Stud butt joint type detachable pump head structure

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a stud butt joint type detachable pump head structure. A stud butt joint type detachable pump head structure comprises a pump head, a plunger rod and a pump body, the stud butt joint type detachable pump head structure is provided with a fastener, a pump head connecting piece is arranged between the pump head and the pump body, the fastener penetrates through the pump head connecting piece to be connected with the pump head and the pump body, and the end, connected with the pump body, of the fastener is a connecting end. One end, connected with the pump head, of the fastener is a fixed end; one part of the fixed end of the fastener extends out of the surface of the side, away from the pump head connecting piece, of the pump head, and the other part of the fixed end of the fastener is located in the pump head. The pump head and the pump body are assembled by adjusting the thickness of the pump head connecting piece, and the surface of the pump head connecting piece is trimmed, so that tight connection of matching surfaces of the pump head, the pump head connecting piece and the pump body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a stud docking type detachable pump head structure. Background Art

[0002] The plunger pumps currently produced have a fixed connection between the pump body and the pump head, which makes it impossible to easily disassemble the pump head. For industries with high production standards that require disinfection and washing, after the equipment is shut down or production is adjusted, the plunger pump that is in direct contact with the material needs to be thoroughly disinfected before it is put back into use. At this time, the pump body and the pump head are fixed and cannot be disassembled at will. It is difficult to disinfect and wash the internal parts of the pump head and pump body. Different materials are transported by different plunger pumps, which greatly increases production costs. At the same time, a single pump head can only be fixed in one flow range. For customers who require a wide range of flow rates during the production process, different plunger pumps need to be replaced for different flow rates, and the procurement cost of the equipment is high. The prior art CN103410721B plunger pump hydraulic end device comprises a pump head body, a cartridge combination valve, a packing box, and a plunger. The pump head body is provided with a suction port and a discharge port. The cartridge combination valve is disposed within the pump head body, forming a liquid inlet chamber communicating with the suction port and a liquid discharge chamber communicating with the discharge port between the pump head body and the cartridge combination valve. The end face of the packing box is in close contact with the pump head body, and the plunger can reciprocate within the packing box. The cartridge combination valve comprises a compression sleeve, a valve core, a suction valve, and a discharge valve. The prior art utilizes a packing box to clamp and secure the assembly formed by the pump head body and the cartridge combination valve, resulting in low stability and poor sealing. The inventors believe that there is significant room for improvement in the prior art. Summary of the Invention

[0003] The object of the present invention is to provide a stud-jointed detachable pump head structure, which, through the cooperation of fasteners and pump head connectors, makes the pump head and the plunger rod in the pump body easy to disassemble parts, which is conducive to disinfection and washing after the equipment of high production standards is shut down or adjusted. Secondly, for customers with wide flow range requirements for plunger pumps, different pump heads can be purchased to reduce procurement costs; the plunger rod in the pump body frequently reciprocates and its end is continuously impacted by materials, making it a vulnerable part. The detachable plunger rod facilitates the subsequent repair and replacement of the plunger pump, reducing the maintenance and warranty costs of the customer's plunger pump. To this end, the present invention provides a stud-jointed detachable pump head structure, including a pump head, a plunger rod and a pump body, the stud-jointed detachable pump head structure is provided with a fastener, a pump head connector is provided between the pump head and the pump body, the fastener passes through the pump head connector to connect the pump head and the pump body, the end of the fastener connected to the pump body is the connecting end, and the end of the fastener connected to the pump head is the fixed end; a portion of the fixed end of the fastener extends out of the surface of the pump head away from the pump head connector, and the other portion of the fixed end of the fastener is located inside the pump head. The stud-butted detachable pump head structure uses a pump head connector to connect the pump head and the pump body, which is beneficial for assembling the pump head and the pump body by adjusting the thickness of the pump head connector, which is beneficial for reducing the processing requirements of the pump head and the pump body, and by trimming the surface of the pump head connector, ensuring the tight connection of the matching surfaces of the pump head, the pump head connector and the pump body, avoiding the reduction of the sealing of the matching surfaces of the pump head, the pump head connector and the pump body after multiple disassembly; the pump head connector is fixed by the pre-tightening force applied to the pump head and the pump body by fasteners, avoiding the need for the pump head connector to process threaded holes that match the pump head and the pump body, thereby reducing the processing difficulty.

