CN213392539U - S valve assembly, pumping system and engineering machinery - Google Patents

Abstract

The present disclosure relates to an S valve assembly, a pumping system and an engineering machine, the S valve assembly includes: a rotating shaft (1) for passing through a mounting hole (811) of a rear wall plate (81) of the hopper (8); the rocker arm is connected to one end, extending out of the hopper (8), of the rotating shaft (1); the sleeve (2) is sleeved on the rotating shaft (1); the first sealing element (31) is used for sealing a gap between the rotating shaft (1) and the sleeve (2), and the first sealing element (31) is sleeved on the rotating shaft (1) and abutted against the end face of the first end, extending into the hopper (8), of the sleeve (2); and a gland (32) which presses the first sealing member (31) against the end face of the first end and against the outer peripheral surface of the rotary shaft (1). Through above-mentioned technical scheme, S valve assembly, pumping system and engineering machine tool that this disclosure provided can solve the material seepage' S in the hopper technical problem.

Description

S valve assembly, pumping system and engineering machinery

Technical Field

The disclosure relates to the field of concrete pumping, in particular to an S valve assembly, a pumping system and engineering machinery.

Background

In order to realize continuous pumping in the pumping process of the concrete pump, a distribution valve is adopted to realize steering. The commonly used distribution valve in the field is the S valve, which is located in the hopper connecting the delivery cylinder and the delivery pipe. When the concrete pump works, the rocker arm drives the rotary central shaft of the S valve to frequently and rapidly rotate in a small angle, so that the S valve is in butt joint with the two concrete cylinders in turn, and the continuous conveying of the concrete is realized.

In practical use, concrete materials or water in the hopper can easily flow out of the outer side of the hopper through the outer surface of the rotating shaft and enter the rocker arm through a gap between the rotating shaft and the rocker arm, so that the rotating shaft and the rocker arm are rusted and worn, and the service life of the rocker arm is influenced.

In the related art, in order to solve the problem, a sleeve is usually sleeved on the rotating shaft, and a sealing element is sleeved between the rotating shaft and the sleeve, however, the sealing effect of the sealing element is not ideal, the sealing element is easy to rub against the outer circumferential surface of the rotating shaft and the inner circumferential surface of the sleeve during application, so that the self-abrasion of the sealing element is serious, and the S-valve still has the problem of concrete material leakage.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide an S valve assembly, pumping system and engineering machine tool to solve the technical problem of material seepage in the hopper.

To achieve the above object, the present disclosure provides an S-valve assembly including: the rotating shaft is used for penetrating through the mounting hole of the rear wall plate of the hopper; the rocker arm is connected to one end, extending out of the hopper, of the rotating shaft; the sleeve is sleeved on the rotating shaft; the first sealing element is used for sealing a gap between the rotating shaft and the sleeve, is sleeved on the rotating shaft and abuts against the end face of the first end, extending into the hopper, of the sleeve; and the gland presses the first sealing element to the end face of the first end and to the peripheral surface of the rotating shaft.

Optionally, the gland has: the first shaft section is sleeved on the rotating shaft and tightly presses the first sealing element to the end face of the first end; and the second shaft section is sleeved on the sleeve, and the inner peripheral surface of the second shaft section presses the first sealing element to the outer peripheral surface of the rotating shaft.

Alternatively, an inner circumferential surface of the second shaft section is formed with an internal thread, an outer circumferential surface of the sleeve is formed with an external thread that is fitted with the internal thread, and the second shaft section is threadedly coupled with the sleeve through the internal thread and the external thread.

Optionally, a first threaded hole is formed in the outer wall of the sleeve along the radial direction of the sleeve, a second threaded hole corresponding to the first threaded hole is formed in the second shaft section, and the S-valve assembly further comprises a threaded fastener which sequentially penetrates through the second threaded hole and the first threaded hole to connect the gland and the sleeve.

Optionally, a locking nut is screwed to the end of the rotating shaft, which extends out of the hopper, and the locking nut can tightly push the rocker arm against the rear wall plate.

Optionally, the bearing is sleeved on the sleeve and is installed in the installation hole through a bearing seat.

Optionally, a boss capable of abutting against the rear wall plate is formed on one side of the bearing seat extending out of the hopper, and a second sealing element is arranged between the boss and the rear wall plate.

