Plug-in type detachable pump head structure

Abstract

The utility model discloses a plug-in type detachable pump head structure. Belongs to the technical field of plunger pumps and comprises a pump head, a pump body is assembled on one side of the pump head and comprises a first pump body and a second pump body which are detachably connected, one end of the second pump body is located in the first pump body, a connecting piece is arranged at the joint of the first pump body and the second pump body, and the first pump body is provided with a containing cavity. The second pump body is provided with an inserting part, the inserting part is arranged in the containing cavity in a matched mode, one end of the connecting piece is connected with the inserting part, and the other end of the connecting piece is located outside the first pump body. Segmented assembly of the pump body is achieved through insertion, the whole pump body is convenient to disassemble, and the pump body has the advantages of reducing part interference and improving medium conveying stability.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically to a quick-release clamp-type detachable pump head. Background Technology

[0002] A plunger pump is an important component of a hydraulic system. It relies on the reciprocating motion of a plunger within a cylinder to change the fluid in the sealed working chamber, thus achieving oil suction and pressure. Plunger pumps offer advantages such as high rated pressure, compact structure, high efficiency, and convenient flow adjustment. Currently, the industry typically uses integrated pump units, where the pump body and pump head are fixedly connected. Disassembling and installing plunger pumps is difficult, time-consuming, and labor-intensive, resulting in high labor costs. For industries with high disinfection and cleaning requirements, complete disassembly and replacement of the plunger pump can further increase production costs, such as in the food or medical industries. Once a plunger pump is completely disassembled, all parts in contact with it must be thoroughly disinfected. Therefore, detachable plunger pumps can address these issues.

[0003] For example, patent CN113944625B discloses a novel hydraulic end structure for a high-pressure plunger pump. This structure includes a bracket, a pump head, a plunger, and a low-pressure water seal. The bracket houses three sets of stuffing boxes and three sets of valve assemblies. The plunger passes through the low-pressure water seal and is slidably connected to the stuffing boxes. Through the reciprocating motion of the plunger, the inlet check valve and the outlet check valve can be opened or closed. The outlet check valve includes an outlet limiting sleeve, an outlet valve core, and an outlet spring. The inlet check valve includes an inlet limiting sleeve, a first inlet spring, an inlet valve plate, and a second inlet spring. This invention has timely opening and closing characteristics, which can reduce vibration, lower noise, and extend service life. However, in the prior art, the pump body is an integrated structure, making plunger disassembly difficult and affecting production efficiency, assembly efficiency, and disassembly efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-release clamp-type detachable pump head that is compact in structure, easy to disassemble, and can eliminate backlash.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0006] A plug-in detachable pump head structure includes: a pump head, with a pump body mounted on one side of the pump head. The pump body comprises a first pump body and a second pump body detachably connected, with one end of the second pump body located inside the first pump body. A connector is provided at the connection point between the first and second pump bodies. The first and second pump bodies are assembled via the connector, achieving a detachable connection of the entire pump body. This facilitates segmented manufacturing of the pump body, reduces manufacturing difficulty, and improves production efficiency. Furthermore, it addresses the cost issues associated with replacing the pump head, pump body, and the connecting components.

[0007] The connector is used to ensure a continuous and tight connection between the first pump body and the second pump body, solving the problem that the need to set threaded connection holes or other connection methods on the first pump body and the second pump body would increase the difficulty of pump body processing.

[0008] Preferably, the first pump body has a receiving cavity, and the second pump body has a plug-in portion. The plug-in portion is fitted within the receiving cavity, and one end of a connector is connected to the plug-in portion, while the other end of the connector is located outside the first pump body. The assembly of the first and second pump bodies is achieved through the fitting of the plug-in portion within the receiving cavity. This plug-in method allows the second pump body to surround the outside of one end of the first pump body, which helps to shorten the overall length of the pump body, reduce manufacturing costs, and because the plug-in portion fits within the receiving cavity, the first and second pump bodies can restrict each other's positions after assembly, ensuring the stability of the relative positions of the pump head, the first pump body, and the second pump body, reducing the possibility of misalignment among them. This improves the motion stability of the plunger pump, reduces motion interference of related moving parts, and thus reduces wear.

