Pneumatic dual diaphragm pump with accessible feature

Abstract

A pneumatic double diaphragm pump (10) includes a selectively removable valve body (45) to facilitate repair and maintenance. The pump (10) comprises an inlet (3), an outlet (2), and first and second diaphragm chamber housings (14, 16), each defining a diaphragm chamber. A valve body housing (44) is arranged between the first and second diaphragm chamber housings (14, 16). A valve body (45) disposed within the valve body housing (44) is in fluid communication with the diaphragm chambers of the first and second diaphragm chamber housings (14, 16), and includes a pilot signal port, a diaphragm chamber inlet port, and a chamber outlet port, all of which are accessible at a signal surface (48) of the valve body housing (44). The signal surfaces (48) may be located on the same side of the valve body housing (44). In order to stabilize the pump (10) during repair and maintenance, a stabilizing foot (138) may project from an outer edge of the diaphragm chamber housing (14, 16).

Description

Technical Field

[0001] This application claims priority to U.S. Provisional Application No. 63 / 331,980, filed on April 18, 2022, the entire contents of which are incorporated herein by reference. Background Art

[0002] Fluid-operated pumps (e.g., diaphragm pumps) are widely used for pumping liquids, solutions, viscous materials, slurries, suspensions or flowable solids. It is well known that double diaphragm pumps are used for pumping viscous or solid-containing liquids, as well as for pumping ordinary water or other liquids, and high-viscosity or low-viscosity solutions based on these liquids. Therefore, such double diaphragm pumps have been widely used for pumping sump pits, shafts and pits, and are generally used for handling various slurries, sludges and liquids containing waste. Fluid-driven diaphragm pumps offer certain further advantages in terms of convenience, effectiveness, portability and safety. Double diaphragm pumps are rugged and compact, and for maximum flexibility, are usually served by a single suction line and a short manifold to deliver the liquid to a single discharge line.

[0003] Although known diaphragm pumps perform well for their intended purpose, they suffer from several disadvantages. Conventional double diaphragm pumps have a main air valve body containing a main air valve assembly and a pilot air valve body containing a pilot valve assembly. The valve bodies are mechanically coupled together and require the use of seals to prevent leakage. Servicing these valve assemblies typically requires removing the pump from its mounting location or removing the pump chamber. Furthermore, servicing typically requires the pump to be removed entirely. When the pump is disassembled, the pilot actuator pin that interacts with the diaphragm and pilot valve core may be located inside the valve sleeve and prevent removal of the pilot valve assembly. Furthermore, when servicing the pump, the pump chamber is susceptible to tipping over or rolling away due to its round shape.

[0004] Furthermore, retrieving pump performance information from conventional double diaphragm pumps for controlling the pumping process and diagnosing performance issues is costly and cumbersome. Conventional systems require chamber modifications and the integration of pins and sensors to measure the internal chamber pressure for stroke counting or leak detection. Additionally, conventional double diaphragm pumps are often made of conductive materials for operational purposes, but this also increases the cost of the overall pump.

[0005] Therefore, there is a need in the art for a double diaphragm pump having a single valve body that is selectively removable from the double diaphragm pump to facilitate maintenance. Additionally, there is a need in the art for a double diaphragm pump in which information about the performance of the pump is more easily obtained without requiring expensive modifications to the pump. Additionally, there is a need in the art for reducing the amount of conductive material used to construct the pump to reduce costs. Summary of the invention

[0006] This Summary is provided to introduce some concepts in a simplified form that are further described in the Detailed Description below. This Summary is not intended to identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

[0007] In one embodiment, an air-operated double diaphragm pump may include an inlet and an outlet. In addition, the pump may include a first diaphragm housing and a second diaphragm housing, each of the diaphragm housings defining a diaphragm chamber. A valve body housing is disposed between the first diaphragm chamber housing and the second diaphragm chamber housing. The valve body is disposed within the valve body housing. The valve body is in fluid communication with the diaphragm chambers of the first diaphragm chamber housing and the second diaphragm chamber housing, and includes a pilot signal port, a diaphragm chamber inlet port, and a chamber exhaust port, all of which are accessible at a signal surface of the valve body.

[0008] To achieve the above and related purposes, the following description and accompanying drawings set forth certain illustrative aspects and embodiments. These are merely indicative of a few of the various ways in which one or more aspects may be employed. Other aspects, advantages, and novel features of the present disclosure will become apparent from the following detailed description when considered in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The subject matter of the present disclosure may take physical form in certain components and arrangements of components, which will be described in detail in this specification and illustrated in the accompanying drawings which form a part hereof, in which:

[0010] Figure 1A , 1B and 1C show various views of some embodiments of an air-operated double diaphragm pump having accessible features as described herein;

[0011] Figure 2 A perspective view showing some embodiments of a selectively removable valve body external to an air-operated double diaphragm pump as described herein;

[0012] Figure 3A shows a front perspective view of some embodiments of the selectively removable valve body described herein;

[0013] Figure 3B shows a rear perspective view of some embodiments of the selectively removable valve body described herein;

[0014] Figure 4 shows exploded views of some embodiments of the selectively removable valve bodies described herein;

[0015] Figure 5A , 5B and 5C show various views of some embodiments of the selectively removable valve body within the valve body housing described herein;

[0016] Figure 6 shows exploded views of some embodiments of the pilot valve assemblies described herein;

[0017] Figure 7 shows an exploded view of some embodiments of the main fluid valve assembly described herein;

[0018] Figure 8 A perspective view showing some embodiments of a muffler for an air-operated double diaphragm pump as described herein;

[0019] Fig. 9 shows a front view of some embodiments of the central portion of the pump described herein;

[0020] Fig. 10A and 10B showing cross-sectional views of some embodiments of the selectively removable valve bodies of the pumps described herein;

[0021] Fig.11 shows a side view of some embodiments of a central portion of a pump described herein;

[0022] Fig.12 shows a side view of some embodiments of a diaphragm chamber housing of a pump described herein;

[0023] Fig.13 A cross-sectional view showing some embodiments of the central portion of the pump described herein, the pilot inlet, and the main passage of the valve body;

[0024] Fig.14A , 14B and 14C show various cross-sectional views of some embodiments of the central portion of the pump described herein when the pilot valve assembly is in various positions;

[0025] Fig.15A and 15B A cross-sectional view showing some embodiments of the central portion of the pump described herein including a main fluid valve core located in multiple positions;

[0026] Fig.16 Front view of some embodiments of an air-operated double diaphragm pump showing the accessibility features described herein. DETAILED DESCRIPTION

[0027] The claimed subject matter is now described with reference to the accompanying drawings, wherein the same reference numerals are generally used to represent the same elements. In the following description, for the purpose of explanation, many specific details are set forth in order to provide a thorough understanding of the claimed subject matter. However, it is apparent that the claimed subject matter can still be implemented without these specific details. In other cases, for ease of describing the claimed subject matter, structures and devices are shown in block diagram form.

