A high-pressure globe valve that is easy to operate manually

Abstract

The application discloses a high-pressure spherical stop valve convenient for manual operation and relates to the technical field of valves.The high-pressure spherical stop valve comprises a valve body, a valve rod, an annular flange, rollers, a wrench and a retaining assembly, the valve body is provided with a valve rod hole and an annular limiting structure, the annular flange is arranged on the side surface of the valve rod, and a plurality of rollers are arranged between the annular flange and the annular limiting structure, so that the connection mode between the annular flange and the annular limiting structure is changed from sliding friction to rolling friction, and the rotating resistance of the valve rod under high-pressure working conditions is significantly reduced; the wrench is provided with a locking pin and the retaining assembly; and the retaining assembly can keep the locking pin in an inserted locking state or a pulled-out retaining state.The high-pressure spherical stop valve not only solves the problems that the spherical stop valve is difficult to open and close under high-pressure working conditions, but also realizes convenient operation of a single person, avoids invalid wear of the locking pin and the valve body, improves the service life and safety of the stop valve under harsh working conditions, solves the problems that the valve is opened or closed by mistake, and protects a hydraulic system.

Description

Technical Field

[0001] This invention relates primarily to the field of valve technology, specifically to a high-pressure ball stop valve that is easy to operate manually. Background Technology

[0002] A spherical gate valve has a spherical opening and closing element. When fluid flows through, the rotation of the spherical opening and closing element effectively controls the flow rate. The main components of a spherical gate valve include the valve body, the spherical valve core, the valve stem, and the sealing assembly. The design of the spherical gate valve isolates the sealing surfaces of the spherical valve core and the valve seat from the medium when fully open or fully closed, preventing the medium from corroding the sealing surfaces.

[0003] Among them, the Class A ball gate valve is a high-performance valve with low leakage and flow regulation capability, which is widely used in high-pressure fluid control fields such as mining machinery.

[0004] Under high pressure conditions, the valve stem is subjected to a very large axial thrust. The existing spherical gate valve usually has a surface-to-surface sliding contact between the valve stem and the axial limiting structure of the valve body. This results in a very large sliding friction resistance between the valve stem and the axial limiting structure of the valve body, making it difficult to rotate the valve stem. Often, it requires two hands or even multiple people to operate.

[0005] Furthermore, since the application environment and the mining machinery itself are usually accompanied by a lot of noise and vibration during operation, in order to prevent the valve core and valve stem of the ball gate valve from rotating unexpectedly due to mechanical vibration, it is necessary to lock the operating parts connected to the valve stem, such as the wrench. At the same time, it is necessary to prevent the wrench locking structure from failing under long-term mechanical vibration.

[0006] Currently, existing technologies include a method of locking the wrench by inserting a pin on the wrench into a socket on the valve body, and using a spring to apply a pushing force to the pin to prevent the pin from accidentally falling off.

[0007] However, before turning the wrench, not only must the spring resistance be overcome to pull it out, but the spring must also be kept pulled out during the turning process, making it impossible for a single person to turn the wrench with full force using both hands. Furthermore, after the wrench is turned, if the pin is released, it will not only cause the pin to rub and scrape against the valve body, causing the pin to deform and bend, and damaging the protective layer on the valve body surface, but more importantly, it will further increase the turning resistance of the wrench, making it difficult to exert force when a single person encounters difficulties turning it.

[0008] Therefore, there is an urgent need for a high-pressure ball valve that can reduce the high-pressure operating resistance of the ball valve and enable convenient locking and unlocking. Summary of the Invention

[0009] The present invention addresses the problem that existing technical solutions are too simplistic by providing a solution that is significantly different from existing technologies. It mainly provides a high-pressure ball shut-off valve that is easy to operate manually, thereby solving the technical problems mentioned in the background.

[0010] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A high-pressure ball stop valve that is easy to operate manually includes a valve body and a valve stem. The valve body has a valve stem hole for inserting the valve stem, one end of which communicates with a fluid passage inside the valve body. The valve body also includes: An annular flange is arranged around the side of the valve stem and located inside the valve stem hole. The valve body is provided with an annular limiting structure opposite to the annular flange, and the annular flange is located between the annular limiting structure and the fluid channel. Rollers are used to roll the annular flange to the annular limiting structure, and multiple rollers are arranged around the rotation axis of the valve stem. A wrench, one end of which is connected to the valve stem, has a locking pin inserted into it through a pin hole. The valve body has two locking holes corresponding to the closed and open states of the ball valve, respectively. The locking pin locks the wrench and the valve stem by inserting it into the locking holes. A retaining component, disposed on the wrench and connected to the locking pin, is used to retain the locking pin in an inserted and withdrawn state relative to the locking hole.