Optionally, the bearing seat comprises a first portion directly fitted over the sleeve and a second portion fitted over the bearing; the S-valve assembly further includes a third seal disposed between the sleeve and the first portion.

Optionally, a second end of the sleeve extending out of the hopper is formed with a flange, the flange abuts against the rocker arm, and a fourth sealing member is disposed between the flange and the rocker arm.

On the basis of the technical scheme, the present disclosure further provides a pumping system, which includes the S valve assembly in the technical scheme.

On the basis of the technical scheme, the disclosure also provides engineering machinery comprising the pumping system in the technical scheme.

Through the technical scheme, the first sealing element in the S valve assembly provided by the disclosure is sleeved on the rotating shaft and abutted against the end face of the first end of the sleeve, so that the first sealing element cannot rub against the outer peripheral surface of the rotating shaft and the sleeve during assembly, the structural damage of the first sealing element caused by friction can be avoided, and the sealing structure integrity of the first sealing element can be ensured. In addition, under the action of the pressing force of the end surfaces of the pressing cover and the first end of the sleeve on the first sealing element along the axial direction of the rotating shaft and the action of the pressing force of the outer peripheral surface of the pressing cover and the rotating shaft on the first sealing element along the radial direction of the rotating shaft, the first sealing element is deformed along the axial direction and the radial direction and fills a gap between the end surface of the first end of the sleeve and the rotating shaft, so that the axial and radial two-way composite sealing effect is achieved. The pumping system provided by the present disclosure has the same technical effect as the S valve assembly in the above technical solution, and is not described herein in detail to avoid unnecessary repetition. The engineering machine provided by the present disclosure has the same technical effect as the pumping system in the above technical solution, and is not described herein in detail to avoid unnecessary repetition.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic diagram of an S-valve assembly assembled to a pumping system in accordance with an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of an S-valve assembly in an embodiment of the present disclosure;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a partially enlarged view at B in fig. 2.

Description of the reference numerals

1-rotating shaft, 2-sleeve, 21-flange, 31-first sealing element, 32-gland, 321-first shaft section, 322-second shaft section, 33-threaded fastener, 41-bearing, 42-bearing seat, 421-first part, 422-second part, 423-boss, 43-bearing cover, 5-locking nut, 6-second sealing element, 7-third sealing element, 71-Y type sealing ring, 72-dust ring, 8-hopper, 81-rear wall plate, 811-mounting hole, 9-rocker, 91-lubricating channel, 92-fourth sealing element and 93-fifth sealing element.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" means inner and outer relative to the profile of the corresponding component part itself, unless otherwise specified. Terms such as "first," "second," and the like, are used herein to distinguish one element from another, and are not necessarily sequential or significant. Furthermore, in the following description, when referring to the drawings, like reference numbers in different drawings denote like elements.

According to an embodiment of the present disclosure, there is provided an S-valve assembly, as shown with reference to fig. 1 and 2, including a rotating shaft 1, a rocker arm 9, a sleeve 2, a first seal member 31, and a gland 32. Wherein, when the S valve assembly is assembled on the hopper 8, the rotating shaft 1 can pass through the mounting hole 811 of the rear wall plate 81 of the hopper 8; a swing arm 9 connected to an end of the rotation shaft 1 protruding out of the hopper 8 and fixed opposite to the rotation shaft 1 to perform a rotation motion of the rotation shaft 1 by driving the swing arm 9, the swing arm 9 may be constructed in a hollow structure formed as a lubrication passage 91 through which a lubricating oil passes; the sleeve 2 is fixedly sleeved on the rotating shaft 1, the first sealing element 31 is sleeved on the rotating shaft 1 and abuts against the end face of the first end, extending into the hopper 8, of the sleeve 2 so as to seal a gap between the rotating shaft 1 and the sleeve 2; the gland 32 can press the first seal member 31 against the end surface of the first end of the sleeve 2 and against the outer circumferential surface of the rotating shaft 1.