[0004] Preferably, the fastener is a stud, and a nut is provided at the fixed end of the fastener. Both ends of the stud have threads, suitable for connecting one end of the stud to the pump body and the other end of the stud to the pump head. The middle part of the stud is a smooth rod, which facilitates the pump head connector to be sleeved in the middle of the stud, avoiding wear of the connection channel between the pump head connector and the fastener due to working vibration and abnormal load; a nut is provided at the fixed end of the stud, and rotating the nut can simultaneously adjust the pre-tightening force of the stud, the pump head and the pump body, thereby adjusting the pre-tightening force of the pump head connector between the pump head and the pump body, ensuring the sealing and connection reliability of the pump head connector, the pump body and the pump head.

[0005] Preferably, the pump head connector is provided with a first clamping portion on one side near the pump body, the first clamping portion mating with the pump body. Because the pump head connector is secured by clamping the pump head and pump body at both ends, the first clamping portion facilitates connection between the pump head connector and the pump body, ensuring that the connecting holes correspond to each other, facilitating subsequent installation of the pump head and securing with the fastener. The first clamping portion prevents the pump head connector from sliding on the mating surface with the pump body.

[0006] Preferably, the first clamping portion includes an annular portion and a protruding portion, the plunger rod is located inside the annular portion, the fastener is located outside the annular portion, and the protruding portion is connected to the outer wall of the annular portion. The first clamping portion adopts the annular portion to prevent the outflow of liquid from the center of the pump body, improve the sealing performance of the mating surface between the pump head connector and the pump body, and limit the movement of the pump head connector perpendicular to the axis of the plunger rod; the first clamping portion adopts the protruding portion to limit the relative rotation of the pump head connector, and the protruding portion is located on the outer wall of the annular portion, which facilitates the processing of the protruding portion.

[0007] Preferably, a sealing groove is provided on one side of the pump head adjacent to the pump head connector. The sealing groove cooperates with the plunger rod, and a high-pressure sealing structure is provided within the sealing groove. The high-pressure sealing structure surrounds the plunger rod. The pump head and other components have a joint, and the plunger rod reciprocates within the pump head, easily dislodging liquid. The high-pressure sealing structure is provided to ensure the sealing of the joint between the pump head and other components. The high-pressure sealing structure cooperates with the plunger rod to reduce wear at the joint between the pump head and other components during the reciprocating motion of the plunger rod.

[0008] Preferably, the high-pressure sealing structure includes a first sealing sleeve and a sealing pressure ring, wherein one end of the first sealing sleeve abuts against the pump head connector, and the other end of the sealing pressure ring abuts against the pump head. The high-pressure sealing structure utilizes the first sealing sleeve to contact the plunger rod, thereby improving the axial sealing performance of the plunger rod and reducing wear of the plunger rod during reciprocating motion. The sealing pressure ring cooperates with the fastener, and the preload applied during the tightening of the fastener causes the sealing pressure ring to squeeze the first sealing sleeve, thereby enhancing the sealing effect of the high-pressure sealing structure.

[0009] Preferably, the high-pressure sealing structure further comprises a second sealing sleeve, and a groove is provided on the side of the first sealing sleeve close to the sealing pressure ring, and the sealing pressure ring squeezes and fixes the second sealing sleeve in the groove of the first sealing sleeve.

[0010] Preferably, the second sealing sleeve has an annular cavity within which a sealing ring is disposed. The second sealing sleeve contacts the plunger rod and cooperates with the first sealing sleeve to further enhance the sealing performance of the high-pressure sealing structure. The second sealing sleeve secures the sealing ring to prevent it from moving on the surface of the plunger rod.

[0011] The present invention provides a stud-jointed detachable pump head structure, which makes the pump head and the plunger rod in the pump body become easily detachable parts through the cooperation of fasteners and pump head connectors, which is beneficial for disinfection and washing after equipment shutdown or production adjustment in the food and medicine industries; for customers with wide flow range requirements for plunger pumps, different pump heads can be purchased to reduce procurement costs; the plunger rod in the pump body frequently reciprocates and its end is continuously impacted by materials, which is a wearing part. The detachable plunger rod is convenient for subsequent repair and replacement of the plunger pump, which reduces the maintenance and warranty costs of the customer's plunger pump and has the following beneficial effects: it is beneficial for assembling the pump head and pump body by adjusting the thickness of the pump head connector, which is beneficial for reducing the pump The processing requirements of the pump head and pump body, as well as the surface finishing of the pump head connector, ensure the tight connection of the pump head, pump head connector and pump body mating surfaces, and avoid the reduction of sealing performance of the mating surfaces of the pump head, pump head connector and pump body after multiple disassembly; the pump head connector is fixed by the pre-tightening force applied by fasteners on the pump head and pump body, avoiding the need for the pump head connector to be processed with threaded holes that match the pump head and pump body, reducing the difficulty of processing; the plunger rod reciprocates inside the pump head, which is easy to bring out liquid, and a high-pressure sealing structure is set to ensure the sealing of the joints between the pump head and other parts, and the high-pressure sealing structure cooperates with the plunger rod to reduce the wear on the joints between the pump head and other parts during the reciprocating motion of the plunger rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the fastener of the present invention;

