CN216306364U

CN216306364U - Speed regulating valve for forcible entry device and rescue forcible entry device

Info

Publication number: CN216306364U
Application number: CN202121656576.5U
Authority: CN
Inventors: 胡江平; 周现奇; 周恭维
Original assignee: Changsha Zhongda Intelligent Technology Co ltd
Current assignee: Changsha Zhongda Intelligent Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-04-15
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to a speed regulating valve for a forcible entry device and a rescue forcible entry device. A governing valve for breaking open device includes valve body and case structure. The valve body is provided with a valve hole, an oil inlet and an oil outlet. One end of the valve core structure is rotatably mounted in the valve hole. And an oil passage is formed at one end of the valve core structure, which is positioned in the valve hole. An opening at one end of the oil passing channel is communicated with the oil inlet, and an opening at the other end of the oil passing channel is communicated with the oil outlet. The valve core structure can rotate around the axis of the valve core structure to adjust the communication area between the oil passage and the oil outlet. In the in-service use process, the valve core structure rotates around the central axis of the valve core structure to adjust the communication area between the oil passage and the oil outlet, so that the flow area of a flow path can be adjusted, the rotating speed of the rescue breaking and dismantling device is subjected to stepless speed regulation, the rescue breaking and dismantling device is guaranteed to be capable of breaking more objects with different hardness, and the applicability of the rescue breaking and dismantling device can be effectively improved.

Description

Speed regulating valve for forcible entry device and rescue forcible entry device

Technical Field

The utility model relates to the technical field of speed regulating valves, in particular to a speed regulating valve for a forcible entry device and a rescue forcible entry device.

Background

The forcible entry device is used as forcible entry operation equipment and is mainly applied to emergency rescue. However, the intelligent three-gear speed regulation of the traditional breaking device is suitable for breaking three kinds of objects with different hardness, such as rocks, concrete and the like. However, the situation of the rescue site is usually very complicated, and sudden or unexpected situations exist, so the working condition of the breaking action is more and more complicated, the three-gear speed regulation is difficult to meet the actual requirement of the breaking operation, and the traditional breaking device has poor applicability.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a speed regulating valve for a breaking-in device and a rescue breaking-in device, which can improve the applicability of the breaking-in device, in order to solve the problem that the conventional breaking-in device has poor applicability.

A speed regulating valve for a breaking-in device comprises a valve body and a columnar valve core structure;

the valve body is provided with a valve hole, an oil inlet communicated with the valve hole and an oil outlet communicated with the valve hole;

one end of the valve core structure is rotatably arranged in the valve hole; an oil passage is formed at one end of the valve core structure, which is positioned in the valve hole; an opening at one end of the oil passing channel is communicated with the oil inlet, and an opening at the other end of the oil passing channel is communicated with the oil outlet;

the valve core structure can rotate around the axis of the valve core structure, so that the communication area between the oil passing channel and the oil outlet is adjusted.

In some embodiments, the oil passage comprises a first oil passing hole, a second oil passing hole and a throttling groove;

the valve core structure is a cylindrical structure; the valve core structure is a cylindrical structure; the end face of one end of the valve core structure, which is positioned in the valve hole, is provided with the first oil passing hole communicated with the oil inlet; the throttling groove extending along the circumferential direction of the valve core structure is formed in the outer wall of the valve core structure; a second oil passing hole communicated with the first oil passing hole is formed in the inner wall of one end in the throttling groove; the cross-sectional area of the second oil passing hole is larger than or equal to that of the throttling groove; the cross-sectional area of the throttling groove is gradually reduced along the direction departing from the second oil passing hole;

in the central axis direction of the valve core structure, the size of the oil outlet is larger than or equal to the opening size of the throttling groove; the oil outlet is communicated with the opening of the throttling groove in an aligning way; the valve core structure can rotate around the central axis of the valve core structure in an operating mode so as to adjust the position of the oil outlet on the throttling groove.

