Bidirectional hard sealing floating ball valve

Abstract

A sliding sleeve opening is formed in one side of a valve body, a sliding sleeve piece is slidably connected into the sliding sleeve opening, a valve cavity is formed in the portion, on one side of the sliding sleeve piece, of the valve body, a valve ball is rotatably connected into the valve cavity, a valve rod piece is fixedly connected to the portion, at the upper end of the valve ball, of the outside of the valve body, and the lower end of the valve rod piece penetrates through the valve body and then is connected with the valve ball. A trunnion piece is fixedly connected outside the valve body at the lower end of the valve ball, the upper end of the trunnion piece penetrates through the valve body and then is connected with the valve ball, one end of the valve body is fixedly connected with a left valve pipe fitting through a bolt, the other end of the valve body is fixedly connected with a right valve pipe fitting, sealing devices are arranged in the left valve pipe fitting and the right valve pipe fitting, and the sealing devices are arranged on the two sides of the valve ball respectively. The invention aims to provide a bidirectional hard sealing floating ball valve which is simple and convenient to operate, free of bidirectional leakage and stable in operation through a sliding sleeve opening assembling structure, a bidirectional pressure self-compensation sealing device and an upper and lower dual-support rotating structure.

Description

Technical Field

[0001] The invention relates to the technical field of bidirectional sealing ball valves, in particular to a bidirectional hard-sealed floating ball valve. Background Art

[0002] As a widely used fluid control component, ball valves play a vital role in numerous industries, including petroleum, chemical, electric power, metallurgy, and water conservancy, thanks to their relatively simple structure, rapid opening and closing, and low flow resistance. Their core component is a sphere with a through hole (the valve ball), which controls the flow of fluids through 90-degree rotation. Ball valves are primarily categorized as floating ball or fixed ball, depending on the ball's support method.

[0003] Floating ball valves rely on medium pressure to compress the valve ball against the sealing seat in the closed state to achieve a seal. To meet increasingly demanding operating conditions, especially for harsh media such as high temperature, high pressure, highly corrosive, or toxic and harmful media, higher standards are being set for the sealing performance, reliability, and service life of floating ball valves.

[0004] Traditional floating ball valves often face several key challenges in long-term use:

[0005] 1. Sealing reliability issues: Especially in conditions of bidirectional flow or frequent opening and closing, the sealing surface is easily worn or affected by pressure fluctuations, resulting in reduced sealing performance and the risk of leakage. A single static sealing structure is often unable to cope with complex operating conditions and long-term wear.

[0006] 2. Complexity of assembly and maintenance: The installation and subsequent maintenance and disassembly process of internal core components such as valve balls is sometimes cumbersome and requires specific directions and sequences, which affects assembly efficiency and convenience of use and maintenance.

[0007] 3. Operational stability: The rotational stability of the valve ball during opening and closing, especially under high differential pressure, is crucial to the reliable operation of the valve. Poor support structure design may lead to increased valve operating torque, increased component wear, and even valve ball seizure.

[0008] 4. Double-acting sealing requirements: For bidirectional application scenarios that require reliable sealing when the medium flows in any direction, traditional sealing structures may have limitations in design and performance, and a better structural design is needed to ensure zero leakage in both directions.

[0009] 5. Maintaining long-term sealing performance: Sealing components will naturally wear or deform after long-term use. How to design a sealing structure that can automatically compensate for wear and maintain the initial sealing force is the key to extending the life of the valve.

[0010] In response to the above challenges, the industry has been continuously exploring more optimized floating ball valve structural designs, especially committed to improving bidirectional sealing performance, enhancing operational stability, simplifying assembly processes, and achieving effective automatic compensation for seal wear. Summary of the Invention

[0011] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a bidirectional hard-sealed floating ball valve that is easy to operate, has zero leakage in both directions and runs smoothly through a sliding sleeve assembly structure, a bidirectional pressure self-compensating sealing device and an upper and lower double support rotating structure.

[0012] The cam is secured to the cam face and is designed to engage a plurality of camshafts, each of which is secured to a plurality of camshafts, each of which is secured to a plurality of positions. The cam is secured to a plurality of positions on the cam face and is designed to engage a plurality of positions of the plurality of positions.

