Plunger connecting structure with anti-deviation function

Abstract

The utility model discloses a plunger connecting structure with an anti-deviation function, and relates to the technical field of plungers. According to the main technical scheme, a first connecting groove is formed in one end of a crosshead, and the bottom of the first connecting groove is of an arc-shaped structure bent from one end of the crosshead to the other end of the crosshead; one end of the ball head is attached to the bottom of the first connecting groove; the plunger rod is connected to the end, away from the crosshead, of the ball head. The plunger rod is sleeved with the pressing ring, a gap is formed between the pressing ring and the plunger rod, and the gap is used for reserving a space for deviation of the plunger rod; the pressing ring is connected with the crosshead, a second connecting groove is formed in the side, close to the crosshead, of the pressing ring, the groove bottom of the second connecting groove is of an arc-shaped structure bent towards the plunger rod along the crosshead, and the groove bottom of the second connecting groove is attached to the end, away from the crosshead, of the ball head. The purposes that the perpendicularity error between the plunger rod and the crosshead is effectively compensated, the risk that a sealing piece deviates and is abraded due to the perpendicularity error is reduced, and the service life of the sealing piece is prolonged are expected to be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plunger technical field, concretely relates to a plunger connecting structure with anti -migration function. BACKGROUND

[0002] The plunger pump has the advantages of compact structure and reliable performance, and is widely used in the fields of petroleum chemical industry, food and pharmaceuticals.

[0003] At present, the plunger of plunger pump is rigidly connected with the cross head. In actual operation, there is perpendicularity error between the axis of plunger and the contact surface of cross head, which easily causes eccentric wear of sealing element and further affects the service life of sealing element. UTILITY MODEL CONTENTS

[0004] The utility model discloses a plunger connecting structure with anti -migration function, solves the plunger of existing plunger pump and the perpendicularity error between cross head, easily causes the eccentric wear of sealing element, and further affects the service life of sealing element.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A plunger connecting structure with anti -migration function, including cross head, ball head, plunger rod and compression ring, the one end of cross head is provided with first connecting groove, the groove bottom of first connecting groove is along the curved arc structure of the one end of cross head to the other end of cross head, the one end of ball head is attached to the groove bottom of first connecting groove, the plunger rod is connected to the one end of ball head away from cross head, the compression ring is set in plunger rod, and the gap is set between compression ring and plunger rod, and the gap is used for reserving the space of plunger rod migration, the compression ring is connected with cross head, and the second connecting groove is set on the side of compression ring close to cross head, the groove bottom of second connecting groove is along the curved arc structure of cross head to plunger rod, and the groove bottom of second connecting groove is attached to the one end of ball head away from cross head.

[0007] Further technical scheme is: the ball head is detachably connected with the plunger rod.

[0008] Further technical scheme is: the end face of the one end of cross head is provided with first connecting hole, the second connecting hole is set in the end face of the one end of compression ring close to cross head, the second connecting hole extends to the one end of compression ring away from cross head along the one end of compression ring close to cross head, and the second connecting hole corresponds with first connecting hole, and the plunger connecting structure further includes connecting piece, and the connecting piece is connected in first connecting hole and second connecting hole.

[0009] Further, the first connecting holes are evenly arranged around the axis of the plunger rod.

[0010] Further, the plunger connecting structure further comprises a protective gasket, which is arranged between the cross head and the compression ring.

[0011] Further, the plunger connecting structure further comprises an elastic ring, which is adapted to the gap and is used to stretch and contract along the plunger rod towards the compression ring.

[0012] Further, the plunger rod is provided with a mounting groove in the form of an annular structure around the circumferential surface of the plunger rod, the elastic ring is connected in the mounting groove, and the side of the elastic ring away from the mounting groove is attached to the compression ring.

[0013] Further, the ball head and the first connecting groove are filled with a lubricating layer, and the ball head and the second connecting groove are also filled with a lubricating layer.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The arc-shaped groove bottom of the ball head and the first connecting groove and the arc-shaped groove bottom of the second connecting groove are attached, so that the ball head can swing freely within a certain range, and the gap is reserved between the compression ring and the plunger rod, so that the position of the plunger rod can be adjusted within a certain range. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the plunger connecting structure with the anti-deviation function in the embodiment.

