A reversing mechanism for a high-pressure sludge pump

Abstract

The utility model discloses a high-pressure sludge pump reversing mechanism, which is detachably mounted on the center of a pump barrel cover from the outside, and comprises a mounting seat, which is mounted on the pump barrel cover; an inner head, which is mounted on the inner side end of the mounting seat; a sliding rod sleeve, which is inserted on the mounting seat; a sliding rod, which is located in the sliding rod sleeve and is slidably mounted on the inner head; a limiting protrusion, a reset spring, and a sensing block are provided on the sliding rod; an outer head, which is inserted on the sliding rod sleeve; a fixing strip and a sensor are provided on the outer side of the outer head; a first sealing assembly, which has several first sealing assemblies, which are respectively arranged at the matching position between the outer head and the sliding rod sleeve, the matching position between the sliding rod sleeve and the mounting seat, the matching position between the mounting seat and the pump barrel cover, and the matching position between the inner head and the mounting seat; and a second sealing assembly, which is provided at the matching positions between the inner head, the outer head and the sliding rod. This design makes the reversing control more accurate and convenient for disassembly and assembly.

Description

Technical Field

[0001] The utility model relates to the field of sludge pumps, in particular to a reversing mechanism of a high-pressure sludge pump. Background Art

[0002] The plunger-type double-cylinder sludge pump uses hydraulic drive. There is a dual-circuit hydraulic system in the equipment, which can synchronously switch the lifting valves and differential cylinders of the two working cylinders. One working cylinder absorbs sludge during the return stroke, and the other working cylinder is in the forward stroke, pushing the sludge into the pipeline. The two working cylinders rotate, and the reversing mechanism is required during this rotation process.

[0003] The existing sludge pump reversing mechanism mainly includes a sensor, a sliding rod, a sensing block, and a rod sleeve sealing assembly. The specific structure and working principle can be found in the attached manual. Figure 3 Or a utility model patent with the authorization announcement number CN 209294014 U; after long-term use, the rod sleeve sealing assembly is prone to wear, making the fit between it and the slide rod loose, which makes the slide rod easy to move prematurely due to the sewage pressure in the working cylinder, and also makes the slide rod easy to move too fast or offside due to the push of the piston, which ultimately leads to inaccurate switching control; in addition, since the slide rod is slidably mounted on the inner cylinder heads of the two working cylinders at the same time, when disassembling and assembling the slide rod, it is necessary to first remove the cylinder head on the outer side of the corresponding working cylinder and remove the corresponding piston to achieve this, which makes the overall disassembly and assembly of the reversing mechanism inconvenient. Utility Model Content

[0004] The utility model aims to provide a high-pressure sludge pump reversing mechanism which has more accurate reversing control and is convenient for assembly and disassembly.

[0005] The purpose of the utility model is achieved as follows: a reversing mechanism for a high-pressure sludge pump; the sludge pump comprises a hydraulic cylinder, a piston rod, a piston, a pump barrel, and a pump barrel cover; the reversing mechanism is detachably mounted on the center of the pump barrel cover from the outside, and comprises a mounting seat, the mounting seat is detachably mounted on the center of the pump barrel cover; an inner head, the inner head is detachably mounted on the inside of the mounting seat, and is located at its inner side end; a slide rod sleeve, the slide rod sleeve is detachably inserted on the mounting seat, and its inner side end abuts against the inner head; a slide rod, the slide rod is located in the slide rod sleeve, and is slidably mounted on the inner head; a limiting protrusion is provided on the slide rod, and one end abuts against A reset spring on the limiting protrusion is also provided with a sensing block located at the outer end of the slide rod; an outer head, the outer head can be detachably inserted on the slide rod sleeve, and cooperates with the slide rod sliding seal; the other end of the reset spring rests on the outer head; a fixing strip is provided on the outer side of the outer head, and a sensor whose position corresponds to the sensing block is provided on the fixing strip; a first sealing component, there are several first sealing components, which are respectively arranged at the cooperation position between the outer head and the slide rod sleeve, the cooperation position between the slide rod sleeve and the mounting seat, the cooperation position between the mounting seat and the pump barrel cover, and the cooperation position between the inner head and the mounting seat; a second sealing component, the cooperation positions of the inner head, the outer head and the slide rod are all provided with second sealing components.

[0006] Compared with the prior art, the beneficial effects of the utility model are: the reversing mechanism provided by the utility model is easy to disassemble and assemble, and the reversing control is more precise; specifically, the reversing mechanism is detachably installed at the center position of the pump barrel cover from the outside, and its disassembly and assembly do not require the removal of the pump barrel cover and the piston, so it is easy to disassemble and assemble; in addition, a return spring is arranged inside it, and combined with the friction force of the second sealing assembly, it can completely offset the pressure of the sewage in the pump barrel and avoid premature movement. At the same time, a limiting protrusion is provided on the slide rod. Under the action of the return spring and the limiting protrusion, the slide rod will not be offside when moving, so the reversing control is more precise.

