Safety pressure relief interlocking mechanism of quick-opening blind plate

Abstract

The utility model relates to a safety pressure relief interlocking mechanism of a quick-opening blind plate, and belongs to the field of quick pressure relief equipment. Comprising a pressure relief pipe (14), a pressure relief valve (7) and a lock rod (9), the pressure relief pipe (14) penetrates into a quick-opening door flange (1), the pressure relief valve (7) is arranged on the pressure relief pipe (14), and a pressure relief cam (8) is arranged at the rotating end of a switch handle (3) of the pressure relief valve (7); the quick-opening blind plate (6) and the blind plate end cover (4) are provided with insertion holes in the radial direction, the lock rod (9) is located at the lower end of the pressure relief cam (8), the switch handle (3) is rotated to enable the pressure relief cam (8) to press the lock rod (9), and the penetrating end of the lock rod (9) can penetrate into the insertion hole of the quick-opening blind plate (6). And an elastic piece (11) is arranged at the penetrating end of the lock rod (9). Misoperation is avoided through interlocking of the pressure relief cam (8) and the lock rod (9), and pressure relief safety is guaranteed. The problems that an existing quick-opening blind plate lacks a safety interlocking pressure relief device, misoperation is prone to occurring, and safety accidents are caused are solved.

Description

Technical Field

[0001] The utility model relates to a safety pressure relief interlocking mechanism of a quick-opening blind plate, belonging to the field of quick pressure relief equipment. Background Art

[0002] After a period of use, impurities will accumulate in the pressure vessels or pressure pipelines of petroleum, natural gas, and chemicals, which will have a serious impact on the storage and transportation of the medium. For this reason, it is required that these equipment must be cleaned by ball cleaning after a period of use to ensure the cleanliness of the inside of the container and pipeline. During the cleaning operation, it is necessary to open the quick-opening blind plate device on the container or pipeline, install the pig, and clean the container and pipeline.

[0003] At present, the operation process of the quick-opening blind plate used in most pressure vessels or pressure pipelines at home and abroad is to first observe the internal pressure of the pipeline, manually open the pressure relief valve to release the pressure, and then start the quick-opening blind plate to perform the ball cleaning operation. In this process, the various operation steps are carried out separately without any order. Even after opening the pressure relief valve, the subsequent operation may not be carried out completely before the pressure of the container and pipeline is released; in more serious cases, the operator is prone to skip the pressure release step and directly operate the quick-opening blind plate, which will cause pressure operation. The pressure leakage inside the container or pipeline will cause serious harm to people and endanger the life safety of the operator in serious cases, and will also pollute the environment. In summary, most of the quick-opening blind plates used in the pressure vessel or pressure pipeline industry now lack safety interlock pressure relief devices, and operators or other personnel are prone to misoperation, resulting in major safety accidents. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing quick-opening blind plate lacks a safety interlocking pressure relief device, and operators or other personnel are prone to misoperation, resulting in major safety accidents.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a safety pressure relief interlocking mechanism of a quick-opening blind plate, comprising a pressure relief pipe, a pressure relief valve and a locking rod, one end of the pressure relief pipe penetrates into the quick-opening door flange and extends into the pipe, the pressure relief valve is arranged on the pressure relief pipe, and a pressure relief cam is arranged at the rotating end of the switch handle of the pressure relief valve; insertion holes are radially arranged on the outer edge side of the quick-opening blind plate and the blind plate end cover, the locking rod and the pressure relief pipe are spaced apart, and the locking rod is located at the lower end of the pressure relief cam, the switch handle is rotated so that the pressure relief cam presses the locking rod, and the insertion end of the locking rod can pass through the blind plate end cover and penetrate into the insertion hole of the quick-opening blind plate; the insertion end of the locking rod is provided with an elastic member.

[0006] Among them, the lower part of the locking rod in the above structure is provided with a flange structure, the insertion hole on the blind plate end cover is a countersunk structure, one end of the elastic member is placed on the countersunk step surface, and the other end is in contact and connected with the flange large end step surface at the lower part of the locking rod.

[0007] Furthermore, the above structure also includes a locking rod sleeve, which is sleeved on the outside of the locking rod, and the lower end of the locking rod sleeve can be detachably connected to the blind plate end cover.

[0008] Furthermore, in the above structure, the internal through hole of the locking rod sleeve is an inverted countersunk structure, and the large end step surface is in contact and connected with the large end step surface of the flange of the locking rod.

[0009] Wherein, a handle seat is arranged on the outer side of the quick-opening blind plate in the above structure, and a handle tube is detachably connected to the handle seat.

