Flow limiting structure of regulating valve

Abstract

The utility model belongs to the technical field of regulating valves, and particularly relates to a regulating valve flow limiting structure which comprises a valve body, a screw rod is movably connected to the top of the valve body, a rotating rod is fixedly connected to the top end of the screw rod, two limiting rods are fixedly connected to the top of the valve body, and the same connecting seat is fixedly connected to the top ends of the two limiting rods. The screw rod is movably connected with the connecting base, the side walls of the two limiting rods are movably connected with the same positioning plate, the top surface of the positioning plate is rotatably connected with a cylinder, the screw rod penetrates through the cylinder, a limiting assembly is arranged on the side wall of the cylinder, and two locking assemblies are arranged on the side wall of the positioning plate in a bilateral symmetry mode. The screw rod on the control valve can be locked and protected, the stability and reliability of the screw rod are further improved, and meanwhile corrosion to the screw rod caused by the nature can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of regulating valve, specifically relates to a regulating valve flow limiting structure. BACKGROUND

[0002] The regulating valve flow limiting refers to the control of the flow of the regulating valve within a set range through certain technical means and devices, and the common regulating valve controls the flow by rotating the screw rod, thus having the characteristics of simple and stable structure, convenient maintenance and the like.

[0003] However, for the control valve with large flow, the length of the screw rod is often large, thus a part of the screw rod is exposed, and the screw rod is prone to loosening due to vibration and human factors and other factors for a long time exposed to the nature, so that the flow of the medium in the pipeline controlled by the control valve changes, the delivery of the medium is affected, and the stability of the control valve is reduced, which is not conducive to practical application. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a regulating valve flow limiting structure which can lock and protect the screw rod on the control valve, further improve the stability and reliability of the screw rod, and reduce the corrosion of the screw rod caused by the nature.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A regulating valve flow limiting structure, comprising a valve body, a screw rod movably connected to the top of the valve body, a rotating rod fixedly connected to the top end of the screw rod, two limiting rods fixedly connected to the top of the valve body, a same connecting seat fixedly connected to the top end of the two limiting rods, the screw rod movably connected to the connecting seat, a same positioning plate movably connected to the side wall of the two limiting rods, a cylinder rotatably connected to the top surface of the positioning plate, the screw rod penetrating through the cylinder, a limiting assembly arranged on the side wall of the cylinder, and two locking assemblies symmetrically arranged on the side wall of the positioning plate.

[0007] The limiting assembly comprises a through hole formed in the side wall of the cylinder, a plug rod movably connected in the through hole, a rotating plate fixedly connected to one end of the plug rod, a plurality of equidistant insertion holes formed in the side wall of the screw rod along the axial direction, the other end of the plug rod matched with the insertion hole, a spring sleeved on the side wall of the plug rod, and the two ends of the spring fixedly connected with the cylinder and the rotating plate.

[0008] A through groove is formed in the side wall of the through hole, a rectangular block is fixedly connected to the side wall of the plug rod, the rectangular block is matched with the through groove, and a limiting groove is formed in the side wall of the cylinder.

[0009] A positioning ring is fixedly connected to the side wall of the cylinder, a positioning groove is formed in the side wall of the positioning plate, and the positioning ring is rotatably connected with the positioning groove.

[0010] The locking assembly comprises a bolt threadedly connected to the side wall of the positioning plate, and the side wall of the limiting rod is provided with a guide groove, and the bolt is in abutment with the side wall of the guide groove.

[0011] The side wall of the screw rod is sleeved with a rubber ring in an accordion structure.