In some of the embodiments, the device further comprises a speed regulating gear; the speed regulating gear is sleeved at one end of the valve core structure positioned outside the valve body and is in transmission connection with the valve core structure; the speed regulating gear is used for being meshed with a transmission gear of the driving mechanism so as to drive the valve core structure to rotate.

In some embodiments, the oil passing channel comprises a movable groove, a third oil passing hole and a fourth oil passing hole;

the valve core structure comprises a valve sleeve, a valve block and a speed regulating rod; the end surface of one end of the valve sleeve is provided with the movable groove communicated with the oil inlet; the bottom of the movable groove is provided with a speed regulating through hole penetrating through the valve sleeve; the inner wall of the speed regulation through hole is provided with a spiral guide part along the depth direction of the valve hole; a third oil passing hole which is aligned and communicated with the oil outlet is formed in the side wall of the movable groove;

the valve block can be accommodated in the movable groove in a sliding manner; a fourth oil passing hole penetrating through the valve block is formed in the end face, away from one end of the speed regulating through hole, of the valve block;

the speed regulating rod penetrates through the speed regulating through hole and is matched and connected with the spiral guide part; one end of the speed regulating rod extends into the movable groove and is abutted against the valve block, and the other end of the speed regulating rod is positioned outside the valve body;

the speed regulating rod can rotate around the axis of the speed regulating rod in an operating mode so as to drive the valve block to slide in the movable groove along the axial direction of the speed regulating rod, and therefore the communication area between the third oil passing hole and the movable groove is adjusted.

In some of these embodiments, further comprising a limiter; the limiting piece is arranged at one end of the speed regulating rod, which is positioned in the movable groove;

when the valve block slides to completely shield the opening of the third oil passing hole, the limiting part abuts against the inner wall of the movable groove.

In some of these embodiments, the helical guide is an internal thread formed on the inner wall of the speed regulation through hole; the speed regulating rod is a threaded rod; the speed adjusting rod penetrates through the speed adjusting through hole and is in threaded connection with the internal thread.

In some embodiments, the device further comprises a reset elastic piece; the reset elastic piece is arranged in the valve hole and is used for providing an elastic force for driving the valve block to slide along the direction towards the speed regulation through hole.

In some embodiments, the outer wall of one end of the valve core structure is circumferentially provided with a limit step;

the speed regulating valve for the breaking-in device further comprises an installation sleeve; the mounting sleeve comprises a hollow cylindrical mounting part and a limiting part arranged on the outer wall of one end of the mounting part; one end of the mounting part, which is far away from the limiting part, penetrates through and is mounted in the valve hole; the side wall of the limiting part is abutted against the surface of the valve body, which is provided with the valve hole;

the valve core structure is rotatably arranged in the mounting part in a penetrating way; one end of the valve core structure, which is provided with the limiting step, is positioned in the valve hole, and the other end of the valve core structure is positioned outside the valve body; the installation part is located one end in the valve hole with spacing step butt.

In some embodiments, the device further comprises a first sealing element and a second sealing element; the first sealing element and the second sealing element are annular elastic sealing structures; the first sealing element is sleeved on the valve core structure and sealed between the valve core structure and the inner wall of the mounting part; the second sealing element is sleeved on the mounting part and sealed between the valve body and the limiting part; and/or

The axial locking piece is also included; the axial locking piece is sleeved and installed at one end, located outside the valve body, of the valve core structure and used for axially limiting the installation sleeve.

A rescue breaking-in device comprises the speed regulating valve for the breaking-in device.

