A high pressure low temperature ball valve

Abstract

The utility model discloses a high-pressure and low-temperature ball valve, comprising a valve body, a valve ball, a valve stem, and an inlet pipe and an outlet pipe arranged on both sides of the valve body, wherein an opening is arranged above the inlet pipe; and further comprising a connecting pipe detachably connected to the opening, wherein the cross section of the connecting pipe is semi-circular, the outer diameter of the connecting pipe is the same as the inner diameter of the inlet pipe and is adapted to the shape of the opening, a buffer plate and a guide plate are arranged inside the connecting pipe, the cross section of the buffer plate is wavy and a plurality of flow holes are opened thereon, the cross section of the guide plate is cross-shaped and the upper end and both ends are fixedly connected to the inner wall of the connecting pipe, a first clamping groove and a second clamping groove are arranged on the side wall below the opening position of the inlet pipe, the first clamping groove is plug-in matched with the lower end of the buffer plate, and the second clamping groove is plug-in matched with the lower end of the guide plate, which has a better buffering effect, is not easy to accumulate impurities, and is convenient for cleaning.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-pressure and low-temperature ball valve. Background Art

[0002] The ball valve has a 90-degree rotation action. The outer contour of the valve core is a sphere, and there is a circular through hole or channel passing through its axis. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to rotate 90 degrees and a very small torque to close tightly. High-pressure and low-temperature ball valves are mainly used in harsh environments for transmitting low-temperature media such as liquefied natural gas, liquid ethylene, and liquid oxygen.

[0003] When the liquid flows through the low-temperature and high-pressure ball valve, the liquid flow rate is too high and the pressure at the liquid outlet is too high, which may easily cause some dangers. As a prior art, Chinese patent CN212178227U proposes a low-temperature and high-pressure ball valve, which is provided with an eight-shaped buffer plate to slow down the flow rate of the liquid into the water inlet pipe. However, the buffer structure is simple and has limited buffering effect on the liquid. In addition, a gap is formed between the buffer plate and the side wall of the water inlet pipe, which is not only easy to accumulate impurities, but also inconvenient for cleaning the inside of the water inlet pipe. If the impurities are not cleaned up, it is likely to affect the normal operation of the ball valve. Utility Model Content

[0004] The purpose of the utility model is to provide a high-pressure and low-temperature ball valve to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a high-pressure and low-temperature ball valve, comprising a valve body, a valve ball, a valve stem, and an inlet pipe and an outlet pipe arranged on both sides of the valve body, an opening being arranged above the inlet pipe; and also comprising a connecting pipe detachably connected to the opening, the cross-section of the connecting pipe being semi-annular, the outer diameter of the connecting pipe being the same as the inner diameter of the inlet pipe and being adapted to the shape of the opening, a buffer plate and a guide plate being arranged inside the connecting pipe, the cross-section of the buffer plate being wavy and provided with a plurality of flow holes, the cross-section of the guide plate being cross-shaped and the upper end and both ends being fixedly connected to the inner wall of the connecting pipe, the side wall below the inlet pipe at the opening position being provided with a first card slot and a second card slot, the first card slot being plug-fitted with the lower end of the buffer plate, and the second card slot being plug-fitted with the lower end of the guide plate.

[0006] By adopting the above technical solution, after the ball valve is opened, the medium enters from the inlet pipe, and the water flow first impacts the buffer plate. Since the buffer plate is arranged in a wave shape, the impact force of the medium can be dispersed, and then the medium flows through the flow hole to the guide frame. The cross-shaped guide frame can divide the medium into four flow channels for diversion, thereby further weakening the impact force of the medium. The above-mentioned structure has a better buffering effect on the medium than the prior art, and is not easy to accumulate impurities. When impurities need to be cleaned, the connecting pipe can be separated from the inlet pipe and cleaned, and the connecting pipe can be lifted upward. At the same time, the buffer plate is disengaged from the first slot, and the guide frame is disengaged from the second slot to complete the connecting pipe. At this time, the buffer plate, the guide frame and the inside of the inlet pipe can be cleaned, and the operation is convenient and labor-saving.

[0007] As a further optimization of the utility model, the side wall of the guide plate is provided with strip holes along the flow direction of the medium, each strip hole is provided with a spring and a slidable buffer block, and the buffer block is pressed against the inner wall of one end of the strip hole away from the valve ball through the spring.

[0008] By adopting the above technical solution, when the medium flows through the flow hole to the flow guide frame, the medium first contacts the buffer block, and then pushes the buffer block to slide. When sliding, the spring is squeezed, and the spring generates a reverse force, thereby further weakening the impact force on the medium.