[0012] The technical effects achieved by the utility model are as follows:

[0013] The adjusting valve flow limiting structure of the utility model can lock and protect the screw rod on the control valve through the mutual cooperation between the valve body, the screw rod, the positioning plate, the limiting assembly and the locking assembly, ensure that the screw rod is always at a set position, effectively solve the problem that the traditional screw rod is prone to shaking due to external factors, further improve the stability and reliability of the screw rod, and can reduce the corrosion of the screw rod caused by the nature, prolong the service life of the screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective view of the utility model embodiment;

[0015] Figure 2 is a partial structure schematic view of the utility model embodiment;

[0016] Figure 3 is a structure schematic view of the limiting assembly of the utility model embodiment;

[0017] Figure 4 is a cross-sectional structure schematic view of the cylinder of the utility model embodiment;

[0018] Figure 5 is an enlarged view of A in the utility model embodiment Figure 2

[0019] In the drawings, the components represented by each reference numeral are listed as follows:

[0020] 1, valve body; 2, screw rod; 3, rotating rod; 4, limiting rod; 5, positioning plate; 6, cylinder; 7, insertion rod; 8, rotating plate; 9, spring; 10, rectangular block; 11, through groove; 12, limiting groove; 13, positioning ring; 14, positioning groove; 15, bolt; 16, guide groove; 17, rubber ring; 18, insertion hole. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the utility model more clear and obvious, the utility model is specifically described below in combination with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope specifically requested by the utility model.

[0022] For example, Figures 1-5 ​As shown, a flow limiting structure for a regulating valve includes a valve body 1. A screw 2 is movably connected to the top of the valve body 1, and a rotating rod 3 is fixedly connected to the top of the screw 2. The structure and principle of the valve body 1, screw 2, and rotating rod 3 are existing mature technologies and will not be described in detail in this solution. Two limiting rods 4 are fixedly connected to the top of the valve body 1, and the top of the two limiting rods 4 is fixedly connected to the same connecting seat. The screw 2 is movably connected to the connecting seat. The side walls of the two limiting rods 4 are movably connected to the same positioning plate 5. A cylinder 6 is rotatably connected to the top surface of the positioning plate 5. The screw 2 passes through the cylinder 6. Limiting components are provided on the side walls of the cylinder 6, and two locking components are symmetrically arranged on the left and right sides of the positioning plate 5.

[0023] like Figure 2 and Figure 3 As shown, the limiting component includes a through hole opened in the side wall of the cylinder 6, a rod 7 is movably connected in the through hole, a rotating plate 8 is fixedly connected to one end of the rod 7, a number of equidistant insertion holes 18 are opened in the side wall of the screw 2 along the axial direction, the other end of the rod 7 is adapted to the insertion hole 18, and a spring 9 is sleeved on the side wall of the rod 7, and the two ends of the spring 9 are fixedly connected to the cylinder 6 and the rotating plate 8 respectively.

[0024] A through groove 11 is provided on the side wall of the through hole, and a rectangular block 10 is fixedly connected to the side wall of the insertion rod 7. The rectangular block 10 is adapted to the through groove 11, and a limit groove 12 is provided on the side wall of the cylinder 6.

[0025] Specifically, the insert rod 7 and spring 9 are initially inserted into the socket 18. When it is necessary to control the rotation of the screw 2, the insert rod 7 needs to be pulled out of the socket 18 first, and the rotating plate 8 is rotated to make the rectangular block 10 correspond to the limiting groove 12. Then, the spring 9 is used to push the rectangular block 10 into the limiting groove 12. At this time, the spring 9 has both restoring force and torsional force. This method is only temporary. After the valve controls the flow rate of the pipeline to a suitable state, the limiting component can be reset to limit the screw 2.

[0026] like Figure 4 As shown, a positioning ring 13 is fixedly connected to the side wall of the cylinder 6, and a positioning groove 14 is opened on the side wall of the positioning plate 5. The positioning ring 13 and the positioning groove 14 are rotatably connected.

[0027] To further adapt to the position of the socket 18, the cylinder 6 is set to a rotating mode, which can be freely adjusted to facilitate the accurate insertion of the plug rod 7 into the socket 18, thereby effectively improving its flexibility.

[0028] like Figure 2As shown, the locking assembly includes a bolt 15 threaded on the side wall of the positioning plate 5, the side wall of the limiting rod 4 is provided with a guide groove 16, and the bolt 15 abuts against the side wall of the guide groove 16. Among them, the locking assembly can fix the positioning plate 5 on the limiting rod 4, and on the other hand, through the fixing of the positioning plate 5, the limiting assembly can also play an auxiliary fixing purpose, so that the screw rod 2 and the limiting assembly are in a state of being unable to move.