[0011] Furthermore, the valve stem sidewall and the bottom of the annular limiting structure near the fluid channel are provided with annular limiting grooves, and the groove wall of the limiting groove on the valve stem extends to the top of the annular flange, and the multiple rollers are restricted in the annular area located between the annular flange and the two limiting grooves.

[0012] Furthermore, the roller is spherical.

[0013] Furthermore, a sealing groove is provided above and / or below the roller, the sealing groove is located on the side wall of the valve stem and / or the inner wall of the valve stem hole, and a first sealing ring is provided in the sealing groove.

[0014] Furthermore, the valve stem orifice includes a lower orifice near the fluid passage and an upper orifice away from the fluid passage; The valve body includes a valve shell having a fluid passage, a lower channel and a threaded hole, and an externally threaded cylinder having an upper channel. The outer wall of the externally threaded cylinder has an external thread that mates with the threaded hole. The diameter of the upper channel is smaller than that of the lower channel, so that the external threaded cylinder forms the annular limiting structure.

[0015] Furthermore, the inner wall of the lower end of the external threaded cylinder is provided with an annular inclined surface extending to the limiting groove. A deformation reserve area is formed between the annular inclined surface and the side wall of the valve stem, which provides space allowance for the deformation of the external threaded cylinder caused by the rolling pressure.

[0016] Furthermore, the diameter of the annular inclined plane gradually increases in the direction approaching the fluid channel.

[0017] Furthermore, the external threaded cylinder is located inside the threaded hole, and a countersunk hole is provided at the upper end of the external threaded cylinder away from the fluid channel.

[0018] Furthermore, the lower end of the external threaded cylinder of the valve body contacts the end wall of the threaded hole, and a second sealing ring is provided between the outer wall of the external threaded cylinder and the wall of the threaded hole.

[0019] Furthermore, the lower end of the external threaded cylinder has a stepped structure, and the lower end of the stepped structure is tapered with an outer diameter that gradually decreases in the direction close to the fluid channel. A sealing cavity for the second sealing ring to be inserted is formed between the lower end of the external threaded cylinder and the wall of the threaded hole.

[0020] Furthermore, the retaining assembly includes a hollow guide rod, a spring, and an end cap. The lower end of the hollow guide rod is disposed on the wrench. The locking pin is inserted into the hollow guide rod and the pin hole and is rotatable in the pin hole and the hollow guide rod. The locking pin passes through the pin hole and is connected to the end of the hollow guide rod. The end of the end connected to the locking pin is provided with a protrusion. The height of the protrusion is not less than the depth of the locking pin inserted into the locking hole. The top of the hollow guide rod is provided with a protrusion groove for the protrusion to be inserted. The hollow guide rod has an annular groove on its inner wall for inserting a spring. A spring seat is provided in the annular groove and is connected to the spring by being sleeved on the locking pin. After the locking hole alignment protrusion and the protrusion groove are aligned, the locking pin is pushed by the spring and inserted into the locking hole.

[0021] Furthermore, the wrench includes a handle and a frustum with a pin hole, the frustum being connected to the valve stem, the hollow guide rod being disposed on the frustum, one end of the handle being connected to the frustum and away from the valve stem, the valve housing having an annular plane that is clearance-fitted with the frustum, and the locking hole being located at the annular plane.

[0022] Furthermore, at least two of the handles are arranged in a circumferentially uniform array around the valve stem.

