Bidirectional flow cut-off valve

Abstract

The utility model discloses a two-way flow cut-off valve which comprises a valve sleeve and a valve element, connecting assemblies are installed on the two sides of the valve sleeve, each connecting assembly comprises a first connector and a second connector, movable assemblies are installed on the two sides of the valve element, each movable assembly comprises a first piston and a second piston, and a sealing assembly is installed on the inner side of the valve sleeve. The sealing assembly comprises an annular cavity and a sealing ring, a communicating assembly is installed on the inner side of the valve element, the communicating assembly comprises an inner opening and a through opening, the two-way flow stop valve can automatically conduct circulation and cut-off operation according to the difference of oil pressure in the first connector and the second connector, electric control operation is not needed, the installation and operation complexity is reduced, and the operation efficiency is improved. The valve is more convenient to use, prevents the valve element from moving too fast, reduces impact between the first piston and the first connector and between the second piston and the second connector, reduces abrasion between the valve element and the valve sleeve, guarantees working safety of equipment, prolongs the service life of the equipment, and is suitable for fluid communication and differential pressure cut-off operation.

Description

Technical Field

[0001] The utility model relates to the technical field of flow cut-off valve equipment, in particular to a bidirectional flow cut-off valve. Background Art

[0002] When a dual-pump dual-motor crawler harvester is traveling in a straight line, the speeds of the left and right crawlers are inconsistent due to differences in the volumetric efficiency of the left and right pumps and the left and right motors, resulting in a slight difference in the walking speeds of the left and right crawlers and making it impossible to travel in a straight line. Therefore, a flow cut-off valve device is required to control the connectivity during straight-line travel and to perform the cut-off operation during turning. The utility model patent application number CN202020390065.2 discloses a cut-off valve, in which the valve body and the rear end face of the valve seat respectively adopt discontinuous labyrinth grooves, which are staggered to form a labyrinth-like sealing channel, which not only reduces the medium pressure on the back end face of the valve seat but also increases the length of the sealing channel, completely preventing coal powder, dust and other scaling media from invading the spring cavity. The first annular groove and the second annular groove The first seal prevents the medium from entering the spring cavity, avoiding the situation that the tail of the valve seat of the existing cut-off valve only plays a guiding role and lacks sealing performance, allowing some scaling-prone media to invade the valve seat spring cavity, causing the spring elastic force to decrease or even fail in the long term, and ultimately causing the valve preload force to decrease and cause internal leakage. According to the technical solution disclosed therein, when the existing flow cut-off valve equipment is in use, on the one hand, it is often necessary to operate and control it when the dual-pump and dual-motor crawler harvester is moving in a straight line and turning, thereby increasing the circuit control equipment and increasing the complexity of operation. On the other hand, when the flow cut-off valve is hydraulically controlled for connection and disconnection operations, it is easy for the valve core to be subjected to greater impact due to vibration or excessive pressure, which is not conducive to ensuring the working safety and service life of the equipment.

[0003] Therefore, how to design a two-way flow cut-off valve has become our current problem to be solved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a two-way flow cut-off valve to solve the problems raised in the above background technology. The utility model has a reasonable design and is relatively convenient to use. It is suitable for fluid communication and pressure difference cutting operations.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a two-way flow cut-off valve, comprising a valve sleeve and a valve core, connecting components are installed on both sides of the valve sleeve, the connecting component includes interface 1 and interface 2, movable components are installed on both sides of the valve core, the movable component includes piston 1 and piston 2, a closing component is installed on the inner side of the valve sleeve, the closing component includes an annular cavity and a sealing ring, a connecting component is installed on the inner side of the valve core, the connecting component includes an inner port and a through port, a buffer component is installed on the inner sides of piston 1 and piston 2, and the buffer component includes a guide cavity and a guide rod.

[0006] Furthermore, the first interface is installed on the inner side of one end of the valve sleeve through a thread, the second interface is installed on the inner side of the other end of the valve sleeve through a thread, and the outer side of the valve core is clamped on the inner wall of the valve sleeve.

[0007] Furthermore, the piston 1 is installed on one end of the valve core through bolts, and the piston 2 is installed on the other end of the valve core through bolts. The piston 1 is connected to the interface 1 through a spring, and the piston 2 is connected to the interface 2 through a spring.

