Bidirectional reversible backstop

Abstract

The utility model relates to a bidirectional reversible backstop which comprises a retainer arranged on a fixed support and a backstop mechanism arranged in the retainer. The non-return mechanism comprises a non-return disc, a guide rod, a forward pawl and a reverse pawl; the non-return disc is fixedly sleeved on the transmission shaft, and the transmission shaft is in running fit with the retainer through a bearing; a forward ratchet wheel and a reverse ratchet wheel are arranged on the non-return disc side by side in the axial direction, a guide hole is formed in the retainer, and the guide rod is arranged in the guide hole in a sliding mode and is parallel to the transmission shaft. The forward pawls and the reverse pawls are arranged on the guide rod at intervals and are in one-to-one correspondence with the forward ratchet wheels and the reverse ratchet wheels respectively; during forward non-return, the guide rod is driven to slide in the axial direction, so that the forward pawl is meshed with the forward ratchet wheel, and the reverse pawl is separated from the reverse ratchet wheel; and during reverse non-return, the guide rod is driven to slide in the axial direction, so that the reverse pawl is meshed with the reverse ratchet wheel, and the forward pawl is separated from the forward ratchet wheel. Through the cooperation of the ratchet wheel and the pawl which can be switched, bidirectional transportation can be achieved, meanwhile, the non-return phenomenon in the starting and stopping process of equipment can be prevented, and safe operation of the equipment is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of backstops and relates to a bidirectional reversible backstop. Background Art

[0002] At present, for unidirectional conveying equipment, in order to ensure the safety and reliability of equipment operation, brakes are usually installed between couplings or check valves are installed at the extended end of the low-speed shaft to protect the equipment and prevent the check valves from appearing during the start and stop of the equipment, causing casualties or equipment damage. Brakes are mainly divided into mechanical brakes, electrical brakes, electromagnetic brakes, hydraulic brakes, etc., and their braking principles are usually achieved through friction, torque offset, kinetic energy conversion, etc. Check valves mainly include belt check valves, roller check valves, special-shaped block check valves, etc. Most check valves have relatively simple structures and can rotate unidirectionally with the direction of the conveying equipment. When the belt conveyor runs in the opposite direction, the check valves can prevent reverse movement.

[0003] As for the inclined reversible conveying equipment, the brake can have a braking effect but does not have an anti-reverse function. If it is given an anti-reverse function, it has disadvantages such as small stopping torque, large space occupation and high cost. As for the above-mentioned check valve, it has a one-way anti-reverse function, but it cannot have an anti-reverse effect and still meet the two-way operation of the equipment.

[0004] Therefore, in order to meet the operating requirements of inclined reversible conveying equipment, while considering saving costs and reducing floor space, it can also prevent the occurrence of backstopping during the start and stop of the equipment to ensure the safe operation of the equipment. The utility model proposes a two-way reversible backstop, which can also be used in other equipment with lifting operations. Utility Model Content

[0005] In view of this, the purpose of the utility model is to solve the bidirectional operation requirements of inclined reversible conveying equipment and to provide a bidirectional reversible check valve that can save costs, reduce floor space, meet bidirectional transportation requirements and have an anti-reversal function.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A bidirectional reversible check valve comprises a retainer arranged on a fixed support and a check mechanism arranged in the retainer; the check mechanism comprises a check disc, a guide rod, a forward pawl and a reverse pawl;

[0008] The check disc is fixedly sleeved on the transmission shaft, and the transmission shaft rotates with the retainer through a bearing; the check disc is provided with a positive ratchet and a reverse ratchet in parallel along the axial direction, and the retainer is provided with a guide hole, and the guide rod is slidably arranged in the guide hole and arranged parallel to the transmission shaft; the positive ratchet pawl and the reverse ratchet pawl are arranged on the guide rod at intervals, and correspond to the positive ratchet and the reverse ratchet respectively;

[0009] When the forward check is in progress, the guide rod is driven to slide axially, so that the forward pawl engages with the forward ratchet and the reverse pawl separates from the reverse ratchet; when the reverse check is in progress, the guide rod is driven to slide axially, so that the reverse pawl engages with the reverse ratchet and the forward pawl separates from the forward ratchet.

[0010] Furthermore, fixing rods are provided on both sides of the forward pawl and the reverse pawl, and the fixing rods are fixed on the guide rod for axially limiting the forward pawl and the reverse pawl on the guide rod; the forward pawl and the reverse pawl are rotatably mounted on the guide rod, and the forward pawl and the reverse pawl are fixedly connected by a connecting rod, and during the switching process, at least one of the forward pawl and the reverse pawl is in an engaged state, and the connecting rod is used to ensure that the forward pawl and the reverse pawl are always opposite to the tooth grooves on the forward ratchet and the reverse ratchet.

