High-pressure valve suitable for sand-containing medium and assembling and disassembling method of high-pressure valve

Abstract

The invention discloses a high-pressure valve suitable for a sand-containing medium and an assembling and disassembling method of the high-pressure valve. The high-pressure valve comprises a water inlet valve body, a water drainage valve body, a plug push-pull rod, a push-pull rod sealing filler, a spherical plug, a plug clamping jaw, a sealing ring and a sealing ring seat. In order to overcome the defects that according to a traditional ball valve structure, sand grains in a sand-containing medium rub against the contact portion of a valve body due to rotation of a spherical valve element, the valve body is damaged, or the valve fails due to the fact that the sand grains are clamped into a gap between the valve element and the valve body to clamp the valve element, the service life of the valve can be effectively prolonged, and the service life of the valve is prolonged. The spherical plug and the sealing ring which are easy to wear have low matching precision requirements with other related parts, can adopt universal standard parts in the market, are easy to purchase, low in price, capable of being independently replaced, convenient to disassemble and assemble and extremely convenient in subsequent maintenance and repair, and have popularization and application values.

Description

Technical Field

[0001] This invention relates to the field of high-pressure valve technology, and in particular to a high-pressure valve suitable for sand-containing media and its assembly and disassembly methods. Background Technology

[0002] Currently, in the geological exploration industry, the high-pressure discharge pipe of the mud pump is usually arranged in two lines. One line is connected to a water tap for delivering mud to the bottom of the hole during drilling, and the other line is used to flush out the core from the core tube. The two lines cannot work simultaneously; when one line is open, the other line must be closed. However, due to water supply limitations during geological exploration, returned mud is generally recycled after being treated by a desanding machine. But due to construction efficiency and equipment limitations, the medium still contains a lot of small sand particles. In the medium delivery pipeline, ball valves (such as...) are generally used to... Figure 1 , Figure 2 As shown, the ball valve is controlled to open and close. When the medium passes through the ball valve, the ball valve core (102) is rotated in the inner cavity of the valve body (103) by the handle (101), thereby controlling the opening and closing of the ball valve. When the new valve is in use, due to the medium pressure on the inlet (104) side of the ball valve core (102), when the ball valve core (102) is rotated by the handle (101), minor wear will inevitably occur at the interface between the outer arc surface of the ball valve core (102) and the valve core sealing packing (105). Sand and gravel particles in the medium will concentrate on the ball valve core and the valve body inner cavity sealing packing. At the interface, after the ball valve has been used for a period of time, due to repeated wear, a gap will form at the interface between the outer arc surface of the ball valve core (102) and the sealing packing (105). Sand and gravel will drill into the gap between the ball valve core (102) and the sealing packing (105) as the ball valve core rotates, affecting the seal. At the same time, more and more sand and gravel will drill into the ball valve core and the sealing packing, eventually causing the valve core to jam and the ball valve to fail. Since the matching accuracy requirements between the inner hole of the ball valve core and the cavities in the valve body on both sides are high, when the valve core jams, the entire ball valve must be replaced, which is costly and inefficient. Summary of the Invention