[0008] Furthermore, the annular cavity is opened on the inner side of the valve sleeve, and the sealing ring is integrally formed on the outer side of the center of the valve core. The inner diameter of the annular cavity is larger than the outer diameter of the sealing ring, and the outer diameter of the sealing ring is equal to the inner diameter of the valve sleeve.

[0009] Furthermore, the inner port is opened at the center of both ends of the valve core, the through port is opened on the inner side of the valve core, and the inner port and the through port are both located on both sides of the sealing ring.

[0010] Furthermore, the interface 1 is connected to the annular cavity through the inner opening and the through opening, and the annular cavity is connected to the interface 2 through the through opening and the inner opening.

[0011] Furthermore, the guide cavity is respectively opened on the inner side of piston one and piston two, one end of the guide rod is respectively welded to interface one and interface two, the other end of the guide rod extends to the inner side of the guide cavity, the diameter of the guide rod is equal to the inner diameter of the guide cavity, and the guide cavity is connected to the inner port through a fine hole.

[0012] Furthermore, a sealing ring is provided on the outer side of the valve core, the outer side of the sealing ring is clamped on the inner wall of the valve sleeve, and the sealing rings are evenly distributed on the valve core.

[0013] Beneficial effects: 1. When the two-way flow cut-off valve is in use, interface one and interface two are connected to the left and right pumps of the dual-pump dual-motor crawler harvester. When the dual-pump dual-motor crawler harvester is traveling in a straight line, the difference in oil pressure on both sides is small, so that the hydraulic oil can be interconnected through interface one, the inner port, the through port, the annular cavity and interface two. When the dual-pump dual-motor crawler harvester is turning, the pressure difference between interface one and interface two is large, so that when the hydraulic oil flows, it will drive the valve core to move, and then the valve core drives piston one and piston two to move and the sealing ring moves from the inside of the annular cavity to the inner wall of the valve sleeve, so that the inner ports on both sides of the valve core are sealed and blocked by the sealing ring, thereby achieving the purpose of cutting off. It can automatically perform circulation and cutting operations according to the difference in oil pressure in interface one and interface two, without the need for electronic control operation, saving installation and operation complexity, and being more convenient to use.

[0014] 2. When the two-way flow cut-off valve is in use, the valve core moves left and right, which drives the guide chamber to move on the outer side of the guide rod, so that the guide rod pushes the oil in the guide chamber to the inner side of the inner port through the fine hole, or sucks the oil into the inner side of the guide chamber through the fine hole, so that the flow of oil through the fine hole limits the left and right movement of the valve core, preventing the valve core from moving too fast when it is shaken or moved left and right by the oil pressure difference, which can effectively reduce the impact between piston 1 and piston 2 and interface 1 and interface 2, and reduce the wear of the valve core and valve sleeve, thereby ensuring the working safety of the equipment and extending the service life of the equipment.

[0015] 3. The two-way flow cut-off valve has a reasonable design and is efficient and convenient to use. It is suitable for fluid connection and pressure differential cut-off operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the bidirectional flow cut-off valve of the utility model;

[0017] Figure 2 This is a cross-sectional view of the bidirectional flow cut-off valve of the utility model;

[0018] Figure 3 This is a structural diagram of the valve core of the bidirectional flow cut-off valve of the utility model;

