A proportional pressure regulating valve device

Abstract

The utility model discloses a proportional pressure regulating valve device, including proportional pressure regulating valve seat, two -way cartridge valve spool subassembly of installing in the valve cavity of proportional pressure regulating valve seat, set up two -way cartridge valve bonnet on proportional pressure regulating valve seat, set up the function superposition seat on two -way cartridge valve bonnet, set up solenoid reversing valve on the function superposition seat, install cartridge type pilot relief valve on the function superposition seat to and install cartridge type proportional direct -acting relief valve on the function superposition seat, the utility model discloses the stable working performance in lubricating system, and the back pressure is low when standby state, and the manufacturing cost has reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating components, and in particular to a proportional pressure regulating valve device. Background Technology

[0002] The shoe press (also known as a shoe press unit) is a key dewatering component of modern papermaking machines. It is mainly used in the press section and uses the principle of "wide pressure zone, high linear pressure, and static pressure dewatering" to remove as much moisture as possible before the paper enters the drying section, thereby reducing drying steam consumption and improving paper dryness and paper quality.

[0003] The lubrication system of the shoe press must ensure the formation of a stable oil film on the high-speed sliding pair of the shoe plate and shoe sleeve under a linear pressure of several hundred kN / m, while also providing cooling and flushing for the bearings, controllable medium-high roller oil bags, and gearbox. The pressure of the lubrication system is regulated by a pressure regulating valve, with a flow rate typically of 3900 L / min and an operating pressure less than 2 MPa, which can be adjusted arbitrarily according to the working conditions.

[0004] However, the pressure regulating valves of existing lubrication systems are insufficient to meet the requirement that the system pressure needs to be less than 0.5 MPa in standby mode, thus reducing power consumption in standby mode.

[0005] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a proportional pressure regulating valve device that reduces the back pressure in standby mode while ensuring operational stability, in order to address the shortcomings of the existing technology.

[0007] The technical problem to be solved by this utility model can be achieved by the following technical solution: A proportional pressure regulating valve device, comprising: A proportional pressure regulating valve seat has a valve cavity formed inside it. A main oil inlet and a main oil return port are provided on its outer side. The main oil inlet is connected to the bottom surface of the valve cavity, and the main oil return port is connected to the side surface of the valve cavity. A two-way cartridge valve core assembly installed in the valve chamber of the proportional pressure regulating valve seat for controlling the on / off state of the oil passage within the valve chamber; The two-way cartridge valve cover is provided on the proportional pressure regulating valve seat. The two-way cartridge valve cover has a first oil passage, a second oil passage and a third oil passage formed inside. One end of the first oil passage is connected to the main oil passage inlet of the proportional pressure regulating valve seat, and the other end is connected to one end of the second oil passage and one end of the third oil passage. The other end of the second oil passage is connected to the valve cavity of the proportional pressure regulating valve seat. A functional stack seat is provided on the valve cover of the two-way cartridge valve. A pressure regulating oil passage is formed in the functional stack seat. One end of the pressure regulating oil passage is connected to the other end of the third oil passage of the valve cover of the two-way cartridge valve. The electromagnetic directional valve installed on the functional stack seat has an oil inlet, an oil return port, and first and second working oil ports. Its oil inlet is connected to the other end of the pressure regulating oil circuit of the functional stack seat, its oil return port is connected to the main oil circuit return port of the proportional pressure regulating valve seat, its first working oil port is connected to the main oil circuit return port of the proportional pressure regulating valve seat, and its second working oil port is sealed. A cartridge-type pilot-operated relief valve is installed on the functional stack base. The cartridge-type pilot-operated relief valve has an inlet port, a return port, and a control port. Its inlet port is connected to the pressure regulating oil circuit of the functional stack base, and its return port is connected to the main oil circuit return port of the proportional pressure regulating valve seat. A cartridge-type proportional direct-acting relief valve is installed on the functional stack seat. The cartridge-type proportional direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the control oil port of the cartridge-type pilot relief valve, and its oil return port is connected to the main oil return port of the proportional pressure regulating valve seat.

[0008] In a preferred embodiment of the present invention, a first damping plug is provided in the first oil passage of the two-way cartridge valve cover.

[0009] In a preferred embodiment of the present invention, a second damping plug is provided in the second oil passage of the two-way cartridge valve cover.

[0010] In a preferred embodiment of the present invention, a third damping plug is provided in the third oil passage of the two-way cartridge valve cover.

[0011] In a preferred embodiment of the present invention, a fourth damping plug is provided in the pressure regulating oil circuit of the functional superposition seat.

[0012] In a preferred embodiment of the present invention, a direct-acting relief valve is installed on the valve cover of the two-way cartridge valve. The direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the common connection point of the first oil passage, the second oil passage and the third oil passage of the valve cover of the two-way cartridge valve, and its oil return port is connected to the main oil passage return port of the proportional pressure regulating valve seat.