[0013] In the above technical solution, the specific structure of the valve stem and the connection structure with the valve body are as follows:

[0014] The valve stem member includes a valve stem seat, a sealing packing, a positioning sleeve, a first compression spring, a first thrust bearing, a valve seat cover, and a valve actuator. The middle portion of the upper end of the valve body is fixedly connected to the valve stem seat, and the upper end of the valve stem seat is fixedly connected to the valve seat cover by bolts. The middle portion of the valve seat cover is provided with an inner groove, and a first sleeve hole is provided on the valve stem seat opposite to the inner groove. The lower end of the first sleeve hole is provided with a rotating shaft hole, and the valve actuator is rotatably connected in the rotating shaft hole. The lower end of the valve actuator passes through the rotating shaft hole and is connected to the valve ball. The sliding sleeve on the valve actuator in the first sleeve hole is connected to a sealing packing, and the sealing packing is arranged in the first sleeve hole. A positioning sleeve is also provided in the first sleeve hole, and the lower end of the positioning sleeve The cam is pressed against the piston rod and the piston rod is pressed against the piston rod, and the piston rod is pressed against the piston rod of the piston rod, and the piston rod is pressed against the piston rod of the piston rod.

[0015] In the above technical solution, the upper end of the valve actuator rod is provided with a first square shaft head after passing through the valve seat cover, the lower end of the valve actuator rod is connected to a slot plate after passing through the rotating shaft hole, the upper end of the valve ball is provided with a slot hole, and the slot plate is plugged into the slot hole.

[0016] In the above technical solution, the specific structure of the trunnion member and the connection structure with the valve body are as follows:

[0017] The ear shaft member includes a fixed shaft, a connecting shaft, a second rotating shaft sleeve, a second square shaft head, a second thrust bearing, and a second compression spring. A second shaft sleeve hole is opened in the middle of the lower end of the valve body, and the upper end of the second shaft sleeve hole is connected with a rotating hole. The rotating hole is connected to the valve cavity. A cover plate groove is opened on the outer wall of the valve body at the lower end of the second shaft sleeve hole. A cover plate is fixedly connected to the cover plate groove by bolts. A rotating hole is opened in the middle of the cover plate. A connecting shaft is rotatably connected in the rotating hole. The upper end of the connecting shaft is fixedly connected to a fixed The second end of the second rotating shaft sleeve is connected to the fixed shaft through the rotating hole, and the lower end of the second rotating shaft sleeve is in contact with the second compression spring, and the lower end of the second compression spring is in contact with the cover plate.

[0018] In the above technical solution, the specific structure of the sliding sleeve is:

[0019] The inner side of the sliding sleeve and the valve cavity form a ball cavity for the valve ball to rotate. The outer side of the sliding sleeve is provided with a mounting groove ring, and a first sealing ring is embedded and installed in the mounting groove ring. The first sealing ring conflicts with the inner wall of the sliding sleeve opening. A plurality of limiting holes are provided on the outer end face of the sliding sleeve. A plurality of limiting pins are fixedly connected to the left valve pipe fitting on one side of the limiting hole. The limiting pins are respectively plugged into the limiting holes. A sealing gasket is provided between the sliding sleeve and the left valve pipe fitting, and the sealing gasket is provided with a through hole corresponding to the limiting hole.

[0020] In the above technical solution, the connection structure of the left valve pipe fitting and the right valve pipe fitting is:

[0021] The left valve pipe fitting and the right valve pipe fitting both include an internal flange, an external flange, and a valve body pipeline. The two ends of the valve body pipeline are respectively fixedly connected to the internal flange or the external flange, and the internal flange is respectively fixedly connected to the two ends of the valve body by bolts.

[0022] In the above technical solution, the specific structure of the sealing device is:

[0023] The sealing device includes a sealing seat, a sealing ring, a pressing sleeve, a pressing sleeve, a pressing spring, and a second sealing ring. Assembly holes are respectively provided in the valve body pipe at one end of the internal flange, and a sealing groove is provided in the valve body pipe at the end of the assembly hole. A sealing ring is sleeved in the sealing groove, and one end of the pressing sleeve is embedded in the sealing groove and is connected to the sealing ring. The other end of the pressing sleeve is fixedly connected to the pressing sleeve, and the pressing sleeve is slidably connected to the assembly hole. The outer periphery of the pressing sleeve is sleeved with a pressing spring, one end of the pressing spring is in contact with the bottom of the assembly hole, and the other end of the pressing spring is in contact with the pressing sleeve. After one end of the sealing seat is inserted into the assembly hole, it is plugged into the pressing sleeve, and a second sealing ring is arranged between the pressing sleeve and the sealing seat.

[0024] In the above technical solution, the sealing seat is further optimized as follows:

[0025] The cam is secured to the cam face of the valve body and is adapted to engage the cam face of the valve body with respect to the cam, and the cam face is secured to the cam face of the valve body with respect to the cam face.

[0026] Beneficial effects of the present invention:

[0027] 1. More reliable sealing, long-term leakage-free: Through the carefully designed sealing device (including the compression spring) and the compression spring structure in the valve stem and trunnion, the sealing surface can be continuously and automatically compressed during the use of the valve. Even if the sealing element has a certain degree of wear due to long-term use, the spring can automatically "fill" the gap, always maintaining close contact between the valve ball and the sealing surface, thereby effectively preventing the medium from leaking from any direction. It is especially reliable under high temperature, high pressure or corrosive media conditions.

