CN202493412U - Reciprocating type membrane pump plunger looseness-proof device - Google Patents

Abstract

The utility model discloses an anti-loosening device for a plunger of a reciprocating diaphragm pump, which is installed at the joint between a plunger rod and a cross head, and comprises an opening pressure ring, a circumferential clamping bolt, a tensioning bolt and parallel tightening double nuts. The split pressure ring described above is fixed on the plunger rod by the circumferential clamping bolts, so that the plunger rod and the split pressure ring form radial positioning; On the head, the tension bolt is fixed by parallel tightening double nuts, so that the split pressure ring is axially positioned. The utility model installs the opening pressure ring on the plunger rod, and the opening pressure ring is positioned in the circumferential direction and the axial direction. The life of the anti-loosening device is extended, and the safe operation of the reciprocating diaphragm pump is guaranteed.

Description

A plunger anti-loosening device of a reciprocating diaphragm pump

technical field

The utility model relates to a device for preventing the plunger from loosening, in particular to a device for preventing the plunger of a reciprocating diaphragm pump from being loose. the

Background technique

The reciprocating piston diaphragm pump is a new type of electromechanical integration product developed on the basis of mud pumps in the 1960s and 1970s abroad. Because of its few wearing parts, it can transport high-temperature, high-abrasion solid-liquid two-phase medium efficiently, safely, simply and without polluting the environment, so it is widely used in black, non-ferrous, chemical, building materials, coal and electric power industries. Various process systems. the

The reciprocating pump includes a power end and a liquid end. The power end is composed of a pulley, a transmission shaft, a gear, a connecting rod, a crosshead, and a main shaft with a crank; the liquid end is composed of a working cylinder, a plunger, a tie rod, a suction valve, and a discharge valve. constitute. The liquid end directly transports the liquid and converts mechanical energy into liquid pressure energy, while the power end transmits the energy of the prime mover to the liquid end. The reciprocating diaphragm pump mainly relies on the back and forth agitation of the diaphragm to achieve the purpose of sucking and discharging liquid. the

Due to the high pump speed and pressure of the reciprocating pump, some also have a plunger spray coolant system. When the rod is reciprocating during operation, it is easy to cause mutual leakage of oil and mud. Currently, the reciprocating pump commonly used at home and abroad The intermediate rod sealing device used in the diaphragm pump, after working for a period of time, due to the wear of the guide plate, the sinking of the cross head or the weak connection between the cross head and the plunger rod, it is easy to loosen, or the processing and installation errors cause the intermediate rod to Eccentric wear occurs, which eventually leads to failure of the machine seal. the

At present, the anti-loosening device at the connection between the plunger rod and the crosshead of the reciprocating diaphragm pump often fails. Usually, the connection between the plunger rod and the crosshead is mostly connected by screws. This connection method is easy to operate, but after long-term use There will be screw loosening. Although various measures can be taken to reduce loosening, the common method is to apply anaerobic adhesive to the screw and thread to make the screw firmly connected. However, this method is very inconvenient to operate, and the anaerobic adhesive is special. It is easy to stick to other parts, and may be mixed into the liquid to become impurities. Therefore, it is particularly necessary to design a reasonable plunger anti-loosening device. the

Contents of the invention

The purpose of this utility model is to provide a reciprocating diaphragm pump plunger anti-loosening device, which solves the technical problem of anti-loosening at the joint between the plunger rod and the crosshead, and uses a mechanical locking method for anti-loosening control to reduce maintenance costs and ensure Safe operation of reciprocating diaphragm pumps. the

In order to solve the above-mentioned technical problems, the technical solution that the utility model takes is:

An anti-loosening device for a plunger of a reciprocating diaphragm pump, which is installed at the joint between the plunger rod (7) and the crosshead (6), and includes an opening pressure ring (1), circumferential holding bolts (2), tension bolts (3) and tighten the double nuts (4), the opening pressure ring (1) is fixed on the plunger rod (7) by the circumferential holding bolt (2), so that the plunger rod (7) and the opening pressure ring The ring (1) forms radial positioning; the tension bolt (3) is axially installed on the split pressure ring (1), and the split pressure ring (1) is connected to the cross head (6), and the tension bolt (3) is Tighten the double nuts (4) to fix it, so that the split pressure ring (1) can be positioned axially.

