Combined dustproof ring for emulsion pump

Abstract

The utility model relates to a combined dustproof ring for an emulsion pump, which comprises a sliding ring, the sliding ring sleeves the outer side of a piston rod and is connected with a mounting groove of an emulsion pump body, a dustproof lip and a sealing lip are arranged on one side, close to the piston rod, of the sliding ring, and the dustproof lip and the sealing lip are sequentially arranged in the direction close to the bottom of a cylinder body of the emulsion pump; the sealing lip and the dustproof lip can abut against the side wall of the piston rod. The O-shaped ring sleeves the outer side of the piston rod and can abut against the side, away from the piston rod, of the sliding ring; through the combined design of the sliding ring and the O-shaped ring, the sealing performance of the dustproof ring is improved while the dustproof performance of the dustproof ring is guaranteed, and therefore the purposes that the sealing performance of the dustproof ring is poor, and leakage is prone to occurring in the using process are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of emulsion pump production, and in particular to a combined dust ring for an emulsion pump. Background Art

[0002] Emulsion pumps are used in coal mining working faces to provide emulsion for hydraulic supports. Dust rings are an indispensable part of emulsion pumps.

[0003] In the related art, for example, a Chinese patent with patent announcement number CN211039004U proposes a plunger sealing and cooling device, which includes a positioning sleeve, a large U-shaped sealing ring, a stuffing box, a water jacket, a small U-shaped sealing ring and a dust ring; the large U-shaped sealing ring is installed in the inner hole sealing groove of the positioning sleeve, and plays a high-pressure sealing role for the emulsion; the small U-shaped sealing ring is installed in the first inner hole groove of the stuffing box; the dust ring is installed in the second inner hole groove of the stuffing box; the positioning sleeve with a large U-shaped sealing ring, the water jacket and the stuffing box with a small U-shaped sealing ring and a dust ring are installed on the plunger in sequence, the small U-shaped sealing ring is used to play a low-pressure sealing role for the coolant between the stuffing box and the plunger, and the dust ring is used to prevent external contaminants from entering between the stuffing box and the plunger.

[0004] The emulsion pump is used in coal mining working faces to provide emulsion for hydraulic supports. The working principle is to rely on the rotation of the crankshaft to drive the piston to do reciprocating motion to achieve liquid suction and discharge. Unlike the traditional oil cylinder sealing working conditions, the emulsion pump runs very fast, and the peak reciprocating speed can reach 2.9m / s. The emulsion pump requires both a static seal that can seal the pure water medium and a dynamic seal that can prevent dust. Due to the special design of the pump, the installation space of the seal is very small. While preventing dust, the dynamic seal also needs to have the ability to seal hydraulic oil. When the above-mentioned dust ring is used in the emulsion pump, although it can remove the excess oil film on the piston rod and prevent the appearance of "oil ring" during the reciprocating motion, the sealing performance of the dust ring is poor and it is easy to leak during use. Utility Model Content

[0005] In order to improve the problem that the dustproof ring has poor sealing performance and is prone to leakage during use, the present application provides a combined dustproof ring for an emulsion pump.

[0006] The combined dust ring for an emulsion pump provided in the present application adopts the following technical solution:

[0007] A combined dust seal for an emulsion pump, comprising:

[0008] A slip ring is sleeved on the outside of the piston rod and connected to the mounting groove of the emulsion pump body. A dust lip and a sealing lip are arranged on the side of the slip ring close to the piston rod, and the dust lip and the sealing lip are arranged in sequence along the direction close to the bottom of the emulsion pump cylinder body. Both the sealing lip and the dust lip can contact the side wall of the piston rod.

[0009] The O-ring is sleeved on the outside of the piston rod and can contact the side of the slip ring away from the piston rod.

[0010] Furthermore, the slip ring includes a connecting section and a sealing section that are fixedly connected. The connecting section is located on the side of the sealing section that is away from the bottom of the emulsion pump cylinder body. Along the direction perpendicular to the axial direction of the piston rod, the size of the connecting section is larger than the size of the sealing section, so that the cross-sections of the connecting section and the sealing section are L-shaped, and the connecting section and the sealing section enclose a groove for accommodating an O-ring.

[0011] Furthermore, the O-ring abuts against a side wall of the connecting section.

[0012] Furthermore, a connection angle between the connection section and the sealing section on a side close to the O-ring is set to be a rounded angle.

[0013] Furthermore, a connection position between the side of the dust lip close to the sealing lip and the slip ring is configured to be arc-shaped.

[0014] Furthermore, along a direction perpendicular to the length of the piston rod, a size of the dust ring is larger than a size of the mounting groove.

[0015] Furthermore, the connecting section extends from a side away from the piston rod to 1 / 2 to 2 / 3 of the cross section of the O-ring.

[0016] In summary, the beneficial technical effects of the present application are as follows: the combined design of the slip ring and the O-ring improves the sealing performance of the dustproof ring while ensuring the dustproof performance of the dustproof ring, thereby achieving the purpose of improving the poor sealing performance of the dustproof ring and the problem of leakage that easily occurs during use;

[0017] The dustproof ring in the present application can be adapted to the working conditions where the installation space of the emulsion pump is small and the dustproof ring is required to have both dustproof and sealing capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of an embodiment of the present application.