[0017] Markings in the drawings and corresponding component names:

[0018] 1-cross head; 2-first connecting groove; 3-ball head; 4-plunger rod; 5-compression ring; 6-gap; 7-second connecting groove; 8-first connecting hole; 9-second connecting hole; 10-connector; 11-protective gasket; 12-elastic ring; 13-mounting groove; 14-lubricating layer. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings.

[0020] Embodiment 1

[0021] The embodiment provides a plunger connecting structure with a deviation prevention function. Figure 1 As shown in the figure, the plunger connecting structure with a deviation prevention function comprises a cross head 1, a ball head 3, a plunger rod 4 and a compression ring 5. One end of the cross head 1 is provided with a first connecting groove 2, the groove bottom of the first connecting groove 2 is in an arc structure which is curved from one end of the cross head 1 to the other end of the cross head 1. One end of the ball head 3 is attached to the groove bottom of the first connecting groove 2. The plunger rod 4 is connected to the end of the ball head 3 which is away from the cross head 1. The compression ring 5 is sleeved on the plunger rod 4, and a gap 6 is arranged between the compression ring 5 and the plunger rod 4, which is used for reserving space for the deviation of the plunger rod 4. The compression ring 5 is connected to the cross head 1, and a second connecting groove 7 is arranged on the side of the compression ring 5 which is close to the cross head 1. The groove bottom of the second connecting groove 7 is in an arc structure which is curved from the cross head 1 to the plunger rod 4, and the groove bottom of the second connecting groove 7 is attached to the end of the ball head 3 which is away from the cross head 1.

[0022] For example, in the implementation process, the first connecting groove 2 is opened at one end of the cross head 1, and the groove bottom of the first connecting groove 2 is arranged in an arc structure which is curved from one end of the cross head 1 to the other end of the cross head 1.

[0023] One end of the ball head 3 is fitted in the first connecting groove 2. That is, the curvature radius of the ball head 3 is the same as that of the groove bottom of the first connecting groove 2. Therefore, the ball head 3 can be attached to the groove bottom of the first connecting groove 2 and can rotate freely relative to the cross head 1.

[0024] The plunger rod 4 is connected to the end of the ball head 3 which is away from the cross head 1 by screwing, welding, clamping or other methods.

[0025] The compression ring 5 is sleeved on the plunger rod 4, and the compression ring 5 is connected to the cross head 1 by screwing, welding, clamping or other methods. The second connecting groove 7 is opened on the end face of the compression ring 5 which is close to the cross head 1, the groove bottom of the second connecting groove 7 is arranged in an arc structure which is curved from the cross head 1 to the plunger rod 4, and the groove bottom of the second connecting groove 7 is fitted to the end of the ball head 3 which is away from the cross head 1. That is, the curvature radius of the groove bottom of the second connecting groove 7 is the same as that of the ball head 3. Therefore, the ball head 3 can be attached to the groove bottom of the second connecting groove 7 and can rotate freely relative to the compression ring 5. A certain gap 6 is reserved between the compression ring 5 and the plunger rod 4, which is used for reserving space for the deviation of the plunger rod 4, so as to reduce the risk of stress concentration caused by excessive constraint.

[0026] In use, the spherical head 3 is in contact with the arc-shaped groove bottom of the first connecting groove 2 and the arc-shaped groove bottom of the second connecting groove 7, so that the spherical head 3 can swing freely within a certain range, while the gap 6 between the compression ring 5 and the plunger rod 4 is reserved, so that the plunger rod 4 can be freely adjusted within a certain range. It is expected to effectively compensate for the perpendicularity error between the plunger rod 4 and the cross head 1, thereby reducing the risk of seal displacement and wear caused by perpendicularity error, and prolonging the service life of the seal. At the same time, the compression ring 5 adopts an integrated structure to improve the strength of the compression ring 5.

[0027] Embodiment 2

[0028] In use, the end of the plunger rod 4 away from the cross head 1 is usually larger in diameter, or integrally formed with other connecting structures, so that the compression ring 5 cannot be easily fitted from the end of the plunger rod 4 away from the cross head 1. Therefore, in order to achieve the purpose of facilitating the user to fit the compression ring 5 on the plunger rod 4, as shown in the following embodiment. Figure 1 As shown in the above embodiment 1, in this embodiment, the spherical head 3 and the plunger rod 4 are detachably connected.