[0015] Figure 3 This is a structural diagram of the pump head connector of the utility model;

[0016] Figure 4 This is a schematic cross-sectional view of the plunger rod of the present invention;

[0017] Figure 5 This is a partial enlarged view of the high-pressure sealing structure of the utility model.

[0018] Explanation of the reference numerals: 1 pump head; 2 pump head connector; 3 pump body; 4 fastener; 5 plunger rod; 6 first sealing sleeve; 7 sealing pressure ring; 8 second sealing sleeve; 9 sealing ring; 10 first clamping portion; 1001 protruding portion; 1002 annular portion; 11 nut. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1

[0021] Combine Figure 1 and Figure 2 As shown, a stud-jointed detachable pump head structure includes a pump head 1, a plunger rod 5 and a pump body 3. The stud-jointed detachable pump head structure is provided with a fastener 4. A pump head connector 2 is provided between the pump head 1 and the pump body 3. The fastener 4 passes through the pump head connector 2 to connect the pump head 1 and the pump body 3. The end of the fastener 4 connected to the pump body 3 is the connecting end, and the end of the fastener 4 connected to the pump head 1 is the fixed end; a part of the fixed end of the fastener 4 extends out of the surface of the pump head 1 away from the pump head connector 2, and the other part of the fixed end of the fastener 4 is located inside the pump head 1.

[0022] Through the above-mentioned setting, the stud-butted detachable pump head structure adopts the pump head connector 2 to connect the pump head 1 and the pump body 3, which is conducive to assembling the pump head 1 and the pump body 3 by adjusting the thickness of the pump head connector 2, and is conducive to reducing the processing requirements of the pump head 1 and the pump body 3, and by trimming the surface of the pump head connector 2, ensuring the tight connection of the matching surfaces of the pump head 1, the pump head connector 2 and the pump body 3, and avoiding the reduction of the sealing of the matching surfaces of the pump head 1, the pump head connector 2 and the pump body 3 after multiple disassembly; the pump head connector 2 is fixed by the pre-tightening force applied to the pump head 1 and the pump body 3 by the fastener 4, avoiding the need for the pump head connector 2 to process threaded holes that match the pump head 1 and the pump head 1, thereby reducing the processing difficulty.

[0023] Combine Figure 1 and Figure 2As shown, the fastener 4 is a stud, and the fixed end of the fastener 4 is provided with a nut 11. In this embodiment, the nut 11 adopts a butterfly nut, and both ends of the stud have threads, which are suitable for connecting one end of the stud to the pump body 3 and the other end of the stud to the pump head 1. The middle part of the stud is a smooth rod, which is convenient for the pump head connector 2 to be sleeved in the middle of the stud, avoiding wear of the connection channel of the pump head connector 2 and the fastener 4 due to working vibration and abnormal load; the fixed end of the stud is provided with a nut 11, and rotating the nut 11 can simultaneously adjust the pre-tightening force of the stud and the pump head 1 and the pump body 3, thereby adjusting the pre-tightening force of the pump head connector 2 between the pump head 1 and the pump body 3, ensuring the sealing and connection reliability of the pump head connector 2 and the pump body 3 and the pump head 1; the butterfly nut is convenient for disassembly and installation without instruments, and is convenient for the utility model to be disassembled by hand to complete the disinfection and washing process and reinstall, avoiding the need to use tools and disinfect and wash the tools, reducing the workload of the operator.

[0024] like Figure 2 As shown, the pump head connector 2 is provided with a first clamping portion 10 on the side near the pump body 3, and the first clamping portion 10 cooperates with the pump body 3. Since the pump head connector 2 is fixed by clamping the pump head 1 and the pump body 3 at both ends, the first clamping portion 10 facilitates the connection between the pump head connector 2 and the pump body 3, ensures that the connecting channels correspond to each other, and facilitates the subsequent installation of the pump head 1 and the fixation of the fastener 4; the first clamping portion 10 prevents the pump head connector 2 from sliding on the mating surface with the pump body 3.