[0028] 2. Easier installation and disassembly: The unique sliding sleeve design allows the internal valve ball to be easily placed into the valve cavity at a suitable angle, greatly simplifying the initial assembly of the core component (valve ball). At the same time, the structural design of the fittings at both ends of the valve body (especially the left valve fitting with a stop pin) and the sliding sleeve, as well as the clear step-by-step assembly process of the valve stem and trunnion components, make the assembly, disassembly and subsequent maintenance of the entire valve easier, saving time and reducing operational difficulty.

[0029] 3. More stable and smooth valve opening and closing: The upper end of the valve ball is precisely controlled by the valve stem, while the lower end is stably supported by the trunnion. This design, effectively supported at both ends ("double top and bottom support"), acts like a stable revolving door shaft, greatly improving the stability and concentricity of the valve ball during opening and closing. Even under high pipeline pressure, the valve ball rotates smoothly and steadily, effectively avoiding shaking or sticking, and achieving more uniform operating torque.

[0030] 4. The seal is effective for both forward and reverse flows: The sealing devices of the ball valve are arranged symmetrically on both sides of the valve ball (in both the left and right valve fittings). The internal spring loading mechanism ensures that no matter whether the medium flows from left to right or from right to left (i.e. bidirectional flow), the sealing surface can automatically and tightly fit the valve ball surface under the action of the spring force, providing a consistent high-quality sealing effect, which perfectly meets the needs of application scenarios that require bidirectional isolation of the medium.

[0031] 5. Longer life and lower maintenance costs: The aforementioned multiple sealing designs (such as automatic compensation and multiple sealing rings) and the stable structure of upper and lower double supports work together to effectively reduce abnormal wear of key components (such as sealing rings and valve ball support surfaces). The automatic compensation function of the spring delays the performance degradation caused by seal wear, significantly extending the overall service life of the valve and reducing the maintenance costs associated with frequent component replacement, making long-term use more economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a bottom-up perspective structural diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from a top view;

[0034] Figure 3 This is a schematic diagram of the disassembled internal structure of the left valve pipe fitting of the present invention;

[0035] Figure 4 This is a schematic diagram of the disassembled structure of the valve stem member of the present invention;

[0036] Figure 5 This is a schematic diagram of the disassembled structure of the trunnion member of the present invention;

[0037] Figure 6 This is a schematic diagram of the connection structure of the sealing device of the present invention;

[0038] Figure 7 This is a schematic diagram of the disassembled structure of the sealing device of the present invention;

[0039] Figure 8 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention;

[0040] Figure 9 Schematic diagram of the cross-sectional structure of the sliding sleeve of the present invention;

[0041] Figure 10 It is a schematic diagram of the cross-sectional structure of the sealing seat of the present invention.

[0042] In the figure: 1 valve body, 2 valve ball, 3 left valve fitting, 4 right valve fitting, 6 sets of sliding parts, 7 sliding sleeve opening, 8 valve chamber;

[0043] 11 mounting groove ring, 12 first sealing ring, 13 limiting hole, 14 limiting pin, 15 sealing gasket, 21 internal flange, 22 external flange, 23 valve body pipeline;

[0044] 10 valve stem;

[0045] 101 valve stem seat, 102 sealing packing, 103 positioning sleeve, 104 first compression spring, 105 first thrust bearing, 106 valve seat cover, 107 valve actuator, 108 inner groove, 109 first sleeve hole, 110 rotating shaft hole, 111 compression spring plate, 112 first square shaft head, 113 slot plate, 114 slot hole;

[0046] 20 trunnion pieces;

[0047] 201 fixed shaft, 202 connecting shaft, 203 second rotating shaft sleeve, 204 second square shaft head, 205 second thrust bearing, 206 second compression spring, 207 second shaft sleeve hole, 208 rotating hole, 209 cover plate groove, 210 cover plate, 211 rotating hole, 212 square shaft hole;

[0048] 30 sealing device;

[0049] 301 sealing seat, 302 sealing ring, 303 pressing ring, 304 pressing sleeve, 305 pressing spring, 306 second sealing ring, 307 assembly hole, 308 sealing groove;

