline of the first control oil circuit is connected to the connection ports of a normally open shut-off valve, a first power-off self-protecting solenoid valve, a second power-off self-protecting solenoid valve, and a first high-flow hydraulic control check valve. This hydraulic rapid shut-off actuator for the butterfly valve, by activating the rapid shut-off oil circuit of the first control oil circuit, the first self-protecting solenoid valve, and the second self-protecting solenoid valve, allows the first high-flow hydraulic control check valve to be opened and rapidly shut off in any power-off state, thus initiating the servo cylinder for rapid valve closure. However, to prevent the valve plate from impacting when the valve position is close to zero due to excessively rapid valve closure, the rapid shut-off oil circuit of the first control oil circuit is closed via an operating procedure, and the regulating oil circuit of the second control oil circuit is switched to adjust the oil circuit speed, thereby achieving both ensuring the closing speed and avoiding valve plate impact.

Description

Technical Field

[0001] This invention relates to the field of anti-collision technology for hydraulic cylinder butterfly valves, specifically to a hydraulic quick-shutdown actuator for butterfly valves. Background Technology

[0002] Currently, in the petrochemical industry, high-temperature inlet butterfly valves commonly employ mechanical buffering with hydraulic cylinders for self-protection. The buffering device works by limiting flow, using the piston or cylinder to seal off a portion of the oil between the piston and cylinder head at the end of its stroke, forcing it to squeeze out through small holes or slits. This generates significant resistance, braking the working parts and gradually slowing their movement, thus preventing the piston and cylinder head from colliding. However, this structure is susceptible to pressure changes. In hydraulic systems, increased system pressure can easily cause impact to the valve plate, often resulting in severe damage due to the rapid closure of the valve, leading to economic losses and serious safety hazards. Conversely, decreased system pressure may not meet the requirements for rapid closure, making it difficult to achieve both rapid closure and valve plate avoidance.

[0003] Therefore, in response to the above problems, our company has developed a hydraulic quick-closing actuator for butterfly valves to meet the requirement of quickly closing the butterfly valve (closing within 1 second) while avoiding the phenomenon of the valve plate being impacted during rapid closure. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a hydraulic rapid shut-off actuator for butterfly valves, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a butterfly valve hydraulic rapid shut-off actuator, comprising a first oil control circuit and a second oil control circuit. The main pipeline of the first oil control circuit is respectively connected to the connection ports of a normally open shut-off valve, a first power-off self-protecting solenoid valve, a second power-off self-protecting solenoid valve, and a first high-flow hydraulic control check valve. The outlet pipe of the first high-flow hydraulic control check valve is connected to the butterfly valve. The main pipeline of the second oil control circuit is respectively connected to the connection port of a third power-off self-protecting solenoid valve. The outlet pipe of the third power-off self-protecting solenoid valve is connected to a proportional servo valve. The two connection ports of the proportional servo valve are respectively connected to a first superimposed hydraulic lock and a second superimposed hydraulic lock. The outlet pipe of the first superimposed hydraulic lock is connected to the connection pipes of the first high-flow hydraulic control check valve and the butterfly valve. The outlet pipe of the second superimposed hydraulic lock is respectively connected to the second high-flow hydraulic control check valve and the butterfly valve. The pipeline of the second high-flow hydraulic control check valve is connected to the pipeline of a pressure gauge switch. The other end of the pipeline of the pressure gauge switch is connected to a pressure gauge.

[0008] Preferably, the pipeline of the second superimposed hydraulic lock is connected to the connecting pipe of the proportional servo valve and the first superimposed hydraulic lock, and the pipeline of the first superimposed hydraulic lock is connected to the connecting pipe of the proportional servo valve and the second superimposed hydraulic lock.

[0009] Preferably, the outlet pipe of the normally open shut-off valve is connected to the inlet pipe of the accumulator and the normally closed shut-off valve, respectively.

[0010] Preferably, the outlet pipe of the first high-flow hydraulic control check valve is connected to the pressure transmitter, the connecting pipe of the first high-flow hydraulic control check valve and the pressure transmitter is connected to the connecting pipe of the second high-flow hydraulic control check valve and the pressure gauge switch, and the end of the connecting pipe of the first high-flow hydraulic control check valve and the pressure transmitter is connected to the pipeline of the first power failure self-protection solenoid valve and the pipeline of the second power failure self-protection solenoid valve in sequence.

