Plunger adjusting assembly and plunger pump

Abstract

The utility model discloses a plunger adjusting assembly and a plunger pump, and relates to the technical field of plungers. According to the main technical scheme, a mounting groove is formed in a sliding block; the boss structure is attached to the bottom of the mounting groove, a first gap is formed between the boss structure and the wall of the mounting groove, and the first gap is used for reserving a space for the boss structure to move in the radial direction of the mounting groove; the plunger rod is connected to the end, away from the bottom of the mounting groove, of the boss structure. The plunger rod is sleeved with the pressing piece, a second gap is formed between the pressing piece and the plunger rod, and the second gap is used for reserving a space for the plunger rod to move in the radial direction of the pressing piece; the pressing piece is connected to the sliding block and attached to the boss structure. The purposes of adjusting the coaxiality of the plunger rod and the cylinder body, reducing the abrasion risk of the plunger rod, prolonging the service life of the plunger rod and improving the normal use probability of the plunger pump are expected to be achieved. And meanwhile, in the displacement process of the plunger rod, the coaxiality between the plunger rod and the sliding block is effectively ensured, and then the aims of reducing the risks of inclination, bending, breakage and abrasion of the plunger rod are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plunger technical field, concretely relates to a plunger adjusting assembly and plunger pump. BACKGROUND

[0002] The plunger rod and the sliding block of the existing plunger pump are mostly connected by plane, so that the plunger rod is difficult to realize radial movement. When the coaxiality of the plunger rod and the cylinder body is low, the plunger rod is prone to wear during axial reciprocating movement, thereby shortening the service life of the plunger rod and affecting the normal use of the plunger pump. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a plunger adjusting assembly and plunger pump to solve the problem that the existing plunger rod is prone to wear during axial reciprocating movement, thereby shortening the service life of the plunger rod and affecting the normal use of the plunger pump.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] In the first aspect, a plunger adjusting assembly is provided, which includes a sliding block, a boss structure, a plunger rod, and a compression piece. One end of the sliding block is provided with a mounting groove. The boss structure is attached to the bottom of the mounting groove. A first gap is provided between the boss structure and the groove wall of the mounting groove. The first gap is used to reserve the space for the radial displacement of the boss structure along the mounting groove. The plunger rod is connected to the end of the boss structure away from the bottom of the mounting groove. The compression piece is sleeved on the plunger rod. A second gap is provided between the compression piece and the plunger rod. The second gap is used to reserve the space for the radial displacement of the plunger rod along the compression piece. The compression piece is connected to the sliding block, and the compression piece is attached to the end of the boss structure away from the bottom of the mounting groove.

[0006] In a further technical solution, the width of the first gap is equal to the width of the second gap.

[0007] In a further technical solution, a first annular sheath is provided between the groove wall of the mounting groove and the side wall of the boss structure. The inner wall of the first annular sheath is attached to the boss structure, or the outer wall of the first annular sheath is attached to the groove wall of the mounting groove.

[0008] In a further technical solution, a second annular sheath is provided between the compression piece and the plunger rod. The inner wall and the outer wall of the second annular sheath are respectively attached to the compression piece and the plunger rod, and the second annular sheath is used to stretch and contract in the direction from the compression piece to the plunger rod.

[0009] Further, the mounting groove is provided with a ball between the groove bottom and the boss structure.

[0010] Further, the boss structure is provided with a containing groove at one end close to the mounting groove bottom, the containing groove extends along the radial direction of the boss structure, a plurality of containing grooves are evenly arranged around the axis of the boss structure, and each containing groove is provided with the ball, and the ball is attached to the groove bottom of the mounting groove at the side away from the containing groove bottom.

[0011] Further, the diameter of the ball is greater than the width of the containing groove opening, and the ball center is located in the containing groove.

[0012] In the second aspect, a plunger pump is provided, and the plunger pump comprises the plunger adjusting assembly as in the first aspect.

[0013] Compared with the prior art, the plunger adjusting assembly has the following beneficial effects:

[0014] When the coaxiality between the plunger rod and the cylinder body is low, the second gap between the plunger rod and the compression part allows the plunger rod to displace along the radial direction of the compression part during the axial reciprocating movement of the plunger rod, so as to adjust the coaxiality between the plunger rod and the cylinder body, thereby reducing the risk of wear of the plunger rod, prolonging the service life of the plunger rod, and improving the probability of normal use of the plunger pump. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a sectional view of a plunger adjusting assembly according to the present embodiment;

[0016] Figure 2 FIG. 3 is a structural schematic view of a boss structure of a plunger adjusting assembly according to the present embodiment.