[0003] This invention addresses the problems mentioned in the background art by providing a high-pressure valve suitable for sandy media. It can effectively prevent valve failure caused by long-term friction of sand particles in the sandy media against the valve core. The consumable parts are highly independent and can be replaced individually, resulting in low maintenance costs and high efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high-pressure valve suitable for sand-containing media, characterized by comprising an inlet valve body, a drain valve body, a plug push-pull rod, a push-pull rod sealing packing, a spherical plug, a plug claw, a sealing ring, and a sealing ring seat; The water inlet valve body has a tubular inner cavity with a water inlet and a drain outlet at both ends. The water inlet is connected to the medium input end, and the drain outlet at the other end is connected to the drain valve body. A sealing ring seat is provided at the connection between the water inlet valve body and the drain valve body. The sealing ring seat is tubular, with external threads at both the upper and lower ends. The drain valve body and the inlet valve body are detachably connected as one unit through the external threads at both ends of the sealing ring seat. A stepped surface is provided on the inner side of the port where the sealing ring seat connects to the drain valve body. The sealing ring is a hard alloy sealing ring, which is clamped onto the stepped surface of the sealing ring seat. The drain valve body is a T-shaped three-way pipe, including an upper installation port, a lower connection port opposite to the upper port, and a drain interface set on the side wall. The upper installation port is provided with a plug push-pull rod and a push-pull rod sealing packing. The lower connection port is connected to the external thread of the upper end of the sealing ring seat. The drain interface is connected to the medium discharge end. The outer wall of the plug push-pull rod is provided with an external thread of a certain length according to its required advance stroke length. The plug push-pull rod passes through the push-pull rod sealing packing and extends into the inner cavity of the drain valve body. The outer end of the plug push-pull rod is provided with a handle, which is fixedly connected to the plug push-pull rod and used to control the plug push-pull rod to advance and retract axially using thread transmission. One end of the plug push-pull rod in the inner cavity of the drain valve body is provided with a plug claw. The plug claw is a sleeve shape with one open end and one closed end. The center of the outer surface of the closed end is fixedly connected to the plug push-pull rod. The side wall of the plug claw has several U-shaped hollows with a width smaller than the diameter of the spherical plug evenly distributed radially. The spherical plug is placed on the sealing ring in the inner cavity of the drain valve body between the plug claw and the sealing ring. The diameter of the spherical plug is larger than the inner diameter of the sealing ring seat, which restricts it from falling through the sealing ring seat into the inner cavity of the water inlet valve body. The plug claw restricts it from being flushed out of the drain interface. The inner hole of the push-pull rod sealing filler that contacts the rod wall of the plug push-pull rod is provided with an internal thread that mates with the external thread on the rod wall of the plug push-pull rod; When the handle of the plug push-pull rod is rotated forward, the plug push-pull rod, through the threaded engagement with the push-pull rod sealing packing, pushes the plug claws to press the spherical plug onto the sealing ring, thus closing the valve. When the handle of the plug push-pull rod is rotated backward, the plug push-pull rod drives the plug claws to retract. When the medium pressure is greater than the weight of the spherical plug, the spherical plug is forced open. At this time, the medium enters the drain valve body through the gap between the spherical plug and the body cavity of the drain valve body and the U-shaped hollow notch on the plug claws, and is then discharged through the drain port, thus opening the valve.

[0005] A further aspect of the present invention is that the preferred range of the inner cavity height of the plug claw is: greater than or equal to the height of the center of the spherical plug placed therein, and less than two-thirds of the diameter of the spherical plug. When the valve is opened, the plug claw with this cavity height can restrict the spherical plug to remain inside the plug claw and not fall out. At the same time, when the valve is closed, it can ensure that the spherical plug is completely pressed and covered on the sealing ring.

[0006] A further aspect of this invention is: it also includes the above-mentioned method for installing and removing the high-pressure valve, characterized in that: first, the sealing ring seat with the sealing ring installed is installed on the drain port of the inlet valve body; the spherical plug is placed on the inner hole of the sealing ring; then, the lower end connection port of the drain valve body is installed on the other end of the sealing ring seat and fixed by threaded connection; then, the end of the plug push rod with the plug claw is inserted into the inner cavity of the inlet valve body from the upper end installation port of the inlet valve body, ensuring that the plug claw is fitted on the spherical plug; then, the push rod sealing filler is fitted onto the plug push rod and rotated into place by thread; a handle is installed on the outer end of the plug push rod; finally, the medium input pipe and output pipe are installed on the inlet of the inlet valve body and the drain port of the drain valve body respectively to complete the installation; The steps for disassembling and replacing the easily worn spherical plug and sealing ring are as follows: remove the medium input pipe on the inlet of the water inlet valve body, the water inlet valve body, and the sealing ring seat in sequence. Then, remove the spherical plug and sealing ring for replacement. Select a replacement part of the appropriate size and replace it directly. Then, reinstall the sealing ring seat, the water inlet valve body, and the medium input pipe in sequence to complete the replacement of the worn parts.

[0007] The beneficial effects of this invention are: addressing the shortcomings of traditional ball valve structures, such as sand particles in sandy media rubbing against the valve body due to the rotation of the spherical valve core, damaging the valve body, or getting stuck in the gap between the valve core and the valve body, causing valve failure, this invention can very effectively improve the service life of the valve. The easily worn spherical plug and sealing ring have low matching accuracy requirements with other related components, can use commonly available standard parts, are easy to purchase, inexpensive, can be replaced independently, and are easy to disassemble and assemble, making subsequent maintenance and repair extremely convenient, and has promotional application value. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the existing ball valve in the open state. Figure 2 This is a schematic diagram of the existing ball valve in the closed state. Figure 3 This is a schematic diagram of the open state structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the closed state structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the plug claw structure according to an embodiment of the present invention. Detailed Implementation

