Regulating valve and breaking hammer

Abstract

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a regulating valve and a breaking hammer. The breaking hammer solves the problem that an adjusting valve in an existing breaking hammer is inconvenient to switch under the on-off conditions of different oil ways. The regulating valve comprises a valve cover, a valve body is rotationally arranged on the valve cover, and the regulating valve is characterized in that a first assembly hole is formed in the circumferential surface of the valve cover in the direction of the valve body, a limiting assembly abutting against the valve body is arranged in the first assembly hole in a telescopic mode, and a plurality of first limiting grooves capable of being matched with the limiting assembly are formed in the circumferential surface of the valve body; one first limiting groove corresponds to one working condition position of the adjusting valve, and when the valve body rotates to one working condition position relative to the valve deck, the limiting assembly is matched with the corresponding first limiting groove in the working condition position and can limit rotation of the valve deck. The adjusting valve in the breaking hammer can be conveniently switched between on-off conditions of different oil ways.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, and in particular relates to a regulating valve and a breaking hammer. Background Art

[0002] Hydraulic breakers play a vital role in the operation of mechanical equipment such as excavators and loaders. Hydraulic breakers use hydraulic systems as power to output impact energy, thereby crushing stones, concrete, etc. As the demand for engineering operations becomes more and more diverse, the market has put forward higher and higher requirements on the performance of hydraulic impact equipment. In existing hydraulic breakers, it is usually used to combine hydraulic energy and air pressure energy to transmit energy to the working object, and then act on the working object to achieve the purpose of the operation, such as crushing ore.

[0003] The Chinese patent with the announcement number CN219013040U discloses a device that can realize the switching of the impact function of a breaker hammer. The change of the internal oil circuit in the breaker hammer is realized by the regulating valve assembly. However, when changing the on-off of the oil circuit, the regulating valve assembly in the patent needs to first press down the regulating valve pin to release the hexagon regulating valve to enable it to rotate, and then rotate the hexagon regulating valve. After the hexagon regulating valve rotates to a suitable position, the regulating valve pin is released to realize the re-limitation of the hexagon regulating valve by the regulating valve pin. The regulating valve assembly used for the breaker hammer in the patent makes the switching of its oil circuit more complicated. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and propose a regulating valve and a breaker. The technical problem to be solved by the utility model is: how to realize the convenient switching of the regulating valve in the breaker under different oil circuit on-off conditions.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A regulating valve comprises a valve cover, on which a valve body is rotatably arranged, and is characterized in that a mounting hole is provided on the circumferential surface of the valve cover toward the valve body, a limit assembly is telescopically arranged in the assembly hole for pressing toward the valve body, a plurality of limit grooves which can cooperate with the limit assembly are provided on the circumferential surface of the valve body, and a limit groove corresponds to an operating position of the regulating valve. When the valve body rotates to one of the operating positions relative to the valve cover, the limit assembly cooperates with the corresponding limit groove on the operating position and can limit the rotation of the valve cover.

[0007] When the valve body is in a closed position, the limiter will move in a direction that the valve body is in a closed position, and when ... The oil circuit is switched in the device; in the regulating valve, an assembly hole 1 is opened on the circumferential surface of the valve cover toward the valve body, the assembly hole 1 can guide the extension and retraction of the limit assembly, and a limit groove 1 is opened on the circumference of the valve body. The limit assembly located in the assembly hole 1 applies a top pressure to the valve body in the radial direction of the valve body, so that the limit assembly cooperates with the limit groove 1 to effectively realize the circumferential limitation of the valve body, and restricts the rotation of the valve body without human operation, which can realize the convenience of regulating valve oil circuit switching and ensure the stability of the regulating valve after the oil circuit is switched.

[0008] In the above-mentioned regulating valve, the valve cover is provided with a second assembly hole in the axial direction, the valve body includes an adjustment section located in the second assembly hole, the limit assembly is at least partially located in the second assembly hole, and a plurality of the first limit grooves are provided on the circumferential surface of the adjustment section at circumferential intervals. The limit assembly keeps pressing the valve body, and the adjustment section of the valve body is located in the second assembly hole, so that the valve body does not deviate when subjected to the pressure of the limit assembly, thereby ensuring the reliability of the cooperation between the limit assembly and the first limit groove.

