Hydraulic pilot controlled two-position four-way water medium reversing ball valve

Abstract

The present application belongs to the technical field of hydraulic reversing valve, disclose a kind of hydraulic pilot control's two-position four-way water medium reversing ball valve, including valve body, first valve assembly, second valve assembly and transmission assembly, wherein: the first valve core on the first valve assembly and the second valve core on the second valve assembly are respectively rotatably arranged in the P port and the T port on the valve body, and they are arranged in central symmetry;Transmission assembly is arranged at the bottom of valve body, and the oil cylinder piston movably arranged on the shell is connected with transmission chain through lever, and the two ends of transmission chain are respectively engaged with the lower end of first valve core and second valve core.This two-position four-way water medium reversing ball valve based on ball valve structure adopts specific hydraulic oil cylinder and chain transmission structure, to realize hydraulic pilot control and water medium isolation controlled, realize zero leakage, avoid the risk of oil leakage into the water of main structure, realize intrinsic safety.

Description

Technical Field

[0001] This invention relates to a hydraulic directional valve, and more particularly to a hydraulically pilot-controlled two-position four-way water medium directional ball valve. Background Technology

[0002] Ball valves are common valves in fluid transport pipelines, offering advantages such as low resistance, good sealing, rapid opening and closing, and high reliability. They are frequently used in fluid transport pipelines in chemical industrial production facilities and other facilities. Ball valves are classified by structure into fixed ball valves, detachable ball valves, three-way ball valves, and four-way ball valves. A four-way ball valve has four channels in its ball, enabling dual-supply switching with a single valve. Each 90° rotation switches the supply mode once, allowing for four-way flow control. Compared to the traditional method requiring 2-4 valves, a single four-way ball valve can replace them, offering advantages such as simple operation, easy cleaning, low cost, and good synchronization.

[0003] However, existing two-position four-way directional valves generally adopt a spool valve structure, and the working medium is generally mineral hydraulic oil. In actual engineering applications, the following problems exist: 1) The spool valve structure adopts a cylindrical pair fit. Since the cylindrical pair has relative movement, a certain clearance must be set, so zero leakage cannot be achieved; 2) When the spool valve structure uses hydraulic oil pilot control of the water medium valve, there is a risk of hydraulic oil leaking into the water medium, which cannot achieve inherent safety. Summary of the Invention

[0004] To address the problems of zero leakage and hydraulic oil leakage into the water medium in existing technologies, this invention proposes a two-position four-way water medium reversing ball valve with hydraulic pilot control that can achieve zero leakage and isolate the hydraulic pilot control from the controlled water medium.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a hydraulically pilot-controlled two-position four-way water medium reversing ball valve, comprising a valve body, a first valve assembly, a second valve assembly, and a transmission assembly, wherein:

[0007] The first valve core on the first valve assembly and the second valve core on the second valve assembly are rotatably disposed in the P port and T port on the valve body, respectively, and the two are arranged in a centrally symmetrical manner.

[0008] The transmission assembly is located at the bottom of the valve body. The cylinder piston, which is movably mounted on the housing, is connected to the transmission chain via a lever. The two ends of the transmission chain are respectively engaged with the lower ends of the first valve core and the second valve core.

[0009] Preferably, the valve body has a first longitudinal cavity, a second longitudinal cavity, a first transverse cavity, and a second transverse cavity arranged in a grid pattern, wherein:

[0010] The first longitudinal cavity is a through hole, and the openings at the front and rear ends are respectively provided with a first valve front reversing end cover and a first valve rear reversing end cover;

[0011] The second longitudinal cavity is a through hole, and the openings at the front and rear ends are respectively provided with a second valve front reversing end cover and a second valve rear reversing end cover.

[0012] One end of the first transverse cavity and the second transverse cavity is an opening that connects to the outside, and a corresponding first sealing plug and a second sealing plug are respectively provided at the opening.

[0013] Preferably, the top of the valve body is provided with a P port, a T port, an A port, and a B port arranged in a cross shape, and the bottom is provided with a first valve actuation hole and a second valve actuation hole, wherein:

[0014] The P port and T port are arranged at left and right intervals, with their lower ends corresponding to the middle of the first longitudinal cavity and the second longitudinal cavity, and their top ends corresponding to the P port flange assembly and T port flange assembly.

[0015] Ports A and B are arranged at an interval, with their lower ends corresponding to the middle of the first and second transverse cavities, and their upper ends corresponding to the flange assemblies of ports A and B; and

[0016] The first valve drive hole and the second valve drive hole are respectively arranged vertically to correspond with the P port and T port at the top, and are used to accommodate the first valve core and the second valve core.

[0017] Preferably, the first valve assembly includes a first valve core, a first pre-valve reversing end cover, a first post-valve reversing end cover, and a first transmission gear, wherein:

[0018] The first valve core is a spherical valve body with openings on the top and side walls. The tube at the top is located inside the P port, and the lower end passes through the first valve transmission hole and is located inside the first cover body.

[0019] The first valve front reversing end cover and the first valve rear reversing end cover are respectively disposed at the front and rear ends of the first longitudinal cavity, and their inner ends are tubular structures with side wall openings, respectively connected to port A or port B.