[0010] Wherein, the handle seat in the above structure is detachably connected to the quick-open blind plate, and a through hole is provided on the handle seat so that the handle tube can be plugged into the handle seat.

[0011] Wherein, the elastic member in the above structure is a tube spring structure.

[0012] Furthermore, the above structure also includes a pressure gauge and a needle valve, which are connected in series and connected to the pipeline inside the quick-opening door flange.

[0013] Wherein, the insertion end of the locking rod in the above structure is a semicircular head structure.

[0014] Wherein, the pressure relief cam in the above structure is an arc-shaped block structure with different curvature radii.

[0015] The beneficial effect of the utility model is as follows: the structure actually installs a pressure relief cam on the switch handle of the pressure relief valve, and the pressure relief cam supports or releases the locking rod through the high and low points, so that the locking rod moves in the locking rod sleeve, and locks or disengages from the socket of the quick-opening blind plate, forming a safety pressure relief interlocking mechanism. When the pressure relief valve is not opened or is not fully opened, the locking rod cannot move, so that the locking rod is always embedded in the socket of the quick-opening blind plate, and the quick-opening blind plate is locked and cannot be rotated to open, thereby preventing the possibility of operator misoperation and ensuring overall safety. When the manual pressure relief valve is opened, after the pressure inside the pressure vessel or pressure pipeline is released, the locking rod moves outward under the spring force of the elastic member, disengages from the socket of the quick-opening blind plate, and releases the locking function. At this time, the quick-opening blind plate can be opened to perform the cleaning operation of the pressure vessel or pressure pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model.

[0017] Figure 2 For this utility model Figure 1A magnified schematic diagram of the structure at point I in the middle.

[0018] Figure 3 It is a schematic diagram of the full cross-section structure of the utility model.

[0019] Marked in the figure: 1 is the quick-opening door flange, 2 is the handle tube, 3 is the switch handle, 4 is the blind plate end cover, 5 is the handle seat, 6 is the quick-opening blind plate, 7 is the pressure relief valve, 8 is the pressure relief cam, 9 is the locking rod, 10 is the locking rod sleeve, 11 is the elastic part, 12 is the needle valve, 13 is the pressure gauge, and 14 is the pressure relief pipe. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 3 As shown, the safety pressure relief interlocking mechanism of the quick-opening blind plate of the utility model comprises a pressure relief pipe 14, a pressure relief valve 7 and a locking rod 9. One end of the pressure relief pipe 14 penetrates into the quick-opening door flange 1 and extends into the pipe. The pressure relief valve 7 is arranged on the pressure relief pipe 14. A pressure relief cam 8 is arranged at the rotating end of the switch handle 3 of the pressure relief valve 7. Insertion holes are radially arranged on the outer edge side of the quick-opening blind plate 6 and the blind plate end cover 4. The locking rod 9 is spaced apart from the pressure relief pipe 14, and the locking rod 9 is located at the lower end of the pressure relief cam 8. The switch handle 3 is rotated so that the pressure relief cam 8 presses the locking rod 9. The insertion end of the locking rod 9 can pass through the blind plate end cover 4 and penetrate into the insertion hole of the quick-opening blind plate 6. The insertion end of the locking rod 9 is provided with an elastic member 11. Those skilled in the art can understand that, in this structure, a mounting hole is actually provided on the outer circumference of the quick-opening door flange 1, and the pressure relief pipe 14 is passed through the mounting hole and fixed by welding, and the pressure relief valve 7 is arranged on the pressure relief pipe 14. In practice, the pressure relief valve 7 is preferably a manual valve, and the valve body is opened and closed by the switch handle 3. At the same time, the pressure relief cam 8 is installed on the rotating end of the switch handle 3 of the pressure relief valve 7, and it is noted that the installation direction of the pressure relief cam 8 meets the requirements, so that the pressure relief cam 8 can rotate with the switch handle 3. The locking rod 9 is spaced apart from the pressure relief pipe 14, and the locking rod 9 is located at the lower end of the pressure relief cam 8. When the switch handle 3 is actually rotated so that the pressure relief cam 8 contacts and presses the locking rod 9, and the locking rod 9 moves downward, it can pass through the blind plate end cover 4 and penetrate into the insertion hole of the quick-opening blind plate 6, and the quick-opening blind plate 6 can be locked so that it cannot rotate; and when the switch handle 3 is rotated to switch the pressure relief valve 7, the locking rod 9 can be loosened or pressed down by the pressure relief cam 8, and the locking rod 9 will move up and down, so that it can be disengaged or embedded in the insertion hole of the quick-opening blind plate 6, forming a safety pressure relief interlocking mechanism. In practice, the blind plate end cover 4 is preferably installed on the quick-opening door flange 1 by means of hexagon socket screws, and the quick-opening blind plate 6 and the blind plate end cover 4 are preferably designed as tooth-embedded type, which is convenient for quick operation of the quick-opening blind plate 6, and at the same time ensures that after the quick-opening blind plate 6 is installed on the blind plate end cover 4, the insertion holes on the quick-opening blind plate 6 and the blind plate end cover 4 are coaxially arranged and located directly below the locking rod 9.

