CN210510367U - Ball valve support and ball valve thereof - Google Patents

Abstract

The utility model discloses a ball valve support and ball valve thereof, the ball valve support comprises a support and a stuffing box, a step groove is arranged on the valve body, two ends of the support are respectively arranged on the step groove, a support stud is screwed with the valve body through screw threads after passing through the support and is assembled and fixed, the support stud is positioned on one side of the support away from the valve body and is also screwed with a support nut through screw threads and is assembled and fixed, the support nut and the support stud are assembled and matched through screw threads to compress the end part of the support in the step groove; the stuffing box is fixed on the valve body, and one end of a valve rod arranged in the valve body penetrates out of the stuffing box, the stuffing pressing plate and the support through hole and then is assembled with an external actuating mechanism; the packing pressing plate is tightly pressed on the end face of the packing box, the end face of the packing box is fixedly assembled with one end of a stud of the packing pressing plate respectively, the stud of the packing pressing plate penetrates through the packing pressing plate and then is sleeved with the disc spring and the nut of the packing pressing plate respectively, and the nut of the packing pressing plate and the stud of the packing pressing plate are assembled in a screwing mode through threads, so that the stud of the packing pressing plate tightly presses the packing pressing plate to the end face of the packing.

Description

Ball valve support and ball valve thereof

Technical Field

The utility model relates to a ball valve especially relates to a ball valve support and ball valve thereof, and it is applicable to high-pressure heavy-calibre high moment of torsion and cuts ball valve and cut executor connection structure design, application fast.

Background

At present, in most program-controlled fast-cutting ball valves fields such as refining, coal chemical industry, aerospace test systems and the like, pneumatic or hydraulic control is mostly adopted as a fast-cutting actuator for model selection, a packing box is arranged on a valve body, a support is installed on the packing box by using a fastener, when the valve is opened and closed fast, the speed is high, and the torque is large to generate an emergency stop action when the valve is opened and closed at the final position, so most fast-cutting acting forces directly act on the packing box fastener through the actuator and the support, the packing box fastener is subjected to large shearing stress, after the operation is frequently opened and closed by long-time fast-cutting action, the fastener is failed, the failure of a valve bearing boundary is further caused, and transmission chain system parts such as a valve rod, the packing box and.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of the prior art, the utility model aims to solve the technical problem that a ball valve support and ball valve thereof are provided, its ball valve support structure is reliable, processing is simple and convenient and can prevent its inboard spare part departure.

To achieve the above object, the present invention provides

The utility model has the advantages that: the utility model discloses a support adopts whole bending to make, for present most adoption manufacturing process such as casting, tailor-welding, the utility model discloses the support has characteristics such as the process velocity is fast, low in manufacturing cost, the appearance is pleasing to the eye. Install additional in addition the utility model discloses a can prevent behind the support that the inside spare part departure of support to reduce the potential safety hazard. In addition, whether the packing pressing plate is displaced or generates plastic deformation is detected through a detection circuit, so that a manager can conveniently and timely discharge hidden dangers or timely overhaul.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic structural diagram of the present invention.

Fig. 5 is a schematic structural view of the present invention with additional wires.

Fig. 6 is a block diagram of the detection circuit of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 to 4, the ball valve support of the present embodiment is mounted on a valve body 1 of a ball valve, and includes a support 4 and a stuffing box 5, where the valve body 1 is provided with a step groove 102 and a positioning hole 101, two ends of the support 4 are respectively mounted on the step groove 102, the positioning hole 101 is in snap fit with a large end 1102 of a support pin 11, the support 4 is provided with a support positioning hole 401, and the support positioning hole 401 is in fit with a small end 1101 of the support pin 11, so as to realize positioning between the support 4 and the step groove 102 through the support pin 11. The diameter of the large end of support pin 11 is greater than the diameter of small end 1101, so that it is possible to prevent support pin 11 from falling off due to loose fit between support pin 11 and support positioning hole 401 after long-term operation.