[0009] In the above-mentioned regulating valve, the regulating section is provided with a limiting groove 2 extending in the direction of the valve body rotation path, and a plurality of limiting grooves 1 are provided on the bottom wall of the limiting groove 2, wherein two of the limiting grooves 1 are respectively located at the two ends of the limiting groove 2, and the side walls at the two ends of the limiting groove 2 and the groove wall of the limiting groove 1 located at the end can contact the limiting assembly at the same time. The side walls at the two ends of the limiting groove 2 limit the maximum rotation range of the valve body, and the limiting groove 1 corresponding to the working position most commonly used by the regulating valve can be set at the two ends of the limiting groove 2. When the user rotates to the limiting groove 1 at the two ends of the limiting groove 2, the limiting assembly contacts the side walls of the limiting groove 2 and the groove wall of the limiting groove 1 at the same time, and the limiting assembly and the groove wall of the limiting groove 1 can feedback to the user that the user has adjusted to the corresponding working position. The contact between the limiting assembly and the side walls at the two ends of the limiting groove can further enhance the feedback to the user, and can prevent the valve body from performing an invalid rotation stroke, and facilitate the switching of the regulating valve between different oil circuit on-off conditions.

[0010] In the above-mentioned regulating valve, three limiting grooves 1 are provided on the bottom wall of the limiting groove 2, wherein two limiting grooves 1 are respectively located at the two ends of the limiting groove 2, and one of the limiting grooves 1 is located between the two ends of the limiting groove 2. The three limiting grooves 1 provided on the valve body define the regulating valve to have three specific working positions, and two of the limiting grooves 1 are respectively arranged at the ends of the limiting groove 2, wherein one limiting groove 1 is located between the two ends of the limiting groove 2, which can facilitate blind operation of the user. For example, when the user needs to use the working position corresponding to the limiting groove 1 in the middle of the limiting groove 2, the user rotates the valve body clockwise / counterclockwise, and the limiting assembly will contact one of the side walls of the two ends of the limiting groove 2, and the user will get feedback that the user cannot continue to rotate, and then rotate the valve body in the opposite direction. During the rotation process, the limiting assembly will switch from the state of contacting the bottom wall of the limiting groove 2 to the state of contacting the groove wall of the limiting groove 1. When switching, the user can also get feedback that the limiting groove 1 in the middle of the limiting groove 2 is switched, thereby facilitating the blind operation of the user switching between the three working positions.

[0011] In the above-mentioned regulating valve, the limit assembly includes an elastic member and a positioning pin, the elastic member is fixedly arranged in the first assembly hole, one end of the positioning pin is located in the first assembly hole and abuts against the elastic member, and the other end is located in the second assembly hole and can contact the groove wall of the first limit groove or abut against the bottom wall of the second limit groove. The elastic member is fixedly arranged in the first assembly hole, which can make the positioning pin have the power to expand and contract in the first assembly hole, so that the positioning pin can contact the groove wall of the first limit groove or keep abutting against the bottom wall of the second limit groove.

[0012] In the above-mentioned regulating valve, the limit assembly also includes a plugging wire screwed to the assembly hole 1, the plugging wire is located outside the elastic member and abuts against the elastic member. The plugging wire is screwed to the assembly hole 1, and by rotating the plugging wire, the plugging wire moves axially along the assembly hole 1, thereby adjusting the pressure of the elastic member on the positioning pin.

[0013] In the above-mentioned regulating valve, the valve body further includes a connecting section located outside the valve cover, a channel 1 is formed on the end surface of the connecting section, and a channel 2 is formed on the outer peripheral surface of the connecting section, and the channel 1 is connected to the channel 2. After the regulating valve is installed on the device, the valve body is rotated to change the direction of the channel 2, so that the channel 2 is connected to different flow channels in the device, thereby changing the on-off condition of the channel 1 and the different flow channels in the device.

