Pump head assembly and plunger pump
By designing the drain valve core in the pump head assembly to slide and be guided within the drain valve sleeve, combined with the same structure as the suction valve core, the problem of easy wear and breakage of the drain valve core is solved, thereby improving the service life and operating efficiency of the pump.
Patent Information
- Application Number
- CN202423263498.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the prior art, the guide part of the discharge valve core of the pump head assembly has low structural strength and is prone to wear and breakage, which affects the service life and operating efficiency of the plunger pump.
Design a pump head assembly in which one end of the drain valve core is located inside the drain valve sleeve and slides along the drain valve sleeve, is guided by the drain valve sleeve, and the drain valve core and the suction valve core adopt the same structure to improve its reliability and reusability.
The structure of the drain valve core has been improved, wear has been reduced, breakage of the guide part has been avoided, the failure rate has been reduced, the reusability of parts has been increased, and the number of spare parts has been reduced.
Smart Images
Figure CN223923265U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of plunger pump technology, and in particular to a pump head assembly and a plunger pump. Background Technology
[0002] The pump head of the emulsion pump has a hollow chamber structure. The chamber is equipped with a suction valve assembly, a discharge valve assembly, and a diaphragm assembly. When the plunger retracts, the pressure in the plunger chamber decreases, and the low-pressure liquid is drawn into the diaphragm through the suction valve assembly. When the plunger advances, the suction valve assembly closes, the pressure of the emulsion in the diaphragm increases, and the emulsion is discharged from the pump head through the discharge valve assembly.
[0003] In the prior art, the valve seats, valve cores and springs of the suction valve assembly and the discharge valve assembly of the pump head assembly are different, resulting in a low parts reuse rate. Furthermore, the guide part of the discharge valve core has low structural strength and is prone to wear and breakage. It is easy for the broken parts to enter the plunger cavity, causing damage to multiple parts in the plunger cavity and seriously affecting the service life and operating efficiency of the plunger pump. Utility Model Content
[0004] This disclosure aims to at least address the technical problem of low structural strength of the guide portion of the drain valve core in the prior art.
[0005] Therefore, one object of this disclosure is to provide a pump head assembly, including a pump head body, on which a liquid suction inlet and a liquid discharge outlet are provided. A liquid discharge valve assembly and a liquid suction valve assembly are sequentially arranged along a first direction inside the pump head body. The liquid discharge valve assembly includes a liquid discharge valve seat, a liquid discharge valve core, a liquid discharge valve sleeve, and a liquid discharge spring. A liquid discharge through hole is provided on the liquid discharge valve seat. One end of the liquid discharge valve core is slidably connected to the liquid discharge valve sleeve, and the other end of the liquid discharge valve core corresponds to the liquid discharge valve seat. The movement of the liquid discharge valve core connects or closes the liquid discharge through hole and the liquid discharge outlet. The liquid discharge spring is disposed between the liquid discharge valve core and the liquid discharge valve sleeve.
[0006] In some embodiments, a bushing is provided inside the drain valve sleeve, and one end of the drain valve core is disposed inside the bushing.
[0007] In some embodiments, the drain valve core includes a first base and a first guide portion extending outward from the first base, the first base corresponding to the drain through hole, and the first guide portion being movably connected to the bushing.
[0008] In some embodiments, the bushing has a through hole on its outer periphery, and the drain valve sleeve has a groove at one end near the drain valve core.
[0009] In some embodiments, a limiting step is provided inside the drainage hole, and the first base cooperates with the limiting step to seal the drainage hole.
[0010] In some embodiments, the drain valve seat and the pump head body are clearance-fitted.
[0011] In some embodiments, the pump head assembly further includes a spacer assembly, wherein the drain valve assembly and the suction valve assembly are disposed on both sides of the spacer assembly to isolate the drain valve assembly and the suction valve assembly.
[0012] In some embodiments, the liquid suction valve assembly includes a liquid suction valve seat, a liquid suction valve core, and a liquid suction spring. The liquid suction valve seat and the liquid suction valve core are disposed opposite to each other. The liquid suction valve seat is provided with a liquid suction through hole. The liquid suction valve core is slidably connected to the spacer assembly. The liquid suction spring is disposed between the liquid suction valve core and the spacer assembly. The movement of the liquid suction valve core connects or closes the liquid suction through hole and the liquid suction inlet.
[0013] In some embodiments, the liquid suction valve core and the liquid discharge valve core have the same structure. The liquid suction valve core includes a second base and a second guide portion extending outward from the second base. The second base corresponds to the liquid suction through hole, and the second guide portion is movably connected to the spacer assembly.
[0014] Another object of this disclosure is to provide a plunger pump, including the pump head assembly described above.
