Rock wool fiber forming centrifugal machine

By installing an adjustment device on the centrifugal roller and manually moving the connecting sleeve to cover the wear area, the problem of short service life of the centrifugal roller is solved and the effect of extending the service life is achieved.

CN222454858UActive Publication Date: 2025-02-11CHANGZHOU YINGLAI MACHINERY
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Patent Information

Application Number
CN202421270689.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-05
Publication Date
2025-02-11
Estimated Expiration
2034-06-05

AI Technical Summary

Technical Problem

The service life of centrifugal rollers is not long, mainly due to wear due to long-term contact with the melted rocks after high temperatures.

Method used

An adjustment device is designed, including a connecting sleeve, a rectangular rod, a limiting rod and a spring. By manually controlling the connecting sleeve to move on the surface of the centrifugal roller, covering the wear area, ensuring that the connecting sleeve rotates with the rotation of the centrifugal roller and extends its service life.

Benefits of technology

It effectively extends the service life of the centrifugal roller, and reduces the wear process by covering the wear area, improving the reliability and efficiency of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a rock wool fiber forming centrifugal machine, which relates to the technical field of centrifugal machines, and comprises a support frame, one side of the support frame is uniformly and fixedly connected with motors, the output ends of the motors are fixedly connected with centrifugal rollers, one side of each centrifugal roller is provided with an air ring, one side of each air ring is uniformly and fixedly connected with air outlets, and the other side of each air ring is provided with a fan. An adjusting device is arranged at one end of the centrifugal roller, a collecting device is arranged on one side of the supporting frame, the adjusting device comprises a connecting sleeve, the connecting sleeve is slidably arranged on the surface of the centrifugal roller in a sleeving mode, when the adjusting device is used, the connecting sleeve is manually controlled to move on the surface of the centrifugal roller, and therefore when the middle of the centrifugal roller is abraded, the collecting device can be automatically adjusted. The connecting sleeve is manually arranged on the surface of the centrifugal roller in a sleeving mode, then the abraded position can be covered, it can be guaranteed that the connecting sleeve can rotate along with rotation of the centrifugal roller through the rectangular rod, and therefore the service life of the centrifugal roller can be prolonged to a certain degree.
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Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a rock wool fiberizing centrifuge. Background Art

[0002] A centrifuge is a device used in the production of rock wool. When using a centrifuge, the rock is first melted at high temperature in a melting furnace, and then the melted raw material is poured onto the top of the centrifugal roller. The surface of the centrifugal roller is then cooled and fiberized by the rotation of the centrifugal roller, and then fixed into shape by subsequent felt boards. In this way, it can be well processed into fire-proof and energy-saving thermal insulation materials.

[0003] The inventors have found in daily life that the centrifuge still has at least the following problems: when the centrifuge is used, the rock melted at high temperature will be set on the centrifugal roller, and then rock wool will be formed through the rotation of the centrifugal roller. However, in actual use, due to long-term contact with the rock melted at high temperature, and the discharge port of the melted rock is fixed, the melted rock is set in the middle of the centrifugal roller, and a certain degree of wear will occur in the middle of the centrifugal roller, which makes the service life of the centrifugal roller short. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the service life of the centrifugal roller is not long.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a rock wool fiberizing centrifuge, including a support frame, one side of the support frame is evenly fixedly connected with a motor, the output end of the motor is fixedly connected with a centrifugal roller, one side of the centrifugal roller is provided with an air ring, one side of the air ring is evenly fixedly connected with an air outlet, one end of the centrifugal roller is provided with an adjustment device, one side of the support frame is provided with a collecting device, the adjustment device includes a connecting sleeve, the connecting sleeve is slidably sleeved on the surface of the centrifugal roller, one side of the connecting sleeve is fixedly connected with a rectangular rod, and one side of the rectangular rod is slidably inserted on the surface of the connecting sleeve.

