Damage-prevention flat pressing pipe
By designing the buffer components and isolation components of the anti-loss flat pressure pipe, the damage problem of sand and gravel on the top cover flat pressure pipe under high head operation is solved, and the effect of reducing damage, optimizing force leakage function and extending service life is achieved.
Patent Information
- Application Number
- CN202421233076.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The high head operation has a high impact on the flat pressure pipe of the top cover, resulting in sand and gravel impacts causing problems such as sand holes, cracks and weld cracks, affecting the safe and stable operation of the unit.
A loss-proof flat pressure tube is designed, including a buffer assembly and an isolation assembly. The buffer assembly consists of a flat press tube, a sleeve, a first elastic member and a sliding rod. The isolation assembly is an anti-collision net. By indirectly connecting the anti-collision net and the flat press tube, the direct impact of sand and gravel on the flat press tube is reduced.
It effectively reduces the damage to the flat pressure pipe by sand and gravel, optimizes the force leakage function of the anti-collision net, extends the service life of the flat pressure pipe, and improves the safety of the unit.
Smart Images
Figure CN222687666U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of damage prevention of equalizing tubes, in particular to an anti-damage equalizing tube. Background Art
[0002] In order to reduce the axial water thrust, large-scale hydro-generator sets usually have several top cover surge pipes installed in the top cover. In order to reduce the impact of factors such as vibration and temperature changes on the pipeline, the top cover surge pipe is connected to the buried pipe in the machine pit lining through a bellows expansion joint or a stainless steel expansion joint.
[0003] With the continuous innovation of hydropower technology, high-head operation technology at home and abroad has become very mature. High head also puts a test on the top cover surge pipe. It is well known that the greater the head, the greater the volute inlet pressure, and the greater the impact on the top cover surge pipe. However, during the operation of the unit, it is inevitable that sand and gravel will enter the top cover surge pipe and impact the inside of the surge pipe. Long-term impact will cause sand holes, cracks, and even weld cracks in the surge pipe. If the leak is not discovered in time, there may be a risk of flooding the plant. At present, many power stations have cracks and leakage, which seriously affects the safe and stable operation of the unit. Utility Model Content
[0004] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.
[0005] In view of the above-mentioned prior art problems, the present utility model is proposed.
[0006] The utility model aims to provide a damage-proof pressure-squeeze pipe, and aims to solve the damage of sand and stone to the top cover pressure-squeeze pipe.
[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an anti-damage pressure-equalizing tube, comprising a buffer assembly, including a pressure-equalizing tube, a sleeve arranged on the inner wall of the pressure-equalizing tube, a first elastic member arranged inside the sleeve, and a sliding rod arranged inside the sleeve;
[0008] The isolation component is an anti-collision net arranged inside the equalizing tube.
[0009] As a preferred solution of the anti-damage flat-pressure tube of the utility model, wherein: a first slide groove and a second slide groove are provided inside the sleeve, the slide rod passes through the second slide groove and extends to the first slide groove, and a pressure plate is connected to one end close to the first slide groove.
[0010] As a preferred solution of the damage-proof equalizing tube of the utility model, wherein: the inner wall of the first slide groove is provided with an internal thread, and the inner wall of the equalizing tube is provided with bolts.
[0011] As a preferred solution of the anti-damage equalizing tube of the utility model, the anti-collision net includes a first anti-collision net and a second anti-collision net, the surface of the first anti-collision net is provided with a slide rail, and the surface of the second anti-collision net is provided with a slider that can slide along the inner wall of the slide rail.
[0012] As a preferred solution of the utility model anti-damage flat-pressure tube, wherein: the end of the sliding rod away from the pressure plate is provided with a conical platform, the anti-collision net is provided with a ball head inside, and a limit rod is slidably provided inside the ball head.
[0013] As a preferred solution of the damage-proof equalizing tube of the utility model, the outer wall of the conical platform is provided with a first inclined surface.
