A quick-opening blind plate safety interlock device

Abstract

The present invention discloses a quick-opening blind plate safety interlock device, which relates to the technical field of blind plate structures, including a pressure relief bolt, an electromagnet, a control box, a mounting bracket and a pressure sensor; the mounting bracket is used to connect to the outer wall of the quick-opening blind plate, the electromagnet and the control box are both arranged on the mounting bracket, and the electromagnet is electrically connected to the control module in the control box; the pressure relief bolt and the pressure sensor are both installed on the outer wall of the quick-opening blind plate, and the pressure sensor is electrically connected to the control module in the control box, and a positioning groove is provided on the outer wall of the pressure relief bolt, and the positioning groove is used to match the extended shaft of the electromagnet. The quick-opening blind plate safety interlock device of the present invention has a simple structure, is easy to install, has a wide range of applications, and can be used in blind plates of various structures. Using a pressure sensor to detect the internal pressure of a container or a pipeline has higher sensitivity and accuracy, and can more effectively feedback the internal pressure of the container to the operator to avoid danger caused by misoperation.

Description

Technical Field

[0001] The invention relates to the technical field of blind plate structures, in particular to a quick-opening blind plate safety interlocking device. Background Art

[0002] A quick-opening blind flange is a mechanical device used on circular openings in pressure pipes or pressure vessels, enabling rapid opening and closing. It can be categorized by structural type, including clamp, tooth, snap, and pressure ring styles. Regardless of the design, each type consists of a blind flange seat, a blind flange cover, a hook or clamp, a sealing ring, and a safety interlock. The safety interlock is an essential component of all types of blind flanges, primarily used to alert the operator to residual pressure within the vessel or pipeline, allowing the operator to safely open the quick-opening blind flange.

[0003] According to relevant standards, the safety interlock device of the quick-opening blind plate must have the following two functions: 1. When the quick-opening blind plate reaches the predetermined closing position and the safety interlock device is in place, the equipment can be operated at increased pressure; 2. When the internal pressure of the equipment is completely released and the safety interlock device is disengaged, the quick-opening blind plate can be opened. Currently, most of the safety interlock devices of quick-opening blind plates only use simple pressure relief bolts to release the residual pressure inside the equipment. However, before the release, it is impossible to determine whether there is residual pressure in the pressure vessel or pipeline. If the pressure relief bolt is unscrewed rashly when there is a high internal pressure, the medium will leak or explode, which will bring great danger to the operator. There are also some safety interlock devices with a piston stopper mechanism inside the pressure relief bolt. When there is pressure inside the container or pipeline, the stopper can be pushed upward by the pressure to block the operating hole of the pressure relief bolt to remind the operator that there is pressure in the blind plate and the pressure relief bolt cannot be unscrewed. However, there are two problems with this device. First, the sealing ring of the sealing piston needs to be replaced frequently, otherwise leakage is likely to occur; second, when there is no internal pressure, the piston stopper needs to be reset by spring force, but this method is not reliable. Sometimes the piston will be stuck or the spring force will decrease. Failure to return the piston will also cause leakage. Summary of the Invention

[0004] The existing blind plate safety interlock device cannot provide the operator with accurate information on the pressure changes inside the container or pipeline when in use. The present invention provides a quick-opening blind plate safety interlock device with a simple structure and an electronic control function that can be correlated with the internal pressure.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a quick-opening blind plate safety interlock device, comprising a pressure relief bolt, an electromagnet, a control box, a mounting bracket and a pressure sensor; the mounting bracket is used to be connected to the outer wall of the quick-opening blind plate, the electromagnet and the control box are both arranged on the mounting bracket, and the electromagnet is electrically connected to a control module in the control box; the pressure relief bolt and the pressure sensor are both installed on the outer wall of the quick-opening blind plate, and the pressure sensor is electrically connected to the control module in the control box, and a positioning groove is provided on the outer wall of the pressure relief bolt, and the positioning groove is used to match the protruding shaft of the electromagnet.

[0007] Optionally, the mounting bracket includes an adjusting screw, a mounting plate and an adjusting nut, one end of the adjusting screw is connected to the quick-opening blind plate, the other end of the adjusting screw passes through the mounting plate, and an adjusting nut is provided on both sides of the mounting plate on the adjusting screw; the electromagnet and the control box are both arranged on the mounting plate.

[0008] Optionally, a control module and a battery are provided in the control box, and the battery is electrically connected to the control module.