The speed regulating valve for the forcible entry device and the rescue forcible entry device are mainly used for regulating the rotating speed of the rescue forcible entry device so as to ensure that the rescue forcible entry device is suitable for different use environments. The oil inlet, cross oil passageway and oil-out and communicate in proper order and can form the circulation route of hydraulic oil in broken speed control valve of tearing open, and in the in-service use process, through making the case structure adjust the area of intercommunication between oil passageway and the oil-out around self axis rotation, can adjust the flow path, carry out stepless speed regulation to the rotational speed of the broken device of tearing open in rescue, can carry out broken work to more objects of different hardness with the broken device of guaranteeing to rescue, thereby can improve the suitability of the broken device of rescuing effectively.

Drawings

FIG. 1 is a schematic structural view of a governor valve for a breaking-in apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a governor valve for a breaking-in apparatus according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a valve body in the speed regulating valve for the breaking-in device shown in FIGS. 1 and 2;

FIG. 4 is a schematic structural view of a valve core structure of the speed regulating valve for the breaking-in device shown in FIG. 1;

FIG. 5 is an enlarged fragmentary view of the speed valve for the demolition apparatus shown in FIG. 2;

fig. 6 is a schematic structural diagram of a valve sleeve in the speed regulating valve for the breaking-in device shown in fig. 2.

Description of reference numerals: 100. a speed regulating valve for the breaking-in device; 110. a valve body; 111. a valve bore; 112. an oil inlet; 113. an oil outlet; 120. a valve core structure; 121. an oil passing channel; 1211. a first oil passing hole; 1212. A second oil passing hole; 1213. a throttling groove; 1214. a movable groove; 1215. a third oil passing hole; 1216. a fourth oil passing hole; 122. a valve housing; 1221. a speed regulation through hole; 123. a valve block; 124. a governor lever; 125. a limiting step; 130. a speed regulating gear; 140. a limiting member; 150. a restoring elastic member; 160. installing a sleeve; 161. An installation part; 162. a limiting part; 170. a first seal member; 180. a second seal member; 190. an axial locking member.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present, unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

The utility model provides a speed regulating valve for a forcible entry device and a rescue forcible entry device. Wherein, broken dismouting is put including the governing valve that is used for broken dismouting to the rescue. From this, a governing valve for breaking open device is used in the broken dismouting of rescue for adjust the rotational speed of the broken device of rescue, can carry out broken work to the object of different hardness with the broken device of assurance rescue.

Fig. 1 and 2 show the structure of a speed control valve for a breaking-in device according to one embodiment and another embodiment of the present invention. For the purpose of illustration, the drawings show only some of the structures associated with embodiments of the utility model.

Referring to fig. 1 and 2, a speed regulating valve 100 for a breaking-in device in a preferred embodiment of the utility model includes a valve body 110 and a valve core structure 120 in a cylindrical shape.

Referring to fig. 3, the valve body 110 is provided with a valve hole 111, an oil inlet 112 communicated with the valve hole 111, and an oil outlet 113 communicated with the valve hole 111.

One end of the valve core structure 120 is rotatably installed in the valve hole 111. An oil passage 121 is formed at one end of the valve core structure 120 located in the valve hole 111. One end opening of the oil passing channel 121 is communicated with the oil inlet 112, and the other end opening is communicated with the oil outlet 113. Therefore, the oil inlet 112, the oil passing channel 121 and the oil outlet 113 are sequentially communicated to form an oil passage of hydraulic oil, and when the oil outlet 113 is communicated with the oil passing channel 121, the oil passage is in a conducting state, and at this time, the speed regulating valve 100 for the breaking-in device is in an open state; when the oil outlet 113 is not communicated with the oil passage 121, the oil passage is in a disconnected state, and the speed regulating valve 100 for the breaking-in device is in a closed state.

The spool structure 120 is operable to rotate on its own axis to adjust the communication area between the oil passage 121 and the oil outlet 113. Therefore, the valve core structure 120 rotates in the valve hole 111, so that the flow of the oil liquid passage can be regulated, and further the stepless speed regulation of the rescue breaking and dismantling device can be realized.

