Novel fixed ball valve structure

Abstract

The utility model discloses a novel ball valve structure with a fixed ball, which relates to the field of valves, aims to solve the problems of poor safety and high maintenance cost of an integrated valve in the use process, and comprises a valve body, a ball body is rotatably connected in the valve body, a ball body sealing component is arranged between the ball body and an inner cavity of the valve body, and the ball body sealing component is fixedly connected with the valve body. A lower valve rod seat is arranged below the ball body and detachably installed below the valve body, a valve rod is fixedly connected to the upper portion of the ball body and rotationally connected with an upper valve rod seat, the upper valve rod seat is detachably installed at the upper end of the valve body, and a valve rod sealing assembly is installed between the valve rod and the upper valve rod seat. The upper end of the valve rod is fixedly connected with a manual operator, the manual operator is rotatably connected with a receiving disc, the receiving disc is fixedly connected with the upper valve rod seat, and the valve has the advantages that the upper valve rod seat and the valve body are designed in a split mode, follow-up maintenance work is facilitated, meanwhile, the valve rod can be installed on the upper portion of the valve rod, and the valve rod is effectively prevented from being blown out.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a novel fixed ball valve structure of ball. BACKGROUND

[0002] Ball valve as an important fluid control device, is widely used in petroleum, chemical industry, natural gas and other industrial fields, and its core function is to realize the opening and closing of flow passage through the rotation of ball. The structure of traditional fixed ball valve usually adopts integrated valve body design, that is, the valve body and the upper valve rod seat (valve rod support structure) are integrally cast or processed into shape. Although such design has certain reliability under normal working conditions, under severe working conditions of high pressure, high temperature or frequent opening and closing, the following technical pain points still exist:

[0003] Firstly, when the valve bears high pressure or temperature fluctuation, the medium pressure is easily transmitted to the ball through the valve seat, and then acts on the valve rod, forming an upward axial thrust. The upper valve rod seat of the traditional integrated valve body is rigidly connected with the valve body, lacks effective constraint on the axial displacement of the valve rod, and has the risk of "blowing out" of the valve rod by the medium pressure. Once the valve rod has axial displacement, it will lead to sealing failure, aggravated filler wear, and even cause medium leakage and other safety accidents.

[0004] Secondly, if the upper valve rod seat of the integrated structure is worn or damaged, the valve body needs to be replaced or repaired by complex processing, which has high maintenance cost and long downtime. In addition, the installation of the valve rod usually adopts "downloading type" structure, that is, the valve rod and the ball are assembled at the bottom of the valve body, which requires disassembling the whole valve during online maintenance (such as replacing the filler and the valve rod), and it is difficult to meet the needs of modern industry for rapid repair of equipment. UTILITY MODEL CONTENTS

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a novel fixed ball valve structure, which effectively solves the problems of axial displacement of the valve rod, damage of the valve, and replacement of the valve body after damage of the traditional integrated valve, thereby solving the problems of poor safety and high maintenance cost of the integrated valve during use.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: the utility model discloses a valve body, the ball body is rotatably connected in the valve body, the ball body and the inner chamber of valve body are equipped with ball body sealing assembly, the lower valve rod seat is equipped with below the ball body, the lower valve rod seat is detachably installed below the valve body, the ball body upper fixedly connected with valve rod, the valve rod rotatably connected with upper valve rod seat, the upper valve rod seat is detachably installed on the upper end of valve body, the valve rod with upper valve rod seat between installation has valve rod sealing assembly, the valve rod upper end fixedly connected with manual operator, the manual operator rotatably connected with the dish, the dish with upper valve rod seat fixed connection.

[0007] Preferably, the upper valve rod seat and the lower valve rod seat are both fixedly connected with a gland, a first O-ring and a first gasket are installed on the connecting surface of the gland, and the upper valve rod seat, the lower valve rod seat, the valve body and the gland are fixed by fixed bolts.