[0014] As a preferred solution of the damage-proof equalizing tube of the utility model, wherein: a first movable channel is penetrated through the ball head, and the first movable channel can allow the conical platform to slide.
[0015] As a preferred solution of the damage-proof equalizing tube of the utility model, an annular groove is provided inside the anti-collision net, and the annular groove provides space for the extension and retraction of the limiting rod.
[0016] As a preferred solution of the damage-proof equalizing tube of the utility model, the ball head outer wall array is provided with a second movable channel for the limiting rod to slide, and the second movable channel is connected to the first movable channel.
[0017] A round ball is arranged at one end of the limiting rod close to the outside.
[0018] As a preferred solution of the damage-proof equalizing tube of the utility model, a second elastic member is provided inside the second movable channel, one end of the second elastic member is connected to the inner wall of the second movable channel, and the other end is connected to the outer wall of the limiting rod.
[0019] The beneficial effect of the damage-proof equalizing pipe of the utility model is as follows: the anti-collision net and the equalizing pipe are indirectly connected, which can not only reduce the damage of sand and gravel to the equalizing pipe, but also facilitate the installation of the anti-collision net 201, replacing the original fixed installation method, further optimizing the force release function of the anti-collision net, and effectively ensuring the service life of the equalizing pipe and the safety of the overall unit operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:
[0021] Figure 1It is a cross-sectional schematic diagram of the equalizing and pressure pipe in the utility model.
[0022] Figure 2 It is a cross-sectional schematic diagram of the connection structure between the equalizing tube and the anti-collision net in the utility model.
[0023] Figure 3 It is a schematic diagram of the ball head and accessories structure in the utility model.
[0024] Figure 4 It is a schematic diagram of the anti-collision net structure in the utility model. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.
[0028] Example 1
[0029] Reference Figures 1 to 3 , which is the first embodiment of the utility model, and provides an anti-damage pressure-scaling tube, including a buffer assembly 100, including a pressure-scaling tube 101, a sleeve 102 arranged on the inner wall of the pressure-scaling tube 101, a first elastic member 103 arranged inside the sleeve 102, and a sliding rod 104 arranged inside the sleeve 102;
[0030] The isolation assembly 100 includes an anti-collision net 201 disposed inside the equalizing tube 101 .
[0031] Among them, a sleeve 102 is fixed on the inner wall of the equalizing tube 101, and a first elastic member 103 is fixedly installed at the bottom of the sleeve 102, and the first elastic member is a compression spring. A sliding rod 104 is fixedly installed at the other end of the first elastic member 103, and the sliding rod 104 extends out of the sleeve 102. An anti-collision net 201 is fixedly installed at one end of the sliding rod 104 extending out of the sleeve 102, and both ends of the anti-collision net 201 are connected to the equalizing tube 101 in this way; it should be noted that the inner diameter of the sleeve 102 is larger than the radius of the sliding rod 104, and the gap formed between the inner wall of the sleeve 102 and the outer wall of the sliding rod 104 has a limiting effect on the water flow when the sliding rod 104 slides; at the same time, the anti-collision net 201 is penetrated with fine holes. When the anti-collision net 201 moves, water flows through the fine holes, which can act as a resistance to the anti-collision net 201, and cooperate with the first elastic member 103 to play a buffering role.
