Internal pressure self-sealing plug valve

Abstract

The utility model relates to the technical field of valves, and discloses an internal pressure self-sealing plug valve which comprises a valve body and a plug cock located in the valve body, a valve cavity is formed in the valve body, the plug cock is arranged in the valve cavity of the valve body in a rotating mode, the top of the plug cock is connected with a plug cock end, and the plug cock end is connected with the valve body. A rotary hand wheel is fixedly connected to the interior of the end of the plug cock in a penetrating mode, two small plug cock holes which are oppositely formed are formed in the side wall of the plug cock, two large plug cock holes are oppositely formed in the positions, located on the side edges of the small plug cock holes, of the side wall of the plug cock, and a clamping groove is formed in the rear wall of the upper end of the valve body. And two locking grooves are formed in the upper end of the valve body in the opposite direction of the clamping groove. According to the self-sealing plug valve, the plug valve is sealed through the structure of the self-sealing plug valve in cooperation with the pressure of a liquid medium, self-sealing of the plug valve can be achieved, then the sealing performance and reliability of the plug valve are improved, the service life of the plug valve is prolonged, and the plug valve is convenient to disassemble, replace and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially relates to a plug valve of internal pressure self -sealing. BACKGROUND

[0002] Plug valve is the closing piece or plunger shape rotating valve, through rotating 90 degrees makes the passageway mouth on the valve plug and the passageway mouth on the valve body communicate or separate, realizes the valve of opening or closing. Therefore, plug valve is suitable for cutting off, connecting and shunting the medium circulating in flow channel, sometimes according to the erosion resistance of plug valve sealing surface also is used to throttle the medium circulating in flow channel, and plug valve relies on the position relation between the passageway window of plug and the passageway of valve body to realize the communication or separation of flow channel, therefore, the sealing surface of plug determines the reliability of plug valve to a great extent.

[0003] The plug body of the existing plug valve generally adopts cylindrical or conical shape, and the conical plug body is matched with the conical hole surface of the valve body to form a sealing pair due to its own weight. However, this type of plug valve has the following disadvantages: only the weight of the plug body is relied on to achieve sealing, the safety of the plug valve is low, and as the plug body is continuously used, it will be worn out, which easily leads to a decrease in sealing performance.

[0004] Therefore, the skilled in the art provides a plug valve of internal pressure self-sealing to solve the problems in the background art. SUMMARY

[0005] The utility model discloses a plug valve of internal pressure self-sealing to solve the problems in the background art, which is sealed by the pressure of the liquid medium through its own structure. The plug valve can be self-sealed, thereby improving the sealing performance and reliability of the plug valve and prolonging the service life of the plug valve.

[0006] To achieve the above object, the utility model provides the following technical scheme.

[0007] A plug valve of internal pressure self-sealing, comprising:

[0008] A valve body and a plug located inside the valve body;

[0009] The valve body has a valve cavity inside, the plug is rotatably arranged inside the valve cavity of the valve body, the top of the plug is connected with a plug end head, the plug end head is fixedly connected with a rotating hand wheel inside, the side wall of the plug is provided with two oppositely arranged plug small holes, and the side wall of the plug is provided with two plug large holes opposite to the side edges of the plug small holes.

[0010] The upper end rear wall of the valve body is provided with a clamping groove, two locking grooves are oppositely provided on the upper end of the valve body, a fastening piece is clamped in the clamping groove, and two front ends of the fastening piece respectively extend into the two locking grooves and are connected with the two locking grooves through buckling;

[0011] Through the above technical scheme, the cock small hole and the cock large hole are oppositely arranged on the cock, the medium pressure deforms the cock and tightly abuts against the inner wall of the valve body when the cock small hole and the valve body inlet are communicated by rotating the cock, thereby sealing the liquid and preventing the liquid from flowing to the outlet, so that the valve is closed, the medium flows from the valve body inlet to the outlet and then flows out when the cock large hole and the valve body inlet are communicated by rotating the cock, the pressure in the cock increases and deforms the cock to tightly abut against the valve body, thereby sealing the liquid and preventing the liquid in the cock from leaking out of the valve body, and thus the self-sealing is realized, the sealing performance and reliability of the cock valve are improved, and the service life of the cock valve is prolonged.

