Adjusting ball valve

Abstract

The utility model discloses an adjusting ball valve which comprises a valve body, a transverse flow channel is formed in the valve body, a valve element for opening and closing the transverse flow channel is arranged in the valve body, valve seats inserted into the valve body are arranged on the left side and the right side of the valve element respectively, and sealing rings matched with the spherical surface of the valve element are fixed to the two valve seats respectively. The side ends of the two valve seats are provided with first compression springs driving the two valve seats to press towards the spherical surface direction of the valve element, the valve body is provided with a valve rod matched with the valve element, and the top end of the valve body is provided with a valve element rotation angle adjusting device. A breaking rod is fixed at the top end of the valve rod, an angle dial is arranged on the top surface of the shell, and a pointer matched with the angle dial is fixed on the breaking rod; and a switch for controlling each electric telescopic cylinder to open and close is fixed on the pulling rod. The angle of the locking valve core can be accurately adjusted, so that the medium flow is accurately adjusted and controlled, and the valve is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a ball valve, and especially to a regulating ball valve. Background Art

[0002] A ball valve is a valve in which the closing member (ball) is driven by a valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids. When the traditional lever-operated ball valve is used to open and close a pipeline, it can only be fully opened or fully closed. When adjusting the flow rate (i.e., the valve core is not in the fully open state, as shown in Figure 8 ), since the valve stem is not locked, the medium pressure will impact the valve core, causing the valve core to be forced to open fully, and thus the flow rate cannot be adjusted.

[0003] Chinese Utility Model Patent CN 118482199 A discloses a low-torque ball valve. The ball valve includes a valve body, a spherical valve core is movably arranged inside the valve body, and threaded ends are respectively provided at both ends of the valve body. A valve stem protection device is provided at the upper end inside the valve body to prevent the valve stem from wearing and to increase the seal to avoid water overflow. The valve stem protection device includes a valve stem, the valve stem is movably arranged inside the upper end of the valve body, the lower end of the valve stem is fixedly connected to the upper end of the spherical valve core, an H-shaped groove is provided on the outer surface of the lower end of the valve stem, and a rotating disc is fixedly provided at the upper end of the valve stem. A ball valve anti-wear device for protecting the spherical valve core is provided inside the valve body to prevent the outer surface of the spherical valve core from rubbing against the port of the threaded end and causing wear. When using this ball valve to rotate a small angle to adjust the medium flow rate, the valve core cannot be kept stationary, and thus the medium flow rate cannot be adjusted. Content of the Utility Model

[0004] The utility model aims to solve the above-mentioned drawbacks of the prior art and provides a regulating ball valve capable of adjusting different flow rates of the medium, meeting the requirements of precise adjustment of the medium flow rate and adapting to different sizes of flow rate adjustments.