[0050] 3010 pressure contact ring, 3011 outer convex ring, 3012 limit groove, 3013 slot ring, 3014 plug-in slot, 3015 floating gap, 3016 activity space. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0052] See also Figure 1-10A bidirectional hard-seal floating ball valve includes a valve body 1, a valve ball 2, a left valve pipe fitting 3, a right valve pipe fitting 4, a sealing device 30, a sleeve sliding member 6, a valve stem member 10, and a trunnion member 20. A sliding sleeve opening 7 is provided on one side of the valve body 1. The sliding sleeve opening 7 is used to facilitate the installation of the valve ball 2 into the valve body 1. A sliding sleeve is slidably connected in the sliding sleeve opening 7. A valve cavity 8 is provided in the valve body 1 on one side of the sliding sleeve. The inner side of the sliding sleeve and the valve cavity 8 form a ball cavity for the rotation of the valve ball 2. The material flow of the ball valve is controlled by the rotation of the valve ball 2. Closed, the outer side of the sliding sleeve is provided with a mounting groove ring 11, and the mounting groove ring 11 is fitted with a first sealing ring 12. The first sealing ring 12 conflicts with the inner wall of the sliding sleeve opening 7 to prevent the liquid in the material from leaking out. The outer end face of the sliding sleeve is provided with a plurality of limiting holes 13, and a plurality of limiting pins 14 are fixedly connected to the left valve pipe 3 on one side of the limiting hole 13. The limiting pins 14 are respectively plugged into the limiting holes 13 to limit and fix the sliding sleeve installed in the valve body 1 to avoid the ball valve from sliding during use. When shaking occurs in the valve body 1, a sealing gasket ring 15 is provided between the sliding sleeve and the left valve pipe fitting 3 to further prevent liquid from leaking out. A through hole corresponding to the limit hole 13 is opened on the sealing gasket ring 15 to facilitate the installation and fixation of the sealing gasket ring 15. The valve body 1 at the upper end of the valve ball 2 is fixedly connected to the valve stem 10. The lower end of the valve stem 10 passes through the valve body 1 and is connected to the valve ball 2. When in use, the valve stem 10 is used to control the rotation of the valve ball 2. The valve body 1 at the lower end of the valve ball 2 is fixedly connected to the trunnion member 20. The trunnion member 2 0 The upper end passes through the valve body 1 and is also connected to the valve ball 2. The trunnion member 20 can improve the rotational stability of the valve ball 2 in the valve body 1. One end of the valve body 1 is fixedly connected to the left valve pipe fitting 3 by bolts, and the other end of the valve body 1 is fixedly connected to the right valve pipe fitting 4. The left valve pipe fitting 3 and the right valve pipe fitting 4 are used to facilitate the installation and connection of the ball valve to the material pipe. The left valve pipe fitting 3 and the right valve pipe fitting 4 are both provided with sealing devices 30. The sealing devices 30 are respectively arranged on both sides of the valve ball 2 to improve the sealing performance after the ball valve is closed.

[0053] See also Figure 4The valve stem member 10 includes a valve stem seat 101, a sealing packing 102, a positioning sleeve 103, a first compression spring 104, a first thrust bearing 105, a valve seat cover 106, and a valve actuator 107. The valve stem seat 101 is fixedly connected to the middle part of the upper end of the valve body 1. The valve stem seat 101 is the main installation structure of the valve stem member 10. The upper end of the valve stem seat 101 is fixedly connected to the valve seat cover 106 by bolts. An inner groove 108 is provided in the middle part of the valve seat cover 106. A first shaft sleeve hole 109 is provided on the valve stem seat 101 opposite to the inner groove 108. A rotating shaft hole 110 is provided at the lower end of the first shaft sleeve hole 109. The valve actuator 107 is rotatably connected in the rotating shaft hole 110, and the lower end of the valve actuator 107 passes through the rotating shaft hole After 110, it is connected to the valve ball 2, and the valve ball 2 is directly controlled to rotate by the valve actuator 107. The sliding sleeve on the valve actuator 107 in the first sleeve hole 109 is connected with a sealing packing 102, and the sealing packing 102 is arranged in the first sleeve hole 109. The sealing packing 102 is used to enhance the sealing performance in the first sleeve hole 109 to prevent liquid from leaking outward along the valve actuator 107. A positioning sleeve 103 is also provided in the first sleeve hole 109. The lower end of the positioning sleeve 103 conflicts with the sealing packing 102. When in use, the relative fixation of the sealing packing 102 can be achieved by the positioning sleeve 103, thereby enhancing the sealing performance of the sealing packing 102. The upper end of the positioning sleeve 103 passes through the first sleeve hole 109. The shaft sleeve hole 109 conflicts with the first compression spring 104, the upper end of the first compression spring 104 conflicts with the compression spring plate 111, the upper end of the compression spring plate 111 conflicts with the first thrust bearing 105, the first thrust bearing 105 conflicts with the bottom surface of the inner groove 108, the first thrust bearing 105 is connected to the valve actuator 107, and the upper end of the valve actuator 107 passes through the middle of the valve seat cover 106. When in use, the valve seat cover 106 is installed and fixed to compress the internal first compression spring 104. The elastic force of the first compression spring 104 acts on the upper end of the positioning sleeve 103, so that the lower end of the positioning sleeve 103 is pressed tightly against the sealing packing 102, thereby increasing the sealing packing 102 through external force. 2. The other end of the first compression spring 104 applies pressure to the compression spring plate 111, and the compression spring plate 111 applies force to the bottom of the first thrust bearing 105. The first thrust bearing 105 includes two thrust washers and a group of rolling elements. The rolling elements are rollingly connected between the two groups of thrust washers. An annular groove is provided on the valve actuator 107. The two groups of thrust washers are slidably connected in the annular groove. One group of thrust washers contacts the compression spring plate 111, and the other group of thrust washers contacts the bottom surface of the inner groove 108. Thus, the position of the valve actuator 107 is relatively fixed through the first thrust bearing 105 (that is, the axial displacement of the valve actuator 107 is limited, but the circumferential rotation of the valve actuator 107 is not affected);The upper end of the valve actuator 107 passes through the valve seat cover 106 and is provided with a first square shaft head 112. This first square shaft head 112 is used to mount the valve handle, facilitating operation and control of the valve actuator 107. The lower end of the valve actuator 107 passes through the rotating shaft hole 110 and is connected to a slot plate 113. The upper end of the valve ball 2 has a slot hole 114, and the slot plate 113 is plugged into the slot hole 114. When the valve actuator 107 rotates, the valve actuator 107 drives the valve ball 2 to rotate through the slot plate 113 and the slot hole 114.