[0009] As a further optimization of the utility model, blocking parts perpendicular to the guide plate are provided at both ends of the buffer block, and an arc-shaped buffer groove is provided on the side of the blocking part away from the spring.

[0010] By adopting the above technical solution, the blocking part is provided to increase the contact area with the medium, and the buffer groove is provided to increase the blocking effect on the medium, thereby improving the buffer effect.

[0011] As a further optimization of the utility model, both side walls of the connecting pipe are provided with connecting blocks, the connecting blocks have threaded holes, and both side walls of the inlet pipe at the opening are provided with connecting parts, the connecting parts have threaded grooves, and the connecting blocks and the connecting parts are connected by bolts.

[0012] As a further optimization of the utility model, the side wall and the end face of the connecting pipe are provided with sealing strips.

[0013] By adopting the above technical solution, a sealing strip is provided to improve the sealing performance of the inlet pipe and the connecting pipe during installation.

[0014] As a further optimization of the utility model, a placement box is provided on the top of the connecting pipe, and a cleaning component is provided in the placement box.

[0015] By adopting the above technical solution, when cleaning, the storage box is opened and cleaning tools are used to improve the cleaning efficiency of the staff.

[0016] The beneficial effects of the utility model are as follows: after the ball valve is opened, the medium enters from the inlet pipe, and the water flow first impacts the buffer plate. Since the buffer plate is arranged in a wave shape, the impact force of the medium can be dispersed, and then the medium passes through the flow hole and flows to the guide frame. The cross-shaped guide frame can divide the medium into four flow channels for diversion, thereby further weakening the impact force of the medium. The above-mentioned structure has a better buffering effect on the medium than the prior art, and is not easy to accumulate impurities. When impurities need to be cleaned, the connecting pipe can be separated from the inlet pipe and cleaned, and the connecting pipe can be lifted upward. At the same time, the buffer plate is disengaged from the first slot, and the guide frame is disengaged from the second slot to complete the connecting pipe. At this time, the buffer plate, the guide frame and the inside of the inlet pipe can be cleaned, and the operation is convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 for Figure 2 An enlarged schematic diagram of

[0020] Figure 4 It is a structural schematic diagram of the connecting pipe in the utility model;

[0021] Figure 5 It is a structural schematic diagram of the guide frame in the utility model.

[0022] The meaning of the numbers in the figure are as follows: 1. valve body; 11. inlet pipe; 111. connecting part; 12. outlet pipe; 13. valve stem; 14. valve ball; 15. first slot; 16. second slot; 2. connecting pipe; 21. connecting block; 3. buffer plate; 31. flow hole; 4. guide frame; 41. strip hole; 411. slide groove; 5. spring; 6. buffer block; 61. blocking part; 7. sealing strip; 8. placement box. DETAILED DESCRIPTION

[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0024] See attached Figure 1-5, the embodiment disclosed in the utility model further provides: a high-pressure low-temperature ball valve, comprising a valve body 1, a valve ball 14, a valve stem 13, and an inlet pipe 11 and an outlet pipe 12 arranged on both sides of the valve body 1, and an opening is arranged above the inlet pipe 11;

[0025] It also includes a connecting pipe 2 detachably connected to the opening. Specifically, both side walls of the connecting pipe 2 are provided with connecting blocks 21, and the connecting blocks 21 have threaded holes. Both side walls of the inlet pipe 11 at the opening are provided with connecting parts 111, and the connecting parts 111 have threaded grooves. The connecting blocks 21 and the connecting parts 111 are connected by bolts.

[0026] The cross section of the connecting pipe 2 is semi-circular, and the outer diameter of the connecting pipe 2 is the same as the inner diameter of the inlet pipe 11 and is adapted to the shape of the opening. A buffer plate 3 and a guide plate are provided inside the connecting pipe 2. The cross section of the buffer plate 3 is wavy and is provided with a plurality of flow holes 31. The cross section of the guide plate is in the shape of a "cross" and the upper end and both ends are fixedly connected to the inner wall of the connecting pipe 2. The side wall below the opening position of the inlet pipe 11 is provided with a first card groove 15 and a second card groove 16. The first card groove 15 is plugged in with the lower end of the buffer plate 3, and the second card groove 16 is plugged in with the lower end of the guide plate.