[0028] Reference Figure 1A , 1B and 1C, the pneumatic double diaphragm pump 10 is described. Figure 1B Show Figure 1A perspective view of the side. Figure 1C A cross-sectional view may correspond to Figure 1B The pump 10 may include an inlet housing 11, an outlet housing 12, a first diaphragm chamber housing 14, a second diaphragm chamber housing 16, and a center portion 18 disposed between the first diaphragm chamber housing 14 and the second diaphragm chamber housing 16. The first diaphragm chamber housing 14 may include a first diaphragm assembly 22 including a first diaphragm 24 and a second diaphragm plate 26. The first diaphragm 24 may be coupled to the first diaphragm plate 26 and may extend through the first diaphragm chamber housing 14 to form a movable wall defining a first pump chamber 28 and a first diaphragm chamber 30. The second diaphragm chamber housing 16 may be substantially identical to the first diaphragm chamber housing 14 and may include a second diaphragm assembly 32 including a second diaphragm 34 and a second diaphragm plate 36. The second diaphragm 34 may be coupled to the second diaphragm plate 36 and may extend through the second diaphragm chamber housing 16 to define a second pump chamber 38 and a second diaphragm chamber 40. The connecting rod 42 is operably connected to the first diaphragm plate 26 and the second diaphragm plate 36 and extends between the first diaphragm plate 26 and the second diaphragm plate 36 .

[0029] Each of the first pump chamber 28 and the second pump chamber 38 includes an inlet check valve 9 located at the inlet end of the first pump chamber 28 or the second pump chamber 38, respectively, and an outlet check valve 13 located at the outlet end of the first pump chamber 28 or the second pump chamber 38, respectively. The inlet check valve 9 and the outlet check valve 13 can be selectively opened and closed to allow fluid to flow into and out of the first pump chamber 28 and / or the second pump chamber 38. In some embodiments, the inlet check valve 9 and / or the outlet check valve 13 can be as follows Figure 1CThe ball check valve shown. In some other embodiments, the inlet check valve 9 and / or the outlet check valve 13 can be some other types of valves, such as a flap valve, a spring valve or some other suitable check valve. When one of the inlet check valves 9 is in the closed position, the other inlet check valve 9 is in the open position. Similarly, when one of the inlet check valves 9 is in the closed position, the outlet check valve 13 located directly above the closed inlet check valve 9 is in the open position to allow the corresponding pump chamber 28 or 38 to be filled with fluid.

[0030] During operation of the pump 10, the main inlet 3 can receive fluid pumped into the first pump chamber 28 and the second pump chamber 38 by the inlet housing 11. When the inlet check valve 9 of the first pump chamber 28 is opened, the inlet check valve 9 of the second pump chamber 38 is closed, the outlet check valve 13 of the first pump chamber 28 is closed, and the outlet check valve 13 of the second pump chamber is opened. In addition, when the inlet check valve 9 of the first pump chamber 28 is opened, the fluid flows into the first pump chamber 28 and forces the first diaphragm 26 to compress the first diaphragm chamber 30. The first diaphragm 26 moves toward the central portion 18 and forces air to enter the second diaphragm chamber 40. When the air fills the second diaphragm chamber 40, the second diaphragm 36 moves toward the second pump chamber 38, thereby forcing the fluid to leave the second pump chamber 38 via the outlet check valve 13 of the second pump chamber 38 and the main outlet 2. Because the first diaphragm 26 and the second diaphragm 36 are connected by the connecting rod 42, they move in series. Once the first pump chamber 28 is filled with fluid, the inlet check valve 9 and the outlet check valve 13 change positions so that when the fluid flows out of the first pump chamber 28, the fluid begins to flow into the second pump chamber 38. This process can be repeated continuously to provide continuous fluid flow between the main inlet 3 and the main outlet 2.

[0031] Due to this ongoing pumping process, various components of the pump 10 may require cleaning, replacement, or other maintenance throughout the useful life of the pump 10. As will be discussed further herein, several features of the pump 10 are configured to reduce damage to the pump, reduce pump downtime for maintenance, and increase access to maintenance of various components of the pump, thereby improving overall pump performance and life.

[0032] Now refer to Figure 2 , a partially exploded view is shown to illustrate that in some embodiments, the central portion 18 of the pump 10 can include a valve body 45 disposed within a valve body housing 44. The valve body housing 44 is disposed between the first diaphragm chamber housing 14 and the second diaphragm chamber housing 16.

[0033] Additional references Figure 3A , 3B and Figure 4, the valve body 45 may include a first pilot inlet port 70 and a second pilot inlet port 72, a first main channel 74 and a second main channel 76, a pilot valve hole 46, a main fluid valve hole 47, a pilot valve assembly 61 and a main fluid valve assembly 89. In some embodiments, the valve body 45 may include a first pilot signal port 51, a second pilot signal port 52, a first compressed air supply 98, a second compressed air supply 100, a first chamber port 102, a second chamber port 104 and a muffler exhaust port 62. The first compressed air supply 98 and the second compressed air supply 100 supply compressed air to the main fluid valve assembly 89. The first chamber port 10 and the second chamber port 104 are used for chamber exhaust and chamber pressurization. The first pilot signal port 51 and the second pilot signal port 52 are connected to the first main channel 74 and the second main channel 76, respectively. In some other embodiments (for example, as Figure 5B As shown in FIG. 4 , the first pilot signal port 51 and the second pilot signal port 52 may be omitted from the valve body 45 .