[0032] In summary, when the sand and gravel in the internal water flow hits the inner wall of the equalizing tube 101, the sand and gravel will be intercepted by the anti-collision net 201 and will not directly hit the inner wall of the equalizing tube 101; at the same time, if the water flow is too large and the impact force of the sand and gravel is relatively large, at this time, the sand and gravel hit the anti-collision net 201, and the anti-collision net 201 will transmit the force to the first elastic member, at this time the slide bar 104 will push the water flow inward, and the water flow will flow from the gap between the slide bar 104 and the inner wall of the sleeve 102; if the impact force is large, then the slide bar 104 will 104 slides fast. At this time, the flow rate of water between the slide bar 104 and the sleeve 102 cannot reach the speed of the slide bar 104. At the same time, the fine holes on the surface of the anti-collision net 201 act as resistance to the slide bar 104, which can reduce the instantaneous deformation distance of the spring. Similarly, when the spring releases potential energy, if the spring potential energy is large and the speed of pushing the anti-collision net 201 is too fast, the fine holes on the surface of the anti-collision net 201 cannot keep up with the water flow pushed by the anti-collision net 201, which will act as resistance. The advantage of such a design is that it can avoid the sand and gravel directly hitting the equalizing tube 101 and causing damage to the inner wall, and can adaptively adjust the movement speed of the anti-collision net 201 according to the impact force of the sand and gravel, release the force of the sand and gravel, and prevent the sand and gravel from damaging the anti-collision net 201.
[0033] Example 2
[0034] Reference Figures 1 to 4 , which is the second embodiment of the utility model, in order to better install the anti-collision net 201, a further optimized solution is provided, including a first slide groove 102a and a second slide groove 102b are provided inside the sleeve 102, the slide rod 104 passes through the second slide groove 102b and extends to the first slide groove 102a, and a pressure plate 105 is connected to one end close to the first slide groove 102a.
[0035] An internal thread 102 a - 1 is provided on the inner wall of the first slide groove 102 a , and a bolt 106 is provided on the inner wall of the equalizing tube 101 .
[0036] Among them, there is a cylindrical first slide groove 102a at the bottom of the sleeve 102, and the second slide groove 102b is also cylindrical, and its radius is smaller than the first slide groove 102a, and the second slide groove 102b connects the first slide groove 102a with the outside of the sleeve 102; the radius of the slide column 104 is smaller than the radius of the second slide groove 102b. The advantage of this design is that the place where the sleeve 102 exchanges water flow with the outside is equivalent to installing an interception plate, which cooperates with the pressure plate 105 to better utilize the water flow to release the force of the anti-collision net 201; the internal thread 102a-1 on the inner wall of the first slide groove 102a is adapted to the thread on the outer wall of the bolt 106, so that it only needs to fix the bolt 106 on the inner wall of the equalizing tube 101, and other parts are installed manually, replacing the direct welding installation method, which saves labor and avoids the anti-collision net 201 without force release caused by welding.
[0037] The anti-collision net 201 includes a first anti-collision net 201a and a second anti-collision net 201b. The first anti-collision net 201a is provided with a slide rail 201a-1 on its surface, and the second anti-collision net 201b is provided with a slider 201b-1 that can slide along the inner wall of the slide rail 201a-1 on its surface.
[0038] The anti-collision net 201 is divided into a first anti-collision net 201a and a second anti-collision net 201b. The structures of the two anti-collision nets are both semicircular. A strip-shaped slide rail 201a-1 is provided on the lower surface of the first anti-collision net 201a. The second anti-collision net 201b has a slider 201b-1 that can slide along the slide rail 201a-1. When installing, the first anti-collision net 201a is lifted up. During this process, the first anti-collision net 201a pushes the slide bar 104. At the same time, the slide bar 104 squeezes the first elastic member 103. Subsequently, the second anti-collision net 201b slides along the slide rail 201a-1. When the second anti-collision net 201b is aligned with the slide bar 104 on the lower surface of the equalizing pipe 101, the operator can release the anti-collision net. At this time, the first elastic member 103 releases potential energy, the two anti-collision nets begin to collide, and the anti-collision net is successfully installed. The advantage of such installation is that when sand and gravel hit a certain part of the anti-collision net, since the anti-collision net 201 and the slide bar 104 are not fixedly installed, the anti-collision net 201 will tilt when it is hit, thus avoiding the anti-collision net 201 driving the slide bar 104 to deviate, and the slide bar 104 rubs against the sleeve 102, thereby reducing the force release effect.
