Opening limiting device of hydraulic control valve

Abstract

The utility model relates to the technical field of valve devices, in particular to a hydraulic control valve opening limiting device which comprises a limiting cylinder barrel, a valve seat, a connecting piece, an upper sliding rod, a lower sliding rod, a spring, a packaging piece, a connecting nut, a hexagonal cylinder, a plugging head, a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. During use, after the valve is at a specified opening degree, the valve pressing plate abuts against the lower sliding rod to jack the lower sliding rod upwards, so that the valve seat moves upwards in the thickening part to be pushed up to be opened, water enters a water path to enable the valve not to rise continuously and maintain the corresponding opening degree, and when the valve is closed, the sliding rod is released, and the valve is closed. The valve seat falls to the original position again under the elastic force effect of the spring, the upper sliding rod and the lower sliding rod are of a double-guide structure, the sliding rods move in the limiting device to guide the valve clack to form lifting guide movement, the reliability of the limiting device is improved, the performance of the valve is improved, and the service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve device technical field, concretely relates to hydraulic control valve opening limiting device. BACKGROUND

[0002] Hydraulic control valve as a kind of equipment widely used in fluid control system, with the function of adjusting flow, pressure, liquid level etc Parameter, it has wide application in petroleum, chemical industry, electric power, metallurgy, water conservancy etc. Field, the opening limiting device of hydraulic control valve is its important component, it can make valve flap to be more stable opening and closing, and adjust the maximum opening of valve flap.

[0003] At present, in the existing hydraulic control valve, the up and down movement of valve rod assembly is controlled by certain control mode, to realize the control of valve opening and closing. Common control mode has mechanical mode and electric control mode, mechanical mode can only control the opening and closing of valve, cannot limit the size of valve opening, and electric control mode can control the size of valve opening, but the manufacturing cost is high, and the structure is complex.

[0004] Based on this, the utility model designs hydraulic control valve opening limiting device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in prior art, and provides hydraulic control valve opening limiting device.

[0006] To achieve the above object, the utility model provides the following technical scheme: hydraulic control valve opening limiting device, including limiting cylinder, valve seat, connecting piece, upper sliding rod, lower sliding rod, spring, encapsulating piece, connecting nut, hexagonal column, plugging head, first sealing ring, second sealing ring, third sealing ring and fourth sealing ring, the thickening portion is set on the limiting cylinder, the thickening portion side is equipped with water inlet, the inside of thickening portion is provided with valve seat, the upper end of limiting cylinder is connected with connecting piece, the lower end of limiting cylinder is provided with encapsulating piece, the encapsulating piece is fixedly connected with limiting cylinder by connecting nut, the upper end of connecting piece is provided with hexagonal column, the top of hexagonal column is provided with plugging head.

[0007] As a preferred technical scheme of the utility model, the upper and lower ends of the valve seat are provided with mounting holes, the upper end of the valve seat is fixedly connected with the upper sliding rod in the mounting hole, the lower end of the valve seat is fixedly connected with the lower sliding rod in the mounting hole, and the valve seat is provided with sealing ring at the connection of the upper sliding rod and the lower sliding rod.

[0008] As a preferred technical scheme of the utility model, the upper end of the packaging piece is matched and connected inside the lower end of the limiting cylinder, and the connecting place between the limiting cylinder and the packaging piece is provided with a first sealing ring.

[0009] As a preferred technical scheme of the utility model, the lower end of the valve seat is matched and connected with the passage of the packaging piece, and a second sealing ring is arranged between the piston and the packaging piece.

[0010] As a preferred technical scheme of the utility model, a rod hole is formed in the center of the connecting piece, and the upper sliding rod is slidably arranged inside the rod hole.

[0011] As a preferred technical scheme of the utility model, the lower end of the connecting piece is matched and connected inside the upper end of the limiting cylinder, and a third sealing ring is arranged at the connecting place between the limiting cylinder and the connecting piece.

[0012] As a preferred technical scheme of the utility model, the lower end of the hexagonal column is matched and connected with the upper end of the connecting piece, and a fourth sealing ring is arranged at the connecting place between the connecting piece and the hexagonal column.