[0007] As a preferred solution of the utility model, the outer head and the mounting seat are each provided with a flange, and the slide sleeve is provided with two flanges; the flange of the outer head is provided with a plurality of through holes distributed centrally and symmetrically, the flange of the slide sleeve corresponding to the flange of the outer head is provided with a plurality of threaded holes distributed centrally and symmetrically, the other flange of the slide sleeve is provided with a plurality of through holes distributed centrally and symmetrically, the flange of the mounting seat is provided with a plurality of threaded holes and through holes distributed centrally and symmetrically, and the pump barrel cover is provided with a plurality of threaded holes; bolts are installed in the through holes and the threaded holes corresponding thereto. This design has a simple structure, reliable connection and fixation, and is convenient for disassembly and assembly.

[0008] Furthermore, the second sealing assembly includes, from outside to inside, a dust ring, two sealing rings, and a support ring.

[0009] Furthermore, the first sealing component is an O-ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the installation position of the reversing mechanism of the utility model in a sludge pump.

[0011] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0012] Figure 3 The figure is a schematic diagram of the installation position of the existing reversing mechanism in the sludge pump.

[0013] Among them, 1. hydraulic cylinder; 2. piston rod; 3. piston; 4. pump barrel; 5. pump barrel cover; 6. reversing mechanism; 7. mounting seat; 8. inner head; 9. slide rod sleeve; 10. slide rod; 10a. sensor block; 10b. limit protrusion; 10c. reset spring; 11. outer head; 11a. fixing strip; 11b. sensor; 12. O-ring; 13. dust ring; 14. sealing ring; 15. support ring; 16. flange; 16a. through hole; 16b. threaded hole; 17. bolt. DETAILED DESCRIPTION

[0014] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0015] Combined with Figure 1-2As shown, a reversing mechanism of a high-pressure sludge pump; the sludge pump comprises a hydraulic cylinder 1, a piston rod 2, a piston 3, a pump barrel 4, and a pump barrel cover 5; the reversing mechanism is detachably mounted on the center position of the pump barrel cover 5 from the outside, and comprises a mounting seat 7, and the mounting seat 7 is detachably mounted on the center position of the pump barrel cover 5; an inner head 8, the inner head 8 is detachably mounted inside the mounting seat 7, and is located at its inner side end; a slide rod sleeve 9, the slide rod sleeve 9 is detachably inserted on the mounting seat 7, and its inner side end abuts against the inner head 8; a slide rod 10, the slide rod 10 is located in the slide rod sleeve 9, and is slidably mounted on the inner head 8; a limiting protrusion 10b is provided on the slide rod 10, and a return spring 10c with one end abutting against the limiting protrusion 10b is also provided, and a sensing block 10a is also provided at the outer end of the slide rod 10; an outer head 11, the outer The sealing head 11 is detachably inserted on the slide rod sleeve 9 and cooperates with the slide rod 10 in a sliding and sealing manner; the other end of the above-mentioned reset spring 10c abuts against the outer sealing head 11; a fixing strip 11a is provided on the outer side of the above-mentioned outer sealing head 11, and a sensor 11b whose position corresponds to the sensing block 10a is provided on the above-mentioned fixing strip 11a; a first sealing component, the above-mentioned first sealing components have several parts, which are respectively arranged at the matching position between the outer sealing head 11 and the slide rod sleeve 9, the matching position between the slide rod sleeve 9 and the mounting seat 7, the matching position between the mounting seat 7 and the pump barrel cover 5, and the matching position between the inner sealing head 8 and the mounting seat 7, and the above-mentioned first sealing component is an O-ring 12; a second sealing component, the matching positions of the inner sealing head 8, the outer sealing head 11 and the slide rod 10 are all provided with a second sealing component, and the above-mentioned second sealing component includes a dust ring 13, two sealing rings 14, and a support ring 15 from the outside to the inside;

[0016] It should be noted that the reversing mechanism can be installed on a double-cylinder sludge pump or a single-cylinder sludge pump, as long as a mounting hole is left at the center of the pump barrel cover 5; the reversing mechanism is designed as an integral module. During installation, the mounting seat 7 of the reversing mechanism is directly inserted into the corresponding mounting hole on the pump barrel cover 5, and the installation can be achieved by fixing it with bolts 17, which makes disassembly and assembly very convenient.

