Hydraulic knife gate valve for tank car

Abstract

The hydraulic knife gate valve comprises a connecting pipe, the outer side of the connecting pipe is fixedly connected with a knife gate valve body, the top of the knife gate valve body is fixedly connected with a fixing frame, the interior of the fixing frame is fixedly connected with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with a gate plate, and the gate plate is in sliding connection with the knife gate valve body. The outer side of the knife gate valve body is fixedly connected with a fixing frame. According to the hydraulic knife gate valve for the tank car, the worm, the worm gear, the rotating shaft, the gear, the rack, the connecting rod, the connecting block, the connecting frame and the limiting plate are arranged, so that the function of positioning a connecting pipe and a pipeline of equipment is achieved, the hydraulic knife gate valve can be conveniently installed through bolts subsequently, and manual supporting is not needed; and a bidirectional screw rod, a limiting rod, an adjusting rod, a locking block and a locking groove are arranged, so that the function of quickly disassembling and assembling the filter disc is realized, the filter disc is convenient to disassemble, clean and replace, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of knife gate valves, in particular to a liquid-driven knife gate valve for tank trucks. Background Technique

[0002] The liquid-driven knife gate valve controls the opening and closing of the valve by the reciprocating push of a hydraulic linkage device. If equipped with a sensor or digital display device, it can perform centralized or program control in remote and high-altitude dangerous areas. It is a new type of valve product with strong applicability in the market and is used in the process of using tank trucks.

[0003] In the Chinese utility model patent application number: CN201320061309.2, a liquid-driven knife gate valve for tank trucks is disclosed, which includes a hydraulic cylinder, a bracket and a knife gate valve, and the hydraulic cylinder and the knife gate valve are connected by the bracket; the knife gate valve includes a valve body, a valve plate and a gate plate, the valve plate is arranged at one end of the valve body, and the gate plate is arranged at the other end of the valve body. It has a simple structure, is convenient for maintenance and has good sealing performance.

[0004] Although the above patent realizes the function of assisting the use of the knife gate valve, however, the above patent has the following disadvantages in use: when the above liquid-driven knife gate valve for tank trucks is connected to the pipeline on the equipment, it is necessary to manually hold the valve body and align the position of the knife gate valve with the threaded holes on the flange. During the holding process, it is easy to shake and cause the misalignment of the hole positions, which in turn affects the installation effect and is not convenient for use. Therefore, we propose a liquid-driven knife gate valve for tank trucks. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a liquid-driven knife gate valve for tank trucks, which solves the problem that when the above liquid-driven knife gate valve for tank trucks is connected to the pipeline on the equipment, it is necessary to manually hold the valve body and align the position of the knife gate valve with the threaded holes on the flange. During the holding process, it is easy to shake and cause the misalignment of the hole positions, which in turn affects the installation effect.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0007] A hydraulic knife gate valve for a tank truck, comprising a connecting pipe, a knife gate valve body is fixedly connected to the outside of the connecting pipe, a fixing frame is fixedly connected to the top of the knife gate valve body, a hydraulic cylinder is fixedly connected to the inside of the fixing frame, an output end of the hydraulic cylinder is fixedly connected to a gate plate, the gate plate is slidably connected to the knife gate valve body, a fixing frame is fixedly connected to the outside of the knife gate valve body, connecting blocks are symmetrically and slidably connected to the inside of the fixing frame, a connecting frame is fixedly connected to one side of the connecting block, a limiting plate is fixedly connected to the bottom of the connecting frame, an anti-slip pad is arranged on the outside of the limiting plate, and a filter disc is arranged inside the connecting pipe; when in use, the hydraulic cylinder drives the gate plate to move, facilitating the adjustment of the opening and closing degree of the gate plate, the movement of the connecting block drives the connecting frame to move, and the connecting frame drives the limiting plate to move, so as to tightly fix the flange between the connecting pipe and the external equipment pipeline, which can play a positioning effect, facilitating subsequent installation with bolts without the need for support, and the filter disc can play a filtering effect.