[0034] The valve body 45 may include a valve body signal surface 48. The valve body signal surface 48 may be substantially planar and may include a first pilot signal port 51, a second pilot signal port 52, a first compressed air supply 98, a second compressed air supply 100, a first chamber port 102, a second chamber port 104, and a muffler exhaust port 62. The first compressed air supply 98 is fluidly connected to the first chamber port 102 to provide and receive compressed air to the first diaphragm chamber housing 14. The second compressed air supply 100 is fluidly connected to the second chamber port 104 to provide and receive compressed air to the second diaphragm chamber housing 16. The location of all of these ports on a plane on the same side of the valve body 45 may simplify monitoring and diagnostics of the pump. For example, only a removable plate (e.g., Figure 5B 91) and the front gasket (e.g. Figure 5B 93), each port on the valve body signal surface 48 can be accessed to monitor, diagnose and / or maintain the ports on the valve body signal surface 48.

[0035] The pilot valve assembly 61 may be disposed within the pilot valve hole 46. The first pilot inlet port 70 and the second pilot inlet port 72 are connected to each other and serve as a compressed air supply for the pilot valve assembly 61. Figure 3BAs shown, the first pilot inlet port 70 and the second pilot inlet port 72 are located on the rear side of the valve body 45. Because the first pilot inlet port 70 and the second pilot inlet port 72 are located on the rear side of the valve body 45, if the valve body 45 is accessed only from the front side for maintenance, the first pilot inlet port 70 and the second pilot inlet port 72 are not disturbed. For example, the valve body housing 44 can be opened to access the front side of the valve body 45 without actually removing the valve body 45 from the valve body housing 44. Then, when accessing the front side of the valve body 45, the rear side of the valve body 45 including the first pilot inlet port 70 and the second pilot inlet port 72 remains covered by the valve body housing 44. During maintenance, less interference with the first pilot inlet port 70 and the second pilot inlet port 72 reduces damage, thereby improving the performance of the entire pump 10.

[0036] Additional references Figure 5A , 5B , and 5C, the valve body 45 can be enclosed in the valve body housing 44 and the removable plate 91. The removable plate 91 can be operably connected to the valve body housing 44 by fasteners 95. The fasteners 95 can be or include screws, brackets, bolts, butterfly nuts, etc. Therefore, in order to remove the valve body 45, the fasteners 95 are removed from the valve body housing 44 and the removable plate 91. Then, the removable plate 91 can be removed from the valve body housing 44. In addition, in some embodiments, the front gasket 93 is arranged between the valve body 45 and the removable plate 91. Further, the rear gasket 43 is arranged between the valve body 45 and the valve body housing 44. In this way, after the removable plate 91 is removed from the valve body housing 44, the front gasket 93 is also removed from the valve body housing 44 and the valve body 45. Then, the valve body 45 can be removed from the open side of the valve body housing 44. Therefore, in some embodiments, only one side of the valve body housing 44 needs to be entered, and thus only one side of the entire pump needs to be entered to remove the valve body 45. Furthermore, the valve body 45 may be accessed from the valve body housing 44 by simply removing some of the fasteners 95 , the removable plate 91 , and the front gasket 93 .

[0037] In some embodiments, the removable plate 91 may also be or include a sensor housing, which also facilitates access to each port on the valve body signal surface 48, as well as to the sensors on the removable plate 91. For example, a device may be used to monitor pressure levels and changes through the ports on the valve body signal surface 48 without requiring expensive physical modifications to the pump 10, thereby improving the availability, efficiency, and durability of the pump 10. In addition, in addition to the reduced features of the valve body signal surface 48, this simplified access reduces the risk of damaging the pump 10. This also extends the life of the entire pump 10.

[0038] In some embodiments, Figure 2As shown, for example, the valve body 45 can be selectively removed from the valve body housing 44. Thus, the valve body 45 can be removed from the valve body housing 44 while the rest of the pump 10 can remain stationary. In some embodiments, the valve body 45 is automatically removed using a machine, manually removed by an operator, removed by a machine controlled by an operator, etc. In some embodiments, the valve body 45 includes a handle, a notch, etc., which is used by the machine and / or the operator to firmly grasp the valve body 45 for removal.

[0039] In some embodiments, the valve body 45 can be removed to allow maintenance on the valve body 45 or other components of the pump 10 that are accessible through the valve body housing 44. In some cases, the valve body 45 may fail due to, for example, wear and tear. Because the valve body 45 is removable from the valve body housing 44, the failed valve body 45 can be completely replaced, thereby extending the life of the entire pump 10. Since the valve body 45 can be replaced instead of the entire pump 10, time, materials, and costs are saved. Further, since only fewer features of the pump 10 need to be removed to access the valve body 45 and its components (including the main fluid valve assembly 89 and the pilot valve assembly 61), the risk of damaging components of the pump 10 other than the valve body 45 is reduced, which also extends the life of the entire pump 10.

[0040] In addition, in some embodiments, when the valve body 45 is arranged in the valve body housing 44, the removable plate 91 covers the exposed side of the valve body 45, so that the valve body 45 is completely enclosed in the valve body housing 44 and the removable plate 91. In some embodiments, the surface of the pump 10 includes a conductive material. Since the valve body 45 is in the pump 10, and when the valve body 45 is in the valve body housing 44 and the removable plate 91, the valve body 45 has no surface exposed to the external environment, so the valve body 45 can include a polymer material. Polymer materials are not conductive, and the material cost and manufacturing cost / time are lower than other materials (such as conductive polymers, metals, etc.). Therefore, the cost of the valve body 45 can be reduced due to the arrangement of the valve body 45 in the valve body housing 44. In addition, in some embodiments, the weight of the polymer material can be lighter than that of the metal embodiment, making the removal of the valve body 45 less troublesome. If the weight of the valve body 45 is lighter, the valve body 45 is less likely to fall during the removal process from the valve body housing 44. In other embodiments, the valve body 45 may still include a conductive material, such as a metal, for structural integrity in a particular application, etc. In other embodiments, the valve body 45 may include a combination of conductive and non-conductive materials. For example, in some such other embodiments, at least the air valve within the valve body 45 may include a non-conductive and low-cost polymer material, while the remainder of the valve body 45 may include a conductive metal material.