[0009] The fit of the plug part inside the receiving cavity reduces the exposed space at the connection between the first pump body and the second pump body. In other words, by having the first pump body cover one end of the second pump body, the problem of leakage of the internal lubrication medium caused by gaps at the connection is reduced.

[0010] Preferably, the receiving cavity has an open end on one side that communicates with the outside. The insertion part is inserted into the receiving cavity through the open end. The insertion part has a guide surface extending along the insertion direction, and the receiving cavity has an inner wall surface that contacts the guide surface. The guide surface and the inner wall surface of the receiving cavity can make close contact, realizing the insertion guidance between the insertion part and the receiving cavity. During assembly, this improves the assembly efficiency of the first pump body and the second pump body. During disassembly, it ensures that the insertion part can move away from the receiving cavity relative to the extension direction of the guide surface, reducing wear caused by angular offset during the separation of the first pump body and the second pump body, improving the structural strength of the pump body, and reducing maintenance costs.

[0011] Preferably, the guide surfaces are end faces, and there are at least two guide surfaces that are at angles to each other. The fact that the guide surfaces are end faces and at angles to each other allows the insertion portion of the second pump body to be rotated and positioned perpendicular to the insertion direction via the at least two guide surfaces. This provides orientation and positioning for the first and second pump bodies before assembly, further improving assembly efficiency. Furthermore, reducing the number of guide surfaces reduces the possibility of relative rotation between the first and second pump bodies, decreasing the likelihood of wear due to relative torsion after assembly, thereby reducing the risk of media leakage and maintenance costs.

[0012] Preferably, the outer wall of the first pump body has a first hole communicating with the receiving cavity, the outer wall of the plug-in part has a second hole, and the connector has a base, which passes through the first hole and is fitted into the second hole at one end. The first pump body and the second pump body can be separated by removing the connector, realizing the rapid assembly and disassembly of the pump body as a whole. After the plug-in part is inserted into the receiving cavity through its open end, the first hole and the second hole can be positioned accordingly. By having the base pass through the first hole and its end fall into the second hole, the positioning of the first pump body and the second pump body in the plugging direction and the clamping of the second pump body in the first pump body can be realized, reducing the gap between the first pump body and the second pump body caused by motion interference, solving the problem of media leakage, and at the same time preventing the first pump body and the second pump body from loosening at the connection, which would cause wear on the guide surface and affect the plugging assembly.

[0013] Preferably, the receiving cavity has a cavity that does not contact the insertion part. An elastic structure is provided inside the cavity. One end of the elastic structure is installed on the wall of the first pump body inside the cavity, and the other end of the elastic structure contacts the end of the second pump body located inside the receiving cavity. During assembly, the insertion part of the second pump body enters the receiving cavity, and the second hole moves closer to the position of the first hole. During this process, the end of the second pump body with the insertion part can contact and squeeze the elastic structure. The elastic structure deforms under pressure until the second hole and the first hole coincide. At this time, the first pump body and the second pump body are fixed by installing a connector. After fixing, the elastic structure in the cavity is in a compressed state under the squeezing action of the first pump body and the second pump body. That is, the second pump body is continuously subjected to the tension of the elastic element. When disassembling the first pump body and the second pump body, the connector is removed. After the first pump body and the second pump body lose their limiting effect, the elastic structure returns to its original state and releases the tension force, so that the second pump body can quickly separate from the first pump body under the action of the elastic force. This achieves automatic and rapid separation of the first pump body and the second pump body after the connector is removed, improving the pump body disassembly efficiency.

[0014] This elastic structure enables the second pump body and the first pump body to be elastically connected within the receiving cavity, which helps to eliminate the vibration interference transmitted between the second pump body and the first pump body during the operation of the plunger pump, thereby eliminating the return backlash of the moving parts.