[0008] Preferably, a rotating shaft is rotatably connected to the inside of the fixing frame, a gear is fixedly connected to the outside of the rotating shaft, a connecting rod is fixedly connected to one side of the connecting block, and a rack meshing with the gear is fixedly connected to one end of the connecting rod. The rotating shaft drives the gear to rotate, the rotation of the gear drives the rack to move, and the rack drives the connecting block to move through the connecting rod, thereby assisting in tightly fixing the flange between the connecting pipe and the external equipment pipeline.

[0009] Preferably, a worm is rotatably connected to the inside of the fixing frame, a worm gear meshing with the worm is fixedly connected to the outside of the rotating shaft, and a knob is fixedly connected to one end of the worm. The worm drives the worm gear to rotate, thereby driving the rotating shaft to rotate, facilitating the driving of the gear to rotate.

[0010] Preferably, a connecting seat is fixedly connected to the outside of the connecting pipe, locking blocks are symmetrically and slidably connected to the inside of the connecting seat, and locking grooves cooperating with the locking blocks are symmetrically formed on the outside of the filter disc. The position of the filter disc can be limited and fixed by the locking blocks moving into the locking grooves, facilitating its installation.

[0011] Preferably, sliding grooves are symmetrically formed in the inside of the connecting seat, limiting rods are fixedly connected to the inside of the sliding grooves, adjusting rods are slidably connected to the outside of the limiting rods, and the locking blocks are fixedly connected to the adjusting rods. The movement of the locking blocks can be limited by the limiting rods and the adjusting rods to prevent deviation.

[0012] Preferably, a bidirectional lead screw is rotatably connected to the inside of the connecting seat, the adjusting rod is threadedly connected to the bidirectional lead screw, and a handle is fixedly connected to one end of the bidirectional lead screw. The rotation of the bidirectional lead screw drives the adjusting rod to move, facilitating the quick disassembly and assembly of the filter disc.

[0013] Preferably, positioning blocks are symmetrically and fixedly connected to the outer side of the filter disc. The positioning blocks can play a positioning role during the installation of the filter disc, making the operation convenient.

[0014] The utility model provides a liquid-driven knife gate valve for a tank truck. Compared with the prior art, the following beneficial effects are achieved:

[0015] 1. For the liquid-driven knife gate valve for the tank truck, by setting a worm, a worm gear, a rotating shaft, a gear, a rack, a connecting rod, a connecting block, a connecting frame and a limiting plate, the function of positioning between the connecting pipe and the pipeline of the equipment is realized, which is convenient for subsequent installation by bolts without manual support.

[0016] 2. For the liquid-driven knife gate valve for the tank truck, by setting a bidirectional lead screw, a limiting rod, an adjusting rod, a locking block and a locking groove, the function of quickly disassembling and assembling the filter disc is realized, which is convenient for disassembly, cleaning and replacement, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the utility model;

[0018] Figure 2 is a schematic structural diagram of the knife gate valve body of the utility model;

[0019] Figure 3 is a schematic internal structure diagram of the fixed frame of the utility model;

[0020] Figure 4 is a schematic structural diagram of the connecting rod of the utility model;

[0021] Figure 5 is a schematic internal structure diagram of the connecting seat of the utility model;

[0022] Figure 6 is a schematic structural diagram of the filter disc of the utility model.

[0023] In the figure: 1. Connecting pipe; 2. Limiting plate; 3. Connecting frame; 4. Knife gate valve body; 5. Hydraulic cylinder; 6. Fixed frame; 7. Fixed frame; 8. Filter disc; 9. Gate plate; 10. Connecting block; 11. Worm; 12. Connecting rod; 13. Rotating shaft; 14. Worm gear; 15. Rack; 16. Gear; 17. Limiting rod; 18. Locking block; 19. Adjusting rod; 20. Bidirectional lead screw; 21. Connecting seat; 22. Chute; 23. Positioning block; 24. Locking groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 6 , the present utility model provides a technical solution:

