Novel low-temperature micro-lift safety valve

Abstract

The novel low-temperature micro-lift safety valve relates to the technical field of safety valves and comprises a valve body, a water inlet and a water outlet are formed in the valve body, a first sealing ball used for sealing the water inlet is arranged in the valve body in a sliding mode, and a first boss is fixed to the inner side wall of the water inlet; the inner side wall of the first sealing ball abuts against the end of the first boss. The valve has the effect of improving the sealing performance of the valve body.

Description

Technical Field

[0001] The present application relates to the technical field of safety valves, and in particular to a novel low-temperature micro-opening safety valve. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium outside the system.

[0003] Publication No. CN208024893U discloses a low-temperature and high-pressure micro-opening safety valve, which relates to the technical field of special valve equipment. The utility model comprises a valve body (1), a valve seat (2), a valve cover (3), a valve top (4), a valve stem (5), and a spring (6). The valve seat (2) is installed in a channel of the valve body (1) through a thread, the valve cover (3) is sleeved above the valve seat (2), and the valve stem (5) is installed in the valve cover (3) through a spring (6). The utility model is characterized in that: a conical sealing surface (7) is arranged above the valve seat (2), a sealing convex ball (8) matching the conical sealing surface (7) is arranged below the valve top (4), the valve top (4) is installed directly above the conical sealing surface (7) of the valve seat (2) through the valve stem (5), and a surfacing alloy buffer layer (9) is also provided on the inner side of the conical sealing surface (7), and the surfacing alloy buffer layer (9) is consistent with the shape of the conical sealing surface (7). The utility model has the advantages of improving the service life and working stability of the safety valve.

[0004] In the process of implementing the above application, the inventor found that there are at least the following problems in this technology: the sealing part of the above water inlet relies on a spring for reset. When the impact force of the water flow is less than the elastic force of the spring, the spring pushes the sealing block to reset. However, after a long period of use, the spring may be deformed, resulting in a weakening of the sealing performance. Utility Model Content

[0005] In order to improve the sealing performance of the valve body, the present application provides a new type of low-temperature micro-opening safety valve.

[0006] The novel low-temperature micro-opening safety valve provided in this application adopts the following technical solution:

[0007] A novel low-temperature micro-opening safety valve comprises a valve body, which is provided with a water inlet and a water outlet. A first closing ball for closing the water inlet is slidably arranged inside the valve body, a first boss is fixed to the inner wall at the water inlet, and the inner wall of the first closing ball abuts against the end of the first boss.

[0008] By adopting the above technical solution, the first closing ball abuts against the first boss. During use, the first closing ball acts on the first boss by its own weight and seals the first boss, thereby closing the water inlet. After the impact force of the water flow increases, when the impact force of the water flow exceeds the weight of the first closing ball, the first closing ball is pushed. At this time, the liquid can enter the valve body through the water inlet. At the same time, in the process of the liquid pushing the first closing ball, since the first closing ball is round, the rotation of the first closing ball will not affect the progress of the working process.

[0009] Optionally, a connecting portion is fixed to the side wall of the first closed ball, a second closed ball is fixed to the end of the connecting portion, and a diameter of the second closed ball is greater than a diameter of the inner side wall of the first boss.

[0010] By adopting the above technical solution, the second closing ball is connected to the first closing ball through the connecting part. At the same time, the diameter of the second closing ball is larger than the diameter of the inner wall of the first boss, which reduces the possibility of the second closing ball entering the valve body through the first boss. When the impact force of the water flow is too large, the second closing ball can abut against the first boss, thereby closing the water inlet again and controlling the water flow rate within a certain range.

[0011] Optionally, both ends of the valve body are opened, one end is detachably connected to a locking part, the water inlet is opened in the locking part and passes through the locking part, and the cross-section of the inner wall of the locking part is a shape composed of a rectangle, a trapezoid, or a rectangle.

[0012] By adopting the above technical solution, the water inlet penetrates the locking part, making the locking part hollow, and the second closing ball is placed in the locking part. Since the cross-section of the inner wall of the locking part is a shape composed of a rectangle, a trapezoid, and a rectangle, it is convenient to install the second closing ball inside the locking part.

[0013] Optionally, the end of the locking portion is detachably connected to a positioning portion, the positioning portion is hollow and the diameter of the inner wall of the positioning portion is smaller than the diameter of the second closed ball.

[0014] By adopting the above technical solution, the positioning part is hollow and the diameter of the inner wall of the positioning part is smaller than the diameter of the second closing ball. The positioning part limits the second closing ball, reduces the possibility of the second closing ball escaping from the locking part, and improves the stability of the second closing ball.

[0015] Optionally, a sealing ring is fixed to the end of the first boss, and the side wall of the first closed ball abuts against the sealing ring.

[0016] By adopting the above technical solution, the side wall of the first closing ball abuts against the sealing ring, thereby enhancing the sealing performance between the first closing ball and the first boss.

