Pipe sealing blind flange

Abstract

The present invention discloses a pipeline sealing blind plate, which comprises a blind plate body and a flange ring. The blind plate body and the flange ring are an integral whole, and the flange ring is used to install it at the position of the working pipeline opening. A blocking groove is provided at the middle position of the blind plate body, and the through crack generated in the blind plate body is disconnected at the position of the blocking groove. As shown in the figure, when the longitudinal crack penetrates the blind plate body, it will pass through the blocking groove, so as to ensure the temporary sealing performance. After the blind plate body is removed, it can be checked whether the blind plate body is damaged. For this pipeline sealing blind plate, by setting the blocking groove, when the longitudinal crack penetrates the blind plate body, it will pass through the blocking groove. Therefore, the crack will not penetrate the entire blind plate body, so as to ensure the temporary sealing performance. After the blind plate body is removed, it can be checked whether the blind plate body is damaged, avoiding dangerous accidents during the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of blind plates, specifically a pipeline sealing blind plate. Background Art

[0002] The formal name of a blind disk is a flange cover, and some are also called blind flanges or pipe plugs. It is a flange without a hole in the middle, used to block the pipeline opening, and its function is the same as that of a head and a pipe cap. However, the blind plate seal is a detachable sealing device, while the seal of the head is not intended to be opened again. There are many types of seal surface forms, including flat surface, convex surface, concave-convex surface, tenon-groove surface, and ring joint surface;

[0003] Blind plates are mainly used to completely isolate the production medium to prevent accidents caused by incomplete closing of the cut-off valve, which may affect production. Blind plates should be installed at the positions where isolation is required. Since the blind plate must be removed after use, a blind plate valve has emerged accordingly. However, like the isolation valve, the blind plate valve also has problems such as incomplete closing, which may affect production and cause accidents;

[0004] Similarly, during the long-term use of the blind plate, there may be certain cracks on its surface. If the cracks penetrate longitudinally, it will also affect the overall sealing performance of the blind plate. Sealing in a pipeline transporting toxic gases will also cause serious safety accidents. Therefore, before use, it is necessary to check the entire blind plate to observe whether there is damage to the blind plate. Most of the existing detection technologies are for detecting blind plates that have already leaked. However, during use, the blind plate will directly contact toxic gases, and its surface is prone to corrosion or cracks, which will pose certain accident risks at this time. However, it is difficult for workers to judge it in advance, so the risk coefficient will increase accordingly. For this reason, we propose a pipeline sealing blind plate. Summary of the Invention

[0005] The purpose of the present invention is to provide a pipeline sealing blind plate to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A pipeline sealing blind plate, including a blind plate body and a flange ring. The blind plate body and the flange ring are an integral whole, and the flange ring is used to install it at the position of the working pipeline opening. A blocking groove is provided at the middle position of the blind plate body. When a through crack generated in the blind plate body breaks at the position of the blocking groove, when a longitudinal crack penetrates the blind plate body, it will pass through the blocking groove. Therefore, the crack will not penetrate the entire blind plate body, thus ensuring the temporary sealing performance.

[0007] Preferably, the shape of the blocking groove is set as a spiral shape, and the maximum diameter of the spiral is the same as the diameter of the corresponding installed pipeline, which can block cracks while reducing the change in the hardness and strength of the blind plate body.

[0008] Preferably, a detection groove is provided on the side of the blind plate body from outside to inside, and the detection groove is communicated with the inside of the blocking groove. A detector is sealedly installed at the position of the detection groove, and a poisonous gas detection probe is installed below the detector, and the poisonous gas detection probe extends into the inside of the detection groove.

[0009] Preferably, a treatment groove is provided on the side of the blind plate body from outside to inside, and the inside of the treatment groove is communicated with the inside of the blocking groove. A communicating pipe is installed at the position of the treatment groove, a reaction pool is installed on the side surface of the blind plate body, the communicating pipe communicates with the inside of the reaction pool, and an electromagnetic valve A is installed between the reaction pool and the treatment groove by using the communicating pipe.

[0010] Preferably, the communicating pipe is a tee pipe, and an electromagnetic valve B is installed at its inlet position. Water is introduced into the inside of the blocking groove at the inlet position. A test paper is placed on the circular cross-section of the blind plate body. When it is difficult to detect with the naked eye, close the electromagnetic valve A, open the electromagnetic valve B, fill it with water, and then continuously inflate it. After a period of time, if the test paper does not react, it means that there are no cracks in the blind plate body.

