Automatic pressing liquid packing sealing device for pump

Abstract

The utility model relates to an automatic pressing liquid packing sealing device for a pump. The automatic pressing liquid packing sealing device comprises a packing gland, a packing box, a self-tightening spring device and the like. A filler is arranged between the filler box and the pump shaft and comprises an upper-layer ramie filler, a middle liquid filler and a lower-layer ramie filler, a channel for filling the liquid filler is reserved on the filler box, one end of the channel is connected with the middle liquid filler, and the other end of the channel is provided with a liquid filler filling plug; a trace exhaust valve is arranged on the stuffing box; and the self-tightening spring device is fixed on the packing gland. The liquid filler is a main wear consumable, plays a main sealing role, is very soft, does not damage the rotor shaft, and plays a role in protecting the rotor. And the automatic exhaust function is achieved. When the service time is longer and longer and the sealing effect is reduced, the liquid filler can be supplemented through the liquid filler filling port under the condition that the machine is not stopped and parts are not disassembled, so that the overhaul period of filler sealing is prolonged, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to an automatic compression liquid packing sealing device for a pump, which can be filled with liquid packing during the operation of a water pump to improve the sealing effect, and can also quickly and efficiently complete the overall maintenance of the packing seal when the pump is shut down but without disassembling parts such as a motor, thereby shortening the maintenance cycle and reducing the operation and maintenance costs. Background Art

[0002] Packing seal refers to a dynamic sealing device that creates a compression force between the packing and the rotating parts and fixed parts to achieve a sealing effect. It is a commonly used sealing form on pumps and is widely used. Compared with other dynamic sealing devices, its main advantages are easy installation and low cost. However, the packing seal currently used in pumps also has significant disadvantages. The specific problems are:

[0003] First, when the packing needs to be replaced, the packing gland needs to be removed, which requires the coupling at the shaft end and even the motor to be removed before the packing can be replaced, which results in a relatively long cycle and a relatively high cost for disassembling the coupling, motor and other parts;

[0004] Second, as the unit is used, the packing will inevitably wear out. When the packing is worn, it is often necessary to manually tighten the adjusting bolts to compress the packing. If it is not done in time, it will cause medium leakage, which will bring hidden dangers to the safe operation of the unit.

[0005] Third, the materials currently used for packing seals, such as ramie, are relatively hard. When the unit is running, the friction with the rotor shaft causes great damage to the shaft. It is often the case that during maintenance, when other parts of the shaft system are intact, the shaft needs to be replaced because the contact point between the shaft and the packing is worn by the packing, which is too costly. Utility Model Content

[0006] In view of the above problems, the main purpose of the utility model is to provide an automatic compression liquid packing sealing device for pumps, which can be used to add liquid packing during the operation of the water pump to improve the sealing effect. It can also quickly and efficiently complete the overall maintenance of the packing seal when the pump is shut down but without disassembling parts such as the motor, thereby shortening the maintenance cycle and reducing the operating and maintenance costs.

[0007] The utility model solves the above technical problems through the following technical scheme: a pump automatic compression liquid packing sealing device, the pump automatic compression liquid packing sealing device comprises: a packing gland, a packing box, a self-tightening spring device, and a liquid packing filling plug; the packing gland adopts a half-structure, a packing is arranged between the packing box and the pump shaft, the packing comprises an upper ramie packing, a middle liquid packing, and a lower ramie packing, a channel for filling the liquid packing is reserved on the stuffing box, one end of the channel is connected with the middle liquid packing, and the other end is equipped with the liquid packing filling plug; a micro exhaust valve is installed on the stuffing box; the self-tightening spring device is fixed to the packing gland by fasteners.

[0008] In a specific implementation example of the utility model, the two halves of the packing gland with a split-half structure are detachably fixed together by using split-half fastening bolts.

[0009] In a specific implementation example of the present utility model, the fastener is an adjusting bolt.

[0010] In a specific implementation example of the utility model, the micro-exhaust valve and the liquid filler filling plug are distributed on both sides of the stuffing box.

[0011] The positive progressive effect of the utility model is that the automatic compression liquid packing sealing device for the pump proposed by the utility model adopts liquid packing as the packing seal as the main wear medium of the packing seal, and its soft characteristics greatly reduce the wear on the rotor shaft, greatly reduce the maintenance and replacement cycle and cost of the rotor shaft, even if the liquid packing is worn and consumed, the liquid packing can be supplemented through the filling port without stopping the machine, so as to give full play to the efficiency of the unit.

[0012] The utility model designs the packing gland into a half structure, so that when the unit is running to the point where the packing must be replaced, the fastening bolts at the half of the packing gland can be loosened, and the packing gland can be taken out of the rotor in two halves, thereby conveniently and quickly inspecting and replacing the packing, solving the current situation in which the motor, coupling and other parts need to be disassembled to remove the packing gland from the top of the main shaft, greatly shortening the cycle and cost of replacing the packing.

