Alloy hard sealing ball valve

Abstract

The utility model discloses an alloy hard sealing ball valve which comprises a valve body, a ball body, a first hard sealing piece, a second hard sealing piece and a locking rod, the ball body is arranged in a valve cavity in the valve body, a water inlet is formed in one end of the valve body, a water outlet is formed in the other end of the valve body, and the locking rod is arranged in the valve body. The second hard sealing piece is fixed to the connecting position of the water inlet, the water outlet and the valve cavity, the first hard sealing piece is arranged on one side of the second hard sealing piece, a positioning lock disc is fixed to the top end of the valve body, lock holes are formed in the top end of the positioning lock disc at equal intervals, a valve rod is installed at the top of the valve body, and the valve rod is connected with the valve cavity. The top end of the valve rod penetrates through the positioning lock disc and is provided with a handle, a through hole is formed in one end in the handle, and the lock rod is arranged in the through hole in a penetrating mode. According to the utility model, a double-sealing structure is adopted, the wear resistance is good, the sealing performance is good, and the handle can be locked, so that mistaken opening or closing caused by mistaken touch is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to an alloy hard-sealed ball valve. Background Art

[0002] A ball valve is a valve that rotates the ball around the valve axis through the valve stem. It is mainly used to cut off or connect the medium in the pipeline, and can also be used for fluid regulation and control. A hard-sealed ball valve refers to a ball valve with a sealing surface made of metal materials. It has the characteristics of reliable sealing, long service life, and high safety, making it suitable for media under some special working conditions, such as high temperature, high pressure, and highly corrosive media. The sealing surface of a hard-sealed ball valve can be made of various alloy materials, such as stainless steel, tungsten steel, tempered chromium steel, etc. These materials have high hardness, good wear resistance, and reliable sealing performance.

[0003] At present, most ball valves use a single seal for hard seals. As the ball rotates repeatedly, the hard seal is prone to wear, resulting in a decrease in sealing performance. In addition, the sealing performance between the hard seal and the ball valve is average, and liquid leakage is prone to occur. In addition, the handle lacks a lock after the ball valve is opened and closed, and the handle is easily rotated due to accidental contact, resulting in the ball valve being opened or closed by mistake, affecting the regulation and control of the fluid. Therefore, improvement is urgently needed. Utility Model Content

[0004] The utility model aims to provide an alloy hard-sealed ball valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an alloy hard-sealed ball valve, comprising a valve body, a ball, a first hard seal, a second hard seal and a locking rod, the ball being arranged in a valve cavity inside the valve body, a water inlet being arranged at one end of the valve body, and a water outlet being arranged at the other end of the valve body, the water outlet and the water inlet being both communicated with the valve cavity, the second hard seal being fixed at the connection between the water inlet, the water outlet and the valve cavity, and a second step being arranged on the outer wall on one side of the second hard seal, the first hard seal being arranged on one side of the second hard seal, and the first hard seal A first step is provided on the outer wall on one side of the component, and the first step is tightly engaged with the second step. A wear-resistant layer is fixed on the outer wall of the first hard seal on the side close to the spherical body, and the wear-resistant layer is tightly fitted with the spherical body. A positioning lock disk is fixed on the top of the valve body, and the top of the positioning lock disk is provided with lock holes at equal intervals. A valve stem is installed on the top of the valve body, and the top of the valve stem passes through the positioning lock disk and is provided with a handle. The bottom end of the valve stem extends to the interior of the valve cavity and is fixedly connected to the spherical body. A through hole is provided at one end of the handle, and the lock rod is penetrated into the interior of the through hole, and the bottom end of the lock rod extends to the interior of the lock hole.

[0006] Preferably, an annular mounting groove is provided at one end of the water inlet, and mounting slots are provided on the inner wall of the annular mounting groove.

[0007] Preferably, an annular filter screen is provided inside the annular mounting groove to filter the fluid and remove impurities inside the fluid, thereby reducing blockage inside the ball valve.

[0008] Preferably, a slide groove is provided at the edge position inside the annular filter screen, and a clamping block is slidably installed inside the slide groove, and one end of the clamping block extends to the inside of the installation groove.

[0009] Preferably, the first hard seal and the second hard seal are both made of tungsten steel.

[0010] Preferably, the wear-resistant layer is made of nickel-based alloy.

[0011] Preferably, a first magnet sheet is fixed to the bottom end of the handle outside the locking rod.

[0012] Preferably, a second magnet sheet is fixed on the outer wall of the lock rod below the first magnet sheet, and the second magnet sheet is magnetically attracted to the first magnet sheet to facilitate positioning of the lock rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Since the first hard seal and the second hard seal are provided at the connection between the water inlet, the water outlet and the valve cavity, the second hard seal is integrally formed with the valve body, and the first hard seal is engaged with the second step on the outer wall of the second hard seal through the first step, thereby improving the sealing between the first hard seal and the valve body, and preventing liquid from seeping. The wear-resistant layer on the other side of the first hard seal fits tightly with the ball to seal the first hard seal and the ball. The first hard seal is made of tungsten steel and has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. At the same time, the wear-resistant layer is made of nickel-based alloy and has good wear resistance, thereby further improving the wear resistance of the first hard seal, so that the first hard seal and the ball always maintain a hard sealing state;

[0015] After the handle is turned to the specified state, the lock rod is pressed to separate the second magnet sheet from the first magnet sheet, and the lock rod is inserted into the corresponding lock hole on the surface of the positioning lock disk to lock the handle, thereby preventing accidental opening or closing caused by accidental touch. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 3 For the utility model Figure 1 The enlarged structural diagram at B in the middle;

[0019] Figure 4 This is a schematic diagram of the enlarged structure of the positioning lock disk of the utility model from top view;

[0020] Figure 5 It is a schematic diagram of the enlarged structure of the annular filter screen of the utility model.

