High-universality roller backstop

Abstract

The utility model discloses a high versatility roller backstop which comprises a backstop main body, a backstop star wheel is rotatably installed on the outer wall of the backstop main body, the backstop star wheel extends out of the outer wall of the backstop main body and is provided with a plurality of slots along the circumferential direction, the free end of the backstop star wheel is provided with an external shaft sleeve, and the external shaft sleeve is provided with a pin shaft. A plurality of inserting blocks are arranged on the outer wall of the end, opposite to the backstop star wheel, of the external shaft sleeve in the circumferential direction, and the inserting blocks are inserted into the inserting grooves in a sliding mode to ensure that an integral channel is formed by the external shaft sleeve and an inner cavity of the backstop star wheel. In actual use, the high-universality roller backstop can quickly and conveniently change the overall shaft hole length of equipment, when a shaft of external equipment is too long, the contact area between the shaft hole and the shaft can be increased, the external shaft is prevented from being damaged by too large twisting force, and when backstop is carried out, the backstop force can be buffered, too large external force is avoided, and the service life of the backstop is prolonged. And the installation of the equipment is loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of backstops, in particular to a highly universal roller backstop. Background Art

[0002] In order to ensure the safety of equipment and personnel during shutdown or sudden power outage, it is becoming more and more common to install check devices on operating parts, and there are more and more types of check devices; common ones include belt check devices, wedge check bearings, ratchet pawl check devices with tension and compression springs, etc., which have indeed played their due roles in production for a long period of time; among them, the roller check device is the most common type of check device, but the existing check devices have a fixed thickness, and most of the check devices have a limited thickness, which leads to a limited contact area between the shaft hole of the roller check device star wheel and the shaft of the external device. If the length of the exposed shaft of the external device is too long, the contact area ratio between the check device and the external shaft is small. When there is a large reverse force, the small contact area with the shaft can easily cause the external shaft to break or deform. Moreover, the shaft hole thickness of the existing roller check device cannot be changed, and its versatility is small, which will bring inconvenience to use. Based on the above problems, a highly versatile roller check device is proposed. Utility Model Content

[0003] The utility model aims to provide a highly versatile roller check valve to solve the problem in the background art that the shaft hole thickness of the existing roller check valve cannot be adjusted and cannot meet the use requirements of longer external shafts.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a highly versatile roller check valve, comprising: a check valve body, a check valve star wheel is rotatably mounted on the outer wall of the check valve body, the check valve star wheel extends out of the outer wall of the check valve body and is circumferentially provided with a plurality of slots, the free end of the check valve star wheel is equipped with an external shaft sleeve, the outer wall of the external shaft sleeve and the check valve star wheel at an end opposite to each other is circumferentially provided with a plurality of plug blocks, and the plug blocks are slidably inserted in the slots to ensure that the external shaft sleeve and the inner cavity of the check valve star wheel form an integral passage.

[0005] Preferably, the outer wall of the check star wheel is provided with threads, the outer wall of the check star wheel is screwed to a limiting cylinder, and the free end of the insert block is provided with a limiting block for limiting the limiting cylinder.

[0006] Preferably, a blind groove is formed on the outer wall of the insert block, and the outer wall of the limit block is slidably embedded in the inner cavity of the blind groove, one end of a spring is installed on the outer wall of the limit block, and the other end of the spring is installed on the inner wall of the blind groove.

[0007] Preferably, the outer wall of the limiting block on the side opposite to the backstop body is arranged as an inclined surface.

[0008] Preferably, a connecting frame is installed at the bottom end of the check valve body, and a base is sleeved on the bottom end of the outer wall of the connecting frame. A fixing rod is installed through the outer wall of the base, and the fixing rod passes through the connecting frame and is embedded in the outer wall of the inner cavity part of the base. Buffer rubber pads are installed on the left and right sides of the outer wall of the inner cavity part of the base, and the outer wall of the buffer rubber pad fits the inner wall of the base.

[0009] Preferably, a through hole is formed on the outer wall of the connecting frame, the fixing rod passes through the inner cavity of the through hole, and a gap is left between the outer wall of the fixing rod and the inner wall of the through hole.

[0010] Preferably, the through hole is arranged in an arc shape, and the circle where the through hole is located is coaxial with the center of the backstop star wheel.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the highly versatile roller check valve, by inserting the plug block into the inner cavity of the slot, the check valve star wheel and the external shaft sleeve form a whole, and the shaft holes and keyways of the two are corresponding, the plug block is limited by the threaded movement of the limit cylinder, the external shaft sleeve is firmly connected, and the movement of the limit cylinder is prevented by the limitation of the limit block, and the torsional force transmitted from the connecting frame is buffered by the buffer rubber pad to prevent the base installation from being loose due to excessive rotational force during the check process. In actual use, the overall shaft hole length of the equipment can be changed quickly and conveniently. When the shaft of the external equipment is too long, the contact area between the shaft hole and the shaft can be increased to prevent the external shaft from being damaged by excessive torsional force. The check force can also be buffered during the check process to prevent the equipment from being loose due to excessive external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the installation state of the external shaft sleeve of the utility model.

