A card sleeve type plug valve

Abstract

The utility model relates to a sleeve-type plug valve, comprising a valve body, a plug is rotatably connected inside the valve body, a cover plate is fixed on the top of the plug, a sealing mechanism is provided inside the valve body, a fixing mechanism is provided on the valve body, and a valve stem is rotatably connected to the top side of the cover plate; the sealing mechanism comprises a movable groove provided on the bottom side of the inner wall of the valve body, two movable rods are slidably connected inside the movable groove, and a first spring is sleeved on the outer surface of the movable rod. The sleeve-type plug valve, by providing a sealing mechanism inside the valve body, can convert the hard seal between the valve body and the plug into a soft seal through a sealing gasket, while ensuring the sealing effect, reducing the difficulty of processing the valve body and the plug, reducing the production cost, and by providing a fixing mechanism on the valve body, there is no need to fix the cover plate on the valve body with parts such as screws, thereby no need to use tools such as screwdrivers to disassemble the parts, thereby improving the maintenance efficiency of the staff.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a sleeve type plug valve. Background Art

[0002] A plug valve is a rotary valve in the shape of a closing piece or a plunger. It is a valve that is opened or closed by rotating 90 degrees to connect or separate the channel opening on the valve plug with the channel opening on the valve body. The shape of its valve plug can be cylindrical or conical. In a cylindrical valve plug, the channel is generally rectangular; in a conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve light and most suitable for cutting off and connecting media and for diversion. However, depending on the applicable properties and the erosion resistance of the sealing surface, it can sometimes be used for throttling.

[0003] For example, this patent (CN202122532433.X) discloses a novel fixed sleeve plug valve, comprising a valve body, flanges are fixedly connected on both sides of the valve body, a sleeve is arranged inside the flange, a sliding mechanism is arranged inside the sleeve, one side of the sliding mechanism is interconnected with the valve body, a valve core is arranged at one end of the sleeve, a rotating rod is installed on the top of the valve core, a fixed block is welded on one side of the telescopic mechanism, and the bottom block is interconnected with the telescopic mechanism. In this novel fixed sleeve plug valve, the sleeve inside the plug valve is engaged with the slot provided on the valve body through a top buckle, and the mutual cooperation between the top buckle and the sliding buckle can release the engagement between the sleeve and the valve body, thereby facilitating the disassembly and replacement of the sleeve. At the same time, the engaging mechanism connects the top plate and the bottom plate, and the top plate and the bottom plate can be separated by opening and closing the engaging mechanism, which is beneficial for cleaning the valve core inside the valve body after separation.

[0004] The above scheme also has the following technical deficiencies. In the above scheme, the plug and the valve body are both metal structural parts, that is, the seal between the plug and the valve body is a hard seal, and the hard seal has high requirements for the processing of the sealing surface, which undoubtedly increases the difficulty of processing the sealing surface, thereby resulting in excessively high production costs. Based on this, a sleeve-type plug valve is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sleeve-type plug valve, which has the advantages of convenient sealing between the plug and the valve body, and solves the problem of inconvenient sealing between the plug and the valve body.

[0006] To achieve the above object, the utility model provides the following technical solutions: a sleeve-type plug valve, comprising a valve body, a plug is rotatably connected inside the valve body, a cover plate is fixed on the top of the plug, a sealing mechanism is provided inside the valve body, a fixing mechanism is provided on the valve body, and a valve stem is rotatably connected to the top side of the cover plate;

[0007] The sealing mechanism includes a movable groove opened on the bottom side of the inner wall of the valve body, two movable rods are slidably connected inside the movable groove, a first spring is sleeved on the outer surface of the movable rod, a movable plate is fixed on the top end of the movable rod, and a sealing gasket is fixed on the top end of the movable plate.

[0008] Furthermore, the fixing mechanism includes two mounting grooves on the left and right sides of the valve body, a second spring is fixed inside the mounting groove, an extrusion plate is slidably connected inside the mounting groove, a push rod is fixed to the end of the extrusion plate away from the second spring, a push plate is fixed to the end away from the push rod, a limiting rod is fixed to the top of the extrusion plate, and the fixing mechanism also includes two connecting grooves opened inside the valve body and two connecting plates fixed to the bottom end of the cover plate, and the connecting plates are placed in the connecting grooves.

[0009] Furthermore, two slide grooves are provided inside the valve body, the top side of the slide groove is connected with the bottom side of the moving groove, and the moving rod slides in the moving groove.

[0010] Furthermore, a placement groove is provided at the top of the sealing gasket, the outer surface of the plug is in contact with the inner side wall of the placement groove, and the cross-section of the sealing gasket is trapezoidal.