[0014] A breaker hammer includes the above-mentioned regulating valve, and the breaker hammer includes a cylinder body on which the regulating valve is installed, a stroke chamber and a normally high-pressure chamber are opened on the cylinder body, a first flow channel connected to the normally high-pressure chamber is opened on the chamber wall of the stroke chamber, and an anti-aircraft chamber connected to the normally high-pressure chamber is also opened on the chamber wall of the stroke chamber, channel 1 of the valve body is connected to the anti-aircraft chamber, and the regulating valve has at least two working positions. When the regulating valve is in the first working position, channel 2 is not connected to the normally high-pressure chamber; when the valve body is in the second working position, channel 2 is connected to the normally high-pressure chamber, and the oil in the cylinder body flows back to the stroke chamber from the stroke chamber through the first flow channel, the normally high-pressure chamber, channel 2, channel 1 and the anti-aircraft chamber in sequence. A regulating valve is provided in the breaker hammer, through which the breaker hammer can be controlled to switch between the first working position and the second working position. The limit assembly in the regulating valve used in the breaker hammer applies a top pressure to the valve body in the radial direction of the valve body, so that the limit assembly cooperates with the limit groove to effectively realize circumferential limitation of the valve body, restricting the rotation of the valve body without human operation, and realizing convenient switching of the regulating valve oil circuit while ensuring the stability of the regulating valve oil circuit after switching.

[0015] In the above-mentioned breaker, the cylinder body is also provided with a signal hole cavity connected with the air defense chamber, and the regulating valve has three working positions. When the valve body is in the third working position, the channel 2 is connected with the signal hole cavity, and the oil in the cylinder body passes through the air defense chamber, channel 1, channel 2 and the signal hole cavity from the stroke cavity in sequence. The signal hole cavity provided on the cylinder body can provide the breaker with a third working condition, and the breaker can be switched between the first working condition, the second working condition and the third working condition through the regulating valve.

[0016] In the above-mentioned breaker, the limit grooves 1 at both ends of the limit groove 2 correspond to the second working position and the third working position respectively. In the first working position, the valve body is not connected with the normally high pressure chamber and the signal hole chamber, and the oil does not produce a circumferential rotation force on the valve body; in the second working position, the oil in the normally high pressure chamber will enter the channel 1 through the channel 2; in the third working position, the oil in the middle end return oil chamber will enter from the channel 1 and flow out from the channel 2;

[0017] In the above-mentioned second working position and third working position, the oil will generate a force for the valve body to rotate circumferentially along its axis, and the limit grooves 1 at both ends of the limit groove 2 correspond to the second working position and the third working position respectively. When the oil generates a circumferential rotational force on the valve body, the limit assembly can simultaneously abut against the groove wall of the limit groove 1 and the side wall of the limit groove 2, thereby enabling the regulating valve to remain stable in the second working position and the third working position; in the first working position, the oil does not generate a force for the valve body to rotate circumferentially, and the valve body can remain stable without rotating only through the cooperation of the limit assembly and the limit groove 1.

[0018] Compared with the prior art, the regulating valve and breaker have the following advantages:

[0019] While facilitating the switching of the oil circuit of the regulating valve, the stability of the oil circuit of the regulating valve can also be ensured after the switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the regulating valve.

[0021] Figure 2 This is the front view of the regulating valve.

[0022] Figure 3 yes Figure 2 Section view AA.

[0023] Figure 4 It is a three-dimensional structural diagram of the valve body;

[0024] Figure 5 It is a cross-sectional view of a breaker hammer.

[0025] Figure 6 It is a schematic diagram of the oil flow direction in the breaker when the regulating valve is in the first working position.

[0026] Figure 7 It is a schematic diagram of the oil flow direction in the breaker when the regulating valve is in the second working position.

[0027] Figure 8 It is a schematic diagram of the oil flow direction in the breaker when the regulating valve is in the third working position.

[0028] In the figure, 1, valve cover; 1a, assembly hole 1; 1b, assembly hole 2; 2, valve body; 2a, adjustment section; 2b, connecting section; 2b1, channel 1; 2b2, channel 2; 3, limit groove 1; 4, limit groove 2; 4a, bottom wall; 4b, side wall; 5, limit assembly; 5a, elastic member; 5b, positioning pin; 5c, blocking wire; 6, indicator part; 7, cylinder body; 8, stroke chamber; 9, normal high pressure chamber; 10, signal hole chamber; 11, air defense chamber; 12, middle end oil return chamber; 13, first flow channel. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 5 As shown, the breaker includes a cylinder body 7, on which a regulating valve is arranged. The regulating valve has a plurality of working positions for switching the working mode of the breaker.

