Two-piece forged steel ball valve

Abstract

This utility model discloses a two-piece forged steel ball valve, comprising an extension rod, a pressure plate, a disc washer, and a clamping nut. The bottom end of the extension rod is sleeved and clamped onto the top end of the valve stem, and one end of the handle is sleeved and clamped onto the top end of the extension rod. A locking nut for clamping the handle is screwed onto the top end of the extension rod. Both connecting plates have connecting holes on their tops, and the handle has a through hole corresponding to the connecting hole. A locking device is installed between the through hole and the corresponding connecting hole. Advantages: By driving the handle, the extension rod rotates, which in turn drives the valve stem to rotate synchronously. The extension rod raises the installation position of the handle, making it easier to bypass surrounding pipes. Operation of the handle is not limited by space, making it convenient. Furthermore, after operating the ball valve through the handle, the locking device connects and locks the handle and the corresponding connecting plate to prevent accidental operation by other personnel, thus eliminating safety hazards.

Description

Technical field:

[0001] The utility model relates to the technical field of valve equipment, in particular to a two-piece forged steel ball valve. Background technology:

[0002] A ball valve is a valve whose opening and closing parts (ball valve core) are driven by a valve stem and rotate around the axis of the ball valve. It is installed on a pipeline and is used to open and close fluid media. It is widely used in water treatment, petrochemical, food and beverage, pharmaceutical and other industries. Currently, the valve core of a ball valve is usually made of metal and the valve seat is made of plastic. During the opening and closing process of the valve core, the friction between the valve core and the valve seat will generate static electricity. In addition, the valve body of a ball valve is usually a casting with poor pressure resistance. When a ball valve is used on a pipeline that transports high-pressure flammable fluid media, there is not only a risk of fire caused by static electricity in the flammable media, but also a risk of medium leakage due to valve body damage due to long-term operation under high pressure.

[0003] In addition, when there are many pipelines arranged at the production site and the spacing between the pipelines is small, the space for the handle used to operate the opening and closing of the ball valve is limited, making it inconvenient to operate; and for the ball valve on the pipeline conveying high-pressure flammable media, if it is operated incorrectly or not opened and closed according to the process requirements, there are serious safety hazards. Utility model content:

[0004] The utility model aims to provide a two-piece forged steel ball valve which is easy to operate and can effectively avoid potential safety hazards.

[0005] The utility model is implemented by the following technical scheme: a two-piece forged steel ball valve, which includes a valve body, a valve core and a valve stem; a valve cover is sealed and fastened at an open end of the valve body, the valve core is rotatably arranged in the valve body, valve seats are respectively installed in the valve body and the valve cover on both sides of the valve core, a valve stem is sealingly penetrated by the valve body directly above the valve core, and the bottom end of the valve stem is inserted into the valve core; a blind hole coaxial with the valve stem is opened on the top surface of the valve body, a packing placed at the bottom of the blind hole is sleeved on the valve stem, and a pressing sleeve pressed on the packing is sleeved on the valve stem; it also includes a handle, a heightening rod, and a pressure plate, a disc washer and a compression nut which are sequentially sleeved on the valve stem; the disc washer abuts against the pressing sleeve, and the The pressure plate is sleeved outside the pressure sleeve and fixed to the valve body by a limit screw, and a fixing nut is threadedly mounted on the limit screw and abuts against the pressure plate; two connecting plates extending upward are integrally formed at the edge of the pressure plate, and the two connecting plates are arranged at a 90° angle around the valve stem; the bottom end of the height-increasing rod is sleeved and clamped on the top end of the valve stem, and one end of the handle is sleeved and clamped on the top end of the height-increasing rod, and a locking nut for tightening the handle is threadedly mounted on the top end of the height-increasing rod; connecting holes are provided on the tops of the two connecting plates, and through holes corresponding to the connecting holes are provided on the handle, and a mounting lock is passed between the through holes and the corresponding connecting holes; the valve body and the valve cover are forged parts.