[0023] Furthermore, the side of the truncated cone is provided with an arc-shaped groove, and the valve body is provided with a limiting pin that is inserted into the arc-shaped groove. When the limiting pin moves to the end position at both ends of the arc-shaped groove, the locking pin is aligned with the two locking holes respectively.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a roller between the annular flange of the valve stem and the annular limiting structure of the valve body. When the high-pressure fluid pushes the valve stem outward, the roller transforms the original sliding friction into rolling friction, effectively reducing the rotational resistance of the valve stem and solving the problem of the wrench connected to the valve stem being difficult to rotate under high-pressure conditions. 2. The present invention provides a retaining assembly on the wrench consisting of a spring, an end, a protrusion, and a hollow guide rod with a protrusion groove on the top. The operator only needs to pull out the locking pin and rotate it, and the protrusion will be locked on the top of the hollow guide rod, keeping the locking pin in the pulled-out state. This frees up one of the operator's hands, allowing them to hold the wrench with both hands and rotate the valve rod with full force. It is especially suitable for the first opening after high pressure tightening. 3. The retaining component of the present invention can ensure that the locking pin is completely disengaged from the valve body during rotation, avoiding friction and scratching between the bottom of the locking pin and the surface of the valve body, protecting the oxide layer or paint layer on the surface of the valve body, preventing oxidation and corrosion of the valve body, and also avoiding additional rotational resistance due to scratching. 4. The present invention provides a deformation reserve area on the inner wall of the lower end of the external threaded cylinder. When the external threaded cylinder undergoes slight deformation due to the high pressure transmitted by the roller, the reserve area provides space to prevent the valve stem from being squeezed by the inner wall of the external threaded cylinder, thus preventing the valve stem from locking up. 5. The valve body of the present invention adopts a split structure combining a valve shell and an external threaded cylinder. The tapered structure at the lower end of the external threaded cylinder forms a sealing cavity with the bottom of the threaded hole. When the external threaded cylinder is tightened, the second sealing ring can be squeezed, achieving an interference fit and improving the sealing reliability under high pressure.

[0025] 6. The truncated cone at one end of the wrench of the present invention is fitted with the annular plane on the valve body with a clearance, which not only blocks the locking hole, but also prevents gravel and other debris from getting stuck in the bottom of the wrench, making it suitable for harsh working environments such as mines.

[0026] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention; Figure 2 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention; Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of region A in (where the first sealing ring is located on the outer wall of the valve stem); Figure 6 This is a schematic diagram of the first sealing ring of the present invention disposed on the inner wall of the externally threaded cylinder; Figure 7 This is a schematic diagram of the structure of the retaining component of the present invention; Figure 8 This is a schematic diagram of the protrusion structure of the present invention; Figure 9 This is a schematic diagram of the valve body according to the first embodiment of the present invention; Figure 10 This is a schematic diagram of the external threaded cylinder of the present invention; Figure 11 This is a schematic diagram of the annular inclined plane of the present invention.

[0028] Numbering on the map: 1. Valve body; 2. Valve stem; 3. Valve stem bore; 4. Fluid passage; 5. Annular flange; 6. Annular limiting structure; 7. Roller; 8. Wrench; 9. Locking pin; 10. Locking hole; 11. Retaining assembly; 12. Limiting groove; 13. Sealing groove; 14. First sealing ring; 15. Threaded hole; 16. Annular bevel; 17. Deformation reserved area; 18. Countersunk hole; 19. Second sealing ring; 20. Sealing cavity; 21. Limiting pin; 22. Protrusion groove; 23. Arc groove; 101. Valve housing; 102. Externally threaded cylinder; 301. Lower channel; 302. Upper channel; 801. Handle; 802. Frustum; 1101. Hollow guide rod; 1102. Spring; 1103. End; 1104. Protrusion; 1105. Spring seat. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Please refer to the appendix carefully. Figure 1-11A high-pressure ball stop valve that is easy to operate manually includes a valve body 1 and a valve stem 2. The valve body 1 is provided with a valve stem hole 3 for the valve stem 2 to be inserted into. One end of the valve stem hole 3 is connected to a fluid passage 4 inside the valve body 1. The valve body 1 also includes: An annular flange 5 is arranged around the side of the valve stem 2 and located inside the valve stem hole 3. The valve body 1 is provided with an annular limiting structure 6 that is directly opposite to the annular flange 5. The annular flange 5 is located between the annular limiting structure 6 and the fluid channel 4 to prevent the valve stem 2 from being pushed out of the valve stem hole 3 under the action of fluid pressure in the fluid channel 4.

[0032] Rollers 7 roll to connect the annular flange 5 and the annular limiting structure 6. Multiple rollers 7 are arranged around the rotation axis of the valve stem 2. Compared with the sliding connection where the annular flange 5 and the annular limiting structure 6 are in direct contact, the rolling connection between the annular flange 5 and the annular limiting structure 6 by rollers 7 can reduce the frictional resistance between the two. Especially when the fluid channel 4 is filled with high pressure fluid, it can effectively reduce the rotational resistance of the valve stem 2, thus facilitating manual operation.