[0017] In the drawings, the following marks and corresponding component names are used:

[0018] 1- slider; 2- mounting groove; 3- boss structure; 4- first gap; 5- plunger rod; 6- compression part; 7- second gap; 8- first annular sheath; 9- second annular sheath; 10- ball; 11- containing groove. DETAILED DESCRIPTION

[0019] The utility model is further described below with reference to the drawings.

[0020] Embodiment 1

[0021] The embodiment provides a plunger adjusting assembly, which comprises a slider 1, a boss structure 3, a plunger rod 5 and a pressing part 6. Figure 1 As shown in the figure, the slider 1 is provided with a mounting groove 2 at one end; the boss structure 3 is attached to the groove bottom of the mounting groove 2, and a first gap 4 is arranged between the boss structure 3 and the groove wall of the mounting groove 2, which is used for reserving the space for the radial displacement of the boss structure 3 along the mounting groove 2; the plunger rod 5 is connected to the end of the boss structure 3 away from the groove bottom of the mounting groove 2; the pressing part 6 is sleeved on the plunger rod 5, and a second gap 7 is arranged between the pressing part 6 and the plunger rod 5, which is used for reserving the space for the radial displacement of the plunger rod 5 along the pressing part 6; the pressing part 6 is connected to the slider 1, and the pressing part 6 is attached to the end of the boss structure 3 away from the groove bottom of the mounting groove 2.

[0022] For example, the slider 1 is provided with a mounting groove 2 at one end.

[0023] The boss structure 3 is placed in the mounting groove 2, and the boss structure 3 is attached to the groove bottom of the mounting groove 2, and a first gap 4 is reserved between the side wall of the boss structure 3 and the groove wall of the mounting groove 2, so that the boss structure 3 can displace radially along the mounting groove 2 while being attached to the groove bottom of the mounting groove 2.

[0024] The plunger rod 5 is connected to the end of the boss structure 3 away from the groove bottom of the mounting groove 2 by welding, screwing or other methods, and the plunger rod 5 extends along the direction from the groove bottom of the mounting groove 2 to the groove opening of the mounting groove 2.

[0025] The pressing part 6 is sleeved on the plunger rod 5, and a second gap 7 is reserved between the pressing part 6 and the plunger rod 5, so that the plunger rod 5 can displace radially along the pressing part 6. At the same time, the edge of the end of the pressing part 6 close to the slider 1 is connected to the slider 1 by welding, screwing or other methods. When the pressing part 6 is connected to the slider 1, the middle part of the end of the pressing part 6 close to the slider 1 is attached to the end of the boss structure 3 away from the groove bottom of the mounting groove 2, so as to reduce the risk of sliding of the boss structure 3 along the groove bottom of the mounting groove 2 to the groove opening of the mounting groove 2, and to achieve the purpose of connecting the plunger rod 5 and the slider 1.

[0026] During use, when the coaxiality between the plunger rod 5 and the cylinder body is low, the second gap 7 between the plunger rod 5 and the compression member 6 allows the plunger rod 5 to displace along the radial direction of the compression member 6 during the axial reciprocating movement of the plunger rod 5, so as to adjust the coaxiality between the plunger rod 5 and the cylinder body, reduce the risk of wear of the plunger rod 5, prolong the service life of the plunger rod 5, and improve the probability of normal use of the plunger pump. When the plunger rod 5 displaces along the radial direction of the compression member 6, the first gap 4 between the boss structure 3 and the slot wall of the mounting slot 2 allows the boss structure 3 to displace synchronously along the radial direction of the mounting slot 2 in the mounting slot 2, so as to effectively ensure the coaxiality between the plunger rod 5 and the slider 1 during the displacement of the plunger rod 5, and reduce the risk of tilting, bending, breaking and wear of the plunger rod 5.

