Cone valve type sequence valve

Abstract

The utility model discloses a cone valve type sequence valve which comprises a main valve seat, one end of the main valve seat is in threaded connection with a main valve sleeve, and the other end of the main valve seat is in threaded connection with a valve seat. The slide valve core is adaptively accommodated in the main valve sleeve and is driven to axially move; the pressure adjusting spring is contained in the main valve seat, and one end of the pressure adjusting spring is connected with the sliding valve element through a spring seat; the adjusting rod is connected with the other end of the pressure adjusting spring, and the middle of the adjusting rod is in threaded connection with the valve seat; wherein a control pressure opening is formed in the main valve sleeve in the axial direction, two sections of hole channels are formed in the radial side wall of the main valve sleeve, and when the control pressure opening reaches a preset value, the sliding valve element moves to achieve flow control over the two sections of hole channels. Meanwhile, flow gain is improved, opening impact of a hydraulic system is reduced, load holding capacity is improved, and the bucket is prevented from sliding down.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of electromagnetic valves, in particular to a cone valve type sequence valve. Background Art

[0002] A sequence valve is a valve that controls the sequential action of multiple actuators according to the pressure of the circuit in a system with more than two branch circuits. Currently, all sequence valves on the market are slide valve structures. In order to achieve the function of load holding, balancing valves are usually used to achieve the expected effect. However, the balancing valve has a complex structure and has high processing requirements for the cartridge valve. On this basis, and in order to meet the diversified development of the market, a cone valve type sequence valve is proposed. Utility Model Content

[0003] 1. Technical problems to be solved by the utility model:

[0004] The utility model provides a cone valve type sequence valve, which is used to solve the technical problems existing in the above background technology.

[0005] 2. Technical solution:

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A cone valve type sequence valve, the sequence valve comprising

[0008] A main valve seat, one end of which is threadedly connected to a main valve sleeve, and the other end of which is threadedly connected to a valve seat;

[0009] The sliding valve core is adapted to be received in the main valve sleeve and is driven to move axially;

[0010] The pressure regulating spring is received in the main valve seat, and one end of the pressure regulating spring is connected to the sliding valve core through the spring seat;

[0011] An adjusting rod is connected to the other end of the pressure regulating spring, and the middle part of the adjusting rod is threadedly connected to the valve seat;

[0012] Among them, a control pressure port is provided in the axial direction of the main valve sleeve, and two sections of channels are provided on the radial side wall of the main valve sleeve. When the control pressure port reaches a preset value, the sliding valve core moves to realize flow control of the two sections of channels.

[0013] Preferably, a penetrating damping hole is provided in the spring seat, one end of the damping hole is communicated with the internal channel of the sliding valve core, and the other end of the damping hole is communicated with the main valve seat and the inner cavity of the pressure regulating spring.

[0014] Preferably, the diameter of the damping hole is 1 mm.

[0015] Preferably, an inner hole is provided inside the main valve sleeve, and two step holes with different diameters are provided inside the inner hole, and a sealing slope is provided on a group of step holes close to the pressure regulating spring.

[0016] Preferably, the inner diameter of a group of step holes close to the pressure regulating spring is 10 mm, the bevel angle of the sealing bevel is 45 degrees, and the inner diameter of the inner hole of the other group of step holes is 9.53 mm.

[0017] Preferably, the sliding valve core is provided with two sets of outer circles corresponding to the step holes, and a sealing K angle close to one end of the pressure regulating spring, and the sealing K angle cooperates with the sealing inclined surface to form a sealing line.

[0018] Preferably, the diameter of the outer circle close to the pressure regulating spring is 10 mm, the diameter of the other set of outer circles is 9.53 mm, and the sealing K angle is provided with a 60-degree inclined surface.

[0019] Preferably, an O-ring groove is provided in the middle of the sliding valve core, and an O-ring is provided in the O-ring groove.

[0020] The utility model also provides a skid loader, comprising the above-mentioned cone valve type sequence valve.

[0021] 3. Beneficial effects:

[0022] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0023] The sequence valve provided by the utility model is mainly used for skid steer loaders and adopts a cone valve structure to reduce leakage of the sequence valve, while improving flow gain, reducing the impact of opening the hydraulic system, improving load holding capacity, and preventing the bucket from sliding down. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the main valve sleeve structure of the utility model

[0026] Figure 3 This is a schematic diagram of the structure of the sliding valve core of the utility model

[0027] Figure 4 This is a working principle diagram of the utility model.