[0017] A flange 16 is provided on each of the outer head 11 and the mounting seat 7, and two flanges 16 are provided on the slide rod sleeve 9; a plurality of through holes 16a symmetrically distributed are provided on the flange 16 of the outer head 11, a plurality of threaded holes 16b symmetrically distributed are provided on the flange 16 of the slide rod sleeve 9 corresponding to the outer head flange 16, a plurality of through holes 16a symmetrically distributed are provided on the other flange 16 on the slide rod sleeve 9, a plurality of threaded holes 16b symmetrically distributed are provided on the flange 16 of the mounting seat 7, and a plurality of threaded holes 16b are provided on the pump barrel cover 5; bolts 17 are installed in the through holes 16a and the threaded holes 16b corresponding thereto.

[0018] The working principle of the reversing mechanism is as follows:

[0019] When the pistons in the two pump barrels 4 start to work, the piston 3 in one pump barrel 4 moves toward the slide rod 10. When the piston 3 runs to the specified position, collides with the corresponding slide rod 10 and pushes the slide rod 10 to move, the sensing block 10a on the slide rod 10 moves accordingly. When the sensing block 10a enters the sensing area of ​​the sensor 11b, the sensor 11b feeds back the position information to the sludge pump electronic control system. The sludge pump electronic control system controls the reversal of the electromagnetic reversing valve, and the hydraulic oil circuit is reversed accordingly. The piston 3 in the hydraulic cylinder 1 is reversed and moved accordingly, and the piston 3 in the pump barrel 4 also moves in the opposite direction. At the same time, the slide rod 10 in the pump barrel 4 gradually loses the function of the piston 3, and the slide rod 10 is gradually reset under the action of the reset spring 10c. At the same time, the piston 3 in the other pump barrel 4 moves closer to the other slide rod 10. This cycle repeats itself, and the piston 3 in the pump barrel 4 moves back and forth.

[0020] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A reversing mechanism for a high-pressure sludge pump; the sludge pump comprises a hydraulic cylinder (1), a piston rod (2), a piston (3), a pump barrel (4), and a pump barrel cover (5); the characteristics are: The reversing mechanism is detachably mounted from the outside at the center of the pump barrel cover (5), and comprises A mounting seat (7), wherein the mounting seat (7) is detachably mounted at a central position of the pump barrel cover (5); An inner sealing head (8), the inner sealing head (8) being detachably mounted inside the mounting seat (7) and located at an inner side end thereof; A slide rod sleeve (9), the slide rod sleeve (9) being detachably inserted into the mounting seat (7), with its inner end abutting against the inner sealing head (8); A slide rod (10), the slide rod (10) being located in the slide rod sleeve (9) and being slidably mounted on the inner seal head (8); the slide rod (10) being provided with a limiting protrusion (10b), a return spring (10c) having one end resting on the limiting protrusion (10b), and a sensing block (10a) being located at the outer end of the slide rod (10); An outer sealing head (11), the outer sealing head (11) is detachably inserted into the slide rod sleeve (9) and cooperates with the slide rod (10) in a sliding and sealing manner; the other end of the return spring (10c) abuts against the outer sealing head (11); a fixing strip (11a) is provided on the outer side of the outer sealing head (11), and a sensor (11b) is provided on the fixing strip (11a) whose position corresponds to that of the sensing block (10a); a first sealing assembly, wherein the first sealing assembly comprises a plurality of sealing assemblies, which are respectively arranged at the matching position between the outer sealing head (11) and the sliding rod sleeve (9), the matching position between the sliding rod sleeve (9) and the mounting seat (7), the matching position between the mounting seat (7) and the pump barrel cover (5), and the matching position between the inner sealing head (8) and the mounting seat (7); A second sealing component is provided at the matching locations of the inner sealing head (8), the outer sealing head (11) and the sliding rod (10).

2. A high pressure sludge pump reversing mechanism according to claim 1, characterized in that: The outer sealing head (11) and the mounting seat (7) are each provided with a flange (16), and the sliding rod sleeve (9) is provided with two flanges (16); The flange (16) of the outer head (11) is provided with a plurality of through holes (16a) distributed symmetrically in the center, the flange (16) on the slide rod sleeve (9) corresponding to the flange (16) of the outer head is provided with a plurality of threaded holes (16b) distributed symmetrically in the center, the other flange (16) on the slide rod sleeve (9) is provided with a plurality of through holes (16a) distributed symmetrically in the center, the flange (16) of the mounting seat (7) is provided with a plurality of threaded holes (16b) and through holes (16a) distributed symmetrically in the center, and the pump barrel cover (5) is provided with a plurality of threaded holes (16b); Bolts (17) are installed in the through hole (16a) and the threaded hole (16b) corresponding thereto.

3. A high pressure sludge pump reversing mechanism according to claim 1 or 2, characterized in that: The second sealing component comprises, from the outside to the inside, a dust ring (13), two sealing rings (14), and a support ring (15).

4. A high pressure sludge pump reversing mechanism according to claim 1 or 2, characterized in that: The first sealing component is an O-ring (12).

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