PVM plunger pump electromagnetic loading valve block

Abstract

The utility model provides a PVM plunger pump electromagnetic loading valve block which comprises a valve block body, the valve block body is provided with a reversing valve port T, a reversing valve port B, a reversing valve port P, a switching port J, a controller control oil channel K, a controller pressure oil channel P, a controller oil drainage channel L, a plug process hole and a pressure measuring hole, and the switching port J is used for connecting the reversing valve port B with a controller feedback port. The plug process hole is communicated with the reversing valve port P, the controller pressure oil channel P and the controller oil drainage channel L. The pressure measuring hole is communicated with the switching port J and the reversing valve port B, and the reversing valve port T is communicated with the controller oil drainage channel L. The electromagnetic loading and unloading device can be directly installed on a pump body of the PVM plunger pump and establish an oil way working relation with a variable controller and an electromagnetic reversing valve, an oil way of a load feedback control loop is effectively simplified, the electromagnetic loading and unloading functions of the PVM plunger pump are achieved, meanwhile, the structure of hydraulic equipment is more compact, and the use reliability is good.

Description

Technical Field

[0001] The utility model belongs to the field of plunger pumps, relates to electromagnetic control of variable plunger pumps, and in particular to an electromagnetic loading valve block of a PVM plunger pump. Background Art

[0002] The variable displacement piston pump is a hydraulic device different from the fixed displacement piston pump. The variable displacement piston pump can adjust the pump output flow rate according to the load requirement speed, and adjust the pump output pressure according to the load size requirement. The PVM piston pump is a type of variable displacement piston pump.

[0003] At present, the variable controller of the general PVM variable piston pump has load sensing control, and a pressure feedback loop must be set up when in use for normal use. When the PVM variable piston pump needs to achieve simple control of loading and unloading, the loop appears to be too complicated. In addition, the space installation limitation of the equipment makes the layout of the variable controller feedback oil circuit more complicated. Utility Model Content

[0004] In view of the above-mentioned problems existing in the operation and unloading of the PVM variable piston pump, the utility model proposes a PVM plunger pump electromagnetic loading valve block which has a reasonable design, is easy to install, has a compact structure, has good reliability in use and is conducive to improving the applicability of the PVM plunger pump.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the electromagnetic loading valve block of the PVM plunger pump provided by the utility model includes a valve block body, the valve block body is used to be installed between the controller and the pump body of the PVM plunger pump, the top surface of the valve block body is provided with a reversing valve T port, a reversing valve B port and a reversing valve P port for connecting the electromagnetic reversing valve, the bottom surface of the valve block body is provided with a switching port J, the switching port J is used to connect the reversing valve B port to the controller feedback port, the left and right sides of the valve block body are through-set with a controller control oil channel K, a controller pressure oil channel P and a controller oil leakage channel L, the front and back of the valve block body are respectively provided with a screw plugging process hole and a pressure measuring hole, the screw plugging process hole is connected with the reversing valve P port, the controller pressure oil channel P, and the controller oil leakage channel L, the pressure measuring hole is connected with the switching port J and the reversing valve B port, and the reversing valve T port is connected with the controller oil leakage channel L.

[0006] Preferably, the valve block body is provided with a plurality of controller mounting bolt holes penetrating the left and right sides thereof.

[0007] Preferably, the number of the controller mounting bolt holes is 4 and they are distributed in a 2x2 pattern.

[0008] Preferably, a plurality of reversing valve screw holes and a positioning pin hole are provided on the top surface of the valve block body.

[0009] Preferably, the number of the reversing valve screw holes is 4 and they are symmetrically distributed on both sides of the reversing valve B port and the reversing valve P port.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The electromagnetic loading valve block of the PVM plunger pump provided by the utility model can be directly installed on the pump body of the PVM plunger pump and establish an oil circuit working relationship with the variable controller and the electromagnetic reversing valve, effectively simplifying the oil circuit of the load feedback control loop, realizing the electromagnetic loading and unloading functions of the PVM plunger pump, and making the structure of the hydraulic equipment more compact. The device has a reasonable design, convenient installation, compact structure, good reliability, and is conducive to improving the applicability of the PVM plunger pump, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 An axonometric view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0014] Figure 2 Axonometric drawing of the electromagnetic loading valve block of the PVM plunger pump, the PVM plunger pump, the controller and the electromagnetic reversing valve;

[0015] Figure 3 It is a schematic diagram of the working oil circuit of the electromagnetic loading valve block of the PVM plunger pump, the PVM plunger pump, the controller and the electromagnetic reversing valve;

[0016] Figure 4 This is the working rear view of the PVM plunger pump electromagnetic loading valve block, PVM plunger pump, controller and electromagnetic reversing valve;

[0017] Figure 5 A front view of a PVM plunger pump electromagnetic loading valve block provided in an embodiment;

[0018] Figure 6 A left side view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0019] Figure 7 A right side view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0020] Figure 8 A bottom view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0021] Fig. 9 A top view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0022] Fig.10 A back view of the electromagnetic loading valve block of the PVM plunger pump provided in the embodiment;