In the rescue process, the speed regulating valve 100 for the breaking-in device is used for carrying out stepless speed regulation on the breaking-in device for rescue, so that the breaking-in device for rescue can be used for breaking more objects with different hardness on site, the breaking-in device for rescue can meet the use requirement of a more complex rescue use environment, and the applicability of the breaking-in device for rescue is improved.

Referring to fig. 1 and 4, in an embodiment of the present invention, the oil passage 121 includes a first oil passing hole 1211, a second oil passing hole 1212, and a throttle groove 1213. Thus, the first oil passing hole 1211, the second oil passing hole 1212, and the throttle groove 1213 are sequentially communicated to form the oil passing passage 121.

The valve core structure 120 is a cylindrical structure. An end surface of the valve core structure 120 located in the valve hole 111 is opened with a first oil passing hole 1211 communicated with the oil inlet 112. The outer wall of the valve core structure 120 is provided with a throttling groove 1213 extending along the circumferential direction thereof. A second oil passing hole 1212 communicating with the first oil passing hole 1211 is formed in an inner wall of one end of the throttle groove 1213. The cross-sectional area of the second oil passing hole 1212 is greater than or equal to the cross-sectional area of the throttle groove 1213. The cross-sectional area of the throttle groove 1213 gradually decreases in a direction away from the second oil passing hole 1212. Thus, the orifice slot 1213 is a tapered slot with a gradually changing flow area.

In the central axis direction of the valve core structure 120, the size of the oil outlet 113 is larger than or equal to the opening size of the throttle groove 1213. The oil outlet 113 is in aligned communication with the opening of the throttle slot 1213. Therefore, the dimension of the oil outlet 113 in the axial direction of the valve core structure 120 is greater than or equal to the dimension of the throttling groove 1213 in the axial direction of the valve core structure 120, so that the condition that the edge of the oil outlet 113 causes resistance to hydraulic oil due to the undersize of the oil outlet 113 when the hydraulic oil in the throttling groove 1213 enters the oil outlet 113 is avoided, and the adjusting precision of the speed regulating valve 100 for the breaking-in device is effectively improved.

The valve core structure 120 rotates around its central axis to adjust the position of the oil outlet 113 on the throttle groove 1213. Since the throttle groove 1213 is a gradual-changing groove with gradually-changing cross-sectional area, the valve core structure 120 is rotated to align and communicate the oil outlet 113 with different positions on the throttle groove 1213, so that the flow rate of the hydraulic oil entering the oil outlet 113 from the throttle groove 1213 can be adjusted, and the adjustment of the communication area between the oil passage 121 and the oil outlet 113, i.e. the stepless speed regulation of the rescue breaking and dismantling device, is realized.

Specifically, the speed valve 100 for a demolition apparatus further includes a speed gear 130. The speed-adjusting gear 130 is sleeved at one end of the valve core structure 120 located outside the valve body 110 and is in transmission connection with the valve core structure 120. The speed regulating gear 130 is used for meshing with a transmission gear of the driving mechanism so as to drive the valve core structure 120 to rotate. Therefore, the power provided by the driving mechanism is transmitted to the valve core structure 120 through the transmission gear and the speed regulating gear 130 which are meshed with each other, so as to provide power for the rotation of the valve core structure 120. In the processing process of the speed regulating valve 100 for the forcible entry device, the speed regulating gear 130 and the transmission gear with different transmission ratios are selected to realize the regulation of the rotating speed of the valve core structure 120, so that the speed regulating valve 100 for the forcible entry device with different speed regulating precisions can be obtained, and therefore, in the processing process of the forcible entry device, the rescue forcible entry devices with different specifications, models and use occasions can select the speed regulating valve 100 for the forcible entry device with different speed regulating precisions, so as to ensure that the rescue forcible entry device has higher use performance.