[0005] The technical solution adopted by the present utility model to solve its technical problems: This regulating ball valve includes a valve body. A transverse flow channel is opened on the valve body. A valve core for opening and closing the transverse flow channel is provided inside the valve body. Valve seats inserted at the valve body are provided on both the left and right sides of the valve core. Sealing rings that fit on the spherical surface of the valve core are fixed on both valve seats. First compression springs for driving the two valve seats to press towards the spherical surface of the valve core are installed at the side ends of the two valve seats. A valve stem that cooperates with the valve core is installed on the valve body. A valve core rotation angle adjustment device is installed at the top end of the valve body; The valve core rotation angle adjustment device includes a housing fixed at the top end of the valve body. A disc is fixed on the valve stem. A group of electric telescopic cylinders evenly distributed along the center of the housing are fixed on the housing. A group of elliptical jacks with a quantity and position matching that of the electric telescopic cylinders are opened on the housing. A top block is inserted into each elliptical jack. A first jack and a second jack are opened in the top block. The cross-section of the first jack is larger than that of the second jack. An insertion block is inserted at the first jack. A second compression spring is installed between the insertion block and the end face of the first jack. A connecting rod that is inserted into the second jack and fixed together with the insertion block is fixed on the piston rod of the electric telescopic cylinder. The outer end face of the top block is arc-shaped and matches the outer contour of the disc; A lever is fixed at the top end of the valve stem. An angle scale is provided on the top surface of the housing. A pointer that mates with the angle scale is fixed on the lever; A switch for controlling the opening and closing of each electric telescopic cylinder is fixed on the lever. The function of the transverse flow channel here is to allow the medium to pass through; The function of the valve core here is to open and close the transverse flow channel; The functions of the valve seat, the sealing ring, and the first compression spring here are to be able to seal the valve core, and when the sealing ring is worn after long-term use, to be able to compensate for the position of the sealing ring; The function of the lever here is to be able to open and close the ball valve with less effort; The function of the valve core rotation angle adjustment device here is to be able to lock the angle of the valve core rotating to adjust the flow rate, avoiding the valve core from rotating due to the impact of the medium and enabling the valve core to accurately adjust the medium flow rate; The working principle of the valve core rotation angle adjustment device is as follows: When the valve core is rotated using the lever and the angle of the valve core for adjusting the flow rate is adjusted, the switch is pressed, so that each electric telescopic cylinder is started. Then the piston rod on the electric telescopic cylinder moves and drives the top block to move together. Thus, the top block presses on the disc. At this time, the piston rod on the electric telescopic cylinder continues to move. Thus, the second compression spring is compressed by the insertion block to generate an elastic force. Furthermore, the top block is elastically pressed against the outer contour surface of the disc, thereby pressing the disc to prevent rotation operation. Furthermore, the rotation of the valve core can be locked, so that the valve core can be locked at a specified angle to adjust the medium flow rate; The functions of the angle scale and the pointer here are to be able to accurately display the rotation angle of the valve core, so as to more accurately control the adjusted flow rate; The electric telescopic cylinder is an existing product on the market, and products of companies such as Thomson Company and Dongguan Minghui Automation Equipment Co., Ltd. can be selected.

[0006] Further improvement: A pier is fixed at the bottom of the valve body. A first groove and a second groove are formed at the bottom of the spool. A thrust bearing is installed at the top of the pier. The end face of the first groove is placed on the top of the thrust bearing. A first bearing is installed at the second groove. The inner ring of the first bearing is sleeved and placed on the pier. A second bearing sleeved on the valve stem is installed at the housing. The functions of the pier, the first groove, the second groove, the thrust bearing, the first bearing, and the second bearing are to longitudinally and laterally support the spool. When the strong medium pressure acts on the spool, the first bearing and the second bearing can resist the lateral force. Through the functions of the thrust bearing, the first bearing, and the second bearing, the spool will not be like a traditional ball valve, where the gravity of the spool and the lateral pressure of the medium act on the sealing ring on the compressed side. Thus, not only is the sealing ring more wear-resistant, with a small wear amount and a longer service life, but also the rotation and opening / closing of the spool are more effortless.

[0007] Further improvement: An O-ring seal is installed between the valve seat and the valve body. A dovetail groove is formed on the valve body. A dovetail block fixed to the valve seat is inserted and matched with the dovetail groove. Each first compression spring is located outside the O-ring seal, that is, the first compression spring is farther from the transverse flow channel than the O-ring seal. The functions of the O-ring seal, the dovetail groove, the dovetail block, and each first compression spring being located outside the O-ring seal are to prevent the medium from coming into contact with the first compression spring and being prone to corroding the first compression spring, thus avoiding the situation where the first compression spring is prone to failure and needs to be frequently replaced.

[0008] Further improvement: A first self-lubricating layer is provided on the mating surface of the valve body and the valve seat. The function of the first self-lubricating layer is to make the movement of the valve seat have extremely small frictional resistance and also avoid the situation of jamming and not moving. Here, the first self-lubricating layer is made of tin bronze material.

