Sealing device for plunger pump

Abstract

The sealing device for the plunger pump comprises a plunger sleeve, a sealing gland, an arc-shaped clamping plate and a pressing ring, the sealing gland is arranged above the plunger sleeve, a second center hole is formed in the center of the plunger sleeve, a plunger is arranged in the second center hole in a penetrating mode, a movable chamber is arranged in the upper end of the plunger sleeve, and the arc-shaped clamping plate is arranged in the movable chamber. A second annular groove is formed in the lower portion of the movable chamber and formed in the plunger sleeve, a rubber sealing sleeve is arranged in the movable chamber and sleeves the plunger, the lower end of the rubber sealing sleeve is arranged in the second annular groove, and a pressing ring is arranged on the outer ring of the rubber sealing sleeve. Wherein the pressing ring is clamped between the rubber sealing sleeve and the second annular groove, the rubber sealing sleeve can be tightly attached to the plunger through the pressing ring, a limiting plate is fixedly connected to the upper end of the pressing ring, clamping grooves are formed in the left side and the right side of the plunger sleeve correspondingly, circular grooves are formed in one sides of the clamping grooves correspondingly, and the circular grooves are formed in the plunger sleeve correspondingly. And pushing circular plates are arranged in the circular grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a sealing device for plunger pumps. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. It is widely used in high pressure, large flow and flow regulation occasions, such as hydraulic presses, engineering machinery and ships.

[0003] The prior art can ensure the sealing effect between the plunger and the plunger sleeve by a sealing device, but the existing sealing device has a single structure, a poor sealing effect, and cannot achieve multiple sealing. Therefore, those skilled in the art provide a sealing device for a plunger pump to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing device for a plunger pump to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sealing device for a plunger pump comprises a plunger sleeve, a sealing gland, an arc-shaped clamping plate and a clamping ring, wherein a sealing gland is arranged above the plunger sleeve, a second center hole is arranged in the center of the plunger sleeve, a plunger is penetrated in the second center hole, an activity chamber is arranged inside the upper end of the plunger sleeve, a second annular groove is arranged below the activity chamber, wherein the second annular groove is arranged on the plunger sleeve, a rubber sealing sleeve is arranged in the activity chamber, wherein the rubber sealing sleeve is sleeved on the plunger, and the lower end of the rubber sealing sleeve is arranged in the second annular groove, a clamping ring is arranged on the outer ring of the rubber sealing sleeve, wherein the clamping ring is clamped between the rubber sealing sleeve and the second annular groove, the clamping ring can make the rubber sealing sleeve fit tightly with the plunger, thereby ensuring the sealing effect of the rubber sealing sleeve, the upper end of the clamping ring is fixedly connected to a limiting plate, clamping grooves are arranged on the left and right sides of the plunger sleeve, and circular grooves are arranged on one side of the clamping groove, wherein the circular grooves are arranged on the plunger sleeve, and pushing circular plates are arranged in the circular grooves.

[0007] As a further solution of the utility model: one end of the pushing circular plate is fixedly connected to a connecting column, wherein the connecting column is movably connected to the plunger sleeve, and a connecting piece is provided at the other end of the connecting column, one side of the connecting piece is fixedly connected to the connecting column, and the other side of the connecting piece is fixedly connected to an arc-shaped clamping plate, wherein the arc-shaped clamping plate is arranged in the movable chamber and located on the left and right sides of the rubber sealing sleeve.

[0008] As a further solution of the utility model: an annular slot is provided at the upper end of the plunger sleeve, and a protruding insert ring is provided at the lower end of the sealing cover, wherein the protruding insert ring is inserted in the annular slot, and clamping blocks are provided on both sides of the protruding insert ring, wherein the clamping blocks are fixed on the inner walls on the left and right sides of the sealing cover, and the clamping blocks are clamped on the clamping slot.

[0009] As a further solution of the utility model: a first center hole is arranged in the center of the sealing cover, wherein the upper end of the plunger passes through the first center hole, and a rubber sealing ring is arranged on the inner wall of the first center hole, wherein the outer ring of the rubber sealing ring is clamped in the sealing cover, and the inner ring of the rubber sealing ring is tightly fitted with the plunger.

[0010] As a further solution of the utility model: a first annular groove is arranged below the rubber sealing ring, wherein the first annular groove is arranged on the sealing cover, and the upper end of the rubber sealing sleeve is clamped in the first annular groove, and a plurality of sets of fixing screws are arranged above the sealing cover, wherein the fixing screws are threadedly connected to the sealing cover and the plunger sleeve.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The sealing gland can be installed on the plunger sleeve to ensure that the upper end of the plunger sleeve is in a sealed state. The sealing gland can be initially fixed on the plunger sleeve by clamping the block on the clamping groove, and the sealing gland can be further fixed on the plunger sleeve by fixing screws. The protruding plug ring is inserted in the annular slot to improve the sealing degree between the sealing gland and the plunger sleeve. In addition, the rubber sealing ring ensures the sealing degree between the sealing gland and the plunger.