Referring to fig. 2 and 5, in another embodiment of the present invention, the oil passing passage 121 includes a movable groove 1214, a third oil passing hole 1215 and a fourth oil passing hole 1216. Thus, the fourth oil passing hole 1216, the movable groove 1214, and the third oil passing hole 1215 sequentially communicate to form the oil passing passage 121.

The valve core structure 120 includes a valve sleeve 122, a valve block 123, and a governor lever 124. Referring to fig. 6, an end surface of one end of the valve housing 122 is provided with a movable groove 1214 communicating with the oil inlet 112. The bottom of the movable groove 1214 is opened with a speed-adjusting through-hole 1221 penetrating the valve housing 122. The inner wall of the speed regulating through hole 1221 is formed with a spiral guide portion (not shown) in the depth direction of the valve hole 111. The side wall of the movable groove 1214 is opened with a third oil passing hole 1215 communicated with the oil outlet 113 in alignment. The spiral guide portion may be a spiral groove formed by recessing the inner wall of the speed regulation through hole 1221, a spiral guide rail structure formed on the inner wall of the speed regulation through hole 1221, a threaded hole formed in the inner wall of the speed regulation through hole 1221, or the like.

The valve block 123 is slidably received within the movable channel 1214. The end surface of the valve block 123 facing away from the speed regulation through hole 1221 is opened with a fourth oil passing hole 1216 penetrating through the valve block 123. The central axis of the fourth oil passing hole 1216 may be parallel to the central axis of the governor lever 124, or may intersect the central axis of the governor lever 124. Specifically, in the present embodiment, the central axis of the fourth oil passing hole 1216 is parallel to the central axis of the governor lever 124.

The speed adjusting rod 124 is inserted into the speed adjusting through hole 1221 and is coupled to the spiral guide portion. The governor lever 124 has one end that extends into the movable groove 1214 and abuts against the valve block 123 and the other end that is located outside the valve body 110. The governor lever 124 is operable to rotate on its own axis to slide the valve block 123 in the axial direction of the governor lever 124 within the movable pocket 1214 to adjust the communication area between the third oil passing hole 1215 and the movable pocket 1214.

When the speed adjusting rod 124 rotates under the action of external force, the speed adjusting rod 124 is matched with the spiral guide part, and at the moment, the speed adjusting rod 124 moves relative to the valve sleeve 122 along the axial direction of the speed adjusting rod to drive the valve block 123 to slide in the movable groove 1214 until the valve block 123 completely shields, partially shields or completely opens the opening of the third oil passing hole 1215, so that the flow area in the oil passing channel 121 can be adjusted, the communication area between the oil passing channel 121 and the oil outlet 113 can be adjusted, and the stepless speed adjustment of the rescue breaking and dismantling device can be realized.

Specifically, the speed valve 100 for a demolition apparatus further includes a limit stop 140. The limiting member 140 is disposed at an end of the speed lever 124 located in the movable slot 1214. The valve block 123 slides to completely block the opening of the third oil passing hole 1215. The limiting member 140 abuts against the inner wall of the movable slot 1214.

The position-limiting member 140 may be a block structure or a strip structure disposed on the surface of the speed-adjusting lever 124, or an annular structure sleeved and fixed on the speed-adjusting lever 124. In practical application, the speed-adjusting lever 124 rotates to cooperate with the spiral guide portion, so that the speed-adjusting lever 124 can move in the depth direction of the valve hole 111, and the limiting member 140 abuts against the bottom wall of the movable groove 1214, so that the movement of the speed-adjusting lever 124 in the opening direction of the valve hole 111 can be limited. Therefore, the stopper 140 prevents the speed control rod 124 from excessively moving in the valve hole 111 and being removed from the valve hole 111, and the reliability of the speed control valve 100 for the breaking-in device is greatly improved.