[0031] like Figures 1 to 5The regulating valve shown includes a valve cover 1, which is fixed on a cylinder body 7. A valve body 2 is rotatably arranged on the valve cover 1. An assembly hole 1a is provided on the circumferential surface of the valve cover 1 toward the valve body 2. A limit assembly 5 is telescopically arranged in the assembly hole 1a and presses against the valve body 2. The assembly hole 1a in the regulating valve is provided on the circumferential surface of the valve cover 1 toward the valve body 2. The assembly hole 1a can guide the extension and retraction of the limit assembly 5. A plurality of limit grooves 3 that can cooperate with the limit assembly 5 are provided on the circumferential surface of the valve body 2. Each limit groove corresponds to a regulating valve working position. Different working positions are switched by rotating the valve body 2. When the valve body 2 rotates relative to the valve cover 1, the limit assembly 5 escapes from one of the limit grooves 3, and the valve body 2 squeezes the limit assembly 5 to make it retract. At this time, the limit assembly 5 keeps top pressure on the valve body 2, and when the valve body 2 rotates to a suitable working position, the limit assembly 5 automatically enters the limit groove 3 corresponding to the working position, realizing the limitation of the circumferential rotation of the valve body 2 relative to the valve cover 1, limiting the rotation of the valve body 2 without human operation, and realizing convenient switching of the regulating valve oil circuit while ensuring the stability of the regulating valve oil circuit after switching.

[0032] Further, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the valve cover 1 is provided with an assembly hole 1b in the axial direction, the valve body 2 includes an adjustment section 2a located in the assembly hole 1b, the limit assembly 5 is at least partially located in the assembly hole 1b, and a plurality of limit grooves 3 are circumferentially spaced apart and arranged on the circumferential surface of the adjustment section 2a. Figure 4 As shown, a limiting groove 24 is provided on the adjusting section 2a in the direction of the rotation path of the valve body 2, and a plurality of limiting grooves 13 are provided on the bottom wall 4a of the limiting groove 24, wherein two limiting grooves 13 are respectively located at the two ends of the limiting groove 24, and the side wall 4b at the end of the limiting groove 24 and the groove wall of the limiting groove 13 located at the end can contact the limiting assembly 5 at the same time. The side walls 4b at the two ends of the limit groove 24 limit the maximum rotation range of the valve body 2. The limit groove 13 corresponding to the working position most commonly used by the regulating valve can be set at the two ends of the limit groove 24. When the user rotates to the limit groove 13 on the two ends of the limit groove 24, the limit component 5 contacts the side walls 4b of the limit groove 24 and the groove wall of the limit groove 13 at the same time. The limit component 5 and the groove wall of the limit groove 13 can feedback that the user has adjusted to the corresponding working position. The contact between the limit component 5 and the side walls 4b at the ends of the limit groove 24 can further enhance the feedback to the user and prevent the valve body 2 from performing an invalid rotation stroke, thereby facilitating the switching of the regulating valve between different oil circuit on-off conditions; or the limit grooves 13 located at the two ends of the limit groove 24 correspond to the working position that is easy to generate circumferential rotation force on the valve body 2, so that the side walls 4b of the limit groove 24 can be used to strengthen the restriction on the rotation of the valve body 2, thereby balancing the effect of convenient switching of the working position and stability.

[0033] like Figure 3 As shown, the limit assembly 5 includes an elastic member 5a and a positioning pin 5b. The elastic member 5a is fixed in the assembly hole 1a. The elastic member 5a can be fixed in the assembly hole 1a by the connection between the elastic member 5a and the valve cover 1. For example, the elastic member 5a is directly screwed to the valve cover 1 or connected by adhesive. The elastic member 5a can also be assembled on the breaker through the valve cover 1, and then prevented from coming out by the inner wall of the assembly hole 3 of the breaker. One end of the elastic member 5a abuts on the inner wall of the assembly hole 3, and the other end abuts on the positioning pin 5b. This embodiment takes the breaker as an example, and the regulating valve can also be applied to different devices or equipment. The elastic member 5a can be a compression spring or a rubber column, and a compression spring is preferably used. When the valve body 2 rotates, the bottom wall 4a of the limit groove 2 4 acts on the positioning pin 5b, compressing the elastic member 5a so as to realize the telescopic setting of the limit assembly 5 in the assembly hole 1a.

