Anti-misoperation fixed ball valve

Abstract

The utility model discloses an anti-misoperation fixed ball valve which comprises a valve body, a transverse flow channel and a longitudinal channel are formed in the valve body, a valve element is installed on the valve body, valve seats are arranged on the left side and the right side of the valve element respectively, and sealing rings are installed on the two valve seats respectively. The two valve seats are each provided with a set of first compression springs which are evenly distributed along the centers of the valve seats and enable the sealing ring to press the sealing ring towards the spherical face of the valve element, a valve rod where the valve element rotates is installed on the valve body, a rotating block located at the upper end of the top face of the valve body is fixed to the valve rod, and a locking piece is installed on the rotating block. The top surface of the valve body is a plane and is provided with a pair of spherical concave holes which are arranged at an angle of 90 degrees, one spherical concave hole is at a valve core full-open position, the other spherical concave hole is at a valve core full-closed position, and the bottom end of the ejector rod is matched with any spherical concave hole; a breaking rod is fixed at the top end of the valve rod. The ball valve can be subjected to misoperation control, risks are avoided, and the ball valve is worthy of application and popularization.

Description

Technical Field

[0001] The utility model relates to a ball valve, in particular to a fixed ball valve, and more particularly to a mis-operation-proof fixed ball valve. Background Art

[0002] The anti-misoperation ball valve is a specially designed valve, which is mainly used to prevent leakage or other safety problems caused by misoperation during operation. This valve is usually used in the petroleum, chemical, natural gas, pharmaceutical and other industries, which have extremely high requirements for the safety and reliability of valves. Traditionally, the anti-misoperation ball valve uses a clamp to clamp the lever to limit the rotation of the valve stem to prevent misoperation. However, since this clamping form adopts an open limiting method, people (such as children who are not aware of the danger and non-staff who do not understand the operation) will also release the clamp from the restraint on the lever when pressing it, so that the lever can operate the ball valve, which poses a great safety hazard.

[0003] Chinese utility model patent CN 220016287 U discloses a ball valve with anti-misoperation function, which includes a ball valve body, a valve hand body rotatably connected to the top of the ball valve body, a mounting block fixedly connected to one end of the valve pipe top of the ball valve body, a valve hand pin block is provided on the top of the mounting block, the valve hand pin block is used to limit the valve hand body, a slot is provided on the top of the mounting block, the valve hand pin block is slidably connected to the slot, a first limiting groove is provided in the middle of one side of the valve hand pin block, a second limiting groove is provided at the bottom of the valve hand pin block away from the first limiting groove, and a limiting component is symmetrically provided inside the mounting block, and the limiting component is used to limit the first limiting groove and the second limiting groove respectively. The valve hand pin block of the ball valve can be pressed down, so that the valve hand pin block is free from the restriction on the valve hand body, thereby causing misoperation, which has great safety hazards. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide an anti-misoperation fixed ball valve capable of preventing misoperation, thereby meeting the requirements that the ball valve can prevent misoperation and the sealing ring has a long service life and low maintenance cost.