[0009] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example

[0010] like Figure 3 As shown, a high-pressure valve suitable for sandy media includes an inlet valve body 1, a drain valve body 2, a plug push-pull rod 3, a push-pull rod sealing packing 4, a spherical plug 5, a plug claw 6, a sealing ring 7, and a sealing ring seat 8. The water inlet valve body 1 has a tubular inner cavity, with a water inlet 11 and a drain outlet at the two ends of the inner cavity, respectively. The water inlet 11 is connected to the medium input end, and the drain outlet at the other end is connected to the drain valve body 2. A sealing ring seat 8 is provided at the connection between the water inlet valve body 1 and the drain valve body 2. The sealing ring seat 8 is tubular, and the upper and lower ends of the sealing ring seat 8 are respectively provided with external threads. The drain valve body 2 and the inlet valve body 1 are detachably connected to each other through the external threads at both ends of the sealing ring seat 8. The inner side of the port where the sealing ring seat 8 connects to the drain valve body 2 is provided with a stepped surface. The sealing ring 7 is a hard alloy sealing ring, which is clamped on the stepped surface of the sealing ring seat 8. The drain valve body 2 is a T-shaped three-way pipe, including an upper mounting port 21, a lower connecting port 22 opposite to the upper port 21, and a drain interface 23 set on the side wall. The upper mounting port 21 is provided with a plug push-pull rod 3 and a push-pull rod sealing filler 4. The lower connecting port 22 is connected to the external thread of the upper end of the sealing ring seat 8. The drain interface 23 is connected to the medium discharge end. The outer wall of the plug push-pull rod 3 is provided with an external thread of a certain length according to its required pushing stroke length. The plug push-pull rod 3 passes through the push-pull rod sealing packing 4 and extends into the inner cavity of the drain valve body 2. The outer end of the plug push-pull rod 3 is provided with a handle 31. The handle 31 is fixedly connected to the plug push-pull rod 3 and is used to control the plug push-pull rod 3 to push forward and retract axially by means of thread transmission. One end of the plug push-pull rod 3 in the inner cavity of the drain valve body 2 is provided with a plug claw 6. The plug claw 6 is a sleeve shape with one end open and one end closed. The center of the outer surface of the closed end is fixedly connected to the plug push-pull rod 3. The side wall of the plug claw 6 has several U-shaped hollows with a width smaller than the diameter of the spherical plug 5 evenly distributed radially. The spherical plug 5 is placed on the sealing ring 7 in the inner cavity of the drain valve body 2 between the plug claw 6 and the sealing ring seat 8. The diameter of the spherical plug 5 is larger than the inner diameter of the sealing ring seat 7, which restricts it from falling through the sealing ring seat 7 into the inner cavity of the water inlet valve body 1. The plug claw 6 restricts it from being flushed out from the drain port 23. The inner hole of the push-pull rod sealing filler 4 that contacts the wall of the plug push-pull rod 3 is provided with an internal thread that mates with the external thread on the wall of the plug push-pull rod 3; When the handle 31 of the plug push-pull rod 3 is rotated forward, the plug push-pull rod 3 is pushed forward by the thread engagement with the push-pull rod sealing packing 4, which drives the plug claw 6 to press the spherical plug 5 onto the sealing ring 7, thus closing the valve. When the handle 31 of the plug push-pull rod 3 is rotated backward, the plug push-pull rod 3 drives the plug claw 6 to retract. When the medium pressure is greater than the weight of the spherical plug 5, the spherical plug 5 is pushed open. At this time, the medium enters the inner cavity of the drain valve body 2 through the gap between the spherical plug 5 and the inner cavity of the drain valve body 2 and the U-shaped hollow notch on the plug claw 6, and is then discharged through the drain interface 23, thus opening the valve.

[0011] The preferred range of the inner cavity height of the plug claw 6 is greater than or equal to the center height of the spherical plug 5 placed therein, and less than two-thirds of the diameter of the spherical plug 5. When the valve is opened, the plug claw 6 with this cavity height can prevent the spherical plug 5 from falling out of the plug claw 6, and at the same time, when the valve is closed, it can ensure that the spherical plug 5 is completely pressed and covered on the sealing ring 7.