[0034] Further, such as Figure 3 As shown, the limiting assembly 5 also includes a blocking wire 5c screwed with the assembly hole 1a. The blocking wire 5c, the elastic member 5a and the positioning pin 5b are arranged in sequence from the outside to the inside of the assembly hole 1a. One end of the elastic member 5a abuts against the blocking wire 5c, and the other end abuts against the positioning pin 5b. The blocking wire 5c is screwed with the assembly hole 1a. By rotating the blocking wire 5c, the blocking wire 5c moves axially along the assembly hole 1a, thereby adjusting the pressure of the elastic member 5a on the positioning pin 5b.

[0035] Further, such as Figure 3 and Figure 4 As shown, the groove wall of the limiting groove 13 is an arc surface or a spherical surface, the end surface of the positioning pin 5b located in the assembly hole 1b is spherical or an arc surface, and at least part of the arc surface of the end surface of the positioning pin 5b is located outside the limiting groove 13. Further, assuming that the diameter of the limiting groove is 1 cm, the diameter of the arc surface or spherical surface of the end surface of the positioning pin 5b is also 1 cm, and at most 2 / 3 of the diameter of the positioning pin 5b is located in the limiting groove 13, so as to ensure that when the user rotates the valve body 2, the end of the positioning pin 5b can be disengaged from the limiting groove 13. Or the end surfaces of the limiting groove 13 and the positioning pin 5b are both conical surfaces, and the angle of the conical surfaces is at least greater than 90°, so as to ensure that when the user rotates the valve body 2, the end of the positioning pin 5b can be disengaged from the limiting groove 13. Preferably, the groove wall of the limiting groove 13 is an arc surface, and the end surface of the positioning pin 5b is a spherical surface.

[0036] Three limiting grooves 1 3 are formed on the bottom wall 4 a of the limiting groove 2 4 , wherein two limiting grooves 1 3 are respectively located at the two ends of the limiting groove 2 4 , and one limiting groove 1 3 is located between the two ends of the limiting groove 2 4 . The regulating valve has three specific working positions. Three limit grooves 3 are provided on the valve body 2 corresponding to the three working positions. Two of the limit grooves 3 are respectively arranged at the ends of the limit groove 2 4, and one of the limit grooves 3 is located between the two ends of the limit groove 2 4, which can facilitate the user's blind operation. For example, when the user needs to use the working position corresponding to the limit groove 3 in the middle of the limit groove 2 4, the user rotates the valve body 2 clockwise / counterclockwise, and the limit component 5 will contact one of the side walls 4b at the two ends of the limit groove 2 4. The user will get feedback that he cannot continue to rotate, and then rotate the valve body 2 in the opposite direction. During the rotation, the limit component 5 will switch from the state of contacting the bottom wall 4a of the limit groove 2 4 to the state of contacting the groove wall of the limit groove 3. When switching, the user can also get feedback that it has switched to the limit groove 3 in the middle of the limit groove 2 4, thereby facilitating the user's blind operation of switching between the three working positions.

[0037] Further, as 1 and Figure 4 As shown, the valve body 2 also includes a connecting section 2b located outside the valve cover 1, and a channel 1 2b1 is provided on the end surface of the connecting section 2b, and a channel 2b2 is also provided on the outer peripheral surface of the connecting section 2b, and the channel 1 2b1 and the channel 2 2b2 are connected. The valve body 2 is rotated to change the direction of the channel 2b2, so that the channel 2b2 is connected with different flow channels in the device, thereby changing the connection and disconnection of the channel 1 2b1 and the different flow channels in the device. An indicator part 6 is provided on the end surface of the regulating section 2a of the valve body 2, and the indicator part 6 is located directly above the channel 2b2. The setting of the indicator part 6 can facilitate the user to confirm the direction of the channel 2b2. If necessary, the user can also add an indicator mark on the device to further clarify the working condition information.