[0015] The pump head assembly and plunger pump provided in this disclosure have the following beneficial effects:
[0016] The pump head assembly provided in this embodiment has one end of the drain valve core disposed inside the drain valve sleeve and sliding along the drain valve sleeve. The drain valve core is guided by the drain valve sleeve, and the contact area between it and the drain valve sleeve is large, which makes the structure of the drain valve core more reliable, reduces the wear of the drain valve core, and prevents the guide part of the drain valve core from breaking and entering the plunger cavity, damaging the components and reducing the failure rate. The drain valve core can be made with the same structure as the suction valve core, which improves the reusability of parts and reduces the number of spare parts. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a cross-sectional view of the pump head assembly in an embodiment of this disclosure;
[0019] Figure 2This is a partial enlarged view of the suction valve assembly in an embodiment of this disclosure;
[0020] Figure 3 This is a partial enlarged view of the drain valve assembly in an embodiment of this disclosure.
[0021] Figure label:
[0022] 1. Pump head body; 11. Suction inlet; 12. Discharge inlet; 13. Hollow cavity; 14. First mounting hole; 15. Suction chamber; 16. Discharge chamber; 17. End cap; 2. Suction valve assembly; 21. Suction valve seat; 221. Second base; 222. Second guide part; 22. Suction valve core; 23. Suction spring; 24. Suction through hole; 3. Discharge valve assembly; 31. Discharge valve seat; 32. Discharge valve core; 321. First base; 322. First guide part; 33. Discharge valve sleeve; 331. Groove; 332. Bushing; 34. Discharge spring; 35. Discharge through hole; 351. Limiting step; 4. Spacer assembly; 41. Spacer body; 42. First through hole; 43. Guide sleeve. Detailed Implementation
[0023] Various embodiments and features of this disclosure are described herein with reference to the accompanying drawings.
[0024] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.
[0025] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.
[0026] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.
[0027] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.
[0028] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.
[0029] Specific embodiments of this disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this disclosure, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure this disclosure. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use this disclosure in a variety of substantially any suitable detailed structures.
[0030] The first embodiment of this disclosure provides a pump head assembly, such as Figures 1-3 As shown, the pump head assembly includes a pump head body 1, a suction valve assembly 2, a discharge valve assembly 3, and a spacer assembly 4. The pump head body 1 has a suction inlet 11 and a discharge outlet 12. The end of the pump head body 1 mates with an end cap 17. The pump head body 1 has a hollow cavity 13. The suction valve assembly 2 and the discharge valve assembly 3 are sequentially installed in the hollow cavity 13 along a first direction. Here, the first direction refers to the suction valve assembly 2 and the discharge valve assembly 3 being arranged opposite each other, for example, vertically. A first mounting hole 14 is provided on the side of the pump head body 1, and one end of a plunger is inserted into the first mounting hole 14. When the plunger extends and retracts, it reciprocates within the hollow cavity 13, changing the pressure on the suction valve assembly 2 and the discharge valve assembly 3, thereby adjusting the opening state of the suction valve assembly 2 and the discharge valve assembly 3.
[0031] In this embodiment, the suction valve assembly 2 and the drain valve assembly 3 are disposed on both sides of the spacer assembly 4, and the spacer assembly 4 is disposed in the hollow cavity 13 to isolate the drain valve assembly 3 and the suction valve assembly 2. The spacer assembly 4 includes a spacer body 41, and a first through hole 42 is formed in the spacer body 41. A guide sleeve 43 is installed in the first through hole 42.
[0032] Specifically, such as Figure 1 and Figure 2 As shown, a suction chamber 15 communicating with the suction inlet 11 is provided inside the pump head body 1. The suction valve assembly 2 is located on the side near the suction chamber 15. The suction valve assembly 2 includes a suction valve seat 21, a suction valve core 22, and a suction spring 23. The suction valve seat 21 is located at one end of the spacer body 41. The suction valve seat 21 and the suction valve core 22 are arranged opposite to each other. A suction through hole 24 communicating with the suction chamber 15 is provided on the suction valve seat 21. The suction valve core 22 is slidably disposed in a guide sleeve 43 inside the spacer body 41. The guide sleeve 43 guides the suction valve core 22 and increases the strength of the guiding part. The suction spring 23 is disposed between the suction valve core 22 and the spacer body 41. Specifically, when the suction valve core 22 moves upward, it connects the suction through hole 24 and the suction inlet 11; when the suction valve core 22 moves downward, it closes the suction through hole 24 and the suction inlet 11.