[0012] The fastening piece, the clamping groove and the locking groove are arranged, the fastening piece is inserted into the clamping groove, the end of the fastening piece is buckled with the locking groove, and the cock is firmly installed in the valve cavity in the valve body in cooperation with the groove on the cock, and the cock is conveniently disassembled and replaced for maintenance.

[0013] Further, the two side walls of the valve body are connected with a connecting pipe, the connecting pipe is provided with a medium flow channel, and the medium flow channel is connected with the valve cavity in the valve body.

[0014] Through the above technical scheme, the valve cavity in the valve body is connected with the pipeline outside through the medium flow channel in the connecting pipe.

[0015] Further, the outer wall of the locking cap is provided with a plurality of anti-skid strips.

[0016] Through the above technical scheme, the connecting pipe is connected with the pipeline outside through the locking cap, and the anti-skid strips can be more conveniently screwed.

[0017] Further, the fastening piece is in a U shape, and the sizes of the two ends of the fastening piece are slightly larger than the inner diameter of the locking groove.

[0018] Through the above technical scheme, the sizes of the two ends of the fastening piece are slightly larger than the inner diameter of the locking groove, so that the interference fit is achieved, and the locking is more firm.

[0019] Further, the outer wall of the connecting pipe is provided with an outer connecting thread, the inner wall of the locking cap is provided with an inner connecting thread, and the connecting pipe and the locking cap are connected through the outer connecting thread and the inner connecting thread.

[0020] Through the technical scheme, the locking cap is convenient to disassemble and assemble through the threaded connection.

[0021] Further, the outer diameter of the plug is slightly larger than the inner diameter of the valve cavity in the valve body, and a groove is arranged in the middle of the plug, and the fastening member is clamped in the groove.

[0022] Through the technical scheme, the outer diameter of the plug is slightly larger than the inner diameter of the valve cavity in the valve body, and an interference fit is adopted, so that the sealing effect is better, and the fastening of the fastening member makes the plug more firmly fixed.

[0023] Further, the fastening member is made of alloy steel.

[0024] Through the technical scheme, the alloy steel has high hardness, so that the service life of the fastening member is longer.

[0025] The utility model has the following beneficial effects:

[0026] 1. The utility model discloses an internal pressure self-sealing plug valve, which is characterized in that: opposite plug small holes and plug large holes are arranged on the plug, and the plug is rotated, when the plug small holes and the valve body inlet are communicated, the pressure of the medium will deform the plug, and the plug is tightly attached to the inner wall of the valve body, thereby sealing the liquid, so that the liquid cannot pass to the outlet, and the valve is closed, when the plug large holes and the valve body inlet are communicated, the medium flows from the valve body inlet to the outlet, and then flows out, at the same time, the pressure in the plug is increased, the plug is deformed and tightly attached to the valve body, thereby sealing the liquid, preventing the internal liquid from leaking out of the valve body, and realizing self-sealing, thereby improving the sealing performance and reliability of the plug valve, and prolonging the service life of the plug valve.

[0027] 2. The utility model discloses an internal pressure self-sealing plug valve, which is characterized in that: a fastening member, a clamping groove and a locking groove are arranged, the fastening member is inserted into the clamping groove, the end of the fastening member is buckled and locked with the locking groove, and a groove is arranged on the plug, so that the plug can be firmly installed in the valve cavity in the valve body, and the plug is convenient to disassemble and replace, thereby being convenient to maintain. ACCURACY

[0028] Figure 1 The utility model discloses an internal pressure self-sealing plug valve, which is characterized in that: a fastening member, a clamping groove and a locking groove are arranged, the fastening member is inserted into the clamping groove, the end of the fastening member is buckled and locked with the locking groove, and a groove is arranged on the plug, so that the plug can be firmly installed in the valve cavity in the valve body, and the plug is convenient to disassemble and replace, thereby being convenient to maintain.

[0029] Figure 2 The utility model discloses an internal pressure self-sealing plug valve, which is characterized in that: a fastening member, a clamping groove and a locking groove are arranged, the fastening member is inserted into the clamping groove, the end of the fastening member is buckled and locked with the locking groove, and a groove is arranged on the plug, so that the plug can be firmly installed in the valve cavity in the valve body, and the plug is convenient to disassemble and replace, thereby being convenient to maintain.