[0020] The first transmission gear is coaxially mounted on the transmission rod at the lower end of the first valve core and meshes with one end of the transmission chain to drive the first valve core to rotate clockwise or counterclockwise.

[0021] More preferably, the first valve assembly further includes a first sealing ring, a first sliding bearing, a first sealing support ring, and a first balance piston, wherein:

[0022] There are two first sealing rings, which are respectively sealed and connected between the first valve core and the first valve front reversing end cover and the first valve rear reversing end cover;

[0023] The first sliding bearing is movably sleeved on the outer peripheral wall of the top end of the first valve core, and is arranged coaxially with the first valve core and the P port respectively.

[0024] The first sealing support ring is located inside the first valve transmission hole, movably sleeved on the lower middle part of the first valve core, and is coaxially arranged with the first valve transmission hole and the first valve core.

[0025] The first balance piston is located in the first cover at the bottom of the housing, movably sleeved on the lower end of the first valve core, and is arranged coaxially with the first cover and the first valve core.

[0026] Preferably, the second valve assembly includes a second valve core, a second pre-valve reversing end cover, a second post-valve reversing end cover, and a second transmission gear, wherein:

[0027] The second valve core is a spherical valve body with openings on the top and side walls. The tube at the top is located inside the T-port, and the lower end passes downward through the second valve transmission hole and is located inside the second cover body.

[0028] The second valve front reversing end cover and the second valve rear reversing end cover are respectively disposed at the front and rear ends of the second longitudinal cavity, and their inner ends are tubular structures with side wall openings, respectively connected to port A or port B.

[0029] The second transmission gear is coaxially mounted on the transmission rod at the lower end of the second valve core and meshes with the other end of the transmission chain to drive the second valve core to rotate clockwise or counterclockwise.

[0030] More preferably, the second valve assembly further includes a second sealing ring, a second sliding bearing, a second sealing support ring, and a second balance piston, wherein:

[0031] There are two second sealing rings, which are respectively sealed and connected between the second valve core and the second valve front reversing end cover and the second valve rear reversing end cover;

[0032] The second sliding bearing is movably sleeved on the outer peripheral wall of the top end of the second valve core, and is arranged coaxially with the second valve core and the T-port respectively;

[0033] The second sealing support ring is located inside the second valve transmission hole, movably sleeved on the lower middle part of the second valve core, and is coaxially arranged with the second valve transmission hole and the second valve core;

[0034] The second balance piston is located in the second cover at the bottom of the housing, movably sleeved on the lower end of the second valve core, and is coaxially arranged with the second cover and the second valve core.

[0035] Preferably, the first valve core and the second valve core are respectively provided with elongated holes extending downward to the first balance piston and the second balance piston at their axial positions, and the diameters of the first balance piston and the second balance piston are equal to the sealing diameters of the valve cores near the first sliding bearing and the second sliding bearing.

[0036] Preferably, the transmission assembly includes a housing, a hydraulic cylinder piston, a lever, and a transmission chain. The left and right ends of the housing are respectively provided with a first transmission groove, a second transmission groove, an annular chain groove, a hydraulic piston channel, and a lever groove, wherein:

[0037] The first transmission groove and the second transmission groove are located at the left and right ends of the housing, respectively. The bottom is configured as a first cover and a second cover, which are arranged vertically in correspondence with the first valve transmission hole and the second valve transmission hole, respectively.

[0038] The annular chain groove is a circular annular slot, with its two ends connected to the outer edges of the first transmission groove and the second transmission groove, respectively, for accommodating the transmission chain.

[0039] The hydraulic piston channel is located on one side of the annular chain groove, and the cylinder piston, which can move left and right, is sealed inside it.

[0040] The lever groove is located on the bottom plate of the housing, and its front and rear ends are connected to the annular chain groove and the hydraulic piston channel, for accommodating the lever.

[0041] More preferably, the transmission assembly further includes a pilot control oil port flange and an observation window, wherein:

[0042] There are two pilot control port flanges, which are respectively located at the inlet end and the outlet end of the hydraulic piston channel;

[0043] The observation window is made of transparent material, is detachably installed in the lever slot, and its width is greater than the distance the lever can move left and right.

[0044] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0045] The two-position four-way water medium reversing ball valve provided by this invention is based on a ball valve structure and adopts a specific hydraulic cylinder and chain drive structure. The flow medium of the two valve cores is water. The main structure is set in the valve body, and the pilot control parts such as the cylinder piston, lever, and drive chain are set on the lower housing. This achieves isolation between the hydraulic pilot control and the controlled water medium, realizes zero leakage, avoids the risk of oil leakage into the water of the main structure, and thus achieves intrinsic safety. Attached Figure Description

[0046] Figure 1 This is a three-dimensional structural diagram of the two-position four-way water medium reversing ball valve of the present invention. Figure 1 ;

[0047] Figure 2 This is a three-dimensional structural diagram of the two-position four-way water medium reversing ball valve of the present invention. Figure 2 ;

[0048] Figure 3 This is a schematic diagram of the main structure of the two-position four-way water medium reversing ball valve of the present invention;

[0049] Figure 4 for Figure 3 A schematic cross-sectional view of section AA in the two-position four-way water medium reversing ball valve of the present invention;

[0050] Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure of section BB in the two-position four-way water medium reversing ball valve of the present invention;

[0051] Figure 6 for Figure 3 A schematic diagram of the cross-sectional structure of the CC section in the two-position four-way water medium reversing ball valve of the present invention;

[0052] Figure 7 This is a side view of the two-position four-way water medium reversing ball valve of the present invention.