[0033] The wrench 8 is connected to the valve stem 2 at one end. A locking pin 9 is inserted into the wrench 8 through a pin hole. The valve body 1 is provided with two locking holes 10 corresponding to the closed and open states of the ball stop valve, respectively. The locking pin 9 locks the wrench 8 and the valve stem 2 by inserting into the locking holes 10.

[0034] When the locking pin 9 is inserted into the two locking holes 10, it corresponds to the closed and open states of the ball valve, respectively, thus maintaining the closed and open states of the ball valve. Especially when applied to mining equipment, it can effectively prevent the ball valve from becoming unstable or undergoing unexpected changes in state due to long-term large-amplitude mechanical vibration and high-pressure fluid impact on the valve core, thereby avoiding accidents caused by the instability or unexpected changes in the state of the ball valve. A retaining component 11, mounted on the wrench 8 and connected to the locking pin 9, is used to maintain the locking pin 9 in both the insertion and withdrawal states of the locking pin 9 from the locking hole 10. Specifically, after the locking pin 9 is withdrawn from and inserted into the locking hole 10, the retaining component 11 keeps the relative position of the locking pin 9 with respect to the wrench 8 unchanged. After being withdrawn from the locking hole 10, the locking pin 9 completely disengages from the valve body 1, preventing friction and scratching between the bottom of the locking pin 9 and the valve body 1. This avoids damage to protective layers such as oxide layers and paint layers on the surface of the valve body 1, which could lead to easy oxidation and corrosion. This extends the service life of both the locking pin 9 and the valve body 1, especially when the ball valve is used in mining equipment in harsh environments. Furthermore, it prevents increased rotational resistance of the wrench 8 due to friction and scratching between the locking pin 9 and the valve body 1 when turning the wrench 8.

[0035] In summary, this invention, by setting a roller 7 between the annular flange 5 of the valve stem 2 and the annular limiting structure 6 of the valve body 1, utilizes rolling friction to replace traditional sliding friction, greatly reducing the opening and closing torque of the valve under high-pressure conditions. Combined with the locking mechanism of the wrench 8 with the retaining component 11, it not only achieves rapid positioning and anti-dislodgement of the locking pin 9, but also supports free switching between the insertion and withdrawal states of the locking pin 9. This solves the operational problem of the valve stem 2 being difficult to rotate under high-pressure conditions, and eliminates the drawbacks of the existing wrench 8 locking method, such as inconvenience in operation and easy damage to the valve body 1, thereby improving the operational convenience, safety, and service life of the high-pressure ball stop valve.

[0036] The roller 7 can be, but is not limited to, spherical, cylindrical, or drum-shaped rolling elements, and the shape of the limiting groove 12 is adapted to the external features of the roller 7. However, preferably, the roller 7 is spherical. This is because when the valve core applies pressure to the valve stem 2 under the action of high-pressure fluid, the limiting groove 12 on the valve stem 2 is located on the side of the valve stem 2. The limiting groove 12 of the valve stem 2 and the annular limiting structure 6 are adapted to the arc-shaped cross-section of the spherical roller 7. This allows the roller 7 to decompose the axial compressive force into a radial component applied to the side of the valve stem 2 and an axial component applied to the annular limiting structure 6 when it is squeezed by the annular flange 5. The circular roller 7 can better achieve uniform decomposition of the compressive force, and the axial contact surface and the radial contact surface are consistent or tend to be consistent, which is beneficial to the rolling of the roller 7.

[0037] It should be noted that although the above embodiments do not reduce the rolling resistance of the roller 7, the compressive force of the annular flange 5 is distributed to the annular limiting structure 6 and the valve stem 2, which can reduce the axial pressure on the annular limiting structure 6 and help prevent the annular limiting structure 6 from deforming and cracking under high pressure conditions.

[0038] Annular limiting grooves 12 are provided on the side wall of valve stem 2 and at the bottom of the annular limiting structure 6 near the fluid channel 4. The groove wall of the limiting groove 12 on valve stem 2 extends to the top of the annular flange 5. Multiple rollers 7 are restricted in the annular area between the annular flange 5 and the two limiting grooves 12. The axes of multiple rollers 7 in the annular area are always located on the same circle, so as to avoid the valve stem 2 tilting or tilting tendency due to the different distances of multiple rollers 7 from the axis of valve stem 2, which would increase the rotation resistance of valve stem 2 and cause uneven wear, affecting operation and service life of valve stem 2.