[0029] As shown in the figure, Figure 1 As shown, the side wall of the screw rod 2 is sleeved with a rubber ring 17, and the rubber ring 17 is in an accordion structure.

[0030] Specifically, the rubber ring 17 can be stretched or compressed with the up-down height of the positioning plate 5, and the two ends of the rubber ring 17 are connected with the connecting seat and the valve body 1 respectively, which seals the screw rod 2, reduces the rust problem of the screw rod 2 caused by rain and snow corrosion, and prolongs the service life of the screw rod 2.

[0031] The working principle of the utility model is: when the flow state in the pipeline is adjusted by rotating the screw rod 2, the screw rod 2 is locked according to the current state of the screw rod 2, the bolt 15 is loosened to release the fixation of the positioning plate 5, then the positioning plate 5 is moved along the limiting rod 4 to the appropriate position, then the angle of the cylinder 6 is adjusted according to the position of the insertion hole 18, so that the insertion rod 7 and one of the insertion holes 18 can be in the same axial position, then the rotating plate 8 is pulled outward to drive the rectangular block 10 to disengage from the limiting groove 12 through the insertion rod 7, and the insertion rod 7 is restored to the initial angle by the rebound of the spring 9, at this time, the rectangular block 10 is opposite to the through groove 11, the rotating plate 8 is loosened, the insertion rod 7 is inserted into the corresponding insertion hole 18 through the rebound of the spring 9, the locking of the screw rod 2 is realized, then the two side bolts 15 are tightened, the fixation of the positioning plate 5 is completed, the stability is further ensured, and the problem of shaking or displacement of the screw rod 2 caused by external factors is avoided.

[0032] The above is only the preferred embodiment of the utility model, it should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, which should also be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A flow limiting structure for a regulating valve, characterized in that: The utility model provides a valve body (1), the screw rod (2) top movable joint has in the valve body (1) top fixed connection has the rotary rod (3), the valve body (1) top fixed connection has two limit rods (4), two limit rods (4) top fixed connection has the same connecting seat, screw rod (2) is movably connected with connecting seat, two limit rods (4) side wall movably connected with same positioning plate (5), the positioning plate (5) top surface rotationally connected with cylinder (6), screw rod (2) penetrates cylinder (6), the cylinder (6) side wall is provided with limiting component, the positioning plate (5) side wall left and right symmetrical two locking components are provided with.

2. The flow limiting structure of a regulating valve according to claim 1, wherein: The limiting component includes the through hole being formed in the side wall of the cylinder (6), the plug rod (7) is movably connected in the through hole, one end of the plug rod (7) is fixedly connected with the rotating plate (8), the screw rod (2) side wall is along the axis direction and is formed with a plurality of equidistant insertion holes (18), the other end of the plug rod (7) is matched with the insertion hole (18), the plug rod (7) side wall is provided with the spring (9), and the both ends of the spring (9) are fixedly connected with the cylinder (6) and the rotating plate (8) respectively.

3. The flow limiting structure of a regulating valve according to claim 2, wherein: The through hole side wall is provided with a through groove (11), the plug rod (7) side wall is fixedly connected with the rectangular block (10), the rectangular block (10) is matched with the through groove (11), and the cylinder (6) side wall is provided with a limiting groove (12).

4. The flow limiting structure of a regulating valve according to claim 1, wherein: The cylinder (6) side wall is fixedly connected with the positioning ring (13), the positioning plate (5) side wall is provided with the positioning groove (14), and the positioning ring (13) is rotationally connected with the positioning groove (14).

5. The flow limiting structure of a regulating valve according to claim 1, wherein: The locking component includes the bolt (15) being screwed on the side wall of the positioning plate (5), the limit rod (4) side wall is provided with the guide groove (16), and the bolt (15) is in abutment with the side wall of the guide groove (16).

6. The flow limiting structure of a regulating valve according to claim 1, wherein: The screw rod (2) side wall is provided with the rubber ring (17), and the rubber ring (17) is in concertina folding shape structure.

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