[0013] In a preferred embodiment of this utility model, the pressure of the direct-acting relief valve is set to 2.5 MPa.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are: the utility model has stable working performance in the lubrication system, low back pressure in the standby state, and significantly reduced manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 This is a connection principle diagram of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] See Figure 1 and combined Figure 2 The figure shows a proportional pressure regulating valve device, including a proportional pressure regulating valve seat 100, a two-way cartridge valve core assembly 200, a two-way cartridge valve cover 300, a functional stack seat 400, a solenoid directional valve 500, a cartridge pilot relief valve 600, and a cartridge proportional direct-acting relief valve 700.

[0020] The proportional pressure regulating valve seat 100 serves as the base of the device, and a valve chamber 110 is formed therein. A main oil inlet 120 and a main oil return port 130 are provided on its outer side. The main oil inlet 120 is connected to the bottom surface of the valve chamber 110, and the main oil return port 130 is connected to the side surface of the valve chamber 110.

[0021] The two-way cartridge valve core assembly 200 is installed in the valve chamber 110 of the proportional pressure regulating valve seat 100, and is used to control the on / off of the oil passage in the valve chamber 110. In this embodiment, the two-way cartridge valve core assembly 200 consists of a valve core and a spring.

[0022] The two-way cartridge valve cover 300 is mounted on the proportional pressure regulating valve seat 100, and forms a first oil passage 310, a second oil passage 320, and a third oil passage 330 therein. One end of the first oil passage 310 is connected to the main oil inlet 120 of the proportional pressure regulating valve seat 100, and the other end is connected to one end of the second oil passage 320 and one end of the third oil passage 330. The other end of the second oil passage 320 is connected to the valve chamber 110 of the proportional pressure regulating valve seat 100. Damping plugs 311, 321, and 331 are provided in the first oil passage 310, the second oil passage 320, and the third oil passage 330 of the two-way cartridge valve cover 300. The damping plugs 311, 321, and 331 have small through holes to slow down the flow of oil, thereby reducing instantaneous impact, reducing damage to the valve assembly caused by instantaneous impact, and improving the service life of the valve assembly.

[0023] A functional stack base 400 is mounted on the valve cover 300 of a two-way cartridge valve, and a pressure regulating oil passage 410 is formed therein. One end of the pressure regulating oil passage 410 is connected to the other end of the third oil passage 330 of the valve cover 300. A damping plug 411 is provided in the pressure regulating oil passage 410 of the functional stack base 400. The damping plug 411 has a small through hole to slow down the flow of oil, thereby reducing instantaneous impact, reducing damage to the valve assembly from instantaneous impact, and improving the service life of the valve assembly. The electromagnetic directional valve 500 is mounted on the functional stack seat 400. It has an oil inlet P, an oil return port T, and working oil ports A and B. Its oil inlet P is connected to the other end of the pressure regulating oil circuit 410 of the functional stack seat 400. Its oil return port T is connected to the main oil circuit return port 130 of the proportional pressure regulating valve seat 100. Its working oil port A is connected to the main oil circuit return port 130 of the proportional pressure regulating valve seat 100. Its working oil port B is sealed.

[0024] The cartridge-type pilot relief valve 600 is mounted on the functional stack seat 400. It has an oil inlet P, an oil return T and a control oil port X. Its oil inlet P is connected to the pressure regulating oil circuit 410 of the functional stack seat 400, and its oil return T is connected to the main oil circuit return port 130 of the proportional pressure regulating valve seat 100.

[0025] The cartridge-type proportional direct-acting relief valve 700 is mounted on the functional stack seat 400. It has an oil inlet P and an oil return port T. Its oil inlet P is connected to the control oil port X of the cartridge-type pilot relief valve 600, and its oil return port T is connected to the main oil circuit return port 130 of the proportional pressure regulating valve seat 100.

[0026] In addition, a direct-acting relief valve 800 is installed on the two-way cartridge valve cover 300. This valve has an inlet P and a return port T. The inlet P is connected to the common connection point of the first oil passage 310, the second oil passage 320, and the third oil passage 330 of the two-way cartridge valve cover 300. The return port T is connected to the main oil passage return port 130 of the proportional pressure regulating valve seat 100. The pressure setting of the direct-acting relief valve 800 is 2.5 MPa, and it is used as a system safety valve.

[0027] The working principle of the proportional pressure regulating valve device of this utility model is as follows: During operation, primary control oil is introduced from the main oil inlet 120 of the proportional pressure regulating valve seat 100, and enters the valve chamber 110 of the proportional pressure regulating valve seat 100 via port X (one end of the first oil passage 310) on the two-way cartridge valve cover 300, damping plugs 311 and 331. When the primary control oil pressure is lower than the set pressure, the two-way cartridge valve core assembly 200 remains closed under the combined action of the primary control oil and the internal spring, meaning that port A and port B are not connected. When the primary control oil pressure reaches the set value, the two-way cartridge valve core assembly 200 opens and limits the pressure at port A, i.e., the system operating pressure, according to its pressure-flow characteristics.