[0019] In the figure: 1. Valve sleeve; 2. Valve core; 3. Interface 1; 4. Interface 2; 5. Piston 1; 6. Piston 2; 7. Spring; 8. Ring cavity; 9. Sealing ring; 10. Inner port; 11. Through port; 12. Guide cavity; 13. Fine hole; 14. Guide rod; 15. Sealing ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3 The utility model provides a technical solution: a two-way flow cut-off valve, including a valve sleeve 1 and a valve core 2, connecting components are installed on both sides of the valve sleeve 1, the connecting component includes an interface 1 3 and an interface 2 4, movable components are installed on both sides of the valve core 2, the movable components include piston 1 5 and piston 2 6, a closing component is installed on the inner side of the valve sleeve 1, the closing component includes an annular cavity 8 and a sealing ring 9, a connecting component is installed on the inner side of the valve core 2, the connecting component includes an inner port 10 and a through port 11, a buffer component is installed on the inner side of the piston 1 5 and the piston 2 6, the buffer component includes a guide cavity 12 and a guide rod 14, the guide cavity 12 is respectively opened on the inner side of the piston 1 5 and the piston 2 6, one end of the guide rod 14 is respectively welded on the interface 1 3 and the interface 2 4, the other end of the guide rod 14 extends to the inner side of the guide cavity 12, and the diameter of the guide rod 14 is equal to that of the guide cavity 1 2, the guide cavity 12 is connected to the inner port 10 through the fine hole 13, and the outer side of the valve core 2 is provided with a sealing ring 15. The outer side of the sealing ring 15 is stuck on the inner wall of the valve sleeve 1, and the sealing ring 15 is evenly distributed on the valve core 2. When the valve core 2 moves left and right, it will drive the guide cavity 12 to move on the outer side of the guide rod 14, so that the guide rod 14 pushes the oil in the guide cavity 12 to the inner side of the inner port 10 through the fine hole 13, or sucks the oil into the inner side of the guide cavity 12 through the fine hole 13, so that the flow of oil through the fine hole 13 limits the left and right movement of the valve core 2, preventing the valve core 2 from moving left and right too fast when it is shaken or moved left and right by the oil pressure difference, which can effectively reduce the collision between the piston 1 5 and the piston 2 6 and the interface 1 3 and the interface 2 4, and reduce the wear of the valve core 2 and the valve sleeve 1, thereby ensuring the working safety of the equipment and extending the service life of the equipment.

[0022] In this embodiment, the interface 1 3 is installed on the inner side of one end of the valve sleeve 1 through a thread, the interface 2 4 is installed on the inner side of the other end of the valve sleeve 1 through a thread, the outer side of the valve core 2 is clamped on the inner wall of the valve sleeve 1, the piston 1 5 is installed on one end of the valve core 2 through a bolt, the piston 2 6 is installed on the other end of the valve core 2 through a bolt, the piston 1 5 is connected to the interface 1 3 through a spring 7, the piston 2 6 is connected to the interface 2 4 through a spring 7, the annular cavity 8 is opened on the inner side of the valve sleeve 1, the sealing ring 9 is integrally formed on the outer side of the center of the valve core 2, the inner diameter of the annular cavity 8 is larger than the outer diameter of the sealing ring 9, and the outer diameter of the sealing ring 9 is equal to the inner diameter of the valve sleeve 1, the inner port 10 is opened at the center of both ends of the valve core 2, the through port 11 is opened on the inner side of the valve core 2, the inner port 10 and the through port 11 are both located on both sides of the sealing ring 9, the interface 1 3 is connected to the annular cavity 8 through the inner port 10 and the through port 11, the annular cavity 8 is opened. The through port 11 and the inner port 10 are connected to the interface 2 4. When in use, the interface 1 3 and the interface 2 4 are connected to the left and right pumps of the crawler harvester with dual pumps and dual motors. When the crawler harvester with dual pumps and dual motors is traveling in a straight line, the difference in oil pressure on both sides is small, so that the hydraulic oil can be connected to each other through the interface 1 3, the inner port 10, the through port 11, the annular cavity 8 and the interface 2 4. When the crawler harvester with dual pumps and dual motors is turning, the pressure difference between the interface 1 3 and the interface 2 4 is large, so that when the hydraulic oil flows, it will drive the valve core 2 to move, and then the valve core 2 drives the piston 1 5 and the piston 2 6 to move and the sealing ring 9 to move from the inside of the annular cavity 8 to the inner wall of the valve sleeve 1, so that the inner ports 10 on both sides of the valve core 2 are sealed and blocked by the sealing ring 9, thereby achieving the purpose of cutting off. It can automatically perform circulation and cutting operations according to the difference in oil pressure in the interface 1 3 and the interface 2 4, without the need for electronic control operation, saving installation and operation complexity, and making it more convenient to use.