Specifically, the spiral guide portion is an internal thread formed on the inner wall of the speed regulation through hole 1221. The governor lever 124 is a threaded rod. The speed adjusting rod 124 is arranged in the speed adjusting through hole 1221 in a penetrating mode and is in threaded connection with the internal threads. Therefore, when the flow of the speed regulating valve 100 for the breaking-in device needs to be regulated, the valve block 123 can be driven to move in the movable groove 1214 only by screwing the speed regulating rod 124, so that the communication area between the oil passing channel 121 and the oil outlet 113 is realized. Therefore, providing the spiral guide portion as an internal thread and the governor lever 124 as a threaded rod makes the governor valve 100 for a breaking-down device simpler in speed governing operation.

Specifically, the speed valve 100 for a demolition apparatus further includes a return spring 150. The return elastic member 150 is installed in the valve hole 111 and serves to provide an elastic force for urging the valve block 123 to slide in a direction toward the speed adjusting through hole 1221. Wherein, the elastic reset piece can be a metal elastic piece, a compression spring, a rubber band and the like. When the speed adjusting rod 124 rotates and is matched with the spiral guide part, so that the speed adjusting rod 124 moves along the direction departing from the valve block 123, the valve block 123 moves along the direction departing from the valve block 123 along with the speed adjusting rod 124 under the action of the elastic force provided by the reset elastic piece 150, and therefore, the reset elastic piece 150 is arranged, so that the speed adjusting rod 124 is not connected with the valve block 123, the valve block 123 and the speed adjusting rod 124 are always in a butting state, and the valve block 123 can be guaranteed to effectively slide in the movable groove 1214. The elastic member 150 is reset, so that the speed regulating rod 124 only needs to be in contact with the valve block 123, and does not need to be connected with each other, thereby greatly simplifying the processing process of the speed regulating valve 100 for the forcible entry device.

Referring again to fig. 1, 2 and 4, in some embodiments, the outer wall of the valve core structure 120 at one end is formed with a limit step 125 along the circumferential direction.

The governor valve 100 for a demolition arrangement also includes a mounting sleeve 160. The mounting sleeve 160 includes a hollow cylindrical mounting portion 161 and a stopper portion 162 provided on an outer wall of one end of the mounting portion 161. One end of the mounting portion 161 away from the stopper portion 162 is inserted into the valve hole 111 and mounted therein. The side wall of the limiting portion 162 abuts against the surface of the valve body 110 with the valve hole 111. The valve body structure 120 is rotatably inserted into the mounting portion 161. One end of the valve core structure 120, at which the limit step 125 is formed, is located inside the valve hole 111, and the other end is located outside the valve body 110. The end of the mounting portion 161 away from the stopper portion 162 abuts the stopper step 125. The mounting portion 161 may be connected to an inner wall of the valve hole 111 by means of snap-fit, screw-connection, or the like. Specifically, in the present embodiment, the mounting portion 161 is inserted through and screwed into the valve hole 111.

The arrangement of the limiting portion 162 can limit the installation depth of the installation sleeve 160 in the valve hole 111, and the installation portion 161 abuts against the limiting step 125 to limit the installation depth of the valve core structure 120 in the valve hole 111, so that the alignment effect of the oil passage 121 and the oil outlet 113 can be ensured, and the improvement of the processing precision of the speed regulating valve 100 for the breaking and dismantling device is facilitated.

It should be noted that, in an embodiment of the present invention, when the valve core structure 120 is a cylindrical structure, the limit step 125 is a shaft shoulder formed on the valve core structure 120, and the valve core structure 120 is a stepped shaft; in yet another embodiment of the present invention, when the valve core structure 120 includes a governor lever 124, a valve block 123 and a valve sleeve 122, a limit step 125 is formed between an end surface of the valve sleeve 122 facing an opening end of the valve hole 111 and a surface of the governor lever 124.