[0053] Figure 8 This is a top view of the two-position four-way water medium reversing ball valve of the present invention.

[0054] Figure 9 for Figure 8 A top view cross-sectional view of the DD structure in the two-position four-way water medium reversing ball valve of the present invention;

[0055] Figure 10 This is an exploded view of the two-position four-way water medium reversing ball valve of the present invention. Figure 1 ;

[0056] Figure 11 This is an exploded view of the two-position four-way water medium reversing ball valve of the present invention. Figure 2 ;

[0057] Figure 12 This is a schematic diagram of the valve body structure in the two-position four-way water medium reversing ball valve of the present invention;

[0058] Figure 13 This is a schematic diagram of the assembly structure of the first valve assembly, the second valve assembly, and the transmission assembly in the two-position four-way water medium reversing ball valve of the present invention. Figure 1 ;

[0059] Figure 14 This is a schematic diagram of the assembly structure of the first valve assembly, the second valve assembly, and the transmission assembly in the two-position four-way water medium reversing ball valve of the present invention. Figure 2 ;

[0060] Figure 15 This is a schematic diagram of the assembly structure of the transmission component in the two-position four-way water medium reversing ball valve of the present invention. Figure 1 ;

[0061] Figure 16 This is a schematic diagram of the assembly structure of the transmission component in the two-position four-way water medium reversing ball valve of the present invention. Figure 2 . Detailed Implementation

[0062] The present invention will now be described in detail and specifically through specific embodiments to enable a better understanding of the invention. However, the following embodiments do not limit the scope of the invention.

[0063] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, a hydraulically pilot-controlled two-position four-way water medium reversing ball valve is provided. This reversing ball valve mainly comprises four parts: a valve body 100, a first valve assembly 200, a second valve assembly 300, and a transmission assembly 400. The first valve assembly 200 and the second valve assembly 300 are respectively installed in the mounting cavity of a square solid, forming a switching valve mechanism. The transmission assembly 400 is installed at the bottom of the valve body 100 and is used to drive and control the rotation of the spherical valve cores on the first valve assembly 200 and the second valve assembly 300 to achieve the purpose of reversing connection.

[0064] Specifically, such as Figure 9 and Figure 10 As shown, a first valve core 210, which is a spherical valve core structure, is provided on the first valve assembly 200. A second valve core 310, which is also a spherical valve core structure, is provided on the second valve assembly 300. The first valve core 210 and the second valve core 310 are rotatably disposed in the P port 105 and T port 106 on the valve body 100, respectively, and are arranged in a centrally symmetrical manner to facilitate linkage via the transmission chain 440.

[0065] To achieve linkage between the first valve core 210 and the second valve core 310, a transmission assembly 400 with a specific structural design is adopted. This transmission assembly 400 is located at the bottom of the valve body 100 and mainly includes a housing 410, a hydraulic cylinder piston 420 movably mounted within the housing 410, and a transmission chain 440. The hydraulic cylinder piston 420 is connected to the transmission chain 440 via a lever 430. Both ends of the transmission chain 440 are respectively engaged with the lower ends of the first valve core 210 and the second valve core 310. The hydraulic cylinder piston 420 is controlled to move left and right using hydraulic pressure, which synchronously drives the transmission chain 440 to rotate via the lever 430, thereby synchronously driving the first valve core 210 and the second valve core 310, which are connected by gears at both ends of the transmission chain 440, to rotate.

[0066] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 10 , Figure 11 and Figure 12 As shown, the valve body 100 is a square solid with multiple mounting cavities. The valve body 100 has a first longitudinal cavity 101, a second longitudinal cavity 102, a first transverse cavity 103, and a second transverse cavity 104 arranged in a grid pattern, which respectively cooperate with the corresponding sealing end cap, sealing plug, and sealing ring.

[0067] The first longitudinal cavity 101 is a through hole that extends from front to back, and a first valve front reversing end cover 220 and a first valve rear reversing end cover 230 are respectively provided at the openings at the front and rear ends. Similarly, the second longitudinal cavity 102 is a through hole that extends from front to back, and a second valve front reversing end cover 320 and a second valve rear reversing end cover 330 are respectively provided at the openings at the front and rear ends.

[0068] The first transverse cavity 103 and the second transverse cavity 104 are arranged laterally at intervals, forming a grid-like cavity that is interconnected with the first longitudinal cavity 101 and the second longitudinal cavity 102 arranged longitudinally at intervals. One end of the first transverse cavity 103 and the second transverse cavity 104 is closed, and the other end is an opening that connects to the outside. The openings are sealed with a first sealing plug 115 and a second sealing plug 116, respectively.

[0069] In some of these embodiments, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the valve body 100 has a cross-shaped arrangement of port P 105, port T 106, port A 107 and port B 108 on its top, and a first valve drive hole 109 and a second valve drive hole 110 on its bottom. Port P 105 and port T 106 are stepped cylindrical holes.