[0021] In the figure: 1. valve body; 2. valve chamber; 3. sphere; 4. first hard seal; 401. first step; 402. wear-resistant layer; 5. second hard seal; 501. second step; 6. water inlet; 7. annular mounting groove; 8. annular filter; 801. slide groove; 802. block; 9. mounting groove; 10. valve stem; 11. handle; 12. positioning lock disk; 1201. lock hole; 13. water outlet; 14. through hole; 15. lock rod; 16. first magnet sheet; 17. second magnet sheet. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides an embodiment: an alloy hard-sealed ball valve, comprising a valve body 1, a ball 3, a first hard seal 4, a second hard seal 5 and a lock rod 15, the ball 3 is arranged in a valve cavity 2 inside the valve body 1, one end of the valve body 1 is provided with a water inlet 6, and the other end of the valve body 1 is provided with a water outlet 13, the water outlet 13 and the water inlet 6 are both connected to the valve cavity 2;

[0024] The second hard seal 5 is fixed at the connection between the water inlet 6, the water outlet 13 and the valve chamber 2, and a second step 501 is provided on the outer wall of one side of the second hard seal 5;

[0025] The first hard seal 4 is arranged on one side of the second hard seal 5, and a first step 401 is formed on the outer wall of one side of the first hard seal 4, and the first step 401 is tightly engaged with the second step 501. A wear-resistant layer 402 is fixed on the outer wall of the first hard seal 4 close to the sphere 3, and the wear-resistant layer 402 is tightly engaged with the sphere 3;

[0026] Specifically, since the first hard seal 4 and the second hard seal 5 are provided at the connection between the water inlet 6, the water outlet 13 and the valve cavity 2, the second hard seal 5 is integrally formed with the valve body 1, and the first hard seal 4 is engaged with the second step 501 on the outer wall of the second hard seal 5 through the first step 401, thereby improving the sealing between the first hard seal 4 and the valve body 1, and preventing liquid from seeping. The wear-resistant layer 402 on the other side of the first hard seal 4 fits tightly with the sphere 3 to seal the first hard seal 4 and the sphere 3. The first hard seal 4 is made of tungsten steel and has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance. At the same time, the wear-resistant layer 402 is made of nickel-based alloy and has good wear resistance, thereby further improving the wear resistance of the first hard seal 4, so that the first hard seal 4 and the sphere 3 always maintain a hard sealing state;

[0027] A positioning lock plate 12 is fixed to the top of the valve body 1, and the top of the positioning lock plate 12 is provided with lock holes 1201 at equal intervals;

[0028] A valve stem 10 is installed on the top of the valve body 1, and the top end of the valve stem 10 passes through the positioning lock plate 12 and is installed with a handle 11, and the bottom end of the valve stem 10 extends into the interior of the valve cavity 2 and is fixedly connected to the ball 3;

[0029] A through hole 14 is provided at one end of the handle 11, a locking rod 15 is passed through the through hole 14, and a bottom end of the locking rod 15 extends to the inside of the locking hole 1201;

[0030] Specifically, after the handle 11 is turned to a specified state, the lock rod 15 is pressed to separate the second magnet sheet 17 from the first magnet sheet 16, and the lock rod 15 is inserted into the lock hole 1201 corresponding to the surface of the positioning lock plate 12, so that the handle 11 can be locked, thereby preventing accidental opening or closing caused by accidental touch;

[0031] An annular mounting groove 7 is provided at one end of the water inlet 6, and mounting slots 9 are provided on the inner wall of the annular mounting groove 7;

[0032] An annular filter screen 8 is arranged inside the annular mounting groove 7;

[0033] A slide groove 801 is provided at the edge of the inner part of the annular filter screen 8, and a clamping block 802 is slidably installed inside the slide groove 801, and one end of the clamping block 802 extends to the inside of the mounting clamping groove 9;

[0034] Specifically, the annular filter screen 8 filters the fluid and removes the impurities inside the fluid, thereby reducing the blockage inside the ball valve. Furthermore, by pushing the clamping block 802 to disengage from the mounting clamping slot 9 and retract it into the slide slot 801, the annular filter screen 8 can be removed so as to be cleaned.

[0035] The first hard seal 4 and the second hard seal 5 are both made of tungsten steel;

[0036] The wear-resistant layer 402 is made of nickel-based alloy;

[0037] A first magnet sheet 16 is fixed to the bottom end of the handle 11 outside the locking rod 15;

[0038] A second magnet sheet 17 is fixed to the outer wall of the locking rod 15 below the first magnet sheet 16 , and the second magnet sheet 17 is magnetically attracted to the first magnet sheet 16 .