Claims

1. A high-pressure valve suitable for sand-containing media, characterized in that: Includes inlet valve body, drain valve body, plug push-pull rod, push-pull rod sealing packing, spherical plug, plug claw, sealing ring and sealing ring seat; The water inlet valve body has a tubular inner cavity with a water inlet and a drain outlet at both ends. The water inlet is connected to the medium input end, and the drain outlet at the other end is connected to the drain valve body. A sealing ring seat is provided at the connection between the water inlet valve body and the drain valve body. The sealing ring seat is tubular, with external threads at both the upper and lower ends. The drain valve body and the inlet valve body are detachably connected as one unit through the external threads at both ends of the sealing ring seat. A stepped surface is provided on the inner side of the port where the sealing ring seat connects to the drain valve body. The sealing ring is a hard alloy sealing ring, which is clamped onto the stepped surface of the sealing ring seat. The drain valve body is a T-shaped three-way pipe, including an upper installation port, a lower connection port opposite to the upper port, and a drain interface set on the side wall. The upper installation port is provided with a plug push-pull rod and a push-pull rod sealing packing. The lower connection port is connected to the external thread of the upper end of the sealing ring seat. The drain interface is connected to the medium discharge end. The outer wall of the plug push-pull rod is provided with an external thread of a certain length according to its required advance stroke length. The plug push-pull rod passes through the push-pull rod sealing packing and extends into the inner cavity of the drain valve body. The outer end of the plug push-pull rod is provided with a handle, which is fixedly connected to the plug push-pull rod and used to control the plug push-pull rod to advance and retract axially using thread transmission. One end of the plug push-pull rod in the inner cavity of the drain valve body is provided with a plug claw. The plug claw is a sleeve shape with one open end and one closed end. The center of the outer surface of the closed end is fixedly connected to the plug push-pull rod. The side wall of the plug claw has several U-shaped hollows with a width smaller than the diameter of the spherical plug evenly distributed radially. The spherical plug is placed on the sealing ring in the inner cavity of the drain valve body between the plug claw and the sealing ring. The diameter of the spherical plug is larger than the inner diameter of the sealing ring seat, which restricts it from falling through the sealing ring seat into the inner cavity of the water inlet valve body. The plug claw restricts it from being flushed out of the drain interface. The inner hole of the push-pull rod sealing filler that contacts the rod wall of the plug push-pull rod is provided with an internal thread that mates with the external thread on the rod wall of the plug push-pull rod; When the handle of the plug push-pull rod is rotated forward, the plug push-pull rod, through the threaded engagement with the push-pull rod sealing packing, pushes the plug claws to press the spherical plug onto the sealing ring, thus closing the valve. When the handle of the plug push-pull rod is rotated backward, the plug push-pull rod drives the plug claws to retract. When the medium pressure is greater than the weight of the spherical plug, the spherical plug is forced open. At this time, the medium enters the drain valve body through the gap between the spherical plug and the body cavity of the drain valve body and the U-shaped hollow notch on the plug claws, and is then discharged through the drain port, thus opening the valve.

2. A high-pressure valve suitable for sand-containing media as described in claim 1, characterized in that... The preferred range for the inner cavity height of the plug claw is: greater than or equal to the height of the center of the spherical plug placed therein, and less than two-thirds of the diameter of the spherical plug.

3. A method for assembling and disassembling a high-pressure valve as described in claims 1-2, characterized in that: First, install the sealing ring seat with the sealing ring installed on the drain port of the inlet valve body. Place the spherical plug on the inner hole of the sealing ring. Then, install the lower end connection port of the drain valve body on the other end of the sealing ring seat and fix it with threads. Next, insert the end of the plug push rod with the plug claw into the inner cavity of the inlet valve body from the upper installation port of the inlet valve body, ensuring that the plug claw is fitted on the spherical plug. Then, fit the push rod sealing filler onto the plug push rod and rotate it into place with threads. Install the handle on the outer end of the plug push rod. Finally, install the medium input pipe and output pipe on the inlet of the inlet valve body and the drain port of the drain valve body, respectively, to complete the installation. The steps for disassembling and replacing the ball plug and sealing ring are as follows: first, remove the medium input pipe on the inlet of the water inlet valve body, then remove the water inlet valve body and the sealing ring seat to take out the ball plug and sealing ring for replacement. After replacing with a suitable replacement part, reassemble the sealing ring seat, the water inlet valve body and the medium input pipe in sequence to complete the replacement of the worn parts.

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