[0070] Specifically, the P port 105 and the T port 106 are arranged at left and right intervals, and their lower ends are connected to the middle of the first longitudinal cavity 101 and the second longitudinal cavity 102, and the P port flange assembly 111 and the T port flange assembly 112 are bolted to their top ends.

[0071] Correspondingly, Port A 107 and Port B 108 are arranged at intervals, located between Ports P 105 and T 106 on the left and right, forming a rhomboid shape. The lower ends of Port A 107 and Port B 108 are connected to the middle of the first transverse cavity 103 and the second transverse cavity 104, and Port A flange assembly 113 and Port B flange assembly 114 are bolted to their respective top ends.

[0072] It should be noted that, for example Figure 1 , Figure 8 , Figure 10 and Figure 11 As shown, in order to ensure that flange assembly 113 (A port), flange assembly 114 (B port), flange assembly 111 (P port), and flange assembly 112 (T port) are stably installed at each opening of the valve body 100, each flange assembly is provided with a fixing screw and a sealing ring to ensure the stability and tightness of the connection between each flange assembly and the corresponding opening.

[0073] Correspondingly, the valve body 100 is provided with corresponding channels and connecting threaded holes, which are respectively connected to the A-port flange assembly 113, B-port flange assembly 114, P-port flange assembly 111, and T-port flange assembly 112, and form a seal with the outside.

[0074] Furthermore, the first valve drive hole 109 and the second valve drive hole 110 are spaced apart on the bottom of the valve body 100, and the first valve drive hole 109 and the second valve drive hole 110 are respectively arranged vertically to correspond to the P port 105 and T port 106 on the top, for accommodating the first valve core 210 and the second valve core 310, and so that the first valve core 210 and the second valve core 310 pass through the first valve drive hole 109 and the second valve drive hole 110 respectively to drive and connect to the transmission assembly 400.

[0075] In some of these embodiments, such as Figure 1 , Figure 5 , Figure 8 , Figure 10 , Figure 11 , Figure 13 , Figure 14 and Figure 15As shown, the first valve assembly 200 mainly includes a first valve core 210, a first valve front reversing end cover 220, a first valve rear reversing end cover 230, and a first transmission gear 270.

[0076] The first valve core 210 is a spherical valve body with openings on the top and side walls, and the side through holes are connected to the middle through holes. The tube at the top of the first valve core 210 is located inside the P port 105, and the lower end passes downward through the first valve transmission hole 109 and is located inside the first cover 415. That is to say, the top opening of the first valve core 210 is connected to the P port 105, and the side wall opening is connected to the hollow tubes of the first valve front reversing end cover 220 and the first valve rear reversing end cover 230.

[0077] The first valve front reversing end cover 220 and the first valve rear reversing end cover 230 are respectively disposed at the front and rear ends of the first longitudinal cavity 101, and their inner ends are tubular structures with side wall openings, respectively connected to port A 107 or port B 108.

[0078] Rotating the first valve core 210 allows its side wall opening to connect to the inner end of the pipe body of the first valve pre-reversing end cover 220, and then to port A 107 through the opening in the side wall of the pipe body. Alternatively, rotating the first valve core 210 180° allows it to connect to the inner end of the pipe body of the first valve post-reversing end cover 230, and then to port B 108 through the opening in the side wall of the pipe body. This changes the connection from port P 105 to port A 107 to port P 105 to port B 108.

[0079] To enable transmission between the first valve core 210 and the transmission chain 440, a first transmission gear 270 is provided at the lower end of the first valve core 210. The first transmission gear 270 is coaxially mounted on the transmission rod at the lower end of the first valve core 210. The first transmission gear 270 is meshed with one end of the transmission chain 440 to drive the first valve core 210 to rotate clockwise or counterclockwise.

[0080] In addition, to achieve sealing and stability of the first valve core 210 installed in the valve body 100, the first valve assembly 200 also includes a first sealing ring 240, a first sliding bearing 250, a first sealing support ring 260, and a first balance piston 280 installed in the first transmission groove 411.

[0081] There are two first sealing rings 240, which are made of polymer. They are installed at the front and rear ends of the first longitudinal cavity 101 respectively, and are respectively sealed between the first valve core 210 and the first valve front reversing end cover 220 and the first valve rear reversing end cover 230. They are used to ensure the sealing between the first valve core 210 and the first valve front reversing end cover 220 and the first valve rear reversing end cover 230 during the rotation process.

[0082] To cooperate with the spherical first valve core 210, the first sealing ring 240 made of polymer material is provided with a spherical surface that mates with the spherical surface of the first valve core 210. Utilizing the elasticity of the polymer sealing ring material, it is assembled with an interference fit along the axial direction and locked by bolts on the first valve front reversing end cap 220 and the first valve rear reversing end cap 230 at both ends, so that the first sealing ring 240 and the spherical surface of the first valve core 210 fit together and seal.

[0083] The first sliding bearing 250 is installed inside the P port 105 and is movably sleeved on the outer peripheral wall of the top end of the first valve core 210. It is coaxially arranged with the first valve core 210 and the P port 105 to ensure the stability of the upper end of the first valve core 210 during rotation.