[0006] The effect achieved by the above components is: when the adjusting device is used, the connecting sleeve is manually controlled to move on the surface of the centrifugal roller, and when the middle of the centrifugal roller is worn, the connecting sleeve is manually placed on the surface of the centrifugal roller to cover the worn area, wherein the rectangular rod can ensure that the connecting sleeve can rotate with the rotation of the centrifugal roller, which can extend the service life of the centrifugal roller to a certain extent.

[0007] Preferably, a limit rod is slidably inserted through one side of the connecting sleeve, a circular plate is fixedly connected to the surface of the limit rod, a first spring is sleeved on the surface of the limit rod, one end of the first spring is fixedly connected to one side of the centrifugal roller, and one end of the first spring close to the limit rod is fixedly connected to one side of the circular plate.

[0008] The effect achieved by the above components is that when the connecting sleeve is manually controlled to move on the surface of the centrifugal roller, the first spring is compressed, thereby causing the connecting sleeve to slide on the surface of the limiting rod.

[0009] Preferably, the surface of the limiting rod is evenly provided with locking grooves, the inner wall of the locking groove is provided with a locking block, one side of the locking block is fixedly connected with a round rod, and the round rod is rotatably inserted through one side of the connecting sleeve.

[0010] The effect achieved by the above components is: when the connecting sleeve is slid to a suitable position, the round rod is manually controlled to rotate on the surface of the connecting sleeve, so that the positioning block slides into the inside of the positioning groove, so that the connecting sleeve can be well fixed on the surface of the limiting rod.

[0011] Preferably, fixing holes are evenly opened on one side of the connecting sleeve, and a fixing rod is slidably connected to the inner wall of the fixing hole. A connecting plate is sleeved on the surface of the fixing rod, and the connecting plate is fixedly connected to one end of the round rod. A second spring is sleeved on the surface of the fixing rod, and one end of the second spring is fixedly connected to one end of the fixing rod, and one end of the second spring close to the fixing rod is fixedly connected to one side of the connecting plate.

[0012] The effect achieved by the above components is: after the locking block is slid into the locking groove, the fixing rod is controlled to pass through the connecting plate and then inserted into the fixing hole, and then the fixing rod is pulled to the side close to the connecting plate by the second spring, thereby well restricting the fixing rod inside the fixing hole, and then well fixing the round rod inside the connecting sleeve.

[0013] Preferably, the collecting device comprises an inclined plate, the inclined plate is fixedly connected to the bottom of one side of the support frame, a collecting frame is provided on one side of the support frame, and the collecting frame is provided on one side of the inclined plate.

[0014] The effect achieved by the above components is: when using the collecting device, some raw materials are not well stretched into fibers after cooling, and then fall onto the surface of the inclined plate, and then slide into the inside of the collecting frame through the inclined plate, thereby facilitating the recycling of the raw materials.

[0015] Preferably, a sliding groove is provided on the top of the inclined plate, and a rectangular bar is slidably connected to the inner wall of the sliding groove.

[0016] The effect achieved by the above components is: manually controlling the rectangular bar to slide inside the sliding groove, and then pushing the waste on the inclined plate into the inside of the collecting frame through the rectangular bar.

[0017] Preferably, a connecting frame is fixedly connected to one side of the support frame, an inner wall of the connecting frame is slidably connected to one end of the collecting frame, a connecting rod is slidably inserted through one side of the connecting frame, the connecting rod is slidably inserted on one side of the collecting frame, a third spring is sleeved on the surface of the connecting rod, one end of the third spring is fixedly connected to one end of the connecting rod, and the third spring is fixedly connected to one end of the connecting rod close to the connecting rod and one side of the connecting frame.

[0018] The effect achieved by the above components is: manually slide the collection frame into the interior of the connecting frame, and then insert the connecting rod through the connecting frame and into one side of the collection frame, and then pull the connecting rod through the third spring to limit the connecting rod to the interior of the collection frame. In this way, the collection frame can be well limited to one side of the bottom of the inclined plate, preventing the waste from sliding well into the interior of the collection frame.