[0054] See also Figure 5 The ear shaft member 20 includes a fixed shaft 201, a connecting shaft 202, a second rotating shaft sleeve 203, a second square shaft head 204, a second thrust bearing 205, and a second compression spring 206. A second shaft sleeve hole 207 is opened in the middle of the lower end of the valve body 1. The upper end of the second shaft sleeve hole 207 is connected with a rotating hole 208. The rotating hole 208 is connected to the valve chamber 8. A cover plate groove 209 is opened on the outer wall of the valve body 1 at the lower end of the second shaft sleeve hole 207. A cover plate 210 is fixedly connected to the cover plate groove 209 by bolts. A rotating hole 211 is opened in the middle of the cover plate 210. The connecting shaft 202 is rotatably connected in the rotating hole 211. The upper end of the connecting shaft 202 is fixedly connected to the fixed shaft 201, and the other end of the fixed shaft 201 passes through the rotating hole 20 8 is connected to the second square shaft head 204, and a square shaft hole 212 is opened at the lower end of the valve ball 2. The second square shaft head 204 is plugged into the square shaft hole 212, and the sliding sleeve in the second shaft sleeve hole 207 is connected to the second rotating shaft sleeve 203. The fixed shaft 201 is rotatably connected in the second rotating shaft sleeve 203, and the lower end of the second rotating shaft sleeve 203 is in contact with the second thrust bearing 205. The second thrust bearing 205 is connected to the fixed shaft 201, and the lower end of the second thrust bearing 205 is in contact with the second compression spring 206. The lower end of the second compression spring 206 is in contact with the cover plate 210. In the present invention, the fixed shaft 201 and the axis of the valve actuator 107 are located on the same straight line, which can ensure the stability of the valve ball 2 rotating along the axis.

[0055] See also Figure 6 The left valve pipe fitting 3 and the right valve pipe fitting 4 both include an internal flange 21, an external flange 22, and a valve body pipe 23. The two ends of the valve body pipe 23 are fixedly connected to the internal flange 21 or the external flange 22 respectively. The internal flange 21 is fixedly connected to the two ends of the valve body 1 by bolts, and the external flange 22 can be installed and fixed with the external pipe by bolts.

