A device for preventing water leakage at the outlet of a slurry pump

Abstract

The utility model relates to a kind of devices for preventing water leakage at the outlet of slag slurry pump, relate to the technical field of slag slurry pump, it includes the pump shell with sheath being arranged inside, and jackscrew device, the jackscrew device includes fixed bolt, reinforcing rib is fixedly arranged on the pump shell, the pump shell is provided with screw hole in the position of reinforcing rib, the fixed bolt is connected with the pump shell by the screw hole, the rod body end of the fixed bolt is in contact with the sheath. The utility model improves the sealing effect of slag slurry pump, reduces the occurrence probability of water leakage accident.

Description

Technical Field

[0001] This utility model relates to the technical field of slurry pumps, and in particular to a device for preventing water leakage at the outlet of a slurry pump. Background Technology

[0002] Slurry pumps, as key equipment for conveying highly abrasive and corrosive media containing solid particles, are widely used in industries such as mining, metallurgy, power, and coal. Their operational reliability and sealing effectiveness directly affect the stability and efficiency of the entire production system.

[0003] In the design of slurry pumps, a certain installation gap is usually designed between the pump casing and the sheath for the purpose of protecting vulnerable parts from wear and facilitating replacement. Theoretically, the outlet end face of the sheath should be machined to be horizontal and flush with the outlet end face of the pump casing, thus providing a flat sealing reference surface for the subsequently connected outlet cone pipe. An O-ring is typically used for static sealing between the two to prevent high-pressure slurry leakage.

[0004] Regarding the aforementioned technologies, since there is a certain gap between the pump casing and the sheath, the sheath may tilt to one side when installing the outlet cone pipe, causing the outlet end face of the sheath to be uneven with the end face of the pump casing. As a result, the O-ring seal between the outlet cone pipe of the slurry pump and the pump casing is not tight, resulting in a large gap and causing water leakage accidents. Utility Model Content

[0005] In order to improve the sealing effect of slurry pumps and reduce the probability of water leakage accidents, this utility model provides a device for preventing water leakage at the outlet of a slurry pump.

[0006] This utility model provides a device for preventing water leakage at the outlet of a slurry pump, which adopts the following technical solution: A device for preventing water leakage at the outlet of a slurry pump includes a pump casing with an internal sheath and a set screw device. The set screw device includes a fixing bolt. A reinforcing rib is fixedly provided on the pump casing. A threaded hole is opened on the pump casing at the position of the reinforcing rib. The fixing bolt is threadedly connected to the pump casing through the threaded hole. The shank end of the fixing bolt abuts against the sheath.

[0007] Preferably, the set screw device further includes a fixing nut, which is on the fixing bolt, and one end of the fixing nut abuts against the reinforcing rib.

[0008] Preferably, an elastic washer is also fixedly installed on the fixing nut, and the elastic washer abuts against the reinforcing rib.

[0009] Preferably, the elastic pad is provided with anti-slip texture, and the elastic pad abuts against the reinforcing rib through the anti-slip texture.

[0010] Preferably, the set screw device further includes a buffer pad, which is fixedly connected to the rod end of the fixing bolt, and the other end of the buffer pad abuts against the sheath.

[0011] Preferably, the end of the buffer pad away from the fixing bolt extends into an elastic portion.

[0012] Preferably, the set screw device further includes a rotating rod, which is rotatably mounted on the fixing bolt and is fixedly connected to the buffer pad.

[0013] In summary, this utility model has at least one of the following beneficial technical effects: 1. By tightening the fixing bolts, the outlet end face of the sheath can be actively and slightly adjusted, forcing the end face of the sheath to remain horizontal with the pump casing end face, eliminating the problem of uneven O-ring compression caused by tilting. This ensures that the port of the sheath and the O-ring on the outlet cone pipe are on the same plane and tightly abut against each other, eliminating tilting gaps, improving the sealing effect of the slurry pump, and reducing the probability of leakage accidents.

[0014] 2. After adding the fixing nut and adjusting the bolt position, tighten the fixing nut to lock it firmly with the reinforcing rib, forming a double locking mechanism. This greatly improves the vibration resistance and anti-loosening ability of the entire set screw device and ensures the stability of long-term operation.