[0005] The utility model adopts a technical solution to solve the technical problem: the anti-misoperation fixed ball valve comprises a valve body, a transverse flow channel and a longitudinal channel connected to the transverse flow channel are opened on the valve body, a valve core for opening and closing the transverse flow channel is installed on the valve body, valve seats plugged into the valve body are arranged on the left and right sides of the valve core, sealing rings are installed on the two valve seats, a group of first compression springs evenly distributed along the center of the valve seat and pressing the sealing ring toward the spherical surface of the valve core are installed on the two valve seats, a valve stem for rotating the valve core is installed on the valve body, a rotary block located at the upper end of the top surface of the valve body is fixed on the valve stem, and a locking member is installed on the rotary block; the locking member comprises a first plug hole and a second plug hole opened on the rotary block, the cross section of the second plug hole is larger than the cross section of the first plug hole, and the plug-in spring on the first plug hole is inserted into the valve body. There is a push rod, the bottom end of the push rod is spherical, a limit plug block fixed with the push rod is inserted on the second socket, a limit rod passing through the second socket is fixed on the top of the limit plug block, a second compression spring sleeved on the limit rod is installed between the end face of the second socket and the top face of the limit plug block, a vertical block is fixed on the top of the rotary block, a first transverse through hole is opened on the vertical block, a second transverse through hole is opened on the limit rod, the first transverse through hole and the second transverse through hole are coaxially arranged and a lock is installed; the top surface of the valve body is flat and has a pair of spherical concave holes arranged at 90 degrees, one spherical concave hole is for the fully open position of the valve core, and the other spherical concave hole is for the fully closed position of the valve core, the bottom end of the push rod cooperates with any one of the spherical concave holes; a breaking rod is fixed on the top of the valve stem. 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 medium; the function of the valve seat, sealing ring, and first compression spring here is to make the sealing ring valve seat pressed against the spherical surface of the valve core through the first compression spring, which not only has better sealing performance, but also can compensate for the position of the worn sealing ring, thereby increasing the service life of the sealing ring and reducing the high maintenance cost caused by frequent disassembly and assembly of the valve; the function of the rotary block and locking piece here is to lock the valve stem in the fully open or fully closed position, so that it cannot move, and even informal employees or children cannot make mistakes, eliminating safety hazards; the working principle of the locking piece here is: first open the lock with a key and lock it from the first transverse perforation and When the spool is fully closed, the push rod reaches the next spherical recessed hole and is stuck in the next spherical recessed hole by the reset force of the second compression spring, making a "click" sound. At this time, it indicates that the spool is in the fully closed position. Finally, the lock is used and sleeved on the first and second lateral recessed holes and the lock is locked, so as to avoid misoperation caused by bending the push rod (the push rod is longitudinally limited by the lock and cannot rise, thereby preventing the spool from rotating).

[0006] Further improvement, a first self-lubricating layer is provided on the plug-in surface of the valve body, and the first self-lubricating layer is plug-fitted with the valve seat. The function of the first self-lubricating layer is to make the valve seat move more easily, reduce friction resistance, and avoid jamming; the first self-lubricating layer is made of tin bronze material.

[0007] Further improvement, a support is fixed on the valve body, a support platform with a cross section smaller than the support is fixed on the top of the support platform, a first bearing is sleeved on the support platform, a groove is opened on the top of the support platform, a thrust bearing is installed at the groove, a circular concave hole is opened on the bottom surface of the valve core, a self-lubricating bushing is sleeved at the circular concave hole, the self-lubricating bushing is inserted into the outer ring of the first bearing, and the self-lubricating bushing is placed on the top of the thrust bearing. Here, the support, the support platform, the first bearing, the groove, the thrust bearing, and the circular concave hole are used to not only support the valve seat in the longitudinal direction, but also to support the valve core in the transverse direction when the medium pressure acts on the valve core, so that when the valve core rotates, the gravity of the valve core will not press on the sealing ring, so that the friction force on the sealing ring is low, not only in the process of fully opening or fully closing the ball valve, but also in the process of fully opening or fully closing the ball valve, the wear of the sealing ring is smaller and the service life is longer; the role of the self-lubricating bushing is to facilitate the valve core to be tightly installed on the first bearing and the thrust bearing through the circular concave hole; the self-lubricating bushing is made of tin bronze material.