[0015] Preferably, the first pump body and the second pump body are provided with coaxial mounting holes of equal diameter, a plunger rod is provided in the mounting hole, the pump head is provided with a mating hole coaxial with the mounting hole, the plunger rod can move axially in the mating hole, and the pump head has a transport cavity communicating with the mating hole.

[0016] Preferably, a sealing groove is provided at the end of the mating hole near the pump head, and a sealing element is provided in the sealing groove, which surrounds and contacts the plunger rod. The pump head has joints with other components, and the plunger rod reciprocates inside the pump head, easily carrying out liquid. The sealing assembly ensures the sealing of the joints between the pump head and other components, and the sealing assembly cooperates with the plunger rod to reduce wear at the joints during the reciprocating motion of the plunger rod.

[0017] Preferably, the sealing element includes a first sealing sleeve, a second sealing sleeve, and a sealing ring. The first sealing sleeve abuts against the pump body, and the sealing ring abuts against the pump head. There is a gap between the first sealing sleeve and the sealing ring, and the first sealing sleeve and the sealing ring compress and fix the second sealing sleeve within the gap. The sealing assembly uses the first sealing sleeve to contact the plunger rod, improving the axial sealing performance of the plunger rod and reducing wear during the reciprocating motion of the plunger rod.

[0018] Preferably, the second sealing sleeve has an annular cavity surrounding the plunger rod, and a hollow sealing ring is provided within the annular cavity. The sealing ring is fixed by the second sealing sleeve to prevent it from shifting on the plunger rod surface.

[0019] Compared with the prior art, this utility model has the following advantages: The pump body is divided into a plug-in first pump body and a second pump body, enabling rapid replacement of the pump body and its internal components, solving the problems of difficult disassembly of plunger pumps and the cost of replacing plunger pump parts; the second pump body is plugged into the receiving cavity of the first pump body, achieving mutual positioning after assembly, ensuring the stability of the relative positions of the pump head, the first pump body, and the second pump body, reducing motion interference, and thus reducing wear; the first pump body covers one end of the second pump body, reducing the problem of leakage of the internal lubricating medium due to gaps at the connection; the guide surface improves assembly efficiency, while reducing wear caused by misalignment between the first and second pump bodies during disassembly, improving the structural strength of the pump body, and reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a plug-in detachable pump head structure according to the present invention;

[0021] Figure 2 This is a top view schematic diagram of a plug-in detachable pump head structure according to the present invention;

[0022] Figure 3 This is a side view of a plug-in detachable pump head structure according to the present invention;

[0023] Figure 4 A cross-sectional schematic diagram of a plug-in detachable pump head structure;

[0024] Figure 5 This is a schematic diagram showing the location of the transport cavity;

[0025] Figure 6 for Figure 4 Enlarged view of region A in the middle;

[0026] Figure 7 for Figure 4 Enlarged schematic diagram of region B in the middle.

[0027] Reference numerals: Pump head 1; Mating hole 10; Transport cavity 11; Sealing groove 12; Pump body 2; First pump body 21; First hole 210; Second pump body 22; Second hole 220; Connector 3; Base 30; Elastic structure 4; Plunger rod 5; Seal 6; First sealing sleeve 61; Second sealing sleeve 62; Sealing pressure ring 63; Sealing ring 64. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below with reference to specific embodiments and accompanying drawings:

[0029] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] See appendix Figure 1 - Appendix Figure 4 A plug-in detachable pump head structure includes: a pump head, with a pump body 2 mounted on one side of the pump head. The pump body 2 comprises a detachably connected first pump body 21 and a second pump body 22, with one end of the second pump body 22 located inside the first pump body 21. A connector 3 is provided at the connection point between the first pump body 21 and the second pump body 22. The first pump body 21 and the second pump body 22 are assembled via the connector 3, achieving a detachable connection of the entire pump body 2. This facilitates segmented manufacturing of the pump body 2, reduces manufacturing difficulty, and improves production efficiency. Furthermore, it addresses the cost issue of replacing the pump head 1, the pump body 2, and the components connecting them.