[0013] As a preferred technical scheme of the utility model, the through groove formed in the inside of the hexagonal column is communicated with the rod hole of the connecting piece, and the plugging head is plugged and connected in the through hole at the top of the hexagonal column.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1、The utility model discloses when using, when the valve is at specified opening, the valve pressing plate supports the lower sliding rod and lifts it upward, so that the valve seat is moved up in the thickening part and is opened, and the water inlet of the waterway makes the valve not continue to rise, maintains the opening of corresponding, when the valve is closed, the sliding rod releases, under the action of the spring elasticity makes the valve seat fall to the original position again, and through the double guide structure of the upper sliding rod and the lower sliding rod, the lifting guide movement of the valve flap is guided by the movement of the sliding rod in the limiting device, the reliability of the limiting device is improved, the performance and service life of the valve are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, are used to explain the utility model together with the embodiments of the utility model, and do not constitute the limitation to the utility model.

[0017] Figure 1 It is the whole front view structural schematic diagram of the utility model;

[0018] Figure 2 It is the whole rear view structural schematic diagram of the utility model;

[0019] Figure 3 It is the whole side view structure schematic diagram of the utility model;

[0020] Figure 4 It is the whole cross section structure schematic diagram of the utility model;

[0021] Figure 5 It is the cylinder local enlarged cross section structure schematic diagram of the utility model;

[0022] Figure 6 It is the connecting piece local enlarged cross section structure schematic diagram of the utility model.

[0023] In the drawing: 1, limit cylinder; 101, thickening part; 102, water inlet; 2, valve seat; 201, mounting hole; 202, sealing ring; 3, connecting piece; 301, rod hole; 4, upper sliding rod; 5, lower sliding rod; 6, spring; 7, encapsulating piece; 8, connecting nut; 9, hexagonal column; 10, plugging head; 11, first sealing ring; 12, second sealing ring; 13, third sealing ring; 14, fourth sealing ring. DETAILED DESCRIPTION

[0024] The utility model will be described below in conjunction with the drawings in the embodiments of the utility model Figures 1-6 The technical solutions in the embodiments of the utility model are clearly and completely described, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] EMBODIMENT

[0026] Please refer to Figures 1-6 The utility model provides the following technical scheme: water power control valve opening limiting device, including limit cylinder 1, valve seat 2, connecting piece 3, upper sliding rod 4, lower sliding rod 5, spring 6, encapsulating piece 7, connecting nut 8, hexagonal column 9, plugging head 10, first sealing ring 11, second sealing ring 12, third sealing ring 13 and fourth sealing ring 14, be provided with thickening part 101 on limit cylinder 1, the water inlet 102 is set up in one side of thickening part 101, the inside of thickening part 101 is provided with valve seat 2, the upper end of limit cylinder 1 is connected with connecting piece 3, the lower end of limit cylinder 1 is provided with encapsulating piece 7, encapsulating piece 7 is fixedly connected with limit cylinder 1 through connecting nut 8, upper sliding rod 4 and lower sliding rod 5 are fixedly connected respectively on the upper end and lower end of valve seat 2, spring 6 is set up between valve seat 2 and connecting piece 3, the upper end of connecting piece 3 is provided with hexagonal column 9, and the top of hexagonal column 9 is provided with plugging head 10.

[0027] The upper and lower ends of the valve seat 2 are provided with mounting holes 201, the upper end of the valve seat 2 is fixedly connected with the upper sliding rod 4 in the mounting hole 201, and the lower end of the valve seat 2 is fixedly connected with the lower sliding rod 5 in the mounting hole 201, and the connection parts of the valve seat 2, the upper sliding rod 4 and the lower sliding rod 5 are provided with sealing rings 202.

[0028] The upper end of the packaging piece 7 is matched and connected in the inner part of the lower end of the limiting cylinder 1, and the connection part of the limiting cylinder 1 and the packaging piece 7 is provided with a first sealing ring 11.

[0029] The lower end of the valve seat 2 is connected with the passage of the packaging piece 7, and the second sealing ring 12 is arranged between the piston and the packaging piece 7.

[0030] The limiting structure composed of the limiting cylinder 1, the valve seat 2, the connecting piece 3, the upper sliding rod 4, the lower sliding rod 5, the spring 6, the packaging piece 7 and the connecting nut 8 can limit the size of the valve opening, has good practicability, and the reliability of the limiting device is improved through the design of the double guide rods, so as to improve the performance and service life of the valve.

[0031] Please refer to Figure 3 , Figure 4 and Figure 6 , the center of the connecting piece 3 is provided with a rod hole 301, and the upper sliding rod 4 is slidably arranged in the inner part of the rod hole 301.

[0032] The lower end of the connecting piece 3 is matched and connected in the inner part of the upper end of the limiting cylinder 1, and the third sealing ring 13 is arranged between the connecting piece 3 and the limiting cylinder 1.