[0008] Further improvement, circular blocks inserted in the longitudinal channel are provided above and below the valve core, first inclined slopes are provided at the opposite side ends of the two valve seats, second inclined slopes cooperating with the first inclined slopes are provided at the opposite sides of the two circular blocks, a group of columns evenly spaced and arranged along the circular blocks and having an elliptical cross-section are fixed on the two circular blocks, each column is inserted in the valve body, each column has a threaded channel hole, each threaded channel hole is threadedly connected with a threaded rod, and a group of reduction motors for driving each threaded rod to rotate are fixed on the valve body. Here, the role of the circular block, the first inclined slope, the second inclined slope, the column, the threaded channel hole, the threaded rod, and the reduction motor is to enable the sealing ring to be out of the compression state on the spherical surface of the valve core during the process of fully opening or fully closing the ball valve, thereby greatly reducing the wear of the sealing ring, thereby greatly improving the service life of the sealing ring, thereby greatly reducing the replacement frequency of the sealing ring (wearing parts), and greatly reducing the maintenance cost of the ball valve.

[0009] Further improvement, a second self-lubricating layer is provided on both first inclined slopes; a third self-lubricating layer is provided on the outer contours of both circular ring blocks. The function of the second self-lubricating layer here is to reduce the friction resistance when the second inclined slope presses the first inclined slope, making it easier to drive the valve seat to move outward and to separate the sealing ring from the pressure on the valve core surface; the second self-lubricating layer here is made of tin bronze material; the function of the third self-lubricating layer here is to reduce the friction resistance between the circular ring block and the inner wall of the longitudinal channel when the circular ring block moves up and down, and the circular ring block moves more smoothly; the third self-lubricating layer here is made of tin bronze material.

[0010] Further improvement, the valve body includes a left valve block, a right valve block and a middle valve block, and the left valve block and the right valve block are respectively fixed to the middle valve block by fasteners. Here, the valve body adopts the assembly method of the left valve block, the right valve block and the middle valve block, which not only facilitates the installation of the valve core, but also reduces the production cost of the ball valve. There is no need to produce and process the valve body in the form of casting. Not only is the production more environmentally friendly (it can be processed by forging and lathe turning), but the processing is also easier (the flow channel processing of the traditional valve body is very time-consuming and labor-intensive).

[0011] The beneficial effects of the utility model are:

[0012] 1). The valve stem can be locked in the fully closed or fully open position through the locking piece to avoid misoperation and be safer;

[0013] 2) When the valve core is fully opened or fully closed, the valve seat can be moved outward and the sealing ring can be separated from the spherical surface of the valve core, thereby greatly reducing the wear of the sealing ring, or even eliminating wear, increasing the service life of the sealing ring, thereby reducing the frequency of replacing the sealing ring and greatly reducing the maintenance cost of the ball valve;

[0014] 3) The valve core can be supported longitudinally and against lateral forces, thereby preventing the gravity of the valve core and the lateral pressure of the medium from acting on the sealing ring, which may cause the valve core to be fully opened or fully closed. The sealing ring can greatly reduce wear and increase its service life, thereby increasing the service life of the ball valve and greatly reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 A local enlarged view of area A;

[0017] Figure 3 for Figure 1 A local enlarged view of area B;

[0018] Figure 4 It is a structural schematic diagram of the locking member area in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the upper side circular ring block area of ​​the utility model;

[0020] Figure 6 It is a structural schematic diagram of the lower side circular ring block area of ​​the utility model;

[0021] Figure 7 It is a three-dimensional diagram of the middle valve block in the utility model;

[0022] Figure 8 for Figure 3 CC cross-section diagram.