Through the technical scheme, the first sealing element 31 in the S valve assembly provided by the disclosure is sleeved on the rotating shaft 1 and abutted against the end face of the first end of the sleeve 2, so that the first sealing element 31 cannot rub against the outer peripheral surface of the rotating shaft 1 and the sleeve 2 during assembly, the structural damage of the first sealing element 31 caused by rubbing can be avoided, and the sealing structure integrity of the first sealing element 31 can be ensured. In addition, under the action of the pressing force of the end face of the gland 32 and the first end of the sleeve 2 on the first sealing element 31 along the axial direction of the rotating shaft 1 and the action of the pressing force of the gland 32 and the outer periphery of the rotating shaft 1 on the first sealing element 31 along the radial direction of the rotating shaft 1, the first sealing element 31 is deformed along the axial direction and the radial direction and fills the gap between the end face of the first end of the sleeve 2 and the rotating shaft 1, so that the bidirectional composite sealing effect along the axial direction and the radial direction is achieved.

In particular embodiments of the present disclosure, the gland 32 may be configured in any suitable manner. Alternatively, referring to fig. 1 to 3, the gland 32 may include a first shaft section 321 fitted over the rotating shaft 1 and a second shaft section 322 fitted over the sleeve 2, the first shaft section 321 being capable of pressing the first seal member 31 against the end surface of the first end of the sleeve 2, and the inner circumferential surface of the second shaft section 322 being capable of pressing the first seal member 31 against the outer circumferential surface of the rotating shaft 1. A space capable of accommodating the first sealing member 31 is formed between the first shaft section 321, the second shaft section 322, the end surface of the first end of the sleeve 2 and the outer peripheral surface of the rotating shaft 1, and the first sealing member 31 is pressed in the axial direction of the rotating shaft 1 by the first shaft section 321 and the end surface of the first end of the sleeve 2, and the second shaft section 322 and the outer peripheral surface of the rotating shaft 1 are pressed in the radial direction of the rotating shaft 1 facing the first sealing member 31, so that the first sealing member 31 realizes a radial and axial two-way composite seal for the gap between the sleeve 2 and the rotating shaft 1.

In order to enable the gland 32 to be relatively fixed with the sleeve 2, as an alternative, as shown in fig. 3, an inner circumferential surface of the second shaft section 322 may be formed with an internal thread, an outer circumferential surface of the first end of the sleeve 2 may be formed with an external thread to be engaged with the internal thread, and the second shaft section 322 and the sleeve 2 may be threadedly engaged with each other through the internal thread and the external thread. In assembling, the gland 32 and the first sealing member 31 may be fitted to the rotating shaft 1, the sleeve 2 may be assembled to the rotating shaft 1, and the first sealing member 31 between the gland 32 and the sleeve 2 may be compressed by rotating the gland 32 so that the gland 32 is screwed and fixed to the sleeve 2.

Alternatively, referring to fig. 3, the first end of the sleeve 2 may be provided with a first threaded hole along a radial direction thereof, the second shaft section 322 is provided with a second threaded hole corresponding to the first threaded hole, and the first threaded hole and the second threaded hole may be configured as follows: when the axes of the first and second threaded holes are collinear, the first seal 31 is compressed and a two-way compound seal is achieved. By sequentially passing the threaded fastener 33 through the second threaded hole and the first threaded hole, relative fixation between the gland 32 and the sleeve 2 can be achieved, so that the compressed state of the first seal member 31 can be maintained. It should be noted that, in order to ensure the reliability of the connection between the gland 32 and the sleeve 2, the connection between the gland 32 and the sleeve 2 through the internal and external screw connections and the fixed connection through the threaded fastener 33 may exist at the same time, so as to avoid the connection failure between the gland 32 and the sleeve 2, wherein the threaded fastener 33 may be a set screw.

In order to fix the swing arm 9 and the rotating shaft 1 relatively, referring to fig. 1 and 2, a lock nut 5 may be screwed on an end of the rotating shaft 1, which extends out of the hopper 8, and the lock nut 5 may push the swing arm 9 against the rear wall plate 81, so that the swing arm 9 and the rotating shaft 1 are relatively fixed in the axial direction and the circumferential direction of the rotating shaft 1, and the swing arm 9 may drive the rotating shaft 1 to rotate around its own central axis when swinging in a plane perpendicular to the central axis of the rotating shaft 1. The swing arm 9 and the rear wall plate 81 can be sequentially pressed against each other by a flange 21 and a boss 423 described below, as shown in fig. 1, 2, and 4.