[0029] For example, a threaded hole is formed at the end of the spherical head 3 away from the cross head 1, an external thread is provided at the end of the plunger rod 4 close to the cross head 1, and the plunger rod 4 is screwed into the threaded hole on the spherical head 3 through the external thread, thereby achieving detachable connection between the spherical head 3 and the plunger rod 4.

[0030] When installing, first, the end of the plunger rod 4 for connecting with the spherical head 3 is inserted into the compression ring 5 from the end of the compression ring 5 not provided with the second connecting groove 7, so that the compression ring 5 is fitted on the plunger rod 4. Secondly, the spherical head 3 is connected to the plunger rod 4. Thirdly, the end of the spherical head 3 away from the plunger rod 4 is fitted into the first connecting groove 2 on the cross head 1. Finally, the compression ring 5 is connected to the cross head 1, and the second connecting groove 7 on the compression ring 5 is adapted to the spherical head 3. It is expected to achieve the purpose of reducing the risk that the compression ring 5 cannot be directly fitted due to the larger size of the end of the plunger rod 4 away from the spherical head 3 or the presence of additional connecting structures, by detachable connection between the spherical head 3 and the plunger rod 4.

[0031] Embodiment 3

[0032] During prolonged use of the plunger connection structure, significant wear may occur between the ball head 3 and the bottom of the first connecting groove 2, or between the ball head 3 and the bottom of the second connecting groove 7. This can lead to significant wobble in the ball head 3, affecting the stability of the connection between the plunger rod 4 and the crosshead 1. Therefore, to facilitate user separation of the crosshead 1 from the clamping ring 5 for checking the fit between the ball head 3 and the bottom of the first connecting groove 2, and between the ball head 3 and the bottom of the second connecting groove 7, as follows... Figure 1 As shown, based on the above embodiment 1, in this embodiment, a first connecting hole 8 is provided on the end face of one end of the crosshead 1; a second connecting hole 9 is provided on the end face of the clamping ring 5 near the crosshead 1, the second connecting hole 9 extends along the end of the clamping ring 5 near the crosshead 1 to the end of the clamping ring 5 away from the crosshead 1, and the second connecting hole 9 corresponds to the first connecting hole 8; the plunger connection structure also includes a connector 10; the connector 10 is connected in the first connecting hole 8 and the second connecting hole 9.

[0033] For example, during implementation, a first connecting hole 8 is provided on the end face of one end of the crosshead 1.

[0034] A second connecting hole 9 is provided on the end face of the clamping ring 5 near the crosshead 1. The second connecting hole 9 extends from the end of the clamping ring 5 near the crosshead 1 to the end away from the crosshead 1, and the second connecting hole 9 corresponds to the first connecting hole 8 on the crosshead 1.

[0035] The connector 10 can be a bolt, pin, or similar structure. One end of the connector 10 is inserted into the first connecting hole 8 from the end of the second connecting hole 9 away from the crosshead 1, thus connecting the connector 10 to both the first and second connecting holes 8 and 9. This achieves the purpose of detachably connecting the crosshead 1 and the clamping ring 5 together. On the one hand, this aims to ensure the stability of the connection between the crosshead 1 and the clamping ring 5. On the other hand, it aims to facilitate the user's inspection and maintenance of the ball head 3, the bottom of the first connecting groove 2, and the bottom of the second connecting groove 7 when it is necessary to check the fit between them. This allows the user to easily remove the connector 10 to separate the crosshead 1 from the clamping ring 5.

[0036] Example 4

[0037] To further improve the stability of the connection between the crosshead 1 and the clamping ring 5, such as... Figure 1 As shown, based on the above embodiment 3, in this embodiment, the number of the first connecting holes 8 is set to several; the several first connecting holes 8 are evenly distributed around the axis of the plunger rod 4.

[0038] For example, in implementation, a plurality of first connecting holes 8 are provided, and these plurality of first connecting holes 8 are evenly distributed around the axis of the plunger rod 4. Correspondingly, a plurality of second connecting holes 9 are formed on the end face of the clamping ring 5 near the crosshead 1, and the position and number of the plurality of second connecting holes 9 are matched with the first connecting holes 8. A plurality of connectors 10 pass through a connecting hole group (consisting of a first connecting hole 8 and a second connecting hole 9 corresponding to the first connecting hole 8) to detachably connect the crosshead 1 and the clamping ring 5.