[0084] The first sealing support ring 260 is installed inside the first valve transmission hole 109, movably sleeved on the lower middle part of the first valve core 210, and is arranged coaxially with the first valve transmission hole 109 and the first valve core 210. It serves to support the first valve core 210 and at the same time ensure the stability and sealing performance of the connection between it and the valve body 100.

[0085] In addition, the first balance piston 280 is located inside the first cover 415 at the bottom of the housing 410, is movably sleeved on the lower end of the first valve core 210, and is arranged coaxially with the first cover 415 and the first valve core 210.

[0086] Through the P-port 105 and the first valve drive hole 109 opened in the valve body 100, a stepped cylindrical hole is formed as a whole, which is used to house the first sliding bearing 250, the first valve core 210, and the first sealing support ring 260. The first sliding bearing 250 and the first sealing support ring 260 are used to constrain the first valve core 210 to rotate on the valve body 100, and at the same time, the sealing rings on the first valve core 210 and the first sealing support ring 260 form a seal at the upper and lower ends of the first valve core 210.

[0087] In some of these embodiments, such as Figure 1 , Figure 5 , Figure 8 , Figure 10 , Figure 11 , Figure 13 , Figure 14 and Figure 15 As shown, the structure of the second valve assembly 300 is the same as that of the first valve assembly 200, and the two are arranged in a centrally symmetrical manner. Similarly, the second valve assembly 300 mainly includes a second valve core 310, a second valve front reversing end cover 320, a second valve rear reversing end cover 330, and a second transmission gear 370.

[0088] The second valve core 310 is a spherical valve body with openings on the top and side walls, and the lateral through holes communicate with the central through hole. The tube at its top is located inside the T-port 106, and the lower end passes downward through the second valve transmission hole 110 and is located inside the second cover 416. That is, the top opening of the second valve core 310 connects to the T-port 106, and the side wall opening connects to the hollow tubes of the second valve front reversing end cover 320 and the second valve rear reversing end cover 330. The second valve front reversing end cover 320 and the second valve rear reversing end cover 330 are respectively located at the front and rear ends of the second longitudinal cavity 102, and their inner ends are tubular structures with side wall openings, communicating with the B-port 108 or the A-port 107 respectively.

[0089] In use, by rotating the second valve core 310, its side wall opening can be connected to the tube body inside the second valve pre-reversing end cover 320, and then connected to port B 108 through the opening in the side wall of the tube body. Alternatively, rotating the second valve core 310 180° will connect it to the tube body inside the second valve post-reversing end cover 330, and then to port A 107 through the opening in the side wall of the tube body. This changes the connection from port P 105 to port B 108 to port P 105 to port A 107.

[0090] To enable transmission between the second valve core 310 and the transmission chain 440, a second transmission gear 370 is provided at the lower end of the second valve core 310. The second transmission gear 370 is coaxially mounted on the transmission rod at the lower end of the second valve core 310. The first transmission gear 270 is meshed with the other end of the transmission chain 440 to drive the second valve core 310 to rotate clockwise or counterclockwise.

[0091] In addition, to achieve sealing and stability of the second valve core 310 installed in the valve body 100, the second valve assembly 300 also includes a second sealing ring 340, a second sliding bearing 350, a second sealing support ring 360, and a second balance piston 380.

[0092] There are two second sealing rings 340, which are respectively installed at the front and rear ends of the second longitudinal cavity 102 and respectively sealed between the second valve core 310 and the second valve front reversing end cover 320 and the second valve rear reversing end cover 330, in order to ensure the sealing between the second valve core 310 and the second valve front reversing end cover 320 and the second valve rear reversing end cover 330 during rotation.

[0093] To cooperate with the spherical second valve core 310, the polymer material second sealing ring 340 is provided with a spherical surface that mates with the spherical surface of the second valve core 310. Utilizing the elasticity of the polymer sealing ring material, it is assembled with an interference fit along the axial direction and locked by bolts on the two ends of the second valve front reversing end cover 320 and the second valve rear reversing end cover 330, so that the second sealing ring 340 and the spherical surface of the second valve core 310 fit together and seal.

[0094] The second sliding bearing 350 is installed inside the T-port 106 and is movably sleeved on the outer peripheral wall of the top end of the second valve core 310. It is coaxially arranged with the second valve core 310 and the T-port 106 to ensure the stability of the upper end of the second valve core 310 during rotation.

[0095] The second sealing support ring 360 is located inside the second valve transmission hole 110, movably sleeved on the lower middle part of the second valve core 310, and is coaxially arranged with the second valve transmission hole 110 and the second valve core 310. It serves to support the second valve core 310 and ensure the stability and sealing performance of the connection between it and the valve body 100.

[0096] In addition, the second balance piston 380 is located inside the second cover 416 at the bottom of the housing 410, is movably sleeved on the lower end of the second valve core 310, and is arranged coaxially with the second cover 416 and the second valve core 310.

[0097] Similar to the limiting rotation and sealing structure of the first valve core 210, a stepped cylindrical hole is formed by the T-port 105 and the second valve transmission hole 110 opened in the valve body 100, which are connected vertically. This hole is used to house the second sliding bearing 350, the second valve core 310, and the second sealing support ring 360. The second sliding bearing 350 and the second sealing support ring 360 are used to constrain the second valve core 310 to rotate on the valve body 100. At the same time, the sealing rings on the second valve core 310 and the second sealing support ring 360 form a seal at both ends of the second valve core 310.