In order to rotatably mount the sleeve 2 and the rotation shaft 1 in the mounting hole 811, as shown in fig. 1 to 4, the S-valve assembly may further include a bearing 41 fitted over the sleeve 2, and the bearing 41 may be mounted in the mounting hole 811 through a bearing housing 42. Specifically, the inner ring of the bearing 41 is fixedly connected with the sleeve 2, the outer ring of the bearing 41 is fixedly connected with the bearing seat 42, and the sleeve 2 and the rotating shaft 1 are rotatably mounted through the rotation of the inner ring of the bearing 41 relative to the outer ring.

In order to prevent the material flow in the hopper 8 from leaking from the gap between the bearing seat 42 and the back wall plate 81, as shown in fig. 2 and 4, a boss 423 capable of abutting against the back wall plate 81 may be formed on one side of the bearing seat 42 extending out of the hopper 8, and a second sealing member 6 may be disposed between the boss 423 and the back wall plate 81, as shown in fig. 4, when the boss 423 is pressed against the back wall plate 81, the second sealing member 6 may seal the gap between the boss 423 and the back wall plate 81 to prevent the material flow in the hopper 8 from leaking.

In order to realize the sealing between the sleeve 2 and the bearing 41, referring to fig. 2 to 4, the bearing seat 42 may include a first portion 421 directly sleeved on the sleeve 2 and a second portion 422 sleeved on the bearing 41, and a third sealing member 7 may be disposed between the sleeve 2 and the first portion 421, wherein a sealing groove for accommodating the third sealing member 7 may be disposed on the first portion 421, the third sealing member 7 may include a dust ring 72 disposed near an end of the bearing seat 42 extending into the hopper 8 and a Y-shaped sealing ring 71 disposed near the bearing 41, and the dust ring 72 and the Y-shaped sealing ring 71 are matched with each other, so as to prevent the material in the hopper 8 from flowing into gaps between the sleeve 2 and the bearing seat 42 and between the sleeve 2 and the bearing 41. The end of the bearing seat 42 extending into the hopper 8 may be provided with a bearing cap 43, and the bearing cap 43 can be retracted from the gland 32 and be in clearance fit with the gland 32.

In order to seal the gap between the swing arm 9 and the rotating shaft 1 and the lubrication passage 91, as shown in fig. 2 and 4, the second end of the sleeve 2 protruding outside the hopper 8 may be formed with a flange 21, the flange 21 abuts against the swing arm 9, a fourth sealing member 92 may be provided between the swing arm 9 and the flange 21, and further, a fifth sealing member 93 may be provided between the swing arm 9 and the lock nut 5 as shown in fig. 2, when flange 21 and rocker arm 9 are pressed against each other by lock nut 5, fourth seal 92 and fifth seal 93 are able to seal the gap between rocker arm 9 and flange 21 and the gap between rocker arm 9 and lock nut 5, respectively, to avoid leakage of lubricating oil, meanwhile, external impurities can be prevented from entering the lubricating channel 91 and gaps between the rocker arm 9 and the rotating shaft 1, so that rusting and abrasion of the rocker arm 9 and the rotating shaft 1 are avoided.

According to the above embodiment, the flange 21 and the boss 423 are disposed between the swing arm 9 and the back wall plate 81, so that the swing arm 9 can be pressed against the back wall plate 81 through the flange 21 and the boss 423, further, as shown in fig. 4, the end portions of the flange 21 and the bearing 41 can be axially limited through the stepped structure, and the end surface of the bearing 41 is pressed against the flange 21, that is, the swing arm 9, the flange 21, the bearing 41, the boss 423 of the bearing seat 42, and the back wall plate 81 are sequentially pressed, so that the sleeve 2, the bearing 41, the bearing seat 42, and the revolving shaft 1 are axially fixed relatively.

In order to limit the circumferential position between the sleeve 2 and the rotating shaft 1, the sleeve 2 and the rotating shaft 1 may be connected by splines so that the sleeve 2 can rotate together with the rotating shaft 1.

In addition, the first seal 31, the second seal 6, the fourth seal 92, and the fifth seal 93 described in the above embodiments may be O-ring seals, but the present disclosure is not limited thereto.