[0056] See also Figure 6-10, the sealing device 30 includes a sealing seat 301, a sealing ring 302, a pressing ring 303, a pressing sleeve 304, a pressing spring 305, and a second sealing ring 306. The valve body pipe 23 at one end of the internal flange 21 is respectively provided with an assembly hole 307, and the valve body pipe 23 at the end of the assembly hole 307 is provided with a sealing groove 308. The sealing groove 308 is sleeved with a sealing ring 302. One end of the pressing sleeve 304 is fitted into the sealing groove 308 and is in contact with the sealing ring 302. The other end of the pressing sleeve 304 is fixedly connected to the pressing ring 303. The pressing ring 303 is slidably connected to the assembly hole 307. The pressing sleeve 304 The outer periphery of the is connected with a pressure piece spring 305, one end of the pressure piece spring 305 is in conflict with the bottom of the assembly hole 307, and the other end of the pressure piece spring 305 is in conflict with the pressure sleeve 303. After one end of the sealing seat 301 is inserted into the assembly hole 307, it is plugged into the pressure sleeve 303, and a second sealing ring 306 is provided between the pressure sleeve 303 and the sealing seat 301; a pressure contact ring 3010 that closely fits the surface of the valve ball 2 is provided at the port at one end of the sealing seat 301, and an outer convex ring 3011 is provided on the outer periphery of the sealing seat 301 at one end of the pressure contact ring 3010, and a limiting groove 301 is provided in the port of the sliding sleeve and the port at the other end of the valve body 1. 12, the outer convex ring 3011 is respectively slidably connected in the limiting groove 3012, and a slot ring 3013 is fixedly connected to the sealing seat 301 on one side of the pressing ring 303, and a plug-in groove 3014 is provided on the opposite side of the pressing ring 303. The slot ring 3013 is plugged into the plug-in groove 3014, and the outer peripheral sleeve of the slot ring 3013 is connected to the second sealing ring 306, and the two ends of the second sealing ring 306 are respectively in conflict with the sealing seat 301 and the pressing ring 303; a floating gap 3015 is reserved in the limiting groove 3012 for the axial movement of the outer convex ring 3011, and a movable gap is left between one end of the slot ring 3013 and the bottom surface of the plug-in groove 3014 The spacing of the movable space 3016 is the same as the spacing of the floating gap 3015; the elastic force of the pressure spring 305 acts on one end of the pressure ring 303, and the pressure ring 303 applies the force to one side of the second sealing ring 306, so that the second sealing ring 306 is tightly pressed between the pressure ring 303 and the sealing seat 301, and at the same time, under the elastic force of the compression spring, the pressure contact ring 3010 at one end of the sealing seat 301 is in close contact with the valve ball 2, ensuring the sealing of the connection between the sealing seat 301 and the valve ball 2, and through the provision of the floating gap 3015 and the movable space 3016, the sealing device 30 is allowed to have a certain error during the production process.

[0057] See also Figure 1-10 , the installation steps of the ball valve provided by the present invention are:

[0058] Step 1: Install the valve ball 2: Install the valve ball 2 into the valve body 1. During the installation process, the valve ball 2 tilts into the valve cavity 8, and then the valve ball 2 is adjusted so that the two ends of the valve ball 2 correspond to the valve stem 10 or the trunnion 20 respectively.

[0059] Step 2: Install the valve stem 10: Insert the sealing packing 102 into the first sleeve hole 109, then plug the positioning sleeve 103 into the first sleeve hole 109, and make the bottom of the positioning sleeve 103 contact the sealing packing 102, then place the first compression spring 104 on the positioning sleeve 103, and place the compression spring plate 111 on the upper end of the first compression spring 104. Then, insert the valve stem 107 through the compression spring plate 111, the positioning sleeve 103, and the middle of the sealing packing 102 in sequence. The first thrust bearing 105 on the valve actuator 107 contacts the top of the compression spring plate 111. Then, the valve seat cover 106 is installed. During the installation process, as the bolts are tightened, the valve seat cover 106 gradually approaches the valve stem seat 101. During this process, the first square shaft head 112 is continuously rotated to observe whether the valve ball 2 rotates with it. Ensure that the slot plate 113 can be plugged into the slot hole 114 during this process. After confirming that the valve ball 2 rotates with it, tighten all bolts one by one.

[0060] Step 3: Install the ear shaft 20: Turn over the valve body 1 so that the second shaft sleeve hole 207 faces upward, then insert the fixed shaft 201 into the rotating hole 208, and make the second square shaft head 204 plug and connect to the square shaft hole 212 at the bottom of the valve ball 2. After that, plug and connect the second rotating shaft sleeve 203 into the second shaft sleeve hole 207, and insert the fixed shaft 201 into the middle of the second rotating shaft sleeve 203. Finally, put the second thrust bearing 205 and the second compression spring 206 into the second shaft sleeve hole 207 in sequence. Finally, close the cover plate 210 and connect it to the cover plate groove 209 and fix it with bolts. During this process, the connecting shaft 202 at one end of the fixed shaft 201 is plugged and connected to the rotating hole 211.

[0061] Step 4: Install the sliding sleeve. Insert the sliding sleeve directly into one end of the valve body 1 along the sliding sleeve opening 7, and ensure that the two notches of the sliding sleeve connection section correspond to the installation positions of the trunnion member 20 and the valve stem member 10 respectively.