[0019] Preferably, a groove is provided on one side of the rectangular strip, a sliding rod is fixedly connected to the inner wall of the groove, an L-shaped plate is slidingly sleeved on the surface of the sliding rod, the L-shaped plate is slidingly connected to the inner wall of the groove, a fourth spring is sleeved on the surface of the sliding rod, one end of the fourth spring is fixedly connected to one side of the inner wall of the groove, and one end of the fourth spring close to the sliding rod is fixedly connected to the top of the L-shaped plate.

[0020] The effect achieved by the above components is: when the rectangular bar is not in use, the L-shaped plate is manually controlled to slide to the bottom of the groove, so that one side of the L-shaped plate is set on one side of the inclined plate, and then the L-shaped plate is squeezed by the fourth spring, so that one side of the L-shaped plate is set on one side of the inclined plate, thereby well clamping the rectangular bar on the top of the inclined plate.

[0021] The beneficial effects of the utility model are:

[0022] The adjusting device of the utility model is used to manually control the connecting sleeve to move on the surface of the centrifugal roller. When the center of the centrifugal roller is worn, the connecting sleeve is manually placed on the surface of the centrifugal roller to cover the worn area. The rectangular rod can ensure that the connecting sleeve can rotate with the rotation of the centrifugal roller, so that the service life of the centrifugal roller can be extended to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a rock wool fiberizing centrifuge proposed by the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of a novel limiting rod proposed in the utility model;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of a novel clamping block proposed by the utility model;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of a novel inclined plate proposed by the utility model.

[0028] Legend: 1. Support frame; 2. Motor; 3. Centrifugal roller; 4. Air ring; 5. Air outlet; 6. Adjustment device; 601. Connecting sleeve; 602. Rectangular rod; 603. Limit rod; 604. First spring; 605. Round plate; 606. Positioning groove; 607. Round rod; 608. Positioning block; 609. Connecting plate; 610. Fixing rod; 611. Fixing hole; 612. Second spring; 7. Collecting device; 701. Inclined plate; 702. Collecting frame; 703. Connecting frame; 704. Connecting rod; 705. Third spring; 706. Sliding groove; 707. Rectangular bar; 708. Groove; 709. Sliding rod; 710. L-shaped plate; 711. Fourth spring. DETAILED DESCRIPTION

[0029] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1, as Figure 1-4 As shown, a motor 2 is evenly and fixedly connected to one side of the support frame 1, a centrifugal roller 3 is evenly and fixedly connected to the output end of the motor 2, a wind ring 4 is provided on one side of the centrifugal roller 3, an air outlet 5 is evenly and fixedly connected to one side of the air ring 4, an adjusting device 6 is provided at one end of the centrifugal roller 3, and a collecting device 7 is provided on one side of the support frame 1. When using the centrifuge, the rock is first melted at high temperature in a melting furnace, and then the melted raw material is poured onto the top of the centrifugal roller 3, and then the surface of the centrifugal roller 3 is cooled and fiberized through the rotation of the centrifugal roller 3, and then fixed into shape through the subsequent felt board, so that it can be well processed into a fire-proof and energy-saving thermal insulation material.