[0023] Description of the reference numerals: valve body 1, transverse flow channel 1-1, longitudinal channel 1-2, spherical concave hole 1-3, first self-lubricating layer 1-4, left valve block 1a, right valve block 1b, middle valve block 1c, valve core 2, valve seat 3, first inclined slope 3-1, second self-lubricating layer 3-1a, sealing ring 4, first compression spring 5, valve stem 6, rotary block 6-1, locking member 7, first plug hole 7-1, second plug hole 7-2, push rod 7-3, limit plug block 7-4 , second compression spring 7-5, limit rod 7-6, second transverse perforation 7-6a, vertical block 7-7, first transverse perforation 7-7a, lock 7-8, bend rod 8, support 9, support platform 9-1, groove 9-1a, first bearing 10, thrust bearing 11, self-lubricating bushing 12, circular ring block 13, second inclined slope 13-1, third self-lubricating layer 13-2, column rod 14, threaded channel hole 14-1, threaded rod 15, reduction motor 16. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Referring to the accompanying drawings: This anti-misoperation fixed ball valve includes a valve body 1, a transverse flow channel 1-1 and a longitudinal channel 1-2 connected to the transverse flow channel 1-1 are opened on the valve body 1, a valve core 2 for opening and closing the transverse flow channel 1-1 is installed on the valve body 1, valve seats 3 plugged into the valve body 1 are arranged on the left and right sides of the valve core 2, sealing rings 4 are installed on the two valve seats 3, a group of first compression springs 5 ​​are installed on the two valve seats 3, which are evenly distributed along the center of the valve seat 3 and press the sealing ring 4 toward the spherical surface of the valve core 2, a valve stem 6 for rotating the valve core 2 is installed on the valve body 1, a rotary block 6-1 located at the upper end of the top surface of the valve body 1 is fixed on the valve stem 6, and a locking member 7 is installed on the rotary block 6-1; the locking member 7 includes a first plug hole 7-1 and a second plug hole 7-2 opened on the rotary block 6-1, and the second plug hole 7-2 is provided on the rotary block 6-1. The cross section of the hole 7-2 is larger than that of the first plug hole 7-1. A push rod 7-3 is inserted into the first plug hole 7-1, and the bottom end of the push rod 7-3 is spherical. A limit plug block 7-4 fixed with the push rod 7-3 is inserted into the second plug hole 7-2. A limit rod 7-6 passing through the second plug hole 7-2 is fixed to the top of the limit plug block 7-4. A second compression spring 7-5 sleeved on the limit rod 7-6 is installed between the end surface of the second plug hole 7-2 and the top surface of the limit plug block 7-4. A vertical block 7-7 is fixed to the top of the rotary block 6-1. A first transverse through hole 7-7a is opened on the vertical block 7-7, and a second transverse through hole 7-6a is opened on the limit rod 7-6. The first transverse through hole 7-7a and the second transverse through hole 7-6a are coaxially arranged and a lock 7-8 is installed.

[0026] The top surface of the valve body 1 is flat and has a pair of spherical recessed holes 1-3 set at 90 degrees. One spherical recessed hole 1-3 is the fully open position of the valve core, and the other spherical recessed hole 1-3 is the fully closed position of the valve core. The bottom end of the push rod 7-3 cooperates with any one of the spherical recessed holes 1-3; a pry rod 8 is fixed to the top end of the valve stem 6.

[0027] A first self-lubricating layer 1 - 4 is provided on the plug-in surface of the valve body 1 , and the first self-lubricating layer 1 - 4 is plug-fitted with the valve seat 3 .

[0028] A support 9 is fixed on the valve body 1, and a support platform 9-1 with a cross-section smaller than that of the support 9 is fixed on the top of the support 9. A first bearing 10 is sleeved on the support platform 9-1. A groove 9-1a is opened at the top of the support platform 9-1, and a thrust bearing 11 is installed in the groove 9-1a. A circular concave hole 2-1 is opened on the bottom surface of the valve core 2, and a self-lubricating bushing 12 is sleeved in the circular concave hole 2-1. The self-lubricating bushing 12 is inserted into the outer ring of the first bearing 10, and the self-lubricating bushing 12 is placed on the top of the thrust bearing 11.