[0031] The connector 3 is used to ensure a continuous and tight connection between the first pump body 21 and the second pump body 22, solving the problem that the need to set threaded connection holes or other connection methods on the first pump body 21 and the second pump body 22 would increase the difficulty of processing the pump body 2.

[0032] The first pump body 21 has a receiving cavity, and the second pump body 22 has a plug-in portion. The plug-in portion is fitted within the receiving cavity. One end of the connector 3 is connected to the plug-in portion, and the other end of the connector 3 is located outside the first pump body 21. The assembly of the first pump body 21 and the second pump body 22 is achieved by the fitting of the plug-in portion within the receiving cavity. This plug-in method can form a surround of the second pump body 22 on the outside of one end of the first pump body 21, which helps to shorten the overall extension length of the pump body 2, reduce manufacturing costs, and because the plug-in portion fits within the receiving cavity, the first pump body 21 and the second pump body 22 can restrict each other's positions after assembly, that is, ensure the stability of the relative positions of the pump head 1, the first pump body 21, and the second pump body 22, reduce the possibility of misalignment among the three, thereby improving the motion stability of the plunger pump, reducing motion interference of related moving parts, and thus reducing wear.

[0033] The fit of the plug part inside the receiving cavity reduces the exposed space at the connection between the first pump body 21 and the second pump body 22. That is, by covering one end of the second pump body 22 with the first pump body 21, the problem of internal medium leakage caused by gaps at the connection is reduced.

[0034] The receiving cavity has an open end on one side that communicates with the outside. The insertion part is inserted into the receiving cavity through the open end. The insertion part has a guide surface extending along the insertion direction, and the receiving cavity has an inner wall surface that contacts the guide surface. The guide surface and the inner wall surface of the receiving cavity can make close contact, realizing the insertion guidance between the insertion part and the receiving cavity. During assembly, this improves the assembly efficiency of the first pump body 21 and the second pump body 22. During disassembly, it ensures that the insertion part can move away from the receiving cavity relative to each other along the extension direction of the guide surface, reducing wear caused by angular offset during the separation of the first pump body 21 and the second pump body 22, improving the structural strength of the pump body 2, and reducing maintenance costs.

[0035] The guide surfaces are end faces, and there are at least two guide surfaces that are at angles to each other. The fact that the guide surfaces are end faces and at angles to each other allows the insertion portion of the second pump body 22 to be rotated and positioned perpendicular to the insertion direction via the at least two guide surfaces. This provides the orientation and positioning of the first pump body 21 and the second pump body 22 before assembly, further improving assembly efficiency. On the other hand, lowering the guide surfaces reduces the possibility of relative rotation between the first pump body 21 and the second pump body 22, reducing the possibility of wear due to relative torsion between the first pump body 21 and the second pump body 22 after assembly, thereby reducing the risk of media leakage and lowering maintenance costs.

[0036] See appendix Figure 6The first pump body 21 has a first hole 210 on its outer side wall, which connects to the receiving cavity. The plug-in part has a second hole 220 on its outer side wall. The connector 3 has a base 30, which passes through the first hole 210 and has one end fitted into the second hole 220. The first pump body 21 and the second pump body 22 can be separated by removing the connector 3, which realizes the quick assembly and disassembly of the pump body 2. After the plug-in part is inserted into the receiving cavity through its open end, the first hole 210 and the second hole 220 can be positioned accordingly. By having the base 30 pass through the first hole 210 and fall into the second hole 220, the positioning of the first pump body 21 and the second pump body 22 in the plugging direction can be realized, as well as the clamping of the second pump body 22 in the first pump body 21. This reduces the gap between the first pump body 21 and the second pump body 22 caused by motion interference, solves the problem of media leakage, and at the same time avoids the first pump body 21 and the second pump body 22 from loosening at the connection, which would cause the guide surface to be worn and affect the plugging assembly.