[0028] Reference numerals:

[0029] 1-main valve seat; 2-main valve sleeve; 3-valve seat; 4-sliding valve core; 5-pressure regulating spring; 6-spring seat; 7-adjusting rod; 8-O-ring; 9-damping hole. DETAILED DESCRIPTION

[0030] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be noted that the structures not introduced in the present invention do not involve the design points and improvement directions of the present invention, and all adopt the existing technology. The above contents belong to the technical cognition scope of the utility model author. Since the technical content in this field is vast and too complicated, the above contents of this application do not necessarily constitute the prior art.

[0033] Reference Figure 1-4 This embodiment provides a cone valve type sequence valve, which is a sequence valve with a low leakage function, see attached Figure 1 , including a main valve seat 1, one end of which is threadedly connected to a main valve sleeve 2, and the other end of the main valve seat 1 is threadedly connected to a valve seat 3; a sliding valve core 4 is adapted to be accommodated in the main valve sleeve 2 and driven to move axially; a pressure regulating spring 5 is accommodated in the main valve seat 1, and one end of the pressure regulating spring 5 is connected to the sliding valve core 4 through a spring seat 6; an adjusting rod 7 is connected to the other end of the pressure regulating spring 5, and the middle part of the adjusting rod 7 is threadedly connected to the valve seat 3; wherein, a control pressure port is provided in the axial direction of the main valve sleeve 2, and two sections of channels are provided on the radial side wall of the main valve sleeve 2. When the control pressure port reaches a preset value, the sliding valve core 4 moves to realize flow control of the two sections of channels.

[0034] Considering the specific installation and implementation of each component, the front end of the main valve seat 1 is threadedly connected to the main valve sleeve 2, and the rear end is threadedly connected to the valve seat 3. The interior of the main valve sleeve 2 is provided with an inner hole, and the inner hole is provided with two step holes and a sealing inclined surface. The side wall of the main valve sleeve 2 is provided with two sections of channels, and a sliding valve core 4 is provided in the inner hole. The two outer circles of the middle part of the front end of the sliding valve core 4 are provided with steps of different diameters, and the middle step is provided with an O-ring groove. The end of the middle step is provided with a sealing K angle. The O-ring 8 is arranged in the middle groove of the sliding valve core 4, and the outer side contacts the inner hole of the main valve sleeve 2. A limiting step is provided at the tail of the valve core 4, the lower part of the step is limited by the main valve sleeve 2, and the upper part of the step is limited by a wire retaining ring. An internal channel is provided at the rear of the sliding valve core 4, the tail of the sliding valve core 4 and the front end hole of the spring seat 6, a damping hole 9 is provided inside the spring seat 6, a boss is provided at the rear of the spring seat 6, the boss is arranged at the front end inner hole of the pressure regulating spring 5, the pressure regulating spring 5 is arranged in the inner cavity of the main valve seat 1, the tail inner hole is arranged on the front boss of the adjusting rod 7, the front end of the adjusting rod 7 is arranged in the rear end hole of the main valve seat 1, and the middle part of the adjusting rod 7 is threadedly connected to the valve seat 3.

[0035] The utility model adopts a sliding cone valve structure, and the main valve sleeve 2 is provided with a sealing slope, which greatly reduces the leakage from ③ to ②, so that the bucket remains stable. At the same time, the O-ring 8 in the groove in the middle of the sliding valve core 4 expands due to pressure, and generates a certain resistance when sliding, which has a buffering and shock-absorbing effect on the opening and closing of the sliding valve core 4, thereby increasing the life of the valve.

[0036] Focus on reference Figure 1 and 4 In steady state, the oil flows from ③ to ② and is closed. When the pressure at ① reaches the preset value of the valve, the spool 4 moves and the oil flows from ③ to ②. Because the spring chamber leaks oil from the oil port ②, the back pressure of the oil port ② will affect the set pressure of the valve at a ratio of 1:1.

[0037] Specifically, refer to Figure 2 The inner hole of the main valve sleeve 2 is provided with two step holes and a sealing slope (see attached Figure 2 ), the inner hole at the front end of the main valve sleeve 2 is φ9.53mm, the inner hole in the middle of the main valve sleeve 2 is φ10mm, the inclined surface is 45°, and the inner holes and inclined surfaces at both ends are processed and formed at the same time, with good concentricity, ensuring the smooth opening and closing sliding of the sliding valve core.

