Pressure compensation valve element structure integrating functions of one-way valve

Abstract

The utility model relates to the technical field of valve core structures, in particular to a pressure compensation valve core structure integrated with the function of a one-way valve, which simplifies an oil duct, reduces the number of parts, lowers cost and reduces pressure loss by integrating the one-way valve and a compensation valve core, and simultaneously, in a hydraulic system, if an action load is the highest load during normal work, the valve core structure can be used for compensating pressure. The pressure Pc is from a load and pushes the compensation valve element to the limit, so that the pressure Pc, the pressure P'and the pressure LS are equal to realize balance; when the load is not highest, LS pressure is higher than P ', the push rod pushes the compensation valve element to move downwards under the action of the LS pressure, a channel from P' to Pc is reduced, pressure loss is increased, finally, dynamic balance of Pc + P = P '= LS is achieved, and the compensation valve element and the push rod are still in an overall working state; when a load of the one-way valve is accidentally impacted to generate a pressure peak, Pc is larger than P 'due to the pressure peak, the push rod moves upwards, the compensation valve element moves downwards to close an oil passing channel from P' to Pc, and the pressure peak is prevented from being transmitted to protect the hydraulic pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve core structure technical field, concretely is a pressure compensation valve core structure of integrated one -way valve function. BACKGROUND

[0002] In the precise operation of the post -valve compensation principle, the oil liquid is after the accurate regulation of compensation valve core, needs to continue shuttling in the one -way valve according to the design path, from the angle of part composition, too many spare parts quantity not only makes the assembly process become complicated, is easy to introduce potential error risk in the assembly link, and greatly increases production cost and production cycle, from the performance level analysis, this symmetrical arrangement makes the oil liquid produce greater pressure loss at the one -way valve, and then has the adverse effect on the energy transmission efficiency and working stability of whole hydraulic system.

[0003] Therefore, a pressure compensation valve core structure integrated with one-way valve function is needed to improve the above problems. SUMMARY

[0004] The utility model discloses a pressure compensation valve core structure integrated with one-way valve function to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A pressure compensation valve core structure integrated with one-way valve function, comprising a plug and a valve body, the plug is installed at the port of the valve body, a push rod is slidably connected to the inner wall of the valve body, a compensation valve core is installed at one end of the push rod, an LS cavity is arranged between the plug and the push rod and on the inner wall of the valve body, a PC cavity is arranged between the push rod and the compensation valve core and on the inner wall of the valve body, and a P' cavity is arranged on one side of the compensation valve core and on the inner wall of the valve body.

[0007] As a preferred scheme of the utility model, the cross section of the plug is T-shaped structure, and the cross section of the valve body is concave-shaped structure.

[0008] As a preferred scheme of the utility model, the push rod is located directly below the plug, and the compensation valve core is located directly below the push rod.

[0009] As a preferred scheme of the utility model, a communication hole is formed on one side of the compensation valve core and on the outer wall of the valve body, and the P' cavity is located in the inner cavity of the communication hole.

[0010] As a preferred scheme of the utility model, the push rod and the compensation valve core are connected in a plug-in manner at the joint between one end of the compensation valve core and the inner wall of the valve body.

[0011] As the preferred scheme of the utility model, the valve body plays a limiting role on the compensation valve core, the compensation valve core is slidably connected on the inner wall of the valve body, the pressure value of the LS cavity is LS, the pressure value of the PC cavity is PC, and the pressure value of the P' cavity is P'.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、The compensation valve core in the pressure compensation valve core structure with the function of the one-way valve is integrated, the one-way valve and the compensation valve core are integrated, oil passage simplification is realized, the number of parts is reduced, the cost is reduced, the pressure loss is reduced, and in the hydraulic system, if the action load is the highest load during normal operation, the Pc pressure source is from the load and pushes the compensation valve core to the limit, so that the Pc, P' and LS pressures are equal to realize balance, when the load is not the highest, the LS pressure is higher than P', the push rod pushes the compensation valve core to move downward under the action of the LS pressure, the P' to Pc channel is reduced, the pressure loss is increased, and finally the dynamic balance of Pc+△P=P'=LS is achieved and the compensation valve core and the push rod are still in the overall working state; when the load is subjected to accidental impact to generate a pressure peak, because the pressure peak causes Pc to be greater than P', the push rod moves upward and the compensation valve core moves downward to close the P' to Pc oil passage, so that the pressure peak is prevented from being transmitted to protect the hydraulic pump, thereby beneficially solving the problems that in the compensation principle behind the valve, the oil needs to pass through the one-way valve after passing through the compensation valve core, the one-way valve is arranged symmetrically in the existing working piece structure, the number of parts is large, the cost is high, and the pressure loss is large. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The overall structure of the utility model is analyzed by the schematic diagram.

[0015] In the drawing: 1, plug; 2, valve body; 3, push rod; 4, compensation valve core; 5, LS cavity; 6, PC cavity; 7, P' cavity. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] Embodiment, please see Figure 1 The utility model provides a technical scheme:

[0018] The utility model discloses a pressure compensation valve core structure of integrated check valve function, including plug 1 and valve body 2, plug 1 is installed at the port of valve body 2, the inner wall of valve body 2 is slidably connected with push rod 3, one end of push rod 3 is installed with compensation valve core 4, is arranged between plug 1 and push rod 3 and is located the inner wall of valve body 2 PC cavity 5 is arranged between push rod 3 and compensation valve core 4 and is located the inner wall of valve body 2 PC cavity 6 is arranged on the one side of compensation valve core 4 and is located the inner wall of valve body 2 P' cavity 7.