[0029] Circular blocks 13 inserted in the longitudinal channel 1-1 are provided above and below the valve core 2, first inclined slopes 3-1 are provided at opposite side ends of the two valve seats 3, second inclined slopes 13-1 cooperating with the first inclined slopes 3-1 are provided on opposite sides of the two circular blocks 13, a group of columns 14 evenly spaced along the circular blocks 13 and having an elliptical cross-section are fixed on the two circular blocks 13, each column 14 is inserted in the valve body 1, a threaded channel hole 14-1 is opened on each column 14, each threaded channel hole 14-1 is threadedly connected with a threaded rod 15, and a group of reduction motors 16 for driving each threaded rod 15 to rotate are fixed on the valve body 1.

[0030] A second self-lubricating layer 3 - 1 a is disposed on each of the two first inclined slopes 3 - 1 ; and a third self-lubricating layer 13 - 2 is disposed on the outer contours of each of the two annular blocks 13 .

[0031] The valve body 1 comprises a left valve block 1a, a right valve block 1b and a middle valve block 1c. The left valve block 1c and the right valve block 1d are respectively fixed to the middle valve block 1c by fasteners.

[0032] The working principle of the utility model is as follows: when the ball valve needs to be fully closed, it is only necessary to energize each reduction motor 16, so that the rotating shaft on the reduction motor 16 rotates and drives the threaded rod 15 to rotate, thereby driving the column rod 14 (the column rod 14 is elliptical and will not rotate) to move downward, thereby driving the two circular ring blocks 13 on the upper and lower sides to move closer to each other and use the second inclined slope 13-1 to press the first inclined slope 3-1, so that the valve seats 3 on both sides move outward synchronously (the first compression spring 5 is compressed to store energy), so that the seal The sealing ring 4 is separated from the pressure on the spherical surface of the valve core 2. Then, the lock 7-8 is opened by the key and taken out from the first transverse through hole 7-7a and the second transverse through hole 7-6a. Then, the lever 8 is moved to make the valve stem 6 and the rotary block 6-1 rotate together. Then, the push rod 7-3 is blocked by the spherical concave hole 1-3 and moves upward and compresses the second compression spring 7-5 to store energy. When the valve core 2 is rotated to the fully closed position, the push rod 7-3 reaches the next spherical concave hole 1-3 and passes through the second compression spring 7- The reset force of 5 causes the push rod 7-3 to be stuck in the next spherical concave hole 1-3 and make a "click" sound. At this time, it means that the valve core is in the fully closed position. Subsequently, each reduction motor 16 is powered on again, and the shaft on the reduction motor 16 rotates in the opposite direction to drive the threaded rod 15 to rotate in the opposite direction, thereby driving the column 14 (the column 14 is elliptical and will not rotate) to move upward, thereby driving the two circular ring blocks 13 on the upper and lower sides to move away from each other and causing the second inclined slope 13-1 to release the first inclined slope 3-1. The first compression spring 5 is pressed to move the valve seats 3 on both sides closer to each other, so that the sealing ring 4 is pressed against the spherical surface of the valve core 2, thereby completing the full-close sealing operation of the ball valve. Finally, the lock 7-8 is used to be sleeved on the first transverse through-hole 7-7a and the second transverse through-hole 7-6a and the lock 7-8 is locked, so as to avoid the misoperation caused by the outside world (whether intentional or not) bending the bend rod 8, which will be safer and avoid potential safety hazards. It is worthy of popularization and application.

