Split type sliding block sealed emulsion pump plunger assembly

Abstract

The utility model relates to the technical field of plunger assemblies, in particular to a split type sliding block sealed emulsion pump plunger assembly which comprises a plunger rod, one end of the plunger rod is in threaded connection with a middle base, the end, away from the plunger rod, of the middle base is connected with a sliding rod, the other end of the sliding rod is connected with a sliding block, and a first protrusion is arranged on the outer side wall of the middle base. The outer side wall of the sliding rod is provided with a second protrusion in contact with the first protrusion, the sliding rod is connected with the middle base through a connecting piece, and the connecting piece is arranged on the outer side of the connecting position of the sliding rod and the middle base in a sleeving mode. The connecting piece comprises a first ring arranged on the sliding rod in a sleeving mode and a second ring arranged on the middle base in a sleeving mode, the first ring and the second ring are detachably connected, a clamping groove is formed in the inner side wall of the connecting piece and comprises a first groove and a second groove which are formed in the inner side wall of the first ring and the inner side wall of the second ring respectively, and the first protrusion is clamped in the first groove. According to the plunger rod, the maintenance difficulty is reduced, and the sealing performance of the plunger rod is improved.

Description

Technical Field

[0001] This utility model relates to the field of plunger assembly technology, and in particular to a split-type slider seal emulsion pump plunger assembly. Background Technology

[0002] Emulsion pumps are used in coal mining faces to provide emulsion to hydraulic supports. The working principle relies on the rotation of the crankshaft to drive the piston to reciprocate, thereby achieving liquid suction and discharge.

[0003] For example, on October 26, 2021, a patent application with publication number CN113550895A entitled "A Connection Structure for the Intermediate Rod and Piston Rod (Plunger) of a Reciprocating Pump" was disclosed. This application includes an intermediate rod, an upper connector, a spring washer, an M12 screw, a piston rod (plunger), a lower connector, an upper locking component, and a lower locking component. When tightening and loosening the M12 screw, the upper and lower connectors are easily connected together using the upper and lower locking components. The piston rod (plunger) engages with the cylindrical inner hole of the intermediate rod through an arc surface. This connection structure not only ensures high coaxiality accuracy of the intermediate rod and piston rod (plunger) after they are connected, but also ensures safe installation and disassembly of the two parts. However, the applicant discovered that the direct contact between the intermediate rod and piston rod leads to wear over time, increasing the difficulty of maintenance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a split-type slider seal emulsion pump plunger assembly to solve the problem of increased maintenance difficulty.

[0005] To achieve the above objectives, this utility model provides a split-type slider seal emulsion pump plunger assembly, including a plunger rod. One end of the plunger rod is threadedly connected to an intermediate seat. The end of the intermediate seat away from the plunger rod is connected to a sliding rod. The other end of the sliding rod is connected to a slider. The outer wall of the intermediate seat is provided with a first protrusion, and the outer wall of the sliding rod is provided with a second protrusion that contacts the first protrusion. The sliding rod and the intermediate seat are connected by a connector, which is sleeved on the outside of the connection between the sliding rod and the intermediate seat. The connector includes a first ring sleeved on the sliding rod and a second ring sleeved on the intermediate seat. The first ring and the second ring are detachably connected. The inner wall of the connector is provided with a groove, which includes a first groove and a second groove respectively provided on the inner walls of the first ring and the second ring. The first protrusion engages in the first groove, and the second protrusion engages in the second groove.

[0006] Optionally, the plunger rod has a threaded hole, and a threaded rod coaxial with the plunger rod is threadedly connected to the threaded hole. A threaded cap is provided at the end of the threaded rod away from the intermediate seat, located on one side of the plunger rod. A threaded groove that mates with the threaded rod is provided on the side of the intermediate seat facing the plunger rod.

[0007] Optionally, the plunger rod includes an inner body, the outer wall of which has an annular embedding groove, and an outer body is disposed within the embedding groove.

[0008] Optionally, the outer body is a ceramic part and the inner body is a metal part.

[0009] Optionally, the sliding rod is connected to a rotating block via a connecting rod on the side facing the slider. The rotating block includes two semi-circular structures that are in contact with each other. The slider has a receiving groove on the side facing the sliding rod. A placement groove is formed in the receiving groove. A concave pad is provided in the placement groove. The concave pad is configured to cooperate with the rotating block. A pressing block for pressing the rotating block is provided at the opening of the receiving groove. The pressing block is connected to the slider. A mating concave surface that cooperates with the rotating block is formed on the pressing block. A through-hole for the connecting rod to pass through is formed on the pressing block and communicates with the mating concave surface.

[0010] Optionally, the inner diameter of the opening is larger than the outer diameter of the connecting rod, the opening is funnel-shaped, and the diameter of the end of the opening near the mating concave surface is smaller than the diameter of the other end of the opening.

[0011] Optionally, an elastic pad is provided between the clamping block and the slider.