[0037] The receiving cavity has a cavity that does not contact the insertion part. An elastic structure 4 is provided in the cavity. One end of the elastic structure 4 is installed on the wall of the first pump body 21 in the cavity, and the other end of the elastic structure 4 contacts the end of the second pump body 22 located in the receiving cavity. During assembly, the insertion part of the second pump body 22 enters the receiving cavity, and the second hole 220 moves closer to the position of the first hole 210. During this process, the end of the second pump body 22 with the insertion part can contact and squeeze the elastic structure 4. The elastic structure 4 deforms under pressure until the second hole 220 and the first hole 210 coincide. At this time, the first pump body 21 and the second pump body 22 are fixed by installing the connector 3. After fixing, the elastic structure 4 in the cavity is in a compressed state under the squeezing action of the first pump body 21 and the second pump body 22. That is, the second pump body 22 is continuously subjected to the tension of the elastic element. When disassembling the first pump body 21 and the second pump body 22, the connector 3 is taken out. After the first pump body 21 and the second pump body 22 lose their limiting effect, the elastic structure 4 returns to its original state and releases the tension force, so that the second pump body 22 can quickly leave the first pump body 21 under the action of the elastic force. Thus, the first pump body 21 and the second pump body 22 are automatically and quickly separated after the connector 3 is taken out, which improves the disassembly efficiency of the pump body 2.

[0038] The elastic structure 4 enables the elastic connection between the second pump body 22 and the first pump body 21 within the accommodating cavity, which helps to eliminate the vibration interference transmitted between the second pump body 22 and the first pump body 21 during the operation of the plunger pump, thereby eliminating the return clearance of the moving parts.

[0039] See appendix Figure 5 The first pump body 21 and the second pump body 22 are provided with coaxial mounting holes of equal diameter. A plunger rod 5 is provided in the mounting hole. The pump head 1 is provided with a mating hole 10 coaxial with the mounting hole. The plunger rod 5 can move axially in the mating hole 10. The pump head 1 has a transport cavity 11 that communicates with the mating hole 10.

[0040] See appendix Figure 7 A sealing groove 12 is provided at the end of the mating hole 10 near the pump head 1. A sealing element 6 is provided in the sealing groove 12, which surrounds and contacts the plunger rod 5. The pump head 1 has a joint with other components. The plunger rod 5 reciprocates inside the pump head 1, which can easily carry out liquid. The sealing component is provided to ensure the sealing of the joint between the pump head 1 and other components, and the sealing component cooperates with the plunger rod 5 to reduce wear at the joint between the pump head 1 and other components during the reciprocating motion of the plunger rod 5.

[0041] The sealing component 6 includes a first sealing sleeve 61, a second sealing sleeve 62, and a sealing pressure ring 63. The first sealing sleeve 61 abuts against the pump body 2, and the sealing pressure ring 63 abuts against the pump head 1. There is a gap between the first sealing sleeve 61 and the sealing pressure ring 63, which compresses and fixes the second sealing sleeve 62 within the gap. The sealing assembly uses the first sealing sleeve 61 to contact the plunger rod 5, improving the axial sealing performance of the plunger rod 5 and reducing wear during the reciprocating motion of the plunger rod 5.

[0042] The second sealing sleeve 62 has an annular cavity surrounding the plunger rod 5. A hollow sealing ring 64 is provided within the annular cavity. The sealing ring 64 is fixed in place by the second sealing sleeve to prevent it from shifting on the surface of the plunger rod 5.

[0043] Example 2

[0044] Based on Embodiment 1 of the present invention, the first hole 210 has an internal thread on its inner wall, the second hole 220 is a countersunk hole, the base 30 includes a middle section located in the middle, and the base also includes a plug located at one end. The outer wall of the middle section has an external thread that mates with the internal thread, and the plug can be fitted into the countersunk hole.

[0045] It should be noted that the diameter of the second hole 220 is not greater than the diameter of the first hole 210.

[0046] The base 30 is inserted into the first hole, and the external thread of the middle section is screwed into the internal thread of the first hole 210 to achieve the fastening of the base 3 on the first pump body. During the rotation of the middle section, the plug gradually falls into the countersunk hole, thereby achieving the axial positioning of the first pump body 21 and the second pump body 22.