[0039] When the embodiment of the present application is in use: first, pull the handle 11 to rotate the valve stem 10, and the valve stem 10 drives the ball 3 to rotate, so as to control the opening and closing state of the ball valve, so as to adjust and control the fluid. Since the first hard seal 4 and the second hard seal 5 are provided at the connection between the water inlet 6, the water outlet 13 and the valve cavity 2, the second hard seal 5 and the valve body 1 are integrally formed, and the first hard seal 4 is engaged with the second step 501 on the outer wall of the second hard seal 5 through the first step 401, thereby improving the sealing between the first hard seal 4 and the valve body 1, and preventing liquid from seeping. The wear-resistant layer 402 on the other side of the first hard seal 4 is tightly fitted with the ball 3 to seal the first hard seal 4 and the ball 3. The first hard seal 4 is made of tungsten steel, and has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. At the same time, the wear-resistant layer 402 is made of nickel-based alloy material. The invention has good quality and wear resistance, thereby further improving the wear resistance of the first hard seal 4, so that the first hard seal 4 and the sphere 3 always maintain a hard sealing state. Then, after the handle 11 is turned to the specified state, the locking rod 15 is pressed to separate the second magnet sheet 17 from the first magnet sheet 16, and the locking rod 15 is inserted into the locking hole 1201 corresponding to the surface of the positioning lock disk 12, so as to lock the handle 11, thereby preventing accidental opening or closing caused by accidental contact, and the flow enters the valve cavity 2 from the water inlet 6, passes through the flow channel inside the sphere 3, and is discharged through the water outlet 13, wherein the annular filter screen 8 filters the fluid and filters out the impurities inside it, thereby reducing the blockage inside the ball valve, and the annular filter screen 8 can be removed by pushing the block 802 to disengage it from the mounting slot 9 and retract it into the slide slot 801, so as to clean the annular filter screen 8.

Claims

1. An alloy hard-sealed ball valve, characterized in that: The invention comprises a valve body (1), a ball (3), a first hard seal (4), a second hard seal (5) and a locking rod (15), wherein the ball (3) is arranged in a valve cavity (2) inside the valve body (1), a water inlet (6) is arranged at one end of the valve body (1), and a water outlet (13) is arranged at the other end of the valve body (1), the water outlet (13) and the water inlet (6) are both connected to the valve cavity (2), the second hard seal (5) is fixed at the connection between the water inlet (6), the water outlet (13) and the valve cavity (2), and a second step (501) is arranged on the outer wall of one side of the second hard seal (5), the first hard seal (4) is arranged on one side of the second hard seal (5), and a first step (401) is arranged on the outer wall of one side of the first hard seal (4), and the first step (401) and the second step (501) are connected to each other. The step (501) is tightly engaged, a wear-resistant layer (402) is fixed on the outer wall of the first hard seal (4) on the side close to the sphere (3), and the wear-resistant layer (402) is tightly fitted with the sphere (3), a positioning lock disk (12) is fixed on the top of the valve body (1), and the top of the positioning lock disk (12) is provided with lock holes (1201) at equal intervals, a valve stem (10) is installed on the top of the valve body (1), and the top of the valve stem (10) passes through the positioning lock disk (12) and is installed with a handle (11), the bottom end of the valve stem (10) extends to the inside of the valve cavity (2) and is fixedly connected to the sphere (3), one end of the handle (11) is provided with a through hole (14), the lock rod (15) is penetrated in the inside of the through hole (14), and the bottom end of the lock rod (15) extends to the inside of the lock hole (1201).

2. The alloy hard-sealed ball valve according to claim 1, characterized in that: An annular mounting groove (7) is provided at one end of the water inlet (6), and mounting slots (9) are provided on the inner wall of the annular mounting groove (7).

3. The alloy hard-sealed ball valve according to claim 2, characterized in that: An annular filter screen (8) is arranged inside the annular mounting groove (7).

4. The alloy hard-sealed ball valve according to claim 3, characterized in that: The inner edge of the annular filter screen (8) is provided with a slide groove (801), and a clamping block (802) is slidably installed inside the slide groove (801), and one end of the clamping block (802) extends to the inside of the installation clamping groove (9).

5. The alloy hard-sealed ball valve according to claim 1, characterized in that: The first hard sealing component (4) and the second hard sealing component (5) are both made of tungsten steel.

6. The alloy hard-sealed ball valve according to claim 1, characterized in that: The wear-resistant layer (402) is made of nickel-based alloy.

7. The alloy hard-sealed ball valve according to claim 1, characterized in that: A first magnet sheet (16) is fixed to the bottom end of the handle (11) outside the locking rod (15).

8. The alloy hard-sealed ball valve according to claim 7, characterized in that: A second magnet sheet (17) is fixed to the outer wall of the locking rod (15) below the first magnet sheet (16), and the second magnet sheet (17) is magnetically attracted to the first magnet sheet (16).

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