A boiler superheated steam blocking plate valve core replacement device and a use method thereof

Abstract

The present application relates to the technical field of plug valve, especially to a boiler superheated steam plug valve core replacement device and a use method. The device comprises a plug and an extension support, the plug is connected with the first end of the extension support, the second end of the extension support is used for abutting on the side wall inside the plug valve, so that the plug can be sealed at the valve port position of the plug valve. The present application can replace the original valve core of the plug valve, can be sealed tightly during the water pressure test, is convenient to install, disassemble and maintain, and can be used efficiently for a long time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of block valve, in particular to a boiler superheated steam block valve core replacement device and a use method. BACKGROUND

[0002] At present, the old-fashioned coal-fired boiler superheated steam block valve is in the form of a gate valve, and the stroke of the gate plate is in the form of a sector. When the water pressure test of the superheater is carried out, the valve clapper of the block valve is perpendicular to the fluid flow direction, and plays a sealing role. After the water pressure test is completed, the position of the block valve clapper is shaken to be consistent with the fluid flow direction by an executing device, so as to play a flow guiding role. However, the current block valve, especially the block valve with a long service life or even an overdue block valve, has the following shortcomings: first, the internal sealing surface of the block valve is damaged, the sealing is not tight, and the sealing is not tight and water leakage phenomenon occurs, which is not conducive to the maintenance of the water pressure test pressure; second, the valve clapper and the internal executing mechanism of the valve body are subjected to the scouring of high-temperature and high-pressure superheated steam for many years, and are prone to aging, deformation and even damage; third, the external executing device is only operated during the water pressure test, and the opportunity for the water pressure test is not much, so the number of operations is very small, which leads to the fact that the internal executing mechanism is easy to accumulate dust and scale, and the valve opening and closing is blocked, or even the valve opening and closing is not in place, which affects the water pressure test and the normal steam passage. SUMMARY

[0003] The purpose of the present application is to provide a boiler superheated steam block valve core replacement device and a use method, which can replace the valve core of the original block valve, can be sealed tightly during the water pressure test, is convenient to install, disassemble and maintain, and can be used efficiently for a long time.

[0004] In the first aspect of the present application, a boiler superheated steam block valve core replacement device is provided, which comprises a block plate and a telescopic support; the block plate is connected with the first end of the telescopic support; the second end of the telescopic support is used for abutting against the side wall inside the block valve, so that the block plate can be blocked at the valve port position of the block valve.

[0005] Preferably, the telescopic support comprises a universal joint and a telescopic connecting rod; the first end of the telescopic connecting rod is connected with the block plate through the universal joint; the second end of the telescopic connecting rod has a connecting rod fulcrum.

[0006] Preferably, the telescopic connecting rod comprises a first rod body, a second rod body, a first adjusting nut and a second adjusting nut; the first adjusting nut is installed on the first rod body; the second adjusting nut is installed on the second rod body; the first end of the first rod body is connected with the universal joint, the second end of the first rod body is threadedly connected with the first end of the second rod body, and the second end of the second rod body has a connecting rod fulcrum.

[0007] Preferably, the shape of the connecting rod fulcrum is conical.

[0008] Preferably, a supporting surface matched with the connecting rod fulcrum is arranged on the side wall inside the plug valve.

[0009] Preferably, the plug comprises a valve flap and a sealing ring; one side of the valve flap is blocked at the valve port position inside the plug valve; the other side of the valve flap is connected with the telescopic connecting rod through the universal joint; and the sealing ring is arranged between the valve flap and the valve port.

[0010] Preferably, a sealing surface is arranged at the valve port position; one side of the valve flap is provided with a circular boss, the sealing ring is sleeved on the edge of the circular boss, and the circular boss is blocked at the inner ring of the sealing surface.

[0011] Preferably, a clamping groove is arranged on the other side of the valve flap, and the universal joint is arranged in the clamping groove.

[0012] In the second aspect of the present application, a use method of the above-mentioned plug valve core replacement device for a boiler superheated steam is provided, which comprises the following steps:

[0013] S1, disassembling the valve cover of the plug valve;

[0014] S2, installing the plug and the telescopic support inside the plug valve;

[0015] S3, attaching the plug to the valve port position inside the plug valve;

[0016] S4, adjusting the length of the telescopic support to support the telescopic support on the side wall inside the plug valve, so as to realize the plugging of the plug to the valve port.

[0017] S5, adjusting the length of the telescopic support to separate the plug from the valve port, and taking out the telescopic support and the plug;

[0018] S6, reassembling the valve cover of the plug valve.