[0041] like Figure 4As shown, the pilot valve assembly 61 and the main fluid valve assembly 89 are installed in the same valve body 45, which improves the accessibility and convenience of repairing the valve body 45 during removal. In addition, the number of seals connecting the pilot valve assembly 61 and the main fluid valve assembly 89 is reduced, thereby reducing potential leaking joints. The pilot valve assembly 61 and the main fluid valve assembly 89 can be selectively removed from the valve body 45. Therefore, it is also possible to selectively access the components (e.g., 64, 66, 68) of the pilot valve assembly 61 and the components (e.g., 90, 92) of the main fluid valve assembly 89. Therefore, it is also possible to maintain the pilot valve assembly 61 and / or the main fluid valve assembly 89 that can be selectively removed to extend the life of the pump 10. In addition, since the number of seals of the pilot valve assembly 61 and the main fluid valve assembly 89 is reduced, the time required to assemble and remove the valve body 45 is reduced.

[0042] For example, in some embodiments, the pilot valve assembly 61 can be retained in the valve body 45 by the pilot valve retainer 68. The pilot valve retainer 68 can be a snap ring, a retaining ring, a pin, a cover or other mechanical retaining device. The main fluid valve assembly 89 can be retained in the valve body 45 with the valve body cover 39, 59. Alternatively, the main fluid valve assembly 89 can also be retained with a snap ring, a retaining ring, a pin or other commonly used mechanical retaining device. In some cases, the pilot valve retainer 68 can be an o-ring that will be damaged over time. Due to the valve body 45 that can be selectively removed from the pump 10 and the pilot valve assembly 61 that can be selectively removed from the valve body 45, the pilot valve retainer 68 can be replaced without destroying other components other than the valve body 45 of the pump 10. In addition, due to this optional detachability, the operator can quickly replace and / or adjust the valve body 45 and its features. Therefore, the loss of production time due to maintenance of the pump 10 is minimized.

[0043] In addition, in some embodiments, the main fluid valve assembly 89 further includes an upper valve body cover 39 and a lower valve body cover 59 for retaining the main fluid valve sleeve 92 and the main fluid valve core 90 in the valve body 45. In some embodiments, a sensor is placed in the main fluid valve assembly 89 to detect the performance of the pump 10. For example, in some cases, an air pressure sensor allows the operator of the pump 10 to know when the main fluid valve assembly needs to be serviced. Due to the optional removability of the main valve assembly, the operator can easily access the upper valve body cover 39 and the lower valve body cover 59 to place sensors on the upper valve body cover 39, 59, so as to monitor the performance of the pump when necessary.

[0044] Additional references Figure 6 and Figure 7, the pilot valve assembly 61 may include a pilot valve core 64 disposed in a pilot valve sleeve 66. The main fluid valve assembly 89 may be disposed in the main fluid valve hole 47. The main fluid valve assembly 89 may include a main fluid valve core 90 disposed in a main fluid valve sleeve 92. Both the main fluid valve core 90 and the pilot valve core 64 can be accessed at the valve body 45; this reduces the number of parts that need to be removed to access the main fluid valve core 90 and the pilot valve core 64, which in turn reduces damage to the pump, reduces pump downtime for maintenance, and improves the performance and life of the entire pump. As will be described more fully herein, the pilot valve assembly 61 may at least partially allow control of the movement of the main fluid valve assembly 89 between a first main valve position and a second main valve position, thereby allowing compressed air to flow into the first diaphragm chamber 30 or the second diaphragm chamber 40.

[0045] Additional references Figure 8 , the muffler assembly 65 can be mounted on the removable plate 91 of the valve body housing 44. In some embodiments, the muffler assembly 65 includes a side wall sound absorbing panel 99 and a bottom sound absorbing panel 101. The side wall sound absorbing panel 99 and the bottom sound absorbing panel 101 are configured to absorb sound to reduce the noise generated by the pump 10. Therefore, the muffler assembly 65 reduces the noise generated by the pump 10. The muffler assembly 65 includes a cover 103 that closes the muffler feature to the removable plate 91. The cover 103 of the muffler assembly 65 protects the muffler assembly 65 from damage by fluid and other debris disposed above the muffler assembly 65.

[0046] Additional references Fig. 9 In some embodiments, the main fluid valve sleeve 92 includes five rows of openings, including a first row 92a, a second row 92b, a third row 92c, a fourth row 92d, and a fifth row 92e. Figure 4 and Fig. 9 As shown, the first row 92a is arranged directly behind the second compressed air supply 100; the second row 92b is arranged directly behind the second chamber port 104, the third row 92c is arranged directly behind the muffler exhaust port 62, the fourth row 92d is arranged directly behind the first chamber port 102, and the fifth row 92e is arranged directly behind the first compressed air supply 98.

[0047] also, Fig. 10A Corresponds to Figure 3A The section line BB', Fig. 10B Corresponds to Figure 3A The cutting line CC'. Fig. 10A As shown, in some embodiments, the pilot valve sleeve 66 is disposed behind the main fluid valve sleeve 92, but includes an opening that is fluidly connected to at least the third row 92c of the main fluid valve sleeve 92, so that the pilot valve sleeve 66 is fluidly connected to the muffler exhaust port 62 through the main fluid valve sleeve 92. In some embodiments, as Fig. 10B As shown, the first compressed air supply 98 is fluidly connected to the fifth row 92e of the main fluid valve sleeve 92. Fig. 10A and Fig. 10B An example of a fluid connection between the main fluid valve sleeve 92 and the ports (e.g., 62, 98, etc.) is shown, which allows the ports to be located on the same side of the valve body signal surface 48 for easier access to the ports. Thus, in some embodiments, the ports on the valve body signal surface 48 can be accessed from the pump 10 by simply removing the removable plate 91 and the front gasket 93 from the valve body housing 44.