[0025] Combine Figure 2 and Figure 3 As shown, the first clamping portion 10 includes an annular portion 1002 and a protruding portion 1001. The plunger rod 5 is located inside the annular portion 1002, the fastener 4 is located outside the annular portion 1002, and the protruding portion 1001 is connected to the outer wall of the annular portion 1002. The first clamping portion 10 uses the annular portion 1002 to prevent the outflow of liquid from the center of the pump body 3, improve the sealing performance of the mating surface between the pump head connector 2 and the pump body 3, and limit the movement of the pump head connector 2 perpendicular to the axis of the plunger rod 5. The first clamping portion 10 uses the protruding portion 1001 to limit the relative rotation of the pump head connector 2. The protruding portion 1001 is located on the outer wall of the annular portion 1002, which facilitates the processing of the protruding portion 1001.

[0026] like Figure 4As shown, a sealing groove is provided on one side of the pump head 1 close to the pump head connector 2. The sealing groove cooperates with the plunger rod 5. A high-pressure sealing structure is provided inside the sealing groove, and the high-pressure sealing structure surrounds the plunger rod 5. The plunger rod 5 is provided with a spring in the pump body 3. One end of the plunger rod 5 reciprocates inside the pump head 1. The other end of the plunger rod 5 is connected to the power device in the pump body 3. The spring and the power device cooperate to achieve the reciprocating motion of the plunger rod 5 in the pump head 1. The pump head 1 has a joint with other parts. The plunger rod 5 reciprocates inside the pump head 1, which easily brings out liquid. The high-pressure sealing structure is provided to ensure the sealing of the joint between the pump head 1 and other parts. The high-pressure sealing structure cooperates with the plunger rod 5 to reduce the wear of the joint between the pump head 1 and other parts during the reciprocating motion of the plunger rod 5.

[0027] like Figure 5 As shown, the high-pressure sealing structure includes a first sealing sleeve 6 and a sealing pressure ring 7. One end of the first sealing sleeve 6 abuts the pump head connector 2, and the other end of the sealing pressure ring 7 abuts the pump head 1. The high-pressure sealing structure uses the first sealing sleeve 6 to contact the plunger rod 5, improving the axial sealing performance of the plunger rod 5 and reducing wear of the plunger rod 5 during reciprocating motion. The sealing pressure ring 7 cooperates with the fastener 4. The preload applied during the tightening of the fastener 4 causes the sealing pressure ring 7 to squeeze the first sealing sleeve 6, improving the sealing effect of the high-pressure sealing structure.

[0028] like Figure 5 As shown, the high-pressure sealing structure further includes a second sealing sleeve 8 , and a groove is provided on the side of the first sealing sleeve 6 close to the sealing pressure ring 7 , and the sealing pressure ring 7 squeezes and fixes the second sealing sleeve 8 in the groove of the first sealing sleeve 6 .

[0029] like Figure 5 As shown, the second sealing sleeve 8 has an annular cavity therein, and the annular cavity is provided with a sealing ring 9. The side of the second sealing sleeve 8 that cooperates with the plunger rod 5 is provided with a first tooth pattern, and the side of the second sealing sleeve 8 that cooperates with the sealing pressure ring 7 is provided with a second tooth pattern.

[0030] Through the above arrangement, the second sealing sleeve 8 contacts the plunger rod 5 and cooperates with the first sealing sleeve 6 to further improve the sealing performance of the high-pressure sealing structure; the second sealing sleeve 8 is used to fix the sealing ring 9 to prevent the reciprocating motion of the plunger rod 5 from causing the sealing ring 9 to move on the surface of the plunger rod 5; since the second sealing sleeve 8 is clamped and fixed by the sealing pressure ring 7 and the first sealing sleeve 6, the sealing performance of the matching surface between the second sealing sleeve 8 and the plunger rod 5 depends on the machining accuracy of the radial dimension of the second sealing sleeve 8, and the first tooth pattern is used to form a liquid storage space, which can block the liquid from flowing out along the surface of the plunger rod 5, improve the sealing performance between the second sealing sleeve 8 and the plunger rod, and reduce the machining accuracy of the radial dimension of the second sealing sleeve 8; since the second sealing sleeve 8 is clamped and fixed by the sealing pressure ring 7 and the first sealing sleeve 6, the second sealing sleeve 8 is squeezed by the sealing pressure ring 7, and the second tooth pattern is set on the matching surface of the second sealing sleeve 8 and the sealing pressure ring 7, which is conducive to the expansion of the second sealing sleeve 8 and avoids the second sealing sleeve 8 from being damaged and failing due to excessive preload force of the fastener.