[0038] In the utility model, a stroke chamber 8, a normally high pressure chamber 9 and a signal hole chamber 10 are provided on the cylinder body 7 of the breaker, a first flow channel 13 connected to the normally high pressure chamber 9 is provided on the cavity wall of the stroke chamber 8, an anti-air strike chamber 12 connected to the normally high pressure chamber 9 and the signal hole chamber 10 is also provided on the cavity wall of the stroke chamber 8, the stroke chamber 8 includes a middle end oil return chamber 12, the middle end oil return chamber 12 and the signal hole chamber are located on the right side of the anti-air strike chamber 12, and the normally high pressure chamber 9 is located on the left side of the anti-air strike chamber 12. After the regulating valve is assembled on the cylinder body 7, the channel 1 2b1 is connected to the anti-air strike chamber 11, and the rotation of the valve body 2 changes the direction of the channel 2 2b2 to switch the connection between the normally high pressure chamber 9 and the signal hole chamber 10 and the anti-air strike chamber 11, thereby realizing different working modes of the breaker.

[0039] In this embodiment, the regulating valve has three working positions, and the valve body 2 is rotated to switch between the first working position, the second working position and the third working position. The first working position corresponds to the normal mode of the breaker, the second working position corresponds to the anti-air strike mode of the breaker, and the third working position corresponds to the stroke reduction mode of the breaker.

[0040] like Figure 6 As shown, when the breaker is in the normal mode, the regulating valve is in the first working position, and the second channel 2b2 is not connected with the normally high pressure chamber 9 and the signal hole chamber 10.

[0041] like Figure 7 As shown, when the breaker is in the anti-airstrike mode, the regulating valve is in the second working position, channel 2b2 is connected to the normally high-pressure chamber 9, and the oil in the cylinder body 7 flows back from the stroke chamber 8 through the first flow channel 13, the normally high-pressure chamber 9, channel 2b2, channel 1 2b1 and the anti-airstrike chamber 11 in sequence to the stroke chamber 8, and flows to the middle-end oil return chamber 12, thereby achieving the anti-airstrike effect by reducing the normally high pressure.

[0042] As shown in Figure 8, when the breaker is in the stroke reduction mode, the regulating valve is in the third working position, the second channel 2b2 is connected to the signal hole cavity 10, and the oil in the cylinder body 7 passes through the air defense cavity 11, the first channel 2b1, the second channel 2b2 and the signal hole cavity 10 from the stroke cavity 8. When the breaker piston moves to the air defense cavity 11, it starts to change direction, achieving the effect of reducing the stroke, reducing the striking force, and increasing the striking frequency.

[0043] Furthermore, the limit grooves 13 at both ends of the limit groove 24 in the regulating valve correspond to the second working position and the third working position respectively, and the limit groove 13 between the two ends of the limit groove corresponds to the first working position. In the first working position, the valve body 2 is not connected with the normally high pressure chamber 9 and the signal hole chamber 10, and the oil does not generate a circumferential rotation force on the valve body 2; in the second working position, the oil in the normally high pressure chamber 9 will enter the channel 1 2b1 through the channel 2 2b2; in the third working position, the oil in the middle end oil return chamber 12 will enter from the channel 1 2b1 and flow out from the channel 2 2b2; in the above-mentioned second working position and third working position, the oil will flow into the channel 1 2b1 and flow out from the channel 2 2b2, which generates a circumferential rotation force on the valve body 2 along its axis. The limit grooves 1 3 at both ends of the limit groove 2 4 correspond to the second working position and the third working position respectively. When the oil generates a circumferential rotational force on the valve body 2, the limit assembly 5 can simultaneously abut against the groove wall of the limit groove 1 3 and the side wall 4b of the limit groove 2 4, thereby enabling the regulating valve to remain stable in the second working position and the third working position; in the first working position, the oil does not generate a circumferential rotational force on the valve body 2, and the valve body 2 can remain stable without rotating only through the cooperation of the limit assembly 5 and the limit groove 1 3.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A regulating valve, comprising a valve cover (1), on which a valve body (2) is rotatably arranged, characterized in that: The circumferential surface of the valve cover (1) is provided with an assembly hole (1a) facing the valve body (2); a limit assembly (5) is telescopically arranged in the assembly hole (1a) for pressing against the valve body (2); the circumferential surface of the valve body (2) is provided with a plurality of limit grooves (3) capable of cooperating with the limit assembly (5); each limit groove (3) corresponds to an operating position of the regulating valve; when the valve body (2) rotates relative to the valve cover (1) to one of the operating positions, the limit assembly (5) cooperates with the corresponding limit groove (3) at the operating position and is capable of limiting the rotation of the valve cover (1).