[0048] Fig.11 Some embodiments of side views of some embodiments of the first diaphragm chamber housing 14 and the second diaphragm chamber housing 16, including the first diaphragm 24 and the third diaphragm 34, are shown. Fig.12 Corresponds to Fig.11 , but without the first diaphragm 24 and the second diaphragm 34. Therefore, the first diaphragm chamber 30 and the second diaphragm chamber 40 are in Fig.12 Exposed in Fig.11 and 12 As shown, in some embodiments, each of the first diaphragm chamber housing 14 and the second diaphragm chamber housing 16 can include a diaphragm chamber outer edge 136. The diaphragm chamber outer edge 136 can include a plurality of stabilizing feet 138. The stabilizing feet 138 can be radially spaced equidistantly around the outer edges 136 of the diaphragm chamber housings 14, 16. The stabilizing feet 138 can protrude from the outer edges 136 of the diaphragm chamber housings 14, 16 to prevent the first diaphragm chamber housing 14 and the second diaphragm chamber housing 16 from moving or rolling during maintenance or disassembly of the pump 10.

[0049] Each protrusion defining a stabilizing foot 138 may be comprised of at least two flat surfaces 140. The flat surfaces 140 may extend beyond the outer edge 136 of the first and second diaphragm chamber housings 14, 16 such that two flat surfaces 140 from two adjacent stabilizing feet 138 provide two contact points with a surface on which the pump 10 may rest. Fig.11 1, planar surfaces 140A and 140B extend beyond outer edge 136 and provide two contact points and a substantially planar surface for the pump 10 to rest on. Stabilizing feet 138 can be sufficiently spaced apart to prevent the pump 10 from rolling or tipping over when resting on stabilizing feet 138. In one embodiment, planar surfaces 140 can be substantially perpendicular to each other. It should be appreciated that the surfaces can have some other angular relationship to each other depending on the number of stabilizing feet 138 and the spacing of stabilizing feet 138 around outer edge 136 of the pump housing.

[0050] In addition, refer to Figure 3AIn some embodiments, the valve body 45 has a protruding foot 53 so that the valve body 45 can also be placed on a flat surface (e.g., a table, a workbench, etc.) when the valve body 45 is removed from the pump 10 for maintenance. It should be understood that the protruding foot 53 on the valve body 45 can have the same Figure 3A Different structures and / or locations of (one or more) on the valve body 45 are shown.

[0051] Fig.13 Cross-sectional views of some embodiments of the central portion 18 of the pump 10 are shown. Fig.13 The cross-section diagram in Fig.12 The section line DD'. Fig.13 As shown, the pilot valve sleeve 66 is disposed behind the first inlet port 70 , the second pilot inlet port 72 , and the first main passage 76 , the second main passage 76 of the valve body 45 .

[0052] Also go to Fig.14A , 14B and 14C , showing the position and movement of the pilot spool 64 . Fig.14A Some embodiments of the central section 18 of the pump 10 are shown in cross-sectional view and may correspond to Fig.12 The pilot valve core 64 can be coupled to the first actuator pin 82 and the second actuator pin 86. The pilot valve core 64 can be in the first pilot position FP1 (eg, Fig. 14C ) and a second pilot position FP2 (e.g., Fig. 14B )

[0053] The first actuator pin 82 may be positioned such that the first actuator pin 84 is located within the valve body housing 44; the first actuator pin 82 extends through the valve body housing 44 and the first diaphragm chamber housing 14; the first actuator pin end 82e is located within the first diaphragm chamber 30. The second actuator pin 86 may be positioned such that the second actuator 87 is located within the valve body housing 44; the second actuator pin 86 extends through the valve body housing 44 and the second diaphragm chamber housing 16; the second actuator pin end 86e is located within the second diaphragm chamber 40. The first actuator pin 82 and the second actuator pin 86 may be positioned such that the central axis of the pins is aligned with the central axis of the pilot valve core 64.

[0054] When the pump 10 is running, the first diaphragm plate 26 can contact the first actuator pin end 82e, moving the pin so that the first actuator pin 84 contacts the pilot valve core 64, thereby moving the pilot valve core 64 to the second pilot position FP2, as shown in FIG. Fig. 14B Optionally, when the pump 10 is in operation, the second diaphragm plate 36 may contact the second actuator pin end 88, moving the pin so that the first actuator pin 87 contacts the pilot valve core 64, thereby moving the pilot valve core 64 to the position shown in FIG. Fig. 14C A first pilot position FP1 is shown.

[0055] The length of the pilot spool 64 can be configured such that the first actuator pin 84 and the second actuator pin 87, and therefore the first actuator pin 82 and the second actuator pin 86, cannot enter the pilot valve sleeve 66 when the pump 10 is operating. The length of the pilot spool 64 can prevent the actuator pins from entering the pilot valve sleeve 66 when the first diaphragm assembly 22 and the second diaphragm assembly 32 move and interact with the first actuator pin 82 and the second actuator pin 86. The first actuator pin 84 and the second actuator pin 87 can move within the valve body housing 44 to facilitate operation of the pump 10. However, when the pilot spool 64 is in the first pilot position FP1, in the second pilot position FP2, or between the first pilot position FP1 and the second pilot position FP2, the length of the pilot spool 64 can completely prevent the actuator pins 84, 86 from entering the pilot valve sleeve 66. Preventing the first and second actuator pins 82, 86 from being inserted into the pilot valve sleeve allows the valve body 45 to be removed from the valve body housing 44 without having to adjust the position of one of the actuator pins 84, 87. Thus, adjustment of the actuator pins 84, 87 is eliminated, increasing the efficiency and convenience of removing the valve body housing 44 for maintenance.

[0056] In some embodiments, the movement of the pilot valve core 64 may be caused by the first actuator pin 82 in contact with the first diaphragm plate 26 or the second actuator pin 86 in contact with the second diaphragm plate 36. The first pilot inlet port 70 and the second pilot inlet port 72 may deliver compressed air to the first main channel 74 and the second main channel 76. The first pilot inlet port 70 and the second pilot inlet port 72 are connected to each other to increase the flow of compressed air into the first main channel 74 and the second main channel 76. Therefore, the first pilot inlet port 70 and the second pilot inlet port 72 are connected to the main air source to supply compressed air to the pilot valve core 64 through the first main channel 74 and the second main channel 76.