[0013] 2. Then push the circular plate inward to drive the connecting column to move, and the connecting column drives the connecting piece and the arc-shaped clamping plate to move. The arc-shaped clamping plate will clamp the rubber sealing sleeve to make it fit more closely with the plunger. In addition, the arc-shaped clamping plate also supports the rubber sealing sleeve to limit it to remain in the specified position.

[0014] 3. After the final compression ring is inserted into the second annular groove, it will squeeze the rubber sealing sleeve toward the middle, thereby making the rubber sealing sleeve and the plunger fit more closely and enhancing the sealing effect. In addition, the activity chamber can store a certain amount of leaked liquid and reduce the impact on other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a sealing device for a plunger pump.

[0016] Figure 2 The present invention is a structural schematic diagram of a cross-sectional view of a sealing device for a plunger pump.

[0017] Figure 3The present invention is a schematic structural diagram of a sealing gland and a first annular groove in a sealing device for a plunger pump.

[0018] Figure 4 The present invention is a schematic structural diagram of a plunger sleeve and a second annular groove in a sealing device for a plunger pump.

[0019] Figure 5 The present invention is a schematic diagram of the structure of a rubber sealing sleeve and a clamping ring in a sealing device for a plunger pump.

[0020] Figure 6 The present invention is a schematic structural diagram of an arc-shaped clamping plate and a connecting column in a sealing device for a plunger pump.

[0021] In the figure: 1- plunger, 2- plunger sleeve, 3- sealing cover, 4- fixing screw, 5- rubber sealing ring, 6- circular groove, 7- pushing circular plate, 8- clamping ring, 9- rubber sealing sleeve, 10- movable chamber, 11- clamping block, 12- first annular groove, 13- clamping groove, 14- arc splint, 15- connecting piece, 16- limiting plate, 17- second center hole, 18- second annular groove, 19- first center hole, 20- connecting column, 21- protruding plug ring, 22- annular slot. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with the specific implementation methods. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] See also Figures 1 to 6In the embodiment of the utility model, a sealing device for a plunger pump includes a plunger sleeve 2, a sealing gland 3, an arc-shaped clamping plate 14 and a clamping ring 8, wherein a sealing gland 3 is arranged above the plunger sleeve 2, a second center hole 17 is arranged at the center of the plunger sleeve 2, a plunger 1 is penetrated through the second center hole 17, an activity chamber 10 is arranged inside the upper end of the plunger sleeve 2, a second annular groove 18 is arranged below the activity chamber 10, wherein the second annular groove 18 is arranged on the plunger sleeve 2, a rubber sealing sleeve 9 is arranged in the activity chamber 10, wherein the rubber sealing sleeve 9 is sleeved on the plunger 1, and the lower end of the rubber sealing sleeve 9 is arranged in the second annular groove 18, the outer ring of the rubber sealing sleeve 9 is provided with a clamping ring 8, wherein the clamping ring 8 is clamped between the rubber sealing sleeve 9 and the second annular groove 18, and the clamping ring 8 can make the rubber sealing sleeve 9 fit closely with the plunger 1, thereby ensuring the sealing effect of the rubber sealing sleeve 9, and the upper end of the clamping ring 8 is fixedly connected to the limit plate 16, and the left and right sides of the plunger sleeve 2 are provided with a clamping groove 13, and one side of the clamping groove 13 is provided with a circular groove 6, wherein the circular groove 6 is provided on the plunger sleeve 2, and a push circular plate 7 is provided in the circular groove 6, and one end of the push circular plate 7 is fixedly connected with a connecting column 20, wherein the connecting column 20 is movably connected to the plunger sleeve 2, a connecting piece 15 is provided at the other end of the connecting column 20, one side of the connecting piece 15 is fixedly connected to the connecting column 20, and the other side of the connecting piece 15 is fixedly connected to an arc-shaped clamping plate 14, wherein the arc-shaped clamping plate 14 is arranged in the activity chamber 10 and is located on the left and right sides of the rubber sealing sleeve 9, an annular slot 22 is provided at the upper end of the plunger sleeve 2, and a protruding plug-in ring 21 is provided at the lower end of the sealing gland 3, wherein the protruding plug-in ring 21 is inserted in the annular slot 22, and a card block 11 is provided on both sides of the protruding plug-in ring 21, wherein the card block 11 is fixed on the inner walls on the left and right sides of the sealing gland 3, and the card block 11 is clamped in the card slot 1 3, a first center hole 19 is provided at the center of the sealing gland 3, wherein the upper end of the plunger 1 passes through the first center hole 19, a rubber sealing ring 5 is provided on the inner wall of the first center hole 19, wherein the outer ring of the rubber sealing ring 5 is clamped in the sealing gland 3, and the inner ring of the rubber sealing ring 5 is tightly fitted with the plunger 1, a first annular groove 12 is provided below the rubber sealing ring 5, wherein the first annular groove 12 is provided on the sealing gland 3, and the upper end of the rubber sealing sleeve 9 is clamped in the first annular groove 12, and a plurality of sets of fixing screws 4 are provided above the sealing gland 3, wherein the fixing screws 4 are threadedly connected to the sealing gland 3 and the plunger sleeve 2.