[0032] Reference Figure 2 and Figure 3 The adjusting device 6 includes a connecting sleeve 601, which is slidably sleeved on the surface of the centrifugal roller 3. A rectangular rod 602 is fixedly connected to one side of the connecting sleeve 601, and one side of the rectangular rod 602 is slidably inserted on the surface of the connecting sleeve 601. When the adjusting device 6 is used, the connecting sleeve 601 is manually controlled to move on the surface of the centrifugal roller 3. When the middle of the centrifugal roller 3 is worn, the connecting sleeve 601 is manually sleeved on the surface of the centrifugal roller 3 to cover the worn area. The rectangular rod 602 can ensure that the connecting sleeve 601 can rotate with the rotation of the centrifugal roller 3, which can extend the use of the centrifugal roller 3 to a certain extent. The limiting rod 603 is inserted and slidably penetrated on one side of the connecting sleeve 601, and a circular plate 605 is fixedly connected to the surface of the limiting rod 603. A first spring 604 is sleeved on the surface of the limiting rod 603, and one end of the first spring 604 is fixedly connected to one side of the centrifugal roller 3. One end of the first spring 604 close to the limiting rod 603 is fixedly connected to one side of the circular plate 605. When the connecting sleeve 601 is manually controlled to move on the surface of the centrifugal roller 3, the first spring 604 is compressed, thereby making the connecting sleeve 601 slide on the surface of the limiting rod 603. The surface of the limiting rod 603 is evenly provided with a locking groove 606, and the inner wall of the locking groove 606 is provided with a locking groove. The block 608 is fixedly connected to a round rod 607 on one side of the positioning block 608, and the round rod 607 is rotatably inserted into one side of the connecting sleeve 601. When the connecting sleeve 601 is slid to a suitable position, the round rod 607 is manually controlled to rotate on the surface of the connecting sleeve 601, so that the positioning block 608 slides into the inside of the positioning groove 606, so that the connecting sleeve 601 can be well fixed on the surface of the limiting rod 603. One side of the connecting sleeve 601 is evenly provided with fixing holes 611, and the inner wall of the fixing hole 611 is slidably connected with a fixing rod 610. The surface of the fixing rod 610 is sleeved with a connecting plate 609, and the connecting plate 609 and one end of the round rod 607 are fixedly connected. The fixing rod 610 is fixedly connected, and a second spring 612 is sleeved on the surface of the fixing rod 610. One end of the second spring 612 is fixedly connected to one end of the fixing rod 610. The end of the second spring 612 close to the fixing rod 610 is fixedly connected to one side of the connecting plate 609. When the positioning block 608 is slid into the positioning groove 606, the fixing rod 610 is controlled to pass through the connecting plate 609 and then inserted into the fixing hole 611. Then, the fixing rod 610 is pulled toward the side close to the connecting plate 609 by the second spring 612, thereby well restricting the fixing rod 610 inside the fixing hole 611, and then well fixing the round rod 607 inside the connecting sleeve 601.

[0033] Reference Figure 4The collecting device 7 includes an inclined plate 701, which is fixedly connected to the bottom of one side of the support frame 1. A collecting frame 702 is provided on one side of the support frame 1. The collecting frame 702 is provided on one side of the inclined plate 701. When the collecting device 7 is used, some raw materials are not well stretched into fibers after cooling, and then fall onto the surface of the inclined plate 701, and then slide into the inside of the collecting frame 702 through the inclined plate 701, so as to facilitate the recycling of the raw materials. A sliding groove 706 is provided on the top of the inclined plate 701, and a rectangular bar 707 is slidably connected to the inner wall of the sliding groove 706. The rectangular bar 707 is manually controlled to slide inside the sliding groove 706. The scrap on the inclined plate 701 is moved, and then the scrap on the inclined plate 701 is pushed into the interior of the collection frame 702 through the rectangular bar 707. A connecting frame 703 is fixedly connected to one side of the support frame 1. The inner wall of the connecting frame 703 is slidably connected to one end of the collection frame 702. A connecting rod 704 is inserted and slidably penetrated on one side of the connection frame 703. The connecting rod 704 is slidably inserted on one side of the collection frame 702. A third spring 705 is sleeved on the surface of the connecting rod 704. One end of the third spring 705 is fixedly connected to one end of the connecting rod 704. The end of the third spring 705 close to the connecting rod 704 is fixedly connected to one side of the connecting frame 703. The collection frame 702 is manually slid. To the inside of the connecting frame 703, and then the connecting rod 704 is inserted into the side of the collecting frame 702 after passing through the connecting frame 703, and then the connecting rod 704 is pulled by the third spring 705, and then the connecting rod 704 is restricted in the inside of the collecting frame 702, so that the collecting frame 702 can be well restricted to one side of the bottom of the inclined plate 701, so as to prevent the waste from not being able to slide well into the inside of the collecting frame 702, a groove 708 is opened on one side of the rectangular bar 707, and a sliding rod 709 is fixedly connected to the inner wall of the groove 708, and an L-shaped plate 710 is slidingly sleeved on the surface of the sliding rod 709, and the L-shaped plate 710 and the inner wall of the groove 708 slide The surface of the sliding rod 709 is sleeved with a fourth spring 711, one end of the fourth spring 711 is fixedly connected to one side of the inner wall of the groove 708, and one end of the fourth spring 711 close to the sliding rod 709 is fixedly connected to the top of the L-shaped plate 710. When the rectangular bar 707 is not in use, the L-shaped plate 710 is manually controlled to slide to the bottom of the groove 708, so that one side of the L-shaped plate 710 is set on one side of the inclined plate 701, and then the L-shaped plate 710 is squeezed by the fourth spring 711, so that one side of the L-shaped plate 710 is set on one side of the inclined plate 701, thereby well clamping the rectangular bar 707 on the top of the inclined plate 701.