[0039] Example 3
[0040] Reference Figures 1 to 4, which is the third embodiment of the utility model, and this embodiment further provides an anti-damage equalizing tube; in order to prevent the long-term impact of sand and gravel on the anti-collision net 201, causing the position of the anti-collision net 201 to shift, the solution is further optimized; including: a conical platform 107 is provided at one end of the sliding rod 104 away from the pressure plate 105, a ball head 202 is provided inside the anti-collision net 201, and a limit rod 203 is provided inside the ball head 202 for sliding.
[0041] The outer wall of the conical platform 107 is provided with a first inclined surface 107 a.
[0042] Among them, a conical platform 107 is fixedly installed at one end of the sliding rod 104 close to the outside of the sleeve 102, and the outer wall of the conical platform 107 has a first inclined surface 107a to form a body column, and the outward radius of the conical platform 107 is constantly decreasing; a ball head 202 is fixed inside the anti-collision net 201, and a limiting rod 203 is slidably installed on the outer wall of the ball head 202, and the other end of the limiting rod 203 can slide along the outer wall of the conical platform 107. When installing, the ball head 202 inside the anti-collision net 201 is pushed toward the conical platform 107. As the radius of the conical platform 107 toward the inside of the sleeve 102 continues to increase, the limiting rod 203 will connect the anti-collision net 201 with the equalizing tube 101; the advantage of such a connection is that when the anti-collision net 201 is hit, the anti-collision net 201 may deflect in a certain way, but due to the limitation of the conical platform 107, the anti-collision net 201 will not slide.
[0043] A first movable channel 202 a is formed through the ball head 202 , and the first movable channel 202 a allows the conical platform 107 to slide.
[0044] An annular groove 201 c is provided inside the anti-collision net 201 , and the annular groove 201 c provides space for the limiting rod 203 to extend and retract.
[0045] When the anti-collision net 201 is hit, the anti-collision net 201 moves toward the direction of the sleeve 102. At this time, due to the increasing radius of the conical platform 107, the limiting rod 203 moves outward more and more. The annular groove 201c here provides a movable space for the limiting rod 203; the first movable channel 202a is provided to enable the limiting rod 203 to move without affecting the movement of the conical platform 107 when the anti-collision net 201 is tilted.
[0046] The outer wall array of the ball head 202 is provided with a second movable channel 202b for the limiting rod 203 to slide, and the second movable channel 202b is connected to the first movable channel 202a.
[0047] A ball 203a is disposed at one end of the limiting rod 203 close to the outside.
[0048] A first movable channel 202a is arranged in an array on the outer wall of the ball head 202 . The first movable channel 202a provides a sliding track for the limiting rod 203 . A round ball 203a is fixedly mounted on one end of the limiting rod 203 close to the outside.
[0049] A second elastic member is disposed inside the second movable channel 202 b , one end of the second elastic member is connected to the inner wall of the second movable channel 202 b , and the other end of the second elastic member is connected to the outer wall of the limiting rod 203 .
[0050] Among them, the second elastic member is a compression spring. When installing the anti-collision net 201, the ball 203a will first contact the inner wall of the first movable channel 202a, and the other end of the limit rod 203 will contact the surface of the conical platform 107, and then push the conical platform 107 to squeeze the first elastic member 103. When the ball 203a reaches the annular groove 201c, the second elastic member releases potential energy, and the limit rod 203 enters the annular groove 201c. It should be noted that in this scheme, when the first elastic member 103 and the second elastic member are at the same distance, the potential energy of the first elastic member 103 is greater; at the same time, the main function of the first elastic member 103 here is not to cooperate with the water flow to release force, but to facilitate the installation of the anti-collision net 201.