2. The regulating valve according to claim 1, characterized in that: The valve cover (1) is provided with an assembly hole (2) (1b) in the axial direction, the valve body (2) comprises an adjustment section (2a) located in the assembly hole (1b), the limit assembly (5) is at least partially located in the assembly hole (1b), and a plurality of limit grooves (3) are provided on the circumferential surface of the adjustment section (2a) at circumferential intervals.

3. The regulating valve according to claim 2, characterized in that: The regulating section (2a) is provided with a limiting groove 2 (4) extending upward in the direction of the rotation path of the valve body (2), and a plurality of limiting grooves 1 (3) are provided on the bottom wall (4a) of the limiting groove 2 (4), wherein two of the limiting grooves 1 (3) are respectively located at the two ends of the limiting groove 2 (4), and the side wall (4b) at the end of the limiting groove 2 (4) and the groove wall of the limiting groove 1 (3) located at the end can contact the limiting assembly (5) at the same time.

4. The regulating valve according to claim 3, characterized in that: Three limiting grooves 1 (3) are provided on the bottom wall (4a) of the limiting groove 2 (4), wherein two limiting grooves 1 (3) are respectively located at the two ends of the limiting groove 2 (4), and one of the limiting grooves 1 (3) is located between the two ends of the limiting groove 2 (4).

5. The regulating valve according to claim 1, 2, 3 or 4, characterized in that: The limiting assembly (5) comprises an elastic member (5a) and a positioning pin (5b), wherein the elastic member (5a) is fixedly arranged in the first assembly hole (1a), one end of the positioning pin (5b) is located in the first assembly hole (1a) and abuts against the elastic member (5a), and the other end is located in the second assembly hole (1b) and can contact the groove wall of the first limiting groove (3) or abut against the bottom wall (4a) of the second limiting groove (4).

6. The regulating valve according to claim 5, characterized in that: The limiting assembly (5) further comprises a blocking wire (5c) threadedly connected to the assembly hole (1a); the blocking wire (5c) is located outside the elastic member (5a) and abuts against the elastic member (5a).

7. The regulating valve according to claim 1, 2, 3 or 4, characterized in that: The valve body (2) further comprises a connecting section (2b) located outside the valve cover (1), a channel 1 (2b1) being provided on an end surface of the connecting section (2b), and a channel 2 (2b2) ​​being provided on an outer peripheral surface of the connecting section (2b), the channel 1 (2b1) and the channel 2 (2b2) ​​being connected.

8. A breaker hammer, characterized in that: The regulating valve comprises the regulating valve as claimed in any one of claims 1 to 7, the breaker comprises a cylinder body (7) on which the regulating valve is installed, the cylinder body (7) is provided with a stroke chamber (8) and a normally high pressure chamber (9), the wall of the stroke chamber (8) is provided with a first flow channel (13) connected to the normally high pressure chamber (9), the wall of the stroke chamber (8) is further provided with an anti-air strike chamber (11) connected to the normally high pressure chamber (9), and the channel 1 (2b1) of the valve body (2) is connected to the anti-air strike chamber (11). The regulating valve has at least two working positions. When the regulating valve is in the first working position, the second channel (2b2) ​​is not in communication with the normally high-pressure chamber (9); when the valve body (2) is in the second working position, the second channel (2b2) ​​is in communication with the normally high-pressure chamber (9), and the oil in the cylinder body (7) flows from the stroke chamber (8) through the first flow channel (13), the normally high-pressure chamber (9), the second channel (2b2), the first channel (2b1) and the air-defense chamber (11) in sequence and then flows back to the stroke chamber (8).

9. The breaker hammer according to claim 8, characterized in that: The cylinder body (7) is also provided with a signal hole cavity (10) which is connected to the air-defense cavity (11). The regulating valve has three working positions. When the valve body (2) is in the third working position, the second channel (2b2) ​​is connected to the signal hole cavity (10). The oil in the cylinder body (7) passes through the air-defense cavity (11), the first channel (2b1), the second channel (2b2) ​​and the signal hole cavity (10) in sequence from the stroke cavity (8).

10. The breaker hammer according to claim 9, characterized in that: The limiting grooves 1 (3) at both ends of the limiting groove 2 (4) correspond to the second working position and the third working position respectively.

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