[0030] Figure 3 The utility model discloses an internal pressure self-sealing plug valve, which is characterized in that: a fastening member, a clamping groove and a locking groove are arranged, the fastening member is inserted into the clamping groove, the end of the fastening member is buckled and locked with the locking groove, and a groove is arranged on the plug, so that the plug can be firmly installed in the valve cavity in the valve body, and the plug is convenient to disassemble and replace, thereby being convenient to maintain.

[0031] Figure 4A kind of cock valve of internal pressure self-sealing is provided in the utility model, which comprises a valve body and a plug located in the valve body.

[0032] Figure 5 A kind of cock valve of internal pressure self-sealing is provided in the utility model, which comprises a valve body and a plug located in the valve body.

[0033] Legend:

[0034] 1, valve body;2, connecting pipe;3, locking cap;4, plug;5, plug end;6, rotating hand wheel;7, plug small hole;8, plug big hole;9, clamping groove;10, locking groove;11, fastening part;12, outer connecting thread;13, inner connecting thread;14, anti-skid strip. Specific embodiment

[0035] The technical solutions in the specific embodiments of the utility model will be described clearly and completely in the following combined with the drawings in the specific embodiments of the utility model. Obviously, the described specific embodiments are only part of the specific embodiments of the utility model, not all the specific embodiments. Based on the specific embodiments in the utility model, all other specific embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0036] Reference Figures 1-2 And Figure 4 , Figure 5 A specific embodiment provided by the utility model is shown in the drawings.

[0037] A kind of cock valve of internal pressure self-sealing, comprising:

[0038] Valve body 1 and plug 4 located in the valve body 1 interior;

[0039] The inside of valve body 1 is provided with valve cavity, plug 4 is rotationally arranged in the valve cavity of valve body 1, plug 4 top is connected with plug end 5, rotating hand wheel 6 is fixedly connected in plug end 5 interior, two plug small holes 7 are arranged oppositely in the side wall of plug 4, and two plug big holes 8 are arranged oppositely in the side of the side wall of plug 4;

[0040] Plug small hole 7 and plug big hole 8 are arranged oppositely on plug 4, by rotating plug 4, when rotating to make plug small hole 7 and valve body 1 import pass through, the pressure of medium will deform plug 4, close to valve body 1 inner wall, to seal liquid, so that it cannot pass to export, so that valve is closed, when rotating to make plug big hole 8 and valve body 1 import pass through, medium flows from valve body 1 import to export, then flows out, while the pressure in plug 4 rises, plug 4 is deformed and close to valve body 1, to seal liquid, prevent internal liquid from leaking out of valve body 1, to realize self-sealing, so as to improve the sealing property and reliability of plug valve, improve the service life of plug valve.

[0041] The outer diameter of the plug 4 is slightly larger than the inner diameter of the valve cavity in the valve body 1, and a groove is arranged in the middle of the plug 4, and the clamping member 11 is clamped in the groove. The outer diameter of the plug 4 is slightly larger than the inner diameter of the valve cavity in the valve body 1, and an interference fit is adopted to make the sealing effect better, and the clamping of the clamping member 11 makes the plug 4 more firmly fixed;

[0042] The two side walls of the valve body 1 are connected with the connecting pipes 2, the medium flow channels are arranged in the two connecting pipes 2, and the medium flow channels are connected with the valve cavity in the valve body 1. The valve cavity in the valve body 1 is connected with the external pipeline through the medium flow channels in the connecting pipes 2. The external threads of the connecting pipes 2 are sleeved with the locking caps 3, the outer wall of the locking caps 3 is provided with a plurality of anti-skid strips 14, the connecting pipes 2 are connected with the external pipeline through the locking caps 3, and the anti-skid strips 14 can be conveniently screwed with the locking caps 3. The outer wall of the connecting pipe 2 is provided with an outer connecting thread 12, the inner wall of the locking cap 3 is provided with an inner connecting thread 13, and the connecting pipe 2 and the locking cap 3 are connected through the outer connecting thread 12 and the inner connecting thread 13. The locking cap 3 is connected through the threads, which is convenient for dismounting and mounting.