[0008] Preferably, the ball body sealing assembly comprises a valve seat sealing ring, the valve seat sealing ring is tightly attached to the periphery of the ball body, a second O-ring, a support ring, a fireproof ring, a fireproof pad seat and a first spring are sequentially arranged outward along the valve seat sealing ring, and the first spring has a force acting on the fireproof pad seat in the direction of the ball body.

[0009] Preferably, an upper and lower bearing is installed between the upper valve rod seat and the valve body, and a thrust washer is arranged between the bottom of the upper valve rod seat and the valve rod.

[0010] Preferably, the valve rod sealing assembly comprises a packing, and a second gasket is sleeved on the valve rod below the packing.

[0011] Preferably, a blowdown and vent valve is arranged between the valve rod and the ball body, and an electrostatic spring and an exhaust hole are arranged in the blowdown and vent valve.

[0012] Preferably, a one-way valve is installed on the ball body on both sides of the valve rod, and a grease injection valve is installed in the valve rod and the one-way valve.

[0013] Preferably, an adjusting gasket is installed between the lower valve rod seat and the ball body.

[0014] Compared with the prior art, the utility model has the following outstanding advantages:

[0015] In the utility model, the upper valve rod seat and the valve body are detachably installed, the upper valve rod seat and the valve body are an independent split structure, the upper valve rod seat and valve body can be realized, the blowout performance of the valve rod is improved, the sealing property of the valve body is guaranteed, and medium leakage is avoided.

[0016] The valve rod sealing assembly in the utility model is respectively located at upper, middle and lower three places of the valve rod, guarantees the sealing effect of the valve rod, avoids the whole valve from leaking, meanwhile, the valve rod sealing assembly plays an auxiliary supporting effect on the stability of the valve rod, guarantees the valve rod to stably act on the ball. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole section structure schematic view of the utility model.

[0018] Figure 2 It is the valve body section schematic view of the utility model.

[0019] Figure 3 It is the upper valve rod seat section schematic view of the utility model.

[0020] Figure 4 It is the valve rod left side valve body section structure schematic view of the utility model.

[0021] Reference signs in the drawing: 1, valve body; 2, ball; 3, ball sealing assembly; 301, valve seat sealing ring; 302, second O-shaped ring; 303, supporting ring; 304, fireproof ring; 305, fireproof pad seat; 306, first spring; 4, lower valve rod seat; 5, valve rod; 6, upper valve rod seat; 7, valve rod sealing assembly; 701, packing; 702, second gasket; 8, manual operator; 9, connecting disc; 10, gland; 11, first O-shaped ring; 12, first gasket; 13, upper and lower bearing; 14, thrust gasket; 15, blowdown and vent valve; 16, electrostatic spring; 17, one-way valve; 18, grease injection valve; 19, adjusting gasket. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, 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 protection scope of the utility model.

[0023] Please refer to the drawings of the utility model Figures 1-4The embodiment is a new type of fixed ball valve structure: the valve body 1 is rotatably connected with the ball 2, the ball 2 and the inner cavity of the valve body 1 are provided with a ball sealing assembly 3, the lower valve rod seat 4 is arranged below the ball 2 and is detachably mounted below the valve body 1, the valve rod 5 is fixedly connected above the ball 2, the upper valve rod seat 6 is rotatably connected with the valve rod 5 and is detachably mounted on the upper end of the valve body 1, the valve rod sealing assembly 7 is mounted between the valve rod 5 and the upper valve rod seat 6, the manual operator 8 is fixedly connected to the upper end of the valve rod 5, the receiving disc 9 is rotatably connected with the manual operator 8 and is fixedly connected with the upper valve rod seat 6.