[0009] Optionally, a switch, a pressure indicator light and a no-pressure indicator light are provided on the outer shell of the control box; the switch, the pressure indicator light and the no-pressure indicator light are all electrically connected to the control module; the switch is used to control the power on and off of the electromagnet.

[0010] Optionally, an elastic member is provided between the extension shaft of the electromagnet and the housing of the electromagnet, and the elastic member is used to keep the extension shaft of the electromagnet in an extended state.

[0011] Optionally, one end of the pressure relief nut is connected to the quick-opening blind plate through a thread.

[0012] Optionally, a sealing ring is provided on the root end face of the thread at one end of the pressure relief nut.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] The quick-opening blind plate safety interlock device of the present invention has a simple structure, is easy to install, and has a wide range of applications. It can be used in blind plates of various structures. It uses a pressure sensor to detect the internal pressure of a container or pipeline. Compared with traditional mechanical piston structures, it is more sensitive and accurate. It can more effectively feedback the internal pressure of the container to the operator, avoiding the danger of misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a front view of the quick-opening blind plate safety interlock device of the present invention;

[0017] Figure 2 This is an axonometric diagram of the quick-opening blind plate safety interlock device of the present invention;

[0018] Figure 3 This is a front view of the pressure relief bolt assembly in the quick-open blind plate safety interlock device of the present invention;

[0019] Figure 4 This is a structural diagram of the mounting bracket in the quick-opening blind plate safety interlock device of the present invention;

[0020] Figure 5 This is a front view of the quick-opening blind plate safety interlock device of the present invention when working under pressure;

[0021] Figure 6 This is a front view of the quick-opening blind plate safety interlock device of the present invention when it is opened without pressure;

[0022] Figure 7 This is an overall installation view of the quick-opening blind plate safety interlock device of the present invention on the quick-opening blind plate;

[0023] Figure 8 This is a top view of the overall installation of the quick-opening blind plate safety interlock device of the present invention on the quick-opening blind plate;

[0024] In the figure: 1. Pressure relief bolt; 2. Electromagnet; 3. Control box; 4. Mounting bracket; 5. Pressure sensor; 7. O-ring; 8. Adjusting screw; 9. Mounting plate; 10. Adjusting nut. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1 to 8As shown, this embodiment provides a quick-opening blind plate safety interlock device, including a pressure relief bolt 1, an electromagnet 2, a control box 3, a mounting bracket 4 and a pressure sensor; the mounting bracket 4 is used to connect to the outer wall of the quick-opening blind plate, the electromagnet 2 and the control box 3 are both arranged on the mounting bracket 4, and the electromagnet 2 is electrically connected to the control module in the control box 3; the pressure relief bolt 1 and the pressure sensor are both installed on the outer wall of the quick-opening blind plate, and the pressure sensor is electrically connected to the control module in the control box 3, and a positioning groove is provided on the outer wall of the pressure relief bolt 1, which is used to match the protruding shaft of the electromagnet 2.

[0027] In this specific embodiment, the mounting bracket 4 includes four adjustment screws 8, a mounting plate 9, and eight adjustment nuts 10. One end of the adjustment screw 8 is threadedly connected to the quick-opening blind plate. The mounting plate 9 is surrounded by four first through-holes, through which the other end of the adjustment screw 8 passes. An adjustment nut 10 is provided on each side of the adjustment screw 8. The electromagnet 2 and control box 3 are both mounted on the mounting plate 9. By changing the position of the adjustment nut 10 on the adjustment screw 8, the height of the device can be adjusted.

[0028] An elastic member is disposed between the extension shaft of electromagnet 2 and its housing. This elastic member, specifically a coil spring, is used to maintain the extension shaft of electromagnet 2 in the extended position. When power is off, the spring force of the coil spring forces the extension shaft forward into the positioning slot of pressure relief bolt 1. When power is applied, the magnetic force retracts the extension shaft.