[0039] A sealing groove 13 is provided above and / or below the roller 7. The sealing groove 13 is located on the side wall of the valve stem 2 and / or the inner wall of the valve stem hole 3. A first sealing ring 14 is provided in the sealing groove 13. The first sealing ring 14 is used to maintain the seal between the valve stem 2 and the hole wall of the valve stem hole 3. The specific installation position of the first sealing ring 14 can be determined according to the actual production and use needs.

[0040] like Figure 3 As shown, in Embodiment 1 of this application, the annular limiting structure 6 is directly formed on the wall of the valve stem hole 3, and the valve stem 2 is inserted into the valve stem hole 3 through the fluid channel 4. This embodiment is applicable when the inner diameter of the fluid channel 4 is greater than the length of the valve stem 2.

[0041] like Figure 4 As shown, in the case where the length of the valve stem 2 is greater than the inner diameter of the fluid channel 4, in the second embodiment of this application, the valve stem hole 3 includes a lower channel 301 close to the fluid channel 4 and an upper channel 302 far from the fluid channel 4. The valve body 1 includes a valve shell 101 with a fluid passage 4, a lower passage 301 and a threaded hole 15, and an external threaded cylinder 102 with an upper passage 302. The outer wall of the external threaded cylinder 102 is provided with an external thread that mates with the threaded hole 15. The diameter of the upper channel 302 is smaller than the diameter of the lower channel 301, so that the external threaded cylinder 102 forms an annular limiting structure 6.

[0042] The inner diameter of the external threaded cylinder 102, or the diameter of the upper channel 302, is smaller than the diameter of the lower channel 301 on the valve body 101. The external threaded cylinder 102 is installed into the threaded hole 15, so that the external threaded cylinder 102 forms an annular limiting structure 6. More specifically, the inner layer of the external threaded cylinder 102 forms an annular limiting structure 6.

[0043] An annular inclined surface 16 extending to the limiting groove 12 is provided on the inner wall of the lower end of the external threaded cylinder 102. A deformation reserve area 17 is formed between the annular inclined surface 16 and the side wall of the valve stem 2. This area provides space for the deformation of the external threaded cylinder 102 caused by the compression of the roller 7, and avoids the inner side of the external threaded cylinder 102 from squeezing the valve stem 2 during deformation, which would make it difficult for the valve stem 2 to rotate or even lock it.

[0044] The diameter of the annular inclined surface 16 gradually increases in the direction close to the fluid channel 4. While forming a larger deformation reserved area 17, it is easier to process than a stepped structure. There is only one deformation surface, which facilitates the calculation and control of the deformation position. In addition, the cross-section of the annular inclined surface 16 is triangular, making the structure more stable and with stronger pressure resistance.

[0045] The external threaded cylinder 102 is located inside the threaded hole 15. The upper end of the external threaded cylinder 102 away from the fluid passage 4 is provided with a countersunk hole 18. The external threaded cylinder 102 is located inside the valve stem hole 3, which helps to shorten the required length of the valve stem 2 exposed in the valve body 1 and helps to prevent the valve stem 2 from bending under heavy operation. The countersunk hole 18 is used to connect the tool used to rotate the external threaded cylinder 102.

[0046] The lower end of the external threaded cylinder 102 of the valve body 1 contacts the end wall of the threaded hole 15, and a second sealing ring 19 is provided between the outer wall of the external threaded cylinder 102 and the wall of the threaded hole 15 to prevent high-pressure fluid from seeping out through the gap between the external threaded cylinder 102 and the threaded hole 15.

[0047] The lower end of the external threaded cylinder 102 has a stepped structure, and the lower end of the stepped structure is tapered with an outer diameter that gradually decreases in the direction close to the fluid channel 4. This forms a sealing cavity 20 between the lower end of the external threaded cylinder 102 and the wall of the threaded hole 15 for the second sealing ring 19 to be inserted. When installing the second sealing ring 19, it is simply inserted into the bottom of the threaded hole 15. In addition to facilitating the insertion of the second sealing ring 19, after the external threaded cylinder 102 is installed, it can compress the second sealing ring 19, so that the second sealing ring 19 is interference-fitted into the sealing cavity 20, thereby improving the sealing effect of the second sealing ring 19. This is especially suitable for sealing between the valve stem 2 and the valve body 1 under high pressure conditions.