[0047] When disassembly is required, the base 30 can be removed by rotating it in the opposite direction. At this time, the first pump body 21 and the second pump body 22 lose their limiting position, making it easy to remove.

[0048] The above method allows for the installation and disassembly of the first pump body 21 and the second pump body 22 by rotating the connector 3, which provides convenience for the disassembly and assembly of the plunger pump.

[0049] The base is tightened by the thread in the middle section, and the plug is inserted into the countersunk hole to form the positioning of the first pump body 21 and the second pump body 22. That is, the plug is positioned in the countersunk hole by its shape, which can interfere with the wear of the threaded connection by vibration, improve the connection stability of the first pump body 21 and the second pump body 22, reduce maintenance costs, and improve the working stability and safety of the plunger pump.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A plug-in detachable pump head structure, comprising: A pump head (1) is characterized in that a pump body (2) is mounted on one side of the pump head (1), wherein the pump body (2) includes a first pump body (21) and a second pump body (22) that are detachably connected, one end of the second pump body (22) is located inside the first pump body (21), and a connector (3) is provided at the connection between the first pump body (21) and the second pump body (22). The first pump body (21) has a receiving cavity, and the outer wall of the first pump body (21) has a first hole (210) communicating with the receiving cavity. The second pump body (22) has a plug-in part, and the outer wall of the plug-in part has a second hole (220). The connector (3) has a base (30), and the base (30) passes through the first hole (210) and one end is fitted in the second hole (220).

2. The plug-in detachable pump head structure according to claim 1, characterized in that: The plug part is fitted inside the receiving cavity, one end of the connector (3) is connected to the plug part, and the other end of the connector (3) is located outside the first pump body (21).

3. The plug-in detachable pump head structure according to claim 1, characterized in that: The receiving cavity has an open end on one side that communicates with the outside. The plug-in part is inserted into the receiving cavity through the open end. The plug-in part has a guide surface extending in the insertion direction. The receiving cavity has an inner wall surface that contacts the guide surface.

4. The plug-in detachable pump head structure according to claim 3, characterized in that: The guide surface is an end face, and there are at least two guide surfaces that are at an angle to each other.

5. The plug-in detachable pump head structure according to claim 1, characterized in that: The receiving cavity has a cavity that does not contact the insertion part. An elastic structure (4) is provided in the cavity. One end of the elastic structure (4) is installed on the wall of the first pump body (21) in the cavity, and the other end of the elastic structure (4) contacts the end of the second pump body (22) located in the receiving cavity.

6. The plug-in detachable pump head structure according to claim 1, characterized in that: The first pump body (21) and the second pump body (22) are provided with coaxial mounting holes of equal diameter. A plunger rod (5) is provided in the mounting hole. The pump head (1) is provided with a mating hole (10) coaxial with the mounting hole. The plunger rod (5) can move axially in the mating hole (10). The pump head (1) has a transport cavity (11) communicating with the mating hole (10).

7. The plug-in detachable pump head structure according to claim 6, characterized in that: The mating hole (10) is provided with a sealing groove (12) at the end near the pump head (1), and a sealing element (6) is provided in the sealing groove (12), which surrounds and contacts the plunger rod (5).

8. The plug-in detachable pump head structure according to claim 7, characterized in that: The sealing element (6) includes a first sealing sleeve (61), a second sealing sleeve (62), and a sealing ring (63). The first sealing sleeve (61) abuts against the pump body (2), and the sealing ring (63) abuts against the pump head (1). There is a gap between the first sealing sleeve (61) and the sealing ring (63). The first sealing sleeve (61) and the sealing ring (63) squeeze and fix the second sealing sleeve (62) in the gap.

9. The plug-in detachable pump head structure according to claim 8, characterized in that: The second sealing sleeve (62) has an annular cavity surrounding the plunger rod (5), and the annular cavity is provided with a sealing ring (64), which is hollow.

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