[0027] Embodiment 2

[0028] If the width of the first gap 4 is less than the width of the second gap 7, when the plunger rod 5 displaces along the radial direction of the compression member 6 in the compression member 6 to abut against the inner wall of the compression member 6, there is still a gap between the side wall of the boss structure 3 and the slot wall of the mounting slot 2; if the width of the first gap 4 is greater than the width of the second gap 7, when the plunger rod 5 displaces along the radial direction of the compression member 6 in the compression member 6 to abut against the side wall of the boss structure 3 and the slot wall of the mounting slot 2, there is a gap between the plunger rod 5 and the inner wall of the compression member 6. This greatly increases the risk of stress concentration between the boss structure 3 and the slot wall of the mounting slot 2, or between the plunger rod 5 and the compression member 6. Therefore, based on the above-mentioned embodiment 1, in the present embodiment, as shown in Figure 1 the width of the first gap 4 is equal to the width of the second gap 7.

[0029] For example, in the implementation process, the width of the first gap 4 is the same as the width of the second gap 7.

[0030] During use, when the plunger rod 5 displaces along the radial direction of the compression member 6 in the compression member 6 to abut against the inner wall of the compression member 6. At this time, the boss structure 3 abuts against the slot wall of the mounting slot 2. This reduces the risk of stress concentration between the boss structure 3 and the slot wall of the mounting slot 2, or between the plunger rod 5 and the compression member 6, and improves the uniformity of stress distribution, thereby reducing the risk of wear of the boss structure 3 or the plunger rod 5 caused by stress concentration.

[0031] Embodiment 3

[0032] Based on the above-mentioned embodiment 1, in the present embodiment, as shown in Figure 1As shown, a first annular sheath 8 is arranged between the groove wall of the mounting groove 2 and the side wall of the boss structure 3; the inner wall of the first annular sheath 8 is attached to the boss structure 3 or the outer wall of the first annular sheath 8 is attached to the groove wall of the mounting groove 2.

[0033] For example, in the implementation process, the plunger adjusting assembly further comprises a first annular sheath 8, which can be made of elastic and wear-resistant materials such as rubber and plastic. In order to ensure that the first annular sheath 8 can withstand certain pressure changes and maintain good wear resistance.

[0034] The first annular sheath 8 is installed between the groove wall of the mounting groove 2 and the side wall of the boss structure 3 (i.e. in the first gap 4), that is, the first annular sheath 8 is arranged in the mounting groove 2, and the first annular sheath 8 extends from the groove bottom of the mounting groove 2 to the direction of the groove opening of the mounting groove 2, and at the same time, the boss structure 3 is sleeved in the first annular sheath 8. And the first annular sheath 8 is connected to the groove wall of the mounting groove 2 or the side wall of the boss structure 3 by screwing, gluing or other methods. For example, the outer wall of the first annular sheath 8 is connected to the groove wall of the mounting groove 2, or the inner wall of the first annular sheath 8 is connected to the side wall of the boss structure 3. In order to reduce the risk of the first annular sheath 8 sliding out of the first gap 4.

[0035] Wherein, when the first annular sheath 8 is connected to the mounting groove 2, a gap is reserved between the inner wall of the first annular sheath 8 and the boss structure 3; when the first annular sheath 8 is connected to the side wall of the boss structure 3, a gap is reserved between the outer wall of the first annular sheath 8 and the groove wall of the mounting groove 2. In order to ensure that the first annular sheath 8 does not interfere with the radial displacement of the boss structure 3 in the mounting groove 2, thereby facilitating the boss structure 3 to adapt to the low coaxiality between the plunger rod 5 and the cylinder.

[0036] In use, when the plunger rod 5 is displaced in the compression member 6 along the radial direction of the compression member 6 away from the axial direction of the compression member 6, the first annular sheath 8 will be gradually clamped between the side wall of the boss structure 3 and the groove wall of the mounting groove 2. In order to reduce the risk of direct contact between the boss structure 3 and the groove wall of the mounting groove 2, thereby reducing the friction between the boss structure 3 and the groove wall of the mounting groove 2, and reducing the wear between the boss structure 3 and the groove wall of the mounting groove 2.

[0037] Embodiment 4

[0038] Based on the above-mentioned embodiment 1, in this embodiment, as shown in the figure, Figure 1 The compression member 6 and the plunger rod 5 are provided with a second annular sheath 9; the inner wall and the outer wall of the second annular sheath 9 are respectively attached to the compression member 6 and the plunger rod 5, and the second annular sheath 9 is used to stretch and contract along the compression member 6 to the plunger rod 5.

[0039] For example, in implementation, the plunger adjusting assembly also includes a second annular sleeve 9, which can be made of elastic and wear-resistant materials such as rubber or plastic. This ensures that the second annular sleeve 9 can withstand certain pressure changes and maintain good wear resistance.