[0024] The middle part of the valve body 1 is a left-right through channel, the left and right ends of the valve body 1 are provided with flange sleeves, the valve body 1 is fixedly installed in the pipeline system through the flange sleeves, the ball 2 is located in the channel inside the valve body 1, the distance between the ball 2 and the left and right ends of the valve body 1 is equal, the rotation of the ball 2 is driven by the valve rod 5 fixedly connected therewith, the valve rod 5 is located at the upper end of the ball 2, the valve rod 5 is limited by the upper valve rod seat 6, the opposite end of the upper valve rod seat 6 is provided with the lower valve rod seat 4, the lower valve rod seat 4 is located at the lower end of the ball 2, the diameter of the ball 2 is the same as the diameter of the channel of the valve body 1, further to improve the sealing between the ball 2 and the channel, the ball sealing assembly 3 is mounted at the connecting position between the ball 2 and the inner wall of the channel, to improve the sealing effect of the ball 2 on the channel of the valve body 1, at the same time, the valve rod sealing assembly 7 is mounted between the valve rod 5 and the upper valve rod seat 6, to avoid leakage between the valve rod 5 and the upper valve rod seat 6, the valve rod 5 is mounted on the receiving disc 9, the manual operator 8 in the receiving disc 9 can directly act on the valve rod 5, the valve rod 5 is controlled by the manual operator 8, the receiving disc 9 covers the upper end of the upper valve rod seat 6, the receiving disc 9 and the upper valve rod seat 6 are fixedly installed, to avoid the valve rod 5 being blown upward, to ensure the stability between the valve rod 5 and the valve body 1 and the sealing of the whole valve, to avoid leakage or damage of the valve

[0025] The ends of the upper valve rod seat 6 and the lower valve rod seat 4 away from the valve body 1 are sleeved with the gland 10, the upper end of the gland 10 exerts downward force on the upper valve rod seat 6 to fix, the lower end of the gland 10 exerts upward pressure on the lower valve rod seat 4 to fix, to ensure the fixed installation of the upper valve rod seat 6 and the lower valve rod seat 4 on the valve body 1, to avoid the separation of the two from the valve body 1, the upper valve rod seat 6, the lower valve rod seat 4, the valve body 1 and the gland 10 are fixed by the fixed bolts, the fixed bolts are locking members, which can play a good fixing role, at the same time, to ensure the firmness of the fixation, the fixed bolts and the gland 10 can be used in cooperation with the spring pad, the first O-ring 11 and the first gasket 12.

[0026] The ball sealing assembly 3 has two groups, and the two groups of ball sealing assemblies 3 are located on the left and right sides of the ball 2, respectively, and are sequentially provided with a valve seat sealing ring 301, a second O-shaped ring 302, a support ring 303, a fireproof ring 304, a fireproof pad seat 305 and a first spring 306 outward from the center of the ball 2. The second O-shaped ring 302 and the first O-shaped ring 11 are O-shaped rings, and the radial and axial seals are realized through the second O-shaped ring 302 and the fireproof ring 304. At the same time, the first spring 306 has an inward spring force on the fireproof pad seat 305, and the first spring 306 has an inward pre-tightening force on the fireproof ring 304, the support ring 303 and the second O-shaped ring 302 through the fireproof pad seat 305, thereby effectively compensating for the wear of the valve seat, so that the valve seat sealing ring 301 can better adhere to the valve seat, and the connection between the ball 2 and the valve body 1 is air-tight. The fireproof ring 304 and the fireproof pad seat 305 are made of high-temperature-resistant material, the fireproof ring 304 is made of 304 wire + graphite, and the first gasket 12 and the second gasket 702 are metal wound gaskets.

[0027] The upper and lower bearings 13 between the upper valve stem seat 6 and the valve body 1 guide the movement of the valve stem 5, and through the upper and lower bearings 13, the valve stem 5 is stabilized. The connection between the valve stem 5 and the ball 2 is larger than the inner cavity of the upper valve stem seat 6, and the lower end of the upper valve stem seat 6 and the lower end of the valve stem 5 have a thrust gasket 14 to prevent the ball 2 from moving upward.

[0028] The filler 701 in the valve stem sealing assembly 7 is made of graphite material, which has high temperature resistance and fireproof performance. When the second gasket 702 is burned out due to medium fire, the external filler 701 can still play a sealing role. The first O-shaped ring 11 has two on the valve stem 5, which guarantees the radial sealing effect through the filler 701, the two first O-shaped rings 11 and the thrust gasket 14, and guarantees the axial sealing of the upper valve stem seat 6 through the second gasket 702 thrust gasket 14.