[0039] Multiple connection points are evenly distributed around the axis of the plunger rod 4, which makes the force applied to the crosshead 1 and the clamping ring 5 more uniform, in order to reduce the risk of local stress concentration and thus improve the connection stability between the crosshead 1 and the clamping ring 5.

[0040] Example 5

[0041] like Figure 1 As shown, based on the above embodiment 1, in this embodiment, the plunger connection structure further includes a protective washer 11; the protective washer 11 is disposed between the crosshead 1 and the clamping ring 5.

[0042] For example, in implementation, the plunger connection structure also includes a protective washer 11. The protective washer 11 can be made of rubber, plastic, or other materials with appropriate elasticity and wear resistance. The protective washer 11 is connected between the crosshead 1 and the clamping ring 5, with both sides of the protective washer 11 respectively abutting the ends of the clamping ring 5 and the crosshead 1 that are close to each other. On one hand, the protective washer 11, positioned between the crosshead 1 and the clamping ring 5, effectively reduces the risk of direct contact between the crosshead 1 and the clamping ring 5, aiming to reduce the wear rate between the crosshead 1 and the clamping ring 5, thereby extending the service life of the crosshead 1 and the clamping ring 5. On the other hand, the protective washer 11 can effectively seal the connection seam between the crosshead 1 and the clamping ring 5, aiming to reduce the entry of external impurities from the connection seam between the crosshead 1 and the clamping ring 5 into the interior of the plunger connection structure, and to reduce their impact on the contact surfaces between the ball head 3 and the first connecting groove 2, and between the ball head 3 and the second connecting groove 7. On the other hand, it is hoped that the protective gasket 11 will absorb the vibration and impact generated during operation, thereby improving the stability and reliability of the plunger connection structure.

[0043] Example 6

[0044] like Figure 1 As shown, based on the above embodiment 1, in this embodiment, the plunger connection structure further includes an elastic ring sleeve 12; the elastic ring sleeve 12 is adapted to the gap 6, and the elastic ring sleeve 12 is used to extend and retract along the plunger rod 4 toward the compression ring 5.

[0045] For example, in implementation, the plunger connection structure also includes an elastic ring 12, which can be made of rubber, polyurethane, or other elastic and wear-resistant materials. The elastic ring 12 is installed within the gap 6 between the plunger rod 4 and the clamping ring 5. The inner side of the elastic ring 12 is in contact with the plunger rod 4, and the outer side is in contact with the clamping ring 5. The elastic ring 12 can extend and retract along the plunger rod 4 towards the clamping ring 5. On one hand, the elasticity of the elastic ring 12 effectively ensures that the plunger rod 4 can be adjusted within a certain range. This is intended to effectively compensate for the perpendicularity error between the plunger rod 4 and the crosshead 1, thereby reducing the risk of seal misalignment and wear due to perpendicularity error, and extending the service life of the seal. On the other hand, the elastic ring 12 effectively reduces the risk of direct contact and friction between the plunger rod 4 and the clamping ring 5, while effectively absorbing vibration and impact during use. The aim is to reduce the wear rate of the plunger rod 4 and the clamping ring 5, thereby extending their service life. Furthermore, the elastic sleeve 12 can effectively seal the connection seam between the plunger rod 4 and the clamping ring 5, thereby reducing the entry of external impurities into the plunger connection structure through this seam and their impact on the contact surfaces between the ball head 3 and the first connecting groove 2, and between the ball head 3 and the second connecting groove 7.

[0046] Example 7

[0047] like Figure 1 As shown, based on the above embodiment 6, in this embodiment, the plunger rod 4 is provided with an installation groove 13; the installation groove 13 is an annular structure arranged around the periphery of the plunger rod 4; the elastic ring sleeve 12 is connected in the installation groove 13, and the side of the elastic ring sleeve 12 away from the installation groove 13 is attached to the clamping ring 5.