[0023] In the above figures, 1. PVM plunger pump; 2. controller; 3. solenoid reversing valve; 4. valve block body; 41. reversing valve T port; 42. reversing valve B port; 43. reversing valve P port; 44. adapter J port; 45. controller control oil channel K; 46. controller pressure oil channel P; 47. controller oil drain channel L; 48. screw plugging process hole; 49. pressure measuring hole; 410. controller mounting bolt hole; 411. reversing valve screw hole; 412. positioning pin hole; 5. pressure measuring joint. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0026] Examples, such as Figures 1 to 10 As shown, the electromagnetic loading valve block of the PVM plunger pump provided by the utility model comprises a valve block body 4, the valve block body 4 is used to be installed between the controller 2 and the pump body of the PVM plunger pump, the top surface of the valve block body 4 is provided with a reversing valve T port 41, a reversing valve B port 42 and a reversing valve P port 43 for connecting the electromagnetic reversing valve 3, the bottom surface of the valve block body 4 is provided with a switching J port 44, the switching J port 44 is used to connect the reversing valve B port to the controller feedback port, and the left and right sides of the valve block body 4 are through-set with controller control ports. The oil control channel K45, the controller pressure oil channel P46 and the controller oil leakage channel L47, the front and rear of the valve block body 4 are respectively provided with a screw plugging process hole 48 and a pressure measuring hole 49, the screw plugging process hole 48 is connected with the reversing valve P port 43, the controller pressure oil channel P46, and the controller oil leakage channel L47, the pressure measuring hole 49 is connected with the adapter J port 44 and the reversing valve B port 42, a pressure measuring connector 5 is provided at the end of the pressure measuring hole 49, and the reversing valve T port 41 is connected with the controller oil leakage channel L47.

[0027] Specifically, without changing the controller 2 channel of the PVM plunger pump 1, the pressure oil of the controller pressure oil channel P46 of the PVM plunger pump is connected to the reversing valve P port 43, and the reversing valve T port 41 is connected to the controller oil drain channel L47; the reversing valve B port 42 is connected to the controller load sensing port (LS port), and the connection method adopts a sleeve pipe joint to connect in the form of an external steel pipe. The unloading and loading of the PVM plunger pump 1 are controlled by a two-position four-way electromagnetic reversing valve with a diameter of NG6. When the electromagnetic reversing valve 3 is de-energized, B is connected to T, that is, the LS port is depressurized, and the PVM plunger pump 1 is unloaded; when the electromagnetic reversing valve 3 is energized, B is connected to P, that is, the LS port is pressurized, and the PVM plunger pump 1 is loaded. The device can be directly installed on the pump body of the PVM plunger pump 1 and establish an oil circuit working relationship with the variable controller 2 and the electromagnetic reversing valve 3, effectively simplifying the oil circuit of the load feedback control loop, while realizing the electromagnetic loading and unloading functions of the PVM plunger pump 1, it also makes the structure of the hydraulic equipment more compact, and has reasonable design, convenient installation, compact structure, good reliability in use, and is conducive to improving the applicability of the PVM plunger pump 1.

[0028] In order to improve the connection performance between the valve block body 4 and the controller 2 of the PVM plunger pump 1, the valve block body 4 provided by the utility model is provided with a plurality of controller mounting bolt holes 410 penetrating the left and right sides thereof, and the controller mounting bolt holes 410 correspond to the bolt holes on the controller 2.

[0029] Furthermore, the number of the controller mounting bolt holes 410 is 4 and they are distributed in a 2x2 pattern, and they are symmetrically distributed about the controller control oil channel K45 and the controller pressure oil channel P46, and O-rings are provided at the ends of the controller mounting bolt holes 410. After the bolts are connected, the docking quality is good on the docking surface between the valve block body 4 and the controller 2, and the force uniformity on both sides of the controller control oil channel K45 and the controller pressure oil channel P46 is good, which can improve the sealing performance of the valve block body 4 and the controller oil circuit to a certain extent.

[0030] In order to improve the connection reliability between the valve block body 4 and the electromagnetic reversing valve 3, a plurality of reversing valve screw holes 411 and a positioning pin hole 412 are provided on the top surface of the valve block body 4. The positioning pin can play a role in rapid positioning, and can ensure the docking accuracy between the valve block body 4 and the electromagnetic reversing valve 3. Furthermore, the number of the reversing valve screw holes 411 is 4 and they are symmetrically distributed on both sides of the reversing valve B port 42 and the reversing valve P port 43, so that the reversing valve T port 41, the reversing valve B port 42 and the reversing valve P have good hand uniformity and good centering effect, which is conducive to ensuring the connectivity of the oil circuit inside the device.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A PVM plunger pump electromagnetic loading valve block, comprising a valve block body, characterized in that: The valve block body is used to be installed between the controller and the pump body of the PVM plunger pump. The top surface of the valve block body is provided with a reversing valve T port, a reversing valve B port and a reversing valve P port for connecting the electromagnetic reversing valve. The bottom surface of the valve block body is provided with a switching port J. The switching port J is used to connect the reversing valve B port to the controller feedback port. The left and right sides of the valve block body are through-set with a controller control oil channel K, a controller pressure oil channel P and a controller oil leakage channel L. The front and back of the valve block body are respectively provided with a screw plugging process hole and a pressure measuring hole. The screw plugging process hole is connected with the reversing valve P port, the controller pressure oil channel P and the controller oil leakage channel L. The pressure measuring hole is connected with the switching port J and the reversing valve B port. The reversing valve T port is connected with the controller oil leakage channel L.

2. The electromagnetic loading valve block of the PVM plunger pump according to claim 1 is characterized in that: The valve block body is provided with a plurality of controller mounting bolt holes penetrating the left side and the right side thereof.

3. The electromagnetic loading valve block of the PVM plunger pump according to claim 2 is characterized in that: The number of the controller mounting bolt holes is 4 and they are distributed in a 2x2 pattern.

4. The electromagnetic loading valve block of the PVM plunger pump according to claim 3 is characterized in that: The top surface of the valve block body is provided with a plurality of reversing valve screw holes and a positioning pin hole.

5. The electromagnetic loading valve block of the PVM plunger pump according to claim 4, characterized in that: The number of the reversing valve screw holes is 4 and they are symmetrically distributed on both sides of the reversing valve B port and the reversing valve P port.

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