[0011] (III) Beneficial Effects

[0012] This invention provides a hydraulic quick-shutdown actuator for a butterfly valve. It has the following advantages:

[0013] (1) The hydraulic quick-closing actuator of the butterfly valve, through the setting of the first control oil circuit, activates the quick-closing oil circuit of the first control oil circuit. The first self-holding solenoid valve and the second self-holding solenoid valve are redundant self-holding solenoid valves, so that the first large flow hydraulic control check valve can be opened under any power failure state to realize the quick-closing of the valve, so that it enters the servo cylinder to realize the quick-closing of the valve. However, in order to prevent the valve plate from impacting when the valve position is close to zero (which can be set), the quick-closing oil circuit of the first control oil circuit is closed by the operation program, and the second control oil circuit is switched to adjust the oil circuit to adjust the speed of the oil circuit control (which can be set), thereby achieving the effect of ensuring the closing speed and avoiding the impact of the valve plate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the butterfly valve connecting the first and second oil control circuits of the present invention.

[0015] In the diagram: First oil control circuit P1; Second oil control circuit P2; First normally open shut-off valve YM5; Normally closed shut-off valve YM5'; Accumulator A1.3; First power failure self-protection solenoid valve DC5; Second power failure self-protection solenoid valve DC6; Third power failure self-protection solenoid valve DC4; Pressure gauge G2; Pressure gauge switch YM6; Pressure transmitter KP3; First high-flow hydraulic control check valve YKD7; Second high-flow hydraulic control check valve YKD8; Zero-leakage solenoid valve DC4; Proportional servo valve BL1; First stacked hydraulic lock YKD1; Second stacked hydraulic lock YDK2. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, the present invention provides a technical solution: a butterfly valve hydraulic quick-shutdown actuator, including a first oil control circuit P1 and a second oil control circuit P2. The main pipeline of the first oil control circuit P1 is respectively connected to the connection ports of a normally open shut-off valve YM5, a first power-off self-holding solenoid valve DC5, a second power-off self-holding solenoid valve DC6, and a first high-flow hydraulic control check valve YKD7. By setting the self-holding solenoid valves DC5 and DC6 as redundant self-holding solenoid valves, YKD7 and YKD7 can be opened under any power-off state. The DB high-flow hydraulic control check valve enables rapid valve shut-off, directing it into the servo cylinder for rapid valve closure. The outlet pipe of the first high-flow hydraulic control check valve YKD7 is connected to the butterfly valve. The main pipe of the second control circuit P2 is connected to the connection port of the third power-off self-protection solenoid valve DC4. The outlet pipe of the third power-off self-protection solenoid valve DC4 is connected to the proportional servo valve BL1. The two connection ports of the proportional servo valve BL1 are respectively connected to the first stacked hydraulic lock YKD1 and the second stacked hydraulic lock YDK2. The outlet pipe of the first stacked hydraulic lock YKD1 is connected to the connection pipes of the first high-flow hydraulic control check valve YKD7 and the butterfly valve. The second stacked... The outlet pipe of hydraulic lock YDK2 is connected to the second high-flow hydraulic control check valve YKD8 and the butterfly valve respectively. The pipeline of the second superimposed hydraulic lock YDK2 is connected to the connecting pipe of the proportional servo valve BL1 and the first superimposed hydraulic lock YKD1. The pipeline of the first superimposed hydraulic lock YKD1 is connected to the connecting pipe of the proportional servo valve BL1 and the second superimposed hydraulic lock YDK2. The pipeline of the second high-flow hydraulic control check valve YKD8 is installed and connected to the pipeline of pressure gauge switch YM6. The other end of the pipeline of pressure gauge switch YM6 is installed and connected to pressure gauge G2. Through the setting of pressure gauge G2, the first oil control circuit P can be adjusted at any time. The effect of pressure monitoring in pipeline 1 is as follows: the outlet pipe of normally open shut-off valve YM5 is connected to the inlet pipe of accumulator A1.3 and normally closed shut-off valve YM5' respectively; the outlet pipe of the first high-flow hydraulic control check valve YKD7 is connected to pressure transmitter KP3; the connecting pipe of the first high-flow hydraulic control check valve YKD7 and pressure transmitter KP3 is connected to the connecting pipe of the second high-flow hydraulic control check valve YKD8 and pressure gauge switch YM6; and the end of the connecting pipe of the first high-flow hydraulic control check valve YKD7 and pressure transmitter KP3 is connected to the pipeline of the first power failure self-protection solenoid valve DC5 and the pipeline of the second power failure self-protection solenoid valve DC6 in sequence.