[0033] The lower end of the hexagonal column 9 is matched and connected with the upper end of the connecting piece 3, and the fourth sealing ring 14 is arranged between the connecting piece 3 and the hexagonal column 9.

[0034] The through groove in the inner part of the hexagonal column 9 is communicated with the rod hole 301 of the connecting piece 3, and the blocking head 10 is connected in the through hole at the top of the hexagonal column 9.

[0035] The connecting piece 3 arranged between the limiting cylinder 1 and the hexagonal column 9 can guide and limit the upper sliding rod 4, and the third sealing ring 13 and the fourth sealing ring 14 arranged between the connections can ensure the sealing property of the connection.

[0036] The working principle and use flow of the utility model are as follows: when the valve is opened, the pressing plate is moved, the pressing plate is pressed against the lower sliding rod 5 to lift it upward, the lower sliding rod 5 is used to lift the valve seat 2 in the thickening part 101 to be opened, when the valve opening reaches the specified opening, the water inlet 102 is used to make the valve not continue to rise, the corresponding opening is maintained, when the valve is closed, the pressing plate is moved downward, the lower sliding rod 5 loses the pressing force, the valve seat 2 is made to fall to the original position under the rebound force of the spring 6, so that the purpose of the valve opening limiting is realized, the reliability of the limiting device is improved through the design of the double-guide structure of the upper sliding rod 4 and the lower sliding rod 5, so that the performance and service life of the valve are improved.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. Hydraulic control valve opening limiting device, comprising limiting cylinder (1), valve seat (2), connecting piece (3), upper sliding rod (4), lower sliding rod (5), spring (6), encapsulation (7), connecting nut (8), hexagonal column (9), plugging head (10), first sealing ring (11), second sealing ring (12), third sealing ring (13) and fourth sealing ring (14), characterized in that: The limiting cylinder (1) is provided with a thickening part (101), one side of the thickening part (101) is provided with a water inlet (102), the inside of the thickening part (101) is provided with a valve seat (2), the upper end of the limiting cylinder (1) is connected with a connecting piece (3), the lower end of the limiting cylinder (1) is provided with an encapsulating piece (7), the encapsulating piece (7) is fixedly connected with the limiting cylinder (1) through a connecting nut (8), the upper and lower ends of the valve seat (2) are fixedly connected with an upper sliding rod (4) and a lower sliding rod (5) respectively, the valve seat (2) and the connecting piece (3) are provided with a spring (6) therebetween, the upper end of the connecting piece (3) is provided with a hexagonal column (9), and the top end of the hexagonal column (9) is provided with a plugging head (10).

2. The hydraulic control valve stroke limiter device of claim 1, wherein: The upper and lower ends of the valve seat (2) are provided with mounting holes (201), the mounting hole (201) in the upper end of the valve seat (2) is fixedly connected with the upper sliding rod (4), and the mounting hole (201) in the lower end of the valve seat (2) is fixedly connected with the lower sliding rod (5).

3. The hydraulic control valve stroke limiter device of claim 1, wherein: The upper end of the encapsulating piece (7) is matched and connected in the inside of the lower end of the limiting cylinder (1), and the connecting position of the limiting cylinder (1) and the encapsulating piece (7) is provided with a first sealing ring (11).

4. The hydraulic control valve stroke limiter device of claim 1, wherein: The lower end of the valve seat (2) is provided with a piston which is in sealing connection with the encapsulating piece (7), and a second sealing ring (12) is arranged between the piston and the encapsulating piece (7).

5. The hydraulic control valve stroke limiter device of claim 1, wherein: The center of the connecting piece (3) is provided with a rod hole (301), and the upper sliding rod (4) is slidingly arranged in the inside of the rod hole (301).

6. The hydraulic control valve stroke limiter of claim 1, wherein: The lower end of the connecting piece (3) is matched and connected in the inside of the upper end of the limiting cylinder (1), and the connecting position of the limiting cylinder (1) and the connecting piece (3) is provided with a third sealing ring (13).

7. The hydraulic control valve stroke limiter of claim 1, wherein: The lower end of the hexagonal column (9) is matched and connected with the upper end of the connecting piece (3), and the connecting position of the connecting piece (3) and the hexagonal column (9) is provided with a fourth sealing ring (14).

8. The hydraulic control valve stroke limiter of claim 1, wherein: The through groove in the inside of the hexagonal column (9) is in communication with the rod hole (301) of the connecting piece (3), and the plugging head (10) is in sealing connection in the through hole in the top of the hexagonal column (9).

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