A two-way relief valve

Abstract

The utility model discloses a two-way overflow valve. Through the arrangement of a first liquid inlet, a first liquid outlet, a second liquid inlet, a second liquid outlet, a left chamber, a right chamber, a valve core, a left channel and a right channel, the use requirements of the two-way overflow valve can be met without using two overflow valves and configuring two one-way valves. The structure is simple and the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a two-way overflow valve. Background Art

[0002] The hydraulic motor converts the liquid pressure provided by the hydraulic pump into mechanical energy output by its output shaft. In the hydraulic system, an overflow valve is usually used, which can keep the system pressure within a certain range. For the hydraulic motor, it can prevent the swing cylinder from overloading.

[0003] In the prior art, since the oil inlet pipe and the oil return pipe may exchange roles in different situations, the installation of the two-way relief valve usually consists of two relief valves and two one-way valves, which has a complex structure and is inconvenient to install. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model discloses a two-way overflow valve, which adopts the technical scheme of comprising a shell, an adjusting rod, a knob, a fixing nut, a first liquid inlet, a first liquid outlet, a second liquid inlet, a second liquid outlet, a left chamber, a right chamber, a valve core, a left channel, a right channel, a limiter and a spring structure. The adjusting rod is inserted into the left side of the shell, and the knob is fixed on the outer end of the adjusting rod. The threaded portion of the adjusting rod located on the outside is equipped with a fixing nut. The first liquid inlet, the first liquid outlet and the second liquid inlet are arranged at the bottom of the shell, and the second liquid outlet is arranged at the top. The interior of the shell is divided into a left chamber and a right chamber, and the passage between the two is open. The passage is closed by a valve core, and limit parts and spring structures are arranged at both ends of the valve core. The first liquid outlet and the second liquid outlet lead to the passage between the left chamber and the right chamber. An L-shaped left channel is opened at the lower left side of the valve core, and an L-shaped right channel is opened at the upper right side. When oil is fed into the first liquid inlet, the valve core is pushed to move to the right under the pressure of continuous oil inlet after the left chamber is filled, so that the left channel is aligned with the first liquid outlet to form a passage. When the two are aligned, the limit part on the left reaches the limit position. When hydraulic oil enters from the second liquid inlet, the valve core moves to the left, squeezing the spring structure arranged on the left, so that the right channel is connected with the second liquid outlet to form a passage.

[0005] As a preferred technical solution of the utility model, the limiting portion includes a left fixing plate and a right fixing plate, the left side surface of the valve core is fixed to the right fixing plate by an integrally formed shaft body, and the right side surface of the valve core is fixed to the left fixing plate by an integrally formed shaft body, and the left fixing plate and the right fixing plate reach the limiting position when they respectively move to the channel opening between the left chamber and the right chamber inside the shell.

[0006] As a preferred technical solution of the utility model, the spring structure includes a left spring structure and a right spring structure, wherein the right spring structure includes a right spring and a right fixed plate, the right side surface of the right fixed plate is connected to the right fixed plate through the right spring, and the right fixed plate is fixed to the end of the extending end of the adjusting rod.

[0007] As a preferred technical solution of the utility model, the left-side spring structure includes a left-side end hole, a left-side fixed column, a left-side end plate, a left-side spring and a blocking structure. A left-side fixed column is fixed to the left side surface inside the shell, and a left-side spring is also fixed to the left side surface. The left-side spring is integrally sleeved on the left-side fixed column, and its right end is fixedly connected to the annular left-side end plate. The left-side end plate is blocked by the blocking structure arranged on the left-side fixed column. The setting of the blocking part can make the left-side spring only be compressed to the left side. A left-side end hole is opened at the left center of the left side of the left fixed plate, and its position corresponds to the position of the left fixed column.

[0008] As a preferred technical solution of the utility model, the barrier structure includes a mounting groove, a mounting spring and a trapezoidal block. The mounting groove is opened at the upper part of the left fixed column near the right end, and the mounting spring is fixed in the mounting groove. The trapezoidal block is fixed at the upper end of the mounting spring. The trapezoidal block is in a right-angled trapezoid, the left side is a vertical surface, and the top is an inclined surface. The lowest point of the inclined surface is flush with the opening of the mounting groove. The trapezoidal block is a rigid material, and a layer of smooth material is coated on its inclined surface.