[0006] Furthermore, the valve stem includes a connecting portion, a threaded portion, an optical axis portion, a stepped portion and a driving portion from top to bottom, and both the connecting portion and the driving portion are provided with symmetrical vertical sections, and the two vertical sections of the connecting portion are perpendicular to the two vertical sections of the driving portion.

[0007] Furthermore, a hole matching the shape of the connecting portion of the valve stem is provided at the bottom end of the height-increasing rod.

[0008] Furthermore, a positioning hole is provided in the valve body coaxially with the valve stem, a thrust washer sleeved on the optical axis portion is provided at the bottom of the positioning hole, and the stepped portion is clamped on the thrust washer.

[0009] Furthermore, countersunk holes are respectively opened on the side wall of the optical axis part and the plane of the driving part, and springs and balls are arranged in the countersunk holes in sequence. The balls in the optical axis part abut against the valve body, and the balls in the driving part abut against the valve core.

[0010] Furthermore, it also includes a limit plate, which is mounted on the connection portion between the height-increasing rod and the clamping nut and is clamped thereon. Two limit blocks are integrally formed on the edge of the limit plate, and the two limit blocks are arranged around the valve stem at an angle of 90°; the limit block is in movably contact with the top of the limit screw.

[0011] The utility model has the advantages that the heightening rod is driven to rotate by driving the handle, and the heightening rod drives the valve stem to rotate synchronously; the installation position of the handle is raised by the heightening rod, which is convenient for bypassing surrounding pipes, and the handle is not restricted by space when operating, and the operation is convenient; after the ball valve is operated by the handle, in order to avoid misoperation by other staff, the handle and the corresponding connecting plate are connected and locked by a lock, which is conducive to eliminating safety hazards.

[0012] Under the action of the spring, the valve body and valve core corresponding to the ball always maintain good contact, ensuring that the static electricity generated at the valve core is transferred to the valve body through the spring and the ball and released, preventing the static electricity from igniting the medium in the valve body and thus avoiding the occurrence of fire.

[0013] The valve body and valve cover are forged parts, which are resistant to high pressure, which is beneficial to prolong the service life of the valve body and valve cover and avoid safety hazards under the action of long-term high-pressure fluid media. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 for Figure 1 AA section view.

[0016] Figure 3 It is a structural schematic diagram of the valve stem of the utility model.

[0017] Figure 4 for Figure 3 Right view of .

[0018] Figure 5 for Figure 3 Longitudinal section of .

[0019] Figure 6 It is a three-dimensional structural schematic diagram of the utility model when in use.

[0020] The components in the accompanying drawings are marked as follows: valve body 1, valve cover 2, valve core 3, valve seat 4, valve stem 5, connecting part 5.1, threaded part 5.2, optical axis part 5.3, stepped part 5.4, driving part 5.5, blind hole 6, packing 7, pressing sleeve 8, pressing plate 9, limit screw 10, fixing nut 11, connecting plate 12, handle 13, raising rod 14, disc washer 15, clamping nut 16, locking nut 17, connecting hole 18, through hole 19, lock 20, positioning hole 21, thrust washer 22, countersunk hole 23, spring 24, ball 25, limit plate 26, limit block 27. Specific implementation method:

[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] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figures 1 to 6 As shown, the present embodiment provides a two-piece forged steel ball valve, which includes a valve body 1, a valve core 3 and a valve stem 5; the valve body 1 is sealed and buckled at one end of the open end, and a valve cover 2 is installed by screws, and a sealing ring is provided at the joint between the valve cover 2 and the valve body 1; a valve core 3 is rotatably provided in the valve body 1, and valve seats 4 are respectively installed in the valve body 1 and the valve cover 2 on both sides of the valve core 3, and the valve core 3 is in sealing and movable contact with the valve seat 4; a valve stem 5 is sealed and penetrated through the valve body 1 just above the valve core 3, and the bottom end of the valve stem 5 is inserted into the valve core 3; the valve stem 5 is rotated to drive the valve core 3 to rotate, so as to realize the opening and closing of the ball valve; the valve body 1 and the valve cover 2 are forged parts, which are resistant to high pressure, so as to prolong the service life of the valve body 1 and the valve cover 2 and avoid the safety hazards under the action of long-term high-pressure fluid medium.