[0057] like Figure 6 as well as Fig.14A , 14BAs shown in FIGS. 14C and 14C, the pilot valve core 64 may include a first pilot passage 78 and a second pilot passage 80, so that when the pilot valve core 64 moves to the first pilot position FP1, the first pilot passage 78 delivers compressed air from the first pilot inlet port 70 and the second pilot inlet port 72 to the first main passage 74. In addition, in the first pilot position FP1, the pilot valve core 64 may be positioned to prevent the compressed air from flowing between the first pilot inlet port 70 and the second pilot inlet port 72, the second pilot passage 80, and the second main passage 76. When the pilot valve core 64 moves to the second pilot position FP2, the second pilot passage 80 delivers compressed air from the first pilot inlet port 70 and the second pilot inlet port 72 to the second main passage 76. In addition, in the second pilot position FP2, the pilot valve core 64 may be positioned to prevent the compressed air from communicating with the first pilot passage 78 and the first main passage 74.

[0058] Fig.15A and 15B Cross-sectional views of some embodiments of the central portion 18 of the pump 10 are shown, including the primary fluid valve core 90 described herein in various positions. Fig.15A and Fig. 15B The cross-sectional view can correspond to Figure 5C The cutting line FF'.

[0059] Reference Figure 3A , Figure 4 , Figure 6 , Fig.15A and 15B In some embodiments, the delivery of compressed air from the first signal main channel 74 or the second signal main channel 76 to the first pilot signal port 51 or the second pilot signal port 52 can cause the main fluid valve core 90 to move between the first main position MP1 and the second main position MP2, respectively. In one embodiment, the communication of compressed air from the first main channel 74 to the first pilot signal port 51 can cause the main fluid valve core 90 to move from the first main position MP1 to the second main position MP2, as shown in FIG. Fig.15A As shown. In the first main position MP1, the first main passage 94 allows fluid communication between the first main passage 74 and the first diaphragm chamber 30 to allow fluid to flow into the chamber. In the first main position MP1, the second main passage 96 allows fluid communication from the second diaphragm chamber 40 to the muffler outlet port 62. In the second main position MP2, the first main passage 94 allows fluid communication between the first diaphragm chamber 30 and the muffler outlet port 62. In the second main position MP2, the second main passage 96 allows fluid communication between the second main passage 76 and the second diaphragm chamber 40.

[0060] like Figure 6 Shown and referenced Figure 1C, the main fluid valve core 90 may include a first main passage 94 and a second main passage 96. Movement of the main fluid valve core 90 to the second main position MP2 may cause the second main passage 96 to be positioned to allow compressed air to flow from the second compressed air supply 100, through the second chamber port 104, and into the second diaphragm chamber 40, thereby causing the second diaphragm chamber 40 to be filled with compressed air.

[0061] Additionally, the first main passage 94 of the main fluid spool 90 can be positioned to allow compressed air to pass through the first chamber port 102, out of the first diaphragm chamber 30, and then out through the muffler exhaust port 62. The communication of compressed air with the second pilot signal port 52 can cause the main fluid spool 90 to move from the second main position MP2 to the position shown in FIG. Fig. 15B The movement of the main fluid spool 90 to the first main position MP1 may cause the first main passage 94 to be positioned to allow compressed air to flow from the first compressed air supply 98 through the first chamber port 102 and into the first diaphragm chamber 30, thereby causing the first diaphragm chamber 30 to be filled with compressed air. In addition, the second main passage 96 of the main fluid spool 90 may be positioned to allow compressed air to be exhausted from the second diaphragm chamber 40 via the muffler exhaust port 62.

[0062] The connecting rod 42 can at least partially allow the first diaphragm assembly 22 and the second diaphragm assembly 32 to reciprocate together between the first end of the stroke position EOS1 and the second end of the stroke position EOS2. The first end of the stroke position EOS1 and the second end of the stroke position EOS2 can represent hard stops or physical limit positions of the first diaphragm assembly 22 and the second diaphragm assembly 32, as limited by the mechanical structure of the pump. Next, each diaphragm assembly 22, 32 within the corresponding first diaphragm chamber housing 14 and the second diaphragm chamber housing 16 can have a first diaphragm position DP1, respectively. L DP1 R and second diaphragm position DP2 L DP2 R . First diaphragm position DP1 L DP1 R and second diaphragm position DP2 L DP2 R It may correspond to a predetermined position and / or a detected position of the first diaphragm assembly 22 and the second diaphragm assembly 32 that is reached before the respective end of travel position EOS1 , EOS2 .

[0063] In one embodiment, the first diaphragm position DP1L, DP1R may include a position where compressed air has been substantially exhausted from the first and second diaphragm chambers 30, 40, and pumped fluid has been drawn or otherwise delivered into the pump chambers 28, 38. L DP1 R, the first diaphragm plate 26 and the second diaphragm plate 36 can contact the ends of the first actuator pin 82 and the second actuator pin 86, thereby starting the movement of the pilot valve core 64. Second diaphragm position DP2 L DP2 R This may include a position where the first diaphragm chamber 30 and the second diaphragm chamber 40 are substantially filled with compressed air and the pumped fluid has been substantially expelled from the first pump chamber 28 and the second pump chamber 38. L DP2 R , the first diaphragm plate 26 and the second diaphragm plate 36 may be positioned completely out of contact with the first actuator pin 82 and the second actuator pin 86 .

[0064] Generally, the pump 10 can be operated by continuously switching between a first pump state PS1 and a second pump state PS2. The first pump state PS1 can include: the pilot valve core 64 (eg, Fig. 14C ), the main fluid valve core 90 located in the second main position MP2 (as shown in Fig.15A As shown in FIG. 1 ), and the first diaphragm chamber 30 and the second diaphragm chamber 40 at the first end EOS1 of the stroke position. The second pump state PS2 may include: the pilot valve core 64 (as shown in FIG. 1 ) at the second pilot position FP2 Fig. 14B ), the main fluid valve core 90 located at the first main position MP1 (as shown in Fig. 15B As shown), and the first diaphragm assembly 22 and the second diaphragm assembly 32 are located at the second end EOS2 of the stroke position.