[0062] Step 5, install the left valve fitting 3 or the right valve fitting 4 (generally install the sliding sleeve side first, that is, the left valve fitting 3 in the present invention): first put the sealing ring 302 into the sealing groove 308 in the valve body pipe 23, then sleeve the pressure piece spring 305 on the pressure sleeve 304, and then insert the pressure sleeve 304 and the pressure ring 303 together into the assembly hole 307 (the pressure sleeve 304 and the pressure ring 303 are designed as an integrated whole) until one end of the pressure sleeve 304 is in contact with the sealing groove 308. The sealing ring 302 inside is in contact with each other, and then the second sealing ring 306 is sleeved and connected to the slot ring 3013, and then inserted into the assembly hole 307 together with the sealing seat 301, so that the slot ring 3013 is docked with the plug-in groove 3014 on one side of the pressing ring 303, and finally the valve body 1 and the internal flange 21 on one side of the valve body pipe 23 are installed and fixed by bolts (when installing the left valve fitting 3, the limit pin 14 and the limit hole 13 need to be plugged and connected to each other).

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0064] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A bidirectional hard-sealed floating ball valve, comprising a valve body (1), a valve ball (2), a left valve pipe fitting (3), a right valve pipe fitting (4), a sealing device (30), a sleeve sliding member (6), a valve stem member (10), and a trunnion member (20), characterized in that: A sliding sleeve opening (7) is provided on one side of the valve body (1), a sliding sleeve is slidably connected in the sliding sleeve opening (7), a valve cavity (8) is provided in the valve body (1) on one side of the sliding sleeve, a valve ball (2) is rotatably connected in the valve cavity (8), a valve stem (10) is fixedly connected to the outside of the valve body (1) at the upper end of the valve ball (2), the lower end of the valve stem (10) passes through the valve body (1) and is connected to the valve ball (2), the valve body ( 1) is fixedly connected to an ear shaft member (20) on the outside, and the upper end of the ear shaft member (20) is also connected to the valve ball (2) after passing through the valve body (1). One end of the valve body (1) is fixedly connected to a left valve pipe member (3) by bolts, and the other end of the valve body (1) is fixedly connected to a right valve pipe member (4). A sealing device (30) is provided in each of the left valve pipe member (3) and the right valve pipe member (4), and the sealing device (30) is respectively arranged on both sides of the valve ball (2).

2. A bidirectional hard-sealed floating ball valve according to claim 1, characterized in that: The valve stem member (10) comprises a valve stem seat (101), a sealing packing (102), a positioning sleeve (103), a first compression spring (104), a first thrust bearing (105), a valve seat cover (106), and a valve actuator (107). The valve stem seat (101) is fixedly connected to the middle portion of the upper end of the valve body (1). The upper end of the valve stem seat (101) is fixedly connected to the valve seat cover (106) by bolts. The valve seat cover (107) is fixedly connected to the valve stem seat (101). 06) is provided with an inner groove (108) in the middle, and a first shaft sleeve hole (109) is provided on the valve stem seat (101) opposite to the inner groove (108), and a rotating shaft hole (110) is provided at the lower end of the first shaft sleeve hole (109), and a valve actuator (107) is rotatably connected in the rotating shaft hole (110), and the lower end of the valve actuator (107) passes through the rotating shaft hole (110) and is connected to the valve ball (2), and the first shaft sleeve hole ( The upper sleeve of the valve actuator (107) in the valve actuator (109) is connected with a sealing packing (102), and the sealing packing (102) is arranged in the first sleeve hole (109). A positioning sleeve (103) is also arranged in the first sleeve hole (109). The lower end of the positioning sleeve (103) is in conflict with the sealing packing (102), and the upper end of the positioning sleeve (103) passes through the first sleeve hole (109) and is in contact with the first compression spring. (104), the upper end of the first compression spring (104) conflicts with the compression spring plate (111), the upper end of the compression spring plate (111) conflicts with the first thrust bearing (105), the first thrust bearing (105) conflicts with the bottom surface of the inner groove (108), the first thrust bearing (105) is connected to the valve actuator (107), and the upper end of the valve actuator (107) passes through the middle of the valve seat cover (106).

3. A bidirectional hard-sealed floating ball valve according to claim 2, characterized in that: The upper end of the valve actuator rod (107) passes through the valve seat cover (106) and is provided with a first square shaft head (112); the lower end of the valve actuator rod (107) passes through the rotating shaft hole (110) and is connected to a slot plate (113); the upper end of the valve ball (2) is provided with a slot hole (114), and the slot plate (113) is plugged into the slot hole (114).