[0024] The valve stem 5 comprises, from top to bottom, a connecting portion 5.1, a threaded portion 5.2, a smooth axis portion 5.3, a stepped portion 5.4 and a driving portion 5.5. Symmetrical vertical sections are arranged on the connecting portion 5.1 and the driving portion 5.5. The two vertical sections of the connecting portion 5.1 are perpendicular to the two vertical sections of the driving portion 5.5. A blind hole 6 coaxial with the valve stem 5 is opened on the top surface of the valve body 1. A packing 7 placed at the bottom of the blind hole 6 is slidably sleeved on the smooth axis portion 5.3 of the valve stem 5. A pressing sleeve 8 pressed on the packing 7 is sleeved on the smooth axis portion 5.3 of the valve stem 5. The upper part of the pressing sleeve 8 protrudes out of the blind hole 6.

[0025] It also includes a handle 13, a heightening rod 14, and a pressure plate 9, a disc washer 15 and a clamping nut 16 which are sequentially sleeved on the valve stem 5; the disc washer 15 abuts against the pressing sleeve 8, the pressure plate 9 is sleeved outside the pressing sleeve 8 and fixed to the valve body 1 by a limit screw 10, and a fixing nut 11 which is threadedly connected to the pressure plate 9 is sleeved on the limit screw 10 to fix the position of the pressure plate 9; a clamping nut 16 is threadedly connected on the threaded portion 5.2 of the valve stem 5, the disc washer 15 is pressed against the pressing sleeve 8, the packing 7 is pressed, and the disc washer 15 plays an effective anti-loosening role.

[0026] The edge of the pressure plate 9 is integrally formed with two connecting plates 12 extending vertically upward, and the two connecting plates 12 are arranged at a 90° angle around the valve stem 5, and connecting holes 18 are opened on the top of the two connecting plates 12; a limit plate 26 is sleeved on the connecting part 5.1 and is clamped, and two limit blocks 27 are integrally formed on the edge of the limit plate 26, and the two limit blocks 27 are arranged at a 90° angle around the valve stem 5, and the limit blocks 27 are in active contact with the top of the limit screw 10; the limit plate 26 and the limit block 27 rotate synchronously with the rotation of the valve stem 5, and the position of the limit block 27 is limited by the limit screw 10 to ensure that the valve stem 5 drives the valve core 3 to rotate at a 90° angle, and the positive and reverse rotations correspond to realize the opening and closing of the ball valve.

[0027] The bottom end of the heightening rod 14 is provided with a hole matching the shape of the connecting portion 5.1 of the valve stem 5. The bottom end of the heightening rod 14 is sleeved and connected to the top end of the valve stem 5. The height of the heightening rod 14 corresponds to the height of the connecting plate 12. One end of the handle 13 is sleeved and connected to the top end of the heightening rod 14. The top end of the heightening rod 14 is sleeved with a locking nut 17 threadedly connected with the clamping handle 13. The handle 13 is pressed against the heightening rod 14. By driving the handle 13, the heightening rod 14 is driven to rotate, and the valve stem is driven by the heightening rod 14. 5 synchronous rotation; a through hole 19 corresponding to the connecting hole 18 is opened on the handle 13, and a mounting lock 20 is passed between the through hole 19 and the corresponding connecting hole 18; the mounting position of the handle 13 is raised by the heightening rod 14, which is convenient for bypassing the surrounding pipelines, and the handle 13 is not restricted by space when operating, and the operation is convenient; and after the ball valve is operated by the handle 13, in order to avoid misoperation by other staff, the handle 13 and the corresponding connecting plate 12 are connected and locked by the lock 20, which is conducive to eliminating safety hazards.