[0034] Working principle: When using a centrifuge, firstly melt the rock at high temperature in a melting furnace, then pour the melted raw material onto the top of the centrifugal roller 3, and then rotate the centrifugal roller 3 to make its surface cool and fiberize, and then fix it into shape through the subsequent felt board, so that it can be well processed into a fireproof and energy-saving thermal insulation material (the technology of making rock wool fiber by a centrifuge is very mature, so it will not be described here). When using the adjustment device 6, manually control the connecting sleeve 601 to move on the surface of the centrifugal roller 3, and then when the middle of the centrifugal roller 3 appears and wears, manually sleeve the connecting sleeve 601 on the surface of the centrifugal roller 3. When the connecting sleeve 601 is manually controlled to move on the surface of the centrifugal roller 3, the first spring 604 The connecting sleeve 601 is compressed, thereby making the connecting sleeve 601 slide on the surface of the limiting rod 603. When the connecting sleeve 601 is slid to a suitable position, the round rod 607 is manually controlled to rotate on the surface of the connecting sleeve 601, thereby making the blocking block 608 slide into the inside of the blocking groove 606. After the blocking block 608 slides into the inside of the blocking groove 606, the fixing rod 610 is controlled to pass through the connecting plate 609 and then inserted into the inside of the fixing hole 611. Then, the fixing rod 610 is pulled toward the side close to the connecting plate 609 by the second spring 612, thereby well limiting the fixing rod 610 inside the fixing hole 611, thereby well fixing the round rod 607 inside the connecting sleeve 601. In this way, the connecting sleeve 601 can be well fixed in the limiting position. The surface of the positioning rod 603 can cover the worn area, wherein the rectangular rod 602 can ensure that the connecting sleeve 601 can rotate with the rotation of the centrifugal roller 3, which can extend the service life of the centrifugal roller 3 to a certain extent. When using the collecting device 7, manually slide the collecting frame 702 into the interior of the connecting frame 703, and then insert the connecting rod 704 through the connecting frame 703 and insert it into one side of the collecting frame 702, and then pull the connecting rod 704 through the third spring 705, and then limit the connecting rod 704 to the interior of the collecting frame 702, so that the collecting frame 702 can be well limited to one side of the bottom of the inclined plate 701, avoiding that the waste cannot slide well into the interior of the collecting frame 702. When some raw materials are cooled After that, the waste is not well stretched into fibers and falls onto the surface of the inclined plate 701. The rectangular bar 707 is manually controlled to slide inside the sliding groove 706, and then the waste on the inclined plate 701 is pushed into the inside of the collecting frame 702 through the rectangular bar 707, and then slides into the inside of the collecting frame 702 through the inclined plate 701, so as to facilitate the recycling of raw materials. When the rectangular bar 707 is not in use, the L-shaped plate 710 is manually controlled to slide to the bottom of the groove 708, so that one side of the L-shaped plate 710 is set on one side of the inclined plate 701, and then the L-shaped plate 710 is squeezed by the fourth spring 711, so that one side of the L-shaped plate 710 is set on one side of the inclined plate 701, so that the rectangular bar 707 is well stuck on the top of the inclined plate 701.