[0012] Optionally, the sliding rod has a mating groove that engages with the threaded connection of the connecting rod, and the rotating block is threadedly connected to the connecting rod.

[0013] The beneficial effects of this utility model are as follows: The split-type slider seal emulsion pump plunger assembly provided by this utility model reduces the difficulty of positioning the plunger rod and sliding rod through the connecting parts, which reduces the assembly difficulty. Moreover, if a part of the plunger rod, intermediate seat or sliding rod is damaged and needs to be replaced, only the damaged part needs to be replaced, which reduces the maintenance difficulty. In addition, the connecting parts enable the plunger rod to be coaxially connected to the sliding rod through the intermediate seat, which avoids uneven wear of the seal during the operation of the plunger pump and improves the sealing performance of the plunger rod. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Piston rod; 11. Inner body; 12. Outer body; 13. Threaded hole; 14. Threaded rod; 15. Threaded cap; 2. Sliding rod; 21. First protrusion; 22. First ring; 23. First groove; 3. Intermediate seat; 31. Second protrusion; 32. Second ring; 33. Second groove; 34. Threaded groove; 4. Slider; 41. Receiving groove; 42. Concave pad block; 43. Rotating block; 44. Pressing block; 45. Mating concave surface; 46. Through port. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 2As shown, a split-type slider seal emulsion pump plunger assembly includes a plunger rod 1. One end of the plunger rod 1 is threadedly connected to an intermediate seat 3. The end of the intermediate seat 3 away from the plunger rod 1 is connected to a sliding rod 2. The other end of the sliding rod 2 is connected to a slider 4. The outer wall of the intermediate seat 3 is provided with a first protrusion 21, and the outer wall of the sliding rod 2 is provided with a second protrusion 31 that contacts the first protrusion 21. The sliding rod 2 and the intermediate seat 3 are connected by a connector, which is sleeved on the sliding rod 2 and the intermediate seat 3. The outer side of the connection of seat 3; the connector includes a first ring 22 sleeved on the sliding rod 2 and a second ring 32 sleeved on the intermediate seat 3. The first ring 22 and the second ring 32 are detachably connected by a combination of screws and nuts. The inner sidewall of the connector is provided with a slot. The slot includes a first groove 23 and a second groove 33 respectively provided on the inner sidewall of the first ring 22 and the second ring 32. The first protrusion 21 is engaged in the first groove 23 and the second protrusion 31 is engaged in the second groove 33.

[0021] Compared to the existing method of directly connecting the slider 4 and the plunger rod 1 with bolts, which has the problem of difficulty in aligning the holes, the connecting piece reduces the difficulty of positioning the plunger rod 1 and the sliding rod 2, thus reducing the assembly difficulty. Moreover, if a part of the plunger rod 1, the intermediate seat 3, or the sliding rod 2 is damaged and needs to be replaced, only the damaged part needs to be replaced, reducing the maintenance difficulty. In addition, the connecting piece enables the plunger rod 1 to be coaxially connected to the sliding rod 2 through the intermediate seat 3, avoiding uneven wear on the seal during the operation of the plunger pump and improving the sealing performance of the plunger rod 1.

[0022] Protective sleeves can be fitted around the outer sides of the first ring 22 and the second ring 32. If the first ring 22 and the second ring 32 are separated, the diameters of the first ring 22 and the second ring 32 are larger than the diameters of the sliding rod 2 and the intermediate seat 3. When the plunger pump is running, the first ring 22 and the second ring 32 are still fitted on the sliding rod 2 and the intermediate seat 3 respectively when the sliding rod 2 moves, reducing the probability of the sliding rod 2 and the intermediate seat 3 contacting the inner wall of the plunger pump, and reducing the probability of damage to the inner wall of the plunger pump, the sliding rod 2, and the intermediate seat 3.

[0023] The width of the second ring 32 is greater than the width of the intermediate seat 3. When the second ring 32 is fitted onto the intermediate seat 3, the entire intermediate seat 3 is completely inside the second ring 32. A part of the plunger rod 1 is also fitted onto the second ring 32, which facilitates strengthening the connection between the intermediate seat 3 and the plunger rod 1 and reduces the possibility of radial displacement between the intermediate seat 3 and the plunger rod 1.

[0024] The plunger rod 1 has a threaded hole 13, and a threaded rod 14 coaxial with the plunger rod 1 is threadedly connected to the threaded hole 13. A threaded cap 15 located on one side of the plunger rod 1 is provided at the end of the threaded rod 14 away from the intermediate seat 3. A threaded groove 34 that mates with the threaded rod 14 is provided on the side of the intermediate seat 3 facing the plunger rod 1, so as to facilitate the threaded connection between the plunger rod 1 and the intermediate seat 3.

[0025] The plunger rod 1 includes an inner body 11, an annular embedding groove is provided on the outer side wall of the inner body 11, an outer body 12 is provided in the embedding groove, and a threaded hole 13 is provided in the inner body 11. The outer body 12 is a ceramic part and the inner body 11 is a metal part.