Further, in some embodiments, the speed valve 100 for a demolition device further includes a first seal 170 and a second seal 180. The first seal 170 and the second seal 180 are both annular elastic seal structures. The first sealing member 170 is sleeved on the valve core structure 120 and seals between the valve core structure 120 and the inner wall of the mounting portion 161. The second sealing member 180 is sleeved on the mounting portion 161 and seals between the valve body 110 and the limiting portion 162. Therefore, the arrangement of the first sealing element 170 and the second sealing element 180 effectively improves the sealing performance of the speed regulating valve 100 for the breaking-in device, greatly reduces the probability that external dust, water and the like enter the valve hole 111 through the joint between the valve core structure 120 and the mounting part 161 or the joint between the mounting part 161 and the valve body 110, and greatly improves the use performance of the speed regulating valve 100 for the breaking-in device.

Further, in some embodiments, the speed valve 100 for a demolition device further includes an axial lock 190. The axial locking member 190 is sleeved and mounted at one end of the valve core structure 120 located outside the valve body 110, and is used for axially limiting the mounting sleeve 160. The axial locking member 190 may be a single part or an assembly of multiple parts, such as a lock nut and a lock washer.

The axial locking piece 190 is mainly used for axially limiting and locking the mounting sleeve 160, so that the probability that the mounting sleeve 160 and the valve core structure 120 are loosened after being used for a long time to influence the alignment precision between the oil passage 121 and the oil outlet 113 is reduced, and the use reliability of the speed regulating valve 100 for the breaking-in device is greatly improved.

It should be noted that, when the valve core structure 120 is a cylindrical structure, the limiting portion 162 is located between the speed regulation gear 130 and the valve body 110, and at this time, the axial locking member 190 is located on one side of the speed regulation gear 130, which is away from the limiting portion 162, and is used for axially limiting the speed regulation gear 130 and the mounting sleeve 160; when the valve core structure 120 includes the governor lever 124, the valve block 123 and the valve housing 122, the axial locking member 190 is located on a side of the limiting portion 162 facing away from the valve housing 122 for axially limiting the mounting sleeve 160 and the valve housing 122.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A speed regulating valve for a breaking-in device is characterized by comprising a valve body and a columnar valve core structure;

2. The governor valve for a breaking and disconnecting device according to claim 1, wherein the oil passage comprises a first oil passing hole, a second oil passing hole and a throttling groove;

3. A speed valve for a demolition apparatus as defined in claim 2 further comprising a speed gear; the speed regulating gear is sleeved at one end of the valve core structure positioned outside the valve body and is in transmission connection with the valve core structure; the speed regulating gear is used for being meshed with a transmission gear of the driving mechanism so as to drive the valve core structure to rotate.

4. The governor valve for a demolition apparatus according to claim 1, wherein the oil passage includes a movable groove, a third oil passing hole, and a fourth oil passing hole;

5. A speed valve for a demolition device according to claim 4 further comprising a limit stop; the limiting piece is arranged at one end of the speed regulating rod, which is positioned in the movable groove;

6. The speed valve for a demolition device according to claim 4 wherein the spiral guide is an internal thread formed on an inner wall of the speed through hole; the speed regulating rod is a threaded rod; the speed adjusting rod penetrates through the speed adjusting through hole and is in threaded connection with the internal thread.

7. A speed valve for a demolition device as defined in claim 4 further comprising a return spring; the reset elastic piece is arranged in the valve hole and is used for providing an elastic force for driving the valve block to slide along the direction towards the speed regulation through hole.

8. The governor valve for a breaking and disconnecting device according to claim 1, wherein the outer wall of one end of the spool structure is circumferentially formed with a limit step;

9. The governor valve for a demolition apparatus of claim 8, further comprising a first seal and a second seal; the first sealing element and the second sealing element are annular elastic sealing structures; the first sealing element is sleeved on the valve core structure and sealed between the valve core structure and the inner wall of the mounting part; the second sealing element is sleeved on the mounting part and sealed between the valve body and the limiting part; and/or

10. A rescue breaking device comprising a speed valve for a breaking device as claimed in any one of claims 1 to 9.