[0048] The retaining assembly 11 includes a hollow guide rod 1101, a spring 1102, and an end 1103. The lower end of the hollow guide rod 1101 is mounted on the wrench 8. The locking pin 9 is inserted into the hollow guide rod 1101 and the pin hole, and can rotate in the pin hole and the hollow guide rod 1101. The locking pin 9 passes through the pin hole and one end of the hollow guide rod 1101 and is connected to the end head 1103. The end of the end head 1103 connected to the locking pin 9 is provided with a protrusion 1104. The height of the protrusion 1104 is not less than the depth of the locking pin 9 inserted into the locking hole 10. The top of the hollow guide rod 1101 is provided with a protrusion groove 22 for the protrusion 1104 to be inserted. The inner wall of the hollow guide rod 1101 is provided with an annular groove for the spring 1102 to be inserted. A spring seat 1105, which is sleeved on the locking pin 9 and connected to the spring 1102, is provided in the annular groove. After the locking pin 9 is aligned with the locking hole 10 and the protrusion 1104 is aligned with the protrusion groove 22, it is pushed by the spring 1102 and inserted into the locking hole 10.

[0049] Currently, there are three main types of locking mechanisms for the lever 8 of a ball stop valve: The first method involves locking the valve body 1 directly using a pin that is inserted into it. This method carries the risk that the pin may fall off due to mechanical vibration, causing the locking function to fail. The second method, based on the first method, uses wires and clips to further secure the pin to prevent it from accidentally falling off. However, this method is inconvenient to operate. Tools such as pliers are needed to loosen the wires and clips securing the pin before the pin can be pulled out. Only then can the wrench 8 be used to switch the state of the ball valve. In emergency situations where every second counts, there is a risk of serious accidents and losses due to untimely operation, especially when applied to mining equipment. The third method uses a spring 1102 to keep the pin in the inserted position. When it is necessary to switch the state of the ball valve, the pin can be pulled out after overcoming the resistance of the spring 1102, and then the wrench 8 can be turned. Although it is more convenient to operate than the second method, in high-pressure conditions and when the wrench 8 is difficult to turn, when operating alone, one hand needs to keep the pin pulled out. If the wrench 8 is difficult to turn, it is impossible to operate with both hands, making it even more difficult to turn the wrench 8. Furthermore, even after the wrench 8 is turned, if the pin is released, the pin will rub and scrape against the valve body 1 under the elastic force of the spring 1102 before the wrench 8 continues to turn to the next position. This increases the rotation resistance and reduces the service life of the pin and the valve body 1. In other words, this method still has the problem of inconvenience in operation.

[0050] The retaining component 11 used in this invention allows the protrusion 1104 to be pulled out of the protrusion groove 22 after the locking pin 9 is pulled out of the locking hole 10 by the operating end 1103. Then, rotating the end 1103 will cause the protrusion 1104 to deviate from the protrusion groove 22. Thus, after the end 1103 is released, the protrusion 1104 can cooperate with the spring 1102 to axially lock the locking pin 9 by supporting it on the top of the hollow guide rod 1101. This provides convenience for single-person operation of the ball stop valve, especially under high pressure conditions, and avoids friction and scratching between the locking pin 9 and the valve body 1.

[0051] In addition, by observing the insertion state of the protrusion 1104 into the protrusion groove 22, it is possible to visually determine whether the locking pin 9 is properly inserted into the locking hole 10, and whether the locking pin 9 has been pulled out of the locking hole 10. For example, if the protrusion 1104 cannot be fully inserted into the protrusion groove 22 after the end 1103 is released, it can be determined that the locking pin 9 may be bent or there may be foreign objects in the locking hole 10. When the protrusion 1104 is completely disengaged from the protrusion groove 22, it can be determined that the locking pin 9 has been pulled out.

[0052] The wrench 8 includes a handle 801 and a frustum 802 with a pin hole. The frustum 802 is connected to the valve stem 2. A hollow guide rod 1101 is disposed on the frustum 802. One end of the handle 801 is connected to the frustum 802 and is away from the valve stem 2. The valve housing 101 has an annular plane that is clearance-fitted with the frustum 802. The locking hole 10 is located at the annular plane.