[0011] Preferably, a pressure detection probe is installed below the detector, and an air extraction valve is installed at the top of the communicating pipe. The air outlet of the air extraction valve is communicated with the communicating pipe. When the staff shuts off the main switch, the air pressure between the pipeline and the blind plate body is not large, and it is difficult for gas to enter the inside of the reaction pool for reaction. Therefore, by using the air extraction valve to increase the pressure inside the blocking groove, the poisonous gas is squeezed into the inside of the reaction pool.

[0012] Preferably, a controller is embedded in the blind plate body for controlling the coordinated use of the electromagnetic valve A, the electromagnetic valve B, and the air extraction valve.

[0013] Preferably, a U-shaped member is fixedly connected to the side surface of the blind plate body, and the U-shaped member and the blind plate body are an integral whole, which is convenient for lifting and moving.

[0014] Preferably, the reaction pool is located inside the U-shaped member, and a conduit is communicated inside the reaction pool. The air outlet of the conduit extends to the position of the horizontal plate of the U-shaped member, so that the reaction liquid will not enter the inside of the blocking groove.

[0015] Preferably, the connection between the two side plates and the horizontal plate of the U-shaped member is set as an arc shape, which is convenient for rotating and flipping the blind plate body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting a blocking groove, when a longitudinal crack penetrates the blind plate body, it will pass through the blocking groove. Therefore, the crack will not penetrate the entire blind plate body, thus ensuring temporary sealing performance. After the blind plate body is removed, it is possible to check whether the blind plate body is damaged, avoiding dangerous accidents during operation.

[0018] 2. By setting a gas detection probe, if there are certain cracks during the use of the blind plate body, the gas detection probe will detect the gas, and then the detector will alarm, reminding the staff to take certain measures to avoid certain damage.

[0019] 3. By setting a reaction tank, a reaction liquid that reacts with the gas is placed inside the reaction tank, and the reaction liquid is used to completely react the gas, making the treatment more complete, avoiding the problem that if the blind plate body is directly removed after blocking, it will still cause poisoning of the staff.

[0020] 4. By setting a controller, solenoid valve A, solenoid valve B and an air extraction valve to cooperate with each other, it is more convenient to use and has a higher degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a sectional view of the structure of the present invention at the blocking groove;

[0023] Figure 3 is a side sectional view of the structure of the present invention;

[0024] Figure 4 is a schematic diagram of the three-dimensional structure of the back of the present invention;

[0025] Figure 5 is a ladder diagram of the present invention;

[0026] Figure 6 is a circuit diagram of the present invention.

[0027] In the figure: 1 - blind plate body; 2 - flange ring; 3 - blocking groove; 4 - detection groove; 5 - detector; 6 - gas detection probe; 7 - treatment groove; 8 - connecting pipe; 9 - reaction tank; 10 - solenoid valve A; 11 - pressure detection probe; 12 - air extraction valve; 13 - controller; 14 - solenoid valve B; 15 - U-shaped part; 16 - conduit. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1-6 , the present invention provides a technical solution: a pipeline sealing blind plate, including a blind plate body 1 and a flange ring 2. The blind plate body 1 and the flange ring 2 are an integral whole. The flange ring 2 is used to install it at the position of the working pipeline opening. A blocking groove 3 is provided at the middle position of the blind plate body 1. When a through crack generated in the blind plate body 1 breaks at the position of the blocking groove 3, as Figure 2 shown, when a longitudinal crack penetrates the blind plate body 1, it will pass through the blocking groove 3. Therefore, the crack will not penetrate the entire blind plate body 1, thus ensuring the temporary sealing performance. After the blind plate body 1 is removed, it can be checked whether the blind plate body 1 is damaged, avoiding dangerous accidents during operation.

[0030] As Figure 2 shown, the shape of the blocking groove 3 is set as a spiral shape. The maximum diameter of the spiral is the same as the diameter of the corresponding installed pipeline. The thickness of the spiral pipeline and the distance between the spirals are the same. While the crack penetrates, it can not only block the crack, but also reduce the change of the hardness and strength of the blind plate body 1.