[0019] Beneficial effects:

[0020] The technical scheme of the present application can replace the original plug valve core, and by being placed inside the plug valve during water pressure test, the valve port sealing is realized through the cooperation of the plug and the telescopic support, and after the water pressure test is completed, the plug valve core can be taken out, which is convenient for installation, disassembly and maintenance, and can be used efficiently for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is the structural schematic view of the boiler superheated steam blocking plate valve core replacement device of the present application;

[0023] Figure 2 It is the structural schematic view of the first rod body of the present application;

[0024] Figure 3 It is the structural schematic view of the second rod body of the present application;

[0025] Figure 4 It is the top view of the valve clack of the present application;

[0026] Figure 5 It is the side view of the valve clack of the present application;

[0027] Explanation of reference signs:

[0028] 1, blocking plate valve; 2, connecting rod fulcrum; 3, second adjusting nut; 4, sealing ring; 5, first adjusting nut; 6, universal joint; 7, valve clack; 8, sealing surface; 9, telescopic connecting rod. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply a relative importance or an ordering between the indicated technical features. Thus, features defined with "first", "second" or "third" can include one or more of the features implicitly or explicitly. In the description of the application, the meaning of "a plurality of" is two or more, unless explicitly specified otherwise. In addition, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figures 1-5 The present embodiment provides a boiler superheated steam blocking plate valve core replacement device, comprising: a blocking plate and a telescopic support; the blocking plate is connected with the first end of the telescopic support; the second end of the telescopic support is used to abut on the side wall inside the blocking plate valve 1, so that the blocking plate can be blocked at the valve port position of the blocking plate valve 1. When the water pressure test is carried out, it is placed inside the blocking plate valve 1, and the valve port sealing is realized through the cooperation of the blocking plate and the telescopic support. After the water pressure test is completed, it can be taken out, which is convenient for installation, disassembly and maintenance, and can be used efficiently for a long time.

[0033] In the present embodiment, the telescopic support comprises: a universal joint 6 and a telescopic connecting rod 9; the first end of the telescopic connecting rod 9 is connected with the blocking plate through the universal joint 6; the second end of the telescopic connecting rod 9 has a connecting rod fulcrum 2. The form of universal joint connection can make the telescopic connecting rod 9 have more adjustment angles.

[0034] In the present embodiment, the telescopic connecting rod 9 comprises: a first rod body, a second rod body, a first adjusting nut 5 and a second adjusting nut 3; the first adjusting nut 5 is installed on the first rod body; the second adjusting nut 3 is installed on the second rod body; the first end of the first rod body is connected with the universal joint 6, the second end of the first rod body is threadedly connected with the first end of the second rod body, and the second end of the second rod body has the connecting rod fulcrum 2. The length of the telescopic connecting rod 9 is adjusted by the first adjusting nut 5 and the second adjusting nut 3, which is simple in structure, convenient and reliable in operation. Of course, the number of rod bodies and adjusting nuts in the telescopic connecting rod 9 can be designed as one or more according to actual needs, so as to adapt to blocking plate valves 1 of different shapes and sizes.

[0035] Preferably, the shape of the connecting rod fulcrum 2 can be designed according to actual use requirements. In the embodiment, the connecting rod fulcrum 2 is conical, which can better support the side wall inside the flashboard valve 1 and prevent sliding. Preferably, the front end of the connecting rod fulcrum 2 is detachably connected to the support disc, appropriately increasing the contact area of the connecting rod fulcrum 2 and the flashboard valve 1 for better support. Specifically, the side wall inside the flashboard valve 1 is provided with a support surface matched with the connecting rod fulcrum 2. The support surface is located above the opposite side of the valve port to be blocked. The support surface can be a concave surface or other positions that can form a fulcrum.

[0036] Optionally, the second end of the second rod body is detachably connected to the connecting rod fulcrum 2. When the shape or material of the side wall inside the flashboard valve 1 is different, different connecting rod fulcrums 2 can be replaced to adapt.

[0037] In the embodiment, the flashboard includes a valve clack 7 and a sealing ring 4. One side of the valve clack 7 is blocked at the valve port position inside the flashboard valve 1. The other side of the valve clack 7 is connected to the telescopic connecting rod 9 through the universal joint 6. The sealing ring 4 is arranged between the valve clack 7 and the valve port.

[0038] Preferably, the sealing ring 4 is an O-ring made of fluororubber, which is resistant to high temperature and corrosion. Preferably, the valve clack 7 and the telescopic support are made of stainless steel, which is resistant to corrosion and rusting.

[0039] In the embodiment, the valve port position is provided with a sealing surface 8. Further, the sealing surface 8 is a circular ring, and the cross section of the valve clack 7 is circular. Specifically, the valve clack 7 has a circular boss, and the sealing ring is sleeved on the circumference of the circular boss. The circular boss of the valve clack 7 is blocked in the inner ring of the sealing surface 8, and sealing is realized by the sealing ring 4. Of course, the shape of the valve clack 7 can not only be circular, but also can be designed as any regular or irregular shape according to the actual situation of the valve port, such as an oval, a square, a polygon, etc.

[0040] Preferably, the other side of the valve clack 7 is provided with a clamping groove, and the universal joint 6 is arranged in the clamping groove. The connecting mode of the universal joint 6 can adjust the direction of the telescopic connecting rod 9 according to the size and shape inside the flashboard valve 1, so as to better realize support.