[0015] 3. When the fixing nut tends to loosen slightly due to vibration, the rebound force of the elastic pad can immediately compensate, always maintaining a tight contact between the fixing nut and the fixing bolt threads, and the anti-loosening effect is better than that of rigid contact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the outer end face of the pump casing in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the inner end face of the pump casing in Embodiment 1 of this utility model; Figure 4 yes Figure 2 A schematic diagram of the central section viewed from the front. Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the anti-slip texture.

[0017] Explanation of reference numerals in the attached drawings: 100, pump casing; 110, sheath; 120, outlet cone tube; 130, O-ring; 140, reinforcing rib; 200, set screw device; 210, fixing bolt; 220, threaded hole; 230, fixing nut; 240, elastic pad; 250, anti-slip texture; 260, buffer pad; 270, elastic part; 280, rotating rod. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Example 1: This utility model discloses a device for preventing water leakage at the outlet of a slurry pump. (Refer to...) Figures 1 to 4 A device for preventing water leakage at the outlet of a slurry pump mainly includes a pump casing 100 with an internal sheath 110, and a set screw device 200. The set screw device 200 includes a fixing bolt 210. A reinforcing rib 140 is fixedly provided on the pump casing 100. A threaded hole 220 is opened on the pump casing 100 at the position of the reinforcing rib 140 on the impeller rotation plane. The threaded hole 220 passes through the reinforcing rib 140 and the pump casing 100. The fixing bolt 210 is threadedly connected to the pump casing 100 through the threaded hole 220. The rod end of the fixing bolt 210 abuts against the sheath 110.

[0024] By tightening the fixing bolt 210, the outlet end face of the sheath 110 can be actively and slightly adjusted, forcing the end face of the sheath 110 to remain horizontal with the end face of the pump casing 100, eliminating the problem of uneven compression of the O-ring 130 caused by tilting. Improving the machining accuracy of the entire pump body and sheath 110 or changing the overall structure only requires adding a set screw device 200, a simple structure with almost no increase in manufacturing cost. During the assembly or maintenance of the slurry pump, operators can easily calibrate the sheath 110 by adjusting this set screw, greatly reducing assembly difficulty and reliance on worker skill levels. This ensures that the port of the sheath 110 and the O-ring 130 on the outlet cone pipe 120 are on the same plane and tightly abut against each other, eliminating tilting gaps, improving the sealing effect of the slurry pump, and reducing the probability of leakage accidents.

[0025] Example 2: This utility model discloses a device for preventing water leakage at the outlet of a slurry pump. (Refer to...) Figure 5 and Figure 6 The main difference from Embodiment 1 is that the set screw device 200 also includes a fixing nut 230, which is disposed on the fixing bolt 210, and one end of the fixing nut 230 abuts against the reinforcing rib 140. The slurry pump operates in an environment of severe vibration, and a single bolt can easily loosen and rotate under vibration, leading to tightening failure.

[0026] After adding the fixing nut 230 and adjusting the bolt position, tighten the fixing nut 230 to firmly lock it with the reinforcing rib 140, forming a double locking mechanism. This greatly improves the vibration resistance and anti-loosening capability of the entire set screw device 200, ensuring long-term operational stability. The contact between the fixing nut 230 and the reinforcing rib 140 distributes the locking force to the more robust reinforcing rib 140, avoiding direct wear and damage to the threads of the pump housing 100 body caused by repeated tightening.

[0027] Reference Figure 5In some embodiments, an elastic washer 240 is also fixedly installed on the fixing nut 230, and the elastic washer 240 abuts against the reinforcing rib 140. The elastic washer 240 can provide a continuous elastic preload. When the fixing nut 230 has a slight tendency to loosen due to vibration, the rebound force of the elastic washer 240 can immediately compensate, always maintaining a tight contact between the fixing nut 230 and the threads of the fixing bolt 210, which has a better anti-loosening effect than rigid contact. The elastic washer 240 can absorb some vibration energy and adapt to the unevenness that may exist on the surface of the reinforcing rib 140, making the locking force distribution more uniform.

[0028] Reference Figure 6 In some embodiments, the elastic pad 240 is provided with anti-slip texture 250, which abuts against the reinforcing rib 140. The anti-slip texture 250, such as serrations or a mesh pattern, significantly increases the static friction between the elastic pad 240 and the fixing nut 230, as well as between the elastic pad 240 and the reinforcing rib 140. This makes it more difficult for the fixing nut 230 to rotate circumferentially when subjected to vibration, further improving its anti-loosening performance.