[0051] When the anti-collision net 201 is hit, since the anti-collision net 201 and the sliding rod 104 are not fixedly connected, the anti-collision net 201 will not drive the sliding rod 104 to deflect when it deflects, resulting in contact friction between the sliding rod 104 and the sleeve 102, affecting the force release effect; when the anti-collision net 201 is offset, the limit rod 203 can adaptively adjust the position of different limit rods 203 on the outer surface of the conical platform 107 according to the offset of different angles. In this process, different limit rods 203 will drive different second elastic parts to move, and cooperate with the fine holes on the surface of the anti-collision net 201 to release the force of the sand and gravel impact. After the impact, the second elastic part can lower the limit rod 203 to reset, and the anti-collision net 201 will not slide after long-term use.
[0052] The advantage of this solution is that the anti-collision net 201 is indirectly connected to the equalizing pipe 101, which can not only reduce the damage of sand and gravel to the equalizing pipe 101, but also facilitate the installation of the anti-collision net 201, replacing the original fixed installation method, further optimizing the force release function of the anti-collision net 201, and effectively ensuring the service life of the equalizing pipe 101 and the safety of the overall unit operation.
[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values (e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.
[0054] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.
[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.
[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A damage-resistant flat-pressure pipe, characterized in that: include, A buffer assembly (100) comprises a pressure-equalizing tube (101), a sleeve (102) arranged on the inner wall of the pressure-equalizing tube (101), a first elastic member (103) arranged inside the sleeve (102), and a sliding rod (104) arranged inside the sleeve (102); The isolation component (200) is an anti-collision net (201) arranged inside the equalizing tube (101).
2. The damage-resistant pressure-resistant tube according to claim 1, characterized in that: A first slide groove (102a) and a second slide groove (102b) are provided inside the sleeve (102); the slide rod (104) passes through the second slide groove (102b) and extends to the first slide groove (102a); and a pressure plate (105) is connected to one end close to the first slide groove (102a).
3. The damage-resistant pressure-resistant tube according to claim 2, characterized in that: The inner wall of the first slide groove (102a) is provided with an internal thread (102a-1), and the inner wall of the equalizing tube (101) is provided with a bolt (106).
4. The damage-resistant pressure-resistant tube according to claim 3, characterized in that: The anti-collision net (201) comprises a first anti-collision net (201a) and a second anti-collision net (201b); a slide rail (201a-1) is provided on the surface of the first anti-collision net (201a); and a slide block (201b-1) is provided on the surface of the second anti-collision net (201b) which can slide along the inner wall of the slide rail (201a-1).
5. The damage-resistant pressure-resistant tube according to claim 1, characterized in that: A conical platform (107) is provided at one end of the slide bar (104) away from the pressure plate (105), a ball head (202) is provided inside the anti-collision net (201), and a limit rod (203) is slidably provided inside the ball head (202).
6. The damage-resistant pressure-resistant tube according to claim 5, characterized in that: The outer wall of the conical platform (107) is provided with a first inclined surface (107a).
7. The damage-resistant pressure-resistant tube according to claim 6, characterized in that: The ball head (202) is provided with a first movable channel (202a) running through it, and the first movable channel (202a) allows the conical platform (107) to slide.
8. The damage-resistant pressure-resistant tube according to claim 7, characterized in that: An annular groove (201c) is provided inside the anti-collision net (201), and the annular groove (201c) provides space for the limiting rod (203) to be extended and retracted.
9. The damage-resistant pressure-resistant tube according to claim 7, characterized in that: The outer wall array of the ball head (202) is provided with a second movable channel (202b) for the limiting rod (203) to slide, and the second movable channel (202b) is connected to the first movable channel (202a); A round ball (203a) is provided at one end of the limiting rod (203) close to the outside.
10. The damage-resistant pressure-resistant tube according to claim 9, characterized in that: A second elastic member is provided inside the second movable channel (202b), one end of the second elastic member is connected to the inner wall of the second movable channel (202b), and the other end is connected to the outer wall of the limiting rod (203).