The support stud 3 penetrates through the support 4 and then is assembled and fixed with the valve body 1 in a screwing mode through threads, and the support stud 3 is positioned on one side, away from the valve body 1, of the support 4 and is also assembled and fixed with the support nut 2 in a screwing mode through threads, so that the end of the support 4 is pressed in the step groove 102 through the threaded assembly of the support nut 2 and the support stud 3;

the stuffing box 5 is fixed on the valve body 1, one end of a valve rod 10 installed in the valve body 1 penetrates out of the stuffing box 5, the stuffing pressing plate 7 and the support through hole 402 and then is assembled with an external actuating mechanism, and the external actuating mechanism is used for driving the valve rod 10 to rotate circumferentially, so that a ball body inside the ball valve is driven to rotate synchronously to control the on-off or communication section of the ball valve.

The packing pressing plate 7 is tightly pressed on the end face of the packing box 5, the end face of the packing box 5 is fixedly assembled with one end of a packing pressing plate stud 6, the packing pressing plate stud 6 penetrates through the packing pressing plate 7 and then is sleeved with the disc spring 8 and the packing pressing plate nut 9, and the packing pressing plate nut 9 and the packing pressing plate stud 6 are assembled in a screwing mode through threads, so that the packing pressing plate stud 6 tightly presses the packing pressing plate 7 to the end face of the packing box 5, and the valve rod forms pressure-bearing boundary sealing.

The packing press plate studs 6 are uniformly distributed in the circumferential direction of the valve rod 10, and the center distance D1 (the diameter of a circle where the axes of the two packing press plate studs 6 are located), the outer diameter D2 of the packing press plate 7 and the diameter D of the support through hole 402 are related as follows: d < max (D1, D2), namely the diameter D of the bracket through hole 402 is positioned between the diameter of the valve rod and one of the maximum values of the center distance D1 of the stud of the packing press plate and the outer diameter D2 of the packing press plate 7. The design can ensure that the stud 6 of the packing pressing plate, the packing pressing plate 7, the disc spring group 8, the nut 9 of the packing pressing plate and the valve rod 10 cannot fly out of the bracket 4 to cause accidents after the stud 6 of the packing pressing plate fails or the nut 9 of the packing pressing plate is loosened by misoperation, and the safety of the packing pressing plate is greatly improved. Of course, D < max (D1, D2) is not a requirement for preventing fly-out, since the bracket itself is fly-out-proof, but the design also prevents fly-out from the bracket through-hole 402.

Preferably, the quick-cut actuator is fixed to the support 4, and in use, the force of the quick-cut actuator acts on the valve body through the support, so that the stuffing box and the fasteners are not subjected to the quick-cut shear stress of the actuator.

Referring to fig. 5-6, based on the concept of preventing damage in the past or finding damage in time for timely maintenance, the applicant believes that the limit value of the tension between the packing pressing plate 7 and the packing box 5 (reaching the tension value at which the packing pressing plate 7 can fly out) is found in time to inform a manager of maintenance in time, so as to prevent explosive parts from flying out, and the maintenance is advanced, so that large-area damage can be avoided, and the maintenance cost is reduced; in addition, the explosion-proof type parts need to be overhauled in time after flying out to prevent leakage. The mode of manual inspection and even video monitoring inspection is very dependent on people and cannot achieve all-weather detection, and the applicant proposes that the function is achieved by adopting a detection circuit.

The detection circuit comprises a lead 13 with an insulating layer wrapped outside, the lead 13 is fixedly assembled with a first fixing ring 12 and a second fixing ring 14 respectively, the first fixing ring 12 is sleeved on a filler pressing plate stud 6 and is pressed to a filler pressing plate 7 through a filler pressing plate nut 9, the second fixing ring 14 is fixed on the outer wall of the stuffing box 5 through a screw 15, the lead 13 is in a tightening state, one end of the lead 13 is connected with a resistor in series and then is electrically connected with a negative electrode access end of a current sensor, an anode access end of the current sensor is electrically connected with an anode of a constant current source, the other end of the lead is electrically connected with a cathode of the constant current source, and a signal end of the current sensor is in communication connection with a signal end of. The current sensor is used for detecting whether current exists in the lead, the resistor is used for providing complexity for the current, the constant current source is used for providing stable direct current, and an AC-DC converter, a battery and the like can be selected in the embodiment.