[0011] Furthermore, the guide rod is connected to a reversing driver, and the guide rod is driven to slide by the reversing driver.

[0012] Furthermore, the guide hole is a square hole or a round hole.

[0013] Furthermore, the retainer is a split combined structure, including two retainer bodies, the non-return plate is arranged between the two retainer bodies; each retainer body is rotatably matched with the transmission shaft through a bearing. The type and size of the two retainer bodies can be the same or different.

[0014] Furthermore, the forward ratchet, the reverse ratchet and the check disc are an integrated or split combined structure.

[0015] The beneficial effects of the utility model are:

[0016] The utility model has reasonable design, compact layout, simple structure and high reliability, can save costs and reduce floor space, and through the switchable ratchet pawl cooperation, it can not only meet the two-way transportation but also prevent the backstop phenomenon during the start and stop process of the equipment, thereby ensuring the safe operation of the equipment.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a vertical view of the bidirectional reversible backstop of the utility model.

[0020] Figure 2 for Figure 1 Middle AA section view.

[0021] Figure 3 for Figure 1 Middle BB section view.

[0022] Figure 4 , 5 6 is a schematic diagram of the bidirectional switching process of the check mechanism of the utility model.

[0023] Figure 7 for Figure 4 Middle CC section view.

[0024] Figure 8 for Figure 5 Middle DD section view.

[0025] Fig. 9 , 10 11 is a partial enlarged view of the bidirectional switching process of the check mechanism of the utility model.

[0026] Figure markings: 1-left retainer body; 11-left bearing; 12-left guide hole; 13-left groove; 2-right retainer body; 21-right bearing; 22-right guide hole; 23-right groove; 3-check plate; 31-forward ratchet; 32-reverse ratchet; 33-mounting hole; 4-check commutator; 41-forward pawl; 42-reverse pawl; 43-guide rod; 44-connecting rod; 45-fixing rod; 5-fixing support; 6-transmission shaft. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figures 1 to 11 , which is a bidirectional reversible check valve, comprising a retainer arranged on a fixed support 5 and a check mechanism arranged in the retainer; the check mechanism comprises a check disc 3 and a check commutator 4, and the check commutator 4 comprises a guide rod 43, a forward pawl 41 and a reverse pawl 42;

[0031] The check disc 3 is fixedly sleeved on the transmission shaft 6 through the central mounting hole, and the transmission shaft 6 is rotatably matched with the retainer through the bearing; the check disc 3 is provided with a positive ratchet 31 and a reverse ratchet 32 ​​axially arranged side by side, and the retainer is provided with a guide hole, and the guide rod 43 is slidably arranged in the guide hole and arranged parallel to the transmission shaft 6; the positive ratchet 41 and the reverse ratchet 42 are arranged on the guide rod 43 at intervals, and correspond to the positive ratchet 31 and the reverse ratchet 32 ​​one by one respectively;

[0032] When the forward check is in progress, the guide rod 43 is driven to slide axially, so that the forward pawl 41 engages with the forward ratchet 31 and the reverse pawl 42 separates from the reverse ratchet 32; when the reverse check is in progress, the guide rod 43 is driven to slide axially, so that the reverse pawl 42 engages with the reverse ratchet 32 ​​and the forward pawl 41 separates from the forward ratchet 31.

[0033] The retainer is a split assembly structure, including a left retainer body 1 and a left retainer body 1, the left retainer body 1 is provided with a left guide hole 12 and a left groove 13, and the right retainer body 2 is provided with a right guide hole 22 and a right groove 23; the two ends of the guide rod 43 are respectively located in the left guide hole 12 and the right guide hole 22, and the positive pawl 41 and the reverse pawl 42 are located in the closed space formed by the left groove 13 and the right groove 23;

[0034] The check plate 3 is arranged between the left retainer body 1 and the right retainer body 2. The left retainer body 1 and the transmission shaft 6 are rotationally matched through the left bearing 11, and the right retainer body 2 and the transmission shaft 6 are rotationally matched through the right bearing 21. The type and size of the left retainer body 1 and the right retainer body 2 can be the same or different.

[0035] The guide rod 43 is connected with a reversing driver, and the guide rod 43 is driven to slide by the reversing driver. The reversing driver can be an external hydraulic rod.