[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rock wool fiberizing centrifuge, comprising a support frame (1), characterized in that: A motor (2) is evenly and fixedly connected to one side of the support frame (1); an output end of the motor (2) is evenly and fixedly connected to a centrifugal roller (3); an air ring (4) is provided on one side of the centrifugal roller (3); an air outlet (5) is evenly and fixedly connected to one side of the air ring (4); an adjustment device (6) is provided at one end of the centrifugal roller (3); a collecting device (7) is provided on one side of the support frame (1); the adjustment device (6) comprises a connecting sleeve (601); the connecting sleeve (601) is slidably sleeved on the surface of the centrifugal roller (3); a rectangular rod (602) is fixedly connected to one side of the connecting sleeve (601); and one side of the rectangular rod (602) is slidably inserted on the surface of the connecting sleeve (601).

2. The rock wool fiberizing centrifuge according to claim 1 is characterized in that: A limiting rod (603) is inserted and slidably penetrated on one side of the connecting sleeve (601); a circular plate (605) is fixedly connected to the surface of the limiting rod (603); a first spring (604) is sleeved on the surface of the limiting rod (603); one end of the first spring (604) is fixedly connected to one side of the centrifugal roller (3); and one end of the first spring (604) close to the limiting rod (603) is fixedly connected to one side of the circular plate (605).

3. The rock wool fiberizing centrifuge according to claim 2 is characterized in that: The surface of the limiting rod (603) is evenly provided with locking grooves (606), the inner wall of the locking groove (606) is provided with a locking block (608), one side of the locking block (608) is fixedly connected with a round rod (607), and the round rod (607) is rotatably inserted through one side of the connecting sleeve (601).

4. The rock wool fiberizing centrifuge according to claim 1, characterized in that: One side of the connecting sleeve (601) is evenly provided with fixing holes (611), and the inner wall of the fixing hole (611) is slidably connected with a fixing rod (610), and the surface of the fixing rod (610) is sleeved with a connecting plate (609), and the connecting plate (609) is fixedly connected to one end of the round rod (607), and the surface of the fixing rod (610) is sleeved with a second spring (612), and one end of the second spring (612) is fixedly connected to one end of the fixing rod (610), and one end of the second spring (612) close to the fixing rod (610) is fixedly connected to one side of the connecting plate (609).

5. The rock wool fiberizing centrifuge according to claim 1 is characterized in that: The collecting device (7) comprises an inclined plate (701), the inclined plate (701) being fixedly connected to the bottom of one side of the support frame (1), a collecting frame (702) being provided on one side of the support frame (1), and the collecting frame (702) being provided on one side of the inclined plate (701).

6. The rock wool fiberizing centrifuge according to claim 5 is characterized in that: A sliding groove (706) is provided on the top of the inclined plate (701), and a rectangular bar (707) is slidably connected to the inner wall of the sliding groove (706).

7. The rock wool fiberizing centrifuge according to claim 6, characterized in that: A connecting frame (703) is fixedly connected to one side of the support frame (1); an inner wall of the connecting frame (703) is slidably connected to one end of the collecting frame (702); a connecting rod (704) is slidably inserted through one side of the connecting frame (703); the connecting rod (704) is slidably inserted on one side of the collecting frame (702); a third spring (705) is sleeved on the surface of the connecting rod (704); one end of the third spring (705) is fixedly connected to one end of the connecting rod (704); and one end of the third spring (705) close to the connecting rod (704) is fixedly connected to one side of the connecting frame (703).

8. The rock wool fiberizing centrifuge according to claim 7, characterized in that: A groove (708) is provided on one side of the rectangular strip (707), a sliding rod (709) is fixedly connected to the inner wall of the groove (708), an L-shaped plate (710) is slidably sleeved on the surface of the sliding rod (709), the L-shaped plate (710) is slidably connected to the inner wall of the groove (708), a fourth spring (711) is sleeved on the surface of the sliding rod (709), one end of the fourth spring (711) is fixedly connected to one side of the inner wall of the groove (708), and one end of the fourth spring (711) close to the sliding rod (709) is fixedly connected to the top of the L-shaped plate (710).