[0098] In some of these embodiments, such as Figure 4 and Figure 9 As shown, considering the presence of pressure at the oil port P or T, to prevent the first valve core 210 and the second valve core 310 from being subjected to pressure along the valve core axial direction, a downwardly extending slender hole is respectively opened at the center of the first valve core 210 and the middle position of the second valve core 310. A first balance piston 280 and a second balance piston 380 are set at the lower end of the first valve core 210 and the second valve core 310 near the chain. The diameter of the first balance piston 280 and the second balance piston 380 is approximately the same as the sealing diameter on the side of the valve core near the first sliding bearing 250 and the second sliding bearing 350. This ensures that the forces acting on the first valve core 210 and the second valve core 310 are equal in magnitude and opposite in direction, with a resultant force of zero in the axial direction.

[0099] During installation, such as Figure 5 and Figure 9As shown, in the initial state, the lateral outlet of the first valve core 210 faces one side, and the P port 105 at its top communicates with the B port 108 through the channel of the first valve pre-reversing end cover 220; in the initial state, the lateral outlet of the second valve core 310 faces the other side, and the T port 106 at its top communicates with the A port 107 through the channel of the second valve post-reversing end cover 330. Using the sprocket mechanism provided on the first valve core 210 and the second valve core 310, the rotation of the two valve cores is linked by the transmission chain 440 to achieve synchronous rotation. When the first valve core 210 rotates 180°, the communication between the P port 105 and the B port 108 changes to communication with the A port 107; the second valve core 310 also rotates 180°, changing the communication between the T port 106 and the A port 107 to communication with the B port 108, thus realizing a two-position four-way switching function.

[0100] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the transmission assembly 400 mainly includes a housing 410, a hydraulic cylinder piston 420, a lever 430, and a transmission chain 440. The housing 410 has a first transmission groove 411, a second transmission groove 412, an annular chain groove 413, a hydraulic piston channel 414, and a lever groove 417 for mounting the lower ends of the first valve core 210 and the second valve core 310, the hydraulic cylinder piston 420, the lever 430, and the transmission chain 440.

[0101] Specifically, in order to realize the transmission connection between the first valve core 210 and the second valve core 310 and the transmission chain 440, the first transmission groove 411 and the second transmission groove 412 are respectively located at the left and right ends of the housing 410 as mounting holes, and the bottom is set as the first cover 415 and the second cover 416, which are respectively arranged vertically to correspond to the first valve transmission hole 109 and the second valve transmission hole 110.

[0102] The first cover 415 and the second cover 416 are integral with the housing 410. The first cover 415 and the second cover 416 have channels and bolt holes, connecting to the valve body 100 to fix the first valve core 210 and the second valve core 310, forming mounting holes for installing the first balance piston 280 and the second balance piston 380. During assembly, the lower ends of the first valve core 210 and the second valve core 310 extend downwards into the first transmission groove 411 and the second transmission groove 412, and are connected by a transmission chain 440.

[0103] A horizontally extending hydraulic piston channel 414 is provided within the housing 410. One end of the hydraulic piston channel 414 is designated as an X-port pilot control port, and the other end as a Y-port pilot control port. Pilot control port flanges 450 are installed at each port. When pressurized oil is input from the X-port pilot control port and returned to the oil tank via the Y-port pilot control port, the cylinder piston 420 moves towards the Y-port side. Conversely, when pressurized oil is input from the Y-port pilot control port and returned to the oil tank via the X-port pilot control port, the cylinder piston 420 moves towards the X-port side.

[0104] To accommodate the transmission chain 440, an annular chain groove 413 is provided inside the housing 410. The annular chain groove 413 is a circular annular slot, and its two ends are connected to the outer edges of the first transmission groove 411 and the second transmission groove 412, respectively, to accommodate the transmission chain 440 without affecting the rotation of the transmission chain 440.

[0105] To enable the installation and driving of the hydraulic cylinder piston 420, a hydraulic piston channel 414 that runs through the left and right sides is provided inside the housing 410. The hydraulic piston channel 414 is located on one side of the annular chain groove 413. The hydraulic cylinder piston 420 can be slidably installed in the hydraulic piston channel 414, and O-rings are fitted at both ends of the hydraulic cylinder piston 420 to ensure the sealing between the piston and the inner wall of the hydraulic piston channel 414 during the left and right sliding process.

[0106] Furthermore, the lever 430 serves as a transmission mechanism connecting the hydraulic cylinder piston 420 and the transmission chain 440, and is mounted on the hydraulic cylinder piston 420. The lever 430 and the hydraulic cylinder piston 420 are fastened together by a slot and screws, so that the movement of the hydraulic cylinder piston 420 is consistent with that of the lever 430, and it can slide left and right with the hydraulic cylinder piston 420.

[0107] Specifically, a slot is provided on the lever 430 to engage the transmission chain 440, ensuring that the movement of the transmission chain 440 is synchronized with that of the lever 430. The movement distance of the lever 430 is no greater than the straight segment of the transmission chain 440. Through calculation and design, the linear displacement distance of the cylinder piston 420 is limited to the range of 180° rotation of the transmission gear. This converts the movement of the cylinder piston 420 into the rotational movement of the valve core. The distance the cylinder piston 420 moves from the X port side to the Y port side is exactly equal to the 180° rotation angle, thereby achieving three-position four-way reversing under hydraulic pilot control.