[0048] For example, in implementation, the plunger rod 4 has a mounting groove 13, which is an annular structure surrounding the circumference of the plunger rod 4. An elastic ring 12 is connected to the mounting groove 13 on the plunger rod 4 by means of screwing, gluing, or nesting, with the side of the elastic ring 12 away from the mounting groove 13 tightly fitted to the clamping ring 5. Securely connecting the elastic ring 12 to the plunger rod 4 aims to reduce the risk of the elastic ring 12 falling off or shifting during the insertion of the plunger rod 4 into the clamping ring 5. Simultaneously, it aims to reduce the risk of displacement of the elastic ring 12 due to vibration or impact during use.

[0049] Example 8

[0050] like Figure 1As shown, based on the above embodiment 1, in this embodiment, the space between the ball head 3 and the first connecting groove 2, and the space between the ball head 3 and the second connecting groove 7 are both filled with a lubricating layer 14.

[0051] For example, in the implementation process, a lubricating layer 14 is filled between the ball head 3 and the first connecting groove 2, and between the ball head 3 and the second connecting groove 7. This lubricating layer 14 can be made of grease, solid lubricant (such as molybdenum disulfide), or other lubricating and high-temperature resistant materials. The aim is to significantly reduce the coefficient of friction between the ball head 3 and the first connecting groove 2, and between the ball head 3 and the second connecting groove 7, thereby reducing the wear rate between them and extending the service life of the ball head 3, the first connecting groove 2, and the second connecting groove 7.

[0052] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A plunger connection structure with anti-displacement function, characterized in that, include: A crosshead (1) is provided with a first connecting groove (2) at one end of the crosshead (1). The bottom of the first connecting groove (2) is an arc-shaped structure that bends from one end of the crosshead (1) to the other end of the crosshead (1). Ball head (3), one end of which is attached to the bottom of the first connecting groove (2); A plunger rod (4) is connected to the end of the ball head (3) away from the crosshead (1); A clamping ring (5) is fitted onto the plunger rod (4). A gap (6) is provided between the clamping ring (5) and the plunger rod (4). The gap (6) is used to reserve space for the displacement of the plunger rod (4). The clamping ring (5) is connected to the crosshead (1). A second connecting groove (7) is provided on the side of the clamping ring (5) near the crosshead (1). The bottom of the second connecting groove (7) is an arc-shaped structure that bends along the crosshead (1) toward the plunger rod (4). The bottom of the second connecting groove (7) is attached to the end of the ball head (3) away from the crosshead (1).

2. The plunger connection structure according to claim 1, characterized in that: The ball head (3) is detachably connected to the plunger rod (4).

3. The plunger connection structure according to claim 1, characterized in that: The end face of one end of the crosshead (1) is provided with a first connecting hole (8); The clamping ring (5) has a second connecting hole (9) on one end face near the crosshead (1). The second connecting hole (9) extends along the end of the clamping ring (5) near the crosshead (1) to the end of the clamping ring (5) away from the crosshead (1), and the second connecting hole (9) corresponds to the first connecting hole (8). The plunger connection structure also includes a connector (10); The connector (10) is connected to the first connecting hole (8) and the second connecting hole (9).

4. The plunger connection structure according to claim 3, characterized in that: The number of the first connecting holes (8) is set to several; The plurality of first connecting holes (8) are evenly distributed around the axis of the plunger rod (4).

5. The plunger connection structure according to claim 1, characterized in that: It also includes protective gaskets (11); The protective washer (11) is disposed between the crosshead (1) and the clamping ring (5).

6. The plunger connection structure according to claim 1, characterized in that: It also includes an elastic ring sleeve (12); The elastic ring (12) is adapted to fit within the gap (6), and the elastic ring (12) is used to extend and retract along the plunger rod (4) toward the compression ring (5).

7. The plunger connection structure according to claim 6, characterized in that: The plunger rod (4) is provided with an installation groove (13); The mounting groove (13) has an annular structure arranged around the circumference of the plunger rod (4); The elastic ring (12) is connected to the mounting groove (13), and the side of the elastic ring (12) away from the mounting groove (13) is attached to the clamping ring (5).

8. The plunger connection structure according to claim 1, characterized in that: A lubricating layer (14) is filled between the ball head (3) and the first connecting groove (2), and between the ball head (3) and the second connecting groove (7).

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