[0026] A liquid-driven knife gate valve for a tank truck, comprising a connecting pipe 1, a knife gate valve body 4 fixedly connected to the outer side of the connecting pipe 1, a fixing frame 6 fixedly connected to the top of the knife gate valve body 4, a hydraulic cylinder 5 fixedly connected to the inside of the fixing frame 6, a gate plate 9 fixedly connected to the output end of the hydraulic cylinder 5, the gate plate 9 being slidably connected to the knife gate valve body 4, a fixing frame 7 fixedly connected to the outer side of the knife gate valve body 4, connecting blocks 10 symmetrically slidably connected to the inside of the fixing frame 7, a connecting frame 3 fixedly connected to one side of the connecting block 10, a limiting plate 2 fixedly connected to the bottom of the connecting frame 3, an anti-slip pad being provided on the outer side of the limiting plate 2, and a filter disc 8 being provided inside the connecting pipe 1; during use, the hydraulic cylinder 5 drives the gate plate 9 to move, facilitating the adjustment of the opening and closing degree of the gate plate 9. The movement of the connecting block 10 drives the connecting frame 3 to move, and the connecting frame 3 drives the limiting plate 2 to move, thereby tightly fixing the flange between the connecting pipe 1 and the pipeline of the external device, which can achieve a positioning effect, facilitating subsequent installation with bolts without the need for support. The filter disc 8 can achieve a filtering effect.

[0027] Further, a rotating shaft 13 is rotatably connected to the inside of the fixing frame 7, a gear 16 is fixedly connected to the outer side of the rotating shaft 13, a connecting rod 12 is fixedly connected to one side of the connecting block 10, and a rack 15 cooperating with the gear 16 is fixedly connected to one end of the connecting rod 12. The rotating shaft 13 drives the gear 16 to rotate, the rotation of the gear 16 drives the rack 15 to move, and the rack 15 drives the connecting block 10 to move through the connecting rod 12, thereby assisting in tightly fixing the flange between the connecting pipe 1 and the pipeline of the external device.

[0028] Further, a worm 11 is rotatably connected to the inside of the fixing frame 7, a worm gear 14 cooperating with the worm 11 is fixedly connected to the outer side of the rotating shaft 13, and a knob is fixedly connected to one end of the worm 11. The worm 11 drives the worm gear 14 to rotate, thereby driving the rotating shaft 13 to rotate, facilitating the driving of the gear 16 to rotate.

[0029] Furthermore, a connection seat 21 is fixedly connected to the outer side of the connecting pipe 1. Locking blocks 18 are symmetrically and slidably connected inside the connection seat 21. Locking grooves 24 that cooperate with the locking blocks 18 are symmetrically formed on the outer side of the filter disc 8. By moving the locking blocks 18 into the inside of the locking grooves 24, the position of the filter disc 8 can be limited and fixed, facilitating its installation.

[0030] Furthermore, sliding grooves 22 are symmetrically formed inside the connection seat 21. A limiting rod 17 is fixedly connected inside the sliding grooves 22. An adjusting rod 19 is slidably connected to the outer side of the limiting rod 17. The locking block 18 is fixedly connected to the adjusting rod 19. Through the arrangement of the limiting rod 17 and the adjusting rod 19, the movement of the locking block 18 can be limited to prevent deviation.

[0031] Furthermore, a bidirectional lead screw 20 is rotatably connected inside the connection seat 21. The adjusting rod 19 is threadedly connected to the bidirectional lead screw 20. One end of the bidirectional lead screw 20 is fixedly connected with a handle. By rotating the bidirectional lead screw 20, the adjusting rod 19 is driven to move, facilitating the quick disassembly and assembly of the filter disc 8.

[0032] Furthermore, positioning blocks 23 are symmetrically and fixedly connected to the outer side of the filter disc 8. Through the arrangement of the positioning blocks 23, a positioning effect can be achieved during the installation of the filter disc 8, and the operation is convenient.

