Rapid tightening device for end face bolt of petroleum liquefaction pump

Abstract

The utility model relates to a quick tightening device for pump body bolts, in particular to a quick tightening device for end face bolts of a petroleum liquefaction pump, which is characterized in that a transition shaft is arranged between every two locking sleeve shafts, and gears are arranged on all the shafts; the driving mode of each shaft of the sleeve shaft is gear meshing; the circle center part of the retainer of the device is hollow; polygonal inner holes connected with a nut and a driving wrench are formed in the two ends of the locking sleeve shaft; a transition gear is arranged between the gears corresponding to the two sleeves; one side of the locking sleeve shaft 1 is connected with a driving wrench, and the other side is connected with a stud nut on the end face of the pump body; the locking sleeve shaft (1) is fixedly connected with the gear (6) through the flat key (3), and the transition shaft (9) is connected with the gear (6) through the flat key (3); and the connecting stud (11) is connected with the set screw (10) in a fastening manner. According to the device, the mode that the studs are tightened one by one in sequence is changed, the hollow linkage mechanism is creatively adopted to enable all the end face studs to be tightened at the same time, and therefore the purpose of improving the installation quality and efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to a quick tightening device for pump body bolts, in particular to a quick tightening device for end face bolts of a petroleum liquefaction pump. Background Art

[0002] Due to the high working pressure of the petroleum liquefaction pump, multiple studs are required to connect the pump cover and the pump body. Traditionally, the studs connecting the pump body and the pump cover need to be connected in sequence with tightening tools, which leads to a slow assembly speed. In addition, the existing linkage quick tightening devices are all solid designs, which will cause the tightening device to interfere with other parts during use, making it unusable. In order to speed up the assembly speed, improve efficiency, and improve adaptability, it is necessary to invent a device that can quickly tighten the pump cover studs without interfering with other parts of the pump body. Summary of the Invention

[0003] The purpose of the utility model is to provide a quick tightening device for the end face bolts of a petroleum liquefied pump, which changes the way of tightening the studs one by one in sequence and innovatively adopts a hollow linkage mechanism to allow all the end face studs to be tightened at the same time, thereby achieving the purpose of improving installation quality and efficiency.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A device for quickly tightening end face bolts of a petroleum liquefaction pump, comprising a locking sleeve shaft, an inner bearing, a flat key, an outer bearing, a retaining ring, a gear, an outer retaining frame, an inner retaining frame, a transition shaft, a set screw, and a connecting stud. A transition shaft is provided between every two locking sleeve shafts of the device, and gears are provided on all shafts. The drive mode of each sleeve shaft is gear meshing. The center portion of the retaining frame of the device is hollow. Both ends of the locking sleeve shaft must have polygonal inner holes connected to the nut and the driving wrench. A transition gear is provided between the gears corresponding to the two sleeves. One side of the locking sleeve shaft is connected to the driving wrench, and the other side is connected to the stud nut on the end face of the pump body. The locking sleeve shaft and the gear are connected and fixed by a flat key, and the transition shaft and the gear are connected by a flat key. The connecting stud is fastened to the set screw.

[0006] In the petroleum liquefaction pump end face bolt quick tightening device, the number of the locking sleeve shafts should not be less than 4 and should be an even number.

[0007] In the petroleum liquefaction pump end face bolt quick tightening device, the stud on the pump cover is connected to the sleeve, and the sleeve is connected through a gear.

[0008] In the petroleum liquefaction pump end face bolt quick tightening device, the locking sleeve shaft and the transition shaft are fixed on the outer retainer and the inner retainer through the inner bearing and the outer bearing.

[0009] The advantages and effects of the present utility model are as follows:

[0010] 1. The present utility model can ensure that all studs can be tightened simultaneously, improving work efficiency and shortening the assembly time.

[0011] 2. Since all bolts of the present utility model are tightened simultaneously, the tightening force is relatively uniform, avoiding the situation where the tightening degree of each bolt is different when tightening them one by one individually, and ensuring the installation quality.

[0012] 3. The central part of the overall structure is hollow, so that there will be no interference with other parts of the pump body during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural diagram of the quick tightening device of the present utility model;

[0014] Figure 2 is a sectional view taken along line A-A of the structural diagram of the quick tightening device of the present utility model;

[0015] Figure 3 is a partially enlarged view of C of the quick tightening device of the present utility model;

[0016] Figure 4 is a sectional view taken along line B-B of the quick tightening device of the present utility model.