[0011] Furthermore, the push rod slides in the installation groove, and the installation groove is connected to the connecting groove.

[0012] Furthermore, a limiting hole is provided inside the connecting plate, and the limiting rod abuts against the limiting hole.

[0013] Furthermore, a bearing seat is fixed to the top side of the cover plate, and the valve stem rotates in the bearing seat.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The ferrule-type plug valve, by providing a sealing mechanism inside the valve body, can convert the hard seal between the valve body and the plug into a soft seal through a sealing gasket, thereby reducing the difficulty of processing the valve body and the plug while ensuring the sealing effect, thereby reducing the production cost. By providing a fixing mechanism on the valve body, there is no need to fix the cover plate to the valve body with parts such as screws, and there is no need to use tools such as screwdrivers to disassemble the parts, thereby improving the maintenance efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 3It is a three-dimensional schematic diagram of the partial structure of the structural sealing mechanism of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the installation mechanism and valve body of the utility model.

[0020] In the figure: 1 valve body, 2 plug, 3 cover plate, 400 sealing mechanism, 401 moving groove, 402 moving rod, 403 first spring, 404 moving plate, 405 sealing gasket, 500 fixing mechanism, 501 mounting groove, 502 second spring, 503 extrusion plate, 504 push rod, 505 push plate, 506 limiting rod, 507 connecting groove, 508 connecting plate, 6 valve stem. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 A sleeve-type plug valve in this embodiment includes a valve body 1, a plug 2 is rotatably connected inside the valve body 1, a cover plate 3 is fixed to the top of the plug 2, a sealing mechanism 400 is provided inside the valve body 1, a fixing mechanism 500 is provided on the valve body 1, and a valve stem 6 is rotatably connected to the top side of the cover plate 3.

[0023] The plug 2 in this embodiment is used to control the passage of water, the cover plate 3 is used to seal the valve body 1 in and out, the sealing mechanism 400 is used to seal the gap between the plug 2 and the valve body 1, the fixing mechanism 500 is used to fix the cover plate 3 on the valve body 1, and the valve stem 6 is used to drive the plug 2 to rotate.

[0024] See also Figure 1-3 In order to facilitate the sealing between the valve body 1 and the plug 2, the sealing mechanism 400 in this embodiment includes a movable groove 401 opened on the bottom side of the inner wall of the valve body 1, and two movable rods 402 are slidably connected inside the movable groove 401. Two sliding grooves are opened inside the valve body 1, and the top side of the sliding groove is connected to the bottom side of the movable groove 401. The movable rod 402 slides in the movable groove 401, and the outer surface of the movable rod 402 is sleeved with a first spring 403. A movable plate 404 is fixed to the top of the movable rod 402, and a sealing gasket 405 is fixed to the top of the movable plate 404. A placement groove is opened on the top of the sealing gasket 405, and the outer surface of the plug 2 abuts against the inner side wall of the placement groove. The cross-section of the sealing gasket 405 is trapezoidal.

[0025] The sealing mechanism 400 in this embodiment realizes a soft seal between the valve body 1 and the plug 2 by placing the sealing gasket 405 between the valve body 1 and the plug 2. The first spring 403 is used to drive the movable plate 404 and the sealing gasket 405 to move upward to fit with the plug 2. The movable rod 402 limits the movable plate 404 by sliding in the slide groove.

[0026] It should be noted that the first spring 403 is in a compressed state when it is just installed in the valve body 1, and the sealing gasket 405 is in abutment with the left and right side walls of the movable groove 401. When a part of the sealing gasket 405 is worn away between the surrounding area of ​​the sealing gasket 405 and the sliding groove, the sealing gasket 405 can move up a little under the action of the deformation recovery of the first spring 403, so as to achieve the seal between the sealing gasket 405 and the sliding groove. At the same time, when the plug 2 is just installed in the placement groove of the sealing gasket 405, there is a certain distance between the bottom of the plug 2 and the placement groove, and this distance is used for the sealing gasket 405 to move upward.

[0027] See also Figure 1 and Figure 4 In order to facilitate the removal of the plug 2 for maintenance, the fixing mechanism 500 in this embodiment includes two mounting grooves 501 opened on the left and right sides of the valve body 1, and the second spring 502 is fixed inside the mounting groove 501. The extrusion plate 503 is slidably connected inside the mounting groove 501. A push rod 504 is fixed to the end of the extrusion plate 503 away from the second spring 502. The push rod 504 slides in the mounting groove 501, and a push plate 505 is fixed to the end away from the push rod 504. A limiting rod 506 is fixed to the top of the extrusion plate 503. The fixing mechanism 500 also includes two connecting grooves 507 opened in the valve body 1 and two connecting plates 508 fixed at the bottom end of the cover plate 3. The mounting groove 501 is connected to the connecting groove 507, and the connecting plate 508 is placed in the connecting groove 507. A limiting hole is opened inside the connecting plate 508, and the limiting rod 506 abuts against the limiting hole.