[0040] The second annular sleeve 9 is disposed within the second gap 7 between the clamping member 6 and the plunger rod 5, with its inner wall tightly fitted to the plunger rod 5 and its outer wall tightly fitted to the inner wall of the clamping member 6. The second annular sleeve 9 is connected to the plunger rod 5 and / or the clamping member 6 by means of screwing, gluing, or other methods. This aims to reduce the risk of the second annular sleeve 9 slipping out of the second gap 7. Furthermore, the second annular sleeve 9 can extend and retract along the clamping member 6 towards the plunger rod 5 to ensure that it can accommodate changes in the plunger rod 5 during radial displacement along the clamping member 6.

[0041] During use, when the plunger rod 5 moves radially within the clamping member 6, the second annular sleeve 9 extends and retracts accordingly. This serves two purposes: firstly, to reduce the risk of direct contact between the plunger rod 5 and the clamping member 6, thereby reducing friction and wear; and secondly, to enhance the seal between the clamping member 6 and the plunger rod 5, thus reducing the inflow of external impurities from the second gap 7 into the mounting groove 2, which could affect the displacement of the boss structure 3 and the plunger rod 5.

[0042] Example 5

[0043] Based on the above embodiment 1, in this embodiment, as follows: Figure 1 As shown, a ball bearing 10 is provided between the bottom of the mounting groove 2 and the boss structure 3; the two sides of the ball bearing 10 are respectively attached to the bottom of the mounting groove 2 and the boss structure 3.

[0044] For example, in implementation, the plunger adjustment assembly also includes ball bearings 10. The ball bearings 10 can be made of stainless steel, ceramic, or hardened steel balls, using materials that are wear-resistant, have high hardness, and a low coefficient of friction. This is intended to ensure that the ball bearings 10 maintain good performance under high pressure and frequent movement. The ball bearings 10 are placed between the bottom of the mounting groove 2 and the boss structure 3, and the ball bearings 10 are tightly fitted to the bottom of the mounting groove 2 and the boss structure 3. A number of ball bearings 10 are provided, which can be evenly distributed at the bottom of the mounting groove 2 to form a ball bearing support surface, providing comprehensive support and reducing pressure on the contact area.

[0045] During use, when the boss structure 3 is displaced radially relative to the mounting groove 2, the balls 10 can roll on the bottom of the mounting groove 2. It is expected to achieve the purpose of converting the sliding friction between the boss structure 3 and the bottom of the mounting groove 2 into rolling friction, thereby greatly reducing the friction between the boss structure 3 and the bottom of the mounting groove 2, making the movement of the boss structure 3 in the mounting groove 2 more smooth, reducing energy loss, and reducing wear between the boss structure 3 and the bottom of the mounting groove 2.

[0046] Embodiment 6

[0047] Based on the above-mentioned embodiment 5, in this embodiment, as shown in Figure 1 In combination Figure 2 with the drawings, the boss structure 3 is provided with a containing groove 11 at one end close to the bottom of the mounting groove 2; the containing groove 11 extends along the radial direction of the boss structure 3; a plurality of containing grooves 11 are uniformly arranged around the axis of the boss structure 3, and each containing groove 11 is provided with the ball 10; the side of the ball 10 away from the bottom of the containing groove 11 is attached to the bottom of the mounting groove 2.

[0048] For example, in the implementation process, the containing groove 11 is provided at one end of the boss structure 3 close to the bottom of the mounting groove 2, and the containing groove 11 extends along the radial direction of the boss structure 3. The number of the containing grooves 11 is several, and the plurality of containing grooves 11 are uniformly arranged around the axis of the boss structure 3. The number of the balls 10 is several, and the plurality of balls 10 are distributed in each containing groove 11 to form a circular array, so as to achieve the purpose of providing comprehensive support and reducing the pressure on the contact area. The ball 10 is attached to the bottom of the containing groove 11, the side of the ball 10 away from the bottom of the containing groove 11 is attached to the bottom of the mounting groove 2, and the ball 10 can freely roll in the containing groove 11.

[0049] During use, when the boss structure 3 is displaced radially relative to the mounting groove 2, the balls 10 will roll in the containing groove 11. It is expected to achieve the purpose of positioning the balls 10, thereby reducing the risk of position uncertainty and potential jam caused by the balls 10 rolling randomly on the bottom of the mounting groove 2.