[0014] Figure 3 This is a front cross-sectional view of the external shaft sleeve of the utility model.

[0015] Figure 4 It is a cross-sectional view of the base of the utility model.

[0016] Figure 5 It is an enlarged view of point A of the present utility model.

[0017] In the figure: 1. check valve body, 2. check valve star wheel, 3. slot, 4. external shaft sleeve, 5. plug-in block, 6. limit cylinder, 7. limit block, 8. blind groove, 9. spring, 10. connecting frame, 11. base, 12. fixing rod, 13. through hole, 14. buffer rubber pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 The utility model provides a technical solution of a highly universal roller check valve: a highly universal roller check valve, comprising: a check valve body 1, a check valve star wheel 2 is rotatably mounted on the outer wall of the check valve body 1, the check valve star wheel 2 is a standard component in a universal roller check valve, and at the same time, the check valve star wheel 2 can rotate, and the inner wall of the check valve star wheel 2 is provided with a keyway, which can be adapted to the spline of the external shaft, and the check valve star wheel 2 extends out of the outer wall of the check valve body 1 and is provided with a plurality of slots 3 along the circumferential direction, and the check valve star wheel 2 is provided with a plurality of slots 3 along the circumferential direction. The free end is equipped with an external sleeve 4, and the inner wall of the external sleeve 4 is provided with a keyway of the same type as the keyway of the inner wall of the backstop star wheel 2. The outer wall of the external sleeve 4 and the backstop star wheel 2 are opposite to each other. A plurality of plug blocks 5 are arranged along the circumferential direction, and the plug blocks 5 are slidably inserted in the slot 3 to ensure that the external sleeve 4 and the inner cavity of the backstop star wheel 2 form an integral passage, and the keyways are relatively aligned after the two are connected. The outer wall of the backstop star wheel 2 is provided with a thread, and the outer wall of the backstop star wheel 2 is screwed with a limiting cylinder 6, and the limiting cylinder 6 can rotate along the backstop The outer wall of the star wheel 2 moves axially. When the limiting cylinder 6 moves to the outer wall of the plug block 5, the plug block 5 can be limited to prevent the plug block 5 from radial expansion. The free end of the plug block 5 is installed with a limiting block 7 for limiting the limiting cylinder 6. The outer wall of the plug block 5 is provided with a blind groove 8, and the outer wall of the limiting block 7 is slidably embedded in the inner cavity of the blind groove 8. The outer wall of the limiting block 7 on the opposite side to the backstop body 1 is set as an inclined surface. When the limiting block 7 is inserted into the inner cavity of the slot 3 with the plug block 5, the limiting cylinder 6 can be used to limit the limiting block 7. It is retracted into the inner cavity of the blind groove 8. At the same time, when the limiting cylinder 6 is located on the side of the limiting block 7 opposite to the inclined surface, it can be limited so that the limiting cylinder 6 cannot move back. One end of a spring 9 is installed on the outer wall of the limiting block 7, and the other end of the spring 9 is installed on the inner wall of the blind groove 8. The spring 9 is a coil spring, which produces elastic deformation when stretched or squeezed, and returns to its initial state after the external force is removed. When the limiting block 7 is retracted into the inner cavity of the blind groove 8 under force, the spring 9 can be compressed. After the external force is removed, the elastic force of the spring 9 can be used to reset the limiting block 7.

[0020] As a preferred solution, further, a connecting frame 10 is installed at the bottom end of the check valve body 1, and the bottom end of the outer wall of the connecting frame 10 is sleeved with a base 11, and the inner cavity of the base 11 is adapted to the bottom end of the outer wall of the connecting frame 10. The connecting frame 10 is located in the inner cavity of the base 11. The left and right sides of the outer wall of the base 11 are respectively installed with buffer rubber pads 14, and the outer wall of the buffer rubber pad 14 fits the inner wall of the base 11. When the connecting frame 10 has a left and right tendency due to the torsional force, the buffer rubber pad 14 will be squeezed, and the buffer rubber pad 14 will be used for buffering by its own elastic force. The outer wall of the base 11 is penetrated by a fixing rod. 12, and the fixing rod 12 passes through the outer wall of the inner cavity part of the connecting frame 10 and is embedded in the base 11. The fixing rod 12 can be used to stably install the connecting frame 10 in the inner cavity of the base 11. The outer wall of the connecting frame 10 is provided with a through hole 13, and the fixing rod 12 passes through the inner cavity of the through hole 13, and a gap is left between the outer wall of the fixing rod 12 and the inner wall of the through hole 13. Displacement compensation can be performed using the small gap, wherein the through hole 13 is arranged in an arc shape, and the circle where the through hole 13 is located is coaxial with the center of the check star wheel 2, which is adapted to the path of rotation of the connecting frame 10 under the torsional force of the equipment to avoid interference.