[0023] When the two-way flow cut-off valve is in use, the interface 1 3 and the interface 2 4 are connected to the left and right pumps of the crawler harvester with dual pumps and dual motors. When the crawler harvester with dual pumps and dual motors travels in a straight line, the difference in oil pressure on both sides is small, so that the hydraulic oil can be interconnected through the interface 1 3, the inner port 10, the through port 11, the annular cavity 8 and the interface 2 4. When the crawler harvester with dual pumps and dual motors turns, the pressure difference between the interface 1 3 and the interface 2 4 is large, so that when the hydraulic oil flows, it will drive the valve core 2 to move, and then the valve core 2 drives the piston 1 5 and the piston 2 6 to move and the sealing ring 9 to move from the inside of the annular cavity 8 to the inner wall of the valve sleeve 1, so that the inner ports 10 on both sides of the valve core 2 are sealed and blocked by the sealing ring 9, thereby achieving the purpose of cutting off, and can automatically adjust the pressure according to the interface 1 3 and the interface 2 4. The oil pressure difference inside the valve core 2 is used to circulate and cut off the valve core 2, without the need for electronic control operation, saving installation and operation complexity, and making it more convenient to use. When the valve core 2 moves left and right, it will drive the guide chamber 12 to move on the outer side of the guide rod 14, and then the guide rod 14 pushes the oil in the guide chamber 12 to the inner side of the inner port 10 through the fine hole 13, or sucks the oil into the inner side of the guide chamber 12 through the fine hole 13, and then the flow of oil through the fine hole 13 limits the left and right movement of the valve core 2, preventing the valve core 2 from moving too fast when it is shaken or moved left and right by the oil pressure difference, which can effectively reduce the collision between the piston 1 5 and the piston 2 6 and the interface 1 3 and the interface 2 4, and reduce the wear of the valve core 2 and the valve sleeve 1, thereby ensuring the working safety of the equipment and extending the service life of the equipment.

[0024] 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 two-way flow cut-off valve, comprising a valve sleeve (1) and a valve core (2), wherein connecting assemblies are installed on both sides of the valve sleeve (1), and the connecting assemblies include a first interface (3) and a second interface (4), and are characterized in that: Movable components are installed on both sides of the valve core (2), and the movable components include piston one (5) and piston two (6). A closing component is installed on the inner side of the valve sleeve (1), and the closing component includes an annular cavity (8) and a sealing ring (9). A connecting component is installed on the inner side of the valve core (2), and the connecting component includes an inner port (10) and a through port (11). A buffer component is installed on the inner sides of piston one (5) and piston two (6), and the buffer component includes a guide cavity (12) and a guide rod (14).

2. The two-way flow cut-off valve according to claim 1, characterized in that: The first interface (3) is installed on the inner side of one end of the valve sleeve (1) through a thread, the second interface (4) is installed on the inner side of the other end of the valve sleeve (1) through a thread, and the outer side of the valve core (2) is clamped on the inner wall of the valve sleeve (1).

3. The two-way flow cut-off valve according to claim 2, characterized in that: The piston 1 (5) is mounted on one end of the valve core (2) by means of bolts, and the piston 2 (6) is mounted on the other end of the valve core (2) by means of bolts. The piston 1 (5) is connected to the interface 1 (3) by means of a spring (7), and the piston 2 (6) is connected to the interface 2 (4) by means of a spring (7).

4. The two-way flow cut-off valve according to claim 3, characterized in that: The annular cavity (8) is opened on the inner side of the valve sleeve (1), and the sealing ring (9) is integrally formed on the outer side of the center of the valve core (2). The inner diameter of the annular cavity (8) is larger than the outer diameter of the sealing ring (9), and the outer diameter of the sealing ring (9) is equal to the inner diameter of the valve sleeve (1).

5. The two-way flow cut-off valve according to claim 1, characterized in that: The inner port (10) is opened at the center of both ends of the valve core (2), and the through port (11) is opened on the inner side of the valve core (2). Both the inner port (10) and the through port (11) are located on both sides of the sealing ring (9).

6. The two-way flow cut-off valve according to claim 5, characterized in that: The interface 1 (3) is connected to the annular cavity (8) through the inner opening (10) and the through opening (11), and the annular cavity (8) is connected to the interface 2 (4) through the through opening (11) and the inner opening (10).

7. The two-way flow cut-off valve according to claim 6, characterized in that: The guide cavity (12) is respectively opened on the inner side of piston one (5) and piston two (6), one end of the guide rod (14) is respectively welded to interface one (3) and interface two (4), the other end of the guide rod (14) extends to the inner side of the guide cavity (12), the diameter of the guide rod (14) is equal to the inner diameter of the guide cavity (12), and the guide cavity (12) is connected to the inner port (10) through the fine hole (13).

8. The two-way flow cut-off valve according to claim 7, characterized in that: The outer side of the valve core (2) is provided with a sealing ring (15), the outer side of the sealing ring (15) is clamped on the inner wall of the valve sleeve (1), and the sealing ring (15) is evenly distributed on the valve core (2).

Images