[0019] Figure numerals: 100, slip ring; 110, connecting section; 120, sealing section; 121, sealing lip; 122, dust lip; 130, accommodating groove; 200, O-ring; 300, piston rod; 400, emulsion pump cylinder; 410, mounting groove. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0021] The present application embodiment discloses a combined dust ring for an emulsion pump. Figure 1 The dust seal includes a slip ring 100 and an O-ring 200 .

[0022] The slip ring 100 is sleeved on the outside of the piston rod 300 and can be connected to the mounting groove 410 of the emulsion pump cylinder 400 .

[0023] The slip ring 100 includes an integrally formed connecting section 110 and a sealing section 120. The connecting section 110 is located on the side of the sealing section 120 away from the bottom of the emulsion pump cylinder 400, and is located on the side of the sealing section 120 away from the piston rod 300, so that the side of the connecting section 110 away from the piston rod 300 extends beyond the sealing section 120, and further the cross-sections of the connecting section 110 and the sealing section 120 are L-shaped, and the connecting section 110 and the sealing section 120 enclose a receiving groove 130 for receiving the O-ring 200. A dust lip 122 and a sealing lip 121 are integrally formed on the side of the sealing section 120 close to the piston rod 300, and the dust lip 122 and the sealing lip 121 are sequentially arranged in a direction close to the bottom of the emulsion pump cylinder 400, and both the dust lip 122 and the sealing lip 121 can contact the side wall of the piston rod 300.

[0024] The dust lip 122 has a triangular cross section and an obtuse angle between the dust lip 122 and the piston rod 300. The connection position between the dust lip 122 and the slip ring 100 near the sealing lip 121 is set to an arc, and the center of the arc is located near the piston rod 300.

[0025] Along the direction perpendicular to the length of the piston rod 300 , the size of the dust ring is larger than the size of the mounting groove 410 , so that the sealing section 120 is in close contact with the outer side wall of the piston rod 300 to achieve a sealing effect.

[0026] In order to improve the contact stress of the sealing lip 121 of the dust ring to achieve the ability to seal a medium pressure of 10 Bar, the side of the connecting section 110 away from the piston rod 300 extends to between 1 / 2 and 2 / 3 of the cross-section of the O-ring 200, and the O-ring 200 contacts the side wall of the connecting section 110, thereby increasing the contact stress of the product and improving the sealing ability of the product by reducing the thickness of the slip ring 100 and increasing the wire diameter of the O-ring 200.

[0027] In order to prevent the connection position of the connection section 110 and the sealing section 120 from being damaged due to stress concentration, the connection angle between the connection section 110 and the sealing section 120 on the side close to the O-ring 200 is set to be a rounded angle.

[0028] The implementation principle of the combined dust ring for an emulsion pump in the embodiment of the present application is as follows: the O-ring 200 and the slip ring 100 are connected to the mounting groove 410 of the emulsion pump cylinder 400 in sequence, and then the piston rod 300 is installed in place to realize the installation of the dust ring, so that when the emulsion pump is running, the dust ring can seal and dustproof the movement of the piston rod 300.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A combined dust seal for an emulsion pump, characterized in that: include: A slip ring (100) is sleeved on the outside of the piston rod (300) and connected to the mounting groove (410) of the emulsion pump cylinder body (400); a dustproof lip (122) and a sealing lip (121) are provided on a side of the slip ring (100) close to the piston rod (300); and the dustproof lip (122) and the sealing lip (121) are arranged in sequence in a direction close to the bottom of the emulsion pump cylinder body (400); and the sealing lip (121) and the dustproof lip (122) are both capable of contacting the side wall of the piston rod (300); An O-ring (200) is sleeved on the outside of the piston rod (300) and is capable of contacting a side of the slip ring (100) that is away from the piston rod (300); The slip ring (100) comprises a connecting section (110) and a sealing section (120) which are fixedly connected. The connecting section (110) is located on a side of the sealing section (120) which is away from the bottom of the emulsion pump cylinder body (400). In a direction perpendicular to the axial direction of the piston rod (300), the size of the connecting section (110) is larger than the size of the sealing section (120), so that the cross-sections of the connecting section (110) and the sealing section (120) are L-shaped, and the connecting section (110) and the sealing section (120) are enclosed to form a receiving groove (130) for receiving an O-ring (200).

2. The combined dust seal for an emulsion pump according to claim 1, characterized in that: The O-ring (200) abuts against a side wall of the connecting section (110).

3. The combined dust seal for an emulsion pump according to claim 1, characterized in that: The connection angle between the connection section (110) and the sealing section (120) on the side close to the O-ring (200) is set to be a rounded angle.

4. The combined dust seal for an emulsion pump according to claim 1, characterized in that: The dustproof lip (122) is arranged in an arc shape at a connection position with the slip ring (100) on one side close to the sealing lip (121).

5. The combined dust seal for an emulsion pump according to claim 4, characterized in that: Along a direction perpendicular to the length of the piston rod (300), the size of the dust ring is larger than the size of the installation groove (410).

6. The combined dust seal for an emulsion pump according to claim 1, characterized in that: The connecting section (110) extends from a side facing away from the piston rod (300) to 1 / 2 to 2 / 3 of the cross section of the O-ring (200).

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