Once the displacement occurs between the packing pressing plate 7 and the stuffing box 5, the wire 13 can bear large pulling force, once the pulling force breaks the wire 13, the current value detected by the current sensor is zero, and at the moment, the MCU judges that the displacement between the packing pressing plate 7 and the stuffing box 5 reaches the limit value, so that a manager is informed to timely process the displacement through a preset warning mode, and the hidden danger of the flying out of the parts or the flying out condition of the parts can be timely found. The warning mode of this embodiment can be through popping the frame warning on the display or be connected MCU and audible-visual annunciator's signal end communication, control audible-visual annunciator through MCU and send audible-visual alarm and warn.

The details of the present invention are well known to those skilled in the art.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (7)

1. The utility model provides a ball valve support, its installs on the valve body of ball valve, including support, stuffing box, characterized by: the valve body is provided with a step groove, two ends of the bracket are respectively arranged on the step groove,

the support stud penetrates through the support and then is screwed and assembled and fixed with the valve body through threads, the support stud is positioned on one side of the support, which is far away from the valve body, and is also screwed and assembled and fixed with the support nut through threads, and the support nut and the support stud are screwed and assembled through threads to press the end part of the support in the step groove;

the stuffing box is fixed on the valve body, and one end of a valve rod arranged in the valve body penetrates out of the stuffing box, the stuffing pressing plate and the support through hole and then is assembled with an external actuating mechanism;

the packing pressing plate is tightly pressed on the end face of the packing box, the end face of the packing box is fixedly assembled with one end of a stud of the packing pressing plate, the stud of the packing pressing plate penetrates through the packing pressing plate and then is sleeved with the disc spring and the nut of the packing pressing plate, and the nut of the packing pressing plate and the stud of the packing pressing plate are assembled in a screwing mode through threads, so that the stud of the packing pressing plate tightly presses the packing pressing plate to the end face of the packing box.

2. A ball valve holder according to claim 1, wherein: the packing pressing plate studs are uniformly distributed in the circumferential direction of the valve rod, and the center distance D1 of the packing pressing plate studs, the outer diameter D2 of the packing pressing plate and the diameter D of the support through hole are in the following relation: d < max (D1, D2).

3. A ball valve holder according to claim 1, wherein: the valve body is provided with a positioning hole, the positioning hole is clamped and assembled with the large end of the support pin shaft, the support is provided with a support positioning hole, and the support positioning hole is assembled with the small end of the support pin shaft.

4. A ball valve holder according to claim 3, wherein: the diameter of the large end of the support pin shaft is larger than that of the small end.

5. A ball valve holder according to claim 1, wherein: the external actuating mechanism is a quick-cut actuator which is fixed on the bracket.

6. A ball valve holder according to any one of claims 1 to 5, wherein: the detection circuit comprises a lead wrapped with an insulating layer, the lead is respectively assembled and fixed with a first fixing ring and a second fixing ring, the first fixing ring is sleeved on a stud of the packing press plate and is tightly pressed on the packing press plate through a nut of the packing press plate, the second fixing ring is fixed on the outer wall of the packing box through a screw, the lead is in a tightened state, one end of the lead is connected with a resistor in series and then is electrically connected with a negative electrode access end of the current sensor, a positive electrode access end of the current sensor is electrically connected with a positive electrode of the constant current source, the other end of the lead is electrically connected with a negative electrode of the constant current source, and a signal end of the current sensor is in communication connection with a signal;

the current sensor is used for detecting whether current exists in the lead, the resistor is used for providing complexity for the current, and the constant current source is used for providing stable direct current.

7. A ball valve is characterized in that: use of a ball valve holder according to any of claims 1-6.

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