[0009] Further improvement: A second self-lubricating layer is provided on the surface of the elliptical jack. The function of the second self-lubricating layer is to make the movement of the top block have extremely small frictional resistance and also avoid the situation of jamming. Here, the second self-lubricating layer is made of tin bronze material.

[0010] Further improvement: Knurling is provided on the outer contour and the arc-shaped surface of the disc. The function of the knurling is to increase the frictional force. Thus, after the rotation of the spool angle is completed, the disc can be locked and will not be slightly rotated by the medium at all.

[0011] Further improvement: The valve body includes a middle valve block, a left valve block, and a right valve block. The left valve block and the right valve block are fixed to the middle valve block through fasteners. The functions of the valve body including the middle valve block, the left valve block, and the right valve block are to facilitate the installation of the spool and also enable the valve body not to be made of castings, thus having a low cost and being environmentally friendly.

[0012] The beneficial effects of the present utility model are:

[0013] 1). Ability to accurately adjust the locking valve core angle, thereby accurately adjusting the control medium flow;

[0014] 2) It can support the valve core longitudinally and transversely, which not only saves effort in opening and closing the valve core, but also prolongs the service life of the sealing ring, does not require frequent maintenance, and reduces the cost of use;

[0015] 3) It can prevent the first compression spring from contacting with the medium, thereby preventing the first compression spring from being easily corroded and failing, thereby greatly improving the service life of the first compression spring, eliminating the need to frequently replace the first compression spring, and thus reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a top view schematic diagram of the utility model;

[0018] Figure 3 for Figure 1 A local enlarged view of area A;

[0019] Figure 4 for Figure 1 A local enlarged view of area B;

[0020] Figure 5 for Figure 1 A local enlarged view of the C region;

[0021] Figure 6 It is a structural schematic diagram of the top block area in the utility model;

[0022] Figure 7 This is a flow chart of the working principle of the top block pressing on the outer contour of the disc in the utility model;

[0023] Figure 8 This is a state diagram of the utility model during flow regulation.

[0024] Description of reference numerals: valve body 1, middle valve block 1a, left valve block 1b, right valve block 1c, transverse flow passage 1-1, valve core 2, first groove 2-1, second groove 2-2, valve seat 3, dovetail block 3-1, sealing ring 4, first compression spring 5, valve rod 6, valve core rotation angle adjustment device 7, housing 7-1, elliptical jack 7-1a, second self-lubricating layer 7a-1a, angle scale 7-1b, disc 7-2, electric telescopic cylinder 7-3, top block 7-4, first jack 7-4a, second jack 7-4b, arc-shaped 7-4c, insert block 7-5, second compression spring 7-6, connecting rod 7-7, lever 8, pointer 8-1, switch 9, pier 10, thrust bearing 11, first bearing 12, second bearing 13, O-ring 14, first self-lubricating layer 15, knurling 16. Detailed implementation

[0025] The present utility model will be further described below in conjunction with the accompanying drawings:

[0026] Referring to the accompanying drawings: This regulating ball valve includes a valve body 1, a transverse flow passage 1-1 is provided on the valve body 1, a valve core 2 for opening and closing the transverse flow passage 1-1 is provided in the valve body 1, valve seats 3 inserted at the left and right sides of the valve core 2 are provided at the valve body 1, sealing rings 4 matching the spherical surface of the valve core 2 are fixed on both valve seats 3, first compression springs 5 for driving the two valve seats 3 to press towards the spherical surface of the valve core 2 are installed at the side ends of the two valve seats 3, a valve rod 6 cooperating with the valve core 2 is installed on the valve body 1, and a valve core rotation angle adjustment device 7 is installed at the top end of the valve body 1; the valve core rotation angle adjustment device 7 includes a housing 7-1 fixed at the top end of the valve body 1, a disc 7-2 is fixed on the valve rod 6, a group of electric telescopic cylinders 7-3 evenly arranged along the center of the housing 7-1 are fixed on the housing 7-1, a group of elliptical jacks 7-1a with the same number and position matching the electric telescopic cylinders 7-3 are provided on the housing 7-1, a top block 7-4 is inserted in each elliptical jack 7-1a, a first jack 7-4a and a second jack 7-4b are provided in the top block 7-4, the cross-section of the first jack 7-4a is larger than that of the second jack 7-4b, an insert block 7-5 is inserted at the first jack 7-4a, a second compression spring 7-6 is installed between the insert block 7-5 and the end face of the first jack 7-4a, a connecting rod 7-7 inserted in the second jack 7-4b and fixed together with the insert block 7-5 is fixed on the telescopic rod of the electric telescopic cylinder 7-3, and the outer end face of the top block 7-4 is arc-shaped 7-4c matching the outer contour of the disc 7-2; a lever 8 is fixed at the top end of the valve rod 6, an angle scale 7-1b is provided on the top surface of the housing 7-1, and a pointer 8-1 paired with the angle scale 7-1b is fixed on the lever 8; a switch 9 for controlling the opening and closing of each electric telescopic cylinder 7-3 is fixed on the lever 8.

[0027] A pier 10 is fixed to the bottom of the valve body 1. A first groove 2-1 and a second groove 2-2 are formed at the bottom of the valve core 2. A thrust bearing 11 is installed at the top of the pier 10. The end face of the first groove 2-1 is placed on the top of the thrust bearing 11. A first bearing 12 is installed at the second groove 2-2. The inner ring of the first bearing 12 is sleeved and placed on the pier 10. A second bearing 13 sleeved on the valve stem 6 is installed at the housing 7-1.

[0028] An O-ring seal 14 is installed between the valve seat 3 and the valve body 1. A dovetail groove 1-2 is formed on the valve body 1. A dovetail block 3-1 which is in plug-in fit with the dovetail groove 1-2 is fixed on the valve seat 3. Each first compression spring 5 is located outside the O-ring seal 14.

[0029] First self-lubricating layers 15 are provided on the mating surfaces of the valve body 1 and the valve seat 3.

[0030] A second self-lubricating layer 7a-1a is provided on the surface of the elliptical jack 7-1a.

[0031] Knurling 16 is provided on the outer contour of the disc 7-2 and the surface of the circular arc 7-4c.

[0032] The valve body 1 includes a middle valve block 1a, a left valve block 1b and a right valve block 1c. The left valve block 1b and the right valve block 1c are fixed to the middle valve block 1a through fasteners.

[0033] The working principle of the present utility model: When it is necessary to adjust the medium flow rate by rotating the characteristic angle of the valve core on the ball valve, only need to drive the lever 8 to rotate. Thus, the lever 8 drives the valve stem 6 to rotate. Thus, the valve stem 6 drives the valve core 2 to rotate. The angle that the valve core 2 needs to rotate is determined by the angle scale 7-1b corresponding to the pointer 8-1. After determining the angle for adjusting the medium flow rate, press the switch 9. Thus, each electric telescopic cylinder 7-3 is started. Thus, the piston rod on the electric telescopic cylinder 7-3 moves and drives the top block 7-4 to move together. Thus, the top block 7-4 presses on the disc 7-2. At this time, the piston rod on the electric telescopic cylinder 7-3 continues to move. Thus, the second compression spring 7-6 is compressed by the plug 7-5 to generate an elastic force. Furthermore, the top block 7-4 is elastically pressed against the outer contour surface of the disc 7-2. Thus, the disc 7-2 is pressed tightly to prevent the valve core 2 from rotating. Furthermore, the rotation of the valve core 2 can be locked (as Figure 7 shown), so that the valve core 2 can be locked at a specified angle to adjust the medium flow rate (as Figure 8 shown); The present utility model can accurately adjust and lock the angle of the valve core, so as to accurately adjust and control the medium flow rate, and is worthy of popularization and application.