The anti-loosening device of the utility model selects the opening pressure ring that is reasonably matched with the size of the plunger rod, and makes the opening pressure ring tightly hug the plunger rod and fix it by tightening the bolt in the circumferential direction, tightening the bolt in the axial direction and tightening the double nuts in parallel On the crosshead, the radial and axial positioning of the plunger rod is formed. The utility model changes the stress condition of the bolts, effectively solves the problem of anti-loosening at the connection between the plunger rod and the cross head of the reciprocating diaphragm pump, and prolongs the life of the anti-loosening device. the

The utility model can further select reasonable matching dimensions and suitable materials. the

The inner diameter of the split pressure ring is matched with the outer diameter of the plunger rod to be H7/k6, and the material is 35CrMo. The preload torque is 160N·m. the

The pre-tightening force of the tension bolts should not be too large, and the pre-tightening torque is preferably 50 N m. The material must be made of a material with good elasticity and plasticity, and stainless steel 304 is recommended. the

Locking wires are installed on the tension bolts to fix the device. the

Beneficial effects of the present utility model: The plunger anti-loosening device of the reciprocating diaphragm pump of the present utility model adopts a mechanical locking method for anti-loosening control, and an opening pressure ring is installed on the plunger rod of the reciprocating diaphragm pump, and the opening pressure ring is circumferential It is positioned by the holding bolts, and the axial direction of the opening pressure ring is positioned by the tension bolts. The structure is simple and the force is reasonable. Through reasonable matching dimensions and appropriate material selection, the problem of loosening of the joint between the plunger rod and the cross head can be prevented. It is effectively solved, prolonging the life of the anti-loosening device, reducing maintenance costs, and ensuring the safe operation of the reciprocating diaphragm pump. the

The utility model is described in detail below in conjunction with specific embodiments. The protection scope of the utility model is not limited by the specific implementation, but by the claims. the

Description of drawings

Fig. 1 is a structural schematic diagram of a plunger anti-loosening device of a reciprocating diaphragm pump. the

Fig. 2 is a right view of the plunger anti-loosening device of the reciprocating diaphragm pump described in Fig. 1 . the

It includes: an opening pressure ring 1, a circumferential holding bolt 2, a tensioning bolt 3, parallel tightening double nuts 4, an anti-loosening steel wire 5, a crosshead 6 and a plunger rod 7. the

Detailed ways

The utility model is further described in detail with the structural schematic diagram of FIG. 1 . Those skilled in the art should understand that the embodiment is only to illustrate the structure and principle of the utility model, rather than limit the scope of the utility model in any way. the

As shown in Figure 1 and Figure 2, a plunger anti-loosening device of a reciprocating diaphragm pump is installed at the junction of the plunger rod 7 and the crosshead 6, and an open pressure ring is installed on the plunger rod 7 of the reciprocating diaphragm pump 1. The split pressure ring 1 is fastened and fixed by the circumferential holding bolt 2, and its positioning with the plunger rod 7 is completed by the circumferential holding bolt 2; the tension bolt 3 is installed axially on the split pressing ring 1, and The split pressure ring 1 is connected to the crosshead 6, and the double nuts 4 are installed and tightened to fix the tension bolt 3, so that the split pressure ring 1 is axially positioned, and the anti-loosening steel wire 5 is installed on the tension bolt 3. the

The inner diameter of the split pressure ring 1 is matched with the outer diameter of the plunger rod 7 to be H7/k6. The circumferential holding bolt 2 is made of 35CrMo, and the pre-tightening torque is 160 N m. the

The tension bolt 3 is made of stainless steel 304 material, and the pre-tightening torque of the tension bolt 3 is 50 N·m. the

Claims (7)

1. reciprocating diaphragm pump plunger locking device; Be installed on the joint of plunger rod (7) and crosshead (6); It is characterized in that: described locking device comprise opening pressure ring (1), circumferentially hold tightly bolt (2), turnbuckle (3) and and tight double nut (4); Described opening pressure ring (1) is fixed on the plunger rod (7) by circumferentially holding bolt (2) tightly, makes plunger rod (7) and opening pressure ring (1) form radial location; At opening pressure ring (1) turnbuckle (3) is installed axially, and opening pressure ring (1) is connected on the crosshead (6), turnbuckle (3) is fixed by also tight double nut (4), makes opening pressure ring (1) axially locating.

2. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: described turnbuckle (3) is gone up peg wire (5) is installed.

3. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: it is H7/k6 that the internal diameter of said opening pressure ring (1) cooperates with said plunger rod (7) external diameter.

4. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: the described pre-fastening moment of circumferentially holding bolt (2) tightly is 160 Nm.

5. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: the pre-fastening moment of said turnbuckle (3) is 50 Nm.

6. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: the material selection stainless steel 304 of said turnbuckle (3).

7. reciprocating diaphragm pump plunger locking device according to claim 1 is characterized in that: the described material selection 35CrMo that circumferentially holds bolt (2) tightly.

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