[0031] The present invention provides a stud-jointed detachable pump head structure, which makes the pump head 1 and the plunger rod 5 in the pump body 3 easy to disassemble parts through the cooperation of the fastener 4 and the pump head connector 2, which is beneficial to industries with high production standards, such as the food and medicine industry, for disinfection and washing after equipment shutdown or production adjustment; for customers with wide flow range requirements for the plunger pump, different pump heads 1 can be purchased to reduce procurement costs; the plunger rod 5 in the pump body 3 frequently reciprocates and its end is continuously impacted by the material, which is a wearing part. The detachable plunger rod 5 is convenient for subsequent repair and replacement of the plunger pump, reducing the maintenance and warranty costs of the customer's plunger pump, and has the following beneficial effects: it is beneficial to assemble the pump head 1 and the pump body 3 by adjusting the thickness of the pump head connector 2, which is beneficial to reducing The processing requirements of the pump head 1 and the pump body 3, and the surface of the pump head connector 2 are trimmed to ensure the tight connection of the matching surfaces of the pump head 1, the pump head connector 2 and the pump body 3, so as to avoid the reduction of the sealing performance of the matching surfaces of the pump head 1, the pump head connector 2 and the pump body 3 after multiple disassembly; the pump head connector 2 is fixed by the pre-tightening force applied by the fastener 4 on the pump head 1 and the pump body 3, so as to avoid the need for the pump head connector 2 to be processed with the pump head 1 and the threaded hole that matches the pump head 1, thereby reducing the processing difficulty; the plunger rod 5 reciprocates inside the pump head 1, which is easy to bring out liquid, and a high-pressure sealing structure is set to ensure the sealing performance of the joints between the pump head 1 and other components, and the high-pressure sealing structure cooperates with the plunger rod 5 to reduce the wear of the plunger rod 5 at the joints between the pump head 1 and other components during the reciprocating motion of the plunger rod 5.

[0032] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any person skilled in the art may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. A stud-jointed detachable pump head structure, comprising a pump head (1), a plunger rod (5) and a pump body (3), characterized in that: The stud docking type detachable pump head structure is provided with a fastener (4), a pump head connector (2) is provided between the pump head (1) and the pump body (3), the fastener (4) passes through the pump head connector (2) to connect the pump head (1) and the pump body (3), one end of the fastener (4) connected to the pump body (3) is a connecting end, and one end of the fastener (4) connected to the pump head (1) is a fixed end; a part of the fixed end of the fastener (4) extends out of the surface of the pump head (1) away from the pump head connector (2), and the other part of the fixed end of the fastener (4) is located inside the pump head (1).

2. A stud docking type detachable pump head structure according to claim 1, characterized in that: The fastener (4) is a double-headed stud, and a nut (11) is provided at the fixed end of the fastener (4).

3. A stud docking type detachable pump head (1) structure according to claim 1, characterized in that: A first clamping portion (10) is provided on a side of the pump head connector (2) close to the pump body (3), and the first clamping portion (10) cooperates with the pump body (3).

4. A stud docking type detachable pump head structure according to claim 3, characterized in that: The first clamping portion (10) comprises an annular portion (1002) and a protruding portion (1001), the plunger rod (5) is located inside the annular portion (1002), the fastener (4) is located outside the annular portion (1002), and the protruding portion (1001) is connected to the outer wall of the annular portion (1002).

5. The stud docking type detachable pump head structure according to claim 2, characterized in that: A sealing groove is provided on one side of the pump head (1) close to the pump head connector (2), the sealing groove cooperates with the plunger rod (5), a high-pressure sealing structure is provided inside the sealing groove, and the high-pressure sealing structure surrounds the plunger rod (5).

6. The stud-jointed detachable pump head structure according to claim 5, characterized in that: The high-pressure sealing structure comprises a first sealing sleeve (6) and a sealing pressure ring (7), wherein one end of the first sealing sleeve (6) abuts against the pump head connector (2), and the other end of the sealing pressure ring (7) abuts against the pump head (1).

7. The stud docking type detachable pump head structure according to claim 6, characterized in that: The high-pressure sealing structure further comprises a second sealing sleeve (8), a groove is provided on a side of the first sealing sleeve (6) close to the sealing pressure ring (7), and the sealing pressure ring (7) squeezes and fixes the second sealing sleeve (8) in the groove of the first sealing sleeve (6).

8. The stud docking type detachable pump head structure according to claim 7, characterized in that: An annular cavity is provided in the second sealing sleeve (8), and a sealing ring (9) is provided in the annular cavity.

Images