[0029] Reference Figure 5 In some embodiments, the set screw device 200 further includes a buffer pad 260, which is fixedly connected to the rod end of the fixing bolt 210, and the other end of the buffer pad 260 abuts against the sheath 110. If the sheath 110 is in direct hard contact with the steel bolt, they are prone to mutual squeezing, wear, or even indentation during tightening and vibration, affecting the disassembly of the sheath 110 or causing damage. The buffer pad 260, such as a copper pad or a nylon pad, as a soft medium, can effectively avoid such damage and protect the expensive sheath 110.

[0030] Reference Figure 5 In some embodiments, the end of the buffer pad 260 away from the fixing bolt 210 extends into an elastic portion 270. The elastic portion 270 has good extensibility and can extend outward when compressed. The elastic portion 270 of the buffer pad 260 can provide a larger contact surface than the bolt end, allowing the tightening force to be transmitted more evenly to the sheath 110, avoiding excessive local stress that could crush the sheath 110. Even if the contact surface of the sheath 110 is slightly curved or irregular, the soft elastic portion 270 can deform to fit tightly against it, ensuring effective transmission of the tightening force.

[0031] Reference Figure 5In some embodiments, the set screw device 200 further includes a rotating rod 280, which is rotatably mounted on the fixing bolt 210 and fixedly connected to the buffer pad 260. When the fixing bolt 210 is rotated for adjustment, without the rotating rod 280, the buffer pad 260 would rotate with the fixing bolt 210, causing friction and torsion on its surface in contact with the sheath 110, which could easily lead to damage or premature wear of the buffer pad 260. The presence of the rotating rod 280 enables the fixing bolt 210 to rotate while the buffer pad 260 does not rotate; the buffer pad 260 only performs axial tightening movement, greatly extending its service life.

[0032] The implementation principle of the device for preventing water leakage at the outlet of a slurry pump according to this embodiment of the utility model is as follows: By tightening the fixing bolt 210, the outlet end face of the sheath 110 can be actively and slightly adjusted, forcing it to remain horizontal with the end face of the pump housing 100. This ensures that the port of the sheath 110 and the O-ring 130 on the outlet cone tube 120 are on the same plane and tightly abut against each other, eliminating the problem of poor sealing caused by tilting, significantly improving the sealing effect and reducing the probability of leakage. The added elastic washer 240 can provide continuous elastic compensation when the nut shows a slight tendency to loosen, maintaining tight contact between the threads, further enhancing the overall anti-loosening effect and operational reliability.

[0033] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A device for preventing water leakage at the outlet of a slurry pump, comprising: The pump housing (100) with an internal sheath (110) is characterized by further including a set screw device (200), the set screw device (200) including a fixing bolt (210), a reinforcing rib (140) fixedly provided on the pump housing (100), a threaded hole (220) being opened on the pump housing (100) at the position of the reinforcing rib (140), the fixing bolt (210) being threadedly connected to the pump housing (100) through the threaded hole (220), and the rod end of the fixing bolt (210) abutting against the sheath (110).

2. The device for preventing water leakage at the outlet of a slurry pump according to claim 1, characterized in that: The set screw device (200) also includes a fixing nut (230), which is on the fixing bolt (210), and one end of the fixing nut (230) abuts against the reinforcing rib (140).

3. The device for preventing water leakage at the outlet of a slurry pump according to claim 2, characterized in that: An elastic pad (240) is also fixedly installed on the fixing nut (230), and the elastic pad (240) abuts against the reinforcing rib (140).

4. The device for preventing water leakage at the outlet of a slurry pump according to claim 3, characterized in that: The elastic pad (240) is provided with anti-slip texture (250), and the elastic pad (240) abuts against the reinforcing rib (140) through the anti-slip texture (250).

5. The device for preventing water leakage at the outlet of a slurry pump according to any one of claims 1-4, characterized in that: The set screw device (200) also includes a buffer pad (260), which is fixedly connected to the rod end of the fixing bolt (210), and the other end of the buffer pad (260) abuts against the sheath (110).

6. The device for preventing water leakage at the outlet of a slurry pump according to claim 5, characterized in that: The buffer pad (260) extends an elastic portion (270) from one end away from the fixing bolt (210).

7. The device for preventing water leakage at the outlet of a slurry pump according to claim 6, characterized in that: The set screw device (200) also includes a rotating rod (280), which is rotatably mounted on the fixing bolt (210) and is fixedly connected to the buffer pad (260).

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