[0019] In this embodiment, please refer to Figure 1 The cross section of plug 1 is T-shaped structure, the cross section of valve body 2 is concave shape structure, push rod 3 is located directly below plug 1, compensation valve core 4 is located directly below push rod 3, the one side of compensation valve core 4 and the outer wall of valve body 2 are provided with the communication hole, wherein P' cavity 7 is located in the inner cavity of the communication hole, the one end of compensation valve core 4 and the inner wall of valve body 2 meet, the connection mode of push rod 3 and compensation valve core 4 is plug-in connection, valve body 2 plays the limiting action to compensation valve core 4, compensation valve core 4 is slidably connected on the inner wall of valve body 2, the pressure value of LS cavity 5 is LS, the pressure value of PC cavity 6 is PC, and the pressure value of P' cavity 7 is P'.

[0020] The utility model discloses a pressure compensation valve core structure of integrated check valve function, including plug 1 and valve body 2, plug 1 is installed at the port of valve body 2, the inner wall of valve body 2 is slidably connected with push rod 3, one end of push rod 3 is installed with compensation valve core 4, is arranged between plug 1 and push rod 3 and is located the inner wall of valve body 2 PC cavity 5 is arranged between push rod 3 and compensation valve core 4 and is located the inner wall of valve body 2 PC cavity 6 is arranged on the one side of compensation valve core 4 and is located the inner wall of valve body 2 P' cavity 7.

[0021] Under the mode of normal work, the Pc pressure is derived from the load, when the load is the highest load, the P' pressure will drive compensation valve core 4 to move to the limit position, at this time, compensation valve core 4, push rod 3 and plug 1 are in contact with each other, and the oil passage from P' to LS is also communicated, at this time, the pressures of Pc, P' and LS are equal, and balance is realized.

[0022] When the load is not the highest load, the LS pressure is higher than the P' pressure, and the push rod 3 drives the compensation valve core 4 to move downward under the action of the Ls pressure, at this time, the passage from P' to Pc is gradually reduced, and the oil pressure loss ΔP from P' to Pc is increased, while the load is relatively stable, and the load is not the highest load, so the load Pc and the highest load LS are relatively stable, and finally, when the balance is realized, Pc+ΔP=P'=LS, and dynamic balance is realized, since the pressures of P' and LS are higher than that of Pc, the compensation valve core 4 and the push rod 3 are two parts, but they are still in the state of overall work at this time.

[0023] The function of the one-way valve is that when the load is impacted by an unexpected impact, the impact will form a pressure fluctuation of the load Pc, a pressure peak is generated, the pressure peak is transmitted to the pump, and the pump can be damaged, therefore, the one-way valve is forced to be closed under the action of the pressure peak, so that the pressure peak cannot be transmitted to the pump, and the hydraulic pump is protected, according to the function description, in the pressure peak state, the Pc pressure is greater than P', at this time, the push rod 3 moves upward, the compensation valve core 4 moves downward, the compensation valve core 4 moving downward will close the oil passage from P' to Pc, so that the Pc pressure is not transmitted forward, the function of the one-way valve is realized, the purpose of protecting the hydraulic pump is achieved, and thus it is beneficial to solve the problem that in the compensation principle behind the valve, the oil needs to pass through the one-way valve after passing through the compensation valve core, in the existing working piece structure, the one-way valve is symmetrically arranged, the parts are many, the cost is high, and the pressure loss is large.

[0024] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressure compensated spool structure integrated with a one-way valve function comprising a plug (1) and a valve body (2), characterized in that: The plug (1) is installed at the port of the valve body (2), the inner wall of the valve body (2) is slidably connected with the push rod (3), one end of the push rod (3) is installed with the compensation valve core (4), the LS cavity (5) is arranged between the plug (1) and the push rod (3) and located at the inner wall of the valve body (2), the PC cavity (6) is arranged between the push rod (3) and the compensation valve core (4) and located at the inner wall of the valve body (2), and the P' cavity (7) is arranged at one side of the compensation valve core (4) and located at the inner wall of the valve body (2).

2. The pressure compensated spool structure integrated with a check valve function according to claim 1, characterized in that: The cross section of the plug (1) is T-shaped structure, and the cross section of the valve body (2) is concave-shaped structure.

3. The pressure compensated spool structure integrated with a check valve function according to claim 1, characterized in that: The push rod (3) is located directly below the plug (1), and the compensation valve core (4) is located directly below the push rod (3).

4. The pressure compensated spool structure integrated with a check valve function according to claim 1, characterized in that: The compensation valve core (4) is provided with a communication hole at one side and located on the outer wall of the valve body (2), and the P' cavity (7) is located in the inner cavity of the communication hole.

5. The pressure compensated spool structure incorporating a one-way valve function of claim 1, wherein: The compensation valve core (4) is connected with the push rod (3) in plug-in connection mode at the joint between one end of the compensation valve core (4) and the inner wall of the valve body (2).

6. The pressure compensated spool structure incorporating a one-way valve function of claim 1, wherein: The valve body (2) limits the compensation valve core (4), the compensation valve core (4) is slidably connected to the inner wall of the valve body (2), the pressure value of the LS cavity (5) is LS, the pressure value of the PC cavity (6) is PC, and the pressure value of the P' cavity (7) is P'.

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