[0036] Fixed rods 45 are provided on both sides of the forward pawl 41 and the reverse pawl 42, and the fixed rods 45 are fixedly set on the guide rod 43, and are used for axially limiting the forward pawl 41 and the reverse pawl 42 on the guide rod 43; the forward pawl 41 and the reverse pawl 42 are both rotatably mounted on the guide rod 43, and the forward pawl 41 and the reverse pawl 42 are fixedly connected by a connecting rod 44 to ensure that the forward pawl 41 and the reverse pawl 42 rotate synchronously.

[0037] During the switching process, at least one of the forward pawl 41 and the reverse pawl 42 is in meshing state to achieve translational alignment with the forward ratchet 31 and the reverse ratchet 32. After the switching is completed, the forward pawl 41 or the reverse pawl 42 is in meshing state. The forward pawl 41 and the reverse pawl 42 are connected by a connecting rod 44 to ensure that the position relationship of the forward pawl 41 and the reverse pawl 42 is always opposite to the tooth grooves of the forward ratchet 31 and the reverse ratchet 32.

[0038] In this embodiment, the forward ratchet 31, the reverse ratchet 32 ​​and the check disk 3 are an integrated or split structure, and the guide hole can be a square hole or a round hole.

[0039] Specifically, the external transmission shaft 6 passes through the bidirectional reversible check valve, and is interference fit with the left bearing 11 of the left retainer body 1, the right bearing 21 of the right retainer body 2 and the check disk 3, thereby driving the check disk 3 to rotate, while the left retainer body 1 and the right retainer body 2 remain stationary. According to the operating conditions, when the equipment needs to rotate forward from the shutdown state, the reverse pawl 42 of the check valve 4 cooperates with the reverse ratchet 32, and no reverse movement occurs during the startup of the equipment; when the equipment needs to stop from the forward rotation state, the reverse pawl 42 and the reverse ratchet 32 ​​remain in cooperation; when the equipment needs to rotate reversely from the shutdown state, the check valve 4 moves and switches in advance, so that the forward pawl 41 cooperates with the forward ratchet 31, and no forward movement occurs during the startup of the equipment, thereby realizing bidirectional operation of the equipment, and at the same time having an anti-reversal function during the start-stop process.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A bidirectional reversible backstop, characterized in that: It includes a retainer arranged on a fixed support and a check mechanism arranged in the retainer; the check mechanism includes a check disc, a guide rod, a forward pawl and a reverse pawl; The check disc is fixedly sleeved on the transmission shaft, and the transmission shaft rotates with the retainer through a bearing; the check disc is provided with a positive ratchet and a reverse ratchet in parallel along the axial direction, and the retainer is provided with a guide hole, and the guide rod is slidably arranged in the guide hole and arranged parallel to the transmission shaft; the positive ratchet pawl and the reverse ratchet pawl are arranged on the guide rod at intervals, and correspond to the positive ratchet and the reverse ratchet respectively; When the forward check is in progress, the guide rod is driven to slide axially, so that the forward pawl engages with the forward ratchet and the reverse pawl separates from the reverse ratchet; when the reverse check is in progress, the guide rod is driven to slide axially, so that the reverse pawl engages with the reverse ratchet and the forward pawl separates from the forward ratchet.

2. A bidirectional reversible backstop according to claim 1, characterized in that: Fixed rods are provided on both sides of the forward pawl and the reverse pawl, and the fixed rods are fixed on the guide rod for axially limiting the forward pawl and the reverse pawl on the guide rod; the forward pawl and the reverse pawl are rotatably mounted on the guide rod, and the forward pawl and the reverse pawl are fixedly connected by a connecting rod, and during the switching process, at least one of the forward pawl and the reverse pawl is in a meshing state, and the connecting rod is used to ensure that the forward pawl and the reverse pawl are always facing the tooth grooves on the forward ratchet and the reverse ratchet.

3. A bidirectional reversible backstop according to claim 1, characterized in that: The guide rod is connected with a reversing driver, and the reversing driver drives the guide rod to slide.

4. A bidirectional reversible backstop according to claim 1, characterized in that: The guide hole is a square hole or a round hole.

5. A bidirectional reversible backstop according to claim 1, characterized in that: The retainer is a split combined structure, including two retainer bodies, and the non-return disk is arranged between the two retainer bodies; each retainer body is rotationally matched with the transmission shaft through a bearing.

6. A bidirectional reversible backstop according to claim 1, characterized in that: The forward ratchet, the reverse ratchet and the check disc are an integrated or split combined structure.

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