[0108] To facilitate the installation of the lever 430, a lever groove 417 for accommodating the lever 430 is provided on the bottom plate of the housing 410. The front and rear ends of the lever groove 417 are connected to the annular chain groove 413 and the hydraulic piston channel 414. During the left and right movement of the cylinder piston 420 and the lever 430, the transmission chain 440 is driven to rotate synchronously. Thus, by utilizing the transmission relationship meshing with the lower end of the valve core, the first valve core 210 and the second valve core 310 are driven to actively realize the connection and reversal between port P 105 and port T 106 and port A 107 and port B 108, respectively.

[0109] In some of these embodiments, such as Figure 2 , Figure 3 , Figure 4 , Figure 10 , Figure 11 , Figure 13 , Figure 15 and Figure 16 As shown, the transmission assembly 400 also includes a pilot control port flange 450 and an observation window 460. There are two pilot control port flanges 450, which are respectively located at the inlet and outlet ends of the hydraulic piston channel 414 and are respectively connected to the inlet and outlet of the oil pump through pipelines. They are used to control the left and right movement of the cylinder piston 420 in the hydraulic piston channel 414 by the oil pressure difference between the two ends.

[0110] The observation window 460 is made of a transparent material, such as plexiglass, and is detachably installed within the lever slot 417. Its width is greater than the distance the lever 430 can move left and right. The position of the lever 430 can be clearly seen through the observation window 460, thus clearly indicating the working status of the valve core.

[0111] In addition, lifting rings 117 are provided on the front and rear side walls or the left and right side walls of the valve body 100. The screw at one end of the lifting ring 117 is detachably installed on the valve body 100 by means of threaded connection, which facilitates the transfer of valve components.

[0112] In summary, this hydraulically pilot-controlled two-position four-way water-medium directional ball valve uses water as the flow medium in its first valve assembly 200 and second valve assembly 300. The main structure is located inside the valve body 100, while the pilot control components, such as the cylinder piston 420, lever 430, and transmission chain 440, are located on the lower cover. This achieves natural isolation between the pilot control components and the main body, avoiding the risk of oil leakage into the water of the main structure and ensuring inherent safety.

[0113] The specific embodiments of the present invention have been described in detail above, but they are merely examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A hydraulically pilot-controlled two-position four-way water medium reversing ball valve, characterized in that, It includes a valve body (100), a first valve assembly (200), a second valve assembly (300), and a transmission assembly (400), wherein: The first valve core (210) on the first valve assembly (200) and the second valve core (310) on the second valve assembly (300) are respectively rotatably disposed in the P port (105) and T port (106) on the valve body (100), and the two are arranged in a centrally symmetrical manner. The transmission assembly (400) is located at the bottom of the valve body (100). The cylinder piston (420) movably disposed on its housing (410) is connected to the transmission chain (440) via a lever (430). The two ends of the transmission chain (440) are respectively engaged with the lower ends of the first valve core (210) and the second valve core (310). The valve body (100) has a first longitudinal cavity (101), a second longitudinal cavity (102), a first transverse cavity (103), and a second transverse cavity (104) arranged in a grid pattern, wherein: The first longitudinal cavity (101) is a through hole, and the openings at the front and rear ends are respectively provided with a first valve front reversing end cap (220) and a first valve rear reversing end cap (230). The second longitudinal cavity (102) is a through hole, and the openings at the front and rear ends are respectively provided with a second valve front reversing end cap (320) and a second valve rear reversing end cap (330). One end of the first transverse cavity (103) and the second transverse cavity (104) is an opening that connects to the outside, and a first sealing plug (115) and a second sealing plug (116) are respectively provided at the opening. The valve body (100) has a cross-shaped arrangement of a P port (105), a T port (106), an A port (107), and a B port (108) at its top, and a first valve drive hole (109) and a second valve drive hole (110) at its bottom, wherein: The P port (105) and T port (106) are arranged at left and right intervals, and their lower ends are connected to the middle of the first longitudinal cavity (101) and the second longitudinal cavity (102), and their top ends are respectively provided with P port flange assembly (111) and T port flange assembly (112). The A port (107) and B port (108) are arranged at an interval, with their lower ends corresponding to the middle of the first transverse cavity (103) and the second transverse cavity (104), and their upper ends corresponding to the A port flange assembly (113) and the B port flange assembly (114); and The first valve drive hole (109) and the second valve drive hole (110) are respectively arranged vertically to the P port (105) and T port (106) at the top, and are used to accommodate the first valve core (210) and the second valve core (310).