[0043] Referring to Figures 1-3 As shown in the figure, the upper end rear wall of the valve body 1 is provided with a clamping groove 9, and the upper end of the valve body 1 is provided with two locking grooves 10 opposite to the clamping groove 9. The clamping groove 9 is clamped with the clamping member 11, the two front ends of the clamping member 11 respectively extend into the two locking grooves 10 and are connected with the locking grooves 10, the clamping member 11 is provided in a U shape, and the size of the two ends of the clamping member 11 is slightly larger than the inner diameter of the locking groove 10. The size of the two ends of the clamping member 11 is slightly larger than the inner diameter of the locking groove 10, which can make the interference fit between them, and the locking is more firm. The clamping member 11 is made of alloy steel, which has high hardness and long service life.

[0044] The clamping member 11, the clamping groove 9 and the locking groove 10 are arranged, the clamping member 11 is inserted into the clamping groove 9, and the end part is locked with the locking groove 10. In combination with the groove on the plug 4, the plug 4 can be firmly installed in the valve cavity in the valve body 1, and the plug 4 can be conveniently dismounted and replaced for maintenance.

[0045] Working principle: the internal pressure self-sealing plug valve uses, set up the plug small hole 7 and the plug big hole 8 on the plug 4, through rotating the plug 4, when rotating to make the plug small hole 7 and the valve body 1 import pass through, the pressure of medium will compress the plug 4 deformation, close the valve body 1 inner wall, further sealed liquid, make it unable to pass to the export, make the valve shut down, when rotating to make the plug big hole 8 and the valve body 1 import pass through, medium flows from the valve body 1 import to the export, then flows out, the pressure inside the plug 4 rises, compresses the plug 4 deformation close the valve body 1, further sealed liquid, prevent internal liquid leakage from the valve body 1, further realized self-sealing, thereby improved the sealing property and reliability of plug valve, improve the service life of plug valve, and set buckle 11, card slot 9 and locking slot 10, buckle 11 inserts card slot 9 inside, and its end and locking slot 10 buckle lock, again cooperate a circle of recess on the plug 4, can firmly install the plug 4 in the valve cavity inside the valve body 1, and also convenient to the plug 4 is disassembled and replaced, it is convenient to maintain.

[0046] Finally, it should be noted that: the above only for the preferred specific embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the person skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. An internally-pressurized self-sealing stopcock valve, characterized by, Include: The valve body (1) and plug (4) inside the valve body (1); The inside of the valve body (1) is provided with a valve cavity, the plug (4) is rotatably arranged in the valve cavity of the valve body (1), the top of the plug (4) is connected with the plug end head (5), the plug end head (5) is fixedly connected with the rotating hand wheel (6) through the inside, the side wall of the plug (4) is provided with two opposite plug small holes (7), the side wall of the plug (4) is provided with two plug large holes (8) opposite to the side of the plug small hole (7); The upper end of the valve body (1) is provided with a clamping groove (9), the upper end of the valve body (1) is provided with two locking grooves (10) opposite to the clamping groove (9), the clamping groove (9) is provided with a buckling member (11), the two front ends of the buckling member (11) extend into the two locking grooves (10) and are connected with the locking grooves (10).

2. The internally-pressurized self-sealing faucet valve of claim 1, wherein: The two side walls of the valve body (1) are provided with a connecting pipe (2), the two connecting pipes (2) are provided with a medium flow channel, and the medium flow channel is communicated with the valve cavity in the valve body (1).

3. A self-sealing plug valve according to claim 2, wherein: The outer wall of the connecting pipe (2) is provided with a locking cap (3), and the outer wall of the locking cap (3) is provided with a plurality of anti-skid strips (14).

4. The internally-pressurized self-sealing faucet valve of claim 1, wherein: The buckling member (11) is provided with a U-shaped structure, and the size of the two ends of the buckling member (11) is greater than the inner diameter of the locking groove (10).

5. The internally-pressurized self-sealing faucet valve according to claim 3, wherein: The outer wall of the connecting pipe (2) is provided with an outer connecting thread (12), the inner wall of the locking cap (3) is provided with an inner connecting thread (13), and the connecting pipe (2) and the locking cap (3) are connected by the outer connecting thread (12) and the inner connecting thread (13).

6. The internally-pressurized self-sealing faucet valve according to claim 1, wherein: The outer diameter of the plug (4) is greater than the inner diameter of the valve cavity in the valve body (1), and the middle part of the plug (4) is provided with a groove, and the buckling member (11) is arranged in the groove.

7. The internally-pressurized self-sealing faucet valve according to claim 1, wherein: The buckling member (11) is made of alloy steel material.

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