[0053] The clearance fit between the frustum 802 and the annular plane serves two purposes: firstly, it prevents gravel from getting stuck between the frustum 802 and the valve body 1, which could cause the wrench 8 to become stuck; secondly, it effectively protects the locking hole 10 from being blocked by gravel, ensuring that after the ball valve switches states, the locking pin 9 can be smoothly inserted into the corresponding locking hole 10 to lock the wrench 8 and the valve stem 2.

[0054] like Figure 2 As shown, in Embodiment 3 of this application, the frustum 802 has only one handle 801. Figure 1 As shown in Embodiment 4 of this application, at least two handles 801 are arranged in a circumferentially uniform array around the valve stem 2. This is mainly to address the problem that the valve stem 2 is difficult to rotate under high pressure conditions. If two handles 801 are used, it is convenient to rotate the wrench 8 with both hands, and the force on the circumference of the valve stem 2 is uniform, avoiding bending deformation of the valve stem 2 when the wrench 8 is operated with great force on one side.

[0055] The side of the truncated cone 802 is provided with an arc-shaped groove 23. The valve body 1 is provided with a limiting pin 21 that inserts into the arc-shaped groove 23. When the limiting pin 21 moves to the end position at both ends of the arc-shaped groove 23, the locking pin 9 is aligned with the two locking holes 10 respectively. That is, the arc-shaped groove 23 and the limiting pin 21 limit the valve stem 2 to rotate only 90°. On the one hand, this ensures that the valve core is in the correct position when the ball stop valve is in the closed and open states. On the other hand, when one end of the arc-shaped groove 23 abuts against the limiting pin 21, it ensures that the locking pin 9 can be aligned with the corresponding pin hole, which facilitates the locking of the wrench 8.

[0056] The outer contour of the valve body 101 is circular, or at least a regular hexagonal polygon, so that the wall thickness around the fluid passage 4 is uniform or tends to be uniform, which helps to prevent the valve body 1 of the ball gate valve from deforming during processing and manufacturing and under high pressure conditions.

[0057] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A high-pressure ball stop valve that is easy to operate manually, comprising a valve body (1) and a valve stem (2), wherein the valve body (1) is provided with a valve stem hole (3) for the valve stem (2) to be inserted, and one end of the valve stem hole (3) is connected to a fluid passage (4) inside the valve body (1), characterized in that, Also includes: An annular flange (5) is arranged around the side of the valve stem (2) and located inside the valve stem hole (3). The valve body (1) is provided with an annular limiting structure (6) that is directly opposite to the annular flange (5), and the annular flange (5) is located between the annular limiting structure (6) and the fluid channel (4). Rollers (7) roll to connect the annular flange (5) and the annular limiting structure (6), and multiple rollers (7) are arranged around the rotation axis of the valve stem (2); A wrench (8) is connected at one end to the valve stem (2). A locking pin (9) is inserted into the wrench (8) through a pin hole. The valve body (1) is provided with two locking holes (10) corresponding to the closed and open states of the ball stop valve. The locking pin (9) locks the wrench (8) and the valve stem (2) by inserting into the locking holes (10). A retaining component (11) is disposed on the wrench (8) and connected to the locking pin (9), the retaining component (11) being used to retain the locking pin (9) in an inserted state and a pulled-out state relative to the locking hole (10).

2. The high-pressure ball stop valve that is easy to operate manually according to claim 1, characterized in that, The valve stem (2) has an annular limiting groove (12) on its side wall and at the bottom of the annular limiting structure (6) near the fluid channel (4). The groove wall of the limiting groove (12) on the valve stem (2) extends to the top of the annular flange (5). The multiple rollers (7) are restricted in the annular area between the annular flange (5) and the two limiting grooves (12).

3. The high-pressure ball valve for easy manual operation according to claim 1, characterized in that, The roller (7) is spherical.

4. A high-pressure ball stop valve that is easy to operate manually according to claim 1, characterized in that, A sealing groove (13) is provided above / below the roller (7). The sealing groove (13) is located on the side wall of the valve stem (2) / the inner wall of the valve stem hole (3). A first sealing ring (14) is provided in the sealing groove (13).