[0027] Furthermore, the side wall of the guide plate is provided with a strip hole 41 along the flow direction of the medium, each strip hole 41 is provided with a spring 5 and a slidable buffer block 6, the side wall of the strip hole 41 is provided with a slide groove 411 along the axial direction, and sliders are provided on both sides of the buffer block 6 and are slidably connected with the slide groove 411, and the buffer block 6 is pressed against the inner wall of one end of the strip hole 41 away from the valve ball 14 through the spring 5, and blocking parts 61 perpendicular to the guide plate are provided at both ends of the buffer block 6, and an arc-shaped buffer groove is provided on the side of the blocking part 61 away from the spring 5;

[0028] Furthermore, the side wall and the end surface of the connecting pipe 2 are provided with sealing strips 7 , and the sealing strips 7 are provided to improve the sealing performance when the inlet pipe 11 and the connecting pipe 2 are installed.

[0029] The principle of the utility model is as follows: after the ball valve is opened, the medium enters from the inlet pipe 11, and the water flow first impacts the buffer plate 3. Since the buffer plate 3 is arranged in a wave shape, the impact force of the medium can be dispersed. Then the medium passes through the flow hole 31 and flows to the flow guide frame 4. The medium first contacts the buffer block 6, and then pushes the buffer block 6 to slide. When sliding, the spring 5 is squeezed, and the spring 5 generates a reverse force, thereby further weakening the impact force of the medium. The cross-shaped flow guide frame 4 can divide the medium into four flow channels for diversion, thereby further weakening the impact force of the medium. The blocking part 61 is set to increase the contact area with the medium, and the buffer groove is set to increase the blocking effect on the medium, thereby improving the buffering effect. Compared with the prior art, the above-mentioned structure has a better buffering effect on the medium and is not easy to accumulate impurities.

[0030] When impurities need to be cleaned, the connecting pipe 2 can be separated from the inlet pipe 11 and then cleaned. The connecting pipe 2 can be lifted upward, and the buffer plate 3 can be removed from the first card slot 15, and the guide frame 4 can be removed from the second card slot 16. The connecting pipe 2 can be cleaned. At this time, the buffer plate 3, the guide frame 4 and the inside of the inlet pipe 11 can be cleaned, which is convenient and labor-saving.

[0031] During cleaning, opening the placement box 8 and using cleaning tools can improve the cleaning efficiency of the staff.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure, low-temperature ball valve, comprising a valve body (1), a valve ball (14), a valve stem (13), and an inlet pipe (11) and an outlet pipe (12) arranged on both sides of the valve body (1), characterized in that: The inlet pipe (11) is provided with an opening at the top; it also includes a connecting pipe (2) detachably connected to the opening, the outer diameter of the connecting pipe (2) being the same as the inner diameter of the inlet pipe (11) and being adapted to the shape of the opening, a buffer plate (3) and a guide plate are provided inside the connecting pipe (2), the buffer plate (3) having a wavy cross section and a plurality of flow holes (31) being provided thereon, the guide plate having a "cross" cross section and the upper end and both ends being fixedly connected to the inner wall of the connecting pipe (2), the inlet pipe (11) having a first clamping groove (15) and a second clamping groove (16) on the side wall below the opening, the first clamping groove (15) being plug-fitted with the lower end of the buffer plate (3), and the second clamping groove (16) being plug-fitted with the lower end of the guide plate.

2. A high-pressure and low-temperature ball valve according to claim 1, characterized in that: The side wall of the guide plate is provided with strip holes (41) along the flow direction of the medium, and each strip hole (41) is provided with a spring (5) and a slidable buffer block (6). The buffer block (6) is pressed against the inner wall of one end of the strip hole (41) away from the valve ball (14) through the spring (5).

3. A high-pressure and low-temperature ball valve according to claim 2, characterized in that: Both ends of the buffer block (6) are provided with blocking portions (61) perpendicular to the guide plate, and a buffer groove is provided on the side of the blocking portion (61) away from the spring (5).

4. A high-pressure and low-temperature ball valve according to claim 1, characterized in that: Both side walls of the connecting pipe (2) are provided with connecting blocks (21), the connecting blocks (21) are provided with threaded holes, both side walls of the inlet pipe (11) at the opening are provided with connecting parts (111), the connecting parts (111) are provided with threaded grooves, and the connecting blocks (21) and the connecting parts (111) are connected by bolts.

5. A high-pressure and low-temperature ball valve according to claim 2, characterized in that: A sliding groove (411) is provided on the side wall of the strip-shaped hole (41) along the axial direction, and sliding blocks are provided on both sides of the buffer block (6) and are slidably connected to the sliding groove (411).

6. A high-pressure and low-temperature ball valve according to claim 1, characterized in that: The side wall and end surface of the connecting pipe (2) are both provided with sealing strips (7).

7. The high-pressure and low-temperature ball valve according to claim 1, characterized in that: A placement box (8) is provided on the top of the connecting pipe (2), and a cleaning component is provided in the placement box (8).

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