[0033] During use, when the connecting pipe 1 needs to be installed on the pipeline of the tank car, the connecting pipe 1 is placed between the pipelines, and the bolt holes on the outer side of the connecting pipe 1 are aligned with the hole positions on the outer side of the flange of the equipment pipeline. The worm 11 is rotated. The worm 11 drives the rotating shaft 13 to rotate through the worm gear 14. The rotating shaft 13 drives the gear 16 to rotate. By the rotation of the gear 16, the rack 15 is driven to move. The rack 15 drives the limiting plate 2 to move through the connecting rod 12, the connecting block 10 and the connecting frame 3, so that the limiting plate 2 moves to press against the flange of the external pipeline, achieving a positioning effect, facilitating the subsequent installation of the connecting pipe 1 with bolts, and eliminating the need for manual support. Through the arrangement of the filter disc 8, a filtering effect can be achieved during the use of the device. When the filter disc 8 needs to be disassembled, cleaned or replaced, the bidirectional lead screw 20 is rotated. By the rotation of the bidirectional lead screw 20, the adjusting rod 19 is driven to move. Through the arrangement of the limiting rod 17, the movement of the adjusting rod 19 can be limited. The adjusting rod 19 drives the locking block 18 to move out of the locking groove 24, and then the filter disc 8 can be removed, facilitating replacement.

[0034] Meanwhile, the content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art.

[0035] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0036] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid-operated knife gate valve for a tank truck, comprising a connecting pipe (1), characterized in that: A knife gate valve body (4) is fixedly connected to the outer side of the connecting pipe (1). A fixing frame (6) is fixedly connected to the top of the knife gate valve body (4). A hydraulic cylinder (5) is fixedly connected to the inside of the fixing frame (6). An output end of the hydraulic cylinder (5) is fixedly connected to a gate plate (9). The gate plate (9) is slidably connected to the knife gate valve body (4). A fixing frame (7) is fixedly connected to the outer side of the knife gate valve body (4). Connecting blocks (10) are symmetrically and slidably connected to the inside of the fixing frame (7). A connecting frame (3) is fixedly connected to one side of the connecting block (10). A limiting plate (2) is fixedly connected to the bottom of the connecting frame (3). An anti-slip pad is arranged on the outer side of the limiting plate (2). A filter disc (8) is arranged inside the connecting pipe (1).

2. The hydraulic knife gate valve for a tank truck according to claim 1, wherein: A rotating shaft (13) is rotatably connected to the inside of the fixing frame (7). A gear (16) is fixedly connected to the outer side of the rotating shaft (13). A connecting rod (12) is fixedly connected to one side of the connecting block (10). A rack (15) which is matched with the gear (16) is fixedly connected to one end of the connecting rod (12).

3. The liquid-operated knife gate valve for a tank truck according to claim 2, characterized in that: A worm (11) is rotatably connected to the inside of the fixing frame (7). A worm gear (14) which is matched with the worm (11) is fixedly connected to the outer side of the rotating shaft (13). A knob is fixedly connected to one end of the worm (11).

4. A liquid-operated knife gate valve for a tank truck according to claim 1, characterized in that: A connecting seat (21) is fixedly connected to the outer side of the connecting pipe (1). Locking blocks (18) are symmetrically and slidably connected to the inside of the connecting seat (21). Locking grooves (24) which are matched with the locking blocks (18) are symmetrically formed in the outer side of the filter disc (8).

5. The liquid-operated knife gate valve for a tank truck according to claim 4, characterized in that: Chute grooves (22) are symmetrically formed in the inside of the connecting seat (21). A limiting rod (17) is fixedly connected to the inside of the chute groove (22). An adjusting rod (19) is slidably connected to the outer side of the limiting rod (17). The locking block (18) is fixedly connected to the adjusting rod (19).

6. The liquid-operated knife gate valve for a tank truck according to claim 5, wherein: A bidirectional lead screw (20) is rotatably connected to the inside of the connecting seat (21). The adjusting rod (19) is in threaded connection with the bidirectional lead screw (20). A handle is fixedly connected to one end of the bidirectional lead screw (20).

7. The hydraulic knife gate valve for a tank truck according to claim 1, wherein: Positioning blocks (23) are symmetrically fixedly connected to the outer side of the filter disc (8).

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