[0038] Specifically, refer to Figure 3 The outer diameter of the front end of the sliding valve core 4 is φ9.53mm, the outer diameter of the middle part is φ10mm, and the front end of the middle part is provided with a sealing angle K (see attached Figure 3 ), the K angle end face is provided with a 60° bevel to reduce the edge collapse caused by the impact when the sliding valve core 4 is closed. The sealing K angle of the sliding valve core 4 cooperates with the sealing bevel of the main valve sleeve 2 to form a sealing line. The valve changes from a sliding valve structure to a sliding cone valve structure, which can greatly reduce the leakage from port ③ to ②.

[0039] Among them, an O-ring groove is provided in the middle of the sliding valve core 4, and a 70-degree (Shaw A) O-ring 8 is provided in the O-ring groove. After the O-ring 8 is assembled, there is almost no outer diameter compression, which ensures that the sliding valve core slides smoothly. The O-ring 8 expands under pressure and generates a certain resistance when sliding, which has a buffering and shock-absorbing effect on the opening and closing of the sliding cone valve core, thereby increasing the life of the sliding valve core 4 and the valve.

[0040] The inner hole of the spring seat 6 is provided with a φ1mm damping hole 9, the front end of the damping hole 9 is communicated with the internal channel of the sliding valve core 4, and the front end of the damping hole 9 is communicated with the main valve seat 1 and the inner cavity of the pressure regulating spring 5 to enhance the stability of the valve.

[0041] This sequence valve is used in the leveling system of the skid loader. The valve can provide a load holding function to prevent the bucket from sliding down. Port ③ is connected to the bucket, port ② is connected to the return oil, and port ① is the control pressure port. Under normal conditions, the oil flows from ③ to ② and is closed, and the bucket remains stable. When the set pressure is introduced at ①, the channel from ③ to ② is opened, and the oil flows from ③ to ②, and the bucket begins to descend.

[0042] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A cone valve type sequence valve, characterized in that: The sequence valve includes A main valve seat (1), one end of which is threadedly connected to a main valve sleeve (2), and the other end of the main valve seat (1) is threadedly connected to a valve seat (3); The sliding valve core (4) is adapted to be accommodated in the main valve sleeve (2) and is driven to move axially; A pressure regulating spring (5) is received in the main valve seat (1), and one end of the pressure regulating spring (5) is connected to the sliding valve core (4) via a spring seat (6); An adjusting rod (7) is connected to the other end of the pressure regulating spring (5), and a middle portion of the adjusting rod (7) is threadedly connected to the valve seat (3); A control pressure port is provided in the axial direction of the main valve sleeve (2), and two sections of channels are provided on the radial side wall of the main valve sleeve (2). When the control pressure port reaches a preset value, the sliding valve core (4) moves to achieve flow control of the two sections of channels.

2. A cone valve type sequence valve according to claim 1, characterized in that: A damping hole (9) is provided in the spring seat (6), one end of the damping hole (9) is communicated with the internal channel of the sliding valve core (4), and the other end of the damping hole (9) is communicated with the main valve seat (1) and the inner cavity of the pressure regulating spring (5).

3. A cone valve type sequence valve according to claim 2, characterized in that: The diameter of the damping hole (9) is 1 mm.

4. A cone valve type sequence valve according to claim 1, characterized in that: An inner hole is provided inside the main valve sleeve (2), and two step holes with different diameters are provided inside the inner hole. A sealing inclined surface is provided on a group of step holes close to the pressure regulating spring (5).

5. A cone valve type sequence valve according to claim 4, characterized in that: The inner diameter of a set of stepped holes close to the pressure regulating spring (5) is 10 mm, the bevel angle of the sealing bevel is 45 degrees, and the inner diameter of the other set of stepped holes is 9.53 mm.

6. A cone valve type sequence valve according to claim 4, characterized in that: The sliding valve core (4) is provided with two groups of outer circles corresponding to the step holes and a sealing K angle close to one end of the pressure regulating spring (5), wherein the sealing K angle cooperates with the sealing inclined surface to form a sealing line.

7. A cone valve type sequence valve according to claim 6, characterized in that: The diameter of the outer circle close to the pressure regulating spring (5) is 10 mm, the diameter of the other outer circle is 9.53 mm, and the sealing K angle is provided with a 60-degree inclined surface.

8. The cone valve type sequence valve according to claim 1, characterized in that: An O-ring groove is provided in the middle of the sliding valve core (4), and an O-ring (8) is provided in the O-ring groove.

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