[0033] Specifically, the suction valve core 22 includes a second base 221 and a second guide portion 222 extending outward from the second base 221. The second base 221 corresponds to the suction through hole 24, and the second guide portion 222 is movably connected to the spacer assembly 4. Specifically, the second base 221 is used to block the suction through hole 24, and the second guide portion 222 is used to cooperate with the guide sleeve 43. This method has a simple structure; the second base 221 can block the suction through hole 24 simply by covering it with the surface. The cooperation between the suction valve core 22 and the guide sleeve 43 ensures the structural strength of the suction valve core 22 during movement. In this embodiment, the diameter of the second base 221 is larger than the diameter of the suction through hole 24, which is beneficial for a more compact internal structure of the pump head assembly, reducing the volume of the pump head assembly while ensuring a large flow rate through the suction through hole 24.
[0034] In this embodiment, as Figure 1 and Figure 3 As shown, a drainage chamber 16 communicating with the drainage outlet 12 is provided inside the pump head body 1. The drainage valve assembly 3 is located on the side near the drainage outlet 12. The drainage valve assembly 3 includes a drainage valve seat 31, a drainage valve core 32, a drainage valve sleeve 33, and a drainage spring 34. The drainage valve seat 31 is located at the other end of the spacer body 41. One end of the drainage valve core 32 can slide within the drainage valve sleeve 33, and the other end of the drainage valve seat 31 is opposite to the drainage valve core 32. A bushing 332 is provided inside the drainage valve sleeve 33. One end of the drainage valve core 32 is located inside the bushing 332. A drainage through hole 35 is provided on the drainage valve seat 31, and a liquid passage hole (not shown in the figure) is provided on the drainage valve sleeve 33. The drainage through hole 35 communicates with the drainage chamber 16 through the liquid passage hole. The drainage spring 34 is located between the drainage valve core 32 and the drainage valve sleeve 33. Specifically, the drain valve core 32 moves upward to connect the drain through hole 35 and the drain outlet 12, and the drain valve core 32 moves downward to cut off the drain through hole 35 and the drain outlet 12.
[0035] Furthermore, the structure of the drain valve core 32 is the same as that of the suction valve core 22, including a first base 321 and a first guide portion 322 extending outward from the first base 321. The first base 321 is used to block the drain through hole 35, and the first guide portion 322 is used to movably connect with the bushing 332, thereby improving the strength and wear resistance of the drain valve core 32 and preventing the guide portion (first guide portion 322) of the drain valve core 32 from breaking and entering the plunger cavity, thus damaging the components. In this embodiment, the drain through hole 35 can be blocked by the first base 321 covering the surface of the drain through hole 35. Making the diameter of the first base 321 larger than the diameter of the drain through hole 35 is beneficial for a more compact internal structure of the pump head assembly, reducing the volume of the pump head assembly while ensuring the flow rate of the drain through hole 35.
[0036] Specifically, the first guide portion 322 is disposed within the bushing 332, and the drainage valve core 32 and the bushing 332 cooperate to ensure the structural strength for the movement of the drainage valve core 32. A through hole 333 is provided on the outer periphery of the bushing 332, and a groove 331, which is an annular groove, is provided at one end of the drainage valve sleeve 33 near the drainage valve seat 321. The bushing 332 and the drainage valve sleeve 33 are clearance-fitted, and the through hole 333 connects the upper cavity of the drainage valve core 32 to the drainage through hole 35 or the upper cavity of the drainage valve core 32 to the groove 331, forming a gas channel to balance the pressure and ensure that the drainage valve core 32 can reciprocate.
[0037] Furthermore, a limiting step 351 is provided inside the drain hole 35 to limit the drain valve core 32, and part of the structure of the drain valve core 32 extends into the drain hole 35, making the structure more compact.
[0038] Furthermore, the suction valve core 22 includes a second base 221 and a second guide portion 222 extending outward from the second base 221. The second base 221 corresponds to the suction through hole 24, and the second guide portion 22 is movably connected to the guide sleeve 43 of the spacer assembly. The suction valve core 22 and the discharge valve core 32 are configured with identical structures, and the suction spring 23 and the discharge spring 34 are configured with identical structures, which improves the reusability of parts, reduces the number of spare parts, and makes maintenance easier.
[0039] Furthermore, the clearance fit between the suction valve seat 21 and the pump head body 1, and the clearance fit between the discharge valve seat 31 and the pump head body 1, make it easier to install and disassemble the suction valve seat 21 and the discharge valve seat 31 compared to the interference fit and the transition fit.
[0040] The second embodiment of this disclosure provides a plunger pump, including the above-described pump head assembly for pumping emulsion, a crankcase assembly for connecting to a main drive motor to transmit power, and a hydraulic conversion component for converting the mechanical power of the crankcase into the hydraulic change of the pump head assembly, wherein one end of the hydraulic conversion component is connected to the crankcase assembly and the other end is connected to the pump head assembly.