[0026] The sliding rod 2 is connected to the rotating block 43 via a connecting rod on the side facing the slider 4. The rotating block 43 includes two semi-circular structures that are in contact with each other. The slider 4 has a receiving groove 41 on the side facing the sliding rod 2. The receiving groove 41 has a placement groove, and a concave pad block 42 is provided in the placement groove. The concave pad block 42 is configured to cooperate with the rotating block 43. A pressing block 44 is provided at the opening of the receiving groove 41 for pressing the rotating block 43 against it. The pressing block 44 and the sliding rod 43 are connected to the rotating block 43. Block 4 is fastened together by bolts. The clamping block 44 has a mating concave surface 45 that cooperates with the rotating block 43. The clamping block 44 has a through-hole 46 that communicates with the mating concave surface 45 for the connecting rod to pass through. It can automatically adjust the position of the clamping block 44 and the rotating block 43, so that the rotating block 43 is subjected to uniform force, and can ensure that the axis of the slider 4 and the axis of the plunger rod 1 are aligned, so as to avoid uneven wear of the seal during the operation of the plunger pump, improve the sealing performance of the plunger rod 1, and increase the service life of the seal.

[0027] The inner diameter of the opening 46 is larger than the outer diameter of the connecting rod. The opening 46 is trumpet-shaped. The diameter of the end of the opening 46 near the mating concave surface 45 is smaller than the diameter of the other end of the opening 46.

[0028] An elastic pad is provided between the clamping block 44 and the slider 4.

[0029] The sliding rod 2 has a mating groove that engages with the threaded connection of the connecting rod. The rotating block 43 is also threadedly connected to the connecting rod, which facilitates the detachable connection between the sliding rod 2 and the connecting rod, and the detachable connection between the rotating block 43 and the connecting rod. This also facilitates the replacement of damaged parts and reduces maintenance difficulty.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type slider seal emulsion pump plunger assembly, comprising a plunger rod, characterized in that, One end of the plunger rod is threaded to an intermediate seat. The end of the intermediate seat away from the plunger rod is connected to a sliding rod. The other end of the sliding rod is connected to a slider. The outer wall of the intermediate seat is provided with a first protrusion, and the outer wall of the sliding rod is provided with a second protrusion that contacts the first protrusion. The sliding rod and the intermediate seat are connected by a connector. The connector is sleeved on the outside of the connection between the sliding rod and the intermediate seat. The connector includes a first ring sleeved on the sliding rod and a second ring sleeved on the intermediate seat. The first ring and the second ring are detachably connected. The inner wall of the connector is provided with a groove. The groove includes a first groove and a second groove respectively provided on the inner walls of the first ring and the second ring. The first protrusion is engaged in the first groove, and the second protrusion is engaged in the second groove.

2. The split-type slider seal emulsion pump plunger assembly according to claim 1, characterized in that, The plunger rod has a threaded hole, and a threaded rod coaxial with the plunger rod is threadedly connected to the threaded hole. A threaded cap is provided at the end of the threaded rod away from the intermediate seat, located on one side of the plunger rod. A threaded groove that mates with the threaded rod is provided on the side of the intermediate seat facing the plunger rod.

3. The split-type slider seal emulsion pump plunger assembly according to claim 1 or 2, characterized in that, The plunger rod includes an inner body, and an annular embedding groove is formed on the outer side wall of the inner body, with an outer body disposed within the embedding groove.

4. The split-type slider seal emulsion pump plunger assembly according to claim 3, characterized in that, The outer body is a ceramic component, and the inner body is a metal component.

5. The split-type slider seal emulsion pump plunger assembly according to claim 1, characterized in that, The sliding rod is connected to a rotating block via a connecting rod on the side facing the slider. The rotating block includes two semi-circular structures that are in contact with each other. The slider has a receiving groove on the side facing the sliding rod. A placement groove is formed in the receiving groove. A concave pad is provided in the placement groove. The concave pad is fitted with the rotating block. A pressing block for pressing the rotating block is provided at the opening of the receiving groove. The pressing block is connected to the slider. A mating concave surface that is fitted with the rotating block is formed on the pressing block. A through-hole for the connecting rod to pass through is formed on the pressing block and communicates with the mating concave surface.

6. The split-type slider seal emulsion pump plunger assembly according to claim 5, characterized in that, The inner diameter of the opening is larger than the outer diameter of the connecting rod. The opening is funnel-shaped, and the diameter of the end of the opening closest to the mating concave surface is smaller than the diameter of the other end of the opening.

7. The split-type slider seal emulsion pump plunger assembly according to claim 5, characterized in that, An elastic pad is provided between the clamping block and the slider.

8. The split-type slider seal emulsion pump plunger assembly according to claim 5, characterized in that, The sliding rod has a groove that engages with the threaded connection of the connecting rod, and the rotating block is threadedly connected to the connecting rod.

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