[0022] Preferably, in the above structure, the lower part of the locking rod 9 is provided with a flange structure, the insertion hole on the blind plate end cover 4 is a countersunk hole structure, one end of the elastic member 11 is placed on the countersunk hole step surface, and the other end is in contact with and connected to the flange large end step surface at the lower part of the locking rod 9. It can be understood by those skilled in the art that, in order to facilitate the limiting of the elastic member 11, the present structure preferably provides a flange structure at the lower part of the locking rod 9, that is, the lower part of the locking rod 9 is provided with a similar fixing ring, so that the entire structure is large in the middle and small at both ends, and the insertion hole on the blind plate end cover 4 is preferably a countersunk hole structure, and at the same time, one end of the elastic member 11 is placed on the countersunk hole step surface, and the other end is in contact with and connected to the flange large end step surface at the lower part of the locking rod 9, so that the locking rod 9 can be moved downward to compress the elastic member 11, and the locking rod 9 can be moved upward and reset by the elastic force of the elastic member 11 after the pressure relief cam 8 does not act on the upper end of the locking rod 9.

[0023] Preferably, the above structure further includes a locking rod sleeve 10, which is sleeved on the outside of the locking rod 9, and the lower end of the locking rod sleeve 10 can be detachably connected to the blind plate end cover 4. It can be understood by those skilled in the art that, in order to ensure the firmness of the structure, it is preferred to sleeve the locking rod sleeve 10 on the outside of the locking rod 9, and the lower end of the locking rod sleeve 10 can be detachably connected to the blind plate end cover 4. In fact, a mounting threaded hole for the locking rod sleeve 10 is processed on the blind plate end cover 4, and the locking rod sleeve 10 can be installed on the blind plate end cover 4 through threads.

[0024] Preferably, the internal through hole of the lock rod sleeve 10 in the above structure is an inverted countersunk structure, and the large end step surface is in contact with the large end step surface of the flange of the lock rod 9. It can be understood by those skilled in the art that in order to limit the upward movement distance of the lock rod 9 and ensure the stability of the interlocking mechanism, it is actually preferred that the internal through hole of the lock rod sleeve 10 is an inverted countersunk structure, that is, the upper hole diameter is small and the lower hole diameter is large, which belongs to a reducer structure, and the large end step surface is in contact with the large end step surface of the flange of the lock rod 9, which is used to limit the upward movement distance of the lock rod 9 so that it is always at the lower end of the pressure relief cam 8 to ensure good contact.

[0025] Preferably, in the above structure, a handle seat 5 is arranged outside the quick opening blind plate 6, and a handle tube 2 is detachably connected to the handle seat 5. It can be understood by those skilled in the art that, in order to facilitate the quick opening and closing of the quick opening blind plate 6, the structure is provided with a handle seat 5 and a handle tube 2 on the quick opening blind plate 6, and the quick opening blind plate 6 can be quickly operated by rotating the handle tube 2.

[0026] Preferably, the handle base 5 and the quick-open blind plate 6 in the above structure are detachably connected, and a through hole is provided on the handle base 5, so that the handle tube 2 can be plugged into the handle base 5. It can be understood by those skilled in the art that, in order to facilitate installation and manufacturing, it is actually preferred that the handle base 5 and the quick-open blind plate 6 are detachably connected, preferably by screw connection and fixing. And a through hole is provided on the handle base 5, so that the handle tube 2 can be plugged into the handle base 5.

[0027] Preferably, the elastic member 11 in the above structure is a tube spring structure. Those skilled in the art will appreciate that, in order to facilitate installation and reduce manufacturing costs, the elastic member 11 is preferably a tube spring structure, and the elastic member 11 is directly sleeved on the lower part of the locking rod 9.

[0028] Preferably, the above structure also includes a pressure gauge 13 and a needle valve 12, which are connected in series and connected to the pipeline inside the quick-opening door flange 1. It can be understood by those skilled in the art that in order to further check the internal pressure of the pressure vessel or pipeline, it is actually preferred to install the needle valve 12 and the pressure gauge 13 on the pipeline inside the quick-opening door flange 1 to monitor the internal pressure of the pressure vessel or pressure pipeline. When the manual pressure relief valve 7 is opened to release the pressure, it is simultaneously observed and confirmed that the pointer of the pressure gauge 13 returns to zero, and the locking rod 9 is moved and released, and the quick-opening blind plate 6 can be opened and closed by the handle.