2. The two-position four-way water medium reversing ball valve according to claim 1, characterized in that, The first valve assembly (200) includes a first valve core (210), a first pre-valve reversing end cover (220), a first post-valve reversing end cover (230), and a first transmission gear (270), wherein: The first valve core (210) is a spherical valve body with openings on the top and side walls. The tube at the top is located inside the P port (105), and the lower end passes through the first valve drive hole (109) and is located inside the first cover (415). The first valve front reversing end cap (220) and the first valve rear reversing end cap (230) are respectively disposed at the front and rear ends of the first longitudinal cavity (101), and their inner ends are tubular structures with side wall openings, respectively connected to the A port (107) or the B port (108). The first transmission gear (270) is coaxially mounted on the transmission rod at the lower end of the first valve core (210) and meshes with one end of the transmission chain (440) to drive the first valve core (210) to rotate clockwise or counterclockwise.

3. The two-position four-way water medium reversing ball valve according to claim 2, characterized in that, The first valve assembly (200) further includes a first sealing ring (240), a first sliding bearing (250), a first sealing support ring (260), and a first balance piston (280), wherein: There are two first sealing rings (240), which are respectively sealed and connected between the first valve core (210) and the first valve front reversing end cover (220) and the first valve rear reversing end cover (230); The first sliding bearing (250) is movably sleeved on the top outer peripheral wall of the first valve core (210), and is coaxially arranged with the first valve core (210) and the P port (105) respectively. The first sealing support ring (260) is located inside the first valve transmission hole (109), is movably sleeved on the lower middle part of the first valve core (210), and is coaxially arranged with the first valve transmission hole (109) and the first valve core (210). The first balance piston (280) is located inside the first cover (415) at the bottom of the housing (410), is movably sleeved on the lower end of the first valve core (210), and is coaxially arranged with the first cover (415) and the first valve core (210).

4. The two-position four-way water medium reversing ball valve according to claim 3, characterized in that, The second valve assembly (300) includes a second valve core (310), a second pre-valve reversing end cover (320), a second post-valve reversing end cover (330), and a second transmission gear (370), wherein: The second valve core (310) is a spherical valve body with openings on the top and side walls. The tube at the top is located inside the T-port (106), and the lower end passes through the second valve drive hole (110) and is located inside the second cover (416). The second valve front reversing end cap (320) and the second valve rear reversing end cap (330) are respectively disposed at the front and rear ends of the second longitudinal cavity (102), and their inner ends are tubular structures with side wall openings, respectively connected to port A (107) or port B (108); The second transmission gear (370) is coaxially mounted on the transmission rod at the lower end of the second valve core (310) and meshes with the other end of the transmission chain (440) to drive the second valve core (310) to rotate clockwise or counterclockwise.

5. The two-position four-way water medium reversing ball valve according to claim 4, characterized in that, The second valve assembly (300) further includes a second sealing ring (340), a second sliding bearing (350), a second sealing support ring (360), and a second balance piston (380), wherein: There are two second sealing rings (340), which are respectively sealed and connected between the second valve core (310) and the second valve front reversing end cover (320) and the second valve rear reversing end cover (330); The second sliding bearing (350) is movably sleeved on the outer peripheral wall of the top end of the second valve core (310), and is coaxially arranged with the second valve core (310) and the T-port (106) respectively; The second sealing support ring (360) is located inside the second valve transmission hole (110), is movably sleeved on the lower middle part of the second valve core (310), and is coaxially arranged with the second valve transmission hole (110) and the second valve core (310); The second balance piston (380) is located inside the second cover (416) at the bottom of the housing (410), is movably sleeved on the lower end of the second valve core (310), and is coaxially arranged with the second cover (416) and the second valve core (310).

6. The two-position four-way water medium reversing ball valve according to claim 5, characterized in that, The first valve core (210) and the second valve core (310) have slender holes extending downward to the first balance piston (280) and the second balance piston (380) respectively at their axial positions, and the diameters of the first balance piston (280) and the second balance piston (380) are equal to the sealing diameter of the valve core on the side close to the first sliding bearing (250) and the second sliding bearing (350).

7. The two-position four-way water medium reversing ball valve according to claim 1, characterized in that, The transmission assembly (400) includes a housing (410), a hydraulic cylinder piston (420), a lever (430), and a transmission chain (440). The housing (410) has a first transmission groove (411), a second transmission groove (412), an annular chain groove (413), a hydraulic piston channel (414), and a lever groove (417), wherein: The first transmission groove (411) and the second transmission groove (412) are located at the left and right ends of the housing (410) respectively, and the bottom is configured as the first cover (415) and the second cover (416), which are respectively arranged vertically in correspondence with the first valve transmission hole (109) and the second valve transmission hole (110). The annular chain groove (413) is a circular annular groove, with its two ends connected to the outer edges of the first transmission groove (411) and the second transmission groove (412) respectively, for accommodating the transmission chain (440). The hydraulic piston channel (414) is located on one side of the annular chain groove (413), and the cylinder piston (420) that can move left and right is sealed inside it. The lever groove (417) is located on the bottom plate of the housing (410), and its front and rear ends are connected to the annular chain groove (413) and the hydraulic piston channel (414) for accommodating the lever (430).

8. The two-position four-way water medium reversing ball valve according to claim 7, characterized in that, The transmission assembly (400) further includes a pilot control port flange (450) and an observation window (460), wherein: There are two pilot control port flanges (450), which are respectively located at the inlet end and the outlet end of the hydraulic piston channel (414); The observation window (460) is made of transparent material, is detachably installed in the lever slot (417), and its width is greater than the distance between the left and right movements of the lever (430).

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