[0009] The beneficial effects of the utility model are as follows: through the arrangement of the first liquid inlet, the first liquid outlet, the second liquid inlet, the second liquid outlet, the left chamber, the right chamber, the valve core, the left channel and the right channel, the use requirement of the two-way overflow valve can be realized without using two overflow valves and configuring two one-way valves, and the structure is simple and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 It is a schematic diagram of a rear side cross-sectional structure of the utility model;

[0012] Figure 3 This is a second schematic diagram of the rear side cross-sectional structure of the utility model.

[0013] In the figure: housing 1, adjusting rod 2, knob 3, fixing nut 4, first liquid inlet 5, first liquid outlet 6, second liquid inlet 7, second liquid outlet 8, left chamber 9, right chamber 10, valve core 11, left channel 12, right channel 13, left fixing plate 14, right fixing plate 15, right spring 16, right fixing disk 17, left end hole 18, left fixing column 19, left end plate 20, left spring 21, mounting groove 22, mounting spring 23, trapezoidal block 24. DETAILED DESCRIPTION

[0014] Example 1

[0015] like Figures 1 to 3 As shown, the utility model discloses a two-way overflow valve, which adopts the technical scheme of comprising a housing 1, an adjusting rod 2, a knob 3, a fixing nut 4, a first liquid inlet 5, a first liquid outlet 6, a second liquid inlet 7, a second liquid outlet 8, a left chamber 9, a right chamber 10, a valve core 11, a left channel 12, a right channel 13, a limiter and a spring structure. The adjusting rod 2 is inserted into the left side of the housing 1, and the knob 3 is fixed on the outer end thereof. The threaded portion of the adjusting rod 2 located on the outside is equipped with a fixing nut 4. A first liquid inlet 5, a first liquid outlet 6 and a second liquid inlet 7 are provided at the bottom of the shell 1, and a second liquid outlet 8 is provided at the top. The interior of the shell 1 is divided into a left chamber 9 and a right chamber 10, and the channel between the two is closed by a valve core 11. Limiting parts and spring structures are provided at both ends of the valve core 11. The first liquid outlet 6 and the second liquid outlet 8 lead to the channel between the left chamber 9 and the right chamber 10. An L-shaped left channel 12 is opened at the lower left side of the valve core 11, and an L-shaped right channel 13 is opened at the upper right side.

[0016] As a preferred technical solution of the utility model, the limiting part includes a left fixing plate 14 and a right fixing plate 15. The left side of the valve core 11 is fixed to the right fixing plate 15 by an integrally formed shaft, and the right side of the valve core 11 is fixed to the left fixing plate 14 by an integrally formed shaft.

[0017] As a preferred technical solution of the utility model, the spring structure includes a left spring structure and a right spring structure, the right spring structure includes a right spring 16 and a right fixed plate 17, the right side surface of the right fixed plate 15 is connected to the right fixed plate 17 through the right spring 16, and the right fixed plate 17 is fixed to the end of the extending end of the adjusting rod 2.

[0018] As a preferred technical solution of the utility model, the left spring structure includes a left end hole 18, a left fixed column 19, a left end plate 20, a left spring 21 and a blocking structure. The left fixed column 19 is fixed to the left side surface of the shell 1, and the left spring 21 is also fixed to the left side surface. The left spring 21 is integrally sleeved on the left fixed column 19, and the right end of the left spring 21 is fixedly connected to the annular left end plate 20. The left end plate 20 is blocked by the blocking structure provided on the left fixed column 19. The left end hole 18 is opened at the left center of the left side of the left fixed plate 14, and its position corresponds to the position of the left fixed column 19.

[0019] As a preferred technical solution of the utility model, the barrier structure includes a mounting groove 22, a mounting spring 23 and a trapezoidal block 24. The mounting groove 22 is opened at the upper part of the right end of the left fixed column 19, and the mounting spring 23 is fixed in the mounting groove 22. The trapezoidal block 24 is fixed at the upper end of the mounting spring 23. The trapezoidal block 24 is in a right-angled trapezoid, with the left side being a vertical surface and the top being an inclined surface. The lowest point of the inclined surface is flush with the opening of the mounting groove 22. The trapezoidal block 24 is made of rigid material, and a layer of smooth material is coated on its inclined surface.