[0017] Optionally, a sealing portion is detachably connected to an opening of the valve body away from the locking portion, a sealing ring is fixed to an end surface of the sealing portion, and the sealing ring abuts against the end of the valve body.

[0018] By adopting the above technical solution, the sealing ring abuts against the end of the valve body, thereby enhancing the sealing between the sealing portion and the valve body and reducing the possibility of liquid leakage.

[0019] Optionally, the weight of the second closed ball is greater than the weight of the first closed ball.

[0020] By adopting the above technical solution, the second closing ball provides a downward pulling force in the vertical direction to the first closing ball, so that the first closing ball can seal the first boss.

[0021] Optionally, the connecting portion is made of flexible material.

[0022] By adopting the above technical solution, the connecting part is made of flexible material, which can link the first closing ball and the second closing ball while allowing relatively independent movements to be set aside, thereby facilitating the working process.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The first closing ball abuts against the first boss. During use, the first closing ball acts on the first boss by its own weight and seals the first boss, thereby closing the water inlet. When the impact force of the water flow increases, when the impact force of the water flow exceeds the weight of the first closing ball, the first closing ball is pushed. At this time, the liquid can enter the valve body through the water inlet. At the same time, in the process of the liquid pushing the first closing ball, since the first closing ball is round, the rotation of the first closing ball will not affect the working process.

[0025] 2. The sealing ring abuts against the end of the valve body, which enhances the sealing between the sealing part and the valve body and reduces the possibility of liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the main structure of the embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A.

[0028] Description of reference numerals:

[0029] 1. Valve body; 2. Water inlet; 3. Water outlet; 4. First closing ball; 5. First boss; 6. Connecting part; 7. Second closing ball; 8. Locking part; 9. Positioning part; 10. Sealing ring; 11. Sealing ring; 12. Sealing part. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application discloses a novel low-temperature micro-opening safety valve. Figure 1 and Figure 2 The novel low-temperature micro-opening safety valve comprises a valve body 1, which is provided with a water inlet 2 and a water outlet 3. The water inlet 2 facilitates the transfer of liquid to the inside of the valve body 1, and the water outlet 3 facilitates the transfer of liquid in the valve body 1 to the outside of the valve body 1. The valve body 1 is hollow, and a first closing ball 4 is slidably arranged inside the valve body 1. The first closing ball 4 can slide inside the valve body 1 along the axial direction of the valve body 1. The inner side wall at the water inlet 2 is fixed with a first boss 5 by an integral molding method. The first boss 5 is annular, and the inner side wall of the first closing ball 4 abuts against the end of the first boss 5. Due to the first closing ball 4 is spherical, so its mass is larger than that of a conventional blocking block. The traditional spring setting is cancelled inside the valve body 1 in the present invention, and the water inlet 2 is closed by relying on the deadweight of the first closing ball 4. When the impact force of the water flow is greater than the weight of the first closing ball 4, the first closing ball 4 can be pushed to move, and the liquid is transferred to the inside of the valve body 1. When the impact force of the water flow is less than the weight of the first closing ball 4, the first closing ball 4 cannot be pushed to move; at this time, the first closing ball 4 returns to its original position, and when the impact force of the liquid inside the valve body 1 changes, the second closing ball 7 moves down again, so that the inside of the valve body 1 returns to its original state.

[0032] Reference Figure 1 and Figure 2 The side wall of the first closing ball 4 is fixed with a connecting part 6 by bonding or bolting, and the end of the connecting part 6 is fixed with a second closing ball 7 by bonding or bolting. The diameter of the second closing ball 7 is larger than the diameter of the inner wall of the first boss 5, so the second closing ball 7 will not be separated from the first boss 5. At the same time, the weight of the second closing ball 7 is larger than the weight of the first closing ball 4. That is, when the water flow pushes the first closing ball 4 to move, since the first closing ball 4 is connected to the second closing ball 7, and the weight of the second closing ball 7 is larger than the weight of the first closing ball 4, the water flow is equivalent to pushing the first closing ball 4 and the second closing ball 7 to move at the same time. When the impact force of the water flow increases, The second closing ball 7 moves toward the first boss 5, so that the water flow that can pass through the first boss 5 becomes smaller, reducing the impact force on the first closing ball 4, and facilitating the liquid transfer process. At the same time, when the impact force further increases, it will push the second closing ball 7 to abut against the first boss 5, closing the first boss 5, thereby closing the valve body 1, which is equivalent to limiting the maximum value of the water flow rate, thereby reducing the possibility of the valve body 1 being damaged by excessive impact. At the same time, the connecting part 6 can be made of rigid material or flexible material. In this embodiment, the connecting part 6 is made of flexible material to facilitate the movement of the first closing ball 4 and the second closing ball 7.