[0029] The valve stem 5 is provided with a blowdown vent valve 15 at the lower end, and the exhaust hole of the blowdown vent valve 15 is in communication with the channel. The exhaust hole is provided with an electrostatic spring 16 and a blocking piece. The electrostatic spring 16 presses the blocking piece at the exhaust hole. When the pressure in the channel of the valve body 1 is too high, the exhaust work can be performed. The blowdown vent valve 15 discharges solid impurities, liquid pollutants or gas in the pipeline or container regularly or in an emergency, prevents the accumulation of the solid impurities, liquid pollutants or gas from affecting the normal operation of the system, and avoids the abnormal phenomena such as air blockage and liquid impact in the pipeline, thereby ensuring the fluid transmission efficiency.

[0030] The valve body 1 is provided with two check valves 17, which are symmetrically distributed at the middle part of the valve stem 5. When the valve leaks seriously on the pipeline, the check valves 17 and the grease injection valve 18 inject grease into the valve seat sealing surface of the valve to temporarily and urgently ensure the sealing property of the valve.

[0031] An adjusting gasket 19 is arranged between the lower valve rod seat 4 and the ball 2 to ensure the sealing effect between the ball 2 and the lower valve rod seat 4.

[0032] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for those 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 within the scope of the present application.

Claims

1. A new fixed ball valve construction characterized by: The utility model provides a valve, including valve body (1), the ball (2) is rotatably connected in the valve body (1), the ball (2) and the inner chamber between the valve body (1) are equipped with ball seal assembly (3), the lower valve stem seat (4) is equipped under the ball (2), the lower valve stem seat (4) is detachably installed under the valve body (1), the ball (2) upper fixedly connected with valve stem (5), the valve stem (5) rotatably connected with upper valve stem seat (6), the upper valve stem seat (6) detachably installed on the upper end of valve body (1), the valve stem (5) with the upper valve stem seat (6) between installation has valve stem seal assembly (7), the valve stem (5) upper fixedly connected with manual operator (8), the manual operator (8) rotatably connected with the dish (9), the dish (9) with the upper valve stem seat (6) fixed connection.

2. A new fixed ball valve structure according to claim 1, characterized by: The upper valve stem seat (6) and the lower valve stem seat (4) are fixedly connected with the gland (10), the first O ring (11) and the first gasket (12) are installed on the interface of the gland (10), and the upper valve stem seat (6), the lower valve stem seat (4), the valve body (1) and the gland (10) are fixed by fixed bolts.

3. A new fixed ball valve structure according to claim 1, characterized in that: The ball seal assembly (3) includes a valve seat sealing ring (301), the valve seat sealing ring (301) is tightly attached to the periphery of the ball (2), and a second O ring (302), a support ring (303), a fireproof ring (304), a fireproof pad (305) and a first spring (306) are arranged outwardly in sequence along the valve seat sealing ring (301), the first spring (306) has a force to the fireproof pad (305) in the direction of the ball (2).

4. A new fixed ball valve structure according to claim 1, characterized in that: The upper valve stem seat (6) and the valve body (1) are installed with upper and lower bearings (13), and the bottom of the upper valve stem seat (6) and the valve stem (5) are provided with a thrust washer (14).

5. A new fixed ball valve structure according to claim 1 or 4, characterized in that: The valve stem seal assembly (7) includes a packing (701), and a second gasket (702) is sleeved on the valve stem (5) below the packing (701).

6. A new fixed ball valve structure according to claim 1, characterized by: The valve stem (5) and the ball (2) are provided with a blowdown vent valve (15), and the blowdown vent valve (15) is provided with an electrostatic spring (16) and an exhaust hole.

7. A new fixed ball valve structure according to claim 6, characterized by: The ball (2) on both sides of the valve stem (5) is provided with a check valve (17), and the check valve (17) and the valve stem (5) are provided with a grease injection valve (18).

8. A new fixed ball valve structure according to claim 1, characterized by: The lower valve stem seat (4) and the ball (2) are provided with an adjusting gasket (19).

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