[0029] The lower part of the pressure relief bolt 1 is a threaded structure, which can be connected to the threaded hole on the upper surface of the blind plate cover during installation. An O-ring 7 is provided at the connection surface between the pressure relief bolt 1 and the blind plate cover to realize the sealing function of the two. Two vertically connected circular holes are provided on the outer surface and bottom surface of the thread. Before the operator opens the blind plate, after observing that the pressure-free indicator light of the control box 3 lights up, the pressure relief bolt 1 can be loosened one or two turns. When the circular hole on the outer surface of the thread leaks, it can be observed whether there is gas or medium flowing out. If the above phenomenon does not occur, it means that there is no pressure in the container at this time and the blind plate can be opened safely. The use of the above method can avoid the danger of accidentally opening the blind plate when the indicator light of the control box 3 fails. There is a cylindrical section with a smaller diameter in the middle of the pressure relief bolt 1 as a positioning groove. When the container or pipeline is operating normally under pressure, the extended shaft of the electromagnet 2 can be inserted into the positioning groove. At this time, the operator cannot unscrew the pressure relief bolt 1 from the blind plate cover. In addition, two mutually perpendicular operating holes are provided on the upper part of the pressure relief bolt 1 , and the operator can insert a rotary wrench into them according to the use orientation to complete the operation of screwing in or out the pressure relief bolt 1 .

[0030] The control box 3 is provided with a control module and a battery, and the battery is electrically connected to the control module. The control module can adopt a PLC controller.

[0031] The outer shell of the control box 3 is provided with a switch, a pressure indicator light and a no-pressure indicator light; the switch, the pressure indicator light and the no-pressure indicator light are all electrically connected to the control module; the switch is used to control the power on and off of the electromagnet 2.

[0032] Before opening the blind plate, you can first press the switch on the upper surface of the control box 3. At this time, the various electrical components can be activated to start working. If the pressure sensor detects that the container or pressure pipe component is pressureless, it will feed back the pressure-free signal to the PLC controller of the control box 3. At this time, the battery is instructed to power the electromagnet 2, and the extension shaft of the electromagnet 2 retracts backward. At the same time, the pressure-free indicator light on the control box 3 lights up, and the operator can now open the blind plate. If the pressure indicator light is on, it means that the signal detected by the pressure sensor is a pressure signal. The PLC controller will not issue a power supply instruction to the electromagnet 2. The extension shaft of the electromagnet 2 will be stuck in the positioning range of the pressure relief bolt 1, and the operator will not be able to unscrew the pressure relief bolt 1. In addition, if neither indicator light is on, it means that the battery may be low or there is a problem with other electrical components, which need to be repaired.

[0033] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0034] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A quick-opening blind plate safety interlock device, characterized in that: It includes a pressure relief bolt, an electromagnet, a control box, a mounting bracket and a pressure sensor; the mounting bracket is used to connect to the outer wall of the quick-opening blind plate, the electromagnet and the control box are both arranged on the mounting bracket, and the electromagnet is electrically connected to the control module in the control box; the pressure relief bolt and the pressure sensor are both installed on the outer wall of the quick-opening blind plate, and the pressure sensor is electrically connected to the control module in the control box, and a positioning groove is provided on the outer wall of the pressure relief bolt, and the positioning groove is used to match the extended shaft of the electromagnet; The mounting bracket includes an adjusting screw, a mounting plate and an adjusting nut. One end of the adjusting screw is connected to the quick-opening blind plate, and the other end of the adjusting screw passes through the mounting plate. The adjusting screw is provided with an adjusting nut on both sides of the mounting plate. The electromagnet and the control box are both provided on the mounting plate. The lower part of the pressure relief bolt is a threaded structure. The threaded outer surface and bottom surface of the pressure relief bolt are provided with two vertically connected circular holes. The gas or medium in the container can leak out from the circular holes on the threaded outer surface under pressure.

2. The quick-opening blind plate safety interlock device according to claim 1, characterized in that: A control module and a battery are provided in the control box, and the battery is electrically connected to the control module.

3. The quick-opening blind plate safety interlock device according to claim 2, characterized in that: The control box housing is provided with a switch, a pressure indicator light and a no-pressure indicator light; the switch, the pressure indicator light and the no-pressure indicator light are all electrically connected to the control module; the switch is used to control the power on and off of the electromagnet.

4. The quick-opening blind plate safety interlock device according to claim 1, characterized in that: An elastic member is provided between the extension shaft of the electromagnet and the housing of the electromagnet, and the elastic member is used to keep the extension shaft of the electromagnet in an extended state.

5. The quick-opening blind plate safety interlock device according to claim 1, characterized in that: One end of the pressure relief nut is connected to the quick-opening blind plate through a thread.

6. The quick-opening blind plate safety interlock device according to claim 5, characterized in that: One end of the pressure relief nut is provided with a sealing ring on the root end surface of the thread.

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