[0020] The working principle of the utility model is as follows: when in use, when oil flows into the first liquid inlet 5, the valve core 11 is pushed to the right under the pressure of continuous oil flow after the left chamber 9 is filled, so that the left channel 12 is aligned with the first liquid outlet 6 to form a passage. When the two are aligned, the limit part on the left reaches the limit position. When hydraulic oil enters from the second liquid inlet 7, the valve core 11 moves to the left, squeezing the spring structure set on the left, so that the right channel 13 is connected with the second liquid outlet 7 to form a passage.

[0021] Components not described in detail herein are prior art.

[0022] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A two-way relief valve, comprising a housing (1), an adjusting rod (2), a knob (3) and a fixing nut (4), characterized in that: The housing (1) comprises a first liquid inlet (5), a first liquid outlet (6), a second liquid inlet (7), a second liquid outlet (8), a left chamber (9), a right chamber (10), a valve core (11), a left channel (12), a right channel (13), a limiter and a spring structure; an adjusting rod (2) is inserted into the left side of the housing (1), a knob (3) is fixed at the outer end of the adjusting rod (2), and a fixing nut (4) is installed at the outer threaded part of the adjusting rod (2); the first liquid inlet (5), the first liquid outlet (6) and the second liquid outlet (8) are arranged at the bottom of the housing (1); The housing (1) has two liquid inlets (7) and a second liquid outlet (8) arranged above the second liquid inlet; the interior of the housing (1) is divided into a left chamber (9) and a right chamber (10), and the passage between the two is closed by a valve core (11); limit portions and spring structures are arranged at both ends of the valve core (11); the first liquid outlet (6) and the second liquid outlet (8) lead to the passage between the left chamber (9) and the right chamber (10); the valve core (11) has an L-shaped left channel (12) at the lower left side, and an L-shaped right channel (13) at the upper right side.

2. A two-way relief valve according to claim 1, characterized in that: The limiting portion comprises a left fixing plate (14) and a right fixing plate (15); the left side surface of the valve core (11) is fixed to the right fixing plate (15) via an integrally formed shaft; and the right side surface of the valve core (11) is fixed to the left fixing plate (14) via an integrally formed shaft.

3. A two-way relief valve according to claim 2, characterized in that: The spring structure comprises a left spring structure and a right spring structure; the right spring structure comprises a right spring (16) and a right fixing plate (17); the right side surface of the right fixing plate (15) is connected to the right fixing plate (17) via the right spring (16); the right fixing plate (17) is fixed to the end of the extending end of the adjusting rod (2).

4. A two-way relief valve according to claim 3, characterized in that: The left spring structure comprises a left end hole (18), a left fixed column (19), a left end plate (20), a left spring (21) and a blocking structure; a left fixed column (19) is fixed on the left side surface of the shell (1), and a left spring (21) is also fixed on the left side surface; the left spring (21) is integrally sleeved on the left fixed column (19), and the right end of the left spring (21) is fixedly connected to the annular left end plate (20); the left end plate (20) is blocked by the blocking structure provided on the left fixed column (19); a left end hole (18) is opened at the left center of the left side of the left fixed plate (14), and its position corresponds to the position of the left fixed column (19).

5. A two-way relief valve according to claim 4, characterized in that: The barrier structure comprises a mounting groove (22), a mounting spring (23) and a trapezoidal block (24); the mounting groove (22) is formed at the upper part of the left fixing column (19) near the right end, a mounting spring (23) is fixed in the mounting groove (22), and the upper end of the mounting spring (23) is fixed with the trapezoidal block (24); the trapezoidal block (24) is in the shape of a right-angled trapezoid, the left side surface is a vertical surface, the upper side surface is an inclined surface, and the lowest point of the inclined surface is flush with the opening of the mounting groove (22).

6. A two-way relief valve according to claim 5, characterized in that: The trapezoidal block (24) is made of a rigid material, and its inclined surface is coated with a layer of smooth material.

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