[0034] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. A regulating ball valve, comprising a valve body (1), wherein the valve body (1) is provided with a transverse flow channel (1-1), wherein: The valve body (1) is provided with a valve core (2) for opening and closing the transverse flow channel (1-1), the left and right sides of the valve core (2) are provided with valve seats (3) plugged into the valve body (1), the two valve seats (3) are fixed with sealing rings (4) matched with the spherical surface of the valve core (2), the side ends of the two valve seats (3) are installed with first compression springs (5) for driving the two valve seats (3) to press toward the spherical surface of the valve core (2), the valve body (1) is provided with a valve stem (6) matched with the valve core (2), and the top of the valve body (1) is provided with a valve core rotation angle adjustment device (7); The valve core rotation angle adjustment device (7) comprises a housing (7-1) fixed to the top end of the valve body (1), a disc (7-2) fixed to the valve stem (6), a group of electric telescopic cylinders (7-3) evenly distributed along the center of the housing (7-1) fixed to the housing (7-1), a group of elliptical plug holes (7-1a) whose number and position match the electric telescopic cylinders (7-3) are opened on the housing (7-1), a top block (7-4) is inserted into each of the elliptical plug holes (7-1a), and a first plug hole (7-4a) and a second plug hole (7-4a) are opened in the top block (7-4). 7-4b), the cross section of the first plug hole (7-4a) is larger than the cross section of the second plug hole (7-4b), an insert block (7-5) is inserted into the first plug hole (7-4a), a second compression spring (7-6) is installed between the insert block (7-5) and the end surface of the first plug hole (7-4a), a connecting rod (7-7) inserted into the second plug hole (7-4b) and fixed to the insert block (7-5) is fixed on the telescopic rod of the electric telescopic cylinder (7-3), and the outer end surface of the top block (7-4) is in an arc shape (7-4c) matching the outer contour of the disk (7-2); A bend lever (8) is fixed to the top end of the valve stem (6); an angle dial (7-1b) is provided on the top surface of the housing (7-1); a pointer (8-1) matched with the angle dial (7-1b) is fixed to the bend lever (8); and a switch (9) for controlling the opening and closing of each electric telescopic cylinder (7-3) is fixed to the bend lever (8).

2. A regulating ball valve according to claim 1, characterized in that: A pier (10) is fixed at the bottom of the valve body (1), a first groove (2-1) and a second groove (2-2) are opened at the bottom of the valve core (2), a thrust bearing (11) is installed at the top of the pier (10), the end surface of the first groove (2-1) is placed on the top of the thrust bearing (11), a first bearing (12) is installed at the second groove (2-2), the inner ring of the first bearing (12) is sleeved and placed on the pier (10), and a second bearing (13) sleeved on the valve stem (6) is installed at the housing (7-1).

3. The regulating ball valve according to claim 1, characterized in that: An O-ring (14) is installed between the valve seat (3) and the valve body (1); a dovetail groove (1-2) is provided on the valve body (1); a dovetail block (3-1) pluggably engaged with the dovetail groove (1-2) is fixed on the valve seat (3); and each of the first compression springs (5) is located outside the O-ring (14).

4. A regulating ball valve according to claim 3, characterized in that: The matching surfaces of the valve body (1) and the valve seat (3) are both provided with a first self-lubricating layer (15).

5. The regulating ball valve according to claim 1, characterized in that: The surface of the elliptical insertion hole (7-1a) is provided with a second self-lubricating layer (7a-1a).

6. The regulating ball valve according to claim 1, characterized in that: The outer contour of the disk (7-2) and the arc-shaped surface (7-4c) are both provided with knurling (16).

7. The regulating ball valve according to claim 1, characterized in that: The valve body (1) comprises a middle valve block (1a), a left valve block (1b) and a right valve block (1c); the left valve block (1b) and the right valve block (1c) are fixed to the middle valve block (1a) by fasteners.

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