[0028] A positioning hole 21 is provided in the valve body 1 coaxially with the valve stem 5, and a thrust washer 22 sleeved on the optical axis portion 5.3 is provided at the bottom of the positioning hole 21, and the stepped portion 5.4 is clamped on the thrust washer 22; when the valve stem 5 is installed, when the clamping nut 16 is tightened, the stepped portion 5.4 of the valve stem 5 can press the thrust washer 22 against the bottom of the positioning hole 21, so that the valve stem 5 always remains in a vertical state during the operation process, thereby avoiding the valve stem 5 from tilting during the operation process.

[0029] Countersunk holes 23 are respectively provided on the side wall of the optical axis portion 5.3 and the plane of the driving portion 5.5, and springs 24 and balls 25 are arranged in the countersunk holes 23 in sequence. The balls 25 in the optical axis portion 5.3 abut against the valve body 1, and the balls 25 in the driving portion 5.5 abut against the valve core 3. Under the action of the spring 24, the valve body 1 and valve core 3 corresponding to the balls 25 always maintain good contact, ensuring that the static electricity generated at the valve core 3 is transmitted to the valve body 1 through the spring 24 and the balls 25 and released, thereby preventing the static electricity from igniting the medium in the valve body 1, thereby preventing the occurrence of fire.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-piece forged steel ball valve, comprising a valve body, a valve core and a valve stem; a valve cover is sealed and fastened at an open end of the valve body, the valve core is rotatably arranged in the valve body, valve seats are respectively installed in the valve body and the valve cover on both sides of the valve core, a valve stem is sealed and penetrated through the valve body directly above the valve core, and the bottom end of the valve stem is inserted into the valve core; a blind hole coaxial with the valve stem is opened on the top surface of the valve body, a packing placed at the bottom of the blind hole is sleeved on the valve stem, and a press sleeve pressed on the packing is sleeved on the valve stem; It is characterized in that It also includes a handle, a heightening rod, and a pressure plate, a disc washer and a compression nut which are sequentially sleeved on the valve stem; the disc washer abuts against the pressure sleeve, the pressure plate is sleeved outside the pressure sleeve and fixed to the valve body by a limit screw, and a fixing nut which abuts against the pressure plate is sleeved on the limit screw; two connecting plates extending upward are integrally formed on the edge of the pressure plate, and the two connecting plates are arranged around the valve stem at an angle of 90°; The bottom end of the height-increasing rod is sleeved and clamped on the top end of the valve stem, one end of the handle is sleeved and clamped on the top end of the height-increasing rod, and the top end of the height-increasing rod is sleeved and threaded with a locking nut for tightening the handle; connecting holes are provided on the tops of the two connecting plates, through holes corresponding to the connecting holes are provided on the handles, and a mounting lock is passed between the through holes and the corresponding connecting holes; the valve body and the valve cover are forged parts.

2. The two-piece forged steel ball valve according to claim 1, characterized in that: The valve stem includes a connecting portion, a threaded portion, an optical axis portion, a stepped portion and a driving portion from top to bottom. The connecting portion and the driving portion are both provided with symmetrical vertical sections, and the two vertical sections of the connecting portion are perpendicular to the two vertical sections of the driving portion.

3. The two-piece forged steel ball valve according to claim 2, characterized in that: The bottom end of the height-increasing rod is provided with a hole matching the shape of the connecting portion of the valve stem.

4. The two-piece forged steel ball valve according to claim 2, characterized in that: A positioning hole is provided in the valve body coaxially with the valve stem, a thrust washer sleeved on the optical axis portion is provided at the bottom of the positioning hole, and the stepped portion is clamped on the thrust washer.

5. The two-piece forged steel ball valve according to claim 2, characterized in that: Countersunk holes are respectively provided at the side wall of the optical axis part and the plane of the driving part. Springs and balls are arranged in the countersunk holes in sequence. The balls in the optical axis part abut against the valve body, and the balls in the driving part abut against the valve core.

6. The two-piece forged steel ball valve according to any one of claims 2 to 5, characterized in that: It also includes a limit plate, which is mounted on the connection portion between the height-increasing rod and the clamping nut and is clamped thereon. Two limit blocks are integrally formed on the edge of the limit plate, and the two limit blocks are arranged around the valve stem at an angle of 90°; the limit block is in active contact with the top of the limit screw.

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