4. A bidirectional hard-sealed floating ball valve according to claim 1, characterized in that: The ear shaft member (20) comprises a fixed shaft (201), a connecting shaft (202), a second rotating shaft sleeve (203), a second square shaft head (204), a second thrust bearing (205), and a second pressing spring (206). A second shaft sleeve hole (207) is provided in the middle of the lower end of the valve body (1). The upper end of the second shaft sleeve hole (207) is connected with a rotating hole (208). The rotating hole (208) is communicated with the valve cavity (8). A cover plate groove (209) is provided on the outer wall of the valve body (1) at the lower end of the second shaft sleeve hole (207). A cover plate (210) is fixedly connected to the cover plate groove (209) by bolts. A rotating hole (211) is provided in the middle of the cover plate (210). The connecting shaft (202) is rotatably connected to the rotating hole (211). The upper end of the connecting shaft (202) is fixed. A fixed shaft (201) is connected, and the other end of the fixed shaft (201) is connected to a second square shaft head (204) after passing through a rotating hole (208). A square shaft hole (212) is provided at the lower end of the valve ball (2), and the second square shaft head (204) is plugged into the square shaft hole (212). The second shaft sleeve hole (207) is connected to a second rotating shaft sleeve (203) through a sliding sleeve. The fixed shaft (201) is rotatably connected in the second rotating shaft sleeve (203), and the lower end of the second rotating shaft sleeve (203) is abutted against and connected to a second thrust bearing (205). The second thrust bearing (205) is connected to the fixed shaft (201), and the lower end of the second thrust bearing (205) is abutted against and connected to a second compression spring (206). The lower end of the second compression spring (206) is abutted against and connected to the cover plate (210).

5. The bidirectional hard-seal floating ball valve according to claim 1, characterized in that: The inner side of the sliding sleeve and the valve cavity (8) form a ball cavity for the valve ball (2) to rotate. The outer side of the sliding sleeve is provided with a mounting groove ring (11). A first sealing ring (12) is embedded in the mounting groove ring (11). The first sealing ring (12) contacts the inner wall of the sliding sleeve opening (7). The outer end face of the sliding sleeve is provided with a plurality of limiting holes (13). A plurality of limiting pins (14) are fixedly connected to the left valve pipe (3) on one side of the limiting hole (13). The limiting pins (14) are respectively plugged into the limiting holes (13).

6. A bidirectional hard-seal floating ball valve according to claim 1, characterized in that: The left valve pipe fitting (3) and the right valve pipe fitting (4) both include an internal flange (21), an external flange (22), and a valve body pipe (23). The two ends of the valve body pipe (23) are respectively fixedly connected to the internal flange (21) or the external flange (22). The internal flange (21) is respectively fixedly connected to the two ends of the valve body (1) by bolts.

7. The bidirectional hard-seal floating ball valve according to claim 1, characterized in that: The sealing device (30) comprises a sealing seat (301), a sealing ring (302), a pressing sleeve (303), a pressing sleeve (304), a pressing piece spring (305), and a second sealing ring (306). An assembly hole (307) is respectively provided in the valve body pipe (23) at one end of the internal flange (21). A sealing groove (308) is provided in the valve body pipe (23) at the end of the assembly hole (307). The sealing ring (302) is sleeved and connected in the sealing groove (308). One end of the pressing sleeve (304) is engaged and connected in the sealing groove (308) and is in contact with the sealing ring (302). The other end of the pressing sleeve (304) is fixedly connected to the pressing ring (303), and the pressing ring (303) is slidably connected in the assembly hole (307). The outer periphery of the pressing sleeve (304) is sleeve-connected with a pressing spring (305), one end of the pressing spring (305) is in contact with the bottom of the assembly hole (307), and the other end of the pressing spring (305) is in contact with the pressing ring (303). One end of the sealing seat (301) is inserted into the assembly hole (307) and then plugged into the pressing ring (303). A second sealing ring (306) is provided between the pressing ring (303) and the sealing seat (301).

8. A bidirectional hard-seal floating ball valve according to claim 7, characterized in that: A pressure contact ring (3010) that closely matches the surface of the valve ball (2) is provided at the port at one end of the sealing seat (301), and an outer convex ring (3011) is provided on the outer periphery of the sealing seat (301) at one end of the pressure contact ring (3010). A limiting groove (3012) is provided in the port of the sliding sleeve and the port at the other end of the valve body (1). The outer convex ring (3011) is respectively slidably connected in the limiting groove (3012) and is located at the pressure sleeve ( A slot ring (3013) is fixedly connected to the sealing seat (301) on one side of the pressure ring (303), and a plug-in groove (3014) is provided on the opposite side of the pressure ring (303). The slot ring (3013) is plugged into the plug-in groove (3014), and the outer peripheral sliding sleeve of the slot ring (3013) is connected to the second sealing ring (306), and the two ends of the second sealing ring (306) are respectively in conflict with the sealing seat (301) and the pressure ring (303).

9. A bidirectional hard-sealed floating ball valve according to claim 8, characterized in that: A floating gap (3015) is reserved in the limiting groove (3012) for axial movement of the outer convex ring (3011), and an active space (3016) is reserved between one end of the slot ring (3013) and the bottom surface of the plug-in groove (3014), and the spacing of the active space (3016) is the same as the spacing of the floating gap (3015).

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