When the S-valve assembly of the present disclosure is assembled with the hopper 8, the rotating shaft 1 may first pass through the mounting hole 811, the gland 32 and the first sealing member 31 are preassembled on the rotating shaft 1, then the bearing 41 and the bearing seat 42 are installed in the mounting hole 811, then the sleeve 2 is sleeved on the rotating shaft 1 with the first end of the sleeve 2 extending into the hopper 8, then the rocker arm 9 is connected with the rotating shaft 1 and locked by the locking nut 5, the gland 32 is screwed with the first end of the sleeve 2 to compress the first sealing member 31, the threaded fastener 33 passes through the second threaded hole and the first threaded hole to relatively fix the gland 32 and the sleeve 2 in the axial direction, and finally the bearing cover 43 is installed at one end of the bearing 42 extending into the hopper 8.

On the basis of the technical scheme, the present disclosure further provides a pumping system, which includes the S valve assembly in the technical scheme.

Through the technical scheme, the pumping system provided by the disclosure has the same technical effect as the S valve assembly in the technical scheme, and unnecessary repetition is avoided, so that the details are not repeated.

On the basis of the technical scheme, the disclosure also provides engineering machinery comprising the pumping system in the technical scheme.

Through the technical scheme, the engineering machine provided by the disclosure has the same technical effect as the pumping system in the technical scheme, and is not repeated herein in order to avoid unnecessary repetition.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (11)

1. An S-valve assembly comprising:

a rotating shaft (1) for passing through a mounting hole (811) of a rear wall plate (81) of the hopper (8);

the rocker arm (9) is connected to one end, extending out of the hopper (8), of the rotating shaft (1);

the sleeve (2) is sleeved on the rotating shaft (1); and

a first sealing member (31) for sealing a gap between the rotating shaft (1) and the casing (2),

the S-shaped valve assembly is characterized in that the first sealing element (31) is sleeved on the rotating shaft (1) and abutted against the end face of the first end, extending into the hopper (8), of the sleeve (2), and the S-shaped valve assembly further comprises:

and the gland (32) is used for pressing the first sealing element (31) to the end surface of the first end and the outer peripheral surface of the rotating shaft (1).

2. The S-valve assembly of claim 1, wherein the gland (32) has:

the first shaft section (321) is sleeved on the rotating shaft (1), and the first sealing element (31) is tightly pressed on the end face of the first end by the first shaft section (321); and

and the second shaft section (322) is sleeved on the sleeve (2), and the inner circumferential surface of the second shaft section (322) presses the first sealing element (31) to the outer circumferential surface of the rotating shaft (1).

3. The S-valve assembly according to claim 2, wherein an inner circumferential surface of the second shaft section (322) is formed with an internal thread, an outer circumferential surface of the sleeve (2) is formed with an external thread that is engaged with the internal thread, and the second shaft section (322) is threadedly engaged with the sleeve (2) through the internal thread and the external thread.

4. The S-valve assembly according to claim 2 or 3, wherein a first threaded hole is formed in the outer wall of the sleeve (2) along the radial direction of the sleeve, a second threaded hole corresponding to the first threaded hole is formed in the second shaft section (322), and the S-valve assembly further comprises a threaded fastener (33), wherein the threaded fastener (33) sequentially penetrates through the second threaded hole and the first threaded hole to connect the gland (32) and the sleeve (2).

5. The S-valve assembly according to claim 1, wherein a locking nut (5) is screwed on the end of the rotating shaft (1) extending out of the hopper (8), and the locking nut (5) can tightly push the rocker arm (9) to the rear wall plate (81).

6. The S-valve assembly according to claim 1 or 5, further comprising a bearing (41) fitted over the sleeve (2), the bearing (41) being mounted in the mounting hole (811) through a bearing seat (42).

7. The S-valve assembly according to claim 6, characterized in that a side of the bearing seat (42) extending out of the hopper (8) is formed with a boss (423) capable of abutting against the back wall plate (81), and a second seal (6) is provided between the boss (423) and the back wall plate (81).

8. The S-valve assembly according to claim 6, wherein the bearing seat (42) comprises a first portion (421) directly fitted over the sleeve (2) and a second portion (422) fitted over the bearing (41); the S-valve assembly further comprises a third seal (7) arranged between the sleeve (2) and the first part (421).

9. S-valve assembly according to claim 1 or 5, characterized in that the second end of the sleeve (2) protruding outside the hopper (8) is formed with a flange (21), which flange (21) abuts the rocker arm (9), and a fourth seal (92) is arranged between the flange (21) and the rocker arm (9).

10. A pumping system comprising the S-valve assembly of any one of claims 1-9.

11. A working machine comprising a pumping system, characterized in that the pumping system is a pumping system according to claim 10.

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