[0021] The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0022] When in use, the external shaft sleeve 4 is docked with the backstop star wheel 2, and several plug blocks 5 are inserted into the inner cavity of the limit block 7, so that the inner cavity of the external shaft sleeve 4 is connected with the inner cavity of the slot 3 and the key slot is relatively aligned. In this process, due to the limiting effect of the outer wall of the limit block 7, the limit block 7 will shrink into the inner cavity of the blind groove 8 and compress the spring 9, and then the limit cylinder 6 is rotated to move it until it covers the outer wall of the plug block 5 to limit the plug block 5. When the outer wall of the limit cylinder 6 is separated from the limit block 7, the elastic force of the spring 9 is used to reset the limit block 7, thereby limiting the limit cylinder 6 to prevent the limit cylinder 6 from moving back and preventing the external shaft sleeve 4 from detaching, thereby increasing the length of the overall shaft hole. During the rotation, the rollers in the equipment are stressed to stop the reverse rotation of the check star wheel 2. This process has a large reverse force, and the equipment as a whole has a rotational force. At this time, the connecting frame 10 rotates slightly, and the buffer rubber pad 14 is used for buffering. At the same time, the fixing rod 12 rotates in the gap of the through hole 13 for displacement compensation, thereby buffering the rotational force and avoiding loose installation. In actual use, it can not only quickly and conveniently increase the axial length of the shaft hole, ensure that the longer shaft is effectively supported after insertion, and avoid the shaft from being twisted off or damaged during the check, but also buffer the torsional force to avoid the large reverse force causing the equipment to be loosely installed, thereby ensuring the overall stability of the equipment.

[0023] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "center position", "other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and 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 orientation, be constructed and operated in a specific orientation; at the same time, unless otherwise clearly specified and limited, the terms "snapping", "plugging", "welding", "installation", "setting", "interference fit", "screw connection", "pin connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly versatile roller check valve, characterized in that: include: A check valve body (1), wherein a check valve star wheel (2) is rotatably mounted on the outer wall of the check valve body (1), wherein the check valve star wheel (2) extends out of the outer wall of the check valve body (1) and is provided with a plurality of slots (3) along the circumferential direction, wherein the free end of the check valve star wheel (2) is equipped with an external shaft sleeve (4), wherein the outer wall of the external shaft sleeve (4) opposite to the check valve star wheel (2) is provided with a plurality of plug blocks (5) along the circumferential direction, and the plug blocks (5) are slidably plugged into the slots (3) to ensure that the external shaft sleeve (4) and the inner cavity of the check valve star wheel (2) form an integral passage.

2. A highly versatile roller backstop according to claim 1, characterized in that: The outer wall of the backstop star wheel (2) is provided with threads, the outer wall of the backstop star wheel (2) is threadedly connected to a limiting cylinder (6), and the free end of the insert block (5) is provided with a limiting block (7) for limiting the limiting cylinder (6).

3. A highly versatile roller backstop according to claim 2, characterized in that: The outer wall of the insert block (5) is provided with a blind groove (8), and the outer wall of the limit block (7) is slidably embedded in the inner cavity of the blind groove (8), one end of a spring (9) is installed on the outer wall of the limit block (7), and the other end of the spring (9) is installed on the inner wall of the blind groove (8).

4. A highly versatile roller backstop according to claim 3, characterized in that: The outer wall of the limit block (7) on the side opposite to the backstop body (1) is arranged as an inclined surface.

5. A highly versatile roller backstop according to any one of claims 1 to 4, characterized in that: A connecting frame (10) is installed at the bottom end of the check valve body (1), and a base (11) is sleeved at the bottom end of the outer wall of the connecting frame (10). A fixing rod (12) is installed through the outer wall of the base (11), and the fixing rod (12) penetrates the connecting frame (10) and is embedded in the outer wall of the inner cavity of the base (11). Buffer rubber pads (14) are installed on the left and right sides of the outer wall of the inner cavity of the base (11), and the outer wall of the buffer rubber pad (14) fits the inner wall of the base (11).

6. A highly versatile roller backstop according to claim 5, characterized in that: The outer wall of the connecting frame (10) is provided with a through hole (13), the fixing rod (12) passes through the inner cavity of the through hole (13), and a gap is left between the outer wall of the fixing rod (12) and the inner wall of the through hole (13).

7. A highly versatile roller backstop according to claim 6, characterized in that: The through hole (13) is arranged in an arc shape, and the circle where the through hole (13) is located is coaxial with the center of the backstop star wheel (2).

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