[0031] A detection groove 4 is provided on the side of the blind plate body 1 from outside to inside. The detection groove 4 is internally connected to the blocking groove 3. A detector 5 is hermetically installed at the position of the detection groove 4. A gas detection probe 6 is installed below the detector 5. The gas detection probe 6 extends into the interior of the detection groove 4. If a crack occurs in the blind plate body 1, the poisonous gas will enter the interior of the blocking groove 3 along the crack. Since the blocking groove 3 is internally connected to the detection groove 4, the gas detection probe 6 will detect the poisonous gas. At this time, the detector 5 will give an alarm display to remind the staff that the blind plate body 1 is damaged.

[0032] A treatment groove 7 is provided on the side of the blind plate body 1 from outside to inside. The interior of the treatment groove 7 is internally connected to the blocking groove 3. A connecting pipe 8 is installed at the position of the treatment groove 7. A reaction pool 9 is installed on the side of the blind plate body 1. The interior of the reaction pool 9 is filled with a liquid that can react with the poisonous gas to react and dilute the released poisonous gas. The connecting pipe 8 communicates with the interior of the reaction pool 9. An electromagnetic valve A10 is installed between the reaction pool 9 and the treatment groove 7 through the connecting pipe. The opening of the electromagnetic valve A10 is started only when the gas detection probe 6 detects the poisonous gas and the detector 5 starts to give an alarm, so that the poisonous gas enters the interior of the reaction pool 9 through the connecting pipe 8.

[0033] The connecting pipe 8 is a three-way pipe, and a solenoid valve B14 is installed at its inlet position. Water is introduced into the inside of the blocking groove 3 from the inlet position. A test strip is placed on the circular cross-section of the blind plate body 1. When it is difficult for some people to detect, the solenoid valve A10 is closed, the solenoid valve B14 is opened, and its inside is filled with water. Then, it is continuously inflated. After a period of time, if the test paper shows no reaction, it means that the blind plate body 1 has no cracks. The water inside is pumped out, and then the solenoid valve B is closed.

[0034] A pressure detection probe 11 is installed below the detector 5. An air extraction valve 12 is installed at the top of the connecting pipe 8. The air outlet of the air extraction valve 12 is communicated with the connecting pipe 8. The poisonous gas reacts with the reaction liquid inside the reaction pool 9. When the staff shuts off the main switch, the air pressure between the pipeline and the blind plate body 1 is not large, and it is difficult for the gas to enter the inside of the reaction pool 9 for reaction. Therefore, by using the air extraction valve 12 to increase the pressure inside the blocking groove 3, the poisonous gas is squeezed into the inside of the reaction pool 9, so that the poisonous gas reacts with the liquid inside the reaction pool 9. When the detector 5 does not give an alarm, it means that the poisonous gas inside has basically dissipated.

[0035] A controller 13 is embedded inside the blind plate body 1, which is used to control the coordinated use of the solenoid valve A10, the solenoid valve B14 and the air extraction valve 12. The controller 13 uses PLC logic control. When the poisonous gas detection probe 6 detects the poisonous gas, the corresponding relay switch is set as SB1. When the pressure detection probe 11 detects that the pressure value reaches a certain level, its corresponding relay switch is set as SB2. At this time, SB1 and SB2 are closed at the same time, and the relay corresponding to the solenoid valve A10 is opened. The solenoid valve A10 is normally closed, so that the gas inside enters the inside of the reaction pool 9 and reacts fully with it. The pressure gradually decreases. When it reaches a lower value, the air extraction valve 12 is opened, the solenoid valve A10 is closed, and air is introduced into the inside of the blocking groove 3. When the air pressure reaches a certain value, the air extraction valve 12 is closed, the solenoid valve A10 is opened, and a cycle is gradually formed until the poisonous gas detected by the poisonous gas detection probe 6 is lower than a certain value. At this time, the air extraction valve 12 and the solenoid valve A10 are closed to stop the cycle.

[0036] As Figure 1 As shown, a U-shaped part 15 is fixedly connected to the side surface of the blind plate body 1. The U-shaped part 15 and the blind plate body 1 are an integral body. The U-shaped part 15 can be used as a handle to lift the entire blind plate body 1 for movement. At the same time, it can also turn the whole over and pad up the blind plate body 1 to facilitate the installation of the blind plate body 1.