[0013] The utility model also adds a self-tightening spring device. Even if the packing will inevitably wear out as the unit is used, when the packing is worn, the self-tightening spring device will use the rebound force of the compressed spring to push the packing gland toward the packing, thereby automatically tightening the packing gland and ensuring the sealing effect of the packing. The purpose of maintenance-free is truly achieved, and the risks and hidden dangers caused by medium leakage due to packing wear are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] The following are the names corresponding to the label numbers in this utility model:

[0016] Packing gland 1, upper ramie packing 2, middle liquid packing 3, lower ramie packing 4, trace exhaust valve 5, adjusting bolt 6, self-tightening spring device 7, half-tightening bolt 8, liquid packing filling plug 9, stuffing box 10. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model, such as Figure 1 As shown: the automatic compression liquid packing sealing device for pumps proposed by the utility model comprises: a packing gland 1, a packing box 10, a self-tightening spring device 7, and a liquid packing filling plug 9; the packing gland 1 adopts a split-half structure, and a packing is arranged between the packing box 10 and the pump shaft, and the packing comprises an upper ramie packing 2, a middle liquid packing 3, and a lower ramie packing 4. A channel for filling the liquid packing is reserved on the packing box 10, one end of the channel is connected to the middle liquid packing 3, and the other end is equipped with the liquid packing filling plug 9; a micro exhaust valve 5 is installed on the packing box 10; the self-tightening spring device 7 is fixed to the packing gland 1 by a fastener, and the fastener is an adjusting bolt 6. The two halves of the packing gland with a split-half structure are detachably fixed together by split-half fastening bolts.

[0019] When the utility model is installed, the two halves of the packing gland are connected by the half-fastening bolts 8. When checking and replacing the packing, after loosening the half-fastening bolts 8, the packing gland can be divided into two halves so as to be conveniently and quickly removed from the shaft.

[0020] The upper ramie filler 2, the middle liquid filler 3 and the lower ramie filler 4 constitute a filler part. When the unit is running, the middle liquid filler part is mainly worn and consumed.

[0021] The core of the self-tightening spring device 7 is a compressed spring. In the initial installed state, the spring is in a compressed state. As the liquid filler wears, the spring pushes the packing gland 1 toward the packing under the action of the rebound force, thereby automatically compressing the packing gland.

[0022] A channel for filling liquid filler is reserved on the stuffing box 10, one end of which is connected to the middle liquid filler 3, and the other end is equipped with a liquid filler filling plug 9. When the liquid filler is lost, it is only necessary to unscrew the liquid filler filling plug 9 and complete the process of replenishing the liquid filler through the liquid filler filling channel without stopping the machine, which is convenient and quick.

[0023] The stuffing box 10 is provided with a micro exhaust valve 5, which can exhaust the gas in the stuffing device when the liquid stuffing 3 is added, so as to facilitate the filling of the liquid stuffing and avoid the inclusion of bubbles in the liquid stuffing.

[0024] In the utility model, the micro-exhaust valve 5 and the liquid filler filling plug 9 are distributed on both sides of the stuffing box 10, which is convenient for operation.

[0025] The utility model adopts liquid filler as the wear medium of the packing seal as the main packing seal. Its soft characteristics greatly reduce the wear on the rotor shaft, greatly reduce the cycle and cost of repairing and replacing the rotor shaft, even if the liquid filler is worn and consumed, it can be replenished through the filling port without stopping the unit, so as to give full play to the efficiency of the unit.

[0026] The utility model designs the packing gland into a half structure, so that when the unit is running to the point where the packing must be replaced, the fastening bolts at the half of the packing gland can be loosened, and the packing gland can be taken out of the rotor in two halves, thereby conveniently and quickly inspecting and replacing the packing, solving the current situation in which the motor, coupling and other parts need to be disassembled to remove the packing gland from the top of the main shaft, greatly shortening the cycle and cost of replacing the packing.

[0027] The utility model also adds a self-tightening spring device. Even if the packing will inevitably wear out as the unit is used, when the packing is worn, the self-tightening spring device will use the rebound force of the compressed spring to push the packing gland toward the packing, thereby automatically tightening the packing gland and ensuring the sealing effect of the packing. The purpose of maintenance-free is truly achieved, and the risks and hidden dangers caused by medium leakage due to packing wear are avoided.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic compression liquid packing sealing device for a pump, characterized in that: The automatic compression liquid packing sealing device for the pump comprises: a packing gland, a packing box, a self-tightening spring device, and a liquid packing filling plug; the packing gland adopts a half-structure, a packing is arranged between the packing box and the pump shaft, the packing comprises an upper ramie packing, a middle liquid packing, and a lower ramie packing, a channel for filling the liquid packing is reserved on the stuffing box, one end of the channel is connected to the middle liquid packing, and the other end is equipped with the liquid packing filling plug; a micro exhaust valve is installed on the stuffing box; the self-tightening spring device is fixed to the packing gland by fasteners.

2. The automatic compression liquid packing sealing device for a pump according to claim 1, characterized in that: The two halves of the half-structured packing gland are detachably fixed together by half-fastening bolts.

3. The automatic compression liquid packing sealing device for a pump according to claim 1, characterized in that: The fastener is an adjusting bolt.

4. The automatic compression liquid packing sealing device for a pump according to claim 1, characterized in that: The micro-exhaust valve and liquid packing filling plug are distributed on both sides of the stuffing box.

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