5. A high-pressure ball valve that is easy to operate manually according to claim 1, characterized in that, The valve stem hole (3) includes a lower channel (301) close to the fluid channel (4) and an upper channel (302) away from the fluid channel (4). The valve body (1) includes a valve shell (101) having a fluid passage (4), a lower passage (301) and a threaded hole (15), and an external threaded cylinder (102) having an upper passage (302). The outer wall of the external threaded cylinder (102) is provided with an external thread that mates with the threaded hole (15). The diameter of the upper channel (302) is smaller than that of the lower channel (301) so that the external threaded cylinder (102) forms the annular limiting structure (6).

6. A high-pressure ball valve that is easy to operate manually according to claim 5, characterized in that, The inner wall of the lower end of the external threaded cylinder (102) is provided with an annular inclined surface (16) extending to the limiting groove (12). A deformation reserve area (17) is formed between the annular inclined surface (16) and the side wall of the valve stem (2), which provides space allowance for the deformation of the external threaded cylinder (102) caused by the extrusion of the roller (7).

7. A high-pressure ball valve that is easy to operate manually according to claim 6, characterized in that, The diameter of the annular inclined plane (16) gradually increases in the direction close to the fluid channel (4).

8. A high-pressure ball valve that is easy to operate manually according to claim 5, characterized in that, The external threaded cylinder (102) is located inside the threaded hole (15), and the upper end of the external threaded cylinder (102) away from the fluid channel (4) is provided with a countersunk hole (18).

9. A high-pressure ball valve that is easy to operate manually according to claim 5, characterized in that, The lower end of the external threaded cylinder (102) of the valve body (1) is in contact with the end wall of the threaded hole (15), and a second sealing ring (19) is provided between the outer wall of the external threaded cylinder (102) and the wall of the threaded hole (15).

10. A high-pressure ball valve that is easy to operate manually according to claim 5, characterized in that, The lower end of the external threaded cylinder (102) has a stepped structure, and the lower end of the stepped structure is a cone with an outer diameter that gradually decreases in the direction close to the fluid channel (4). A sealing cavity (20) for the second sealing ring (19) to be inserted is formed between the lower end of the external threaded cylinder (102) and the wall of the threaded hole (15).

11. A high-pressure ball valve that is easy to operate manually according to claim 5, characterized in that, The retaining assembly (11) includes a hollow guide rod (1101), a spring (1102) and an end (1103). The lower end of the hollow guide rod (1101) is mounted on a wrench (8). The locking pin (9) is inserted into the hollow guide rod (1101) and the pin hole, and can rotate in the pin hole and the hollow guide rod (1101). The locking pin (9) passes through the pin hole and is connected to the end (1103) at one end of the hollow guide rod (1101). The end (1103) connected to the locking pin (9) is provided with a protrusion (1104). The height of the protrusion (1104) is not less than the depth of the locking pin (9) inserted into the locking hole (10). The top of the hollow guide rod (1101) is provided with a protrusion groove (22) for the protrusion (1104) to be inserted. The hollow guide rod (1101) has an annular groove on its inner wall for the spring (1102) to be inserted. A spring seat (1105) is provided in the annular groove, which is sleeved on the locking pin (9) and connected to the spring (1102). After the locking pin (9) is aligned with the locking hole (10) and the protrusion (1104) is aligned with the protrusion groove (22), it is pushed by the spring (1102) and inserted into the locking hole (10).

12. A high-pressure ball valve that is easy to operate manually according to claim 11, characterized in that, The wrench (8) includes a handle (801) and a frustum (802) with a pin hole. The frustum (802) is connected to the valve stem (2). The hollow guide rod (1101) is mounted on the frustum (802). One end of the handle (801) is connected to the frustum (802). The valve housing (101) has an annular plane that is clearance-fitted with the frustum (802). The locking hole (10) is located at the annular plane.

13. A high-pressure ball valve for easy manual operation according to claim 12, characterized in that, At least two of the handles (801) are arranged in a circumferentially uniform array around the valve stem (2).

14. A high-pressure ball valve that is easy to operate manually according to claim 12, characterized in that, The side of the truncated cone (802) is provided with an arc groove (23), and the valve body (1) is provided with a limiting pin (24) that is inserted into the arc groove (23). When the limiting pin (24) moves to the end position at both ends of the arc groove (23), the locking pin (9) is aligned with the two locking holes (10) respectively.

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