[0050] Embodiment 7

[0051] Based on the above-mentioned embodiment 6, in this embodiment, as shown in Figure 1 In combination Figure 2 with the drawings, the diameter of the ball 10 is greater than the width of the opening of the containing groove 11, and the center of the ball 10 is located in the containing groove 11.

[0052] Exemplarily, in the implementation process, the diameter of the ball 10 is greater than the width of the slot of the accommodating groove 11, and the center of the ball 10 is located in the accommodating groove 11. That is, the ball 10 can freely roll in the accommodating groove 11, but cannot slide out of the slot of the accommodating groove 11.

[0053] In the assembly process, the ball 10 is first placed into the accommodating groove 11 from both ends of the accommodating groove 11, and then the boss structure 3 is gently placed into the mounting groove 2. Among them, the diameter of the ball 10 is greater than the width of the slot of the accommodating groove 11, so as to reduce the risk of the ball 10 sliding out of the slot of the accommodating groove 11 in the process of placing the boss structure 3 into the mounting groove 2, thereby improving the convenience of disassembly and assembly.

[0054] Embodiment 8

[0055] The embodiment provides a plunger pump, which comprises the plunger adjusting assembly according to any one of the embodiments 1-7. It is expected to improve the overall performance of the plunger pump.

[0056] Although the present application has been described with reference to a number of explanatory embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles disclosed herein. More particularly, various modifications and improvements can be made to the compositions of matter and / or methods described herein within the scope and range of equivalents of the disclosed subject matter. In addition to modifications, improvements and variations of the subject matter combinations layout, other uses will become apparent to those of ordinary skill in the art from the disclosure, drawings and claims.

Claims

1. A plunger adjustment assembly, characterized in that, include: A slider (1) has a mounting groove (2) at one end; A boss structure (3) is attached to the bottom of the mounting groove (2). A first gap (4) is provided between the boss structure (3) and the groove wall of the mounting groove (2). The first gap (4) is used to reserve space for the boss structure (3) to move radially along the mounting groove (2). A plunger rod (5) is connected to one end of the boss structure (3) away from the bottom of the mounting groove (2); A clamping member (6) is sleeved on the plunger rod (5). A second gap (7) is provided between the clamping member (6) and the plunger rod (5). The second gap (7) is used to reserve space for the plunger rod (5) to move radially along the clamping member (6). The clamping member (6) is connected to the slider (1), and the clamping member (6) is attached to the end of the boss structure (3) away from the bottom of the mounting groove (2).

2. The plunger adjusting assembly according to claim 1, characterized in that: The width of the first gap (4) is equal to the width of the second gap (7).

3. The plunger adjusting assembly according to claim 1, characterized in that: A first annular sleeve (8) is provided between the groove wall of the mounting groove (2) and the side wall of the boss structure (3); The inner wall of the first annular sleeve (8) is attached to the boss structure (3) or the outer wall of the first annular sleeve (8) is attached to the groove wall of the mounting groove (2).

4. The plunger adjusting assembly according to claim 1, characterized in that: A second annular sleeve (9) is provided between the clamping member (6) and the plunger rod (5); The inner and outer walls of the second annular sleeve (9) are respectively attached to the clamping member (6) and the plunger rod (5), and the second annular sleeve (9) is used to extend and retract along the clamping member (6) toward the plunger rod (5).

5. The plunger adjusting assembly according to claim 1, characterized in that: A ball bearing (10) is provided between the bottom of the mounting groove (2) and the boss structure (3); The two sides of the ball (10) are respectively attached to the bottom of the mounting groove (2) and the boss structure (3).

6. The plunger adjusting assembly according to claim 5, characterized in that: The boss structure (3) has a receiving groove (11) at one end near the bottom of the mounting groove (2); The receiving groove (11) extends radially along the boss structure (3); A plurality of the accommodating grooves (11) are evenly arranged around the axis of the boss structure (3), and each of the accommodating grooves (11) is provided with the ball (10); The side of the ball (10) away from the bottom of the receiving groove (11) is attached to the bottom of the mounting groove (2).

7. The plunger adjusting assembly according to claim 6, characterized in that: The diameter of the ball (10) is greater than the width of the groove (11), and the center of the ball (10) is located inside the groove (11).

8. A plunger pump, characterized in that, The plunger pump includes a plunger adjustment assembly as described in any one of claims 1-7.

Images