[0017] Components in the figure: locking sleeve shaft 1, inner bearing 2, flat key 3, outer bearing 4, circlip 5, gear 6, outer cage 7, inner cage 8, transition shaft 9, set screw 10, connecting stud 11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings.

[0019] The torque transmission implementation structure of the entire device of the present utility model is that there is a transition shaft between every two locking sleeve shafts, and there are gears on all shafts. The rotation direction is changed through gear meshing to make the rotation direction of each sleeve shaft the same. There are no inner holes at both ends of the transition shaft and it is not connected to the nut and the driving wrench. It only serves to transmit torque, change the rotation direction, and make the rotation direction of each locking sleeve shaft consistent; the driving method between each shaft and shaft is gear meshing. The central part of the cage of the entire device is hollow to ensure no interference with other parts of the pump body. The size of the entire structure and the number of locking sleeve shafts are not fixed and should be changed according to the specific dimensions of the pump body. However, the number of locking sleeve shafts should not be less than 4 and should be an even number. There should be polygonal inner holes at both ends of the locking sleeve shaft for connection with the nut and the driving wrench, but the size and form of the holes are not fixed and should match the actual nut and driving wrench.

[0020] All studs on the pump cover of the present utility model are connected to the sleeves of the device, and all sleeves on the device are connected by gears. The power source of the driving wrench transmits the torque to each sleeve through the gears, thereby realizing the linkage operation of multiple sleeves. The center part of the overall structure is hollow, which avoids interference with other parts of the pump body.

[0021] Since the connection and transmission of two gears will cause opposite rotation directions, an intermediate gear is added between the gears corresponding to the two sleeves to ensure that the sleeves driven by each gear can work synchronously in the same rotation direction.

[0022] One side of the locking sleeve shaft 1 is connected to the driving wrench, and the other side is connected to the stud nut on the end face of the pump body. The locking sleeve shaft 1 and the gear 6 are fixedly connected by a flat key 3. The intermediate shaft 9 and the gear 6 are connected by a flat key 3. The gear 6 transmits the torque to each locking sleeve shaft 1 in sequence through gear meshing. In this way, multiple locking sleeve shafts 1 can achieve simultaneous linkage, transmit the force of the driving wrench to the nut of each pump body stud, and achieve the purpose of simultaneously tightening multiple pump body studs.

[0023] The function of the intermediate shaft 9 is to change the rotation direction so that each locking sleeve shaft 1 has the same rotation direction.

[0024] The locking sleeve shaft 1 and the intermediate shaft 9 are fixed on the outer cage 7 and the inner cage 8 by an inner bearing 2 and an outer bearing 4. The snap ring 5 is used to prevent the locking sleeve shaft 1 and the intermediate shaft 9 from having axial movement. Finally, the entire structure is fixedly connected by a connecting stud 11 and a set screw 10.

Claims

1. A device for quickly tightening the end face bolts of a petroleum liquefaction pump, characterized in that, The device includes a locking sleeve shaft (1), an inner bearing (2), a flat key (3), an outer bearing (4), a circlip (5), a gear (6), an outer cage (7), an inner cage (8), a transition shaft (9), a set screw (10), and a connecting stud (11); a transition shaft is provided between every two locking sleeve shafts of the device, and gears are provided on all the shafts; the driving mode between each shaft and shaft of the sleeve shaft is gear meshing; the center part of the cage of the device is hollow; both ends of the locking sleeve shaft should have a polygonal inner hole for connection with a nut and a driving wrench; a transition gear is arranged between the gears corresponding to the two sleeves; one side of the locking sleeve shaft (1) is connected to the driving wrench, and the other side is connected to the stud nut on the pump body end face; the locking sleeve shaft (1) and the gear (6) are fixedly connected through the flat key (3), and the transition shaft (9) and the gear (6) are connected through the flat key (3); the connecting stud (11) and the set screw (10) are tightly connected.

2. The quick tightening device for the end face bolts of a petroleum liquefaction pump according to claim 1, characterized in that, The number of the locking sleeve shafts should not be less than 4 and should be an even number.

3. A quick tightening device for the end face bolts of a petroleum liquefaction pump according to claim 1, characterized in that, The locking sleeve shaft (1) and the transition shaft (9) are fixed on the outer cage (7) and the inner cage (8) through the inner bearing (2) and the outer bearing (4).

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