[0065] When the pilot valve core 64 is in the first pilot position FP1 (eg Fig. 14C ), compressed air is communicated with the first pilot signal port 51 and the main fluid valve assembly 89 through the second main passage 76. In one embodiment, the main fluid valve core 90 may initially be in the first main position MP1, and the initial communication of compressed air to the first pilot signal port 51 may cause the main fluid valve core 90 to move from the first main position MP1 to the second main position MP2. The second main passage 76 may be in fluid communication with the second compressed air supply 100. In the second main position MP2, as described above, the second main passage 96 of the main fluid valve core 90 may allow compressed air to flow through the pilot valve assembly 63 and enter the second diaphragm chamber 40. In addition, the main fluid valve core 90 may prevent or block compressed air from communicating with the first diaphragm chamber 30 through the pilot valve assembly 61. Conversely, as described above, the main fluid valve core 90 may allow compressed air to be discharged or exhausted from the first diaphragm chamber 30 through the muffler exhaust port 62.

[0066] The compressed air may continue to flow into the second diaphragm chamber 40 and out of the first diaphragm chamber 30. The continued flow and discharge of compressed air into the second diaphragm chamber 40 and out of the first diaphragm chamber 30 may cause the second diaphragm assembly 32 to move away from the first diaphragm position DP1 and toward the second diaphragm position DP2, and may cause the first diaphragm assembly 22 to move away from the second diaphragm state DP2 and toward the first diaphragm position DP1. When the second diaphragm assembly 32 reaches the second end of the stroke position EOS2, the pump 10 may include a second pump state PS2. The first diaphragm plate 26 may contact the first actuator pin 82, causing the pilot valve core 64 to move to the second pilot position FP2, wherein the compressed air is connected to the second pilot signal port 52 of the main fluid valve assembly 89 through the valve body 45 and the pilot valve assembly 63.

[0067] Continued communication of compressed air with the second pilot signal port 52 may cause the main fluid spool 90 to shift or move from the second main position MP2 to the first main position MP1. In the first main position MP1, the main fluid spool 90 of the main fluid valve assembly 89 may thereby block or prevent the communication of compressed air through the second compressed air supply 100, and may position the first compressed air supply 98 to allow compressed air to communicate from the first main passage 74 to the first diaphragm chamber 30. When the first diaphragm chamber 30 is filled with compressed air, the second diaphragm chamber 40 may be exhausted through the muffler exhaust port 62 of the main fluid valve assembly 89.

[0068] Additional references Fig.13 , 15A 15B, in order to provide all ports on the valve body signal surface 48, the valve body 45 may include a plurality of independent fluid communication channels to facilitate the movement of air through the valve body, thereby allowing the pump 10 to operate. In other words, the independent fluid communication channels are configured so that the signal ports are arranged on the same planar valve body signal surface 48 for easy access by the operator, which improves manufacturing efficiency. For example, in some embodiments, the valve body 45 may include a channel for fluid communication between the pilot inlet ports 70, 72 and the pilot valve assembly 63. The valve body 45 may include a first main channel 74 and a second main channel 76 for fluid communication between the pilot valve assembly 63 and the main fluid valve assembly 89 to fill the first diaphragm chamber 30 and the second diaphragm chamber 40. The valve body 45 may include a first main channel 74 and a second main channel 76 for fluid communication between the pilot valve assembly 63, the first pilot signal port 51 and the second pilot signal port 52, and the main fluid valve assembly 89 to move the main fluid valve assembly between the first main position MP1 and the second main position MP2. The main fluid spool 90 may include first and second main passages 94 , 96 that may allow fluid communication between the first and second main passages 74 , 76 , the first and second diaphragm chambers 30 , 40 , and the exhaust ports 102 , 104 , 62 on the valve body signal surface 48 .

[0069] See also Fig.16 and Figure 2 It is understood that the present disclosure is not limited to Figure 2 The pump 10 shown is of overall design. Figure 2 In the embodiment, fluid can enter the pump 10 through the main inlet 3 and leave the pump 10 through the main outlet 2. In some embodiments, the main inlet 3 and the main outlet 2 face away from the opening of the valve body housing 44 and approach the valve body 45 at the opening. Therefore, when the operator approaches the valve body 45, fluid leaking from the main inlet 3 and the main outlet 2 is less likely to contaminate the operator, the valve body housing 44 and the valve body 45. In some other embodiments, such as Fig.16 As shown, the pump 10 may have an alternative design. Fig.16 In the embodiment, the pump 10 has a main outlet 2 and a main inlet 3 arranged above and below the valve body housing 44 , while the main outlet 2 and the main inlet 3 still face away from the valve body housing 44 .

[0070] Embodiments have been described above. It will be apparent to those skilled in the art that the above methods and apparatus may be combined with changes and modifications without departing from the overall scope of the present invention. It is intended to include all such modifications and changes as long as they are within the scope of the appended claims or their equivalents.

[0071] The word "exemplary" means as an example, instance or illustration in this article. Any aspect or design described as "exemplary" in this article is not necessarily to be interpreted as superior to other aspects or designs. Rather, the use of the word "exemplary" is intended to present the concept in a concrete way. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from the context, "X uses A or B" is intended to mean any natural inclusive arrangement. That is, if X uses A, X uses B, or X uses A and B at the same time, in any of the above cases, "X uses A or B" is established. In addition, at least one of A and B and / or the like generally means A or B or both A and B. In addition, the articles "one" and "an" used in this application and the appended claims can generally be interpreted as meaning "one or more", unless otherwise specified or clearly pointed to the singular form from the context.

[0072] Although the subject matter has been described in language specific to structural features and / or methodological acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Instead, the specific features and acts described above are disclosed as example forms of implementing the claims. Of course, those skilled in the art will recognize that many modifications may be made to this configuration without departing from the scope or spirit of the claimed subject matter.

[0073] In addition, although the present disclosure has been shown and described with respect to one or more embodiments, those skilled in the art will make equivalent changes and modifications based on the reading and understanding of this specification and the drawings. The present disclosure includes all such modifications and changes and is limited only by the scope of the appended claims. In particular, with respect to the various functions performed by the above-mentioned components (e.g., elements, resources, etc.), unless otherwise specified, the terms used to describe these components are intended to correspond to any component that performs the specified function of the component (e.g., functionally equivalent), even if the structure is not identical to the disclosed structure that performs the function in the exemplary implementation of the present disclosure shown herein.