[0041] This pump head assembly uses the same suction valve core 22 and discharge valve core 32, which improves the reusability of parts and reduces the number of spare parts. In addition, the discharge valve core 32 has the same structure as the suction valve core 22, which has higher reliability, reduces the wear of the original discharge valve core 32, and prevents the guide part of the discharge valve core 32 from breaking and entering the plunger cavity, damaging the parts and reducing the failure rate.
[0042] When the plunger pump is in operation, the rotary motion input by the main drive motor is converted into the reciprocating linear motion of the plunger, causing a change in the volume of the hollow cavity 13 in the pump head assembly. When the plunger retracts, the pressure in the hollow cavity 13 decreases, the suction valve core 22 opens, and the discharge valve core 32 closes. That is, the low-pressure liquid enters the hollow cavity 13 through the suction chamber 15, which pushes open the suction valve core 22. This process completes the suction. When the plunger moves forward, the volume of the hollow cavity 13 decreases, the suction valve core 22 closes, and the discharge valve core 32 opens. The suction valve core 22 moves downward and presses against the suction valve seat 21 to achieve a seal. At the same time, the high-pressure liquid in the hollow cavity 13 pushes upward and opens the discharge valve core 32. The high-pressure liquid is discharged from the hydraulic end. This process completes the discharge.
[0043] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0044] In the description of this disclosure, "first feature" and "second feature" may include one or more of the features.
[0045] In the description of this disclosure, "multiple" means two or more.
[0046] In the description of this disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.
[0047] In the description of this disclosure, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.
[0048] In the description of this disclosure, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.
Claims
1. A pump head assembly, characterized by, The pump head assembly comprises a pump head body, a liquid suction inlet and a liquid discharge outlet arranged on the pump head body, a liquid discharge valve assembly and a liquid suction valve assembly arranged in sequence in the pump head body along a first direction, the liquid discharge valve assembly comprising a liquid discharge valve seat, a liquid discharge valve core, a liquid discharge valve sleeve and a liquid discharge spring, the liquid discharge valve seat being provided with a liquid discharge through hole, one end of the liquid discharge valve core being slidably connected in the liquid discharge valve sleeve, the other end of the liquid discharge valve core corresponding to the liquid discharge valve seat, the liquid discharge valve core moving to connect or cut off the liquid discharge through hole and the liquid discharge outlet, and the liquid discharge spring being arranged between the liquid discharge valve core and the liquid discharge valve sleeve.
2. The pump head assembly of claim 1, wherein, A bushing is arranged in the liquid discharge valve sleeve, and one end of the liquid discharge valve core is arranged in the bushing.
3. The pump head assembly of claim 2, wherein, The liquid discharge valve core comprises a first base and a first guide portion extending outwardly from the first base, the first base corresponding to the liquid discharge through hole, and the first guide portion movably connected with the bushing.
4. The pump head assembly of claim 2, wherein, A through hole is arranged on the outer periphery of the bushing, and a groove is arranged on one end of the liquid discharge valve sleeve close to the liquid discharge valve core.
5. The pump head assembly of claim 3, wherein, A limiting step is arranged in the liquid discharge through hole, and the first base cooperates with the limiting step to block the liquid discharge through hole.
6. The pump head assembly of claim 3, wherein, The liquid discharge valve seat and the pump head body are gap-fitted.
7. The pump head assembly of claim 1, wherein, The pump head assembly further comprises a spacer sleeve assembly, and the liquid discharge valve assembly and the liquid suction valve assembly are arranged on both sides of the spacer sleeve assembly to isolate the liquid discharge valve assembly and the liquid suction valve assembly.
8. The pump head assembly of claim 7, wherein, The liquid suction valve assembly comprises a liquid suction valve seat, a liquid suction valve core and a liquid suction spring, the liquid suction valve seat and the liquid suction valve core being oppositely arranged, the liquid suction valve seat being provided with a liquid suction through hole, the liquid suction valve core being slidably connected with the spacer sleeve assembly, and the liquid suction spring being arranged between the liquid suction valve core and the spacer sleeve assembly, the liquid suction valve core moving to connect or cut off the liquid suction through hole and the liquid suction inlet.
9. The pump head assembly of claim 8, wherein, The liquid suction valve core and the liquid discharge valve core are of the same structure, the liquid suction valve core comprising a second base and a second guide portion extending outwardly from the second base, the second base corresponding to the liquid suction through hole, and the second guide portion movably connected with the spacer sleeve assembly.
10. A piston pump characterized in that The pump head assembly comprises any one of claims 1-9.