[0024] The working principle of the utility model is as follows: first, the sealing gland 3 can be installed on the plunger sleeve 2, wherein the sealing gland 3 can be initially fixed on the plunger sleeve 2 by the clamping block 11 clamped on the clamping groove 13, and then the sealing gland 3 can be further fixed on the plunger sleeve 2 by the fixing screw 4, wherein the protruding insert ring 21 is inserted into the annular slot 22, thereby improving the sealing degree between the sealing gland 3 and the plunger sleeve 2, and in addition, the rubber sealing ring 5 ensures the sealing degree between the sealing gland 3 and the plunger 1, and then the circular plate 7 is pushed inward to drive the connecting column 20 to move The connecting column 20 drives the connecting piece 15 and the arc-shaped clamping plate 14 to move. The arc-shaped clamping plate 14 will clamp the rubber sealing sleeve 9 to make it fit more closely with the plunger 1. In addition, the arc-shaped clamping plate 14 also supports the rubber sealing sleeve 9 to limit it to remain in a specified position. Finally, after the clamping ring 8 is inserted into the second annular groove 18, it will squeeze the rubber sealing sleeve 9 toward the middle, thereby making the rubber sealing sleeve 9 fit more closely with the plunger 1 and enhancing its sealing effect. In addition, the activity chamber 10 can store a certain amount of leaked liquid to reduce the impact on other structures.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sealing device for a plunger pump, comprising a plunger sleeve (2), a sealing gland (3), an arc-shaped clamping plate (14) and a clamping ring (8), characterized in that: A sealing gland (3) is arranged above the plunger sleeve (2), a second center hole (17) is arranged at the center of the plunger sleeve (2), a plunger (1) is arranged through the second center hole (17), an activity chamber (10) is arranged inside the upper end of the plunger sleeve (2), a second annular groove (18) is arranged below the activity chamber (10), wherein the second annular groove (18) is arranged on the plunger sleeve (2), a rubber sealing sleeve (9) is arranged in the activity chamber (10), wherein the rubber sealing sleeve (9) is sleeved on the plunger (1), and the lower end of the rubber sealing sleeve (9) is arranged in the second annular groove (18), a clamping ring (8) is arranged on the outer ring of the rubber sealing sleeve (9), wherein the clamping ring (8) is clamped between the rubber sealing sleeve (9) and the second annular groove (18), the upper end of the clamping ring (8) is fixedly connected to a limiting plate (16), and clamping grooves (13) are arranged on both sides of the plunger sleeve (2).

2. A sealing device for a plunger pump according to claim 1, characterized in that: A circular groove (6) is provided on one side of the clamping groove (13), wherein the circular groove (6) is provided on the plunger sleeve (2), and a pushing circular plate (7) is provided in the circular groove (6).

3. A sealing device for a plunger pump according to claim 2, characterized in that: One end of the pushing circular plate (7) is fixedly connected to a connecting column (20), wherein the connecting column (20) is movably connected to the plunger sleeve (2), and the other end of the connecting column (20) is provided with a connecting piece (15).

4. A sealing device for a plunger pump according to claim 3, characterized in that: One side of the connecting member (15) is fixedly connected to the connecting column (20), while the other side of the connecting member (15) is fixedly connected to an arc-shaped clamping plate (14), wherein the arc-shaped clamping plate (14) is arranged in the activity chamber (10) and is located on the left and right sides of the rubber sealing sleeve (9).

5. A sealing device for a plunger pump according to claim 1, characterized in that: The upper end of the plunger sleeve (2) is provided with an annular slot (22), and the lower end of the sealing gland (3) is provided with a protruding insert ring (21), wherein the protruding insert ring (21) is inserted into the annular slot (22).

6. A sealing device for a plunger pump according to claim 5, characterized in that: The protruding insert ring (21) is provided with clamping blocks (11) on both sides thereof, wherein the clamping blocks (11) are fixedly mounted on the inner walls on both sides thereof and the sealing gland (3), and the clamping blocks (11) are clamped on the clamping grooves (13).

7. A sealing device for a plunger pump according to claim 1, characterized in that: A first center hole (19) is provided at the center of the sealing gland (3), wherein the upper end of the plunger (1) passes through the first center hole (19).

8. A sealing device for a plunger pump according to claim 7, characterized in that: A rubber sealing ring (5) is arranged on the inner wall of the first central hole (19), wherein the outer ring of the rubber sealing ring (5) is clamped in the sealing gland (3), and the inner ring of the rubber sealing ring (5) is tightly fitted with the plunger (1).

9. A sealing device for a plunger pump according to claim 8, characterized in that: A first annular groove (12) is provided below the rubber sealing ring (5), wherein the first annular groove (12) is provided on the sealing gland (3), and the upper end of the rubber sealing sleeve (9) is clamped in the first annular groove (12).

10. A sealing device for a plunger pump according to claim 1, characterized in that: A plurality of sets of fixing screws (4) are arranged above the sealing gland (3), wherein the fixing screws (4) are threadedly connected to the sealing gland (3) and the plunger sleeve (2).

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