[0037] The reaction pool 9 is located inside the U-shaped part 15. The reaction pool 9 is communicated with a conduit 16 inside. The air outlet of the conduit 16 extends towards the horizontal plate position of the U-shaped part 15, so that the reaction liquid will not enter the inside of the blocking groove 3.

[0038] The connection between the two side plates and the position of the cross plate of the U-shaped part 15 is set in an arc shape, which facilitates the rotation and flipping of the blind plate body 1.

[0039] Toxic gas enters the interior of the blind plate body 1 through the penetrating crack. The toxic gas detection probe 6 detects the toxic gas. At this time, I0.0 is closed, and the corresponding electromagnetic relay M0.0 operates. At this time, the switch corresponding to M0.0 is closed. When the pressure detection probe 11 detects a certain pressure, the switch I0.1 is closed. At this time, QO.O is closed, and the solenoid valve A10 is opened. The normally closed switch corresponding to Q0.O is opened. At this time, Q0.1 is in a normal closed state. When the pressure detection value of the pressure detection probe 11 decreases, the corresponding normally open switch is opened, the normally closed switch is closed, and Q0.1 is closed, that is, the air extraction valve 12 extracts air to increase the internal pressure until the pressure detection probe 11 detects a certain value again, and it repeats until the internal toxic gas content drops to the lowest. I0.0 is opened, the entire circuit is disconnected, and the blind plate body 1 can be removed.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Pipeline sealing blind plate, comprising a blind plate body (1) and a flange ring (2), the blind plate body (1) and the flange ring (2) being an integral whole, and the flange ring (2) being used to install it at the position of the working pipeline opening, characterized in that: A blocking groove (3) is provided at the middle position of the blind plate body (1), so that the through crack generated in the blind plate body (1) is disconnected at the position of the blocking groove (3); A detection groove (4) is provided on the side of the blind plate body (1) from outside to inside. The detection groove (4) is communicated with the inside of the blocking groove (3). A detector (5) is sealed and installed at the position of the detection groove (4). A poisonous gas detection probe (6) is installed below the detector (5), and the poisonous gas detection probe (6) extends into the inside of the detection groove (4); A treatment groove (7) is provided on the side of the blind plate body (1) from outside to inside. The inside of the treatment groove (7) is communicated with the inside of the blocking groove (3). A connecting pipe (8) is installed at the position of the treatment groove (7). A reaction pool (9) is installed on the side surface of the blind plate body (1). The connecting pipe (8) communicates with the inside of the reaction pool (9). An electromagnetic valve A (10) is installed between the reaction pool (9) and the treatment groove (7) by using the connecting pipe; 2. The pipeline sealing blind plate according to claim 1, wherein: The shape of the blocking groove (3) is set as a spiral shape, and the maximum diameter of its spiral is the same as the diameter of the corresponding installed pipeline; 3. The pipeline sealing blind plate according to claim 1, wherein: The connecting pipe (8) is a tee pipe, and an electromagnetic valve B (14) is installed at its inlet position. Water is introduced into the inside of the blocking groove (3) at the inlet position, and a test paper is placed on the circular section of the blind plate body (1); 4. The pipeline sealing blind plate according to claim 3, wherein: A pressure detection probe (11) is installed below the detector (5), and an air extraction valve (12) is installed at the top end of the connecting pipe (8). The air outlet of the air extraction valve (12) is communicated with the connecting pipe (8); 5. The pipeline sealing blind plate according to claim 4, wherein: A controller (13) is embedded in the blind plate body (1) to control the coordinated use of the electromagnetic valve A (10), the electromagnetic valve B (14) and the air extraction valve (12); 6. The pipeline sealing blind plate according to claim 1, wherein: A U-shaped part (15) is fixedly connected to the side surface of the blind plate body (1), and the U-shaped part (15) and the blind plate body (1) are an integral body; 7. The pipeline sealing blind plate according to claim 6, wherein: The reaction pool (9) is located inside the U-shaped part (15). A conduit (16) is communicated inside the reaction pool (9), and the air outlet of the conduit (16) extends to the position of the horizontal plate of the U-shaped part (15); 8. The pipeline sealing blind plate according to claim 7, wherein: The connection between the two side plates and the horizontal plate position of the U-shaped part (15) is set as an arc shape;

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