[0041] The embodiment also provides a use method of the above-mentioned flashboard valve core replacement device for a boiler superheated steam, which includes the following steps:

[0042] S1, disassembling the valve cover of the flashboard valve 1;

[0043] S2, installing the flashboard and the telescopic support in the inside of the flashboard valve 1;

[0044] Specifically, the length of the telescopic connecting rod 9 is shortened by the first adjusting nut 5 and the second adjusting nut 3, so that the blocking plate and the telescopic support can be installed inside the blocking plate valve 1. The telescopic support comprises a universal joint 6 and a telescopic connecting rod 9; the telescopic connecting rod 9 comprises a first rod body, a second rod body, a first adjusting nut 5 and a second adjusting nut 3; the first adjusting nut 5 is installed on the first rod body; the second adjusting nut 3 is installed on the second rod body; the first end of the first rod body is connected with the universal joint 6, the second end of the first rod body is threadedly connected with the first end of the second rod body, and the second end of the second rod body has a connecting rod fulcrum 2.

[0045] S3, the blocking plate is attached to the valve port position inside the blocking plate valve 1.

[0046] Specifically, one side of the valve disc 7 is blocked at the valve port position inside the blocking plate valve 1; the other side of the valve disc 7 is connected with the telescopic connecting rod 9 through the universal joint 6.

[0047] S4, the length of the telescopic support is adjusted to support the telescopic support on the side wall inside the blocking plate valve 1, so as to realize the blocking of the valve port by the blocking plate.

[0048] Specifically, the length of the telescopic connecting rod 9 is lengthened by the first adjusting nut 5 and the second adjusting nut 3, so that the connecting rod fulcrum 2 of the telescopic connecting rod 9 abuts against the side wall inside the blocking plate valve 1, and at the same time, the valve disc 7 is blocked at the valve port position of the blocking plate valve 1, and the sealing is realized by the sealing ring 4.

[0049] S5, the length of the telescopic support is adjusted to separate the blocking plate from the valve port, and the telescopic support and the blocking plate are taken out.

[0050] Specifically, the length of the telescopic connecting rod 9 is shortened by the first adjusting nut 5 and the second adjusting nut 3, so that the valve disc 7 is separated from the valve port, and the telescopic support and the blocking plate are taken out.

[0051] S6, the valve cover of the blocking plate valve 1 is reinstalled.

[0052] In summary, the technical scheme of the present application can replace the original blocking plate valve core, and by placing it inside the blocking plate valve during the water pressure test, the valve port sealing is realized through the cooperation of the blocking plate and the telescopic support. After the water pressure test is completed, it can be taken out, which is convenient for installation, disassembly and maintenance, and can be used efficiently for a long time.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A replacement device for a boiler superheated steam plug valve core, characterized in that, include: Blocking plate and telescopic support; The blocking plate is connected to the first end of the telescopic bracket; The second end of the telescopic bracket is used to abut against the side wall inside the plug valve so that the plug can seal the valve port of the plug valve. The telescopic support includes: a universal joint and a telescopic linkage; The first end of the telescopic link is connected to the blocking plate via the universal joint; The second end of the telescopic link has a link fulcrum; The telescopic link includes: a first rod body, a second rod body, a first adjusting nut, and a second adjusting nut; the first adjusting nut is installed on the first rod body; the second adjusting nut is installed on the second rod body; the first end of the first rod body is connected to a universal joint, the second end of the first rod body is threadedly connected to the first end of the second rod body, and the second end of the second rod body has a connecting rod fulcrum; The blocking plate includes: a valve disc and a sealing ring; One side of the valve disc is blocked at the valve port position inside the plug valve. The other side of the valve disc is connected to the telescopic link via the universal joint; The sealing ring is disposed between the valve disc and the valve port.

2. The boiler superheated steam plug valve core replacement device according to claim 1, characterized in that, The connecting rod fulcrum is conical in shape.

3. The boiler superheated steam plug valve core replacement device according to claim 2, characterized in that, The inner side wall of the plug valve is provided with a support surface that cooperates with the connecting rod fulcrum.

4. The boiler superheated steam plug valve core replacement device according to claim 1, characterized in that, A sealing surface is provided at the valve port; a circular boss is provided on one side of the valve disc, and the sealing ring is fitted onto the edge of the circular boss, with the circular boss sealing the inner ring of the sealing surface.

5. The boiler superheated steam plug valve core replacement device according to claim 4, characterized in that, A slot is provided on the other side of the valve disc, and the universal joint is disposed in the slot.

6. The method of using the boiler superheated steam plug valve core replacement device according to any one of claims 1-5, characterized in that, Includes the following steps: S1. Remove the valve cover of the plug valve; S2. Install the plug and telescopic bracket inside the plug valve; S3. Place the plug plate onto the valve port inside the plug plate valve; S4. Adjust the length of the telescopic bracket to support the telescopic bracket on the side wall inside the plug valve, thereby achieving the sealing of the valve port by the plug plate.

7. The method of using the boiler superheated steam plug valve core replacement device according to claim 6, characterized in that, Includes the following steps: S5. Adjust the length of the telescopic bracket to separate the plug plate from the valve port, and remove the telescopic bracket and the plug plate. S6. Reinstall the valve cover of the plug valve.

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