[0028] The fixing mechanism 500 in this embodiment is placed in the connecting groove 507 through the connecting plate 508 to facilitate the installation of the cover plate 3. The limiting rod 506 is used to abut against the limiting hole to fix the connecting plate 508. The push rod 504 is used to drive the extrusion plate 503 to extrude the second spring 502. At the same time, the extrusion plate 503 can drive the limiting rod 506 to leave the limiting groove.

[0029] It should be noted that the second spring 502 is used for deformation recovery to drive the limiting rod 506 back to the limiting hole, and the push plate 505 is used for driving the push rod 504 to move.

[0030] The working principle of the above embodiment is:

[0031] When the plug 2 needs to be installed, the push plate 505 is pushed toward the center of the valve body 1, and the push plate 505 drives the push rod 504 to move, and the push rod 504 drives the extrusion plate 503 to squeeze the second spring 502. At the same time, the extrusion plate 503 drives the limiting rod 506 to leave the limiting hole, align the connecting plate 508 with the connecting groove 507, and put the plug 2 into the valve body 1. The surrounding of the plug 2 is fitted with the placement groove of the sealing gasket 405, and the push plate 505 is released. The limiting rod 506 enters the connecting hole under the action of the second spring 502 recovering from deformation. In the limiting hole of plate 508; after being used for a period of time, friction occurs between the sealing gasket 405 and the movable groove 401, causing the sealing gasket 405 to wear. At this time, the first spring 403 recovers its shape, and the movable rod 402 and the sealing gasket 405 move upward under the action of the deformation recovery of the first spring 403. The sealing gasket 405 is squeezed against the movable groove 401 again, thereby achieving re-sealing. When the plug 2 needs to be inspected, the push plate 505 is pushed to move, and the push plate 505 makes the limiting rod 506 leave the limiting hole, and the plug 2 is taken out for inspection.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A sleeve-type plug valve, comprising a valve body (1), characterized in that: The valve body (1) is rotatably connected to a plug (2), a cover plate (3) is fixed to the top of the plug (2), a sealing mechanism (400) is provided inside the valve body (1), a fixing mechanism (500) is provided on the valve body (1), and a valve stem (6) is rotatably connected to the top side of the cover plate (3); The sealing mechanism (400) comprises a movable groove (401) provided on the bottom side of the inner wall of the valve body (1), two movable rods (402) are slidably connected inside the movable groove (401), a first spring (403) is sleeved on the outer surface of the movable rod (402), a movable plate (404) is fixed to the top end of the movable rod (402), and a sealing gasket (405) is fixed to the top end of the movable plate (404).

2. A sleeve-type plug valve according to claim 1, characterized in that: The fixing mechanism (500) comprises two installation grooves (501) provided on the left and right sides of the valve body (1), a second spring (502) being fixed inside the installation groove (501), an extrusion plate (503) being slidably connected inside the installation groove (501), a push rod (504) being fixed to one end of the extrusion plate (503) away from the second spring (502), a push plate (505) being fixed to the other end away from the push rod (504), a limiting rod (506) being fixed to the top end of the extrusion plate (503), the fixing mechanism (500) further comprises two connection grooves (507) provided inside the valve body (1) and two connection plates (508) fixed to the bottom end of the cover plate (3), the connection plates (508) being placed in the connection grooves (507).

3. A sleeve-type plug valve according to claim 1, characterized in that: Two slide grooves are provided inside the valve body (1), the top side of the slide groove is connected to the bottom side of the moving groove (401), and the moving rod (402) slides in the moving groove (401).

4. A sleeve-type plug valve according to claim 1, characterized in that: The top of the sealing gasket (405) is provided with a placement groove, the outer surface of the plug (2) abuts against the inner side wall of the placement groove, and the cross section of the sealing gasket (405) is trapezoidal.

5. A sleeve-type plug valve according to claim 2, characterized in that: The push rod (504) slides in the installation groove (501), and the installation groove (501) is connected to the connecting groove (507).

6. A sleeve-type plug valve according to claim 2, characterized in that: A limiting hole is provided inside the connecting plate (508), and the limiting rod (506) abuts against the limiting hole.

7. The sleeve-type plug valve according to claim 1, characterized in that: A bearing seat is fixed on the top side of the cover plate (3), and the valve stem (6) rotates in the bearing seat.

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