[0029] Preferably, the two ends of the locking rod 9 in the above structure are semicircular head structures. Those skilled in the art can understand that the locking rod 9 is preferably designed as a semicircular head structure at the end of the locking rod 9 in this structure, which is convenient for matching with the pressure relief cam 8 and guiding to smoothly penetrate into the insertion hole.

[0030] Preferably, the pressure relief cam 8 in the above structure is an arc-shaped block structure with unequal radii of curvature. It can be understood by those skilled in the art that, since the locking rod 9 is pressed down and inserted into the insertion hole by the pressure relief cam 8 to lock the quick-open blind plate 6, the rotation of the pressure relief cam 8 should make the radius of curvature of the contact point between it and the locking rod 9 gradually change, so it is preferred that the pressure relief cam 8 is an arc-shaped block structure with unequal radii of curvature, so that the entire pressure relief cam 8 is similar to a part of an ellipse. This structural setting allows the switch handle 3 of the pressure relief valve 7 to be closed, and the pressure relief cam 8 rotates with the switch handle 3. At this time, the high point of the pressure relief cam 8 contacts the compression locking rod 9, and the locking rod 9 moves inward and downward, so that it is embedded in the insertion hole of the quick-open blind plate 6, locking the quick-open blind plate 6 so that it cannot rotate, forming a locking function. When the switch handle 3 of the pressure relief valve 7 is opened, the internal pressure of the pressure vessel or the pressure pipeline is released; the pressure relief cam 8 rotates together with the switch handle 3, and at this time, the high point of the pressure relief cam 8 is separated from the locking rod 9, and the locking rod 9 moves outward under the action of the elastic member 11 and is separated from the insertion hole of the quick-opening blind plate 6, so that the quick-opening blind plate 6 can be rotated to open the quick-opening blind plate 6 for cleaning operation.

Claims

1. The safety pressure relief interlocking mechanism of the quick-opening blind plate is characterized by: Including pressure relief A tube (14), a pressure relief valve (7) and a locking rod (9), wherein one end of the pressure relief tube (14) penetrates into the quick-opening door flange (1) and extends into the tube, the pressure relief valve (7) is arranged on the pressure relief tube (14), and a pressure relief cam (8) is arranged at the rotating end of the switch handle (3) of the pressure relief valve (7); insertion holes are radially arranged on the outer edge side of the quick-opening blind plate (6) and the blind plate end cover (4); the locking rod (9) and the pressure relief tube (14) are arranged at intervals, and the locking rod (9) is located at the lower end of the pressure relief cam (8); the switch handle (3) is rotated so that the pressure relief cam (8) presses the locking rod (9), and the insertion end of the locking rod (9) can pass through the blind plate end cover (4) and penetrate into the insertion hole of the quick-opening blind plate (6); and the insertion end of the locking rod (9) is provided with an elastic member (11).

2. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 1 is characterized in that: The locking rod (9) is provided with a flange structure at the bottom, the insertion hole on the blind plate end cover (4) is a countersunk hole structure, one end of the elastic member (11) is placed on the countersunk hole step surface, and the other end is in contact with and connected to the flange large end step surface at the bottom of the locking rod (9).

3. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 2 is characterized in that: It also comprises a locking rod sleeve (10), which is sleeved on the outside of the locking rod (9), and the lower end of the locking rod sleeve (10) can be detachably connected to the blind plate end cover (4).

4. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 3 is characterized in that: The internal through hole of the locking rod sleeve (10) is an inverted countersunk hole structure, and the large end step surface is in contact and connected with the large end step surface of the flange of the locking rod (9).

5. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 1 is characterized in that: A handle seat (5) is arranged outside the quick-open blind plate (6), and a handle tube (2) is detachably connected to the handle seat (5).

6. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 5 is characterized in that: The handle seat (5) is detachably connected to the quick-open blind plate (6), and a through hole is provided on the handle seat (5), so that the handle tube (2) can be plugged into the handle seat (5).

7. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 1 is characterized in that: The elastic member (11) is a tube spring structure.

8. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 6 is characterized in that: It also comprises a pressure gauge (13) and a needle valve (12), wherein the pressure gauge (13) and the needle valve (12) are connected in series and are communicated with the pipeline inside the quick-opening door flange (1).

9. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 1, characterized in that: The insertion end of the locking rod (9) is a semicircular head structure.

10. The safety pressure relief interlocking mechanism of the quick-opening blind plate according to claim 1, characterized in that: The pressure relief cam (8) is an arc-shaped block structure with different curvature radii.

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