[0033] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A fixed ball valve for preventing misoperation, comprising a valve body (1), wherein the valve body (1) is provided with a transverse flow channel (1-1) and a longitudinal channel (1-2) communicating with the transverse flow channel (1-1), wherein: The valve body (1) is provided with a valve core (2) for opening and closing a transverse flow passage (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 provided with sealing rings (4); the two valve seats (3) are provided with a group of first compression springs (5) evenly distributed along the center of the valve seat (3) and pressing the sealing ring (4) toward the spherical surface of the valve core (2); the valve body (1) is provided with a valve stem (6) for rotating the valve core (2); the valve stem (6) is fixed with a rotary block (6-1) located at the upper end of the top surface of the valve body (1); the rotary block (6-1) is provided with a locking member (7); The locking member (7) comprises a first plug hole (7-1) and a second plug hole (7-2) opened on the rotary block (6-1); the cross section of the second plug hole (7-2) is larger than the cross section of the first plug hole (7-1); a push rod (7-3) is inserted into the first plug hole (7-1); the bottom end of the push rod (7-3) is spherical; a limiting plug block (7-4) fixed to the push rod (7-3) is inserted into the second plug hole (7-2); a limiting rod passing through the second plug hole (7-2) is fixed to the top end of the limiting plug block (7-4). (7-6), a second compression spring (7-5) sleeved on the limiting rod (7-6) is installed between the end surface of the second plug hole (7-2) and the top surface of the limiting plug block (7-4), a vertical block (7-7) is fixed on the top of the rotating block (6-1), a first transverse through hole (7-7a) is formed on the vertical block (7-7), a second transverse through hole (7-6a) is formed on the limiting rod (7-6), and the first transverse through hole (7-7a) and the second transverse through hole (7-6a) are coaxially arranged and a lock (7-8) is installed therebetween; The top surface of the valve body (1) is a plane and has a pair of spherical concave holes (1-3) arranged at 90 degrees, one of the spherical concave holes (1-3) is the fully open position of the valve core, and the other spherical concave hole (1-3) is the fully closed position of the valve core, and the bottom end of the push rod (7-3) cooperates with any one of the spherical concave holes (1-3); A breaking rod (8) is fixed to the top end of the valve stem (6).

2. The anti-misoperation fixed ball valve according to claim 1 is characterized in that: A first self-lubricating layer (1-4) is provided on the plug-in surface of the valve body (1), and the first self-lubricating layer (1-4) is plug-fitted to the valve seat (3).

3. The anti-misoperation fixed ball valve according to claim 1 is characterized in that: A support (9) is fixed on the valve body (1), a support platform (9-1) with a cross-section smaller than the support (9) is fixed on the top of the support (9), a first bearing (10) is sleeved on the support platform (9-1), a groove (9-1a) is opened at the top of the support platform (9-1), a thrust bearing (11) is installed at the groove (9-1a), a circular concave hole (2-1) is opened on the bottom surface of the valve core (2), a self-lubricating bushing (12) is sleeved at the circular concave hole (2-1), the self-lubricating bushing (12) is inserted into the outer ring of the first bearing (10), and the self-lubricating bushing (12) is placed on the top of the thrust bearing (11).

4. The anti-misoperation fixed ball valve according to claim 3 is characterized in that: A circular block (13) inserted in the longitudinal channel (1-2) is provided above and below the valve core (2); a first inclined slope (3-1) is provided at the opposite side ends of the two valve seats (3); a second inclined slope (13-1) cooperating with the first inclined slope (3-1) is provided at the opposite sides of the two circular blocks (13); a group of columnar rods (14) evenly spaced along the circular blocks (13) and having an elliptical cross-section are fixed on the two circular blocks (13); each of the columnar rods (14) is inserted in the valve body (1); each of the columnar rods (14) is provided with a threaded channel hole (14-1); each of the threaded channel holes (14-1) is threadedly connected to a threaded rod (15); and a group of reduction motors (16) for driving each of the threaded rods (15) to rotate are fixed on the valve body (1).

5. The anti-misoperation fixed ball valve according to claim 4 is characterized in that: A second self-lubricating layer (3-1a) is provided on each of the two first inclined slopes (3-1); and a third self-lubricating layer (13-2) is provided on the outer contours of each of the two annular blocks (13).

6. The anti-misoperation fixed ball valve according to claim 1 is characterized in that: The valve body (1) comprises a left valve block (1a), a right valve block (1b) and a middle valve block (1c); the left valve block (1a) and the right valve block (1b) are respectively fixed to the middle valve block (1c) by fasteners.

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