[0074] Additionally, while a particular feature of the invention may be disclosed with respect to only “one of several embodiments,” that feature may be combined with one or more other features of other embodiments, as may be desirable and advantageous for any given or particular application. Furthermore, to the extent that the terms “includes,” “has,” “contains,” “comprises,” or variations thereof are used in the detailed description or claims, these terms are intended to be inclusive in a manner similar to the term “comprising.”

Claims

1. A pump comprising: a first diaphragm chamber housing and a second diaphragm chamber housing, each including a diaphragm defining a diaphragm chamber; a valve body housing disposed between the diaphragm chamber housings and configured to be in fluid communication with each diaphragm chamber; a valve body disposed within the valve body housing and configured to be selectively removable from the valve body housing, the valve body comprising at least one inlet port, at least one exhaust port, a pilot valve bore, a main fluid valve bore, and a passage for fluid communication between the pilot valve bore, the main fluid valve bore, the diaphragm chamber, the inlet port, and the exhaust port; a pilot valve assembly disposed in the pilot valve hole, the pilot valve assembly comprising a pilot valve sleeve and a pilot valve core, the pilot valve assembly being configured to be selectively removable from the valve body; and A main fluid valve assembly is disposed in the main fluid valve hole, the main fluid valve assembly comprises a main fluid valve sleeve and a main fluid valve core, and the main fluid valve assembly is configured to be selectively removable from the valve body.

2. The pump of claim 1 further comprising a first actuator pin and a second actuator pin, each pin being disposed between the valve body housing and the diaphragm chamber housing such that each actuator pin has a first end engaged with the diaphragm and a second end engaged with the pilot valve core; in, The pilot valve spool includes a length, wherein the length of the pilot valve spool prevents the second ends of the first actuator pin and the second actuator pin from entering the pilot valve sleeve.

3. The pump of claim 1, wherein each diaphragm chamber housing further comprises an outer edge, the outer edge comprising a plurality of stabilizing feet.

4. The pump of claim 1, wherein the pilot valve assembly and the main fluid valve assembly are symmetrical.

5. A pump comprising: a pair of diaphragm chamber housings, each diaphragm chamber housing including a diaphragm defining a diaphragm chamber; a valve body housing disposed between the diaphragm chamber housings and configured to be in fluid communication with each diaphragm chamber; and a valve body disposed within the valve body housing, the valve body including a signal surface, a pilot valve assembly, a main fluid valve assembly, at least one pilot inlet port, at least one pilot signal port, at least one diaphragm chamber inlet port, at least one chamber exhaust port, and an exhaust port leading to a muffler; Wherein, the pilot valve assembly further comprises a first pilot valve position and a second pilot valve position, and the main fluid valve assembly further comprises a first main fluid valve position and a second main fluid valve position; wherein the pilot valve assembly is in fluid communication with the main fluid valve assembly, and the main fluid valve assembly is in fluid communication with the diaphragm chambers, wherein the position of the pilot valve assembly is configured to control the position of the main fluid valve assembly, and the position of the main fluid valve assembly is configured to control fluid flow into one diaphragm chamber and fluid flow out of an opposite diaphragm chamber; and Wherein, the pilot signal port, the diaphragm chamber inlet port, the chamber exhaust port and the exhaust port leading to the muffler are all accessible on the signal surface of the valve body.

6. The pump according to claim 5, wherein The valve body is configured to be selectively removable from the valve body housing.

7. The pump of claim 5 further comprising a passage for fluid communication between the pilot inlet port, the pilot signal port, the diaphragm chamber inlet port, the chamber exhaust port, and an exhaust port to the muffler, wherein: The passages are configured such that all ports are accessible at the signal surface of the valve body.

8. The pump of claim 5, wherein the signal surface is planar.

9. A pump comprising: Entrance; exit; a first diaphragm chamber housing and a second diaphragm chamber housing, each including a diaphragm defining a diaphragm chamber; a valve body housing, arranged between the first diaphragm chamber housing and the second diaphragm chamber housing; as well as A valve body is disposed within the valve body housing, is in fluid communication with the diaphragm chambers of the first diaphragm chamber housing and the second diaphragm chamber housing, and includes a pilot signal port, a diaphragm chamber inlet port, and a chamber exhaust port, all of which are accessible at a signal surface of the valve body.

10. The pump according to claim 9, wherein The valve body is selectively removable from the valve body housing.

11. The pump according to claim 9, wherein Each diaphragm chamber housing also includes an outer edge and a plurality of stabilizing feet, wherein the plurality of stabilizing feet protrude from the outer edge of the diaphragm chamber housing, and wherein each diaphragm chamber housing includes at least two stabilizing feet having a substantially flat surface, the surfaces being configured to provide two points of contact with an underlying surface and to stabilize each diaphragm chamber housing when each diaphragm chamber housing is on the underlying surface.

12. The pump according to claim 9, wherein The signal surface of the valve body is located on a single side of the valve body.

13. The pump according to claim 9, wherein The valve body comprises a polymer.

14. The pump according to claim 9, wherein The valve body is electrically insulated.

15. The pump according to claim 9, wherein The valve body includes protruding feet configured to stabilize the valve body on a surface.

16. The pump of claim 9, further comprising a removable plate removably coupled to the valve body housing, wherein the removable plate and the valve body housing enclose the valve body.

17. The pump of claim 16, further comprising a muffler assembly coupled to the removable plate, wherein the muffler assembly includes a cover enclosing a muffler feature to the removable plate.

18. The pump of claim 9, further comprising: a pilot valve assembly disposed in the pilot valve hole of the valve body, the pilot valve assembly comprising a pilot valve sleeve and a pilot valve core, the pilot valve assembly being configured to be selectively removable from the valve body; and A main fluid valve assembly is arranged in the main fluid valve hole of the valve body. The main fluid valve assembly includes a main fluid valve sleeve and a main fluid valve core. The main fluid valve assembly is configured to be selectively removed from the valve body.

19. The pump according to claim 18, wherein The valve body also includes a pilot inlet port fluidly coupled to the pilot valve assembly, wherein the pilot inlet port is disposed on a rear side of the valve body, and wherein the signal surface is located on a front side of the valve body.

20. The pump of claim 18, wherein: The main fluid valve assembly is removably retained within the valve body by a valve body cover.

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