[0028] The pressure setting of the primary control oil is jointly set by the function superposition seat 400 and the solenoid directional valve 500. The primary control oil is connected to the main return oil circuit through the damping plug 411 and the solenoid directional valve 500. When the solenoid directional valve 500 is not energized, the oil inlet P of the solenoid directional valve 500 is connected to the working oil port A, and the primary control oil returns directly. The valve chamber 110 of the proportional pressure regulating valve seat 100 cannot build pressure, and the oil at port A of the main oil circuit directly opens the valve core assembly 200 of the two-way cartridge valve. Port A is connected to port B. The oil flow resistance between port A and port B mainly comes from the oil flow performance of the two-way cartridge valve core assembly 200 itself. The working pressure of the system during standby is reduced to a minimum, making the equipment more energy-efficient.

[0029] When the solenoid directional valve 500 is energized, its inlet P is connected to its working port B. Primary control oil cannot return through the solenoid directional valve 500. At this time, the primary control oil pressure is controlled by the cartridge-type pilot relief valve 600 and the cartridge-type proportional direct-acting relief valve 700. The inlet P to the return port T of the cartridge-type pilot relief valve 600 is the main oil circuit for primary control oil. The control port X of the cartridge-type pilot relief valve 600 is connected to the inlet P of the cartridge-type proportional direct-acting relief valve 700, which is the secondary control oil. Its pressure is set by the cartridge-type proportional direct-acting relief valve 700 according to the given signal from the equipment control system. The pressure of the secondary control oil plus the pressure generated by the spring within the cartridge-type pilot relief valve 600 itself is the pressure of the primary control oil. The reason for using a cartridge-type pilot relief valve 600 to control the first-stage control oil pressure is that the oil flow capacity of direct-acting proportional relief valves, which are generally used to control control oil, is very small. However, the two-way cartridge valve selected in this invention has a large diameter, and the control oil flow generated by it at the moment of operation exceeds the oil flow capacity of the direct-acting proportional relief valve.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A proportional pressure regulating valve device, characterized in that, include: A proportional pressure regulating valve seat has a valve cavity formed inside it. A main oil inlet and a main oil return port are provided on its outer side. The main oil inlet is connected to the bottom surface of the valve cavity, and the main oil return port is connected to the side surface of the valve cavity. A two-way cartridge valve core assembly installed in the valve chamber of the proportional pressure regulating valve seat for controlling the on / off state of the oil passage within the valve chamber; The two-way cartridge valve cover is provided on the proportional pressure regulating valve seat. The two-way cartridge valve cover has a first oil passage, a second oil passage and a third oil passage formed inside. One end of the first oil passage is connected to the main oil passage inlet of the proportional pressure regulating valve seat, and the other end is connected to one end of the second oil passage and one end of the third oil passage. The other end of the second oil passage is connected to the valve cavity of the proportional pressure regulating valve seat. A functional stack seat is provided on the valve cover of the two-way cartridge valve. A pressure regulating oil passage is formed in the functional stack seat. One end of the pressure regulating oil passage is connected to the other end of the third oil passage of the valve cover of the two-way cartridge valve. The electromagnetic directional valve installed on the functional stack seat has an oil inlet, an oil return port, and first and second working oil ports. Its oil inlet is connected to the other end of the pressure regulating oil circuit of the functional stack seat, its oil return port is connected to the main oil circuit return port of the proportional pressure regulating valve seat, its first working oil port is connected to the main oil circuit return port of the proportional pressure regulating valve seat, and its second working oil port is sealed. A cartridge-type pilot-operated relief valve is installed on the functional stack base. The cartridge-type pilot-operated relief valve has an inlet port, a return port, and a control port. Its inlet port is connected to the pressure regulating oil circuit of the functional stack base, and its return port is connected to the main oil circuit return port of the proportional pressure regulating valve seat. A cartridge-type proportional direct-acting relief valve is installed on the functional stack seat. The cartridge-type proportional direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the control oil port of the cartridge-type pilot relief valve, and its oil return port is connected to the main oil return port of the proportional pressure regulating valve seat.

2. The proportional pressure regulating valve device as described in claim 1, characterized in that, A first damping plug is provided in the first oil passage of the two-way cartridge valve cover.

3. The proportional pressure regulating valve device as described in claim 1, characterized in that, A second damping plug is provided in the second oil passage of the two-way cartridge valve cover.

4. The proportional pressure regulating valve device as described in claim 1, characterized in that, A third damping plug is provided in the third oil passage of the two-way cartridge valve cover.

5. The proportional pressure regulating valve device as described in claim 1, characterized in that, A fourth damping plug is installed in the pressure regulating oil circuit of the functional superposition seat.

6. The proportional pressure regulating valve device according to any one of claims 1 to 5, characterized in that, A direct-acting relief valve is installed on the cover of the two-way cartridge valve. The direct-acting relief valve has an oil inlet and an oil return port. Its oil inlet is connected to the common connection point of the first oil passage, the second oil passage and the third oil passage of the cover of the two-way cartridge valve, and its oil return port is connected to the main oil passage return port of the proportional pressure regulating valve seat.

7. The proportional pressure regulating valve device as described in claim 6, characterized in that, The pressure of the direct-acting relief valve is set to 2.5 MPa.

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