[0033] Reference Figure 1 and Figure 2 , both ends of the valve body 1 are open, one end of which is detachably connected to a locking portion 8 by a threaded connection. The water inlet 2 is provided with a locking portion 8 and the locking portion 8 is penetrated, so that the cross-sectional shape of the inner wall of the locking portion 8 is a shape composed of a rectangle, a trapezoid, and a rectangle. The width of the rectangle near the water outlet 3 is smaller than the width of the rectangle away from the water outlet 3. The widths at both ends of the trapezoidal cross section correspond to the widths of the two rectangles, respectively. The second closing ball 7 is placed inside the locking portion 8, so that the second closing ball 7 will not penetrate into the valve body 1 through the first boss 5, which is convenient for the working process of the valve body 1; the end of the locking portion 8 of the original proportional valve body 1 is detachably connected to a positioning portion 9 by a threaded connection. The positioning portion 9 is hollow and the diameter of the positioning portion 9 is smaller than the diameter of the second closing ball 7, so that the second closing ball 7 in the locking portion 8 will not break away from the locking portion 8, thereby enhancing the stability of the second closing ball 7.

[0034] Reference Figure 1 and Figure 2 A sealing ring 10 is fixed to the end face of the first boss 5 by bonding. The sealing ring 10 is made of rubber. The side wall of the first closing ball 4 abuts against the side wall of the sealing ring 10. Since the sealing ring 10 is made of rubber, it will deform when it contacts the first closing ball 4, so it can better contact the first closing ball 4, thereby enhancing the sealing at the first closing ball 4; the opening of the valve body 1 away from the locking part 8 is detachably connected to the sealing part 12 by threaded connection. The end face of the sealing part 12 is fixed with a sealing ring 11 by bonding. The sealing ring 11 is made of rubber, and after the sealing part 12 is fixed to the valve body 1, both ends of the sealing ring 11 abut against the end face of the valve body 1 and the end face of the sealing part 12, thereby improving the sealing between the valve body 1 and the sealing part 12, and reducing the possibility of liquid leakage.

[0035] The implementation principle of a new type of low-temperature micro-opening safety valve in the embodiment of the present application is as follows: the first closing ball 4, the locking part 8, the second closing ball 7, and the positioning part 9 are installed, and the water inlet 2 is closed by relying on the dead weight of the first closing ball 4. When the impact force of the water flow is greater than the weight of the first closing ball 4, the first closing ball 4 can be pushed to move, and the liquid is transferred to the inside of the valve body 1. When the impact force of the water flow is less than the weight of the first closing ball 4, the first closing ball 4 cannot be pushed to move; at this time, the first closing ball 4 returns to its original position, and when the impact force of the liquid inside the valve body 1 changes, the second closing ball 7 moves down again to restore the inside of the valve body 1 to its original state. When the second closing ball 7 moves down, if the impact force of the water is just greater than the weight of the first closing ball 4 and less than the weight of the second closing ball 7, it will push the first closing ball 4 to move. The first closing ball 4, the connecting part 6, and the second closing ball 7 are in a balanced state at this time, which is convenient for the working process of the valve body 1.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new type of low-temperature micro-opening safety valve, characterized by: The invention comprises a valve body (1), wherein the valve body (1) is provided with a water inlet (2) and a water outlet (3), wherein a first closing ball (4) is slidably arranged inside the valve body (1) for closing the water inlet (2), and a first boss (5) is fixed to the inner side wall of the water inlet (2), and the inner side wall of the first closing ball (4) abuts against the end of the first boss (5).

2. The novel low-temperature micro-opening safety valve according to claim 1 is characterized in that: A connecting portion (6) is fixed to the side wall of the first closing ball (4), a second closing ball (7) is fixed to the end of the connecting portion (6), and the diameter of the second closing ball (7) is greater than the diameter of the inner side wall of the first boss (5).

3. The novel low-temperature micro-opening safety valve according to claim 2 is characterized in that: Both ends of the valve body (1) are open, one end of which is detachably connected to a locking portion (8), the water inlet (2) is opened in the locking portion (8) and penetrates the locking portion (8), and the cross-section of the inner wall of the locking portion (8) is a shape composed of a rectangle, a trapezoid, or a rectangle.

4. The novel low-temperature micro-opening safety valve according to claim 3 is characterized in that: The end of the locking portion (8) is detachably connected to a positioning portion (9), the positioning portion (9) is hollow and the diameter of the inner wall of the positioning portion (9) is smaller than the diameter of the second closing ball (7).

5. The novel low-temperature micro-opening safety valve according to claim 1 is characterized in that: A sealing ring (10) is fixed to the end of the first boss (5), and the side wall of the first sealing ball (4) abuts against the sealing ring (10).

6. The novel low-temperature micro-opening safety valve according to claim 3 is characterized in that: A sealing portion (12) is detachably connected to the opening of the valve body (1) away from the locking portion (8), a sealing ring (11) is fixed to the end surface of the sealing portion (12), and the sealing ring (11) abuts against the end of the valve body (1).

7. The novel low-temperature micro-opening safety valve according to claim 2 is characterized in that: The weight of the second closing ball (7) is greater than the weight of the first closing ball (4).

8. The novel low-temperature micro-opening safety valve according to claim 2 is characterized in that: The connecting part (6) is made of flexible material.

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