[0018] During normal operation and adjustment, the oil circuits of the first power-off self-protecting solenoid valve DC5 and the second power-off self-protecting solenoid valve DC6 are closed. The opening or closing of the valve is controlled by the proportional servo valve in the second control oil circuit P2. Only when the inlet butterfly valve malfunctions and requires a 1-second rapid shut-off, the program activates the fast-closing oil circuit of the first control oil circuit P1. The first self-protecting solenoid valve DC5 and the second self-protecting solenoid valve DC6 are redundant self-protecting solenoid valves, allowing either one to open the first high-flow hydraulic control check valve YKD7 and the second high-flow hydraulic control check valve YKDB in any power-off state to achieve rapid valve shut-off. This allows the valve to enter the servo cylinder, achieving rapid valve shut-off. However, to prevent the valve plate from impacting when the valve position is close to zero (configurable), the P1 rapid shut-off oil circuit is closed by operating the program, and the P2 adjustment oil circuit is switched to adjust the oil circuit control speed (configurable). This ensures both the closing speed and avoids valve plate impact. Furthermore, all content not described in detail in this manual belongs to the prior art known to those skilled in the art.

[0019] In summary, this butterfly valve hydraulic rapid shut-off actuator, through the setting of the first oil control circuit P1, activates the rapid shut-off oil circuit of the first oil control circuit P1. The first self-holding solenoid valve DC5 and the second self-holding solenoid valve DC6 are redundant self-holding solenoid valves, so that in the absence of power of either one, the first large-flow hydraulic control check valve YKD7 and the second large-flow hydraulic control check valve YKDB large-flow hydraulic control check valve can be opened to achieve rapid valve shut-off, so that they enter the servo cylinder to achieve rapid valve shut-off. However, in order to prevent the valve plate from impacting when the valve position is close to zero due to excessively rapid valve closing (which can be set), the P1 rapid shut-off oil circuit is closed by the operation program, and the P2 regulating oil circuit is switched to adjust the oil circuit control speed (which can be set), thereby achieving both ensuring the closing speed and avoiding the impact effect of the valve plate.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic quick-shutdown actuator for a butterfly valve, comprising a first oil control circuit (P1) and a second oil control circuit (P2), characterized in that: The main pipeline of the first oil control circuit (P1) is connected to the connection ports of the normally open shut-off valve (YM5), the first power failure self-protection solenoid valve (DC5), the second power failure self-protection solenoid valve (DC6), and the first high-flow hydraulic control check valve (YKD7), respectively. The outlet pipe of the first high-flow hydraulic control check valve (YKD7) is connected to the butterfly valve. The main pipeline of the second oil control circuit (P2) is connected to the connection port of the third power failure self-protection solenoid valve (DC4), and the outlet pipe of the third power failure self-protection solenoid valve (DC4) is connected to the proportional servo valve (BL1). The two connecting ports of the proportional servo valve (BL1) are respectively connected to the first superimposed hydraulic lock (YKD1) and the second superimposed hydraulic lock (YDK2). The outlet pipe of the first stacked hydraulic lock (YKD1) is connected to the connecting pipe of the first high-flow hydraulic control check valve (YKD7) and the butterfly valve; The outlet pipe of the second stacked hydraulic lock (YDK2) is connected and installed to the second large flow hydraulic control check valve (YKD8) and the butterfly valve respectively; The pipeline of the second high-flow hydraulic control check valve (YKD8) is installed and connected to the pipeline of the pressure gauge switch (YM6), and the other end of the pipeline of the pressure gauge switch (YM6) is installed and connected to the pressure gauge (G2). The pipeline of the second superimposed hydraulic lock (YDK2) is connected to the connecting pipe of the proportional servo valve (BL1) and the first superimposed hydraulic lock (YKD1), and the pipeline of the first superimposed hydraulic lock (YKD1) is connected to the connecting pipe of the proportional servo valve (BL1) and the second superimposed hydraulic lock (YDK2). The device is configured to: activate the first oil control circuit (P1) to achieve rapid shutdown when rapid shutdown is required; and close the first oil control circuit (P1) and switch to the second oil control circuit (P2) when the valve position is close to zero, and control the valve closing speed through the proportional servo valve (BL1) to avoid valve plate impact.

2. The hydraulic quick-shutdown actuator for a butterfly valve according to claim 1, characterized in that: The outlet pipe of the first high-flow hydraulic control check valve (YKD7) is connected to the pressure transmitter (KP3). The connecting pipe between the first high-flow hydraulic control check valve (YKD7) and the pressure transmitter (KP3) is connected to the connecting pipe between the second high-flow hydraulic control check valve (YKD8) and the pressure gauge switch (YM6). The end of the connecting pipe between the first high-flow hydraulic control check valve (YKD7) and the pressure transmitter (KP3) is connected in sequence to the pipeline of the first power failure self-protection solenoid valve (DC5) and the pipeline of the second power failure self-protection solenoid valve (DC6).

3. The butterfly valve hydraulic quick-shutdown actuator according to claim 1, characterized in that: The outlet pipe of the normally open shut-off valve (YM5) is connected to the inlet pipe of the accumulator (A1.3) and the normally closed shut-off valve (YM5'), respectively.

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